Photovoltaic marks: a1300 nm capture reveals a reference cross
In the real source comparison, the850 nm image emphasizes repeated conductor detail while the1300 nm image makes a reference cross easier to distinguish. Wavelength selection changes which feature supplies the useful contrast.
Choose the spectral band for the mark you need to locate.
Real camera capture
- Proposed light housing (spec)162 × 22 × 36 mm
- EvidenceReal application-lab captures
- Camera (proposed)1280 × 1024 InGaAs
- Scene field100 × 80 mm scene framing only; illustrative, not a printed lens field
Lighting application-lab image sheet
What the camera saw
Cropped from the source test sheet; original test annotations are retained. Captures are not generated or enhanced. Drag a comparison slider, or open any image full size.
SWIR1300 nm: Source1300 nm capture: the reference cross is visible inside the original red circle.
The challenge
Surface patterns can obscure a reference mark needed for alignment. Adding pixels alone does not help if the mark and its surroundings have similar contrast.
How it was solved
The source labels NIR850 nm and SWIR1300 nm but does not identify its camera, lens or exact light model. The selected camera, SWIR lens and two1300 nm bars are proposed components.
The scene illustrates reflected-light bench illumination. Its100 ×80 mm framing and400 mm lens-front distance are illustrative and are not claimed as the source field or a printed magnification pair.
Why it works
- 1
Different materials and layers return different relative signals as wavelength changes.
- 2
The source shows one mark-visibility comparison. It does not establish alignment accuracy, defect detection or performance across all cell materials and coatings.
Lighting application-lab image sheet
Evidence you can inspect
The source1300 nm capture has a distinguishable cross-shaped mark, unlike the conductor-dominated850 nm capture.
Only the two wavelengths and the photovoltaic-mark application are stated; no complete tested system or alignment precision is given.
An application-lab lighting demonstration, not a customer deployment or a qualified production inspection. Proposed camera, lens, fixture and scene spacing require a fresh trial. Source observations do not establish a defect-size limit, accuracy guarantee or production false-call rate.
From image contrast to a production decision
What to validate on your part
- 01
Confirm the relevant layer
Identify the physical reference mark and material stack used for the real alignment task.
- 02
Trial the proposed optics
Capture the same samples at the selected1300 nm band with the proposed camera, lens and light arrangement.
- 03
Measure localization
Calibrate and test repeated mark-centre location across part pose, coating and process variation.
From the demo to your test bench
Parts in this setup
LightOur pick
LS-4BRH15016-SWIR
Short wavelength infrared light, 162 x 22 x 36 mm (LS-4BRH15016-SWIR)
Two proposed SWIR bars for a reflected-light trial. Each162 ×22 ×36 mm with150 ×16 mm emitting area; source exact light model is not given.Wavelength: 1300 nm proposed, matching the labelled source band
Configuration to confirm
In proposed setup · quantity 2
CameraOur pick
MV-CI013-GS-NN
Hikrobot MV-CI013-GS-NN 1.3MP SWIR Camera, IMX990, GigE, fanless
Proposed Hikrobot InGaAs camera: 1280 × 1024, 5 µm pixels, C-mount and specified spectral response 0.4–1.7 µm. The source does not identify its camera.
Price on request
In proposed setup
LensOur pick
LS-KF2514M-5MP-NIR-V2
25mm, F1.4, 1", 900-1700nm, C-mount, SWIR lens (LS-KF2514M-5MP-NIR-V2)
25 mm F1.4 SWIR lens, C-mount, coating specified for 900–1700 nm. Printed minimum object distance is 0.38 m; the proposed scene uses 400 mm from the lens front. Its field and spacing are illustrative, not a claimed printed magnification/working-distance pair.
$449.00
In proposed setup
Camera test stationOur pick
LS-BT-XZ-G-8-6045
Camera stand with XZ adjustment and glass tray, height 800 mm (LS-BT-XZ-G-8-6045)
800 mm column, 600 × 450 mm breadboard, glass tray and two lighting holders. Proposed bench fixture; actual load, travel, clamps, mounting fasteners and light clearance must be confirmed.
$359.00
In proposed setup
"Tested" identifies the part named in the source. "Our pick" is a proposed alternative or supporting part. Confirm colour, optics, controllers, power supplies, cables and mounting before ordering.
The set-up
| Source camera | Not identified in the source sheet |
|---|---|
| Camera and lens | Proposed catalog components |
| Scene field | 100 × 80 mm scene framing only; illustrative, not a printed lens field |
| Lens-to-part in proposed scene | 400 mm; illustrative spacing above printed minimum object distance |
| Mounting (proposed) | LS-BT-XZ-G-8-6045 · catalog test station with two lighting holders |
Mount the optics with intent
The station is an optical test bench, with its two lighting holders included in the catalog listing. The 3D column and base follow the published height and footprint. Carriages, clamps and part supports are schematic: confirm camera screw pattern, lens support, light fasteners, permissible load and actual travel before ordering.
Complete the electrical system
Select a controller against the exact light voltage, drive mode and power, then confirm camera data/power/I/O cables and a suitable PC. These are not silently added to the proposed optical kit.
Build this system
Start from this setup, adapt it to your part.
The configurator opens with this study's camera, lens, light and station picked. Swap any part, check fit and price, then buy or ask for a quote.
Camera and available lens CAD are published models. Light envelopes and the station base/height use printed dimensions. Part shapes, brackets, holders, shielding and spacing are illustrative; they are not reconstructions of a source part or a complete mechanically validated assembly. Light paths explain the proposed arrangement and do not simulate optical performance. The SWIR scene field is illustrative; no measured field or printed magnification/working-distance relationship is asserted. Purple is a display convention for invisible illumination.
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Make the next trial specific.
Tell us the part size, smallest defect or tolerance, available working distance, material and line speed. Include what a good part and a reject look like.
About this case study: the photos and camera images come from the application laboratory of the maker of the lighting and optics we sell, imaged on the parts shown; your results depend on your part, camera and set-up. This is an application-lab study, not a LumaSpec customer deployment. Source figures are reported results; proposed components require a fresh trial. The 3D scene illustrates the arrangement and does not simulate imaging performance.