What Are the Characteristics of Coaxial, Dome, and AOI Light Sources?

What Are the Characteristics of Coaxial, Dome, and AOI Light Sources?

When undertaking machine vision inspections, choosing the right light source can be a challenging task. Selecting the appropriate model, color, and illumination angle requires understanding the characteristics of various machine vision light sources. To assist in this process, let's explore the characteristics and typical applications of coaxial, dome, and AOI light sources with falenses technology.

1. Characteristics of Coaxial Light Sources

A coaxial light source is made up of a high-density array of LEDs that emits high-intensity, uniform light. The light is reflected through a semi-transparent mirror with a special coating, ensuring the light and camera share the same optical axis. This design helps eliminate ghosting and reflections in the captured image, making it suitable for detecting scratches on mirror-finished workpiece surfaces.

Coaxial Light Source Applications:

• Laser marking detection on chips
• Scratch detection on high-reflective surfaces
• QR code detection on metal and glass

2. Characteristics of Dome Light Sources

A dome light source is a shadowless diffuse light source. Its structure contains a semi-spherical reflective membrane with integrative properties, which ensures light is evenly reflected onto the object from all directions. This creates uniform illumination without shadows.

Dome Light Source Applications:

• Inspection of reflective and uneven surfaces
• Curved and concave-convex surface inspections
• Capacitor surface damage detection
• Inspection of curved and textured surfaces

3. Characteristics of AOI Light Sources

AOI (Automated Optical Inspection) light sources use multi-angle and multi-color lighting to accurately capture 3D surface information from the object being inspected. This design allows for precise detection and analysis of complex and layered surfaces.

AOI Light Source Applications:

• Soldering inspection on circuit boards
• Multi-layered object inspection
• Multi-color character inspection

Conclusion

These are the characteristics and application scopes of coaxial, dome, and AOI light sources. If you're still unsure about which light source to choose, falenses technology's laboratory provides free lighting test services, allowing you to send samples for testing. This service can help you determine the best light source for your specific application.