Programmable exposure control systems for a camera

Details Programmable exposure control systems for a camera Programmable exposure control systems for a camera

1979-04-13

1982-03-23

Hix, L. T.

354 50, 354 60R, G03B 708

Patent

active

043209440

ABSTRACT:
In a programmed exposure control system a signal indicative of the aperture value or the time value is automatically produced in accordance with a programmed relationship with a signal including information of the light measurement of an object. The former signal is optionally stored and either the aperture size or the exposure time is determined in accordance with the latter signal and the stored signal. The other of the aperture size or the exposure time is determined commensurate with the previously determined aperture size or exposure time.
Both the aperture size and exposure time are adapted to be automatically controlled according to a predetermined program in response to light measurement. An aperture value signal and a time value signal are produced according to light measurement in a programmed relationship. Alternatively, a signal indicative of either the aperture value or time value according to the light measurement may be produced and the other of either the aperture value or the time value may be determined in accordance with the produced signal and the light measurement. The aperture value or the time value may be optionally stored and the non-stored value may be determined from the stored value and the light measurement information. At least either one of the aperture value or the time value may be optionally changed to provide a pre-selection of the values in either the aperture-priority or time-priority exposure modes.

REFERENCES:
patent: 4103307 (1978-07-01), Shinoda et al.

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