In-Sight 7000 Series Smart Camera Color Illumination Selection Guide

Choosing the right color (wavelength) of light is one factor. For a specific application, it is also important to consider auxiliary factors such as lighting geometry, pattern, structure and other factors that may affect the effect of colored lighting. 

Overview of color lighting options for In-Sight 7000 Series smart cameras:

1) White wavelength: WHI  

Advantages: Includes all wavelengths of the spectrum  

Disadvantages: Difficulty using bandpass filters to avoid interference from ambient light 

Typical application: color camera application 

2) Infrared (IR) wavelength: 850nm-1050nm  

Advantages: Infrared light cannot be seen, so it is suitable for use in situations where visible wavelengths would hinder workers  

Disadvantages: Check the sensitivity of the camera carefully. A CCD is not sensitive to infrared light. Infrared light requires a special polarizing filter. Be sure to use an infrared lens.

Typical applications: Used in applications that require light to pass through materials such as plastics and require the ability to see objects through the material  

3) Red wavelength: 625nm-660nm  

Advantages: Generally cheap; CCD sensitivity is usually very high  

Typical applications: any

4) Green wavelength: 530nm 

Typical application: For inspecting green objects such as PCBs or wafers  

5) Blue wavelength: 470nm 

Advantages: high scattering rate 

Disadvantages: High scattering rates may create noise on objects with multiple defects  

Typical applications: For applications requiring detection of tiny defects at high resolution 

6) Ultraviolet (UV) wavelength: 365nm-395nm 

Advantages: 365nm light can cause materials to fluoresce  

Cons: Knows safety precautions in environments where people are present 

Typical applications: used to detect glue, viscose, pigments, and UV inks  

How to use color reflection/absorption to get contrast? Does the artifact have color?

If the wavelength used is the same as the color of the object, the light will be reflected brightly in the binary image.

If the wavelength used is opposite to the color of the object, the light will be absorbed and appear black in the binary image.