Camera with autofocusing device

Details Camera with autofocusing device Camera with autofocusing device

1981-12-03

1990-03-20

Perkey, W. B.

354408, 354469, 35419511, 354268, G03B 300, G03B 708, G03B 1738

Patent

active

RE0331856

ABSTRACT:
A camera comprises an exposure meter having a pointer deflected to a position dependent upon the brightness level of an object to be photographed, a scanning mechanism actuated by a camera release to scan the position of the deflected pointer with the scanning result being introduced to a lens aperture mechanism, an automatic focus adjusting device actuated by the camera release to control the focusing of an objective lens in accordance with a photoelectrically sensed distance from the camera to the object, and a control mechanism. Since the photoelectric elements in measuring the object distance have a relatively long time lag, the control mechanism functions upon actuation of the camera release to defer the actuation of the scanning mechanism and the autofocusing device, pending completion of the detection of the object distance. In this manner, an exposure setting accurately corresponding to the prevailing lighting conditions is obtained. When the light value is too low to assure the satisfactory operation of the automatic focus adjusting device, the camera may be switched to the flash mode where the objective lens and the aperture mechanism are automatically set in a pan-focus condition in response to actuation of the camera release.

REFERENCES:
patent: 3547017 (1970-12-01), Harvey
patent: 3617128 (1971-11-01), Harvey
patent: 3618499 (1971-11-01), Harvey
patent: 3917395 (1975-11-01), Ogawa
patent: 3945023 (1976-03-01), Stauffer
patent: 4002899 (1977-01-01), Stauffer
patent: 4031383 (1977-06-01), Hosoe et al.
patent: 4080531 (1978-03-01), Stauffer
patent: 4146316 (1979-03-01), Osawa
patent: 4154517 (1979-05-01), Tamura et al.
patent: 4238153 (1980-12-01), Imura

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