# 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: 0.4 1.55
    coefficients: 4.2994108 -0.014091413 2 0.097855062 -2 0.0076857652 -4 -0.00046786841 -6 0.00012218724 -8
  - type: tabulated k
    data: |
        0.400 1.9511E-05
        0.420 8.5307E-06
        0.440 1.7875E-06
        0.460 6.1304E-07
        0.480 2.7023E-07
        0.500 1.3330E-07
        0.550 2.9208E-08
        0.600 3.1863E-08
        0.650 5.1803E-08
        0.700 5.5788E-08
        0.800 4.2484E-08
        1.060 5.6291E-08
        1.500 7.9657E-08
        2.000 3.7267E-07
SPECS:
    n_absolute: false
    wavelength_vacuum: false
    temperature: 20.0 °C
    thermal_dispersion:
      - type: "Schott formula"
        coefficients: 1.64e-05 4.6e-08 -2.91e-10 3.47e-06 -3e-09 0.301
    nd: 2.15400
    Vd: 17.2
    glass_code: 154172
    density: 7.1 g/cm<sup>3</sup>
    thermal_expansion:
      - temperature_range: -30 70 °C
        coefficient: 8.6e-06 K<sup>-1</sup>
      - temperature_range: 20 300 °C
        coefficient: 1.01e-05 K<sup>-1</sup>
    dPgF: 0.0498
    climatic_resistance: 1.0
    acid_resistance: 5.0
