# 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: 3.1766024 -0.015214563 2 0.026674405 -2 0.00074674513 -4 -2.63508e-05 -6 2.7514981e-06 -8
  - type: tabulated k
    data: |
        0.310 1.3070E-05
        0.320 5.6675E-06
        0.330 2.7719E-06
        0.340 1.5209E-06
        0.350 8.9568E-07
        0.360 5.6852E-07
        0.370 3.9653E-07
        0.380 2.7524E-07
        0.390 2.1523E-07
        0.400 1.7334E-07
        0.420 1.3644E-07
        0.440 1.2112E-07
        0.460 1.1150E-07
        0.480 1.0455E-07
        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 4.6837E-07
SPECS:
    n_absolute: false
    wavelength_vacuum: false
    temperature: 20.0 °C
    thermal_dispersion:
      - type: "Schott formula"
        coefficients: 1.72e-06 1.48e-08 -1.94e-10 5.94e-07 9.48e-10 0.205
    nd: 1.80400
    Vd: 46.6
    glass_code: 804466
    density: 4.72 g/cm<sup>3</sup>
    thermal_expansion:
      - temperature_range: -30 70 °C
        coefficient: 5.9e-06 K<sup>-1</sup>
      - temperature_range: 20 300 °C
        coefficient: 7.4e-06 K<sup>-1</sup>
    dPgF: -0.0098
    climatic_resistance: 1.0
    acid_resistance: 3.0
