Patent ID: 6112030
Filing Date: 2000-08-29
Classification: G02B

Abstract:
A distance measuring apparatus of a camera, comprising:a pair of image forming lenses, each of said image forming lenses forming a subject image;a pair of line sensors on which said subject images are respectively formed through said pair of image forming lenses, wherein each line sensor has a plurality of light receiving elements, each light receiving element converting received light into an electrical signal representing a brightness value, so that subject distances of different areas of a common subject image can be measured in accordance with said converted electrical signals;a photometering circuit that detects an average brightness value of said common subject image; anda judging system that evaluates whether a backlit-state exists bv detecting a maximum brightness value from all said brightness values, calculating an average brightness value from said brightness values for one of said pair of line sensors, calculating a first difference between said maximum brightness value and said average brightness value, comparing said first difference with a first predetermined reference value and determining that said backlit-state exists when said first difference is greater than said first predetermined reference value.