Range finder

Abstract

Abstract PURPOSE:To obtain a distance to an object for enabling focusing of a camera, together with an improvement in accuracy and realization of miniaturization and light weight, by using a detecting element for the object position consisting of a semiconductor. CONSTITUTION:Light from a light source LS is projected as a spot light on an object O through an optical system L1, and the reflected light is detected with a semiconductor position detecting element PS2 placed at the image-forming position of an optical system L2. From the PSD, output currents I1 and I2 according to the position of the center of gravity of brightness are taken out as signals, and operated and processed in a position detecting and processing circuit PDC, and thereby outputted as a signal corresponding to the distance D0 to the object O.

Inventors

• 👤 Haruhiko Momose
• 👤 Toshiaki Takahashi
• 👤 Yasushi Hoshino

Bibliographic Details