Prebias for digital light integrator

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Details

354 51, 354 60R, G03B 7083, G03B 7087

Patent

active

042932084

ABSTRACT:
In an exposure control system in which the instant in which the scene light is first admitted to a film plane from a shutter blade mechanism at the commencement of an exposure interval must be precisely and accurately determined for subsequently controlling the instant of flash fire and/or other exposure control functions utilizing digital scene light integrating techniques, there is provided an arrangement for prebiasing the light integrator to provide an output therefrom within an operative range of voltages immediately prior to detection of first light at commencement of the exposure interval in order to eliminate any potential errors which might otherwise result in the detection of first light at the commencement of the exposure interval or any other scene light related measurement resulting from the integration lead time required for the digital type of light integrating arrangement to reach its operative range of voltages.

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