Why Use Machine Vision Lighting?

Posted by OMRON on 30-Jan-2019 11:41:29 AM

In OMRON, Machine Vision

 

Understanding Lighting Concepts

 

  • A well planned machine vision lighting application is designed to maximize feature contrast, while minimizing contrast of the rest.
  • Images with poor contrast and uneven illumination require more effort from the imager, increasing process time.
  • High contrast features simplify integration and improve reliability.
  • Variation of the part and environment should not affect the results.
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Effective Lighting Maximizes Feature Contrast


In each example, the same part, camera and lens are used. Different light makes the vision processing harder or easier.

 

UnderstandingLight_Contrast

 

Three Elements Are Needed To Make an Image

  1. Camera: It looks at the reflected light, not at the part
  2. Part: It can reflect light in many ways, so look at the part features
  3. Illumination: Broad-band, monochromatic light source (i.e. NERLITE products)
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Written by OMRON