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Detailed explanation of 6 light source colors commonly used in industrial machine vision

2021-09-15

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1. White light source (W)

White light sources are usually defined by color temperature: the color with high color temperature is bluish (cool color, color temperature greater than 5000K); the color with low color temperature is reddish (warm color, color temperature less than 3300K); the color temperature between 3300~5000K is called intermediate color . White light sources have wide applicability and high brightness, and are often used when shooting color images.

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2. Blue light source (B)

The wavelength of the blue light source is 430~480nm, which is suitable for products with a silver background (such as sheet metal, automotive processing parts, etc.), and metal printing on films.

3. Red light source (R)

The wavelength of the red light source is 600~720nm. It has a longer wavelength and can penetrate some darker objects. For example, black transparent flexible board holes, green circuit boards, etc. When illuminated with a red light source, the contrast can be improved.

4. Green light source (G)

The wavelength of the green light source is 510~530nm. Its wavelength is between red and blue, suitable for products with red background and silver background (such as sheet metal, automotive processing parts, etc.).

5. Infrared light source (IR)

The wavelength of the infrared light source is 780~1400nm. Infrared light is invisible light with strong transmission power, and is generally used in LCD screen detection, video surveillance, etc.

6. Ultraviolet light source (UV)

The wavelength of the ultraviolet light source is generally 190~400nm. Its short wavelength and strong penetrating power are mainly used in document detection, glue overflow detection, and metal surface scratch detection.