Auto focusing light device

摘要

An auto focusing light device detachably mounted on a camera has a plurality of photoelectric conversion elements arranged in a unidimensional direction and detects the focusing condition of a photographic lens in accordance with the output of the plurality of photoelectric conversion elements. The device comprises a plurality of light-emitting elements arranged in a unidimensional direction, and an optical projection system for projecting images of the plurality of light-emitting elements on an object in such a manner that the direction of arrangement of the images of the plurality of light-emitting elements is substantially perpendicular to the direction of arrangement of the plurality of photoelectric conversion elements.