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:
Apr. 29, 2025
Filed:
Jan. 17, 2020
Shin-etsu Quartz Products Co., Ltd., Tokyo, JP;
Heraeus Quarzglas Gmbh & Co. KG, Hanau, DE;
Atsushi Shimada, Koriyama, JP;
Katsuhide Orikasa, Koriyama, JP;
Makoto Tanaka, Koriyama, JP;
Tomoichi Kumata, Koriyama, JP;
Hiromi Tarukawa, Koriyama, JP;
Shin-Etsu Quartz Products Co., Ltd., Tokyo, JP;
Heraeus Quarzglas GmbH & Co. KG, Hanau, DE;
Abstract
Provided is a titanium-containing quartz glass having excellent UV absorption. The quartz glass absorbs ultraviolet rays having a wavelength of 250 nm or less, ozone generation-related adverse effects on the human body, are prevented, a decrease in transmittance of the quartz glass in the range from near-ultraviolet to visible light due to being colored when irradiated with ultraviolet rays does not occur, absorption build-up or lamp burst-inducing deformation build-up, which is caused by a structural change in the quartz glass that occurs in the range of 200-300 nm when irradiated with ultraviolet rays, is suppressed, and a decrease in transmittance at intended wavelength ranges does not occur even when exposed to ultraviolet rays. The titanium-containing quartz glass having excellent UV absorption is colorless, wherein the average concentration of titanium is 10-500 ppm, the concentration of OH group is 10-350 ppm.