# 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: 2.4722418 -0.01073376 2 0.013736108 -2 0.00027440551 -4 -9.8995396e-06 -6 8.2295122e-07 -8
  - type: tabulated k
    data: |
        0.310 6.2618E-06
        0.320 2.4240E-06
        0.330 1.0166E-06
        0.340 4.6209E-07
        0.350 2.2317E-07
        0.360 1.0801E-07
        0.370 8.3618E-08
        0.380 4.8774E-08
        0.390 3.1191E-08
        0.400 6.3726E-09
        0.420 6.6912E-09
        0.440 7.0098E-09
        0.460 7.3285E-09
        0.480 7.6471E-09
        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 5.0764E-08
        1.500 1.4411E-07
        2.000 5.6702E-07
SPECS:
    n_absolute: false
    wavelength_vacuum: false
    temperature: 20.0 °C
    thermal_dispersion:
      - type: "Schott formula"
        coefficients: 1.46e-06 1.54e-08 -2.77e-11 5.04e-07 3.24e-10 0.172
    nd: 1.58445
    Vd: 59.2
    glass_code: 587596
    density: 3.0 g/cm<sup>3</sup>
    thermal_expansion:
      - temperature_range: -30 70 °C
        coefficient: 7.2e-06 K<sup>-1</sup>
      - temperature_range: 20 300 °C
        coefficient: 9.1e-06 K<sup>-1</sup>
    dPgF: -0.0038
    climatic_resistance: 2.0
    acid_resistance: 4.0
