Title: Scanner optics and image formation apparatus using the same
Application Number: 95105525 Application Date: 1995.05.23
Publication Number: 1120174 Publication Date: 1996.04.10
Approval Pub. Date: 2000.02.23 Granted Pub. Date: 2000.02.23
International Classifi-cation: G02B26/12
Applicant(s) Name: Matsushita Electric Industrial Co., Ltd. Address:
Inventor(s) Name: Kazutake Boku;Motonobu Yoshikawa;Yoshiharu Yamamot
Attorney & Agent: JIAN WEI
Abstract:
    The scanner optics of this invention includes a condensing lens arrangement composed of a first spherical 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.
Time: 6
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