OPTICAL GLASS AND OPTICAL ELEMENT
    19.
    发明申请

    公开(公告)号:US20180065880A1

    公开(公告)日:2018-03-08

    申请号:US15468474

    申请日:2017-03-24

    发明人: Wei YUAN

    IPC分类号: C03C3/062 C03C4/00 C03C4/20

    摘要: The present invention provides a high refractivity and high dispersion optical glass and optical element with small relative partial dispersion (Pg,F), high transmittance and good chemical stability. For optical glass, with anion as O2−, wherein a cation thereof contains the following components by weight percentage: 12-25% of Si4+; 58-75% of Nb5++W6++Zr4+; 8-25% of Li++Na++K+; 10% of Ba2+ or less. Based on the reasonable component design, the refractive index of the optical glass is 1.81-1.89, the Abbe number is 20-29, Pg,F is 0.5956-0.6199, and the corresponding wave length λ70 is below 450 nm when the transmittance reaches up to 70%. Therefore, the optical glass provided by the present invention is applicable to high-quality optical elements.