Focus detecting apparatus with gaze detection and focus area cha

Details Focus detecting apparatus with gaze detection and focus area cha Focus detecting apparatus with gaze detection and focus area cha

1993-07-14

1994-05-10

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controls its own optical systems

354408, G01J 120

Patent

active

053110048

ABSTRACT:
A focus detecting apparatus capable of changing a focus detecting region in a photographing image field by the use of a set of focus detecting optical systems and a pair of sensor light receiving portions is provided with a focus detecting optical system for setting the focus detecting region on the predetermined focal plane of a phototaking optical system, directing a light beam from an object passed through the focus detecting region to photoelectric converting means fixed at a predetermined location, and forming an object image, region changing means provided in the optical path from the focus detecting region to the photoelectric converting means for changing the focus detecting region on the predetermined focal plane, and calculating means for calculating the focus adjusted state of the phototaking optical system in the focus detecting region after changed by the region changing means, on the basis of the output signal of the photoelectric converting means.

REFERENCES:
patent: 5160834 (1992-11-01), Moriyama

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