<p>A phase difference detector of the type capable of distinguishing a focused state by detecting relative positions of a pair of optical images obtained from an object comprises sensor means adapted to photoelectrically convert the pair of optical images and to output a first analog electrical signal corresponding to one of the optical images and a second analog electrical signal corresponding to the other optical image, the signals being generated by the photoelectric conversion, at a predetermined period and in a non-destructive manner, and analog arithmetic means for subjecting the pair of analog electrical signals output from the sensor means to a correlative arithmetic operation.</p>
申请公布号
EP0259887(A2)
申请公布日期
1988.03.16
申请号
EP19870113330
申请日期
1987.09.11
申请人
FUJI PHOTO FILM CO., LTD.
发明人
MIIDA, TAKASHI FUJI PHOTO FILM CO., LTD.;MURAYAMA, JIN FUJI PHOTO FILM CO., LTD.;OZAKI, NOZOMU FUJI PHOTO FILM CO., LTD.;TABEI, MASATOSHI FUJI PHOTO FILM CO., LTD.;KONDO, RYUJI FUJI PHOTO FILM CO., LTD.