Machine Vision Backlights
Use a backlight when the inspection depends on edges, holes, outer contours, or silhouette measurement. A backlight places the object between the light and camera, producing high contrast between the part outline and the background.
Best fit
- Dimensional measurement
- Edge and contour detection
- Hole and gap inspection
- Transparent part outline checks
Likely to fail when
- Surface texture or print must be inspected
- The part cannot be placed between light and camera
- Internal contrast is more important than silhouette
Selection inputs
- Emitting area size
- Uniformity requirement
- Collimated vs diffuse output
- Working distance
- Telecentric lens matching