Photography – With object illumination for exposure – Having artificial illumination termination control
Patent
1996-05-16
1997-10-28
Perkey, W. B.
Photography
With object illumination for exposure
Having artificial illumination termination control
G03B 1505
Patent
active
056825625
ABSTRACT:
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.
REFERENCES:
patent: 3840882 (1974-10-01), Kawasaki
patent: 3868701 (1975-02-01), Kawasaki
patent: 4012665 (1977-03-01), Nakamura et al.
patent: 4266163 (1981-05-01), Lloyd
patent: 4809030 (1989-02-01), Takagi et al.
patent: 4887118 (1989-12-01), Gaesky
patent: 5101335 (1992-03-01), Ludden et al.
patent: 5134431 (1992-07-01), Ishimura et al.
patent: 5138361 (1992-08-01), Iwamoto et al.
Dunsmore Clay A.
Izumi Masaki
Lynch John K.
Mizukoshi Seiichi
Parulski Kenneth A.
Eastman Kodak Company
Perkey W. B.
Woods David M.
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