OPTICAL GLASS

PROBLEM TO BE SOLVED: To provide an optical glass which has high hardness and a high Young's modulus which have not been achieved in general optical glasses, and also has a high refractive index and low dispersion.SOLUTION: In the optical glass, the composition expressed by mol% satisfies the f...

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Bibliographische Detailangaben
Hauptverfasser:	WADA HIROTADA, KIKKO SHIGEO, KURACHI JUNJI
Format:	Patent
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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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide an optical glass which has high hardness and a high Young's modulus which have not been achieved in general optical glasses, and also has a high refractive index and low dispersion.SOLUTION: In the optical glass, the composition expressed by mol% satisfies the following conditions: 40%≤AlO≤54%; 20%≤LaO+YO≤30%; 0%≤LaO≤30%; 0%≤YO≤30%; 16%≤ZrO+NbO+TaO+MgO≤30%; 0%≤ZrO≤25%; 0%≤NbO≤10%; 0%≤TaO≤10%; 0%≤MgO≤15%; 0%≤ScO≤10%; 0%≤YbO≤5%; and 0≤SiO≤15%.