Laser beam scanning apparatus

Details Laser beam scanning apparatus Laser beam scanning apparatus

1992-11-17

1993-09-14

Arnold, Bruce Y.

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359206, 359216, 2505781, G02B 2608

Patent

active

052454622

ABSTRACT:
A laser beam scanning apparatus having a laser beam generating section generating first and second laser beams, a rotatable polygonal mirror for deflecting the first and second laser beams to form scanning lines each extending in a main scanning direction on a beam receiving surface and an optical system for imaging the first and second laser beams deflected by the polygonal mirror on the beam receiving surface. Each of the first and second laser beams impinges on the reflective face of the polygonal mirror at an angle with respect to an optical axis in a sub-scanning direction perpendicular to the main scanning direction. The following condition is satisfied:

REFERENCES:
patent: Re34156 (1993-01-01), Morimoto
patent: 4637679 (1987-01-01), Funato
patent: 5054866 (1991-10-01), Tomita et al.
patent: 5093745 (1992-03-01), Kuroda

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