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:
May. 24, 2011
Filed:
Sep. 18, 2008
Masashi Yoshimura, Suita, JP;
Takatomo Sasaki, Suita, JP;
Yusuke Mori, Suita, JP;
Muneyuki Nishioka, Suita, JP;
Tomotaka Katsura, Tokyo, JP;
Tetsuo Kojima, Tokyo, JP;
Junichi Nishimae, Tokyo, JP;
Masashi Yoshimura, Suita, JP;
Takatomo Sasaki, Suita, JP;
Yusuke Mori, Suita, JP;
Muneyuki Nishioka, Suita, JP;
Tomotaka Katsura, Tokyo, JP;
Tetsuo Kojima, Tokyo, JP;
Junichi Nishimae, Tokyo, JP;
Osaka University, Suita-shi, JP;
Mitsubishi Electric Corporation, Tokyo, JP;
Abstract
An optical wavelength conversion element includes a cesium-lithium-borate crystal processed into a 10-mm long optical element cut in an orientation that allows a fourth harmonic of a Nd:YAG laser to be generated. A transmittance (Ta) at 3589 cmin an infrared transmission spectrum of the optical element is used as an index that indicates a content of water impurities in the crystal and is independent of a polarization direction. An actual measurement of the transmittance Ta is at least 1%, without taking into account loss at an optically polished surface of the crystal. A wavelength conversion device, a ultraviolet laser irradiation apparatus, a laser processing system, and a method of manufacturing an optical wavelength conversion element are also described.