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:
Aug. 04, 2020
Filed:
May. 29, 2015
Nippon Electric Glass Co., Ltd., Otsu-shi, Shiga, JP;
Tomoko Yamada, Otsu, JP;
Fumio Sato, Otsu, JP;
NIPPON ELECTRIC GLASS CO., LTD., Shiga, JP;
Abstract
Provided is a method that can manufacture a glass material having excellent homogeneity by containerless levitation. A block () of glass raw material is heated and melted by irradiation with a plurality of laser beams with the block () of glass raw material held levitated, thus obtaining a molten glass, and the molten glass is then cooled to obtain a glass material. The plurality of laser beams include a first laser beam (A) and a second laser beam (B). A size (θ) of an angle formed between the first laser beam (A) and the second laser beam (B) is 0° or more but less than 180°. A center (C) of a spot (S) of the first laser beam (A) on the surface of the block () of glass raw material and a center (C) of a spot (S) of the second laser beam (B) on the surface of the blockof glass raw material are different from each other.