Optics & lighting
Validate aperture and depth of field with a test matrix
A sharp center image does not establish usable depth of field. Test the smallest relevant feature at every required height and field position.
Machine vision troubleshooting
Optics & lighting
Build repeatable contrast with the right illumination, lens and working distance.
Optics & lighting
17 tutorials
Optics & lighting
Choose lighting and ROI for visible assembly checks
Separate required parts from clamps and reflections with paired lighting tests, nonoverlapping zones and explicit visibility limits.
Optics & lighting
EAN-13 traceability: lighting and quiet zones
Keep the printed symbol, its quiet zones and source coordinate mapping intact when comparing illumination or tightening a reader ROI.
Optics & lighting
Component counting: lighting and ROI boundaries
Choose contrast that preserves separation, exclude tray features and define how border-touching components are handled in the count.
Optics & lighting
Dimensional inspection: lighting and edge ROI
Choose a repeatable edge definition with controlled lighting and ROI geometry; retain raw images when threshold changes shift a measured edge.
Optics & lighting
Lighting and ROI for a visible liquid boundary
Separate a real liquid boundary from wall reflections, seams and foam before using a fixed ROI to calculate a visible level proxy.
Optics & lighting
Calibrate flat-field shading without hiding bad data
Remove stable shading only after fixing illumination and optics. A correction map cannot restore saturated pixels or changing shadows.
Optics & lighting
Compare red, blue and white illumination by defect contrast
Choose light color from measurable defect/background separation, not the brightest image. Color changes can invert contrast and move best focus.
Optics & lighting
OCR labels: light and field geometry
Preserve the whole text field through lighting comparison and ROI mapping so that a cropped or reflected character cannot silently disappear from verification.
Optics & lighting
Choose lighting and ROI for open-package contents
Use matched present, absent and covered-item controls to separate actual visible contents from tray edges, reflections and wrapping.
Optics & lighting
Part positioning: lighting and ROI stability
Stabilize the visible target center with controlled lighting and explicit ROI coordinates; test centroid bias from glare, shadows and clipping.
Optics & lighting
Run a polarization A/B test for glare
Suppressing a bright reflection is useful only if the defect remains visible. Compare unpolarized and cross-polarized images on the same scratched and good surfaces.
Optics & lighting
Presence inspection: lighting and ROI control
Compare illumination and inspection regions for a missing-feature check; preserve absent and obscured controls when choosing contrast.
Optics & lighting
Seal and bead appearance: lighting and ROI
Compare light and source-linked path regions without letting reflections or an ROI crop erase a real visible gap in the seal or adhesive bead.
Optics & lighting
SKU color sorting: light and object mask
Compare product color on a stable object region while keeping shadows, specular highlights and colored background from silently redefining the sample.
Optics & lighting
Verify the optical strobe inside the exposure window
Electrical lamp trigger timing does not prove when light reaches the part. Measure the optical pulse and the supported camera exposure/flash window together.
Optics & lighting
Surface defects: light and ROI validation
Compare lighting directions on the same scratch and preserve the datum-to-surface region instead of hiding troublesome reflections with an arbitrary crop.
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Engineering review
Bring the inspection problem and the evidence.
Send sample images, your current setup and the check that failed. Include field of view, working distance, line speed and acceptance criteria for a practical review.
Send samples for engineering review