# 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 
    wavelength_range: 0.36 1.55
    coefficients: 2.735741 -0.011476747 2 0.017975035 -2 0.00072020288 -4 -5.1933951e-05 -6 3.5980087e-06 -8
  - type: tabulated k
    data: |
        0.340 5.0617E-06
        0.350 1.9028E-06
        0.360 8.5487E-07
        0.370 4.2021E-07
        0.380 2.4557E-07
        0.390 1.6573E-07
        0.400 1.2001E-07
        0.420 8.8048E-08
        0.440 7.7891E-08
        0.460 6.6490E-08
        0.480 5.7730E-08
        0.500 4.8035E-08
        0.550 4.3988E-08
        0.600 3.8351E-08
        0.650 2.5928E-08
        0.700 1.6736E-08
        0.800 1.2745E-08
        1.060 1.6887E-08
        1.500 9.5877E-08
        2.000 5.8353E-07
SPECS:
    n_absolute: false
    wavelength_vacuum: false
    temperature: 20.0 °C
    thermal_dispersion:
      - type: "Schott formula"
        coefficients: -2.14e-07 1.48e-08 -1.61e-10 5.55e-07 4.75e-10 0.191
    nd: 1.67000
    Vd: 51.7
    glass_code: 670517
    density: 3.78 g/cm<sup>3</sup>
    thermal_expansion:
      - temperature_range: -30 70 °C
        coefficient: 6.3e-06 K<sup>-1</sup>
      - temperature_range: 20 300 °C
        coefficient: 8.5e-06 K<sup>-1</sup>
    dPgF: -0.0042
    climatic_resistance: 1.0
    acid_resistance: 5.0
