Auxiliary blanking and auxiliary simulated video line generator unit for a video inspection system

摘要

An auxiliary blanking and simulator method and apparatus for providing a blanking window and simulated video pulses for a bright field analyzer video inspection system. Monostables triggered by the horizontal and vertical synchronization pulses of the video inspection system define the horizontal and vertical leading and trailing edges of a blanking window signal. The blanking window signal defines a blanking window within which inspection is inhibited. The blanking window signal is coupled to a reject gate of the video inspection system and to a video monitor for displaying the blanking window. A second group of monostables generates a simulated video signal for enhancing the shoulder blanking capability of the video inspection system. This simulated signal is combined with the video information signal from a video camera before the video signal is electronically processed for defect determination.