Light beam scanning device

Details Light beam scanning device Light beam scanning device

1980-06-13

1982-10-05

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250201, H01J 314

Patent

active

043529844

ABSTRACT:
A light beam scanning device in which a light beam is scanned over an image or recording surface at a constant velocity independent of beam position and disturbances in the drive to the system. A position detecting device produces a signal representing the position of the light beam over the surface with the light beam being scanned by an optical deflector device. A feedback loop such as a phase-locked loop controls the movement of the optical deflector in response to a signal produced by the position detecting device and a reference signal.

REFERENCES:
patent: 4140903 (1979-02-01), Clark
patent: 4178064 (1979-12-01), Mrdjen

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