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Automatic Focus Checking for Optical Inspection System Disclosure Number: IPCOM000035919D
Original Publication Date: 1989-Aug-01
Included in the Prior Art Database: 2005-Jan-28

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Parker, DT Seigart, W Skinner, M [+details]


The mechanical focus position of video cameras in automated optical inspection systems must be maintained to ensure proper defect detection. Optimum focus is the mechanical camera position providing the steepest video rise time.