# 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: 0.36 1.55
    coefficients: 2.8508369 -0.012006057 2 0.025904826 -2 0.0009056149 -4 -2.8090015e-05 -6 4.695922e-06 -8
  - type: tabulated k
    data: |
        0.340 6.0469E-06
        0.350 2.2426E-06
        0.360 1.0465E-06
        0.370 5.3094E-07
        0.380 3.0185E-07
        0.390 1.9203E-07
        0.400 1.2663E-07
        0.420 8.4619E-08
        0.440 6.7167E-08
        0.460 5.5324E-08
        0.480 4.6114E-08
        0.500 4.8035E-08
        0.550 3.5155E-08
        0.600 2.3933E-08
        0.650 1.5541E-08
        0.700 1.6736E-08
        0.800 1.2745E-08
        1.060 1.6887E-08
        1.500 2.3897E-08
        2.000 6.0004E-07
SPECS:
    n_is_absolute: false
    λ_is_vacuum: false
    temperature: 20.0 °C
    coefficients_of_thermal_dispersion: 1.49e-05 1.99e-08 -2.6e-10 8.88e-07 7.78e-10 0.234
    n_d: 1.71143
    V_d: 38.9
    glass_code: 714389
    density: 3.72 g/cm<sup>3</sup>
    coefficient_of_thermal_expansion_1: 4.9e-06 K<sup>-1</sup>
    coefficient_of_thermal_expansion_2: 6e-06 K<sup>-1</sup>
    ΔP_gF: -0.0047
    climatic_resistance: 2.0
    acid_resistance: 4.0
