Television – Special applications – Flaw detector
Patent
1993-10-05
1995-10-24
Chin, Tommy P.
Television
Special applications
Flaw detector
348125, 348126, 348 87, 348 92, 382141, H04N 718
Patent
active
054614171
ABSTRACT:
The invention pertains to a method and apparatus for providing a continuous, uniform, diffuse lighting environment for use in conjunction with electronic machine vision, or manual microscope inspection systems to inspect specular surfaces such as soldered circuits, ball bearings, reflective packaging, relective packaging, etc. The disclosed invention effectively eliminates apparent variations in surface brightness caused by the reflection of discontinuities in traditional machine vision lighting systems that typically require windows or viewing openings or orifices to allow visual access to the object being observed, thus allowing for a true observation signal from which the effect of surface geometry has been substantially removed. The object being observed is illuminated using a diffuse lighting system that comprises, in combination, an on-observation axis diffuse light source and an off-observation axis light source each controlled under separate brightness control such that a substantially uniform diffuse lighting environment is created over the entire object.
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LeBlanc Steven M.
Messina Michael C.
White Timothy P.
Chin Tommy P.
Le Vu
Northeast Robotics, Inc.
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