# 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: 0.4 1.55
    coefficients: 3.09503 -0.012322111 2 0.043740379 -2 0.0024511569 -4 -9.9218754e-05 -6 2.3715962e-05 -8
  - type: tabulated k
    data: |
        0.370 4.9683E-06
        0.380 1.8133E-06
        0.390 8.6400E-07
        0.400 5.0983E-07
        0.420 2.4255E-07
        0.440 1.3929E-07
        0.460 9.2677E-08
        0.480 6.9381E-08
        0.500 3.9989E-08
        0.550 8.7623E-09
        0.600 9.5589E-09
        0.650 3.1129E-08
        0.700 2.7922E-08
        0.800 1.2745E-08
        1.060 5.0764E-08
        1.500 1.4411E-07
        2.000 5.1762E-07
SPECS:
    n_absolute: false
    wavelength_vacuum: false
    temperature: 20.0 °C
    thermal_dispersion:
      - type: "Schott formula"
        coefficients: -6.63e-06 1.28e-08 -1.8e-10 1.03e-06 1.51e-09 0.29
    nd: 1.79925
    Vd: 24.6
    glass_code: 799246
    density: 3.35 g/cm<sup>3</sup>
    thermal_expansion:
      - temperature_range: -30 70 °C
        coefficient: 8.7e-06 K<sup>-1</sup>
      - temperature_range: 20 300 °C
        coefficient: 1.07e-05 K<sup>-1</sup>
    dPgF: 0.0152
    climatic_resistance: 1.0
    acid_resistance: 1.0
