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:
May. 16, 2003
Shigeo Kittaka, Osaka, JP;
Kazuaki Oya, Osaka, JP;
Masatoshi Nara, Osaka, JP;
Keiji Tsunetomo, Osaka, JP;
Takahiro Asai, Osaka, JP;
Shigeo Kittaka, Osaka, JP;
Kazuaki Oya, Osaka, JP;
Masatoshi Nara, Osaka, JP;
Keiji Tsunetomo, Osaka, JP;
Takahiro Asai, Osaka, JP;
Nippon Sheet Glass Co., Ltd., Osaka, JP;
Abstract
An optical element, composed of an one-dimensional photonic crystal of a triangular prism shape and a multilayer film and a phase modulation unit are used together, with the phase modulation unit adjacent or abutting to a light input end surface of the optical element. Input light is phase-modulated by the phase modulation unit in the same period and direction as those of photonic crystal so that only specific high-order band light can be propagated through the optical element. When this optical element is formed in an optical waveguide, a small-size spectroscopic device having high resolving power can be provided.