OPTICAL GLASS COMPOSITION, PREFORM, AND OPTICAL ELEMENT

PROBLEM TO BE SOLVED: To provide a high refractive index-lower to middle dispersion type optical glass composition that has nd within a high refractive index range of 1.83-1.86 and νd within a range of 43-46, and yet shows excellent melting property, processability (droplet property), crystallinity...

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1. Verfasser:	ONODA MINORU
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Sprache:	eng
Schlagworte:	CHEMICAL COMPOSITION OF GLASSES, GLAZES, OR VITREOUSENAMELS CHEMISTRY GLASS JOINING GLASS TO GLASS OR OTHER MATERIALS METALLURGY MINERAL OR SLAG WOOL OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS OPTICS PHYSICS SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS,MINERALS OR SLAGS SURFACE TREATMENT OF GLASS
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creator	ONODA MINORU
description	PROBLEM TO BE SOLVED: To provide a high refractive index-lower to middle dispersion type optical glass composition that has nd within a high refractive index range of 1.83-1.86 and νd within a range of 43-46, and yet shows excellent melting property, processability (droplet property), crystallinity and the like. SOLUTION: The optical glass composition contains, in % by mole, 0-10.0% SiO2, 35.0-45.0% B2O3, 0-5.0% Li2O, 0-12.0% ZnO, 0-10.0% ZrO2, 10.0-20.0% La2O3, 3.0-10.0% Ta2O5, 10.0-22.0% Ta2O5+ZnO and 5.0-20.0% Gd2O3, and has a refractive index (nd) to the d-line of 1.83-1.86, an Abbe number (νd) to the d-line of 43-46 and a liquidus temperature of ≤1,200°C. A preform and an optical element are also provided. COPYRIGHT: (C)2010,JPO&INPIT
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SOLUTION: The optical glass composition contains, in % by mole, 0-10.0% SiO2, 35.0-45.0% B2O3, 0-5.0% Li2O, 0-12.0% ZnO, 0-10.0% ZrO2, 10.0-20.0% La2O3, 3.0-10.0% Ta2O5, 10.0-22.0% Ta2O5+ZnO and 5.0-20.0% Gd2O3, and has a refractive index (nd) to the d-line of 1.83-1.86, an Abbe number (νd) to the d-line of 43-46 and a liquidus temperature of ≤1,200°C. A preform and an optical element are also provided. 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SOLUTION: The optical glass composition contains, in % by mole, 0-10.0% SiO2, 35.0-45.0% B2O3, 0-5.0% Li2O, 0-12.0% ZnO, 0-10.0% ZrO2, 10.0-20.0% La2O3, 3.0-10.0% Ta2O5, 10.0-22.0% Ta2O5+ZnO and 5.0-20.0% Gd2O3, and has a refractive index (nd) to the d-line of 1.83-1.86, an Abbe number (νd) to the d-line of 43-46 and a liquidus temperature of ≤1,200°C. A preform and an optical element are also provided. 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SOLUTION: The optical glass composition contains, in % by mole, 0-10.0% SiO2, 35.0-45.0% B2O3, 0-5.0% Li2O, 0-12.0% ZnO, 0-10.0% ZrO2, 10.0-20.0% La2O3, 3.0-10.0% Ta2O5, 10.0-22.0% Ta2O5+ZnO and 5.0-20.0% Gd2O3, and has a refractive index (nd) to the d-line of 1.83-1.86, an Abbe number (νd) to the d-line of 43-46 and a liquidus temperature of ≤1,200°C. A preform and an optical element are also provided. COPYRIGHT: (C)2010,JPO&INPIT</abstract><oa>free_for_read</oa></addata></record>
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subjects	CHEMICAL COMPOSITION OF GLASSES, GLAZES, OR VITREOUSENAMELS CHEMISTRY GLASS JOINING GLASS TO GLASS OR OTHER MATERIALS METALLURGY MINERAL OR SLAG WOOL OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS OPTICS PHYSICS SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS,MINERALS OR SLAGS SURFACE TREATMENT OF GLASS
title	OPTICAL GLASS COMPOSITION, PREFORM, AND OPTICAL ELEMENT
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