# 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: 2.827081 -0.010220727 2 0.021224097 -2 0.0006653956 -4 -3.3316539e-05 -6 3.16429e-06 -8
  - type: tabulated k
    data: |
        0.340 5.8754E-06
        0.350 2.2426E-06
        0.360 9.1338E-07
        0.370 4.3724E-07
        0.380 2.2270E-07
        0.390 1.3641E-07
        0.400 9.3675E-08
        0.420 6.4114E-08
        0.440 5.6476E-08
        0.460 5.5324E-08
        0.480 4.6114E-08
        0.500 3.5972E-08
        0.550 3.5155E-08
        0.600 2.3933E-08
        0.650 2.5928E-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: -3.22e-06 1.12e-08 -3.14e-10 6.46e-07 6.47e-10 0.204
    n_d: 1.70000
    V_d: 48.0
    glass_code: 700480
    density: 4.02 g/cm<sup>3</sup>
    coefficient_of_thermal_expansion_1: 7.3e-06 K<sup>-1</sup>
    coefficient_of_thermal_expansion_2: 9.6e-06 K<sup>-1</sup>
    ΔP_gF: -0.0034
    climatic_resistance: 1.0
    acid_resistance: 4.0
