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:
Jun. 27, 2006
Filed:
Sep. 22, 2003
Applicant:
Shuji Akiya, Saitama, JP;
Inventor:
Shuji Akiya, Saitama, JP;
Assignee:
Fujinon Corporation, Saitama, JP;
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03B 21/00 (2006.01); G03B 5/04 (2006.01);
U.S. Cl.
CPC ...
Abstract
A cross dichroic prism for color decomposition includes a blue-reflecting dichroic film for reflecting a blue light component and a red-reflecting dichroic film for reflecting a red light component. Each dichroic film comprises lower and higher refractive index materials alternately laminated on a prism base. The cross dichroic prism satisfies 1.105≦N/N≦1.450 if N≦N, or 1.118≦N/N≦1.150 if N>N, where Nis the refractive index of the prism base, Nis the refractive index of the higher refractive index material, and Nis the refractive index of the lower refractive index material.