Focusing device of camera

Abstract

Abstract PURPOSE:To miniaturize a camera and to attain quick and accurate focusing, by shifting a solid-state image pickup element along an optical axis for focusing based on the result of detection of focus with a focus detecting section. CONSTITUTION:A part of an image picked-up ray transmitted through a half mirror 17 is led to a range finding CCD23. Further, whether or not the focusing is attained, and whether front or rear focus, in case of out of focus, and the degree of the out of focus, are detected at a focus detecting circuit 24 with picture information received at the CCD23. Further, a signal in response to the result of detection at the circuit 24 is outputted to a control circuit 25 and the circuit 25 outputs a control voltage in response to a focus detecting signal. Thus, the element 6 is shifted along the optical axis for attaining focusing.

Inventors

• 👤 Nobutoshi Kihara
• 👤 木原　信敏
• 👤 Etsuro Saito
• 👤 悦朗 斉藤

Bibliographic Details