Electronic memory means for adjusting camera electric circuits

Details Electronic memory means for adjusting camera electric circuits Electronic memory means for adjusting camera electric circuits

1990-04-11

1992-12-08

Gellner, Michael L.

354410, G03B 4079

Patent

active

RE0341401

ABSTRACT:
Apparatus for adjusting a camera electric circuit employs a non-volatile memory element for electrically storing and reading data, takes out digitized compensation data from the non-volatile memory element during a digital calculation process, and, after the calculation including the compensation data, controls an exposure control or an exposure display circuit of the camera in accordance with the calculated output, thereby dispensing with conventional analog adjustment. The compensation data may be obtained through the use of a test instrument by comparing test results against results obtained by the camera calculator or through the use of comparing a previously standarized shutter speed with the shutter speed determined by the camera calculator. The compensation value can be used to provide a corrected display. A separate compensation value for an aperture deviation can also be stored. The stored data is retained unchanged by removal of a jumper control.

REFERENCES:
patent: 4345825 (1982-08-01), Matteson et al.
patent: 4373810 (1983-02-01), Shreve
patent: 4427276 (1984-01-01), Feinerman et al.
patent: 4455068 (1984-06-01), Izuhara

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