Method and apparatus for illuminating translucent and semi-trans

Details Method and apparatus for illuminating translucent and semi-trans Method and apparatus for illuminating translucent and semi-trans

1997-01-29

1998-07-14

Chin, Tommy P.

Television

Special applications

Flaw detector

348127, 348129, 348 88, 348 89, H04N 718

Patent

active

057812306

ABSTRACT:
A machine vision system and method of enhancing the imaging of an article which is comprised of optically translucent or semi-transparent material. Generally, the system includes a vision processor, a video camera, a computer, and an illuminator. The illuminator directs light, in a three dimensional space, at a surface of the material other than a surface to be imaged. The light which enters the translucent material is scattered isotropically within the material and emerges from the surface to be imaged, in effect illuminating the material. The illumination enhances contrast, that can be typically achieved with conventional lighting, between the material and its background or adjoining components permitting the machine vision system to clearly image and detect features of the article.

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