Title:
NEAR-INFRARED CUTOFF FILTER GLASS
Document Type and Number:
WIPO Patent Application WO/2017/018273
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide near-infrared cutoff filter glass, having the excellent optical characteristics of high transmittance of light in the visible region and low transmittance of infrared light, and excellent devitrification resistance, even if the copper component concentration in the glass is increased with thinner glass sheets. Provided is near-infrared cutoff filter glass characterized by containing, expressed as cation percents, 30 to 50% of P5+, 5 to 20% of Al3+, 20 to 40% of R+ (R+ represents the total amount of Li+, Na+ and K+), 5 to 30% of R'2+ (R'2+ represents the total amount of Mg2+, Ca2+, Sr2+, Ba2+ and Zn2+), 3 to 15% of Cu2+, and containing, expressed as anion percents, 30 to 90% of O2-, 10 to 70% of F-, wherein (Li++ Na++ K+)/(P5++Al3+) is 0.45 to 1.0; and (Sr2++Ba2++Cu2+)/(Al3++Mg2++Ca2+) is 0.5 to 1.0.
Inventors:
SHIRATORI MAKOTO (JP)
Application Number:
PCT/JP2016/071158
Publication Date:
February 02, 2017
Filing Date:
July 19, 2016
Export Citation:
Assignee:
ASAHI GLASS CO LTD (JP)
International Classes:
G02B5/22; C03C3/247; C03C4/08
Domestic Patent References:
| WO2010119964A1 | 2010-10-21 |
Foreign References:
| JP2011162409A | 2011-08-25 | |||
| JP2004083290A | 2004-03-18 | |||
| JP2011132077A | 2011-07-07 | |||
| JP2015078086A | 2015-04-23 | |||
| JP2016060671A | 2016-04-25 |
Attorney, Agent or Firm:
SENMYO, Kenji et al. (JP)
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