# 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: 3.1735917 -0.01381902 2 0.029219972 -2 0.0011233335 -4 -4.4143284e-05 -6 4.6335289e-06 -8
  - type: tabulated k
    data: |
        0.340 6.6067E-06
        0.350 2.6369E-06
        0.360 1.1947E-06
        0.370 6.1681E-07
        0.380 3.5579E-07
        0.390 2.2189E-07
        0.400 1.4990E-07
        0.420 8.4619E-08
        0.440 6.0036E-08
        0.460 3.6790E-08
        0.480 3.0681E-08
        0.500 1.1955E-08
        0.550 8.7623E-09
        0.600 9.5589E-09
        0.650 1.0355E-08
        0.700 1.1152E-08
        0.800 1.2745E-08
        1.060 1.6887E-08
        1.500 2.3897E-08
        2.000 3.7033E-07
SPECS:
    n_absolute: false
    wavelength_vacuum: false
    temperature: 20.0 °C
    thermal_dispersion:
      - type: "Schott formula"
        coefficients: 6.99e-06 2.24e-08 -2.94e-10 8.37e-07 3.41e-10 0.213
    nd: 1.80614
    Vd: 41.1
    glass_code: 811411
    density: 4.71 g/cm<sup>3</sup>
    thermal_expansion:
      - temperature_range: -30 70 °C
        coefficient: 5.7e-06 K<sup>-1</sup>
      - temperature_range: 20 300 °C
        coefficient: 7.9e-06 K<sup>-1</sup>
    dPgF: -0.0061
    climatic_resistance: 1.0
    acid_resistance: 3.0
