# 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: 3.3130252 -0.01525551 2 0.031799975 -2 0.0010027504 -4 -2.7509191e-05 -6 3.4290858e-06 -8
  - type: tabulated k
    data: |
        0.310 1.2621E-05
        0.320 6.3688E-06
        0.330 3.8709E-06
        0.340 2.4995E-06
        0.350 1.5559E-06
        0.360 9.7713E-07
        0.370 6.0232E-07
        0.380 3.7285E-07
        0.390 2.5204E-07
        0.400 1.8007E-07
        0.420 1.1908E-07
        0.440 8.5059E-08
        0.460 7.0220E-08
        0.480 4.9982E-08
        0.500 3.5972E-08
        0.550 2.1939E-08
        0.600 2.3933E-08
        0.650 3.1129E-08
        0.700 3.3523E-08
        0.800 1.2745E-08
        1.060 1.6887E-08
        1.500 2.3897E-08
        2.000 4.3563E-07
SPECS:
    n_absolute: false
    wavelength_vacuum: false
    temperature: 20.0 °C
    thermal_dispersion:
      - type: "Schott formula"
        coefficients: 4.51e-06 1.51e-08 -2.57e-10 7.41e-07 8.37e-10 0.205
    nd: 1.84604
    Vd: 41.5
    glass_code: 851416
    density: 5.15 g/cm<sup>3</sup>
    thermal_expansion:
      - temperature_range: -30 70 °C
        coefficient: 6e-06 K<sup>-1</sup>
      - temperature_range: 20 300 °C
        coefficient: 7.3e-06 K<sup>-1</sup>
    dPgF: -0.0094
    climatic_resistance: 1.0
    acid_resistance: 2.0
