Recessed-centre inspection: separate a bright local region from groove reflections
The reviewed source crop shows a small bright region in the recessed centre of a dark cross-shaped part. It is an imaging example for a groove-impurity trial, without identifying the material or proving that every bright spot is contamination.
Build the clean-recess reference before assigning bright regions to contamination.
Real camera capture
- Light in sourceLS-DS116 · white
- 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
A recess creates its own shadows and reflections before any debris is present.
The inspection needs known clean parts to distinguish normal central features from unwanted material.
How it was solved
The source identifies a white dome and labels the task groove-impurity inspection. It does not provide a material map or label the cause of the bright region.
Use verified clean and contaminated samples to test the proposed narrower field and diffuse-light arrangement. The source part depth and material are unspecified.
Why it works
- 1
Diffuse illumination can be tried to make recessed surfaces visible from a range of directions.
- 2
Local brightness alone cannot identify a substance or guarantee a clean recess at every depth.
Lighting application-lab catalog capture
Evidence you can inspect
A small bright region is visible in the recessed centre of the dark part.
The source captions groove-impurity inspection with a white LS-DS116.
One cropped appearance example, without contaminant identification, size, recess depth, labelled clean comparison or detection statistics.
From image contrast to a production decision
What to validate on your part
- 01
Establish clean appearance
Include actual groove texture, machining marks and accepted central features.
- 02
Place known material
Test representative debris at the centre, corners and relevant recess depths.
- 03
Set a local decision rule
Validate contrast and false calls under the final focus, part tilt and exposure.
From the demo to your test bench
Parts in this setup
LightTested
LS-DS116
66 mm Dome light source (LS-DS116)
White LS-DS116 explicitly named in the groove-impurity example. Printed 116 mm outside diameter, 25 mm camera opening and 59.4 mm height.
$259.00
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-KF3528M-ML
35mm, F2.8, 1.1", C-mount, Macro lens (59 mm (-0.7X) to 150 mm (-0.25X)) (LS-KF3528M-ML)
Proposed 35 mm C-mount macro lens at its printed 0.25x magnification / 150 mm working-distance pair. The proposed 2448 × 2048 sensor with 3.45 µm pixels gives a derived 33.7824 × 28.2624 mm field; confirm focus, coverage and residual distortion on the real sample.
$339.00
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-DS116, white |
|---|---|
| Source camera / lens | Not specified in the source image caption; proposed parts below |
| Proposed lens point | 0.25x at 150 mm, printed lens pair |
| Derived proposed field | 33.7824 × 28.2624 mm = sensor dimensions / 0.25x; not a source test field |
| Dome envelope (printed) | 116 mm OD × 25 mm camera opening × 59.4 mm high |
| Reviewed source region | Centre of the part; background markings excluded |
| 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.