Eastman-kodak Company

John K Lynch

Kenneth Alan Parulski

Seiichi Mizukoshi

Masaki Izumi

Clay A Dunsmore

John J Uebelacker

A flash quench controller for a camera having a flash unit includes a light detector for producing a signal, an integrator for integrating the signal from the detector and producing an integrated signal, a comparator for comparing the integrated signal to a reference value, and means for quenching the flash unit when the integrated signal reaches the reference value. By using a pulse signal having a variable pulse width to programmably set the reference value, many different quench time values can be easily established. The flash unit may also be quenched by setting a maximum flash time value. The flash is automatically quenched if this flash time value is reached before the integrated signal level reaches the programmed reference value.

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Kendall, NY, United States of America

John K Lynch