# 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 
    range: 0.4 1.55
    coefficients: 2.780768 -0.011432782 2 0.02823867 -2 0.0009260712 -4 5.9615098e-06 -6 5.5996227e-06 -8
  - type: tabulated k
    data: |
        0.340 1.8690E-05
        0.350 9.5010E-06
        0.360 3.7510E-06
        0.370 1.7549E-06
        0.380 9.6412E-07
        0.390 6.0079E-07
        0.400 4.0329E-07
        0.420 2.0680E-07
        0.440 1.3929E-07
        0.460 1.0773E-07
        0.480 7.7169E-08
        0.500 5.6098E-08
        0.550 2.6340E-08
        0.600 2.8734E-08
        0.650 3.1129E-08
        0.700 3.3523E-08
        0.800 2.5516E-08
        1.060 1.6887E-08
        1.500 2.3897E-08
        2.000 5.0119E-07
SPECS:
    n_is_absolute: false
    λ_is_vacuum: false
    temperature: 20.0 °C
    coefficients_of_thermal_dispersion: -4.77e-06 1.49e-08 -1.38e-10 7.8e-07 7.44e-10 0.271
    n_d: 1.69320
    V_d: 33.7
    glass_code: 693337
    density: 3.13 g/cm<sup>3</sup>
    coefficient_of_thermal_expansion_1: 9.1e-06 K<sup>-1</sup>
    coefficient_of_thermal_expansion_2: 1.21e-05 K<sup>-1</sup>
    ΔP_gF: 0.0055
    climatic_resistance: 1.0
    acid_resistance: 1.0
