# this file is part of refractiveindex.info database
# refractiveindex.info database is in the public domain
# copyright and related rights waived via CC0 1.0

REFERENCES: "<a href=\"http://refractiveindex.info/download/data/2017/sumita_2017-02-02.agf\">SUMITA Zemax catalog 2017-02-02</a> (obtained from <a href=\"http://www.sumita-opt.co.jp/en/download/\">http://www.sumita-opt.co.jp</a>)<br>See also <a href=\"http://refractiveindex.info/download/data/2016/sumita_2016-02-01.pdf\">SUMITA optical glass data book</a>"
DATA:
  - type: formula 3 
    wavelength_range: 0.36 1.55
    coefficients: 2.6761221 -0.012108757 2 0.016143507 -2 0.00051920927 -4 -2.8395319e-05 -6 1.8554978e-06 -8
  - type: tabulated k
    data: |
        0.330 5.3577E-06
        0.340 2.2460E-06
        0.350 9.8944E-07
        0.360 4.7910E-07
        0.370 2.3911E-07
        0.380 1.2344E-07
        0.390 6.9040E-08
        0.400 3.8428E-08
        0.420 1.0042E-08
        0.440 1.0520E-08
        0.460 1.0998E-08
        0.480 7.6471E-09
        0.500 7.9657E-09
        0.550 8.7623E-09
        0.600 9.5589E-09
        0.650 1.0355E-08
        0.700 1.1152E-08
        0.800 1.2745E-08
        1.060 8.4777E-08
        1.500 1.8041E-07
        2.000 6.4970E-07
SPECS:
    n_absolute: false
    wavelength_vacuum: false
    temperature: 20.0 °C
    thermal_dispersion:
      - type: "Schott formula"
        coefficients: -8.68e-07 1.28e-08 -1.92e-10 5.01e-07 9.91e-10 0.169
    nd: 1.65000
    Vd: 55.8
    glass_code: 650558
    density: 3.71 g/cm<sup>3</sup>
    thermal_expansion:
      - temperature_range: 20 300 °C
        coefficient: 8e-06 K<sup>-1</sup>
    dPgF: -0.0011
    climatic_resistance: 2.0
    acid_resistance: 5.0
