# 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: 2.8917009 -0.011920903 2 0.022558933 -2 0.00079204231 -4 -4.0820426e-05 -6 4.1373045e-06 -8
  - type: tabulated k
    data: |
        0.340 1.0327E-05
        0.350 3.5554E-06
        0.360 1.3191E-06
        0.370 5.6285E-07
        0.380 2.8852E-07
        0.390 1.8214E-07
        0.400 1.2663E-07
        0.420 8.8048E-08
        0.440 6.7167E-08
        0.460 5.5324E-08
        0.480 4.6114E-08
        0.500 3.9989E-08
        0.550 2.1939E-08
        0.600 2.3933E-08
        0.650 1.5541E-08
        0.700 1.1152E-08
        0.800 1.2745E-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: -5.4e-07 2.18e-08 -2.46e-10 5.35e-07 -3.35e-10 0.243
    n_d: 1.72013
    V_d: 46.0
    glass_code: 720460
    density: 3.88 g/cm<sup>3</sup>
    coefficient_of_thermal_expansion_1: 8.1e-06 K<sup>-1</sup>
    coefficient_of_thermal_expansion_2: 8.2e-06 K<sup>-1</sup>
    ΔP_gF: -0.0028
    climatic_resistance: 1.0
    acid_resistance: 4.0
