# 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: 3.1494851 -0.013835107 2 0.029184533 -2 0.00080707995 -4 -6.1706552e-06 -6 2.3930989e-06 -8
  - type: tabulated k
    data: |
        0.340 1.6250E-05
        0.350 6.6607E-06
        0.360 3.0184E-06
        0.370 1.4803E-06
        0.380 8.1858E-07
        0.390 5.0888E-07
        0.400 2.9042E-07
        0.420 1.5707E-07
        0.440 7.0239E-08
        0.460 3.6661E-08
        0.480 2.5490E-08
        0.500 2.6552E-08
        0.550 2.9208E-08
        0.600 3.1863E-08
        0.650 3.4518E-08
        0.700 3.7173E-08
        0.800 4.2484E-08
        1.060 5.6291E-08
        1.500 7.9657E-08
        2.000 1.3976E-06
SPECS:
    n_absolute: false
    wavelength_vacuum: false
    temperature: 20.0 °C
    thermal_dispersion:
      - type: "Schott formula"
        coefficients: 5.81e-06 1.54e-08 -1.28e-10 7.89e-07 6.03e-10 0.215
    nd: 1.79890
    Vd: 41.8
    glass_code: 799418
    density: 4.65 g/cm<sup>3</sup>
    thermal_expansion:
      - temperature_range: -30 70 °C
        coefficient: 6.1e-06 K<sup>-1</sup>
      - temperature_range: 20 300 °C
        coefficient: 8e-06 K<sup>-1</sup>
    dPgF: -0.0068
    climatic_resistance: 1.0
    acid_resistance: 3.0
