Plastic-loop rim damage: separate a rough edge from accepted mould texture
The source crop shows a rough, locally damaged outer rim on a pale plastic loop. A white diffuse ring preserves the edge appearance for a trial that distinguishes rejected damage from normal mould seams and texture.
Agree which rim changes are unacceptable before assigning an edge threshold.
Real camera capture
- Light in sourceLS-FRS150 · 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 mould seam, flash or normal edge texture can resemble local damage in a bright plastic part.
A rule needs the actual cosmetic or geometric reject boundary instead of treating every rough pixel as a break.
How it was solved
The source identifies the white diffuse shadowless ring and labels the application plastic-breakage inspection. The retained crop shows local outer-rim roughness, not a documented gap through the whole loop.
Use known accepted and damaged loops to define which edge region matters. The representative part and local rim damage in 3D are illustrative, not measured source geometry.
Why it works
- 1
Diffuse white lighting can provide a usable edge and surface view on a pale shaped part.
- 2
Visible roughness does not establish crack depth, load strength or a numerical breakage limit.
Lighting application-lab catalog capture
Evidence you can inspect
A locally ragged outer edge and the nearby inner loop boundary are visible in the reviewed crop.
The source captions the full image plastic-breakage inspection under the white LS-FRS150.
One cropped appearance example. No through-crack, damage depth, dimensional tolerance, strength test or detection rate is documented.
From image contrast to a production decision
What to validate on your part
- 01
Include accepted mould features
Collect seams, flash and normal texture across mould cavities and batches.
- 02
Label actual rim damage
Use known rejected chips or edge defects close to the acceptance boundary.
- 03
Keep the part plane repeatable
Test normal position and tilt, and verify that the chosen edge signal stays stable.
From the demo to your test bench
Parts in this setup
LightTested
LS-FRS150
142 mm Shadowless light source (LS-FRS150)
White LS-FRS150 identified in the source plastic-breakage example. Printed outer diameter 150 mm, camera opening 80 mm and height 40 mm. The representative 3D loop retains a connected inner path.
$359.00
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-FRS150, white |
|---|---|
| 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 |
| Ring envelope (printed) | 150 mm OD × 80 mm opening × 40 mm high |
| Evidence region | Native outer-rim crop; connected loop is not a documented through-break |
| 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.
Plastics, rubber and ceramics
Related case studies
Plastics, rubber and ceramics
Ceramic glaze appearance under polarized light
Stabilize glare and colour processing before assigning a surface threshold.MethodWhite polarized ring illuminationExplore the study
Plastics, rubber and ceramics
Ceramic-tile pattern visibility
Prove lighting uniformity before classifying a decorative pattern.Proposed light housing (spec)196 × 20.3 × 27 mmExplore the study
Plastics, rubber and ceramics
Comb tooth and gap inspection
Choose sampling for the smallest gap that must remain open.MethodWhite parallel backlightExplore the study
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.