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. 28, 2014
Filed:
Jul. 26, 2012
Tetsuji Ueda, Koriyama, JP;
Michinari Ohuchi, Koriyama, JP;
Hiroyuki Nishimura, Koriyama, JP;
Akira Fujinoki, Koriyama, JP;
Masahiro Nakatsuka, Ikoma, JP;
Hidetsugu Yoshida, Takatsuki, JP;
Tetsuji Ueda, Koriyama, JP;
Michinari Ohuchi, Koriyama, JP;
Hiroyuki Nishimura, Koriyama, JP;
Akira Fujinoki, Koriyama, JP;
Masahiro Nakatsuka, Ikoma, JP;
Hidetsugu Yoshida, Takatsuki, JP;
Shin-Etsu Quartz Products Co., Ltd., Tokyo, JP;
Opto-Electronics Laboratory, Inc., Osaka, JP;
Abstract
It is an object of the present invention to provide a copper-containing silica glass which emits fluorescence having a peak in a wavelength range of from 520 nm to 580 nm under irradiation of ultraviolet light with a wavelength of 400 nm or less, and which is excellent in long term stability even in the high output use. The copper-containing silica glass is made to have copper of from 5 wtppm to 200 wtppm, which emits fluorescence having a peak in a wavelength range of from 520 nm to 580 nm under irradiation of ultraviolet light with a wavelength ranging from 160 nm to 400 nm, and in which an internal transmittance per 2.5 mm thickness at a wavelength of 530 nm is 95% or more.