Hamamatsu S11156-2048-02 CCD Image Sensor: Tall-Pixel Architecture, Sensitivity and Scientific Instrument Buying Guide

Scientific spectrometers do not depend on detector sensitivity alone. The optical system must deliver the required light onto the sensing area, the detector must accumulate and transfer that information without unacceptable losses, and the acquisition electronics must preserve useful differences between the observed wavelengths. For instruments measuring relatively weak optical signals, a detector's photosensitive geometry becomes particularly important because the height and width of each sensing element determine how the projected light can be collected. A narrow detector may be well suited to a tightly focused spectral image, while another optical system may benefit from a substantially taller photosensitive region. Hamamatsu S11156-2048-02 is a specialized back-thinned CCD linear image sensor developed for spectrometers, incorporating 2,048 effective pixels measuring 14 × 1,000 µm. Its unusually tall photosensitive geometry makes it relevant to instrument manufacturers evaluating light collection, optical throughput, detector alignment and wavelength-dependent measurement performance.

The most important physical characteristic of Hamamatsu S11156-2048-02 is its combination of a fine 14 µm pitch along the sensing direction and a 1,000 µm photosensitive height perpendicular to that direction. Across 2,048 effective sensing elements, the detector provides an active area of approximately 28.672 × 1.000 mm. In a dispersive spectrometer, wavelengths are normally separated along the long dimension of the detector, while the height of the optical image depends on slit geometry, focusing optics, source dimensions and mechanical alignment. A taller photosensitive element can receive light distributed over a larger vertical region, potentially improving useful photon collection when the optical system is designed to illuminate that area. However, a larger sensing region may also receive additional unwanted background, and the degree of improvement depends on how much useful optical energy reaches the detector rather than on pixel dimensions alone.

Hamamatsu S11156-2048-02 uses a back-thinned CCD architecture with a nominal spectral response extending from approximately 200 to 1100 nm. This wavelength range includes significant ultraviolet, visible and near-infrared regions, allowing the detector to be evaluated for different scientific measurement applications. The manufacturer also incorporates an electronic shutter and resistive-gate charge-transfer structure designed to support controlled exposure and relatively low residual signal between acquisitions. A minimum integration time of 2 µs, maximum 10 MHz readout speed and typical 0.1% image lag are among the relevant published characteristics. These features make the detector more specialized than an ordinary linear sensor selected only for its number of pixels, because scientific measurements may depend on exposure control, efficient charge transfer and repeatable response when illumination changes.

The importance of the 1,000 µm photosensitive height becomes clearer when compared with a related Hamamatsu detector. Hamamatsu S11155-2048-02 uses the same 14 µm horizontal pitch and 2,048 effective sensing elements but has a 500 µm photosensitive height. Hamamatsu S11156-2048-02 therefore provides twice the geometric photosensitive area per pixel. This does not mean it automatically produces twice the usable signal in every instrument. If the optical system concentrates all relevant light into the central 300 µm of the detector, for example, increasing the physical height from 500 to 1,000 µm may collect little additional useful energy. Conversely, where the dispersed image extends over a substantial vertical region, the taller architecture may capture light that would otherwise fall outside a shorter pixel. The practical advantage must be established from the instrument's actual optical image and background conditions.

For international equipment manufacturers searching for an image sensor supplier, such differences make exact manufacturer part-number selection particularly important. A detector's pixel count and spectral response can appear similar across related products while its photosensitive geometry produces a very different result in the finished instrument. The optical design, detector mounting and calibration method may already be established around a particular sensing height. Replacing that device with another variant merely because the number of pixels matches can change the amount of light collected or the susceptibility to unwanted illumination. OEM purchasing teams should therefore preserve the exact model approved during engineering qualification unless a technically evaluated alternative has been authorized.

The detector also has measurable electronic characteristics that matter to scientific performance. Hamamatsu specifies typical readout noise of approximately 30 electrons RMS and typical dark current of 15,000 electrons per pixel per second under the manufacturer's stated measurement conditions, including MPP operation for the dark-current value. These specifications should be interpreted alongside the integration time, operating temperature and useful optical signal. In particular, the taller photosensitive area may be advantageous for collecting additional photons but also has a different dark-current characteristic from the related 500 µm device. The appropriate engineering decision therefore involves signal-to-noise performance under realistic measurement conditions rather than an assumption that a larger pixel is always preferable.

Kyptec Automation® provides a dedicated Image Sensor category covering Hamamatsu along with Toshiba and ON Semiconductor technologies. Its published sourcing page invites buyers to provide the manufacturer, exact part number and quantity, creating a focused enquiry route for scientific equipment developers and international OEM purchasing teams. The category also includes worldwide export contact information, enabling buyers outside India to submit defined semiconductor requirements. This is particularly useful for specialized detectors such as Hamamatsu S11156-2048-02 because the approved sensor geometry and readout architecture may be central to a spectrometer's calibration and production design. Actual stock availability, prices, commercial documentation and delivery arrangements must be confirmed for the requested transaction.

This guide focuses on Hamamatsu S11156-2048-02 as a tall-pixel scientific CCD rather than repeating a general comparison of CCD and CMOS technologies. It examines how its 1,000 µm photosensitive height affects slit-image matching, light collection and stray-light exposure; how the back-thinned semiconductor and electronic shutter influence scientific acquisition; and how to evaluate sensitivity, dark current, optical calibration and production repeatability. It also addresses instrument applications and global OEM procurement, providing a practical technical buying reference for manufacturers who need to determine whether the device's distinctive pixel geometry is genuinely advantageous for their equipment.

Hamamatsu S11156-2048-02 Tall-Pixel CCD Architecture, Optical Throughput and Signal Quality

The photosensitive geometry of Hamamatsu S11156-2048-02 is its most distinctive engineering feature. Each of its 2,048 effective elements is approximately 14 µm wide and 1,000 µm tall, creating a rectangular sensing region that is much taller than the narrow wavelength-sampling pitch. This arrangement is designed for optical systems where the useful information is dispersed along one direction but the illuminated image has appreciable height in the other. In a spectrometer, the long detector axis corresponds to successive wavelength positions, while the pixel height determines how much of the perpendicular image can be accepted. A detector with a taller photosensitive region may support greater optical collection when the dispersed beam is not concentrated into a narrow line. Its practical suitability should therefore be evaluated through the actual optical design rather than inferred solely from the semiconductor's nominal sensitivity.

A useful way to understand the device is to examine the relationship between entrance-slit height and detector illumination. The slit defines an illuminated region that is imaged through the spectrometer optics onto the sensor. The resulting image height depends on optical magnification, aberrations and alignment. If the projected image is approximately 800 µm tall and remains suitably concentrated within the detector region, a 1,000 µm photosensitive element may accept more of that distribution than a shorter 500 µm element. The improvement depends on the intensity distribution within the image, not simply the difference between the two nominal heights. In an optical arrangement where the majority of useful energy falls within a smaller region, the taller device may offer less benefit. The OEM should therefore quantify the light falling inside the intended sensing area and compare that value with the background contribution.

For manufacturers selecting CCD image sensors for scientific instruments, this relationship between pixel height and light collection is more informative than a simple comparison of detector resolution. Hamamatsu S11156-2048-02 and its related shorter-pixel variant provide the same number of wavelength-sampling positions and the same horizontal pitch. Their principal optical distinction is the photosensitive height available at each wavelength position. If the spectrometer's resolving power is limited by its grating, slit width or imaging optics, selecting the taller device does not automatically create finer spectral detail. Its possible advantage is accepting additional useful light distributed vertically. This makes it important to separate the goal of collecting photons from the different goal of resolving closely spaced wavelengths.

Increasing the photosensitive region can also increase exposure to unwanted illumination. Stray light from reflections, scattering or imperfect optical baffling may reach parts of the detector outside the intended spectral image. If that unwanted light falls within the additional height of the taller pixel, it can contribute to the measured signal and reduce analytical accuracy. The result depends on the optical system's construction and the spatial distribution of stray light, but it demonstrates why a physically larger detector is not automatically a better detector. A successful design should direct as much useful optical energy as possible onto the sensing region while excluding unwanted illumination. The spectrometer housing, grating arrangement, optical coatings and internal baffling can therefore be as important as the semiconductor's photosensitive area.

Hamamatsu S11156-2048-02 has an active horizontal sensing length of 28.672 mm, established by the 2,048 effective elements at a 14 µm pitch. This dimension determines the region over which the optical system can distribute the selected wavelength interval. An instrument designed to cover a broad spectral range must spread that information across the available length, while one dedicated to a narrower range may use the same sampling positions to obtain finer nominal wavelength spacing. However, nominal wavelength spacing is not equivalent to spectral resolving power. An optical feature may illuminate several adjacent elements because of slit width, diffraction-grating performance and imaging aberrations. The detector should therefore be incorporated into an optical design whose actual line-spread function is suitable for the intended analytical measurement.

For OEMs evaluating linear CCD image sensors, the 14 µm pitch is relevant to wavelength sampling, while the 1,000 µm height is relevant to perpendicular light collection. These dimensions should be assessed independently. A spectrometer attempting to resolve narrow spectral features must maintain suitable optical focus along the dispersion axis, whereas a system intended to maximize the collection of relatively weak light may benefit from a taller image acceptance region. Both objectives can be important, but they are not achieved by the same design parameter. Engineers should therefore calculate the expected spectral image size in two dimensions and verify the actual light distribution at the detector plane before selecting the semiconductor.

The device's back-thinned architecture is another important characteristic because the detector is intended for optical measurement extending into the ultraviolet region. Hamamatsu specifies a spectral response from approximately 200 to 1100 nm, making the device relevant to applications that extend beyond conventional visible imaging. Back-thinned construction changes the way light interacts with the semiconductor's photosensitive structure and can provide useful response in wavelength regions where front-side structures would otherwise influence collection. However, the actual quantum efficiency and response vary with wavelength, and the complete spectrometer may have narrower limits because of its source and optical components. A detector that responds to 200 nm light does not establish that the finished instrument can measure accurately at that wavelength without suitable ultraviolet-compatible optics.

The electronic shutter is also important because the instrument may need to control exposure across substantially different optical intensities. Hamamatsu specifies a minimum integration time of 2 µs, enabling short observation intervals under appropriate operating conditions. A bright optical signal may require a short exposure to remain within the detector's usable measurement range, while a weak optical source may require a longer interval to accumulate sufficient charge. The correct integration strategy should be established from representative signal levels and the analytical uncertainty required by the instrument. Very short exposures are useful only when enough photons are collected to produce meaningful measurements. Exposure control provides flexibility, but the detector's signal-to-noise behavior remains central to the final decision.

Hamamatsu uses a resistive-gate structure in this CCD family to support rapid charge transfer through elongated photosensitive elements. This architecture helps address the challenge of transferring collected charge from a tall pixel while limiting residual signal from previous observations. The manufacturer reports typical image lag of approximately 0.1% and identifies an improvement of nearly an order of magnitude relative to the preceding Hamamatsu S11156-2048-01 generation. This is relevant when a spectrometer must alternate between bright and weak measurements, because residual charge associated with an earlier acquisition could otherwise influence the following reading. Nevertheless, typical image-lag figures should be interpreted under their stated test conditions. The OEM should evaluate the detector using its intended shutter and transfer timing rather than treat the published value as a universal maximum.

Readout noise is another essential part of the detector's measurement capability. Hamamatsu reports typical readout noise of 30 electrons RMS for Hamamatsu S11156-2048-02 under specified conditions. This unwanted electronic contribution becomes significant when the useful optical signal is weak. A larger photosensitive area may help collect additional photons if the projected optical image occupies the additional height, but that does not eliminate readout noise or guarantee an improved signal-to-noise ratio. The actual benefit depends on how the useful charge changes relative to unwanted electronic contributions and background light. A suitable evaluation should therefore compare measured signal-to-noise performance at the intended wavelength and integration time rather than rely solely on pixel dimensions.

Dark current deserves particular attention because the taller detector has a different typical value from the related 500 µm device. Hamamatsu specifies approximately 15,000 electrons per pixel per second for Hamamatsu S11156-2048-02 under its stated temperature and MPP measurement conditions. For an otherwise comparable related shorter-pixel device, the published typical value is approximately 10,000 electrons per pixel per second. These figures do not mean that every exposure contains the quoted number of dark electrons, since the contribution depends on integration time and operating temperature. They do show that a larger collection region does not provide additional useful signal without possible trade-offs. An OEM evaluating weak-light spectroscopy should compare the actual signal collected from the optical image with the dark contribution and associated noise under realistic exposure conditions.

The relationship between dark current and useful light collection can be understood through representative measurement tests. If the taller detector collects substantially more useful optical charge because the spectral image occupies a large vertical region, that gain may justify its additional dark-current contribution. If the optical image is already fully accepted by a shorter detector, the taller device may not deliver a corresponding benefit. The correct comparison depends on the instrument's optical design, illumination and integration time. An engineering decision should therefore involve actual measurements or sufficiently reliable system modelling rather than an assumption that greater detector area always produces higher sensitivity.

For scientific equipment developers researching high sensitivity image sensors, the useful distinction is between geometric light collection and intrinsic semiconductor response. The 1,000 µm height increases the physical region available for accepting light, while back-thinned CCD construction influences how incident photons are converted into useful signal. These effects are related but should not be confused. The amount of collected charge depends on illumination distribution, wavelength response, exposure and the semiconductor's operating characteristics. The practical sensitivity of the completed spectrometer must also account for the optical throughput and electronic readout chain. Accurate evaluation therefore requires a measurement-based comparison of the proposed detector configurations under the intended operating conditions.

The device is specified as non-cooled, which may simplify instrument construction by avoiding active detector cooling hardware. However, its dark-current characteristic remains temperature-dependent, and measurement performance should be evaluated across the instrument's intended environmental range. A scientific analyzer used in a controlled laboratory may experience different conditions from a compact optical instrument installed near process equipment. The OEM should establish suitable operating limits and determine whether dark-reference corrections, temperature monitoring or other procedures are necessary to maintain performance. Non-cooled operation is a practical design feature, but it does not eliminate the need for thermal evaluation when long integrations or weak signals are involved.

Hamamatsu S11156-2048-02 is housed in a ceramic package with a quartz optical window. The mechanical design must position the active sensing region accurately relative to the spectrometer's optical image, while the window should be protected from contamination and unsuitable handling. The quartz window is relevant to broad ultraviolet-capable response, but the complete instrument's usable wavelength range depends on the transmission of all optical components. The package also establishes particular mounting and electrical requirements that should be reviewed against the manufacturer dimensional drawings. A detector with suitable photosensitive dimensions cannot provide consistent scientific measurements if the PCB or optical housing positions it inaccurately.

Scientific Instrument Applications, Tall-Slit Spectrometer Design and Measurement Validation

The most direct application for Hamamatsu S11156-2048-02 is a dispersive spectrometer whose optical arrangement produces a relatively tall spectral image. In such instruments, the 1,000 µm photosensitive height can be considered as a means of accepting more useful light without increasing the number of horizontal wavelength-sampling elements. This may be relevant to optical systems using a relatively tall entrance slit, fiber-coupled illumination with a larger projected image or optical geometries in which some vertical spread is unavoidable. The value depends on whether the light entering the additional photosensitive region carries useful information. An OEM should examine the image formed at the detector plane and determine whether the taller device improves measurement quality sufficiently to justify its selection.

A tall entrance slit can admit more light into a spectrometer when other parts of the optical design permit it, but the relationship between slit dimensions and measurement quality is not unlimited. Increasing slit height affects the amount and spatial distribution of illumination, while slit width has a more direct influence on spectral line broadening along the dispersion direction. These dimensions serve different functions and should be optimized separately. Hamamatsu S11156-2048-02 may be relevant to systems designed around a tall image, but the optical designer must maintain suitable focus and control unwanted reflections. The detector should be selected after the useful projected image height has been established rather than used as a reason to enlarge an otherwise unsuitable slit.

For laboratory instrument manufacturers sourcing UV visible spectroscopy sensors, the broad 200–1100 nm response offers useful design possibilities across different analytical wavelength regions. However, a UV-visible instrument may not use the entire detector response band, and the actual usable spectrum depends on the source, grating, optical materials and required precision. A spectrometer intended for short-wavelength absorbance measurement needs sufficient ultraviolet light to reach the detector, while a system operating toward 1100 nm should evaluate the diminishing or changing response near the detector's long-wavelength boundary. The instrument should therefore be qualified at the wavelengths most important to its intended measurements, including the most demanding endpoints. A broad datasheet range is valuable but cannot replace wavelength-specific testing.

Absorbance spectroscopy provides an application where the relationship between optical throughput and detector noise can be particularly important. A sample may transmit only a small portion of incident light at certain wavelengths, producing weak signals that must be compared with a reference. If the taller photosensitive region captures additional useful light, the instrument may benefit from a stronger detected signal under those conditions. However, higher background or dark contribution could offset part of that advantage. The manufacturer should assess the measurement uncertainty at the weakest expected transmission levels and determine whether the sensor produces sufficiently repeatable results. The choice of Hamamatsu S11156-2048-02 should therefore follow the expected sample range and optical geometry, not a general assumption that larger pixels always improve absorbance accuracy.

Optical emission spectroscopy creates another relevant use case because an emitted spectrum can contain strong and weak peaks simultaneously. The back-thinned CCD's spectral response and electronic shutter may help support controlled acquisition, while the resistive-gate architecture is relevant to managing residual signal between exposures. When an instrument observes a bright emission followed by a much weaker one, low image lag can be useful for reducing carryover from earlier readings. However, actual peak detectability depends on source intensity, optical throughput, background and electronic noise. A detector with a tall photosensitive region may capture additional light from a broader projected emission image, but the instrument must verify that the extra collected signal is useful rather than unwanted background.

An instrument used for optical process monitoring may also benefit from appropriate exposure control. The measured light intensity can change as a material or process condition varies, requiring the detector to accommodate a practical range of signal levels. Hamamatsu S11156-2048-02 includes an electronic shutter that supports different integration intervals, but the measurement controller must apply those settings consistently. If exposure changes during acquisition, the instrument may need appropriate normalization to compare consecutive measurements. The usable sampling rate depends on the selected integration time and readout sequence, while the process itself may introduce movement or illumination variation. The OEM should therefore validate the complete measurement cycle under representative operating conditions.

For manufacturers purchasing spectrometer image sensors, the maximum 10 MHz readout speed and 4,633 lines-per-second maximum rate are useful specifications, but they should not be interpreted as the guaranteed measurement frequency of the finished instrument. Hamamatsu also lists a typical line rate of approximately 2,327 lines per second. A scientific instrument may use longer integrations, multiple reference measurements or averaging to achieve its required uncertainty, reducing the effective rate of final calibrated spectra. A dynamic measurement may prioritize shorter intervals, but such operation is useful only if the optical source provides adequate signal. The correct acquisition schedule should balance temporal requirements with the necessary measurement quality.

The tall-pixel architecture may also be considered in instruments where the optical image cannot easily be concentrated into a narrow vertical region. Certain compact or mechanically constrained designs may produce a spectral image with a height that would be poorly matched to a shorter detector. Hamamatsu S11156-2048-02 provides a larger collection region for such arrangements, potentially reducing the amount of useful light lost beyond the sensing height. However, choosing the taller device should not be used to conceal major optical defects or poor alignment. Significant aberrations, scattered light and mechanical instability can remain problematic even when the sensor captures more of the image. A properly engineered spectrometer should maintain the best practical optical focus and use the detector height to accommodate a justified image geometry.

The influence of optical alignment becomes particularly important near the upper and lower limits of the 1,000 µm sensing height. If a spectral image is displaced vertically, part of it may approach or extend beyond the active region. A taller sensor may provide additional alignment tolerance in some designs, but the actual tolerance depends on the projected image dimensions and the uniformity of illumination. The OEM should establish mechanical positioning requirements based on the expected image distribution rather than assume that the larger photosensitive height removes the need for accurate mounting. A consistent instrument requires stable alignment during manufacturing, shipping and operation.

Wavelength calibration remains necessary because the detector records intensity at physical positions rather than automatically identifying the wavelength associated with each element. The 2,048 sensing positions must be mapped to the optical spectrum projected by the grating and imaging system. An instrument may use reference lines or other appropriate standards to establish its wavelength scale, while production procedures should verify that the mapping remains accurate after assembly. Increasing pixel height does not alter the nominal 14 µm horizontal pitch, so the fundamental wavelength sampling geometry remains separate from the vertical collection advantage. The spectrometer's actual resolving power must be evaluated from optical measurements, not inferred solely from the detector's dimensions.

Background control deserves special attention in tall-pixel instruments. Light reflected from internal surfaces or scattered by optical elements may reach areas of the detector beyond the intended spectral image. A larger vertical collection region can receive more of that unwanted light if the housing is inadequately baffled. The OEM should therefore examine the optical background under conditions where the intended spectral signal is absent or weak. Measurements using blocked inputs, appropriate reference sources and representative samples can help establish whether the background remains within the analytical requirement. A detector's capacity to collect more light is beneficial only to the extent that the additional light contains useful information.

Dark-reference procedures are also important because Hamamatsu S11156-2048-02 is a non-cooled CCD with a specified typical dark current. The contribution to each acquisition depends on integration time and temperature, and weak optical measurements may be particularly sensitive to it. The OEM should determine whether the instrument requires dark measurements at particular exposure settings or temperatures and how those measurements are applied to the resulting data. Correction can address some predictable contributions, but it does not remove every form of random noise. A suitable measurement method should distinguish the detector's electronic behavior from the actual sample information and document the uncertainty associated with the final result.

The dedicated driver arrangement should be considered during instrument development because CCD operation requires suitable charge-transfer and shutter timing. Hamamatsu identifies C11165-02 as a dedicated driver circuit for Hamamatsu S11156-2048-02. This provides a manufacturer-associated reference for evaluation, while production electronics must still be qualified for the intended integration and readout conditions. A detector operated with unsuitable timing may fail to provide the expected charge-transfer performance or stable measurements. The OEM should therefore verify the driver compatibility, output acquisition and processing chain before evaluating the final scientific results. The semiconductor, its controller and the spectrometer optics must operate as a coordinated system.

Kyptec Automation® provides a focused Image Sensor enquiry route for scientific instrument manufacturers that have selected Hamamatsu S11156-2048-02 after technical evaluation. The company's category identifies Hamamatsu among its supported manufacturers and accepts precise part-number and quantity enquiries. This is useful when the detector's tall-pixel geometry has already been incorporated into the optical design, making unreviewed substitution potentially disruptive. International OEMs can communicate their component requirements through the published export contact information, with actual availability, prices and delivery conditions confirmed for the proposed transaction.

Scientific CCD Procurement, Detector Qualification and Worldwide OEM Purchasing

A sound purchasing decision for Hamamatsu S11156-2048-02 begins with a documented understanding of why the 1,000 µm photosensitive height is required. The engineering team should identify the intended wavelength range, projected image height, expected optical intensity and acceptable measurement uncertainty. These requirements help distinguish a legitimate need for a tall-pixel detector from a general preference for a larger sensing area. If a shorter detector already collects the complete useful image, the taller configuration may provide limited additional benefit. Where the optical system projects a larger useful image, the 1,000 µm sensing height may be an important part of the approved design. The procurement specification should therefore identify the complete Hamamatsu part number and the relevant technical characteristics rather than use only a generic description such as 2,048-pixel CCD.

For buyers evaluating a CCD image sensor supplier, Kyptec Automation® provides a dedicated Image Sensor category covering Hamamatsu scientific detector technologies. Its published enquiry process asks customers to specify the manufacturer, exact part number and quantity, creating a practical contact channel for OEM purchasing requirements. This is particularly relevant when a spectrometer has been calibrated around Hamamatsu S11156-2048-02 and the purchasing department must preserve that exact device identity. Kyptec Automation® also provides international export enquiry details, enabling manufacturers outside India to communicate their intended quantities and destinations for commercial consideration. Actual stock, lead time, pricing and shipment terms must be confirmed rather than inferred from the existence of the public category.

Before significant production orders are placed, an OEM should complete optical qualification using representative samples and the intended spectrometer assembly. The testing should determine whether the detector's tall photosensitive region collects additional useful signal, whether background contribution remains acceptable and whether the selected exposure conditions provide sufficient repeatability. Comparison with a shorter detector may be useful where engineering has not yet established which geometry is preferable, but the comparison should be made under equivalent optical and electronic conditions. The final decision should reflect actual signal-to-noise and analytical performance, not a simple ratio of sensing areas. Qualification should also include wavelength calibration and measurements at the most demanding points of the intended spectral range.

Electronic qualification should confirm that the CCD is operated with appropriate driver timing, shutter control and analog acquisition. The manufacturer's current datasheet and dedicated driver information should be used to establish the electrical requirements. A high-quality semiconductor can produce unsuitable instrument results if the controller introduces additional noise or fails to transfer charge correctly. The OEM should therefore test representative readout settings, integration times and transitions between different optical signal levels. A successful electrical test should be followed by optical measurements so that the complete acquisition system is validated. Technical approval should be based on the finished instrument's required performance rather than only on correct electronic communication with the detector.

The detector's ceramic package and quartz window should be incorporated into mechanical and manufacturing documentation. The optical housing must position the photosensitive region accurately relative to the dispersed image, while assembly procedures should minimize contamination and mechanical damage. The manufacturer dimensional drawing should guide PCB and mounting design. If the instrument relies on the full 1,000 µm sensing height, the mechanical tolerances should be evaluated to ensure that the intended image remains within the active region across production units. A nominally suitable detector may provide inconsistent results if its installed position varies substantially between assemblies. The OEM should therefore establish a repeatable alignment and calibration method before releasing the design for manufacture.

International manufacturers considering scientific image sensor suppliers should also evaluate the relationship between technical qualification and commercial continuity. A particular detector may become part of the approved optical design and production documentation for several years. The purchasing team should therefore request the exact manufacturer part number, confirm expected quantities and review relevant availability or lifecycle information. A related model with different photosensitive height should not be accepted automatically as a replacement. If commercial circumstances make an alternative attractive, engineering should establish the necessary optical and electronic changes and qualify the resulting instrument before approving the substitution.

Bulk ordering should be based on the actual number of detectors required for the manufacturing schedule. A scientific spectrometer may contain one linear CCD, while a more complex instrument can use multiple optical measurement channels. The purchasing forecast should account for the approved product design, expected production output and justified service or qualification requirements. Lead time and available quantity should be confirmed for the exact requested model, especially where recurring deliveries are planned. Excessive inventory can create financial risk if the instrument is redesigned, while insufficient planning can interrupt production. A suitable purchasing strategy balances continuity of supply with realistic demand and clearly established transaction conditions.

Receiving inspection should verify the delivered component identity and packaging condition against the approved purchase information. Optical semiconductors should be handled according to applicable manufacturer precautions because electrostatic discharge, contamination or mechanical stress may affect performance. The OEM may also establish suitable functional testing or sampling procedures according to its quality system. However, receiving inspection cannot independently prove that a detector will produce accurate spectra once mounted in a particular optical instrument. Production acceptance should include the necessary calibration and scientific performance tests for the completed assembly. The distinction between component inspection and instrument validation is particularly important when the design relies on a specific photosensitive geometry.

A related issue is how to manage replacement or service components. If an instrument is calibrated around Hamamatsu S11156-2048-02, replacing the detector with another device may require renewed alignment or calibration, even when the replacement carries the same model number. If a different Hamamatsu variant is proposed, the need for further qualification may be greater because sensing height or other characteristics can differ. The service procedure should therefore identify the approved replacement device and the measurements necessary to confirm continued performance. Accurate purchasing documentation helps maintain this relationship between the semiconductor and the instrument throughout its useful life.

For OEM buyers planning bulk image sensor orders, commercial enquiries should distinguish the semiconductor requirement from the conditions of the proposed transaction. The quotation should identify Hamamatsu S11156-2048-02, requested quantity, availability, pricing, expected dispatch or lead time and destination. Any required documentation, handling or shipment conditions should be clarified before an order is finalized. Kyptec Automation® provides the manufacturer-specific Image Sensor enquiry route needed to communicate such requirements, but the actual availability and commercial terms must be confirmed for the particular order. A public sourcing page does not establish immediate stock of every device in every quantity.

International shipments may involve additional landed-cost considerations, including transport, import duties, taxes and local receiving procedures depending on the destination and agreed terms. A buyer comparing component sourcing arrangements should therefore consider the complete commercial quotation rather than only the nominal unit price. Kyptec Automation® provides worldwide export contact information, allowing overseas OEMs to submit their exact Hamamatsu requirements for consideration. The sourcing process can support communication of a specialized scientific semiconductor need, while the purchaser should confirm the relevant international shipment conditions before incorporating the delivery into a production schedule.

Kyptec Automation® offers a focused commercial channel for Image Sensor requirements involving Hamamatsu and other established semiconductor manufacturers. Its dedicated category allows scientific equipment companies to communicate the exact device approved through engineering qualification and obtain transaction-specific information through an enquiry. For Hamamatsu S11156-2048-02, this model-specific process is important because the 1,000 µm photosensitive height may be integral to the spectrometer's optical design. The company's global enquiry availability supports international communication, while the OEM remains responsible for technical validation and commercial terms must be confirmed for each transaction.

Frequently Asked Questions About Hamamatsu S11156-2048-02 CCD Image Sensor

1. What is the main technical advantage of the 1000 µm pixel height in Hamamatsu S11156-2048-02?

The 1,000 µm photosensitive height provides a relatively large vertical collection region for each of the detector's 2,048 sensing elements while retaining a 14 µm pitch along the wavelength-dispersion axis. This can be beneficial when a spectrometer projects a tall spectral image onto the detector and a shorter photosensitive element would fail to collect part of the useful light. However, the advantage depends on the optical geometry and the actual distribution of illumination. If the full useful image already fits inside a shorter sensing region, a taller detector may not provide a comparable increase in signal. Additional area can also receive unwanted stray light or background, making optical control important. The correct evaluation should compare useful signal, noise and background under representative operating conditions. Hamamatsu S11156-2048-02 is therefore particularly relevant when the optical design can make productive use of its tall photosensitive region rather than simply when the buyer prefers a physically larger pixel.

2. How much larger is the photosensitive area of Hamamatsu S11156-2048-02 compared with Hamamatsu S11155-2048-02?

Hamamatsu S11156-2048-02 uses sensing elements measuring 14 × 1,000 µm, while Hamamatsu S11155-2048-02 uses 14 × 500 µm elements. Each detector has 2,048 effective elements and the same horizontal pitch, so the taller model has approximately twice the geometric photosensitive area per pixel. The full active region of the taller device is about 28.672 × 1.000 mm compared with 28.672 × 0.500 mm for the shorter variant. This physical difference is important, but it should not be interpreted as a guaranteed doubling of useful optical signal or analytical sensitivity. The amount of additional light collected depends on how the spectrometer distributes illumination vertically. If the optical image occupies only part of the shorter detector, the additional height may contribute little useful signal. Engineering should therefore compare both devices using the intended optical assembly and exposure conditions before selecting one for production.

3. Will the taller pixels of Hamamatsu S11156-2048-02 automatically produce a higher signal-to-noise ratio?

No. A taller photosensitive region can collect more useful photons when the optical image occupies the additional height, but signal-to-noise performance also depends on dark current, readout noise, background illumination and integration time. Hamamatsu specifies typical dark current of 15,000 electrons per pixel per second for Hamamatsu S11156-2048-02 under stated conditions, compared with approximately 10,000 electrons per pixel per second for the related shorter-pixel device. Both specifications must be interpreted with the manufacturer's measurement conditions in mind. If the taller detector collects substantially more useful optical signal, the trade-off may be favorable. If most useful light already falls within the shorter sensing region, additional area may provide limited benefit while introducing other contributions. The OEM should therefore evaluate the measured signal-to-noise ratio at the intended wavelengths and integration settings instead of relying on pixel dimensions alone. The best detector geometry is application-dependent.

4. Can Hamamatsu S11156-2048-02 improve light collection when a spectrometer uses a tall entrance slit?

It can be useful when the spectrometer optics project a suitably tall spectral image onto the detector and the additional photosensitive height receives meaningful optical energy. A taller entrance slit may admit more light under certain conditions, but the final image size depends on optical magnification and the layout of the spectrometer. The slit width and height also influence different aspects of the optical measurement, so they should not be treated as interchangeable design parameters. Hamamatsu S11156-2048-02 provides a 1,000 µm vertical collection region that may accommodate a larger image than a 500 µm detector. However, it cannot correct poor focus, excessive stray light or inappropriate slit geometry. The instrument designer should calculate the projected image and verify actual optical throughput using representative measurements. The advantage of the taller device should be established from the amount of useful signal collected rather than from the entrance-slit dimensions alone.

5. Does the 1000 µm sensing height improve the spectral resolution of a 2048-pixel CCD spectrometer?

The taller sensing height does not independently increase spectral resolution because the detector still contains 2,048 effective elements at a 14 µm pitch along the wavelength axis. Spectral resolution depends primarily on optical dispersion, slit width, focus and the line-spread behavior of the spectrometer. The 1,000 µm height affects how much of the optical image can be accepted perpendicular to the dispersion direction, which is a different property from separating neighboring wavelengths. A well-designed instrument may benefit from improved light collection without gaining additional independent wavelength samples. Conversely, poor optical focus may broaden spectral features even when the detector captures the full vertical image. The OEM should therefore calculate nominal wavelength sampling from the horizontal geometry and verify actual resolving power using appropriate spectral references. The taller detector should be selected for a justified collection or optical alignment requirement, not with the expectation that pixel height alone creates finer wavelength discrimination.

6. What does the 200–1100 nm spectral response mean for scientific instrument designers?

The specified response range indicates that Hamamatsu S11156-2048-02 can respond to light across a broad region extending from part of the ultraviolet through the visible spectrum and into the near-infrared. It does not mean that the detector offers equal response or equal analytical accuracy at every wavelength in that interval. The actual sensitivity varies with wavelength, and the complete spectrometer may have additional limits caused by its light source, grating, optical materials or calibration method. A UV measurement near the lower limit may require specialized optical transmission and suitable source intensity, while an application near 1100 nm should evaluate the relevant detector response and optical efficiency. The OEM should review the manufacturer's spectral response data and test representative measurements at the wavelengths important to the instrument. Broad nominal coverage is a valuable characteristic, but the usable analytical range must be established through complete system qualification.

7. Is Hamamatsu S11156-2048-02 suitable for weak-light spectroscopy without active cooling?

Hamamatsu specifies the device as non-cooled, and it can be evaluated for scientific measurements without an active cooling system. However, suitability for weak-light spectroscopy depends on the number of useful photons collected during integration and the contributions of dark current, readout noise and background. The 1,000 µm photosensitive height may help collect additional useful light where the optical image occupies that area, but it also has a specified dark-current characteristic that should be considered. The OEM should test the intended integration times and operating temperatures, especially if the instrument is expected to measure weak signals over relatively long exposures. Appropriate dark-reference correction may improve measurement consistency, but it does not eliminate all random noise. The absence of cooling simplifies certain mechanical requirements while leaving the need for performance qualification unchanged. A reliable decision should follow the instrument's required measurement uncertainty rather than a general assumption about non-cooled scientific CCD performance.

8. How does dark current affect Hamamatsu S11156-2048-02 during long integration periods?

Dark current contributes charge associated with detector operation even when useful illumination is absent, and its accumulated contribution increases with integration time under otherwise comparable conditions. Hamamatsu specifies a typical dark-current value of approximately 15,000 electrons per pixel per second under its stated reference conditions, including MPP operation. This figure is not the number of dark electrons in every measurement; the actual accumulated signal depends on the exposure duration and temperature. A short integration may produce a relatively small dark contribution, while a longer exposure can make dark signal more important when measuring weak optical features. The OEM should determine the expected useful charge and compare it with dark and readout contributions over the intended operating range. Where suitable, dark-reference correction can address part of the unwanted signal, although it cannot remove every noise component. The key consideration is whether the finished spectrometer maintains acceptable measurement uncertainty at the required integration times.

9. Why does Hamamatsu S11156-2048-02 use a resistive-gate charge-transfer structure?

The resistive-gate architecture is designed to support efficient movement of accumulated charge through the elongated photosensitive elements. In a CCD with a very tall sensing region, collected signal charge must be transferred into the readout arrangement without leaving excessive residual information behind. Hamamatsu's resistive-gate structure creates a potential slope that assists charge movement, supporting the device's low image-lag characteristics. The manufacturer identifies a typical image-lag value of approximately 0.1% and an improvement over its earlier Hamamatsu S11156-2048-01 generation. This feature can be important when a spectrometer acquires measurements with substantially different brightness levels in rapid succession. Nevertheless, the published typical figure applies under stated conditions and should not be treated as a universal maximum. The OEM must operate the CCD using the correct timing and verify actual residual-signal behavior with representative illumination changes. Efficient charge transfer contributes to measurement consistency but does not replace the need for calibration.

10. Can Hamamatsu S11156-2048-02 be used with short optical pulses or rapidly changing light sources?

The detector includes an electronic shutter with a specified minimum integration time of 2 µs, making it relevant to evaluating short-exposure scientific acquisition under suitable conditions. However, the usefulness of that capability depends on whether enough optical signal reaches the detector during the selected interval and whether the driver timing is correctly coordinated with the source. A rapidly changing optical signal may require precise synchronization, while weak pulses may provide insufficient charge for the desired measurement accuracy. The detector's low image-lag design can help reduce unwanted carryover between acquisitions, but it does not guarantee that every transient event can be measured reliably. The OEM should test the intended pulse duration, source intensity, shutter timing and electronic readout as a complete system. A short minimum integration specification establishes a design capability; actual measurement performance must be determined experimentally for the intended optical event.

11. What role does the Hamamatsu C11165-02 driver circuit play in integration?

Hamamatsu identifies C11165-02 as the dedicated driver circuit for Hamamatsu S11156-2048-02. This is relevant because the back-thinned CCD uses specialized clocking and charge-transfer arrangements that must be operated according to the manufacturer timing requirements. A dedicated driver can provide a technical reference for evaluation and may help engineers understand how the detector should be controlled. However, a driver circuit is not equivalent to a complete scientific spectrometer. The finished instrument still requires an appropriate optical system, analog acquisition, conversion, calibration and application-specific processing. OEMs developing their own production electronics should verify the electrical requirements from the current manufacturer documentation and qualify the resulting implementation. The detector's image-lag, integration and readout characteristics are meaningful only when the device operates correctly. Purchasing the approved CCD and designing suitable control electronics are therefore related but separate responsibilities.

12. Can Hamamatsu S11156-2048-02 reduce sensitivity to vertical misalignment in spectrometer assembly?

The 1,000 µm photosensitive height may provide additional geometric margin for a projected spectral image compared with a shorter sensing region, provided that the actual image and alignment variation fit within the detector's usable area. However, this does not mean that optical alignment can be ignored. The wavelength-dispersion direction still requires accurate positioning, while substantial vertical displacement may cause part of the image to approach or exceed the active region. The larger sensing height can also accept more unwanted background if the optical housing is not designed carefully. The OEM should establish mechanical tolerances from the actual projected image dimensions and test representative production assemblies. A taller detector may support a more forgiving optical geometry in some instruments, but the practical tolerance must be calculated and verified. The objective is repeatable light collection and wavelength calibration across completed instruments, not simply a larger physical sensing region.

13. Should an OEM choose Hamamatsu S11156-2048-02 instead of Hamamatsu S11155-2048-02 for every spectrometer?

No. The two devices have related back-thinned CCD architectures, the same nominal horizontal pixel count and similar broad spectral coverage, but their photosensitive heights differ substantially. Hamamatsu S11156-2048-02 provides a 1,000 µm sensing height, while Hamamatsu S11155-2048-02 provides 500 µm. The taller detector can be valuable when the optical image occupies the additional region and more useful signal can be collected. However, the taller device also has a higher published typical dark-current value under comparable manufacturer conditions. The correct choice depends on the projected optical image, expected signal intensity, background light, integration time and measurement uncertainty. An OEM should compare the devices under representative operating conditions rather than assume the taller variant is universally superior. Once one model has been qualified, its exact part number should be maintained during purchasing unless engineering has validated a change.

14. What are the most important technical documents to review before purchasing Hamamatsu S11156-2048-02?

The manufacturer datasheet is the primary reference because it provides the specified pixel geometry, wavelength response, electrical characteristics, shutter behavior, package details and relevant timing information. The OEM should also review Hamamatsu's resistive-gate CCD technical information and the applicable precautions for image sensor handling and integration. Where the dedicated driver circuit is being considered, compatibility and operating details should be confirmed using the relevant manufacturer documentation. These resources should be interpreted alongside the instrument's own optical drawings, calibration records and approved bill of materials. A datasheet describes component behavior under stated conditions, but it does not guarantee finished-system accuracy. Before a production order, engineering should confirm that the precise Hamamatsu S11156-2048-02 device has been qualified, while purchasing should verify that the commercial quotation matches the approved manufacturer identity. Kyptec Automation® provides a dedicated Image Sensor enquiry route for communicating that exact component and quantity requirement.

15. How can international OEM manufacturers enquire about bulk Hamamatsu S11156-2048-02 orders?

International equipment manufacturers can communicate a defined purchasing requirement through the Kyptec Automation® Image Sensor category, which identifies Hamamatsu among the manufacturers covered and provides worldwide export enquiry information. The request should specify Hamamatsu S11156-2048-02 as the exact part number, together with the required quantity and intended delivery destination. Where the OEM has particular documentation, packaging or shipment requirements, those should be clarified during the commercial discussion. The public category provides an enquiry channel but does not guarantee immediate stock, specific prices or delivery periods for every requested semiconductor. Those conditions should be confirmed before an order is incorporated into a manufacturing schedule. The purchasing team should also consider applicable import responsibilities and receiving procedures. A precise manufacturer-specific enquiry helps preserve the tall-pixel detector approved by engineering and reduces ambiguity between related CCD variants.

16. Why should scientific instrument OEMs consider Kyptec Automation® for Hamamatsu S11156-2048-02 sourcing?

Kyptec Automation® provides a dedicated Image Sensor sourcing offering that includes Hamamatsu scientific semiconductor technologies and supports enquiries by manufacturer, exact part number and quantity. This is useful for OEMs because Hamamatsu S11156-2048-02 has a distinctive 1,000 µm photosensitive height, back-thinned architecture and specialized CCD operating requirements that may be integral to an approved spectrometer design. Once the device has been qualified, purchasing should maintain the correct manufacturer designation rather than accept a similar detector with a different sensing height or integration configuration without engineering review. Kyptec Automation® also publishes worldwide export contact information, providing a practical enquiry route for overseas manufacturers seeking clearly identified optical components. Its wider Image Sensor offering covers other established semiconductor manufacturers, but those devices should be evaluated according to their own technical characteristics. Availability, pricing, commercial documentation and delivery terms must be confirmed for the specific transaction, while scientific instrument validation remains the OEM's responsibility.

Conclusion: Hamamatsu S11156-2048-02 Tall-Pixel CCD Technology for Scientific Instruments and Worldwide OEM Supply

Hamamatsu S11156-2048-02 is a specialized back-thinned CCD linear image sensor whose most distinctive characteristic is its 14 × 1,000 µm photosensitive geometry. With 2,048 effective sensing elements, a 28.672 mm active length and a nominal spectral response from approximately 200 to 1100 nm, it provides a technical foundation for spectrometers and scientific instruments requiring broad wavelength coverage and potentially substantial vertical light collection. The tall-pixel architecture can be advantageous when the optical system projects a spectral image that benefits from a 1,000 µm collection region, but it should not be interpreted as an automatic improvement in resolution, sensitivity or signal-to-noise performance. The actual benefit depends on how much useful light occupies the additional area and how well unwanted background is controlled.

The relationship between sensing height, readout noise and dark current is particularly important when selecting this device. Hamamatsu S11156-2048-02 has twice the geometric photosensitive area of the related 500 µm variant but also a different published dark-current characteristic. A favorable result therefore depends on whether additional useful optical charge outweighs the relevant unwanted contributions under the intended exposure and temperature conditions. The device's back-thinned construction, electronic shutter and resistive-gate charge-transfer architecture provide useful scientific acquisition capabilities, while low image lag can be relevant when illumination changes between successive measurements. Nevertheless, these characteristics require correct driver timing, suitable optical design and instrument-level validation.

OEM manufacturers should also evaluate the complete physical and electronic integration. The ceramic package, quartz window and manufacturer-identified C11165-02 driver arrangement provide important references for construction and acquisition design. The instrument must project the desired spectral image within the active detector region and calibrate the wavelength relationship using suitable optical references. Production procedures should maintain consistent positioning, protect optical surfaces and verify that the completed instrument meets its intended measurement requirements. Related CCD variants should not be substituted automatically because differences in photosensitive height may affect light collection, background and calibration.

Kyptec Automation® provides a dedicated image sensor supplier in India enquiry channel covering Hamamatsu technologies for scientific equipment and OEM purchasing requirements. Spectrometer developers, analytical instrument manufacturers and international procurement teams can submit the exact Hamamatsu S11156-2048-02 part number, quantity and destination for sourcing consideration. Its Image Sensor offering provides a focused commercial contact route for manufacturer-specific requirements, while stock availability, pricing, documentation and shipment conditions should be confirmed for each proposed order.

A dependable Hamamatsu S11156-2048-02 buying decision begins with the optical measurement problem and determines whether the device's tall-pixel construction creates a meaningful advantage within the finished instrument. By connecting projected image geometry, wavelength response, signal quality, CCD operating conditions and exact component procurement, scientific equipment manufacturers can preserve the technical performance established during development and support consistent production of instruments intended for demanding optical analysis.