The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 17, 2017
Filed:
Jul. 14, 2016
Applicants:
Chieko Hatashita, Isehara, JP;
Eiichi Hayashi, Atsugi, JP;
Go Takahashi, Kawasaki, JP;
Inventors:
Assignee:
RICOH COMPANY, LTD., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
G02B 26/08 (2006.01); G02B 13/00 (2006.01); G02B 1/04 (2006.01); G02B 26/12 (2006.01); G03G 15/043 (2006.01);
U.S. Cl.
CPC ...
G02B 13/0005 (2013.01); G02B 1/041 (2013.01); G02B 26/125 (2013.01); G03G 15/043 (2013.01);
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.