Camera with improved lens drive during switching of multiple foc

Details Camera with improved lens drive during switching of multiple foc Camera with improved lens drive during switching of multiple foc

1994-12-22

1996-09-10

Perkey, W. B.

G03B 1336

Patent

active

055550681

ABSTRACT:
A camera having multiple focal point detection areas which are individually selectable to focus a subject in a respective, selected focal point detection area. The camera includes a photographic lens and a focus adjustment unit. The focus adjustment unit drives the photographic lens to focus the subject in a selected focal point detection area by (a) calculating a sequence of defocus amount corresponding, respectively, to sequential points in time, each defocus amount corresponding to a respective focal point detection area selected at the corresponding point in time, and (b) driving the photographic lens to focus the subject based on the sequence of defocus amounts, irrespective of whether the selected focal point detection area has been switched to a different focal point detection area during the sequential points in time.

REFERENCES:
patent: 5128705 (1992-07-01), Someya et al.
patent: 5296888 (1994-03-01), Yamada

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