Multi-point automatic focusing range-finding system with wide range-finding area


Application Number: 00108919
Application Date: 2000.05.19
Publication Number: 1274867
Publication Date: 2000.11.29
Priority Information: 1999/5/20 JP 139675/1999; 1999/5/20 JP 139676/1999; 1999/5/20 JP 139681/1999; 1999/5/20 JP 139682/1999
International: G02B7/32;G03B13/36
Applicant(s) Name: Olympus Optical Ltd.
Address:
Inventor(s) Name: Kanadaichi Gosni
Patent Agency Code: 11038
Patent Agent: wang sibeng
Abstract A pair of integration-type light-receiving sensors receive the light from subjects and produce a subject image signal. A light projecting section projects light onto the subjects. A steady-state light removing section obtains an image signal by removing the steady-state light component from the subject image signal the pair of integration-type light-receiving sensors produces, while the light projecting section is projecting light onto the subjects. A first distance-measuring section measures a subject distance on the basis of the subject image signal from the pair of integration-type sensors. A subject position estimating section causes the first distance-measuring section to make distance measurements for a specific time and, on the basis of the resulting reflected light image signal, estimates the position of the main subject. A second distance-measuring section measures subject distances in the distance-measuring area corresponding to the position of the main subject estimated by the subject position estimating section, on the basis of the reflected-light image signal obtained by the pair of integration-type light-receiving sensors, while the light projecting section is not projecting light onto the subjects.