Backlights for Edges and Holes
Use a backlight when the inspection measures an edge, a hole, or an outer contour. The part sits between the light and the camera, and the outline becomes a silhouette. Read the emitting area on the backlight model row.
What applications are backlights for edges and holes best suited for?
Open the series, then send the part.
- Dimensional measurement
- Edge and contour detection
- Hole and gap inspection
- Transparent part outline checks
When should you avoid using backlights for edges and holes?
Use another geometry when the surface does this.
- Surface texture or print is the inspection target
- The part cannot be placed between light and camera
- Internal contrast is more important than silhouette
What are the primary selection inputs for backlights for edges and holes?
Send these with the part.
- Emitting area size
- Uniformity requirement
- Collimated vs diffuse output
- Working distance
- Telecentric lens matching
What are the key engineering specifications for backlights for edges and holes?
Wavelength, working distance, voltage, cooling, and strobe sit on the model row.
| Design Parameter | Standard Engineering Benchmark |
|---|---|
| Optical Geometry | Planar diffuse or collimated transmission silhouette illumination |
| Available Wavelengths | White, Red (625nm high penetrability), Blue (470nm high diffraction edge) |
| Typical Working Distance | Part between the backlight and the lens; distance on the model row |
| Operating Voltage | 24V DC standard |
| Cooling Method | High-density aluminum plate passive heat dissipation |
| Strobe Overdrive Capability | High-speed pulsed strobe compatible for edge and dimensional measurement |
What are the most frequently asked questions about backlights for edges and holes?
When is Backlights for Edges and Holes useful?
Use a backlight when the inspection measures an edge, a hole, or an outer contour. The part sits between the light and the camera, and the outline becomes a silhouette. Read the emitting area on the backlight model row.
What information is needed to select a light?
Start with Emitting area size, Uniformity requirement, Collimated vs diffuse output. Share target images and the inspection requirement so the arrangement can be checked on the actual application.