Title:
METHOD FOR MANUFACTURING OPTICAL MATERIAL FOR UV LASER LIGHT
Document Type and Number:
Japanese Patent JP3649283
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide an optical material for UV laser light which transmits a high power-UV laser light at high transmittance without damage, is thermally conductive and crack-resistant, causes no color center and a haze-free.
SOLUTION: A lithium tetraborate single crystal by Czochralski method is manufactured by drawing a single crystal rod from a lithium tetraborate melt at the drawing rate of 0.1-2 mm/hr wherein the first temperature gradient of the zone of the single crystal rod from the melt surface to 10 mm right over the melt and the second temperature gradient of the zone higher than 10 mm are respectively 50-150°C/cm and 5-50°C/cm which is smaller than the first temperature gradient.
Inventors:
Komatsu Taka 1
Sugawara Tamotsu
Masanori Takahashi
Sugawara Tamotsu
Masanori Takahashi
Application Number:
JP2001382569A
Publication Date:
May 18, 2005
Filing Date:
September 30, 1996
Export Citation:
Assignee:
Mitsubishi Materials Corporation
International Classes:
G02B1/02; C30B15/00; C30B15/20; C30B29/22; H01S3/034; H01S3/225; (IPC1-7): C30B29/22; C30B15/00; C30B15/20; G02B1/02; H01S3/034; H01S3/225
Domestic Patent References:
| JP200334595A | ||||
| JP7237997A |
Attorney, Agent or Firm:
Masayoshi Suda