# 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: 3.052913 -0.012276955 2 0.041487837 -2 0.0019043764 -4 -3.1653157e-05 -6 1.7320425e-05 -8
  - type: tabulated k
    data: |
        0.370 6.5804E-06
        0.380 2.2831E-06
        0.390 1.0455E-06
        0.400 6.2393E-07
        0.420 3.4843E-07
        0.440 2.4658E-07
        0.460 1.9934E-07
        0.480 1.6788E-07
        0.500 1.3352E-07
        0.550 7.9499E-08
        0.600 7.2162E-08
        0.650 7.8176E-08
        0.700 6.7249E-08
        0.800 1.9127E-08
        1.060 2.5344E-08
        1.500 1.4411E-07
        2.000 5.1762E-07
SPECS:
    n_is_absolute: false
    λ_is_vacuum: false
    temperature: 20.0 °C
    coefficients_of_thermal_dispersion: -5.51e-06 1.82e-08 -3.64e-10 1.08e-06 1.52e-09 0.28
    n_d: 1.78472
    V_d: 25.9
    glass_code: 785259
    density: 3.3 g/cm<sup>3</sup>
    coefficient_of_thermal_expansion_1: 9.3e-06 K<sup>-1</sup>
    coefficient_of_thermal_expansion_2: 1.05e-05 K<sup>-1</sup>
    ΔP_gF: 0.0144
    climatic_resistance: 1.0
    acid_resistance: 1.0
