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:
Sep. 04, 2012
Filed:
Dec. 16, 2008
Noriyuki Agata, Tokyo, JP;
Shinya Kikugawa, Tokyo, JP;
Yutaka Shimizu, Sawagun, JP;
Kazumi Yoshida, Tokyo, JP;
Masatoshi Nishimoto, Tokyo, JP;
Noriyuki Agata, Tokyo, JP;
Shinya Kikugawa, Tokyo, JP;
Yutaka Shimizu, Sawagun, JP;
Kazumi Yoshida, Tokyo, JP;
Masatoshi Nishimoto, Tokyo, JP;
Tokyo Denpa Co., Ltd., Tokyo, JP;
Asahi Glass Company, Limited, Tokyo, JP;
Abstract
An object of the present invention is to provide an artificial quartz member inhibited from suffering the decrease in transmittance in a laser light wavelength region which is caused by long-term irradiation with a laser light having a wavelength of 200 nm or shorter; and a process for producing the artificial quartz member. The invention provides an artificial quartz member for use as an optical element to be irradiated with a laser light having a wavelength of 200 nm or shorter, having an aluminum content of 200 ppb or lower.