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. 30, 2007
Filed:
Jul. 29, 2004
Tomokazu Taguchi, Sakai, JP;
Kazuyuki Nishi, Sakai, JP;
Takuji Hatano, Suita, JP;
Kazuhiko Ishimaru, Kaizuka, JP;
Tomokazu Taguchi, Sakai, JP;
Kazuyuki Nishi, Sakai, JP;
Takuji Hatano, Suita, JP;
Kazuhiko Ishimaru, Kaizuka, JP;
Konica Minolta Opto, Inc., Tokyo, JP;
Abstract
A polarizing beam splitter having a film made of a high-refractivity material and a film made of a low-refractivity material alternately stacked on a substrate. When an incidence angle with respect to a film surface in a particular wavelength is set as θ (°), the following conditional expressions are satisfied in the range of 40≦θ≦50(°):0.99≦Rs(45)/Rs(θ)≦1.04, 0.96≦Tp(45)/Tp(θ)≦1.05, where Rs(θ): reflectivity of polarized light s at a θ incidence; Tp(θ) transmissivity of polarized light p at a θ incidence angle; Rs(45): reflectivity of polarized light s at a 45° incidence angle; and, Tp(45) transmissivity of polarized light p at a 45° incidence angle. The transmissivity of the polarized light p does not decrease and the reflectivity of the polarized light s is nearly 100% with respect to even a broad angle region.