Laser optical system

Details Laser optical system Laser optical system

1994-10-13

1997-04-08

Phan, James

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359206, 359217, 359218, 359219, G02B 2608

Patent

active

056193637

ABSTRACT:
A laser optical system for scanning a laser beam using a rotary polygonal mirror made of plastics. In the laser optical system, a portion close to the edge on the side along the rotary direction of the mirror surface of the rotary polygonal mirror made of plastics is not used as an effective reflecting surface since the accuracy of this portion is difficult to be stabilized because of the problems caused in the process of molding. Due to the foregoing, a laser beam is always reflected on the effective reflecting surface close to the center of the rotary polygonal mirror, the accuracy of which is high. Therefore, it is possible to reduce the unevenness of writing in the laser optical system.

REFERENCES:
patent: 3944323 (1976-03-01), Starkweather
patent: 4121883 (1978-10-01), Goshima et al.
patent: 4143403 (1979-03-01), Ohnishi
patent: 4274703 (1981-06-01), Fisli
patent: 4770517 (1988-09-01), Sakuma

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