Focus detecting device for camera

Details Focus detecting device for camera Focus detecting device for camera

1982-06-16

1984-09-25

Perkey, William B.

354402, G03B 1318

Patent

active

044732872

ABSTRACT:
Focus detecting device comprises a focus detecting optical system for guiding the light from an object onto a focus detecting plane, focus detecting means for identifying the focusing state from the image of the object formed on the focus detecting plane, means for generating a signal corresponding to the controlled actual F-number of the photographic optical system, means for generating a correction signal corresponding to the displacement of the optimum image plane of the photographing optical system according to the change of the controlled F-number, and means for correcting the output signal of the focus detecting means according to the correction signal.

REFERENCES:
patent: 4168116 (1979-09-01), Goldberg
patent: 4344679 (1982-08-01), Yagi et al.

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