Optical element and scanning optical apparatus using the same

Details Optical element and scanning optical apparatus using the same Optical element and scanning optical apparatus using the same

1998-06-11

2000-11-28

Le, N.

Incremental printing of symbolic information

Light or beam marking apparatus or processes

Scan of light

347258, B41J 1514

Patent

active

061542458

ABSTRACT:
An optical element which is a resinous optical element has optical surfaces longitudinal in a main scanning direction. A shape in the main-scanning direction of an image-ineffective portion of at least one optical surface out of image-effective portions and image-ineffective portions of the both optical surfaces of the optical element includes a shape formed by adding a spline function to a function representing a shape in the main-scanning direction of the image effective portion. Thicknesses in the optical-axis direction in the image-ineffective portions are set by addition of the spline function.

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patent: 5436645 (1995-07-01), Uemura et al.
patent: 5541760 (1996-07-01), Iizuka
patent: 5557446 (1996-09-01), Kato et al.
patent: 5815301 (1998-09-01), Naiki et al.
patent: 5875051 (1999-02-01), Suzuki et al.

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