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:
Oct. 02, 2018
Filed:
Mar. 04, 2015
Denso Corporation, Kariya, Aichi-pref., JP;
Inter-university Research Institute Corporation National Institutes of Natural Sciences, Mitaka-shi, Tokyo, JP;
DENSO CORPORATION, Kariya, JP;
INTER-UNIVERSITY RESEARCH INSTITUTE CORPORATION NATIONAL INSTITUTES OF NATURAL SCIENCES, Tokyo, JP;
Abstract
A laser ignition device capable of achieving stable ignition, preventing deterioration of a semiconductor laser element is provided, by suppressing the intensity of oscillated light leakage leaking towards semiconductor laser side from the laser resonator with a simple configuration. A laser ignition deviceincludes an excitation light sourceemitting coherent excitation light L, an optical elementtransmitting excitation light L, a laser resonatoroscillating oscillated light having high energy density by being irradiated with excitation light L, and condensing meanscondensing the oscillated light Loscillated by the laser resonator. Moreover, the laser ignition deviceis provided with a light-transmissive-reflective filmdisposed between the excitation light sourceand the laser resonator. The light-transmissive-reflective filmpermeating the excitation light Lhaving short wavelength and reflecting oscillated light leakage Lhaving long wavelength.