Strobe control circuit for flash photography

Details Strobe control circuit for flash photography Strobe control circuit for flash photography

1985-03-04

1988-09-13

Perkey, W. B.

354137, G03B 1505

Patent

active

047713097

ABSTRACT:
A strobo control circuit for a program shutter which opens or closes sectors by means of a stepping motor, wherein a data ROM (read-only memory) is accessed in accordance with a value obtained by computing a code representative of a distance to a subject, a film speed and so forth, and after the data stored in the ROM is set in a timer circuit, the timer is started synchronously with start of the stepping motor to produce a strobo trigger signal upon termination of the timer action.

REFERENCES:
patent: Re31034 (1982-09-01), Biber et al.
patent: 3738240 (1973-06-01), Mitani et al.
patent: 3836922 (1974-09-01), Hasegawa et al.
patent: 4251141 (1981-02-01), Stemme et al.
patent: 4317624 (1982-03-01), Shenk
patent: 4354748 (1982-10-01), Grimeo et al.
patent: 4534638 (1985-08-01), Hirohata et al.

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