Method of generating synchronizing signals

Details Method of generating synchronizing signals Method of generating synchronizing signals

1986-08-22

1988-01-12

Coles, Sr., Edward L.

Facsimile and static presentation processing

Facsimile

Recording apparatus

258285, 258208, H04N 104

Patent

active

047195150

ABSTRACT:
A synchronizing signal is generated in relation to the scanning of a recording medium with a scanning light beam emitted from a scanning light source and deflected by a light deflector. A synchronizing-signal generating laser beam is emitted from a synchronizing-signal generating laser source, and deflected by the light detector in synchronous relation to the deflection of the scanning light beam. The synchronizing-signal generating laser beam deflected by the light detector is applied back to the synchronizing-signal generating laser source at least once when the synchronizing-signal generating laser beam is deflected through a prescribed angle during one scanning cycle. A change in the output power of the synchronizing-signal generating laser source which is caused upon application of the synchronizing-signal generating laser beam back to the synchronizing-signal generating laser source, is detected for thereby generating the synchronizing signal.

REFERENCES:
patent: 3937883 (1976-02-01), Tanimoto
patent: 4414583 (1983-11-01), Hooker, III
patent: 4559562 (1985-12-01), Kramer
patent: 4571623 (1986-02-01), Schoon

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