# 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: 2.8797142 -0.015009518 2 0.01933782 -2 0.00048379963 -4 -1.1367908e-05 -6 7.0484275e-07 -8
  - type: tabulated k
    data: |
        0.310 8.1330E-06
        0.320 5.2750E-06
        0.330 3.4384E-06
        0.340 2.2090E-06
        0.350 1.3950E-06
        0.360 8.5101E-07
        0.370 5.3094E-07
        0.380 3.3883E-07
        0.390 2.2856E-07
        0.400 1.6998E-07
        0.420 1.1216E-07
        0.440 9.2241E-08
        0.460 8.5176E-08
        0.480 6.9381E-08
        0.500 6.0135E-08
        0.550 5.2839E-08
        0.600 4.7987E-08
        0.650 4.6764E-08
        0.700 2.7922E-08
        0.800 1.2745E-08
        1.060 1.6887E-08
        1.500 2.3897E-08
        2.000 4.6837E-07
SPECS:
    n_absolute: false
    wavelength_vacuum: false
    temperature: 20.0 °C
    thermal_dispersion:
      - type: "Schott formula"
        coefficients: 9.91e-07 1.3e-08 -2.26e-10 5.21e-07 4.99e-10 0.162
    nd: 1.71300
    Vd: 53.9
    glass_code: 713539
    density: 3.79 g/cm<sup>3</sup>
    thermal_expansion:
      - temperature_range: -30 70 °C
        coefficient: 4.9e-06 K<sup>-1</sup>
      - temperature_range: 20 300 °C
        coefficient: 7.5e-06 K<sup>-1</sup>
    dPgF: -0.0065
    climatic_resistance: 1.0
    acid_resistance: 4.0
