Title:
プラスチック光学素子、光走査装置及び画像形成装置
Document Type and Number:
Japanese Patent JP5845757
Kind Code:
B2
Abstract:
A plastic optical element for an optical system of an optical scanner includes a plurality of optical effective portions through which a plurality of light beams transmit, respectively, formed on at least one of an incidence surface and an exit surface in a sub scan direction, and an optical ineffective portion formed between neighboring optical effective portions not to allow the light beams to transmit therethrough, and including an area in which a local contraction occurs at a time of resin molding.
Inventors:
Chieko Hatta
Eiichi Hayashi
Takahashi Tsuyoshi
Eiichi Hayashi
Takahashi Tsuyoshi
Application Number:
JP2011201744A
Publication Date:
January 20, 2016
Filing Date:
September 15, 2011
Export Citation:
Assignee:
株式会社リコー
International Classes:
G02B26/10; B41J2/47; G02B3/08; G02B13/18; G02B26/12; H04N1/113
Domestic Patent References:
| JP2011081369A | ||||
| JP2006133709A | ||||
| JP2010055056A | ||||
| JP2012194294A |
Attorney, Agent or Firm:
Tamio Nishiwaki
Previous Patent: プロピレン系樹脂シートおよびそれを用いた加熱処理用包装体
Next Patent: SEPARATION AND CONCENTRATION OF BASTNAESITE
Next Patent: SEPARATION AND CONCENTRATION OF BASTNAESITE