Title:
入れ子及び金型
Document Type and Number:
Japanese Patent JP4827406
Kind Code:
B2
Abstract:
To provide a plastic optical element which, while maintaining the present condition of the optical performance, is reduced in optical appearance defects and improved in mass-productivity, and an optical scanner having this and an image formation device equipped with this.
In a long-form plastic optical element A having brims 2a to the main scanning direction, the light effective portion 1a and part of the brims 2a are formed with the same insert 3.
COPYRIGHT: (C)2006,JPO&NCIPI
Inventors:
Eiichi Hayashi
Application Number:
JP2004366856A
Publication Date:
November 30, 2011
Filing Date:
December 17, 2004
Export Citation:
Assignee:
株式会社リコー
International Classes:
B29C33/42; B29C45/37; G02B3/00; B29L11/00
Domestic Patent References:
| JP6059103A | ||||
| JP2003326566A | ||||
| JP4310717A |
Attorney, Agent or Firm:
Hitoshi Suzuki