What is a coaxial light source? When is it necessary to use it?

       In the LED light source industry, the light source is diffused through the diffusion plate and hits the transflective beam splitter. The beam splitter reflects the light to the object, and then the object reflects it into the lens. Since the light reflected by the object is on the same axis as the camera, this type of light source is called a coaxial light source.

What are the characteristics of coaxial light sources?

1. Diffusion

2. Uniform

3.Look straight into the camera

When is it necessary to use this light source?

When the surface is flat. According to the characteristics of the coaxial light source, only a flat object surface can better reflect light into the lens. Light from an uneven surface is reflected diagonally to other places, thus appearing dark in the image. therefore. Only those uneven places can be better highlighted.

What should I pay attention to when using this light source?

Coaxial light cannot be too close to the object, otherwise the light surface will not be diffuse and uniform light due to light leakage from its light-emitting surface.

Coaxial light has a piece of translucent and semi-reflective glass in the middle, and when coaxial light is used between the object and the lens, it will affect the accuracy of imaging. This can cause edges to become blurry and not sharp enough.

What are the applications of coaxial light sources?

Coaxial light sources are generally used in reflective plane scratch detection, packaging barcode recognition, porcelain surface detection, plane defect detection, metal plate surface detection, PCB board guidance and positioning, etc.