MV-CI013-GS-NNView part & specifications →Browse camera options →Home / Case studies / Fastener loops beneath fabric in infrared
Application study · Textile assembly and garmentsFabric-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.
- 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
Test stationIncluded light holdersCameraLensLightPartField of view
Drag to rotate · scroll to zoomWalk through this setup 5 guided stops
From component to inspection
Understand each choice.
Choose a stop to frame the part in 3D and see why it belongs in this setup. The component notes and links remain available if 3D cannot load.
Proposed component
MV-CI013-GS-NN
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.
Proposed component
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.
Proposed component
LS-4FT100100-NIR
Exact source base family, but its tested wavelength is unspecified. Proposed940 nm configuration: 114 × 114 × 17 mm housing,100 ×100 mm emitting area.
Proposed component
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.
Inspect the real capture
Follow the contrast to the part.
Choose wavelength from the actual textile and hardware combination.
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.
From the demo to your test benchCameraMV-CI013-GS-NNView part & specifications →Browse camera options → Imaging lens
LS-KF2514M-5MP-NIR-V2View part & specifications →Browse imaging lens options → Inspection light
LS-4FT100100-NIRView part & specifications →Browse inspection light options → Test station & mounts
LS-BT-XZ-G-8-6045View part & specifications →Browse test station & mounts options →
Build around the parts you can buy.
Explore each component, check its specifications and compare alternatives. The proposed quote includes the linked test station; its catalog listing includes two lighting holders.
MV-CI013-GS-NNView part & specifications →Browse camera options →LS-KF2514M-5MP-NIR-V2View part & specifications →Browse imaging lens options →LS-4FT100100-NIRView part & specifications →Browse inspection light options →LS-BT-XZ-G-8-6045View part & specifications →Browse test station & mounts options →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.
Configure the mounting station →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.
Lighting application-lab image sheet
Evidence you can inspect
Visible in the images
Repeated loop-like metal fasteners are visible against the lighter fabric regions.
What the source reports
The source reports clear fastener imaging under NIR, without its wavelength selection, camera, exposure or minimum feature size.
How to use this evidence
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.
What the camera saw
Cropped from the source test sheet; original test annotations are retained. Captures are not generated or enhanced. Drag the comparison slider or use the image buttons.
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-4FT100100-NIR 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.
From image contrast to a production decision
What to validate on your part
A useful sample image is the starting point. These are the checks that turn the concept into a defensible inspection.
- 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.
Explore your inspection requirementsNo limit from motion
How many pixels cover your feature?
Compare feature coverage, camera pixel requirements and exposure using your own planning inputs. These are calculated planning values, not inspection results or an accuracy specification.
Editable planning scenario. Adjust these example inputs for your application; they are separate from the source test and 3D setup. Motion allowance and target coverage are starting points to validate, not acceptance limits. Pixel count starts from the proposed camera's catalog resolution.
Enter finite numbers in every field. Field width, feature width, target coverage, exposure and allowed motion must be greater than zero; horizontal pixel count must be a positive whole number; material speed may be zero. Use values within the supported numeric range if a calculation cannot be represented.
Object sampling mm/px
Pixels across feature px
Horizontal pixels for target px
Motion during exposure px
Exposure ceiling from motion µs
Formulas and assumptions
The field, feature, speed and exposure start with neutral example values. They are not taken from the source test or the 3D illustration. Allowed motion starts at an editable 0.5-pixel example; it is not a recommended acceptance limit. Target coverage starts at an editable 5-pixel example; it is not a recommended detection or measurement threshold. The horizontal pixel count starts from the catalog Resolution row for MV-CI013-GS-NN. Use the effective width after cropping, binning or decimation if those modes are enabled.
- Object sampling (mm/px) = field width (mm) / horizontal pixels.
- Pixels across feature = feature width (mm) / object sampling (mm/px).
- Horizontal pixels for target = field width (mm) × target pixels across feature / feature width (mm), rounded up to a whole pixel.
- Motion (px) = speed (mm/s) × exposure (µs) / 1,000,000 / object sampling (mm/px).
- Exposure for allowed motion (µs) = allowed motion (px) × object sampling (mm/px) / speed (mm/s) × 1,000,000.
The exposure result is the maximum duration from this motion allowance alone. At zero speed, motion sets no exposure limit; the camera, lighting, saturation and other constraints still apply. A shorter exposure does not itself guarantee a reliable inspection.
Field width and feature width refer to the same object plane. The motion calculation assumes uniform linear motion parallel to the field-width direction and a single exposure. It does not model perspective, vibration, rolling-shutter distortion, diffraction, defocus or optical distortion. A strobe may change the effective exposure.
The target result is a horizontal sampling requirement, not a camera recommendation or a change to the selected camera. It uses the effective image width after cropping, binning or decimation and does not determine the vertical resolution or sensor size. Pixel coverage alone does not establish detectability or measurement accuracy. Validate contrast, lens performance, working distance, illumination, calibration, camera exposure limits and the inspection algorithm on representative parts. Changing field width does not change the 3D model or certify that the proposed lens can achieve that field.
The set-up and the parts
| 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 |
LightOur pickLS-4FT100100-NIR
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 usedConfiguration to confirmIn proposed setupCameraOur pickMV-CI013-GS-NN
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 requestIn proposed setupLensOur pickLS-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.
$449.00In proposed setupCamera test stationOur pickLS-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.
$359.00In proposed setupCustom configuration requirements stay attached to this quote. The configurator starts with the standard parts; confirm the custom lights with your quote.
"Tested" identifies the part named in the source. "Our pick" is a proposed alternative or supporting part. The quote includes only cards marked "In proposed setup", with the quantities shown; other test arrangements are separate. Confirm colour, optics, controllers, power supplies, cables and mounting before ordering.
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.
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