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:
Jan. 06, 2009
Filed:
Feb. 16, 2006
Hideto Momose, Hitachiota, JP;
Yuichi Sawai, Hitachi, JP;
Takashi Naito, Mito, JP;
Kensuke Matsui, Kokubunji, JP;
Hideto Momose, Hitachiota, JP;
Yuichi Sawai, Hitachi, JP;
Takashi Naito, Mito, JP;
Kensuke Matsui, Kokubunji, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
An optical switch for switching signal light by allowing the signal light to obliquely enter a non-linear optical thin filmcontaining nano-crystal of metal oxide from a light path disposed in an optical material, and irradiating visible excitation light to the non-linear optical thin film to induce a total reflection phenomenon, thereby controlling the reflection and transmission behavior of the signal light, wherein a difference between a temperature coefficient factor of an optical index of the non-linear optical thin film and that of an optical index of the optical material which is in contact with the non-linear optical thin film is determined to be 15×10/° C. or below. Preferably, it is determined to be zero or substantially zero. Thus, an influence due to the temperature increase is cancelled, and a malfunction of switching can be avoided.