Exposure control device

Details Exposure control device Exposure control device

1977-05-23

1978-07-25

Adams, Russell E.

Boots, shoes, and leggings

354 50, 354 60R, 354 60A, 364525, G03B 708

Patent

active

041033078

ABSTRACT:
An automatic exposure control device to convert the analogue value of an object to be photographed, to digital value for controlling appropriate exposure value using said digital value. The device has a photo-sensing means to sense the light from the object digitally, a photographing information setting means to digitally set various photographing information such as film sensitivity, diaphragm aperture value, shutter speed, etc., a calculating means to digitally calculate diaphragm aperture value, shutter speed value means corresponding to the output of the above mentioned photo-sensing means and the photographing information setting means, a function detecting and setting means to detect and set each functional state, and a sequence control means having an instructional function for various calculating operations to control sequence-wise the computation operation of the above mentioned computation device, corresponding to the output of said function detecting and setting means, wherein the sequence control means determines the photographing mode corresponding to the output of the above mentioned function detecting and setting means. At the same time, appropriate exposure value is calculated by the calculating means in accordance with the content of the above mentioned photographing means and the output of the photo-sensing means is converted to digital value.

REFERENCES:
patent: 3842587 (1974-10-01), Strauss et al.
patent: 3928858 (1975-12-01), Sakurada et al.

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