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:
Feb. 12, 2013
Filed:
Aug. 04, 2009
Hiroyoshi Funato, Kanagawa, JP;
Kazunori Bannai, Kanagawa, JP;
Daisuke Imaki, Kanagawa, JP;
Yoshinori Hayashi, Kanagawa, JP;
Makoto Hirakawa, Kanagawa, JP;
Hiroyoshi Funato, Kanagawa, JP;
Kazunori Bannai, Kanagawa, JP;
Daisuke Imaki, Kanagawa, JP;
Yoshinori Hayashi, Kanagawa, JP;
Makoto Hirakawa, Kanagawa, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
P-polarized light beam passing through an fθ lens passes through a polarization beam splitter, is converted into S-polarized light beam by a quarter-wave plate and a reflecting mirror, re-enters the polarization beam splitter, and is reflected at the polarization beam splitter in the −Z direction. An optical path of a light beam between a polygon mirror and the fθ lens, between the fθ lens and the polarization beam splitter, between the polarization beam splitter and the quarter-wave plate, between the quarter-wave plate and a reflecting mirror, between the reflecting mirror and the quarter-wave plate, and between the quarter-wave plate and the polarization beam splitter are in the same plane.