Camera capable of automatic focal distance correction utilizing

Details Camera capable of automatic focal distance correction utilizing Camera capable of automatic focal distance correction utilizing

1994-04-14

1996-05-07

Perkey, W. B.

354187, G03B 500, G03B 1704

Patent

active

055151299

ABSTRACT:
In a camera of the present invention, an extension amount of a focusing lens is determined from a plural kind of table data for determining the extension amount of the lens from information on the distance to an object and information on the set focal distance.
The camera has a storage unit for storing the zooming direction of an optical system during zooming, a selection unit for selecting data from the plural kind of table data on the basis of the contents stored in the storage unit, and an arithmetic unit for computing an extension amount of a focusing lens on the basis of the data selected by the selection unit. The camera also provides correction or backlash due to external forces by driving the photographic optical system for a given interval.

REFERENCES:
patent: 4914464 (1990-04-01), Azuma et al.
patent: 4936664 (1990-06-01), Haraguchi et al.
patent: 5196963 (1993-03-01), Sato et al.

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