Keyboard contact mats: reveal repeated contact features under a blue bar
The source blue-bar image shows a matrix of bright contact locations on a dark keyboard-related mat. It supports a trial for repeatable contact-feature appearance without claiming that visible contacts are electrically functional.
Use the visible contact pattern to test orientation; verify switch function independently.
Real camera capture
- Light in sourceLS-2BD23738-RGBW · blue
- EvidenceReal application-lab image
- Imaging kitCamera, lens and fixture proposed
- AcceptanceValidate on representative parts
Lighting application-lab catalog capture
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
Repeated contact features can be confused with glare, holes or nearby traces.
Correct presence and orientation rules depend on the actual mat design and its acceptable variation.
How it was solved
The source describes keyboard-related front/back inspection and identifies the blue diffused bar. Only one capture is supplied for this study; it is not a matched front/back comparison.
Use known mat orientations to test which visible contact features support localization or appearance checks. The proposed camera and fixture are supporting parts, not identified source equipment.
Why it works
- 1
The blue-light example gives strong local contrast at repeated circular features while much of the mat remains darker.
- 2
Visible contact geometry cannot prove contact resistance, key travel or switch actuation.
Lighting application-lab catalog capture
Evidence you can inspect
A grid of bright circular features and surrounding mat detail is visible.
The source labels the example computer-key-mat front/back inspection under a blue diffused bar.
One source capture, without labelled orientation classes, electrical results, detection rates or a stated minimum feature size.
From image contrast to a production decision
What to validate on your part
- 01
Label the actual orientations
Capture verified front and back states for each mat design.
- 02
Include acceptable mat variation
Test mould texture, contact finish, handling marks and normal positional variation.
- 03
Keep electrical testing separate
Validate any appearance decision independently of switch function or contact-resistance requirements.
From the demo to your test bench
Parts in this setup
LightTested
LS-2BD23738-RGBW
237 x 32 mm Diffused bar light (LS-2BD23738-RGBW)
Blue 237 × 38 × 27 mm diffused bar identified in the source keyboard-mat front/back inspection caption. One light is proposed; the exact source direction is not supplied.
$159.00
In proposed setup
CameraOur pick
MV-CS050-10GM(NPOE)
Hikrobot MV-CS050-10GM(NPOE) 5 MP GigE area scan camera, IMX264, Gen 2 basic version, Mono, Without PoE
5 MP monochrome global-shutter camera proposed for a contrast trial. Confirm field, sampling, exposure and algorithm on the actual application.
$819.00
In proposed setup
LensOur pick
LS-KF1628M-ML
16mm, F2.8, 1.1", C-mount, Macro lens (52 mm (-0.25X) to 546 mm (-0.03X)) (LS-KF1628M-ML)
Proposed 16 mm C-mount macro lens at its printed 0.1x magnification / 152 mm working-distance pair. The proposed 2448 × 2048 sensor with 3.45 µm pixels gives a derived 84.456 × 70.656 mm field; confirm focus, coverage and residual distortion on the real sample.
$319.00
In proposed setup
Camera test stationOur pick
LS-BT-XZ-G-6-6045
Camera stand with XZ adjustment and glass tray, height 600 mm (LS-BT-XZ-G-6-6045)
600 mm column, 600 × 450 mm breadboard, XZ adjustment, glass tray and two lighting holders as listed. Proposed bench fixture; confirm loads, travel and camera/lens clamps.
$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
| Tested light | LS-2BD23738-RGBW, blue |
|---|---|
| Source camera / lens | Not specified in the source image caption; proposed parts below |
| Proposed lens point | 0.1x at 152 mm, printed lens pair |
| Derived proposed field | 84.456 × 70.656 mm = sensor dimensions / 0.1x; not a source test field |
| Bar housing (printed) | 237 × 38 × 27 mm |
| Mounting (proposed) | LS-BT-XZ-G-6-6045; 600 mm column, 600 × 450 mm base, glass tray and two included 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. Lens and light envelopes use printed dimensions. The linked station uses its published base size and column height; carriage, brackets, fittings, parts and spacing are illustrative. Confirm load, travel, fasteners and clearances before ordering. Light paths explain the arrangement and do not simulate optical performance. Representative part geometry is illustrative, not reconstructed inspection evidence. The specimen and lighting angle are representative, not dimensions or settings recovered from the source capture.
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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.