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:
Aug. 17, 2010
Filed:
Oct. 31, 2007
Katsuhiro Seo, Kanagawa, JP;
Takashi Kobayashi, Kanagawa, JP;
Yoshiki Okamoto, Kanagawa, JP;
Sony Corporation, Tokyo, JP;
Abstract
The present invention can simplify the configuration of a polarization adjustment plate. According to the present invention, the crystal axis of the polarization adjustment wavelength plateis so arranged as to be turned up from the X-Y plane being an orthogonal plane with respect to the optical axis, and the wavelength dependence which the crystal material is originally provided with is largely expressed, and further the thickness 'ta' with respect to the optical axisis set up such that the phase difference Δ to be brought about at the beam center becomes low from 360°+180°=540° being a desired design value to irradiate the optical beam as the P-polarization by a predetermined difference value or 60°.