Title:
FLUOROPHOSPHATE OPTICAL GLASS, AND OPTICAL PREFORM, ELEMENT AND INSTRUMENT
Document Type and Number:
WIPO Patent Application WO/2020/062008
Kind Code:
A1
Abstract:
Provided are fluorphosphate glass, and an optical preform, element and instrument, relating to the technical field of optical glass. The optical glass contains the following components in molar percentage of cations: P5+: 2-20%, Al3+: 20-40%, Ba2+: 0.5-10%, Sr2+: 5-25%, Ca2+: 15-35%, and Mg2+: 1-15%, and contains the following components in molar percentage of anions: F-: 83-95% and O2-: 5-17%. The fluorophosphate optical glass has a refractive index (nd) of 1.42-1.45, an abbe number (vd) of 93-96, a density (ρ) of 3.55 g/cm3 or less, a bubble degree of grade B or above, a thermal expansion coefficient of 160×10-7/K or less, water resistance stability (Dw) of type 2 or above, and excellent anti-crystallization properties.
Inventors:
SUN WEI (CN)
Application Number:
PCT/CN2018/108273
Publication Date:
April 02, 2020
Filing Date:
September 28, 2018
Export Citation:
Assignee:
CDGM GLASS CO LTD (CN)
International Classes:
C03C3/247; C03B11/08
Foreign References:
| CN101665324A | 2010-03-10 | |||
| CN101665326A | 2010-03-10 | |||
| CN102300823A | 2011-12-28 | |||
| CN101555099A | 2009-10-14 | |||
| CN101544468A | 2009-09-30 |
Other References:
See also references of EP 3858796A4
Attorney, Agent or Firm:
CHENGDU JIUDINGTIANYUAN INTELLECTUAL PROPERTY AGENCY LTD. (CN)
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