| 摘要 |
PROBLEM TO BE SOLVED: To make a focus detector usable for a single lens reflex camera and also for a lens shutter system camera by switching a photodetecting area to a using area capable of being monitored by every photodetecting means and a pair of photodetecting means. SOLUTION: In the case of the single lens reflex camera, the image data groups of respective line sensors 13A to 13C are divided into pixel data groups in two areas, one area is regarded as a standard area, the other area is regarded as a reference area. The distance between a pair of object images formed in the standard area and the reference area is obtained by using the image data groups included in respective areas, then, a defocusing amount is obtained. On the other hand, in the case of the lens shutter camera, the line sensor 13B positioned at the center is not used, but a pair of line sensors 13A and 13C positioned at both ends are used. That is, the position of the pair of object images formed by respective line sensors 13A and 13C and the distance between them are detected based on the pixel data of a pair of line sensors 13A and 13C, then, a distance to the object is obtained by introducing a triangulation method. |
