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Olympus Corp
Original Assignee
Olympus Optical Co Ltd
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Filing date
Publication date
Application filed by Olympus Optical Co LtdfiledCriticalOlympus Optical Co Ltd
Priority to JP10628377ApriorityCriticalpatent/JPS5440633A/en
Publication of JPS5440633ApublicationCriticalpatent/JPS5440633A/en
PURPOSE: To make narrow the dynamic range of a signal processing circuit by regulating the brightness signal level of a group of light receiving elements for producing image contrast information for focal adjustment.