# 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: 3.1717081 -0.013708448 2 0.029629026 -2 0.0011150095 -4 -5.5576606e-05 -6 5.6941122e-06 -8
  - type: tabulated k
    data: |
        0.330 9.1223E-06
        0.340 6.9725E-06
        0.350 3.1218E-06
        0.360 1.5408E-06
        0.370 8.3138E-07
        0.380 4.7725E-07
        0.390 2.9270E-07
        0.400 1.8681E-07
        0.420 9.4918E-08
        0.440 6.7167E-08
        0.460 5.5324E-08
        0.480 3.8389E-08
        0.500 1.9944E-08
        0.550 1.7542E-08
        0.600 1.9137E-08
        0.650 2.0732E-08
        0.700 1.1152E-08
        0.800 1.2745E-08
        1.060 1.6887E-08
        1.500 2.3897E-08
        2.000 4.3563E-07
SPECS:
    n_absolute: false
    wavelength_vacuum: false
    temperature: 20.0 °C
    thermal_dispersion:
      - type: "Schott formula"
        coefficients: 5.61e-06 1.72e-08 -1.79e-10 7.49e-07 7.58e-10 0.227
    nd: 1.80590
    Vd: 40.9
    glass_code: 810410
    density: 4.75 g/cm<sup>3</sup>
    thermal_expansion:
      - temperature_range: -30 70 °C
        coefficient: 6.4e-06 K<sup>-1</sup>
      - temperature_range: 20 300 °C
        coefficient: 8.3e-06 K<sup>-1</sup>
    dPgF: -0.0074
    climatic_resistance: 1.0
    acid_resistance: 3.0
