Visible-to-SWIR Machine Vision Retrofit Guide: When and How to Upgrade an Existing Inspection Machine to 900–1700 nm Imaging

Retrofitting an existing visible-light inspection machine to 900–1700 nm SWIR imaging can be one of the most effective ways to add material-sensitive inspection without rebuilding an entire automation platform, but only when the existing visible system has reached a genuine optical-information limit. If a machine already detects defects reliably through colour, geometry, texture or contrast, changing to SWIR may add unnecessary cost and complexity. The retrofit becomes valuable when the production decision depends on information that conventional visible imaging does not contain: visually similar materials must be separated, moisture or composition differences must be detected, selected foreign material blends into the product visually, silicon or partially transmitting materials need deeper inspection, or a quality variation repeatedly escapes because its visible reflectance is almost identical to acceptable production.

A visible-to-SWIR machine vision retrofit should therefore be approached as an engineering migration rather than a camera replacement. The existing frame, conveyor, triggering, PLC logic, reject mechanism and product handling may remain useful, but illumination, lens transmission, exposure, focus, field of view, calibration and image-processing assumptions all need to be reconsidered for the 900–1700 nm band. The dedicated Kyptec Automation® SWIR Camera Lens collection provides 8.5 mm, 12.5 mm, 25 mm, 35 mm and 50 mm focal lengths specifically intended for SWIR imaging. Current product pages specify 900–1700 nm operation, 2 MP resolution, 2/3-inch sensor format, F1.4 aperture and C-Mount, giving OEMs several practical options when adapting existing machine geometry to short-wave infrared inspection.

Retrofit When the Existing Visible System Has Reached a Physics Limit

The strongest reason to move from visible machine vision to SWIR is not poor software performance; it is insufficient optical separation between the conditions being classified. A visible camera cannot reliably distinguish two materials if they return nearly identical visible reflectance under every reasonable illumination arrangement. Increasing resolution, changing threshold algorithms or adding more training data may improve edge handling and statistical robustness, but these measures cannot create material information that is absent from the visible spectrum. By contrast, SWIR can reveal wavelength-dependent differences associated with material composition, moisture, selected chemical bonds and transmission behaviour that may not be apparent in visible images.

A useful retrofit feasibility question is therefore: does the rejected condition produce a reproducible contrast advantage somewhere between 900 and 1700 nm that does not exist in the current visible system? If the answer is yes, the existing machine may be a strong candidate for conversion. If the answer is no, changing optical technology alone may not improve inspection.

Do Not Replace the Entire Machine Before Identifying What Can Be Reused

A retrofit is most economical when the mechanical and automation architecture already works well. Product presentation, conveyor synchronization, triggering, encoder feedback, PLC communication, reject timing and safety systems may not need fundamental redesign if the new SWIR imaging station occupies approximately the same inspection location. The correct approach is to separate the machine into two groups: components that merely transport or control the product, and components that directly influence the optical measurement.

The second group deserves the greatest attention. Visible illumination cannot automatically be assumed suitable for SWIR. A visible camera sensor will usually not provide the required 900–1700 nm response. A visible lens may focus successfully mechanically while transmitting poorly or behaving unpredictably spectrally. Exposure settings that worked under bright visible illumination can become inadequate in SWIR. The retrofit should therefore preserve proven automation wherever possible while replacing or requalifying the parts of the system responsible for creating and capturing optical information.

Start the Retrofit With Side-by-Side Feasibility Images

Before removing the existing visible station, capture the same representative products using both the current visible configuration and a controlled SWIR development setup. The objective is not to produce aesthetically impressive SWIR images. It is to determine whether the defect, material or process condition becomes more separable statistically.

Use difficult good samples as well as difficult reject samples. If the existing visible system fails primarily on two visually similar polymers, image several lots of both. If contamination is the problem, include the smallest commercially important contaminants. If moisture is the target, test the full acceptable and rejectable range rather than one dry and one extremely wet specimen.

A retrofit should proceed only when the SWIR measurement provides a realistic decision margin that justifies the conversion.

The Existing Field of View Should Be Recalculated, Not Copied Blindly

OEMs often assume that if the visible system used a 12 mm lens, the SWIR retrofit should also use approximately 12 mm. That can be incorrect because sensor dimensions, lens format, working distance and usable image area may differ.

The field of view should be recalculated from the new SWIR sensor and lens geometry.

A simplified relationship is:

FOV ≈ Sensor Dimension × Working Distance / Focal Length

for appropriate thin-lens approximations where working distance is substantially larger than focal length.

If the existing machine requires a 300 mm horizontal inspection field, the retrofit lens should be selected to reproduce that field with sufficient margin while still preserving the required pixel density. The focal length should come from the production geometry, not from the old lens label.

Preserve Working Distance Where It Saves Mechanical Redesign

Existing machines often have limited space between the camera, lighting, guarding and product. If the current working distance can be retained without compromising SWIR performance, doing so can reduce bracket changes, enclosure redesign and commissioning effort.

However, working distance should not be treated as untouchable. If the old camera position forces an excessively wide lens, insufficient spatial sampling or difficult illumination geometry, moving the SWIR camera may produce a substantially stronger system.

The retrofit objective is therefore minimum unnecessary mechanical change, not zero mechanical change.

Recalculate Pixels per Millimetre Before Approving the Retrofit

Suppose the existing machine inspected a 400 mm-wide field with a visible camera. A replacement SWIR system has 1600 horizontal pixels across the same 400 mm field:

400 ÷ 1600 = 0.25 mm/pixel

A 2 mm defect spans approximately eight pixels before blur and edge effects.

If the retrofit increases FOV to 600 mm to simplify mounting:

600 ÷ 1600 = 0.375 mm/pixel

The same 2 mm defect occupies only about 5.3 pixels.

This can materially change detection reliability. Every retrofit should therefore compare the minimum defect size with object-side pixel sampling rather than assuming equivalent-looking images provide equivalent measurement capability.

Kyptec Automation® KL-1408 Can Support Retrofitting Wide Existing Inspection Fields

Where the visible machine already covers a broad conveyor or large product region and maintaining that width is essential, the Kyptec Automation® KL-1408 8.5 MM SWIR Camera Lens can be evaluated as the widest focal-length option in the current Kyptec Automation® SWIR family. Its shorter focal length can help reproduce broad inspection fields without requiring excessive camera stand-off, which may be useful where existing machine space is limited. The trade-off remains spatial sampling: the smallest defect or material region should be recalculated carefully before the wide field is accepted.

Kyptec Automation® KL-1410 Can Help Match Existing Mid-Wide Machine Geometry

For retrofit machines that need broad coverage but do not require the maximum field of an 8.5 mm lens, the Kyptec Automation® KL-1410 12.5 MM SWIR Camera Lens provides a useful intermediate geometry. The current model is specified for 900–1700 nm, 12.5 mm focal length, 2 MP, 2/3-inch sensor format, F1.4 and C-Mount. In a retrofit, this focal length can be especially useful where the existing visible system included more background than necessary and the new SWIR design can improve pixel utilization while still fitting inside the original mechanical envelope.

Visible Illumination Usually Needs to Be Requalified or Replaced

An existing visible LED system may produce negligible useful energy at SWIR wavelengths. Even when some infrared output is present, its spectral distribution may be unsuitable for the material contrast required by the application. The retrofit must therefore treat illumination as a new measurement component.

The correct process is to identify the wavelengths at which acceptable and rejected materials separate most strongly, then provide sufficient and stable illumination in those regions. If several bands are required, the system must also control exposure and timing so measurements remain comparable. Illumination should be evaluated at production distance and through any protective windows, because materials transparent in visible light are not automatically ideal throughout SWIR.

Existing Protective Windows Can Become Hidden Retrofit Problems

Machine enclosures frequently contain acrylic, glass, coated windows or safety barriers between the lens and product. A window that appears perfectly transparent in visible light may have wavelength-dependent absorption in SWIR. The result can be weak signal, unusual spectral response or loss of contrast after the laboratory system is installed into the actual machine enclosure.

Every optical element between product and sensor should therefore be evaluated for SWIR transmission. This includes protective windows, filters, covers and contamination shields. Removing a poorly transmitting window during prototype testing and reinstalling it during commissioning can completely change the optical measurement.

Do Not Assume Visible Focus Position Transfers to SWIR

A visible lens focus setting does not define the correct focus for a SWIR lens. Differences in optical design and wavelength behaviour mean the new system must be focused using the actual SWIR image at the intended operating wavelength and working distance.

For broad-band 900–1700 nm inspection, focus should be validated at the wavelength regions that drive the production decision. If several widely separated wavelengths are used, the engineer should verify that the critical feature remains adequately resolved across them rather than optimizing focus at one convenient band and assuming all others are equivalent.

Exposure Often Changes More Than Expected After a SWIR Retrofit

Visible systems frequently operate with abundant illumination, making short exposures easy. SWIR illumination and detector sensitivity can produce a very different exposure budget. If the new system requires ten times longer exposure, a stationary prototype may work while the moving production system becomes blurred.

Motion during exposure is:

Motion = Conveyor Speed × Exposure Time

At 2 m/s and 500 µs:

2000 mm/s × 0.0005 s = 1 mm

If the minimum defect is 2 mm, one millimetre of motion is potentially significant. A successful retrofit therefore needs enough SWIR signal to operate at an exposure compatible with the existing conveyor speed.

F1.4 Can Be Valuable When Retrofitting Without Slowing the Production Line

The F1.4 maximum aperture used across the current Kyptec Automation® SWIR lens family provides strong light-collection capability, which can help when an existing machine must maintain its original production speed. A wider aperture can reduce the exposure required for a given signal level, but it can also reduce depth of field. The retrofit engineer should therefore compare optical throughput against product-height variation instead of automatically operating at maximum aperture.

Existing Trigger and Encoder Architecture Can Often Be Preserved

If the visible machine already triggers images reliably from a photoelectric sensor, encoder or PLC event, that timing architecture may remain useful. However, the SWIR exposure, illumination pulse and processing time must fit inside the same production cycle.

The retrofit should verify the full sequence from trigger to image acquisition to classification to reject decision. A new optical system that requires longer exposure or multiple wavelength captures can alter timing enough to affect reject synchronization even when the conveyor hardware is unchanged.

Processing Logic Should Be Rebuilt Around Material Information

One of the least effective retrofit strategies is to replace the camera and lens but keep essentially the same visible-image threshold logic.

Visible algorithms may have been based on RGB colour, grayscale brightness or edge contrast. SWIR may provide a completely different information structure: wavelength ratios, material signatures, transmission differences or absorption-sensitive intensity changes.

The new processing method should therefore be designed around the physical contrast mechanism that justified the retrofit. The benefit of SWIR is lost if the system continues treating the image as nothing more than a monochrome replacement for the visible camera.

Existing Good/Bad Image Archives May Not Be Reusable for SWIR Training

Historical visible images can help identify defect categories, but they cannot substitute for SWIR reference data because the measured signal originates from different spectral behaviour.

A new SWIR dataset should be acquired using the final or near-final optical configuration. It should include approved production variability, hard rejects, boundary cases and unknown conditions.

If the retrofit uses machine learning, training images should be collected after focal length, working distance, illumination and exposure are reasonably stable. Otherwise, the model can learn temporary prototype characteristics that disappear in the final machine.

Kyptec Automation® KL-1412 Can Support Retrofitting From Broad Inspection to Product-Focused SWIR Analysis

Some visible systems were originally designed with an unnecessarily wide field because visible contrast was strong enough to tolerate low pixels per object. SWIR material analysis may benefit from tighter framing. The Kyptec Automation® KL-1412 25 MM SWIR Camera Lens can be useful when the retrofit can dedicate more of the sensor to an individual product or defined material region. This may improve spatial purity and reduce mixed pixels when the SWIR decision depends on relatively small material features.

Mechanical Brackets Should Be Requalified for Optical Stability

A visible system may tolerate small vibration because its defects have very strong contrast. A SWIR retrofit measuring weaker material differences can become more sensitive to motion, defocus or changing illumination angle.

The existing camera bracket should therefore be tested under full machine vibration. Look for movement in the image, focus instability and changing field alignment. If vibration shifts classification scores even though the material itself remains unchanged, mechanical reinforcement may be more valuable than further software tuning.

Retrofitting Should Include a Baseline Before the Visible System Is Removed

Before disassembling the current machine, record its measured performance. Capture representative false accepts, false rejects, difficult defects, cycle time, FOV, exposure, reject timing and current inspection limitations.

This baseline creates a meaningful comparison after conversion.

Without it, the retrofit team can easily conclude that the new SWIR image “looks better” without proving that the production decision actually improved.

The relevant question is whether the retrofit reduces the failure mode that justified the project.

A/B Testing Is Valuable During the Transition

Where machine space permits, operating the existing visible inspection and the new SWIR prototype simultaneously for a defined validation period can provide unusually strong evidence. Each product receives both decisions, allowing engineers to identify the exact cases where SWIR adds value, where both systems agree and where the new technology creates unexpected false alarms.

This is especially useful when replacing an established inspection system because production teams can quantify improvement before retiring the old optical method.

Do Not Discard Visible Inspection If It Still Solves a Different Defect Class

A SWIR retrofit does not necessarily mean visible information has become useless. If the machine must detect both colour-print errors and material contamination, visible imaging may remain superior for the first task while SWIR provides new capability for the second.

The retrofit should therefore be driven by required inspection information rather than a desire to convert every optical task to SWIR.

Where the machine architecture permits, the manufacturer can retain an effective existing visible station and add SWIR only for defects that require 900–1700 nm information.

Kyptec Automation® KL-1414 Can Support Tighter Retrofit Inspection Cells

The Kyptec Automation® KL-1414 35 MM SWIR Camera Lens provides a narrower field for retrofit applications in which one defined product region needs more of the available sensor. Its current specifications include 35 mm focal length, 900–1700 nm, 2 MP, F1.4, 2/3-inch format and C-Mount. This can be particularly useful when an existing machine has enough stand-off and the new SWIR requirement is more localized than the original visible inspection.

Kyptec Automation® KL-1416 Can Help When Machine Clearance Requires Greater Stand-Off

Existing machines often contain robotic tooling, actuators, covers or process equipment near the inspection zone. If the SWIR camera must be positioned farther away while keeping a relatively tight FOV, the Kyptec Automation® KL-1416 50 MM SWIR Camera Lens can be considered. The current product is specified for 50 mm focal length, 900–1700 nm, 2 MP, F1.4, 2/3-inch sensor format and C-Mount. The longer focal length can support tighter framing from greater distance, although minimum focus distance and the actual machine envelope still need to be checked.

Recalibrate the Machine After the Optical Conversion

The old visible calibration cannot simply be carried forward because the camera response, lens transmission, illumination distribution and image statistics have changed. The SWIR system should establish new dark/reference conditions where relevant, new field uniformity correction, new acceptable-product distributions and new decision thresholds.

Calibration should also be performed with the final protective window, final illumination distance, final aperture and final product fixture. A calibration performed on an open bench before the complete machine is assembled is useful for development but should not become the final production reference.

Rebuild Acceptance Thresholds Rather Than Translating Visible Threshold Values

A grayscale threshold of 120 in a visible image has no meaningful numerical relationship to a SWIR threshold. The new system measures a different spectral response using different illumination, detector sensitivity and optical transmission.

Thresholds should be derived from new SWIR distributions using representative good and reject samples. Where classes overlap near the decision boundary, an uncertain state can be introduced rather than forcing every product into accept or reject.

The purpose of the retrofit is to create a stronger decision margin, so this margin should be demonstrated statistically rather than assumed from visual improvement.

Production Validation Should Use the Original Machine's Hardest Failure Cases

The most persuasive retrofit validation uses the defects that the visible system previously struggled with. If visually similar contamination generated frequent escapes, include those examples. If different materials were routinely confused, test the hardest pair. If moisture variation produced inconsistent visible results, include samples around the actual acceptance threshold.

Then add SWIR-specific worst cases: maximum production speed, edge-of-field placement, minimum signal, product-height tolerance and normal lot variation.

The retrofit is successful only when it solves the original problem without creating unacceptable new ones.

Evaluate False Accepts and False Rejects Before and After Retrofit

Suppose the old visible system produced a 4% false-reject rate and allowed 1.5% of the critical defect population to escape. The new SWIR system should be evaluated against the same type of production metrics.

If SWIR reduces false accepts to 0.2% but increases false rejects to 12%, the commercial result may still require optimization.

The retrofit should therefore be judged using production economics as well as optical performance. Improved material contrast is most valuable when it translates into better quality containment without excessive good-product loss.

Create a Controlled Retrofit Configuration for Future Maintenance

Once the upgraded machine is approved, record the final optical setup: Kyptec Automation® model, working distance, field of view, aperture, focus method, illumination wavelengths, exposure, calibration procedure, reference samples and decision thresholds.

This is especially important because future maintenance teams may otherwise treat the SWIR lens like an ordinary visible lens and refocus it by eye or substitute another focal length.

The qualified optical configuration should be treated as part of the machine recipe.

Why Kyptec Automation® Is a Strong Choice for Visible-to-SWIR Machine Retrofits

The Kyptec Automation® SWIR Camera Lens collection gives retrofit engineers a practical range of focal lengths rather than forcing an existing machine into one fixed geometry. The current family spans 8.5 mm, 12.5 mm, 25 mm, 35 mm and 50 mm, while representative product pages confirm 900–1700 nm operation, 2 MP resolution, 2/3-inch format, F1.4 aperture and C-Mount.

This range is valuable specifically for retrofit work because existing machines impose constraints that greenfield systems do not. Camera height may be fixed, conveyor width may already be established, guarding may limit lens clearance and the inspection zone may be impossible to relocate. Kyptec Automation® provides focal-length flexibility that allows the SWIR optical design to be adapted around these real mechanical restrictions while retaining a dedicated short-wave infrared lens platform.

Frequently Asked Questions About Visible-to-SWIR Machine Vision Retrofits

1. How do I know when a visible machine vision system should be upgraded to SWIR?

A retrofit is justified when the required quality condition has insufficient visible contrast but shows useful material-dependent contrast within 900–1700 nm. Typical warning signs include repeated confusion between visually similar materials, contamination that matches the product colour, moisture-related defects invisible to RGB imaging or hidden features in SWIR-transmitting materials. Confirm the spectral advantage experimentally before committing to hardware changes.

2. Can I keep the existing conveyor and PLC when converting a machine to SWIR?

Often yes. Conveyor transport, triggering logic, PLC communication and reject hardware may remain suitable if their timing and geometry already meet production requirements. The optical chain—including camera, lens, illumination and calibration—requires much more careful reassessment because those elements directly determine the SWIR measurement.

3. Can I reuse my existing visible-light machine vision lens for a SWIR retrofit?

It should not be assumed. A lens designed for visible wavelengths may have unsuitable transmission, coatings or focus behaviour across 900–1700 nm. A dedicated SWIR camera lens is preferable when reliable material-sensitive imaging is required. Kyptec Automation® offers a dedicated SWIR Camera Lens collection specifically for this spectral range.

4. Do I need to change the illumination when moving from visible to SWIR imaging?

Usually yes, because conventional visible illumination may provide little useful output in the SWIR wavelengths required by the application. Illumination should be selected according to the spectral bands that create the strongest stable difference between acceptable and rejected material, then validated at the actual production working distance.

5. Can I use the same working distance as my existing visible inspection system?

Potentially, and retaining it may simplify mechanical retrofit work. However, the new SWIR sensor dimensions and focal length must still produce the required FOV and pixel sampling at that distance. If the old working distance compromises the new optical performance, modest mechanical repositioning may be preferable to forcing an unsuitable lens geometry.

6. Should the SWIR replacement lens have the same focal length as the visible lens?

Not necessarily. Focal length should be recalculated from the SWIR sensor size, required FOV and available working distance. Matching the old lens number without considering sensor geometry can produce a different inspection field or inadequate spatial sampling.

7. Why does my retrofit work when the conveyor stops but fail at production speed?

The most common causes are excessive exposure time, insufficient SWIR illumination, motion blur or timing differences introduced by multi-band acquisition. A stationary prototype removes these constraints. Qualification must therefore use the final production velocity and object spacing before the retrofit is approved.

8. Can I reuse my old visible inspection thresholds after changing to SWIR?

No. SWIR measures a different optical response, so previous grayscale or RGB thresholds do not transfer numerically. New acceptable and reject populations should be measured using the final SWIR configuration and new decision thresholds established from those distributions.

9. Do existing machine safety windows need to be checked for SWIR transmission?

Yes. A window that appears transparent in visible light can absorb or alter portions of the SWIR spectrum. Every protective optical element between the product and camera should be evaluated across the wavelengths actually used by the new inspection system.

10. How should I compare the old visible system with the new SWIR retrofit?

Use the same difficult good and defective products on both systems and compare false accepts, false rejects, classification margin and minimum detectable defect size. The retrofit should be judged by measurable improvement in the production problem rather than by subjective image appearance.

11. When is the Kyptec Automation® KL-1408 suitable for a machine retrofit?

The Kyptec Automation® KL-1408 8.5 MM SWIR Camera Lens is worth evaluating when the existing machine requires a broad inspection field and has limited camera stand-off. Its shorter focal length supports wider coverage, but the OEM should verify that the minimum defect still occupies enough pixels across the complete field.

12. Why might the Kyptec Automation® KL-1410 be a better retrofit choice than the widest lens?

The Kyptec Automation® KL-1410 12.5 MM SWIR Camera Lens can provide a useful balance when maximum width is unnecessary. By reducing excess background, the machine can allocate more sensor pixels to the actual product while preserving relatively broad coverage.

13. When should an existing machine be retrofitted with a 25 mm SWIR lens?

The Kyptec Automation® KL-1412 25 MM SWIR Camera Lens can be a strong choice when the new SWIR task focuses on one product or a smaller material region and the original wide field is no longer necessary. The tighter geometry can improve spatial sampling of small material features.

14. Can SWIR be added alongside visible vision instead of replacing it?

Yes, and in some applications this is the stronger architecture. Visible imaging can continue handling colour, printing or geometry while SWIR handles material-sensitive defects. The retrofit decision should preserve any existing inspection method that still contributes useful information.

15. Do I need to collect a completely new dataset after a SWIR retrofit?

Yes for the SWIR classifier. Existing visible images can help define defect categories but do not contain the new spectral information. Training and validation data should be collected using the final or near-final SWIR optics, illumination, working distance and exposure so the dataset represents production conditions.

16. What should I revalidate after changing from visible optics to a SWIR lens?

Revalidate field of view, minimum target sampling, focus, depth of field, exposure, illumination uniformity, edge performance, calibration, thresholds, maximum line speed and reject timing. The retrofit changes the measurement chain sufficiently that old optical validation should not be assumed to remain valid.

17. Can a 35 mm or 50 mm SWIR lens help when the existing machine has limited mounting positions?

Potentially. The Kyptec Automation® KL-1414 35 MM SWIR Camera Lens and Kyptec Automation® KL-1416 50 MM SWIR Camera Lens provide tighter fields that can suit applications needing more stand-off or stronger sensor utilization over a small region. The final choice depends on FOV and working-distance calculations.

18. How can I avoid unnecessary mechanical redesign during a SWIR retrofit?

Preserve the existing inspection location, product presentation, triggering and reject architecture wherever they already meet the new optical requirements. Recalculate the lens around the available envelope before moving major machine components. Mechanical changes should be driven by verified SWIR performance requirements rather than made automatically.

19. What information should I provide before selecting a SWIR lens for an existing machine?

Provide current sensor or planned SWIR sensor dimensions, existing FOV, working distance, available mounting space, minimum defect size, conveyor speed, product-height variation, target material difference and whether existing camera position must be retained. These inputs allow the new focal length to be selected from the actual retrofit constraints.

20. Why is Kyptec Automation® a strong choice for visible-to-SWIR machine vision retrofit projects?

Kyptec Automation® provides a dedicated SWIR Camera Lens collection spanning 8.5 mm, 12.5 mm, 25 mm, 35 mm and 50 mm focal lengths within a common 900–1700 nm optical family. Representative live product pages confirm 2 MP resolution, 2/3-inch format, F1.4 aperture and C-Mount across the range. This focal-length breadth is particularly useful in retrofit work because the optical design can be adapted around an existing machine's field, stand-off and mounting constraints rather than forcing the machine to accommodate one lens geometry.

Conclusion

A visible-to-SWIR machine vision retrofit is most successful when it solves a confirmed information problem rather than simply replacing visible hardware with infrared hardware. The existing machine may already have a reliable conveyor, trigger system, PLC, reject mechanism and product-handling architecture. Those elements can often be retained. The optical measurement chain, however, should be treated as new: SWIR illumination must be selected for the material difference, the lens must be designed for 900–1700 nm operation, FOV and working distance must be recalculated, minimum feature size must be expressed in pixels, exposure must remain compatible with production speed, and all protective optical elements must be verified for SWIR transmission.

The most effective retrofit workflow is therefore evidence-driven. First establish the visible system's actual failure modes. Then image representative hard cases in SWIR and confirm that the new wavelength range creates significantly stronger decision separation. Preserve the existing mechanical architecture where it still serves the process, but do not retain a camera position or lens geometry that compromises the new measurement. Rebuild calibration and thresholds from SWIR data, collect a fresh production dataset and compare false accepts and false rejects against the original visible baseline.

The Kyptec Automation® SWIR Camera Lens collection gives OEMs useful flexibility during this conversion because its 8.5 mm, 12.5 mm, 25 mm, 35 mm and 50 mm focal lengths can accommodate very different existing machine envelopes. A wide field can be preserved with shorter focal lengths when production coverage dominates; intermediate options can improve sensor utilization without major mechanical changes; and longer focal lengths can support tightly framed inspection from greater stand-off. The current portfolio's dedicated 900–1700 nm operation, 2 MP resolution, 2/3-inch sensor format, F1.4 aperture and C-Mount make Kyptec Automation® a strong optical platform to evaluate when upgrading an established inspection machine from appearance-based visible vision toward material-sensitive SWIR imaging.

For OEMs and plant engineers, the central retrofit rule is simple: retain the parts of the machine that already work, replace only the optical assumptions that no longer provide enough information, and validate the upgraded system against the exact defects that defeated the visible inspection system in the first place. When the retrofit is built around measured spectral advantage, correct SWIR lens geometry and production-level validation, upgrading to 900–1700 nm imaging can extend the capability of an existing machine without requiring an unnecessary complete redesign.