# 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: 3.8354813 -0.015056123 2 0.060329996 -2 0.002453809 -4 1.7392287e-05 -6 1.7174222e-05 -8
  - type: tabulated k
    data: |
        0.360 2.5531E-05
        0.370 1.4213E-05
        0.380 8.0488E-06
        0.390 4.9955E-06
        0.400 3.3247E-06
        0.420 1.6933E-06
        0.440 9.7318E-07
        0.460 6.5159E-07
        0.480 4.5362E-07
        0.500 3.2219E-07
        0.550 1.3190E-07
        0.600 9.5781E-08
        0.650 8.6425E-08
        0.700 7.4421E-08
        0.800 4.2484E-08
        1.060 5.6291E-08
        1.500 7.9657E-08
        2.000 2.1263E-07
SPECS:
    n_absolute: false
    wavelength_vacuum: false
    temperature: 20.0 °C
    thermal_dispersion:
      - type: "Schott formula"
        coefficients: -1.71e-06 1.58e-08 -2.57e-10 1.04e-06 1.1e-09 0.282
    nd: 2.00680
    Vd: 26.2
    density: 4.8 g/cm<sup>3</sup>
    thermal_expansion:
      - temperature_range: -30 70 °C
        coefficient: 7e-06 K<sup>-1</sup>
      - temperature_range: 20 300 °C
        coefficient: 8.5e-06 K<sup>-1</sup>
    dPgF: 0.0099
    climatic_resistance: 1.0
    acid_resistance: 1.0
