Scanner optics and image formation apparatus using the same

Details Scanner optics and image formation apparatus using the same Scanner optics and image formation apparatus using the same

1995-05-19

1998-04-28

Phan, James

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359206, 359216, 359217, G02B 2608

Patent

active

057452776

ABSTRACT:
The scanner optics of this invention includes a condensing lens arrangement composed of a first aspherical lens having a positive refractive power and a convex meniscus surface on the side of the scanning surface and a second toric lens of which incident surface is saddle toroidal where a point on the incident surface has a greater radius of curvature in the sub-scanning direction as the point is farther from the optical axis in the scanning direction. A laser light flux emitted from a light source is deflected and scanned by a polygon mirror so as to form an image on a scanning surface via the condensing lens arrangement.

REFERENCES:
patent: 4379612 (1983-04-01), Matsuoka et al.
patent: 4955682 (1990-09-01), Yamaguchi et al.
patent: 5005928 (1991-04-01), Suzuki et al.
patent: 5157532 (1992-10-01), Yoshikawa et al.
patent: 5189546 (1993-02-01), Iizuka

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