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:
Apr. 14, 2009
Filed:
Sep. 13, 2006
Yasumasa Sawai, Yamatotakada, JP;
Tomokazu Taguchi, Osaka, JP;
Yasuyuki Nomura, Izumi, JP;
Konica Minolta Opto, Inc., Hachioji-Shi, JP;
Abstract
A dichroic film formed on a prism base member contains 10% by volume or more of a high-thermal-conductivity substance having a thermal conductivity of 20 W/mK or more at a temperature of 300 K. Preferably, the dichroic film is composed of high- and low-refractive-index layers laid alternately on one another, and the low-refractive-index layers contain 20% by volume or more of the high-thermal-conductivity substance. For lower angle-of-incidence dependence and higher light use efficiency, preferably, the following conditions: N≧1.58 and N/N≧1.33, where Nrepresents the refractive index of the low-refractive-index layers, and Nrepresents the refractive index of the high-refractive-index layers.