Near infrared absorbing glass

Patent metadata

Field	Value
Publication number	US-10106455-B2
Application number	US-201615544049-A
Country	US
Kind code	B2
Filing date	Mar 29, 2016
Priority date	Apr 10, 2015
Publication date	Oct 23, 2018
Grant date	Oct 23, 2018

Abstract

Provided is a near infrared absorbing glass excellent in each of weather resistance, resistance to denitrification, and optical properties even if not containing fluorine. A near infrared absorbing glass containing, in % by mass, 25 to 60% P2O5, 2 to 19% Al2O3, 10 to 45% RO (where R is at least one selected from Mg, Ca, Sr, and Ba), 0 to 13% ZnO, 12% to 20% (exclusive of 12% and 20%) K2O, 0 to 12% Na2O, and 0.3 to 20% CuO.

First claim

The invention claimed is:

1. A near infrared absorbing glass containing, in % by mass, 25 to 60% P 2 O 5 , 2 to 19% Al 2 O 3 , 10 to 45% RO (where R is at least one selected from Mg, Ca, Sr, and Ba), 0 to 13% ZnO, 12% to 20% (exclusive of 12% and 20%) K 2 O, 0 to 12% Na 2 O, and 0.3 to 20% CuO, and being free of a fluorine component; wherein
P 2 O 5 /RO is 1.0 to 1.9.

2. The near infrared absorbing glass according to claim 1 , having a thickness of 0.01 to 1.2 mm.

Assignees

• Nippon Electric Glass Co

Inventors

• Nakamura Masashi

Classifications

• C03C3/17 Primary

  containing aluminium or beryllium · CPC title

• C03C4/08 Primary

  for glass selectively absorbing radiation of specified wave lengths · CPC title

• G02B5/22

  Absorbing filters {(G02B5/201 - G02B5/208 take precedence)} · CPC title

• G02B5/226

  Glass filters · CPC title

• C03C4/082

  for infrared absorbing glass · CPC title