Bottle-bottom contamination: make an obstruction interrupt transmitted light
The supplied capture shows dark material inside the bright circular base of a bottle. A backlight makes transmitted-light contrast the starting point for a trial, while the bottle moulding remains part of the inspection problem.
Build the clean-bottle variation into the test before setting a dark-spot threshold.
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
A transparent container is not an empty optical path: thick base moulding and curved walls create their own dark arcs.
The trial must distinguish retained material from normal bottle geometry, scuffs and reflections.
How it was solved
The catalog pairs the bottle-bottom foreign-matter example with the white LS-BKL-1300 backlight. The camera looks toward the illuminated panel through the bottle base.
A proposed bench fixture holds the base repeatably above the light. Camera, lens, distance and exposure below are starting choices, not the source imaging recipe.
Why it works
- 1
An object that blocks or scatters transmitted light can appear darker than the surrounding bottle base.
- 2
The dark regions are visible evidence of contrast; they are not a measured contaminant size or a demonstrated acceptance threshold.
Lighting application-lab catalog capture
Evidence you can inspect
Dark irregular material is visible inside the circular bottle base.
The source identifies foreign-matter inspection and a white LS-BKL-1300; it supplies no defect-size, recall or throughput result.
One application-lab capture. It does not establish detection through every bottle colour, base thickness or contaminant type.
From image contrast to a production decision
What to validate on your part
- 01
Test clean containers
Include mould seams, base embossing and normal scuffs from every container variant.
- 02
Challenge the contaminant
Use representative materials, sizes and positions, including material at the base edge.
- 03
Fix the inspection geometry
Lock bottle position and exposure, then measure missed defects and false calls on an independent set.
From the demo to your test bench
Parts in this setup
LightTested
LS-BKL-1300
100 x 100 mm Back light source (LS-BKL-1300)
White 100 × 100 mm backlight explicitly identified in the source caption; 135 × 115 × 19 mm printed housing.
$279.00
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-FFL-1454
16mm, F2.8, 1.1", C-mount, Macro lens (52 mm (-0.25X) to 546 mm (-0.03X)) (LS-FFL-1454)
Proposed 16 mm C-mount macro lens. The illustration uses its printed 0.1x magnification at 152 mm working distance. The proposed camera sensor gives a derived 84.456 × 70.656 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-MNT-0097
Camera stand with XZ adjustment and glass tray, height 600 mm (LS-MNT-0097)
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.
$629.00
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-BKL-1300, white |
| Emitting area (printed) | 100 × 100 mm |
| Camera and lens | Source versions not identified; current proposed parts below |
| 3D spacing | Illustrative, to be confirmed on the sample |
| Derived proposed field | 84.456 × 70.656 mm = sensor dimensions / 0.1x; source field not supplied |
| Mounting (proposed) | LS-MNT-0097; 600 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.