# 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: 2.5737917 -0.0093452955 2 0.017645209 -2 0.00035765081 -4 1.1614434e-06 -6 1.16034e-06 -8
  - type: tabulated k
    data: |
        0.340 8.5771E-06
        0.350 3.0963E-06
        0.360 1.2341E-06
        0.370 5.3800E-07
        0.380 2.9184E-07
        0.390 1.8214E-07
        0.400 1.1340E-07
        0.420 6.4114E-08
        0.440 5.2919E-08
        0.460 4.4192E-08
        0.480 3.8389E-08
        0.500 3.5972E-08
        0.550 2.6340E-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 2.3897E-08
        2.000 3.0530E-07
SPECS:
    n_is_absolute: false
    λ_is_vacuum: false
    temperature: 20.0 °C
    coefficients_of_thermal_dispersion: -3.89e-06 1.55e-08 -1.07e-10 6.07e-07 4.29e-10 0.203
    n_d: 1.62012
    V_d: 49.8
    glass_code: 620498
    density: 3.29 g/cm<sup>3</sup>
    coefficient_of_thermal_expansion_1: 8.3e-06 K<sup>-1</sup>
    coefficient_of_thermal_expansion_2: 9.8e-06 K<sup>-1</sup>
    ΔP_gF: -0.0004
    climatic_resistance: 2.0
    acid_resistance: 3.0
