# 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: 3.2767321 -0.015115573 2 0.030753445 -2 0.00078350578 -4 -3.4594495e-06 -6 2.0542573e-06 -8
  - type: tabulated k
    data: |
        0.310 1.4331E-05
        0.320 8.0126E-06
        0.330 4.0859E-06
        0.340 2.2709E-06
        0.350 1.3359E-06
        0.360 7.9375E-07
        0.370 4.8893E-07
        0.380 3.0854E-07
        0.390 1.9864E-07
        0.400 1.4656E-07
        0.420 8.1192E-08
        0.440 6.0036E-08
        0.460 3.6790E-08
        0.480 3.4533E-08
        0.500 2.3945E-08
        0.550 8.7623E-09
        0.600 1.4345E-08
        0.650 2.0732E-08
        0.700 1.1152E-08
        0.800 3.1911E-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: 1.92e-06 1.65e-08 -2.32e-10 6.04e-07 6.91e-10 0.225
    nd: 1.83500
    Vd: 42.7
    glass_code: 835427
    density: 4.9 g/cm<sup>3</sup>
    thermal_expansion:
      - temperature_range: -30 70 °C
        coefficient: 6e-06 K<sup>-1</sup>
      - temperature_range: 20 300 °C
        coefficient: 7.4e-06 K<sup>-1</sup>
    dPgF: -0.0093
    climatic_resistance: 1.0
    acid_resistance: 2.0
