# 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: 3.812992 -0.016672868 2 0.067171636 -2 0.0057116528 -4 -0.00042822929 -6 7.1278944e-05 -8
  - type: tabulated k
    data: |
        0.380 2.3413E-05
        0.390 1.3355E-05
        0.400 5.1926E-06
        0.420 1.0018E-06
        0.440 3.0747E-07
        0.460 1.4731E-07
        0.480 8.9440E-08
        0.500 5.3158E-08
        0.550 4.3833E-08
        0.600 6.3790E-08
        0.650 6.9105E-08
        0.700 7.4421E-08
        0.800 8.5053E-08
        1.060 5.6291E-08
        1.500 7.9657E-08
        2.000 1.0621E-07
SPECS:
    n_absolute: false
    wavelength_vacuum: false
    temperature: 20.0 °C
    thermal_dispersion:
      - type: "Schott formula"
        coefficients: 1.26e-05 4.23e-08 -4.24e-10 2.34e-06 8.67e-10 0.308
    nd: 2.01105
    Vd: 20.8
    density: 6.17 g/cm<sup>3</sup>
    thermal_expansion:
      - temperature_range: -30 70 °C
        coefficient: 8.2e-06 K<sup>-1</sup>
      - temperature_range: 20 300 °C
        coefficient: 9.1e-06 K<sup>-1</sup>
    dPgF: 0.0298
    climatic_resistance: 1.0
    acid_resistance: 5.0
