Invention Grant
- Patent Title: Camera having AF function
- Patent Title (中): 相机具有AF功能
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Application No.: US10768633Application Date: 2004-01-30
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Publication No.: US07405762B2Publication Date: 2008-07-29
- Inventor: Osamu Nonaka , Minoru Hara
- Applicant: Osamu Nonaka , Minoru Hara
- Applicant Address: JP Tokyo
- Assignee: Olympus Corporation
- Current Assignee: Olympus Corporation
- Current Assignee Address: JP Tokyo
- Agency: Straub and Pokotylo
- Agent John C. Pokotylo
- Priority: JP2003-027361 20030204
- Main IPC: G03B13/00
- IPC: G03B13/00 ; G03B3/00 ; G03B13/18 ; G03B13/32 ; G03B7/099 ; G03B3/10 ; G03B13/34 ; H04N5/232 ; G02B7/04 ; G02B21/00 ; G02B7/28 ; G01B9/04

Abstract:
A camera having an electronic image pickup element and a distance-measuring circuit that uses light signals obtained from light images of a plurality of distance-measuring areas set in a photographing screen to select a main subject and measure the distance to the subject. The camera has a focusing component, operating when the position of the main subject cannot be identified by the distance-measuring circuit, to divide the photographing screen into a plurality of areas to identify an area in which the main subject is present on the basis of a luminance distribution obtained from the areas other than those overlapping the distance-measuring areas. The focusing component focuses a photographing lens on the position of the highest contrast signal while scanning the lens position of the photographing lens.
Public/Granted literature
- US20040183939A1 Camera having AF function Public/Granted day:2004-09-23
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