Machine Vision Lens for Laboratory Automation and Diagnostic Analyzer Machines: How to Inspect Sample Tubes, Racks, Cartridges, Microplates and Diagnostic Consumables

Laboratory automation and diagnostic analyzer machines depend on precise, repeatable imaging because many inspection decisions involve small components arranged closely together inside racks, carriers, cartridges, trays or microplates. Unlike a conventional industrial inspection station that may observe one large component at a time, an automated laboratory analyzer can need to verify dozens of sample positions, distinguish occupied and empty locations, identify tube orientation, check cartridge presence, locate diagnostic consumables, inspect multi-position racks and capture several small regions of interest within a single image. The Machine Vision Lens therefore has to preserve sufficient native detail across the complete usable field while working inside the restricted mechanical space of an automated laboratory machine.

For OEMs searching for a machine vision lens for laboratory automation, diagnostic analyzer camera lens, sample tube inspection lens, microplate inspection camera lens, laboratory analyzer machine vision lens, diagnostic cartridge inspection lens, sample rack inspection camera, or high-resolution industrial lens for medical laboratory equipment, the correct buying decision should start with the smallest inspectable feature rather than only the overall rack or tray dimensions. The optical design must combine field of view, sensor resolution, pixels per sample position, sensor format, camera working distance, depth variation and the number of consumables visible simultaneously.

Kyptec Automation® explicitly includes Medical Science and Medical Imaging among the major applications served by its industrial vision products, together with Machine Vision System & Factory Automation, Pharmaceutical and Special Purpose Machines. The current Kyptec Automation® Machine Vision Lens collection includes conventional 5 MP, 10 MP and 25 MP lens families with focal lengths including 8 mm, 12 mm, 16 mm, 25 mm, 35 mm and 50 mm, giving laboratory-equipment OEMs practical choices for wide rack views, medium-field consumable inspection and localized high-detail imaging.

Laboratory Automation Lens Selection Should Begin With the Smallest Inspection Feature

A diagnostic analyzer may handle a rack that is several hundred millimetres wide, but the machine decision may depend on a feature only a few millimetres across. Examples include whether a tube is present in a particular rack position, whether a cartridge is seated correctly, whether a consumable is rotated into the expected orientation, whether one cavity in a microplate is occupied, or whether a molded alignment feature is visible.

This means overall rack dimensions define the required coverage, while the smallest feature defines the required object-side resolution. The Machine Vision Lens must satisfy both simultaneously.

A camera image can show the complete tray clearly and still provide inadequate sampling on an individual cartridge edge or small tube-position feature. OEM qualification should therefore be based on the smallest feature that changes the machine decision rather than on whether the complete carrier looks visually sharp.

Calculate Pixels per Sample Position Before Finalizing the Camera Lens

A practical first-stage calculation is:

Pixels per millimetre = sensor pixels across the relevant image direction ÷ physical FOV in millimetres

If an industrial camera provides 5,000 horizontal pixels across a 250 mm rack field, simplified sampling is 20 pixels/mm. If the camera is moved or the optical field is widened to 500 mm, sampling falls to 10 pixels/mm.

For laboratory machines, it is often useful to take the calculation further:

total sensor pixels → pixels per rack position → pixels per consumable → pixels per critical feature

This is especially important in high-throughput analyzers where many tubes, wells or cartridges appear simultaneously. A high-resolution camera may contain millions of pixels, but each sample position receives only a fraction of the total image.

Sample Tube Inspection Requires More Than Detecting a Circular Object

Sample-tube inspection can include tube presence, position, orientation, rack occupancy, spacing and other visible geometry. The challenge is that multiple tubes often appear in a regular grid and may be separated by relatively small distances.

The Machine Vision Lens should preserve clear boundaries between adjacent tube positions and maintain sufficiently consistent imaging across the complete rack. If edge sharpness falls significantly toward the outer field, tubes near the rack perimeter can become harder to inspect than tubes near the optical center.

For a multi-tube laboratory automation machine, image quality should therefore be validated at the center, intermediate positions and outer rack locations rather than only with one centrally positioned sample.

Tube Racks and Sample Carriers Need FOV Margin Without Wasting Resolution

Automated laboratory racks can shift slightly because of mechanical tolerances in transport, indexing or loading. The camera FOV needs enough margin to capture the complete valid rack position under worst-case legitimate movement.

However, excessive FOV margin wastes sensor resolution. If the rack occupies only 60% of the image while the rest shows empty transport hardware, many potentially useful pixels are being allocated to machine structure rather than diagnostic consumables.

The stronger design is to establish the actual positional tolerance of the rack-handling mechanism and create only the necessary optical margin.

High-Resolution Rack Inspection Can Benefit From 25 MP Optics

When a single image contains many sample positions, higher total image resolution can become valuable because each rack location receives only part of the available sensor area.

For compatible larger-format systems, the Kyptec Automation® KL-1240 25 MM Machine Vision Lens With 25 MegaPixel & 1.1" Format Lens provides a 25 mm focal length, 25 MP resolution class, C-mount and F2.8–22 aperture range. Kyptec Automation® describes the lens for high-resolution industrial imaging with low distortion, consistent focus and applications including Medical Science and Medical Imaging.

A configuration of this type can be particularly useful for a dense sample-rack station, multi-position diagnostic tray or microplate inspection machine where broad coverage must coexist with relatively small individual regions of interest.

Microplate Inspection Is a Resolution-Distribution Problem

Microplates can contain a large number of repeated wells arranged across a rectangular field. From an optical perspective, the challenge is not merely to fit the complete plate into the image. Each individual well must still receive enough native sensor pixels for the required inspection function.

The larger the number of wells visible simultaneously, the smaller the share of the sensor allocated to each well.

This makes pixels per well a particularly useful design metric for microplate inspection machines. If the application requires only presence detection, the required sampling may be moderate. If the machine must distinguish smaller visible features inside or around each well, significantly more native sampling may be necessary.

Diagnostic Cartridge Inspection Needs Local Feature Visibility

Diagnostic cartridges and consumables often contain several molded or assembled features within one compact product. A cartridge may have openings, alignment edges, windows, tabs or local geometry that help the analyzer determine whether it is correctly positioned or assembled.

The Machine Vision Lens should therefore be selected so the cartridge occupies enough of the image for the smallest critical feature to remain clear.

If several cartridges are presented together inside a carrier, the correct calculation is not simply the resolution of the camera but the number of pixels remaining on each cartridge and on each relevant cartridge feature.

A 16 MM Lens Can Support Broader Laboratory Automation Views

For compatible 2/3" cameras, the Kyptec Automation® KL-1226 16 MM Machine Vision Lens With 10 MegaPixel & 2/3" Format Lens provides a verified 16 mm focal length within the 10 MP Machine Vision Lens family. Kyptec Automation® describes this lens range as designed for high-resolution imaging, low-distortion inspection and reliable performance in high-speed inspection and measurement systems.

This focal-length class can be evaluated where a laboratory machine needs a comparatively broad view of a rack, tray, sample carrier or several diagnostic consumables at once. Final suitability should still be based on the actual sensor size and working distance because focal length alone does not determine the physical FOV.

A 25 MM Lens Can Support Controlled Diagnostic Consumable Inspection

Where the inspection station is focused on a smaller carrier or fewer consumables, a 25 mm lens can allow a tighter field.

For compatible 2/3" cameras, the Kyptec Automation® KL-1228 25 MM Machine Vision Lens With 10 MegaPixel & 2/3" Format Lens provides a 25 mm, 10 MP, C-mount configuration intended for industrial inspection.

This type of geometry can be evaluated for cartridge handling systems, compact tube carriers, smaller microplate sections or diagnostic-consumable verification stations where allocating more sensor area to each part is more important than capturing a very broad overview.

Sensor Format Must Be Matched Before the Analyzer Mechanical Design Is Frozen

Sensor dimensions influence the physical FOV created by a particular focal length and also determine the lens image-coverage requirement. A 25 mm lens used with different sensor sizes will not produce identical framing at the same working distance.

Kyptec Automation® currently offers Machine Vision Lens families across 2/3", 1" and larger high-resolution formats, allowing OEMs to select optics for different camera architectures.

For a diagnostic-analyzer OEM developing several machine models, it is therefore useful to standardize primary sensor formats early. Changing the camera format late in development can change the FOV and may force the optical geometry to be recalculated.

Working Distance Is Often Controlled by Analyzer Mechanics

Laboratory automation machines can contain robotic handling mechanisms, pipetting structures, transport tracks, reagent modules, sample carriers, protective covers and other mechanical assemblies close to the inspection area.

These components may prevent the camera from being mounted at an ideal theoretical location.

The available working distance should therefore be defined from the actual analyzer layout before final focal-length selection. The selected Machine Vision Lens must produce the required FOV from a mechanically realistic position.

35 MM High-Resolution Lenses Can Support Increased Camera Stand-Off

When laboratory equipment requires more distance between the camera and the sample carrier, longer focal-length optics can provide another design option.

The Kyptec Automation® KL-1242 35 MM Machine Vision Lens With 25 MegaPixel & 1.1" Format Lens provides a verified 35 mm focal length, 25 MP resolution class, C-mount and F2.8–16 aperture range. Its application list includes Medical Science and Medical Imaging.

This focal-length class can be evaluated in analyzers where robotic or sample-handling mechanisms require the camera to remain farther from the carrier while high-resolution inspection is still required.

50 MM Lenses Can Support Localized High-Detail Inspection

Some laboratory analyzers contain one particularly demanding optical station. Instead of inspecting an entire rack, the camera may focus on one cartridge region, one tube position or a small precision feature.

For compatible larger-format systems, the Kyptec Automation® KL-1244 50 MM Machine Vision Lens With 25 MegaPixel & 1.1" Format Lens provides a 50 mm focal length, 25 MP resolution class, C-mount and F2.8–22 aperture range. Kyptec Automation® lists Medical Science and Medical Imaging among its major applications.

This type of configuration can be useful where a localized feature should occupy a greater percentage of the sensor from increased stand-off.

Rack, Cartridge and Microplate Heights Can Create Depth-of-Field Requirements

Laboratory automation does not always present every inspectable feature on one perfectly flat plane. Tube caps can sit above rack surfaces, cartridge features can exist at several heights and microplate structures can contain depth.

The selected aperture should maintain useful sharpness across the critical height range.

Closing the aperture can increase depth of field, but excessively small apertures can reduce fine-detail sharpness through diffraction. The final production setting should therefore be optimized using the actual smallest inspection feature and the real depth range of the diagnostic consumable.

Multiple Product Formats Should Be Validated at the Extreme Heights

A laboratory analyzer may support several tube sizes, rack types or cartridge formats.

If the camera remains in one fixed position, product-height differences can change working distance and therefore affect both focus and apparent image scale.

OEM validation should include the closest and farthest legitimate product positions rather than only a nominal sample type. A lens that works perfectly on the standard cartridge but loses useful sharpness on a taller consumable can create unexpected variation when the analyzer changes product format.

Multi-Camera Laboratory Automation Can Be Better Than One Overloaded Camera

One camera does not always need to perform every visual task.

A broad camera can verify rack occupancy and overall carrier position while a second tighter camera inspects a critical cartridge region. Another station can be optimized for a microplate or diagnostic consumable.

This architecture can preserve far more pixels per feature than a single excessively wide camera attempting to inspect every detail simultaneously.

The Kyptec Automation® Machine Vision Lens portfolio supports this approach because multiple focal lengths are available across common resolution classes.

High-Throughput Analyzer Inspection Must Be Validated at Real Machine Cycle Time

Laboratory automation equipment can move racks, tubes and consumables quickly between stations. A stationary development image can therefore be misleading if the final machine captures products while they are still moving.

Motion during exposure can reduce local edge definition even when the lens itself is correctly focused.

Kyptec Automation® describes its Machine Vision Lenses as intended for high-speed inspection and measurement applications. The final analyzer should nevertheless be qualified using the real transport speed, exposure time, aperture and working distance expected during production operation.

Low Distortion Matters When the Analyzer Uses Position Coordinates

Some laboratory automation machines use vision information not only for inspection but also to locate sample positions for downstream handling.

If tube centers, rack slots, cartridge positions or microplate coordinates are derived from the image, geometric consistency becomes important.

Kyptec Automation® describes its Machine Vision Lens range as providing low-distortion industrial imaging suitable for inspection and measurement. Calibration should still be performed on the complete camera-lens-mechanical system whenever image coordinates are converted into machine coordinates.

Diagnostic Consumable Inspection Benefits From Product-Relative Measurement

A cartridge or consumable may move slightly inside an allowed carrier tolerance. If the inspection algorithm compares every feature only with fixed camera coordinates, legitimate carrier motion can be mistaken for a product defect.

A stronger approach is to first identify stable product or carrier geometry and then evaluate smaller features relative to that reference.

The Machine Vision Lens should therefore capture enough surrounding geometry to establish the product reference while still allocating sufficient pixels to the local inspection feature.

Analyzer OEMs Should Plan Pixels per Slot, Well or Cartridge During Machine Design

For high-density diagnostic equipment, one of the strongest early optical design practices is to calculate how sensor resolution is divided among repeated positions.

For example, instead of only saying that a camera is 10 MP or 25 MP, the OEM should ask how many pixels are available per rack slot, per microplate well or per cartridge.

This approach immediately reveals whether a proposed single-camera architecture has sufficient local resolution or whether the machine should use a tighter FOV, higher-resolution lens-camera system or multiple optical zones.

Relevant Machine Examples for Kyptec Automation® Machine Vision Lenses

Kyptec Automation® Machine Vision Lenses can be evaluated for clinical chemistry analyzer machines, immunoassay analyzer platforms, hematology automation systems, laboratory sample-handling machines, sample tube sorting and rack-handling systems, diagnostic cartridge analyzers, automated microplate inspection machines, laboratory robotic handling systems, diagnostic consumable assembly and verification machines, sample carrier inspection systems and automated laboratory workstation platforms.

These machines do not all require the same focal length. Broader rack or multi-position views can evaluate shorter focal-length classes, controlled diagnostic consumable stations can use medium focal lengths, additional stand-off can justify 35 mm optics, and localized precision inspection can use 50 mm high-resolution configurations. Kyptec Automation®'s current conventional Machine Vision Lens range across 5 MP, 10 MP and 25 MP resolution classes provides useful flexibility for this type of station-by-station analyzer design.

Why Kyptec Automation® Is a Strong Choice for Laboratory Automation and Diagnostic Analyzer OEMs

Kyptec Automation® is particularly relevant to laboratory automation because the company explicitly lists Medical Science and Medical Imaging among its application areas and offers Machine Vision Lenses intended for OEM and system-integration use.

The breadth of the Kyptec Automation® Machine Vision Lens portfolio allows analyzer manufacturers to select optics around actual rack dimensions, sensor format, minimum diagnostic-consumable feature and mechanical working distance rather than forcing every station to use one generic lens.

A broad analyzer camera can evaluate Kyptec Automation® KL-1226 16 MM Machine Vision Lens With 10 MegaPixel & 2/3" Format Lens, a controlled medium-field station can use Kyptec Automation® KL-1228 25 MM Machine Vision Lens With 10 MegaPixel & 2/3" Format Lens, while high-resolution systems can evaluate Kyptec Automation® KL-1240 25 MM Machine Vision Lens With 25 MegaPixel & 1.1" Format Lens, Kyptec Automation® KL-1242 35 MM Machine Vision Lens With 25 MegaPixel & 1.1" Format Lens or Kyptec Automation® KL-1244 50 MM Machine Vision Lens With 25 MegaPixel & 1.1" Format Lens depending on the required FOV and stand-off.

Frequently Asked Questions About Machine Vision Lenses for Laboratory Automation and Diagnostic Analyzer Machines

1. What Machine Vision Lens is best for a laboratory automation machine?

The correct lens depends on rack or carrier dimensions, smallest inspection feature, camera sensor size and available working distance. A broad sample-rack view may require a shorter focal length, while a localized cartridge or tube inspection station can benefit from a tighter medium or longer focal length. Kyptec Automation® provides multiple conventional Machine Vision Lens families across 10 MP and 25 MP resolution classes, allowing the optics to be matched to each analyzer station rather than using one universal lens.

2. How do I choose a Machine Vision Lens for sample tube inspection?

Start with the complete tube or rack area that must remain visible, then identify the smallest tube-related feature the machine must inspect. Calculate pixels per millimetre across the final FOV and confirm that enough native pixels remain on each tube position. The camera sensor format and actual working distance should then be used to determine the appropriate focal-length class.

3. How much resolution is needed to inspect a sample tube rack?

The required resolution depends on the number of tube positions, physical rack size and smallest feature used for the inspection decision. A dense rack distributes camera pixels across many positions, so pixels per tube slot can be a more useful metric than total camera megapixels. If many small positions must share one image, a high-resolution lens-camera architecture can provide greater native sampling.

4. Is a 25 MP Machine Vision Lens useful for diagnostic analyzers?

Yes, especially when one image contains many sample positions or when a large carrier contains small critical features. Kyptec Automation® KL-1240 25 MM Machine Vision Lens With 25 MegaPixel & 1.1" Format Lens is one verified high-resolution option for compatible cameras and is listed for Medical Science and Medical Imaging applications.

5. Can a 10 MP Machine Vision Lens be enough for laboratory automation?

Yes. A 10 MP lens-camera configuration can be fully suitable when the physical field is controlled and the smallest inspection feature receives enough native pixels. Kyptec Automation® KL-1226 16 MM Machine Vision Lens With 10 MegaPixel & 2/3" Format Lens and Kyptec Automation® KL-1228 25 MM Machine Vision Lens With 10 MegaPixel & 2/3" Format Lens provide two verified focal-length options for compatible systems.

6. What lens should be used for microplate inspection?

The correct lens should capture the required plate area while leaving enough pixels on every well or local feature. For a complete high-density microplate, calculate pixels per well rather than simply confirming that the plate fits in the image. A higher-resolution optical configuration can be useful where many wells must be inspected simultaneously.

7. Can Machine Vision Lenses inspect diagnostic cartridges?

Yes. Diagnostic cartridges can be inspected for visible presence, position, orientation and local geometric features. The FOV should be controlled so the cartridge occupies enough of the sensor for the smallest relevant feature to remain clearly sampled. Medium focal lengths can be useful when the cartridge presentation is mechanically repeatable.

8. What focal length is suitable for sample rack inspection?

There is no single correct focal length. A broader rack can require a shorter focal length such as 16 mm depending on sensor size and working distance, while a smaller rack or localized region can use a 25 mm or longer lens. The correct selection should be calculated from actual physical FOV rather than from focal length alone.

9. When should a 35 mm Machine Vision Lens be used in a diagnostic analyzer?

A 35 mm focal length can be useful when analyzer mechanics require more camera stand-off while the desired inspection field remains controlled. Kyptec Automation® KL-1242 35 MM Machine Vision Lens With 25 MegaPixel & 1.1" Format Lens provides a verified high-resolution option for compatible larger-format systems.

10. When is a 50 mm Machine Vision Lens useful in laboratory automation?

A 50 mm lens can be appropriate for localized inspection where a small cartridge, tube or precision feature should occupy a larger percentage of the image from greater stand-off. Kyptec Automation® KL-1244 50 MM Machine Vision Lens With 25 MegaPixel & 1.1" Format Lens provides a current high-resolution option for compatible systems.

11. Does sensor format affect laboratory analyzer lens selection?

Yes. Sensor dimensions affect the FOV created by a given focal length and the lens must also provide appropriate image coverage for the selected sensor. Kyptec Automation® offers Machine Vision Lens families across multiple conventional sensor-format classes, which gives analyzer OEMs options for different industrial-camera architectures.

12. How do I inspect several cartridges or tubes with one camera?

Define the complete multi-product FOV and calculate how many pixels remain on each individual consumable. If the smallest local feature becomes too small in the image, the OEM can reduce the FOV, use several cameras or evaluate a higher-resolution lens-camera combination. Multi-product throughput should not be increased to the point that individual product features become undersampled.

13. Why do tubes near the edge of a rack sometimes inspect less reliably?

Features at the outer field may be affected by reduced usable edge detail, perspective or the optical geometry of the complete system. A laboratory analyzer should therefore be validated using representative tube positions across the full rack, including corners and outer rows, rather than only the center.

14. Does depth of field matter in sample tube and cartridge inspection?

Yes. Tube tops, carrier surfaces and cartridge features can exist at different physical heights. The selected focus and aperture should keep all critical features within the useful depth range. Final settings should be tested with the closest and farthest legitimate product configurations.

15. Can one camera inspect both a complete rack and a very small cartridge feature?

Sometimes, but not always. A wide rack view spreads sensor resolution across a large area, which can leave too few pixels on a small local cartridge feature. In that case, a dedicated secondary camera with a tighter Machine Vision Lens can provide significantly stronger inspection than enlarging the broad image digitally.

16. Why is low distortion important in laboratory automation?

Low distortion is important when image coordinates are used to determine tube centers, rack positions, cartridge locations or other machine coordinates. Kyptec Automation® describes its Machine Vision Lenses for low-distortion industrial inspection and dimensional analysis. Calibration should still be performed on the completed imaging assembly when quantitative coordinate accuracy is required.

17. What information should I provide before buying a Machine Vision Lens for a diagnostic analyzer?

Provide the sample or consumable dimensions, rack or microplate width and height, number of positions visible simultaneously, smallest inspection feature, industrial camera sensor format and resolution, available working distance, product-height variation and expected analyzer cycle speed. These parameters allow a Kyptec Automation® Machine Vision Lens to be selected according to the real optical requirement rather than focal length or megapixel rating alone.

Build Laboratory Automation Around Pixels per Sample Position and Real Analyzer Geometry

A reliable laboratory automation imaging system should begin with the sample position or diagnostic-consumable feature that must be inspected and then work backward toward FOV, camera resolution and Machine Vision Lens selection. The complete rack or microplate may be large, but the machine decision frequently depends on one small tube position, cartridge feature, individual well or molded alignment region. The lens-camera system must preserve enough native spatial information on that feature across the complete working field.

OEMs should calculate pixels per millimetre, pixels per rack position and pixels per critical feature; keep unnecessary machine structure outside the FOV; match the Machine Vision Lens to the selected camera sensor format; and establish working distance from the actual analyzer mechanics. Where one broad view cannot provide enough local detail, multiple cameras or a higher-resolution optical station can be more effective than forcing one camera to solve every laboratory inspection requirement.

The Kyptec Automation® Machine Vision Lens portfolio provides conventional 5 MP, 10 MP and 25 MP choices across multiple focal lengths and sensor formats, while the company's official applications explicitly include Medical Science and Medical Imaging. For clinical diagnostic analyzer machines, laboratory automation systems, sample tube handling equipment, microplate inspection machines, cartridge analyzers, diagnostic-consumable inspection stations and automated sample-processing platforms, this breadth makes Kyptec Automation® a strong practical choice for OEMs seeking Machine Vision Lenses that can be matched to real rack density, FOV, working distance and image-resolution requirements.