Optical glass, precision press-molding preform, process for production thereof, optical element and process for the production thereof

Optical glass, precision press-molding preform, process for production thereof, optical element and process for the production thereof

  • CN 101,570,395 A
  • Filed: 03/02/2005
  • Published: 11/04/2009
  • Est. Priority Date: 03/02/2004
  • Status: Active Application
First Claim
Patent Images

1. opticglass in mol%, comprises:

  • 15-45%

    B 2O 3

    5-20%

    La 2O 3

    1-20%

    Gd 2O 3

    10-45%

    ZnO,

    0-15%

    WO 3

    0-10%

    Ta 2O 5

    0-10%

    Nb 2O 5

    0-20%

    TiO 2

    0-20%

    SiO 2

    0-15%

    Li 2O,

    0-10%

    Na 2O,

    0-10%

    K 2O,

    0-10%

    MgO,

    0-10%

    CaO,

    0-10%

    SrO,

    0-10%

    BaO0-8%

    Y 2O 3

    0-8%

    Yb 2O 3

    Condition is La 2O 3, Gd 2O 3, Y 2O 3And Yb 2O 3Total content be 10-30%, and WO 3, Ta 2O 5, Nb 2O 5And TiO 2Total content surpass 10wt%, 0-is less than 0.5%ZrO 2, 0-10%Bi 2O 3And 0-1%

    Sb 2O 3

    And have and surpass 1.86 refractive index n d, 35 to less than 39.5 Abbe number vd and 630 ℃

    or lower glass transition temp Tg.

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