Laser beam recording system

Details Laser beam recording system Laser beam recording system

1979-01-15

1980-07-08

Miller, Jr., George H.

Recorders

Thermal recording

346108, G01D 1510, G01D 942

Patent

active

042120187

ABSTRACT:
In a laser beam recording system employing a rotating polygonal mirror for deflecting a recording light beam and a read-out light beam for synchronization, a linear encoder is used to generate a video clock signal in synchronization with the photoelectric pulse signal obtained through the linear encoder. In the video clock signal generator, a clock signal is divided into 1
where n is an integral number to provide a reference pulse signal to be compared with the photoelectric pulse signal. The displacement of the phase of the photoelectric pulse signal from the reference pulse signal is detected and is corrected by a phase comparator. Thus, a video clock signal having a frequency of n-times as large as that of the photoelectric pulse signal is generated.

REFERENCES:
patent: 3573849 (1971-04-01), Herrit et al.
patent: 4002829 (1977-01-01), Hutchison
patent: 4123780 (1978-10-01), Honjo

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