# 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: 3.1712708 -0.014897108 2 0.028163952 -2 0.00083222761 -4 -1.9276093e-05 -6 2.7257034e-06 -8
  - type: tabulated k
    data: |
        0.330 1.2679E-05
        0.340 5.2060E-06
        0.350 2.2240E-06
        0.360 1.0630E-06
        0.370 5.6641E-07
        0.380 3.2533E-07
        0.390 2.1856E-07
        0.400 1.5324E-07
        0.420 9.4918E-08
        0.440 7.0738E-08
        0.460 6.2765E-08
        0.480 4.2250E-08
        0.500 2.7950E-08
        0.550 2.1939E-08
        0.600 2.8734E-08
        0.650 2.5928E-08
        0.700 2.2326E-08
        0.800 1.2745E-08
        1.060 1.6887E-08
        1.500 2.3897E-08
        2.000 4.6837E-07
SPECS:
    n_absolute: false
    wavelength_vacuum: false
    temperature: 20.0 °C
    thermal_dispersion:
      - type: "Schott formula"
        coefficients: 4.79e-06 1.51e-08 -1.35e-10 6.25e-07 7.77e-10 0.229
    nd: 1.80400
    Vd: 43.6
    glass_code: 804436
    density: 4.71 g/cm<sup>3</sup>
    thermal_expansion:
      - temperature_range: -30 70 °C
        coefficient: 5.8e-06 K<sup>-1</sup>
      - temperature_range: 20 300 °C
        coefficient: 7.2e-06 K<sup>-1</sup>
    dPgF: -0.0078
    climatic_resistance: 1.0
    acid_resistance: 3.0
