The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 27, 1976
Filed:
Sep. 12, 1974
Applicant:
Inventors:
Assignee:
Hoya Glass Works, Ltd., Tokyo, JA;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01F / ; C03C / ; C03C / ; C03C / ;
U.S. Cl.
CPC ...
252 6251 ; 156 54 ;
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.