# 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: 3.1704478 -0.012872124 2 0.030711328 -2 0.00091467552 -4 -4.2179151e-05 -6 5.885503e-06 -8
  - type: tabulated k
    data: |
        0.310 1.5331E-05
        0.320 1.0376E-05
        0.330 4.7317E-06
        0.340 2.3926E-06
        0.350 1.3495E-06
        0.360 8.0891E-07
        0.370 5.0286E-07
        0.380 3.2533E-07
        0.390 2.1856E-07
        0.400 1.5658E-07
        0.420 9.4918E-08
        0.440 7.4313E-08
        0.460 5.5324E-08
        0.480 3.4533E-08
        0.500 2.3945E-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 2.4054E-07
SPECS:
    n_absolute: false
    wavelength_vacuum: false
    temperature: 20.0 °C
    thermal_dispersion:
      - type: "Schott formula"
        coefficients: 6.7e-07 1.3e-08 -3.16e-10 7.17e-07 7.77e-10 0.224
    nd: 1.80610
    Vd: 40.7
    glass_code: 806407
    density: 4.17 g/cm<sup>3</sup>
    thermal_expansion:
      - temperature_range: -30 70 °C
        coefficient: 6.7e-06 K<sup>-1</sup>
      - temperature_range: 20 300 °C
        coefficient: 8e-06 K<sup>-1</sup>
    dPgF: -0.0087
    climatic_resistance: 1.0
    acid_resistance: 3.0
