# 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: 3.8348467 -0.016749417 2 0.068052702 -2 0.0056319146 -4 -0.00041721893 -6 7.0964768e-05 -8
  - type: tabulated k
    data: |
        0.380 2.3413E-05
        0.390 1.3355E-05
        0.400 5.1926E-06
        0.420 1.0018E-06
        0.440 3.0747E-07
        0.460 1.4731E-07
        0.480 8.9440E-08
        0.500 5.3158E-08
        0.550 4.3833E-08
        0.600 6.3790E-08
        0.650 6.9105E-08
        0.700 7.4421E-08
        0.800 8.5053E-08
        1.060 5.6291E-08
        1.500 7.9657E-08
        2.000 1.0621E-07
SPECS:
    n_is_absolute: false
    λ_is_vacuum: false
    temperature: 20.0 °C
    coefficients_of_thermal_dispersion: 1.26e-05 4.23e-08 -4.24e-10 2.34e-06 8.67e-10 0.308
    n_d: 2.01700
    V_d: 20.8
    density: 6.17 g/cm<sup>3</sup>
    coefficient_of_thermal_expansion_1: 8.2e-06 K<sup>-1</sup>
    coefficient_of_thermal_expansion_2: 9.1e-06 K<sup>-1</sup>
    ΔP_gF: 0.0288
    climatic_resistance: 1.0
    acid_resistance: 5.0
