Patent ID: 6470150
Filing Date: 2002-10-22
Classification: G02B,G03B

Abstract:
A distance measuring apparatus for a camera having a photometering device with a plurality of photometering zones that measure a brightness of an object, comprising:a light receiving device provided with a plurality of distance measuring zones, each photometering zone being arranged to conduct a photometering operation for each distance measuring zone, said light receiving device including an array of photoelectric conversion elements that convert light received thereon into an electric charge that is accumulated, the accumulated electric charges being output in order from each photoelectric conversion element as an analog picture signal of the light receiving device; an A/D converter that converts the analog picture signal into digital image data; a transformation range setting device that sets a transformation range corresponding to photometering data of the photometering zones that overlap the distance measuring zones; and a logarithmic transformation device that performs a logarithmic transformation on the digital image data at said set transformation range to obtain sensor data.