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Title:
NEAR INFRARED ABSORBING GLASS
Document Type and Number:
Japanese Patent JPH04104918
Kind Code:
A
Abstract:

PURPOSE: To realize high transmittance and sharp absorption characteristics and enhance chemical durability by the coexistence of BaO and Li2O with contents within specific ranges in Cub-containing phosphate glass.

CONSTITUTION: Near infrared absorbing glass substantially containing 60-80wt.% P2O5, 3-11wt.% Al2O3, 3-9.5wt.% Bad, 3-20wt.% total amount of MgO, CaO, BaO and SrO, 1-5.5wt.% Li2O, 1-10wt.% total amount of Li2O, Na2O and K2O, 0-5wt.% total amount of SiO2 and B2O3, 0-5wt.% total amount of ZrO2, TiO2, Y2O3 and La2O3 and 0.2-10wt.% Cub. The aforementioned near infrared absorbing glass can be suitably used as color correction filter glass for normal cameras, VTR cameras, etc.


Inventors:
SAKAMOTO OSAMU
Application Number:
JP22005790A
Publication Date:
April 07, 1992
Filing Date:
August 23, 1990
Export Citation:
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Assignee:
ASAHI GLASS CO LTD
International Classes:
C03C3/17; C03C4/08; (IPC1-7): C03C3/17; C03C4/08
Attorney, Agent or Firm:
Shigeo Tsugamura (1 outside)



 
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