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. 20, 2010
Filed:
Dec. 27, 2006
Hitoshi Nakanishi, Kanagawa, JP;
Hitoshi Nakanishi, Kanagawa, JP;
Sony Corporation, Tokyo, JP;
Abstract
A prism optical system including an optical low-pass filter disposed on an incident side of a luminous flux, and a prism arranged to perform a color separation to a plurality of color bands by an optical thin film, the prism optical system includes the optical low-pass filter disposed on an incident side of the prism, and at least two quarter-wave plates having a phase elimination function, and each disposed on one of an incident surface and an outgoing surface of the luminous flux of the optical low-pass filter. The prism optical system is configured to satisfy the following equation,|X1/X2|>0.7where Xis a phase elimination efficiency at 550 nm wavelength when the incident side quarter-wave plate is inserted between crossed nicols, and Xis a phase elimination efficiency at 550 nm wavelength when the outgoing side quarter-wave plate is inserted between the crossed nicols.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile