# 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: 2.6994624 -0.011441236 2 0.017672891 -2 0.00039604649 -4 -3.5739234e-06 -6 7.0861608e-07 -8
  - type: tabulated k
    data: |
        0.330 1.0273E-05
        0.340 4.5364E-06
        0.350 1.8428E-06
        0.360 8.5101E-07
        0.370 4.4408E-07
        0.380 2.5543E-07
        0.390 1.7228E-07
        0.400 1.1671E-07
        0.420 8.4619E-08
        0.440 6.7167E-08
        0.460 5.5324E-08
        0.480 5.7730E-08
        0.500 4.8035E-08
        0.550 4.3988E-08
        0.600 2.8734E-08
        0.650 2.5928E-08
        0.700 1.6736E-08
        0.800 1.2745E-08
        1.060 1.6887E-08
        1.500 2.3897E-08
        2.000 4.0295E-07
SPECS:
    n_absolute: false
    wavelength_vacuum: false
    temperature: 20.0 °C
    thermal_dispersion:
      - type: "Schott formula"
        coefficients: -2.99e-07 1.21e-08 -1.58e-10 5.15e-07 8.57e-10 0.196
    nd: 1.65830
    Vd: 53.4
    glass_code: 658534
    density: 3.75 g/cm<sup>3</sup>
    thermal_expansion:
      - temperature_range: 20 300 °C
        coefficient: 8.2e-06 K<sup>-1</sup>
    dPgF: -0.0014
    climatic_resistance: 1.0
    acid_resistance: 1.0
