# 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: 2.6455399 -0.010990833 2 0.018955207 -2 0.00040800743 -4 9.934634e-06 -6 9.3197902e-07 -8
  - type: tabulated k
    data: |
        0.350 6.0482E-06
        0.360 2.7494E-06
        0.370 1.3604E-06
        0.380 7.1281E-07
        0.390 4.0026E-07
        0.400 2.3785E-07
        0.420 1.1908E-07
        0.440 7.7891E-08
        0.460 6.2765E-08
        0.480 4.6114E-08
        0.500 3.5972E-08
        0.550 1.7542E-08
        0.600 1.9137E-08
        0.650 2.5928E-08
        0.700 1.6736E-08
        0.800 1.2745E-08
        1.060 1.6887E-08
        1.500 2.3897E-08
        2.000 3.2154E-07
SPECS:
    n_absolute: false
    wavelength_vacuum: false
    temperature: 20.0 °C
    thermal_dispersion:
      - type: "Schott formula"
        coefficients: -4.02e-07 1.44e-08 -1.41e-10 4.98e-07 5.81e-10 0.243
    nd: 1.64328
    Vd: 47.8
    glass_code: 643478
    density: 3.44 g/cm<sup>3</sup>
    thermal_expansion:
      - temperature_range: -30 70 °C
        coefficient: 6.6e-06 K<sup>-1</sup>
      - temperature_range: 20 300 °C
        coefficient: 8.2e-06 K<sup>-1</sup>
    dPgF: 0.0012
    climatic_resistance: 1.0
    acid_resistance: 2.0
