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


Application Number: 00108918
Application Date: 2000.05.19
Publication Number: 1274866
Publication Date: 2000.11.29
Priority Information: 1999/5/20 JP 139677/1999
International: G02B7/32;G03B13/36
Applicant(s) Name: Olympus Optical Ltd.
Address:
Inventor(s) Name: Kanadaichi Goshi
Patent Agency Code: 11038
Patent Agent: wang sibeng
Abstract A pair of integration-type light-receiving sensors receive the light from subjects via a taking optical system 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 image signal obtained by causing the steady-state light removing section to remove the steady-state light component from the subject image signal. A subject select section causes the first distance-measuring section to make distance measurements for a specific time, performs operation on the resulting image signal using a specific correction function, and thereby selects a subject whose distance is to be measured. A second distance-measuring section measures the distance to the subject whose distance is to be measured which has been selected by the subject select section, on the basis of the subject image signal obtained by the pair of integration-type light-receiving sensors, while the light projecting section is not projecting light onto the subjects.