# 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: 3.3380677 -0.014969129 2 0.032739414 -2 0.0011048947 -4 -3.8597399e-05 -6 4.5931893e-06 -8
  - type: tabulated k
    data: |
        0.320 6.3688E-06
        0.330 3.1705E-06
        0.340 1.8378E-06
        0.350 1.1405E-06
        0.360 7.4504E-07
        0.370 5.1336E-07
        0.380 3.4560E-07
        0.390 2.4867E-07
        0.400 2.0034E-07
        0.420 1.4690E-07
        0.440 1.1388E-07
        0.460 1.0019E-07
        0.480 8.4972E-08
        0.500 6.0135E-08
        0.550 3.9569E-08
        0.600 3.8351E-08
        0.650 2.0732E-08
        0.700 2.2326E-08
        0.800 2.5516E-08
        1.060 1.6887E-08
        1.500 2.3897E-08
        2.000 3.5405E-07
SPECS:
    n_absolute: false
    wavelength_vacuum: false
    temperature: 20.0 °C
    thermal_dispersion:
      - type: "Schott formula"
        coefficients: 4.01e-06 1.77e-08 -2.37e-10 7.39e-07 1.02e-09 0.227
    nd: 1.85375
    Vd: 40.6
    glass_code: 854406
    density: 5.0 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: 7e-06 K<sup>-1</sup>
    dPgF: -0.0089
    climatic_resistance: 1.0
    acid_resistance: 3.0
