Oval-aperture inspection with a bi-telecentric lens and collimated light
A bi-telecentric imaging lens and matched collimated light create strong contrast around repeated oval apertures. Inspect the source capture, then explore a proposed camera, optics and mounting arrangement.
Treat the lens, collimated light and fixture as one calibrated measurement system.
Real camera capture
- Source field51.16 × 38.84 mm
- Source image1628 × 1236 px
- Source report< 0.031 mm
- Lens working distance187 ± 2 mm
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.
Optics application-lab test sheet
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
Small changes in part height and reflections at an edge can move a conventional image boundary. Gauging needs a repeatable silhouette before it needs a measurement algorithm.
The fixture must hold the part in the lens working range and keep the illumination and imaging axes aligned.
How it was solved
The source identifies the LS-TCL-2507 lens and the green 1 W version of the 64 mm-beam light in the LS-CLM-S08 series. Its original camera was 2 MP, 1/1.8-inch with 4.4 µm pixels; the proposed Hikrobot camera is a different 6 MP, 1/1.8-inch model.
The proposed LS-CLM-0072 provides the matching 64 mm collimated beam. The station supports a camera/lens above a glass tray with the illuminator below it; clamp interfaces and load capacity need confirmation.
Why it works
- 1
Bi-telecentric means telecentric on both the object and image sides of one lens. It reduces perspective and magnification variation within the specified operating range; it does not mean two cameras.
- 2
A telecentric illuminator is a separate component. Its collimated light helps limit edge wraparound and produces the bright background behind the silhouette.
- 3
Dual-telecentric is also used for a bi-telecentric imaging lens. This setup pairs that lens with a separate collimated illuminator. Calibrate the complete camera, lens, light and fixture assembly at its actual aperture and part plane.
Optics application-lab test sheet
Evidence you can inspect
The source capture shows repeated oval boundaries with bright rims and dark centres. Several positions have visibly different boundary contrast; the sheet does not define a pass/fail threshold.
< 0.031 mm over 51.16 × 38.84 mm with 1628 × 1236 px, as reported by the source. The sheet provides no uncertainty budget or repeatability study.
The capture demonstrates edge contrast. The source camera differs from our proposal; neither the reported accuracy nor the source field is guaranteed for the proposed camera.
From image contrast to a production decision
What to validate on your part
- 01
Calibrate the actual assembly
Use a traceable artefact at the part plane. Record pixel scale, edge settings, aperture and illumination current.
- 02
Test loading and alignment
Reload and rotate multiple parts. Vary the height and axis alignment across the required fixture tolerances.
- 03
Build a measurement study
Compare against independent metrology and assess bias, repeatability and the decision margin at the drawing limits.
From the demo to your test bench
Parts in this setup
Bi-telecentric lensTested
LS-TCL-2507
Bi-telecentric lens for 1/1.8" cameras, 0.142x, WD 187 mm, C-Mount (LS-TCL-2507)
The exact imaging lens identified on the application sheet.
$2,509.00
In proposed setup
Collimated lightTested
LS-CLM-0072
Collimated (telecentric) illumination, beam dia. 64 mm, length 136 mm (LS-CLM-0072)
The source names the green 1 W, 64 mm collimated illuminator. Confirm the corresponding current driver and connector configuration.Colour: Green; Power: 1 W
Configuration to confirm
In proposed setup
CameraOur pick
MV-CA060-11GM
Hikrobot MV-CA060-11GM 6MP Area Scan Camera, GigE, IMX178, Mono
Current C-mount monochrome camera within the lens sensor-format limit. Recalibrate; source results do not transfer automatically.Not available in the United States. Available for delivery to other countries.
$759.00 · quote
In proposed setup
Camera test stationOur pick
LS-MNT-0101
Camera stand with XZ adjustment and glass tray, height 800 mm (LS-MNT-0101)
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.
$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
| Imaging lens | LS-TCL-2507 · bi-telecentric · C-mount |
|---|---|
| Illumination | Matched 64 mm collimated backlight |
| Working distance | 187 ± 2 mm, from lens specification |
| Source image | 1628 × 1236 px |
| Proposed camera | MV-CA060-11GM · requires a fresh trial |
| Proposed field (derived) | About 51.9 × 34.6 mm: 3072 × 2048 pixels × 2.4 µm / 0.142x |
| Mounting (proposed) | LS-MNT-0101 · camera test station with glass tray and two 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
This collimated light requires the specified constant-current driver configuration. Confirm current, colour, connector and power before selecting a controller; a general 24 V voltage controller is not a substitute. Camera cables and PC are separate selections.
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.
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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.