MV-CS050-10GM(NPOE)View part & specifications →Browse camera options →홈 / Case studies / Bright PCB fiducial on a textured background
Application study · Electronics manufacturingPCB fiducials: separate the reference mark from a reflective background
A compact ring light makes the board reference cross stand out in this real source capture. The purpose is stable localization of a known mark before the next positioning or inspection step.
A visible fiducial becomes a positioning tool only after calibration and repeatability checks.
- Proposed light housing (spec)Ø50 × 17.5 mm
- EvidenceReal lighting-lab captures
- Camera (proposed)2448 × 2048 monochrome
- Field (derived proposal)33.78 × 28.26 mm
Test stationIncluded light holders카메라렌즈조명Part시야
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-CS050-10GM(NPOE)
5 MP monochrome global-shutter camera, 2448 × 2048 pixels, 3.45 µm pixels and C-mount. Proposed for a bench contrast trial; the source does not identify its camera. Requires separate camera power; this NPOE model does not support PoE.
Proposed component
LS-KF3528M-ML
35 mm C-mount macro lens; its printed 0.25x at 150 mm working distance gives a derived 33.78 × 28.26 mm field on the proposed camera. Confirm light coverage and focus on the actual part.
Tested component
LS-2HPR50
Source white ring light; 50 mm outer diameter, 18 mm opening and 17.5 mm height.
Proposed component
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.
Inspect the real capture
Follow the contrast to the part.
A visible fiducial becomes a positioning tool only after calibration and repeatability checks.
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. The part geometry is illustrative and is not reconstructed from the camera image. The proposed field is derived from the printed lens magnification and camera pixel dimensions; actual coverage and focus need a bench check. The illustrated ring position keeps the drawn viewing envelope inside its central aperture; verify vignetting and illumination on the actual sample. Representative part geometry is illustrative, not reconstructed inspection evidence.
From the demo to your test bench카메라MV-CS050-10GM(NPOE)View part & specifications →Browse camera options → Imaging lens
LS-KF3528M-MLView part & specifications →Browse imaging lens options → Inspection light
LS-2HPR50View part & specifications →Browse inspection light options → Test station & mounts
LS-BT-XZ-G-6-6045View 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-CS050-10GM(NPOE)View part & specifications →Browse camera options →LS-KF3528M-MLView part & specifications →Browse imaging lens options →LS-2HPR50View part & specifications →Browse inspection light options →LS-BT-XZ-G-6-6045View 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
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.
Lighting application-lab image sheet
Evidence you can inspect
Visible in the images
A bright cross-shaped fiducial is distinguishable from its surrounding texture.
What the source reports
The sheet reports clear mark visibility and reduced background reflection; it gives no location error or repeated-trial result.
How to use this evidence
A lighting application-lab demonstration. The source supplies no customer deployment, defect-size limit, repeatability study or production false-call data. Proposed camera, lens, field, mounting and spacing are not the original tested system.
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
A fiducial can sit beside reflective pads and textured laminate. The brightest object is not always the reference mark, so stable contrast is essential.
How it was solved
The source uses white LS-2HPR50. The proposed camera and macro lens provide a separate bench starting point; they are not identified in the original trial.
Why it works
- 1
A compact diffuse ring can illuminate the reference area with less directional shadow.
- 2
Finding a clear cross in one image does not establish location repeatability. Calibrate and measure repeated placements before assigning a positioning tolerance.
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 coordinate system
Use a known reference at the actual board plane and account for lens distortion.
- 02
Repeat loading
Measure detected centre position across board translations, rotations and fixture reloads.
- 03
Include distractors
Test nearby pads, scratches, solder-mask changes and partial occlusion before trusting a location score.
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-CS050-10GM(NPOE). 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
| Lighting evidence | Application-lab source captures |
|---|---|
| Camera and lens | Proposed catalog components; source camera unspecified |
| Proposed field (derived) | 33.78 × 28.26 mm at 0.25x |
| Lens working distance (spec) | 150 mm at the listed magnification |
| Mounting (proposed) | LS-BT-XZ-G-6-6045 · 600 mm station, glass tray and two lighting holders |
조명TestedLS-2HPR50
Source white ring light; 50 mm outer diameter, 18 mm opening and 17.5 mm height.
$89.00In proposed setup카메라Our pickMV-CS050-10GM(NPOE)
5 MP monochrome global-shutter camera, 2448 × 2048 pixels, 3.45 µm pixels and C-mount. Proposed for a bench contrast trial; the source does not identify its camera. Requires separate camera power; this NPOE model does not support PoE.
$819.00In proposed setup렌즈Our pickLS-KF3528M-ML
35 mm C-mount macro lens; its printed 0.25x at 150 mm working distance gives a derived 33.78 × 28.26 mm field on the proposed camera. Confirm light coverage and focus on the actual part.
$339.00In proposed setupCamera test stationOur pickLS-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.
$359.00In proposed setup"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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Start with your inspection requirement
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.
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