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AssigneeNippon Electric Glass Co., Ltd.
InventorsTomoko YAMADA, Fumio SATO
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Provided is a method that can manufacture a glass material having excellent homogeneity by containerless levitation. A block (12) of glass raw material is heated and melted by irradiation with a plurality of laser beams with the block (12) 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 (13A) and a second laser beam (13B). A size (θ) of an angle formed between the first laser beam (13A) and the second laser beam (13B) is 0° or more but less than 180°. A center (C1) of a spot (S1) of the first laser beam (13A) on the surface of the block (12) of glass raw material and a center (C2) of a spot (S2) of the second laser beam (13B) on the surface of the block 12 of glass raw material are different from each other.
A method for manufacturing a glass material, the method comprising the step of heating and melting a block of glass raw material by irradiation with a plurality of laser beams with the block of glass raw material held levitated, thus obtaining a molten glass, and then cooling the molten glass to obtain a glass material, wherein
A device for manufacturing a glass material by heating and melting a block of glass raw material by irradiation with a plurality of laser beams including a first laser beam and a second laser beam with the block of glass raw material held levitated, thus obtaining a molten glass, and then cooling the molten glass to obtain a glass material,
Dependencies are inferred from the claim text.