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:
Nov. 02, 2010
Filed:
Oct. 08, 2004
Hideo Takezoe, Tokyo, JP;
Junji Watanabe, Tokyo, JP;
Myoung Hoon Song, Tokyo, JP;
Byoungchoo Park, Tokyo, JP;
Ki-chul Shin, Tokyo, JP;
Takehiro Toyooka, Yokohama, JP;
Suzushi Nishimura, Yokohama, JP;
Hideo Takezoe, Tokyo, JP;
Junji Watanabe, Tokyo, JP;
Myoung Hoon Song, Tokyo, JP;
Byoungchoo Park, Tokyo, JP;
Ki-Chul Shin, Tokyo, JP;
Takehiro Toyooka, Yokohama, JP;
Suzushi Nishimura, Yokohama, JP;
Nippon Oil Corporation, Tokyo, JP;
Abstract
A laser oscillation elementaccording to the invention comprises a cholesteric liquid crystal layercontaining cholesteric liquid crystals, a cholesteric liquid crystal layercontaining cholesteric liquid crystals facing the cholesteric liquid crystal layer, and a defect layercontaining a dyewhich emits fluorescence upon optical excitation disposed between the cholesteric liquid crystal layers. A selective reflection wavelength band in the cholesteric liquid crystals overlaps with the emission band of the fluorescence emitted by the dye, the helical winding directions of the cholesteric liquid crystals contained in the cholesteric liquid crystal layersare identical, and the transition moments of the dyeare aligned parallel to the surfaces of the cholesteric liquid crystal layers. According to the laser oscillation element, a laser oscillation can be generated with high efficiency. Moreover, continuous wave lasing can be generated.