Phase difference detecting type autofocusing device including an

Details Phase difference detecting type autofocusing device including an Phase difference detecting type autofocusing device including an

1992-06-25

1994-02-08

Perkey, W. B.

C03B 1336

Patent

active

052852342

ABSTRACT:
A phase difference detecting type autofocusing device capable of selectively focusing a desired one of a plurality of subjects within a field of view, by using a simple structure. The phase difference detecting type autofocusing device includes an optical system having first and second lenses, the first and second lenses having the same focal length and disposed on a first plane with the optical axes of the lenses being set in parallel. A plurality of first photosensors are disposed on a second plane in parallel with the first plane, for converting information of images focused by the first lens into electric signals; and a plurality of second photosensors are disposed on the second plane at positions covered by the second lens, for converting information of images focused by the second lent into electric signals. Each second photosensor is spaced apart in the same direction by the same distance from a corresponding one of the plurality of first photosensors.

REFERENCES:
patent: 4640613 (1987-02-01), Yokoyama et al.
patent: 5113215 (1992-05-01), Nishibe
patent: 5168299 (1992-12-01), Taniguchi et al.

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