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:
Oct. 25, 2011
Filed:
Dec. 27, 2006
Shojiro Kawakami, Miyagi, JP;
Tetsuya Ogata, Kanagawa, JP;
Shojiro Kawakami, Miyagi, JP;
Tetsuya Ogata, Kanagawa, JP;
Ricoh Company, Inc., Tokyo, JP;
Abstract
It is an object of the present invention to provide an optical module which can extract only light components satisfying predetermined conditions, and an imaging device comprising the optical module. The optical module () comprises a first plate-like optical element () formed with a ¼ wavelength plate portion () and a −¼ wavelength plate portion () alternately jointed together at a joint portion (), and a second plate-like optical element () formed with a ¼ wavelength plate portion () and a −¼ wavelength plate portion () alternately jointed together at a joint portion (), wherein the first plate-like optical element () and the second plate-like optical element () are parallel, and the ¼ wavelength plate portion () of the first plate-like optical element () and the −¼ wavelength plate portion () of the second plate-like optical element () are overlapped across a gap ().