Title :
Control of lens position in auto-focus cameras using semiconductor laser range finder
Author :
Yoshida, Yutaka ; Shinohara, Shigenobu ; Ikeda, Hinata ; Tada, Ken-Ichi ; Yoshida, Hiroyuki ; Nishide, K. ; Sumi, Masao
Author_Institution :
Shizuoka Univ., Hamamatsu, Japan
Abstract :
It is proposed that a novel infrared range finder be used to get a just-focusing signal for an autofocus (AF) system employing both a measured distance to a moving object and its speed, and to control the lens position of video and single-lens reflex (SLR) cameras using the AF system. Some clear photographs of a moving object have been obtained by an SLR camera using the proposed AF system
Keywords :
cameras; colour photography; focusing; laser ranging; video cameras; AF system; SLR cameras; auto-focus cameras; infrared range finder; just-focusing signal; lens position; moving object; semiconductor laser range finder; video cameras; Cameras; Control systems; Focusing; Infrared detectors; Lenses; Object detection; Optical control; Phase detection; Power measurement; Semiconductor lasers;
Conference_Titel :
Circuits and Systems, 1991., Proceedings of the 34th Midwest Symposium on
Conference_Location :
Monterey, CA
Print_ISBN :
0-7803-0620-1
DOI :
10.1109/MWSCAS.1991.252180
