Printed resistor patterns: reveal the track as a repeated silhouette
The application image shows repeated serpentine resistor tracks against a bright background. Transmitted-light contrast can support a trial for visible pattern interruptions or unwanted bridges, while electrical performance requires a separate test.
A visual pattern inspection complements an electrical test; it does not replace it.
Real camera capture
- MethodTransmitted white backlight
- EvidenceReal application-lab capture
- SetupSource light identified; imaging kit proposed
- AcceptanceValidate on your own parts
Explore it in 3D
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.
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
Long repeated tracks contain many bends and narrow spaces. Normal edge texture must not be mistaken for a break or bridge.
A full-sheet field and the smallest rejectable feature impose different resolution requirements.
How it was solved
The catalog pairs the resistor-defect example with a white LS-HFS400300 backlight. Inspect the dark printed paths against the bright transmitted field.
First define the smallest visible break or bridge and choose a field and sampling that resolve it; the large light area does not force a single camera view of the whole sheet.
Why it works
- 1
Opaque tracks interrupt the transmitted background, making their topology visible without relying on front-surface reflections.
- 2
A visual track match can detect appearance differences, but it does not measure resistance, continuity under load or contact quality.
Lighting application-lab catalog capture
Evidence you can inspect
Repeated dark serpentine tracks are clearly separated by bright channels.
The source labels the example resistance defect inspection with a white LS-HFS400300; no electrical measurement is supplied.
The capture does not label a specific failed track or establish sensitivity to a particular break width.
From image contrast to a production decision
What to validate on your part
- 01
Use labelled pattern samples
Include known breaks, bridges, pinholes and acceptable printing texture.
- 02
Set the field from the defect
Calculate pixels across the smallest required visual feature and test the sheet edges.
- 03
Correlate with electrical checks
Keep appearance inspection separate from resistance and continuity acceptance.
From the demo to your test bench
Parts in this setup
LightTested
LS-HFS400300
400 x 300 mm Back light source (LS-HFS400300)
White LS-HFS400300 backlight identified in the source meander-pattern example; 400 × 300 mm luminous area and 434 × 314 × 24 mm printed housing.
$509.00
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 for a bench contrast trial; confirm sampling, sensitivity and exposure on the actual part.Not available in the United States. Available for delivery to other countries.
$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. The illustration uses its printed 0.03x magnification at 546 mm working distance. The proposed camera sensor gives a derived 281.52 × 235.52 mm field. Confirm field, focus and residual distortion on the actual sample; this is not calibrated measurement accuracy.
$319.00
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, 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
| Lighting | Transmitted white backlight |
|---|---|
| Test light | LS-HFS400300, white |
| Luminous area (printed) | 400 × 300 mm |
| Camera and lens | Source versions not identified; current proposed parts below |
| 3D spacing | Illustrative, to be confirmed on the sample |
| Derived proposed field | 281.52 × 235.52 mm = sensor dimensions / 0.03x; source field not supplied |
| Mounting (proposed) | LS-BT-XZ-G-8-6045; 800 mm column, 600 × 450 mm base, glass tray and two light 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.
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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.