Fabric-covered fasteners: use transmitted infrared to reveal the metal
The real near-infrared capture separates repeated metal fastening loops from the surrounding fabric. The optical lesson is wavelength-dependent transmission, not a claim that infrared reveals every fabric-covered part.
Choose wavelength from the actual textile and hardware combination.
Real camera capture
- Proposed light housing (spec)114 × 114 × 17 mm
- EvidenceReal application-lab captures
- Camera (proposed)1280 × 1024 InGaAs
- Scene field100 × 80 mm scene framing only; illustrative, not a printed lens field
Explore it in 3D
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.
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.
The challenge
Fabric colour, weave and coatings can hide a fastener under visible illumination. The metal and textile may become easier to distinguish at another wavelength.
How it was solved
The source names LS-RNG-0558 but does not state whether its offered850 or940 nm configuration was used. The proposed kit explicitly selects940 nm for a fresh trial; that choice is not a source-tested wavelength.
The proposed InGaAs camera and900–1700 nm lens cover940 nm. This is a spectrally supported bench proposal, with illustrative framing and no source-camera identification.
Why it works
- 1
A textile and metal fastener can transmit or block infrared differently, giving the repeated hardware a distinguishable outline.
- 2
Transmission depends on the real material, thickness and dye. A clear outline does not establish fastening strength or stitch quality.
Lighting application-lab image sheet
Evidence you can inspect
Repeated loop-like metal fasteners are visible against the lighter fabric regions.
The source reports clear fastener imaging under NIR, without its wavelength selection, camera, exposure or minimum feature size.
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
Test each textile
Include real dyes, weaves, coatings, thicknesses and accepted fastener positions.
- 02
Compare the wavelength
Confirm the chosen940 nm configuration and compare another supported band if contrast is insufficient.
- 03
Validate the visual task
Measure presence/location performance on known good and missing/displaced fasteners, without inferring mechanical strength.
From the demo to your test bench
Parts in this setup
LightOur pick
LS-RNG-0558
Infrared light, power 7.7 W (LS-RNG-0558)
Exact source base family, but its tested wavelength is unspecified. Proposed940 nm configuration: 114 × 114 × 17 mm housing,100 ×100 mm emitting area.Wavelength: 940 nm proposed; source does not specify whether850 or940 nm was used
Configuration to confirm
In proposed setup
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.Not available in the United States. Available for delivery to other countries.
Price on request
In proposed setup
LensOur pick
LS-FFL-1542
25mm, F1.4, 1", 900-1700nm, C-mount, SWIR lens (LS-FFL-1542)
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-MNT-0101
Camera stand with XZ adjustment and glass tray, height 800 mm (LS-MNT-0101)
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.
$629.00
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-MNT-0101 · 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.
Textiles, film and web
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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.