Title:
CRYSTALLIZED GLASS, CRYSTALLIZED GLASS OF THREE-DIMENSIONAL SHAPE, AND PRODUCTION METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2023/113041
Kind Code:
A1
Abstract:
A crystallized glass having a three-dimensional shape configured of a plurality of R shapes including a smallest R shape, which has an average radius of curvature of 5.0×102 mm or less, and a largest R shape, which has an average radius of curvature of 1.0×103 mm or greater. The crystallized glass has a sheet thickness t [mm] and a maximum retardation [nm] determined by the following determination method, the value obtained by dividing the maximum retardation by the sheet thickness t [mm] being 50 [nm/mm] or less. Determination method: One or more points on the circular arc of each R shape are vertically irradiated with light having a wavelength of 543 nm and examined for retardation with a birefringence measurement device.
Inventors:
FUKUSHI TAKANORI (JP)
MATSUOKA MIZUKI (JP)
KOMATSU HIROSHI (JP)
KANASUGI SATOSHI (JP)
MATSUOKA MIZUKI (JP)
KOMATSU HIROSHI (JP)
KANASUGI SATOSHI (JP)
Application Number:
PCT/JP2022/046552
Publication Date:
June 22, 2023
Filing Date:
December 16, 2022
Export Citation:
Assignee:
AGC INC (JP)
International Classes:
C03C10/00; C03B23/03
Domestic Patent References:
| WO2020203200A1 | 2020-10-08 | |||
| WO2021108345A1 | 2021-06-03 |
Foreign References:
| JP2017530933A | 2017-10-19 |
Attorney, Agent or Firm:
EIKOH, P.C. (JP)
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