# 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: 2.8630662 -0.011977981 2 0.032706279 -2 0.0016821116 -4 -7.4783483e-05 -6 1.4696883e-05 -8
  - type: tabulated k
    data: |
        0.360 1.0456E-05
        0.370 4.0466E-06
        0.380 1.9485E-06
        0.390 1.0937E-06
        0.400 6.7862E-07
        0.420 3.0055E-07
        0.440 1.6489E-07
        0.460 1.1150E-07
        0.480 7.3273E-08
        0.500 3.9989E-08
        0.550 8.7623E-09
        0.600 9.5589E-09
        0.650 1.0355E-08
        0.700 1.1152E-08
        0.800 1.2745E-08
        1.060 4.2282E-08
        1.500 1.0792E-07
        2.000 6.4970E-07
SPECS:
    n_is_absolute: false
    λ_is_vacuum: false
    temperature: 20.0 °C
    coefficients_of_thermal_dispersion: -4.82e-06 1.79e-08 -2.28e-10 9.05e-07 2.82e-10 0.28
    n_d: 1.72250
    V_d: 29.2
    glass_code: 723292
    density: 3.01 g/cm<sup>3</sup>
    coefficient_of_thermal_expansion_1: 9.2e-06 K<sup>-1</sup>
    coefficient_of_thermal_expansion_2: 1.19e-05 K<sup>-1</sup>
    ΔP_gF: 0.009
    acid_resistance: 1.0
