# 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: 3.4407637 -0.015750622 2 0.059024249 -2 0.0035647556 -4 -0.00012641103 -6 4.0309245e-05 -8
  - type: tabulated k
    data: |
        0.380 1.6697E-05
        0.390 7.7620E-06
        0.400 4.2635E-06
        0.420 1.8379E-06
        0.440 1.1163E-06
        0.460 8.5362E-07
        0.480 6.9336E-07
        0.500 5.4041E-07
        0.550 2.1529E-07
        0.600 1.0134E-07
        0.650 8.3430E-08
        0.700 5.5985E-08
        0.800 3.8312E-08
        1.060 1.6887E-08
        1.500 7.1835E-08
        2.000 4.0295E-07
SPECS:
    n_is_absolute: false
    λ_is_vacuum: false
    temperature: 20.0 °C
    coefficients_of_thermal_dispersion: -3.11e-06 1.75e-08 -2.81e-10 1.25e-06 1.62e-09 0.307
    n_d: 1.90680
    V_d: 21.2
    glass_code: 907212
    density: 4.15 g/cm<sup>3</sup>
    coefficient_of_thermal_expansion_1: 7.4e-06 K<sup>-1</sup>
    coefficient_of_thermal_expansion_2: 1.02e-05 K<sup>-1</sup>
    ΔP_gF: 0.0245
    climatic_resistance: 1.0
    acid_resistance: 1.0
