MV-CA060-11GMView part & specifications →Browse camera options →Hem / Case studies / Inspecting oval apertures with telecentric optics
Application study · Precision componentsOval-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.
- Source field51.16 × 38.84 mm
- Source image1628 × 1236 px
- Source report< 0.031 mm
- Lens working distance187 ± 2 mm
Test stationIncluded light holdersKameraObjektivLjusPartSynfält
Drag to rotate · scroll to zoomWalk through this setup 5 guided stops
From component to inspection
Understand each choice.
Choose a stop to frame the part in 3D and see why it belongs in this setup. The component notes and links remain available if 3D cannot load.
Proposed component
MV-CA060-11GM
Current C-mount monochrome camera within the lens sensor-format limit. Recalibrate; source results do not transfer automatically.
Tested component
LS-VCM118-64-AL
The exact imaging lens identified on the application sheet.
Tested component
LS-VCL-64-XW-Y
The source names the green 1 W, 64 mm collimated illuminator. Confirm the corresponding current driver and connector configuration.
Proposed component
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.
Inspect the real capture
Follow the contrast to the part.
Treat the lens, collimated light and fixture as one calibrated measurement system.
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.
From the demo to your test benchKameraMV-CA060-11GMView part & specifications →Browse camera options → Imaging lens
LS-VCM118-64-ALView part & specifications →Browse imaging lens options → Inspection light
LS-VCL-64-XW-YView part & specifications →Browse inspection light options → Test station & mounts
LS-BT-XZ-G-8-6045View part & specifications →Browse test station & mounts options →
Build around the parts you can buy.
Explore each component, check its specifications and compare alternatives. The proposed quote includes the linked test station; its catalog listing includes two lighting holders.
MV-CA060-11GMView part & specifications →Browse camera options →LS-VCM118-64-ALView part & specifications →Browse imaging lens options →LS-VCL-64-XW-YView part & specifications →Browse inspection light options →LS-BT-XZ-G-8-6045View part & specifications →Browse test station & mounts options →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.
Configure the mounting station →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.
Optics application-lab test sheet
Evidence you can inspect
Visible in the images
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.
What the source reports
< 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.
How to use this evidence
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.
What the camera saw
Cropped from the source test sheet; original test annotations are retained. Captures are not generated or enhanced. Drag the comparison slider or use the image buttons.
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-VCM118-64-AL lens and the green 1 W version of the LS-VCL-64 family. 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-VCL-64-XW-Y 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.
From image contrast to a production decision
What to validate on your part
A useful sample image is the starting point. These are the checks that turn the concept into a defensible inspection.
- 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.
Explore your inspection requirementsNo limit from motion
How many pixels cover your feature?
Compare feature coverage, camera pixel requirements and exposure using your own planning inputs. These are calculated planning values, not inspection results or an accuracy specification.
Editable planning scenario. Adjust these example inputs for your application; they are separate from the source test and 3D setup. Motion allowance and target coverage are starting points to validate, not acceptance limits. Pixel count starts from the proposed camera's catalog resolution.
Enter finite numbers in every field. Field width, feature width, target coverage, exposure and allowed motion must be greater than zero; horizontal pixel count must be a positive whole number; material speed may be zero. Use values within the supported numeric range if a calculation cannot be represented.
Object sampling mm/px
Pixels across feature px
Horizontal pixels for target px
Motion during exposure px
Exposure ceiling from motion µs
Formulas and assumptions
The field, feature, speed and exposure start with neutral example values. They are not taken from the source test or the 3D illustration. Allowed motion starts at an editable 0.5-pixel example; it is not a recommended acceptance limit. Target coverage starts at an editable 5-pixel example; it is not a recommended detection or measurement threshold. The horizontal pixel count starts from the catalog Resolution row for MV-CA060-11GM. Use the effective width after cropping, binning or decimation if those modes are enabled.
- Object sampling (mm/px) = field width (mm) / horizontal pixels.
- Pixels across feature = feature width (mm) / object sampling (mm/px).
- Horizontal pixels for target = field width (mm) × target pixels across feature / feature width (mm), rounded up to a whole pixel.
- Motion (px) = speed (mm/s) × exposure (µs) / 1,000,000 / object sampling (mm/px).
- Exposure for allowed motion (µs) = allowed motion (px) × object sampling (mm/px) / speed (mm/s) × 1,000,000.
The exposure result is the maximum duration from this motion allowance alone. At zero speed, motion sets no exposure limit; the camera, lighting, saturation and other constraints still apply. A shorter exposure does not itself guarantee a reliable inspection.
Field width and feature width refer to the same object plane. The motion calculation assumes uniform linear motion parallel to the field-width direction and a single exposure. It does not model perspective, vibration, rolling-shutter distortion, diffraction, defocus or optical distortion. A strobe may change the effective exposure.
The target result is a horizontal sampling requirement, not a camera recommendation or a change to the selected camera. It uses the effective image width after cropping, binning or decimation and does not determine the vertical resolution or sensor size. Pixel coverage alone does not establish detectability or measurement accuracy. Validate contrast, lens performance, working distance, illumination, calibration, camera exposure limits and the inspection algorithm on representative parts. Changing field width does not change the 3D model or certify that the proposed lens can achieve that field.
The set-up and the parts
| Imaging lens | LS-VCM118-64-AL · bi-telecentric · C-mount |
|---|---|
| Belysning | Matched 64 mm collimated backlight |
| Arbetsavstånd | 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-BT-XZ-G-8-6045 · camera test station with glass tray and two lighting holders |
Bi-telecentriskt objektivTestedLS-VCM118-64-AL
The exact imaging lens identified on the application sheet.
$1,639.00In proposed setupCollimated lightTestedLS-VCL-64-XW-Y
The source names the green 1 W, 64 mm collimated illuminator. Confirm the corresponding current driver and connector configuration.
Colour: Green; Power: 1 WConfiguration to confirmIn proposed setupKameraOur pickMV-CA060-11GM
Current C-mount monochrome camera within the lens sensor-format limit. Recalibrate; source results do not transfer automatically.
$759.00In proposed setupCamera test stationOur pickLS-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.
$359.00In proposed setupCustom configuration requirements stay attached to this quote. The configurator starts with the standard parts; confirm the custom lights with your quote.
"Tested" identifies the part named in the source. "Our pick" is a proposed alternative or supporting part. The quote includes only cards marked "In proposed setup", with the quantities shown; other test arrangements are separate. Confirm colour, optics, controllers, power supplies, cables and mounting before ordering.
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.
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