Apparatus for photoelectrical detection of image displacement

Abstract

Abstract PURPOSE:To attain the simplification of adjustment and the enhancement of productivity and accuracy, by mounting a memory means of difference correction data corresponding not only to the relative position of two respective photoelectric element arrays and the respective light image on said arrays but also the places of said arrays and a means for correcting detection output on the basis of said data. CONSTITUTION:A pair of photoelectric element arrays 105, 106 each comprising CCD are parallelly arranged to a photoelectric conversion part 201 and the image of the same subject is formed through a focus detection optical system and the image outputs of both arrays 105, 106 are successively subjected to A/D conversion in a time series manner by an A/D converter 202 to be stored in a data memory means 204. Then, the relative shift amount of both image outputs is calculated by an image shift operation means 205 and further corrected on the basis of correction data due to the measured result at the manufacturing time of a correction data memory means 207 by a correction operation means 206 and the corrected shift amount is converted to a defocus amount while a focus regulation state is displayed through a display drive means 208 and a photographing lens is driven at a focus matched position.

Inventors

• 👤 Takeshi Utagawa
• 👤 健 歌川
• 👤 Yosuke Kusaka
• 👤 洋介 日下

Bibliographic Details