Lead and arsenic free optical lanthanum borate glass

Lead and arsenic free optical lanthanum borate glass

  • CN 1,876,589 A
  • Filed: 04/19/2006
  • Published: 12/13/2006
  • Est. Priority Date: 04/29/2005
  • Status: Active Grant
First Claim
Patent Images

1. Pb-free and arsenic-free optical glass, it has 1.75≤

  • n d

    1.83 refractive index n dWith 34≤

    ν

    d

    44 Abbe (Abbe) number ν

    d, it is characterized in that described glass comprises following composition (pressing oxide compound by weight percentage);

    SiO 2 B 2O 3 ZnO La 2O 3 Ta 2O 5 Nb 2O 5 WO 3 Al 2O 3 Li 2O Na 2O K 2O Cs 2O MgO CaO SrO BaO Y 2O 3 TiO 2 ZrO 2 HfO 2 0.5-8 10-25 10-26 18-34 >

    15-25 0.5-15 0-10 0-2 0-5 0-6 0-8 0-9 0-5 0-5 0-5 0-5 0-10 0-6 0-11 0-6 ∑

    B 2O 3

    ZnO 30-45 The ∑

    alkalimetal oxide 0-10 The ∑

    alkaline earth metal oxide 0-8

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