# 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: 3.2503692 -0.013195714 2 0.049790724 -2 0.0022430157 -4 -7.7567761e-06 -6 2.1169316e-05 -8
  - type: tabulated k
    data: |
        0.360 1.9789E-05
        0.370 1.2365E-05
        0.380 6.0109E-06
        0.390 3.2054E-06
        0.400 1.8742E-06
        0.420 7.5836E-07
        0.440 3.7280E-07
        0.460 2.2650E-07
        0.480 1.5593E-07
        0.500 1.1300E-07
        0.550 5.2839E-08
        0.600 4.3166E-08
        0.650 4.6764E-08
        0.700 4.4743E-08
        0.800 3.1911E-08
        1.060 1.6887E-08
        1.500 3.5864E-08
        2.000 3.5405E-07
SPECS:
    n_is_absolute: false
    λ_is_vacuum: false
    temperature: 20.0 °C
    coefficients_of_thermal_dispersion: -6.01e-06 1.26e-08 -1.23e-10 1.06e-06 1.37e-09 0.294
    n_d: 1.84666
    V_d: 23.9
    glass_code: 847239
    density: 3.49 g/cm<sup>3</sup>
    coefficient_of_thermal_expansion_1: 8.9e-06 K<sup>-1</sup>
    coefficient_of_thermal_expansion_2: 1.06e-05 K<sup>-1</sup>
    ΔP_gF: 0.018
    climatic_resistance: 1.0
    acid_resistance: 1.0
