Infrared absorbing green glass

Details Infrared absorbing green glass Infrared absorbing green glass

1990-10-02

1991-07-30

Bell, Mark L.

Compositions: ceramic

Ceramic compositions

Glass compositions, compositions containing glass other than...

501 73, 501904, C03C 408, C03C 410

Patent

active

050360256

ABSTRACT:
A green optical filter phosphate-based glass having a high near infrared, absorption at about 650 nm to 950 nm and a transmission peak transmission at 550 nm to 560 nm and with the steepest slope of the absorption curve occurring between about 570 nm to 650 nm. The glass composition comprising, in mol %: 50 to 60% P.sub.2 O.sub.5, O to 5% SiO.sub.2, 20 to 33% Li.sub.2 O, 0 to 25% Na.sub.2 O, 1 to 25% K.sub.2 O, 0 to 5% for each of CaO, Bao, SrO and MgO, 7 to 10% Al.sub.2 O.sub.3, 3 to 6% CuO, 0.5 to 1.6% Cr.sub.2 O.sub.3, 0.5 to 2.0% Ho.sub.2 O.sub.3, 0.5 to 2.0 Dy.sub.2 O.sub.3 and 0 to 2.0% Er.sub.2 O.sub.3.

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patent: 3979322 (1976-09-01), Alexeev et al.
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patent: 4105577 (1978-08-01), Yamashita
patent: 4106857 (1978-08-01), Snitzer
patent: 4110245 (1978-08-01), Yamashita
patent: 4303298 (1981-12-01), Yamashita
patent: 4615989 (1986-10-01), Ritze
patent: 4920081 (1990-04-01), Beall et al.
patent: 4962067 (1990-10-01), Myers

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