Compositions – Magnetic – Chromium or chromium compound containing
Patent
1974-09-12
1976-07-27
Garvin, Patrick P.
Compositions
Magnetic
Chromium or chromium compound containing
156 54, H01F 100, C03C 304, C03C 308, C03C 330
Patent
active
039717232
ABSTRACT:
Glass for use as an element of a Faraday rotator, consisting essentially of, by mol%, 10-30 Tb.sub.2 O.sub.3, 10-30 Al.sub.2 O.sub.3, and 30-80 SiO.sub.2 + B.sub.2 O.sub.3, with the proviso that SiO.sub.2 .gtoreq.15 and B.sub.2 O.sub.3 .gtoreq.10, and as optional components 0-5 ZrO.sub.2, 0-1 Sb.sub.2 O.sub.3, 0-1 As.sub.2 O.sub.3, and 0-2 AlF.sub.3. The glass has a large Verdet constant and a reduced absorption of light in the visible and infrared wavelength regions.
REFERENCES:
patent: 3318652 (1967-05-01), Buger et al.
patent: 3420601 (1969-01-01), Young et al.
patent: 3484152 (1969-12-01), Robinson
Asahara Yoshiyuki
Izumitani Tetsuro
Tajima Hidemi
Bell Mark
Garvin Patrick P.
Hoya Glass Works, Ltd.
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