# 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: 3.2298971 -0.011389181 2 0.047192351 -2 0.0024487094 -4 -6.4886719e-05 -6 2.1045135e-05 -8
  - type: tabulated k
    data: |
        0.360 1.2671E-05
        0.370 5.8313E-06
        0.380 3.1317E-06
        0.390 1.8498E-06
        0.400 1.1996E-06
        0.420 6.3891E-07
        0.440 4.3965E-07
        0.460 3.4523E-07
        0.480 2.6081E-07
        0.500 1.8737E-07
        0.550 7.9499E-08
        0.600 8.6727E-08
        0.650 1.2036E-07
        0.700 9.5511E-08
        0.800 3.1911E-08
        1.060 4.2282E-08
        1.500 9.5877E-08
        2.000 7.6618E-07
SPECS:
    n_absolute: false
    wavelength_vacuum: false
    temperature: 20.0 °C
    thermal_dispersion:
      - type: "Schott formula"
        coefficients: -4.02e-06 2.01e-08 -1.33e-10 1.73e-06 1.55e-09 0.277
    nd: 1.83932
    Vd: 24.8
    glass_code: 844248
    density: 4.58 g/cm<sup>3</sup>
    thermal_expansion:
      - temperature_range: -30 70 °C
        coefficient: 1.03e-05 K<sup>-1</sup>
      - temperature_range: 20 300 °C
        coefficient: 1.22e-05 K<sup>-1</sup>
    dPgF: 0.0136
    climatic_resistance: 1.0
    acid_resistance: 1.0
