# 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: 3.2184433 -0.014906369 2 0.02692619 -2 0.00087409748 -4 -4.0331281e-05 -6 3.1677745e-06 -8
  - type: tabulated k
    data: |
        0.310 1.0713E-05
        0.320 5.5977E-06
        0.330 3.7368E-06
        0.340 2.4455E-06
        0.350 1.5365E-06
        0.360 9.6507E-07
        0.370 5.8791E-07
        0.380 3.7627E-07
        0.390 2.4867E-07
        0.400 1.7334E-07
        0.420 1.0870E-07
        0.440 8.1473E-08
        0.460 7.0220E-08
        0.480 6.9381E-08
        0.500 6.0135E-08
        0.550 5.2839E-08
        0.600 4.3166E-08
        0.650 2.5928E-08
        0.700 1.6736E-08
        0.800 1.2745E-08
        1.060 8.4777E-08
        1.500 1.1997E-07
        2.000 6.3313E-07
SPECS:
    n_absolute: false
    wavelength_vacuum: false
    temperature: 20.0 °C
    thermal_dispersion:
      - type: "Schott formula"
        coefficients: 1.34e-06 2.13e-08 -1.52e-10 5.8e-07 6.95e-10 0.204
    nd: 1.81600
    Vd: 46.7
    glass_code: 816467
    density: 4.96 g/cm<sup>3</sup>
    thermal_expansion:
      - temperature_range: -30 70 °C
        coefficient: 6.3e-06 K<sup>-1</sup>
      - temperature_range: 20 300 °C
        coefficient: 7.6e-06 K<sup>-1</sup>
    dPgF: -0.0086
    climatic_resistance: 1.0
    acid_resistance: 3.0
