Exposure computation system

Details Exposure computation system Exposure computation system

1975-12-16

1977-09-13

Adams, Russell E.

354 37, 354 38, 354 41, 354 43, 354 60R, 354 60A, G03B 708

Patent

active

040486435

ABSTRACT:
A diaphragm aperture value which has been set is transformed into corresponding frequency information. A local oscillator starts sweeping upon pushing of the shutter button. The output of the local oscillator and the frequency information are inputted to a mixer, and the output of the mixer is fed to a filter circuit, whose center frequency is variable according to the luminance information of an object to be photographed. Only a specific output frequency of the mixer passes through the filter circuit, and the output of the filter circuit generates a control signal which closes the shutter at a suitable diaphragm aperture time.

REFERENCES:
patent: 3712191 (1973-01-01), Nobusawa
patent: 3827060 (1974-07-01), Nobusawa
patent: 3829866 (1974-08-01), Nobusawa
patent: 3882510 (1975-05-01), Nobusawa

Affiliated with

Also associated with

Rating

Exposure computation system does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Exposure computation system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Exposure computation system will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-277695