Correct exposure annunciator circuit

Details Correct exposure annunciator circuit Correct exposure annunciator circuit

1975-08-11

1976-09-07

La Roche, Eugene

Electric lamp and discharge devices: systems

Condenser in the supply circuit

Condenser in shunt to the load device and the supply

315134, 315135, 315151, 315159, H05B 4132, G01J 116

Patent

active

039796396

ABSTRACT:
An electronic flash apparatus terminates the light flash when light received from the subject has reached a predetermined level. The light terminating means includes a terminating capacitor which is discharged during the termination of the flash. Annunciator control signal generating means senses when the terminating capacitor is being recharged, and produces an annunciator control signal. An annunciator receives the annunciator control signal and provides an indication that the light terminating means has terminated the flash.

REFERENCES:
patent: 3814985 (1974-06-01), Pecher et al.

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