Title:
GLASS FIBER MATERIAL FOR INFRARED TRANSMISSION
Document Type and Number:
Japanese Patent JPS5849644
Kind Code:
A
Abstract:
PURPOSE: To provide the titled glass fiber material having excellent infrared transmittance and high stability against the crystallization during drawing, by doping one or more fluorides such as LiF, CsF, etc. to a matrix glass composed mainly of BaF2 and ZrF4.
CONSTITUTION: The glass fiber material is composed of a fluoride glass obtained by doping (A) a matrix glass composed 28W38% BaF2, 58W69% ZrF4, 0W7% GdF3 and 0W8% AlF3 with (B) a compound selected from ≤20% LiF (based on the whole composition), ≤10% CsF, ≤10% CaF2, ≤20% CdF2, ≤12% BeF2, ≤28% SbF3, ≤10% YF3, ≤8% LaF3, ≤8% LuF3 and ≤8% SnF2. The glass transmits infrared rays having wavelength of 2W6μm (all in mol%).
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Inventors:
MITACHI NARIYUKI
MIYASHITA TADASHI
KANAMORI TERUHISA
SUZUKI YOSHIKO
MIYASHITA TADASHI
KANAMORI TERUHISA
SUZUKI YOSHIKO
Application Number:
JP14784881A
Publication Date:
March 23, 1983
Filing Date:
September 21, 1981
Export Citation:
Assignee:
NIPPON TELEGRAPH & TELEPHONE
International Classes:
C03C3/32; C03C13/04; G02B6/00; G02B6/02; (IPC1-7): C03C3/18; C03C3/30; C03C13/00; G02B5/14
Attorney, Agent or Firm:
Hiroshi Nakamoto