# 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: 0.4 1.55
    coefficients: 3.2643191 -0.016265121 2 0.03202838 -2 0.0015271854 -4 -4.7775544e-05 -6 5.7345907e-06 -8
  - type: tabulated k
    data: |
        0.340 9.4875E-06
        0.350 6.6759E-06
        0.360 3.0239E-06
        0.370 1.5386E-06
        0.380 8.7801E-07
        0.390 5.4851E-07
        0.400 3.7094E-07
        0.420 2.1749E-07
        0.440 1.5024E-07
        0.460 1.1527E-07
        0.480 8.4972E-08
        0.500 6.0135E-08
        0.550 3.0745E-08
        0.600 2.3933E-08
        0.650 1.0355E-08
        0.700 1.1152E-08
        0.800 1.2745E-08
        1.060 1.6887E-08
        1.500 2.3897E-08
        2.000 4.3563E-07
SPECS:
    n_absolute: false
    wavelength_vacuum: false
    temperature: 20.0 °C
    thermal_dispersion:
      - type: "Schott formula"
        coefficients: 2.04e-06 1.48e-08 -2.22e-10 7.19e-07 7.99e-10 0.248
    nd: 1.83400
    Vd: 37.3
    glass_code: 834373
    density: 4.18 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: 7.5e-06 K<sup>-1</sup>
    dPgF: -0.0024
    climatic_resistance: 1.0
    acid_resistance: 3.0
