Opticglass, glass material for press molding, optical element blank, optical element and manufacture method thereof

Opticglass, glass material for press molding, optical element blank, optical element and manufacture method thereof

  • CN 101,591,143 B
  • Filed: 05/31/2009
  • Issued: 01/20/2016
  • Est. Priority Date: 05/30/2008
  • Status: Active Grant
First Claim
Patent Images

1. a fluorphosphate glass, it comprises:

  • Following positively charged ion;

    The P of the content of 20 to 45 positively charged ion % 5+;

    The Al of the content of 15 to 35 positively charged ion % 3+;

    The Ba of the content of 20 to 50 positively charged ion % 2+;

    With The B of the content of 0 to 3 positively charged ion % 3+;

    And Following negatively charged ion;

    The F of the content of 20 to 50 negatively charged ion % -;

    With The O of the content of 50 to 80 negatively charged ion % 2-;

    Wherein;

    O 2-/ P 5+mol ratio be more than or equal to 3.5;

    Al 3+/ P 5+mol ratio be more than or equal to 0.45;

    The Abbe number (ν

    d) of glass is more than or equal to 66;

    AndThe specific refractory power (nd) of glass meets expression formula (1);

    nd≥

    2.0614-0.0071×

    ν

    d(1)。

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