# 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: 2.2407767 -0.008821111 2 0.011852627 -2 0.00046630703 -4 -2.7146793e-05 -6 2.5187584e-06 -8
  - type: tabulated k
    data: |
        0.320 1.5825E-05
        0.330 1.3030E-05
        0.340 4.2746E-06
        0.350 1.3950E-06
        0.360 5.1316E-07
        0.370 2.4871E-07
        0.380 1.6148E-07
        0.390 9.7732E-08
        0.400 6.7557E-08
        0.420 4.7122E-08
        0.440 3.1655E-08
        0.460 2.2030E-08
        0.480 1.9146E-08
        0.500 7.9657E-09
        0.550 8.7623E-09
        0.600 9.5589E-09
        0.650 1.0355E-08
        0.700 1.1152E-08
        0.800 1.2745E-08
        1.060 1.6887E-08
        1.500 4.7842E-08
        2.000 2.2439E-07
SPECS:
    n_absolute: false
    wavelength_vacuum: false
    temperature: 20.0 °C
    thermal_dispersion:
      - type: "Schott formula"
        coefficients: -9.67e-06 1.6e-08 -1.08e-10 4.97e-07 6.44e-11 0.231
    nd: 1.50847
    Vd: 52.6
    glass_code: 512521
    density: 2.51 g/cm<sup>3</sup>
    thermal_expansion:
      - temperature_range: -30 70 °C
        coefficient: 9.5e-06 K<sup>-1</sup>
      - temperature_range: 20 300 °C
        coefficient: 1e-05 K<sup>-1</sup>
    dPgF: 0.0043
    climatic_resistance: 1.0
    acid_resistance: 4.0
