# 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: 2.7128944 -0.010619935 2 0.019653632 -2 0.00040051165 -4 1.1626539e-06 -6 1.1579589e-06 -8
  - type: tabulated k
    data: |
        0.330 1.8140E-05
        0.340 7.1950E-06
        0.350 3.0211E-06
        0.360 1.3927E-06
        0.370 7.0152E-07
        0.380 3.8656E-07
        0.390 2.2522E-07
        0.400 1.4323E-07
        0.420 8.8048E-08
        0.440 6.7167E-08
        0.460 5.1610E-08
        0.480 3.8389E-08
        0.500 2.7950E-08
        0.550 2.1939E-08
        0.600 1.9137E-08
        0.650 1.0355E-08
        0.700 1.1152E-08
        0.800 1.2745E-08
        1.060 1.6887E-08
        1.500 3.5864E-08
        2.000 4.0295E-07
SPECS:
    n_absolute: false
    wavelength_vacuum: false
    temperature: 20.0 °C
    thermal_dispersion:
      - type: "Schott formula"
        coefficients: 7.44e-08 1.27e-08 -3.11e-10 5.72e-07 5.44e-10 0.214
    nd: 1.66422
    Vd: 49.2
    glass_code: 664492
    density: 3.62 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: -0.0024
    climatic_resistance: 1.0
    acid_resistance: 4.0
