Optical scanning system

Details Optical scanning system Optical scanning system

1994-02-04

1995-09-26

Dzierzynski, Paul M.

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359217, 359219, 359662, G02B 2608

Patent

active

054538700

ABSTRACT:
An optical scanning system is provided which includes a light source, a scanning deflector which deflects a bundle of rays emitted from the light source, and a scanning lens system which converges the deflected bundle of rays onto an image surface to form an image. The scanning lens system has at least two lenses, wherein the lens closest to the image surface is a meniscus lens with a surface which is convex in the main scanning direction facing the image surface. A surface of the meniscus lens nearest to the scanning deflector is a deformed toric surface which is convex in a sub scanning direction facing the scanning deflector. The sub scanning direction is normal to the main scanning direction. The convexed toric surface has a radius of curvature which is determined independently of a radius of curvature in the main scanning direction.

REFERENCES:
patent: 4443055 (1984-04-01), Matsudka et al.
patent: 4756584 (1988-06-01), Takanashi
patent: 4818046 (1989-04-01), Kondo
patent: 4930850 (1990-06-01), Morimoto
patent: 5200850 (1993-04-01), Iizuka et al.
patent: 5251069 (1993-10-01), Iizuka

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