Light beam scanning device

Details Light beam scanning device Light beam scanning device

1988-08-08

1990-03-13

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

350 68, H01J 314

Patent

active

049085115

ABSTRACT:
A light deflector such as a polygon mirror deflects a synchronizing light beam and a scanning light beam which are applied thereto at different angles. A first focusing optical system is disposed between the light deflector and an object to be scanned by the scanning light beam for focusing the scanning light beam on the object. A synchronizing signal generator including a reference grating plate generates a synchronizing signal from the synchronizing light beam applied to the reference grating plate. A second focusing optical system is disposed between the first focusing optical system and the reference grating plate for focusing the synchronizing light beam applied through the first focusing optical system on the reference grating plate. Image information is read from the object or read on the object based on the synchronizing signal.

REFERENCES:
patent: 3573849 (1971-04-01), Herriot et al.
patent: 4243294 (1981-01-01), Noguchi
patent: 4408826 (1983-10-01), Ike
patent: 4429220 (1984-01-01), Noguchi

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