Laser absorbing filter glass

Details Laser absorbing filter glass Laser absorbing filter glass

1993-09-14

1995-05-09

Bell, Mark L.

Compositions: ceramic

Ceramic compositions

Glass compositions, compositions containing glass other than...

501 79, 252582, 252587, C03C 3068

Patent

active

054139716

ABSTRACT:
Rare earth ions with partially filled 4f electron shells are incorporated in an amount of up to 39 mole percent oxide into a glass consisting essentially of, in mole percent, 19-31% SiO.sub.2, 19-31% B.sub.2 O.sub.3, 10-20% Al.sub.2 O.sub.3, 2-10% amounts of SiO.sub.2 and B.sub.2 O.sub.3 should be greater than about 40%, and the amounts of Al.sub.2 O.sub.3, ZrO.sub.2 and Y.sub.2 O.sub.3 are greater than about 12%. The glass can also include about 0.1 to 5% mole percent of FeO, ZnO or both. Suitable rare earth ions include but are not limited to, Er.sup.3+, Nd.sup.3+, Dy.sup.3+, and Sm.sup.3+. Optionally, the glass can be color corrected to neutral for a wide range of illuminant sources by the addition of one or more of the following: Cr.sub.2 O.sub.3, Pr.sub.2 O.sub.3, Fe.sub.2 O.sub.3, CuO, NiO, V.sub.2 O.sub.5, Co.sub.3 O.sub.4 or Ti.sub.2 O.sub.3. These glass compositions are useful as absorption filters. In one embodiment, the composition selectively absorbs at 1064 and 532 nm.

REFERENCES:
patent: 3971723 (1976-07-01), Tajima et al.
patent: 4106857 (1978-08-01), Snitzer
patent: 4288250 (1981-09-01), Yamashita
patent: 4521524 (1985-06-01), Yamashita
patent: 4769347 (1988-09-01), Cook et al.
patent: 5039631 (1991-08-01), Krashkevich et al.
Volf, Chemical Approach to Glass, p. 351, 1984.

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