Optical glass having anomalous partial dispersion
Abstract
Abstract NOVEL GERMANIUM-CONTAINING OPTICAL GLASS COMPOSITIONS HAVING ANOMALOUS PARTIAL DISPERSION AND IMPROVED CHEMICAL PROPERTIES CONTAINING GLASS BATCH CONSTITUENTS RANGING IN WEIGHT PERCENT: 37-50% OF GLASS FORMERS SELECTED FROM THE GROUP OF METAL OXIDES CONSISTING OF SIO2, B2O3, AND GEO2; AT LEAST 6% OF AN ALKALI METAL OXIDE, AT LEAST 2% OF AN OXIDE SELECTED FROM THE GROUP CONSISTING OF ZNO AND CDO, UP TO 13% OF AN OXIDE SELECTED FROM THE GROUP CONSISTING OF AL2O3 AND LA2O3 3-8% OF ZRO2 AND 25-42% OF AN OXIDE SELECTED FROM THE GROUP CONSISTING OF TA2O5 AND/OR WO3 OR NB2O5 WITH AT LEAST 20% OF THE OXIDE OF TANTALUM BEING PRESENT. THE REFRACTIVE INDICES (NE) OF SUCH GLASSES RANGE APPROXIMATELY FROM 1.646 TO 1.733 WHILE THE ABBE VALUES (VE) RANGE BETWEEN 44.8 AND 37.1 AND THE PARTIAL DISPERSIONS ($VE) ARE FROM -3.0 TO -6.4.
Inventors
- 👤 Heinz Bromer
- 👤 Norbert Meinert
- 👤 Johann Spincic
- 👤 Hans Staaden
Bibliographic Details
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