Scanning optics

Details Scanning optics Scanning optics

1995-12-26

1998-06-16

Sugarman, Scott J.

Optical: systems and elements

Lens

High distortion lens

359206, G02B 2608, G02B 302

Patent

active

057680280

ABSTRACT:
Single convex lens element has a positive power in both the main and sub-scanning directions on the surface which is the closer to the surface to be scanned and which is anamorphic such that any section taken through a plane that is parallel to the central optical axis and which is normal to the main scanning direction provides a generally constant surface geometry along the length of that surface. This lens ensures not only the production of a good image plane and satisfactory f.theta. characteristics in the main scanning direction but also the effective correction of the curvature of the field in the sub-scanning direction.

REFERENCES:
patent: 4695132 (1987-09-01), Sakuma
patent: 5153767 (1992-10-01), Makino

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