초록 ▼

A distance measuring apparatus in a lens-shutter type camera is provided with a photographic lens having variable focal length. The device includes a pair of image forming lenses each forming a subject image, a pair of line sensors on which the subject images are respectively formed through the pair

A distance measuring apparatus in a lens-shutter type camera is provided with a photographic lens having variable focal length. The device includes a pair of image forming lenses each forming a subject image, a pair of line sensors on which the subject images are respectively formed through the pair of image forming lenses, the pair of line sensors each having a plurality of light receiving elements. The unit also includes a plurality of light receiving areas formed correspondingly on each of the pair of line sensors, the plurality of light receiving areas each including a predetermined number of the plurality of light receiving elements. The plurality of light receiving areas respectively receive different areas of a corresponding one of the subject images formed by the pair of image forming lenses, and each adjacent pair of light receiving areas of the plurality of light receiving areas overlap each other. A device for detecting a current focal length of the photographic lens, and a device for shifting at least one of the plurality of light receiving areas on each of the pair of line sensors in accordance with the current focal length detected by the detecting device areas provided. Each light receiving element converts received light into an electrical signal which is integrated to output image data.

대표청구항 ▼

[ We claim:] [1.] A distance measuring apparatus in a lens-shutter type camera provided with a photographic lens, a focal length of said photographic lens being variable, said distance measuring device comprising:a pair of image forming lenses, each lens of said pair of image forming lenses forming

[ We claim:] [1.] A distance measuring apparatus in a lens-shutter type camera provided with a photographic lens, a focal length of said photographic lens being variable, said distance measuring device comprising:a pair of image forming lenses, each lens of said pair of 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, said pair of line sensors each having a plurality of light receiving elements;a plurality of corresponding light receiving areas formed on each of said pair of line sensors, said plurality of light receiving areas each including a predetermined number of said plurality of light receiving elements, wherein said plurality of light receiving areas respectively receive different areas of a corresponding one of said subject images formed through said pair of image forming lenses, and wherein each adjacent pair of light receiving areas of said plurality of light receiving areas overlap each other, so that an overlapping portion of said each adjacent pair is commonly used by said each adjacent pair;means for detecting a current focal length of said photographic lens; andmeans for shifting at least one of said plurality of light receiving areas on each of said pair of line sensors in accordance with said current focal length detected by said detecting device such that an amount of said overlap between said at least one of said plurality of light receiving areas and an adjacent one of said plurality of said light receiving areas changes in accordance with a variation in said current focal length, wherein each of said plurality of said light receiving elements included in said at least one of said plurality of light receiving areas shifted by said shifting device is used to convert received light into an electrical signal which is integrated to output image data.