Preparing the published article.
Vision Lighting Design Basics
Most vision failures are lighting failures.
Lighting choices
| Technique | Fits when |
|---|---|
| Backlight | Silhouette measurement of opaque parts |
| Bar or area light | General surface inspection |
| Ring light | Small parts and holes at close range |
| Coaxial | Shiny, flat surfaces |
| Dome | Reflective or curved surfaces |
| Structured light | 3D shape and volume |
Practical advice
- Fix the lighting before tuning the algorithm.
- Plan for lamp ageing and drift over time.
- Control ambient light; sunlight through a window breaks repeatability.
Lighting design is application-specific. Test with production parts and the actual enclosure.