# 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="https://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="https://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: 3.052913 -0.012276955 2 0.041487837 -2 0.0019043764 -4 -3.1653157e-05 -6 1.7320425e-05 -8
  - type: tabulated k
    data: |
        0.370 6.5804E-06
        0.380 2.2831E-06
        0.390 1.0455E-06
        0.400 6.2393E-07
        0.420 3.4843E-07
        0.440 2.4658E-07
        0.460 1.9934E-07
        0.480 1.6788E-07
        0.500 1.3352E-07
        0.550 7.9499E-08
        0.600 7.2162E-08
        0.650 7.8176E-08
        0.700 6.7249E-08
        0.800 1.9127E-08
        1.060 2.5344E-08
        1.500 1.4411E-07
        2.000 5.1762E-07
CONDITIONS:
    temperature: 293
PROPERTIES:
    thermal_dispersion:
      - type: formula A
        coefficients: -5.51e-06 1.82e-08 -3.64e-10 1.08e-06 1.52e-09 0.28
    nd: 1.78472
    Vd: 25.9
    glass_code: 785259
    density:
      - value: 3300
    thermal_expansion:
      - temperature_range: 243 343
        value: 9.3e-06
      - temperature_range: 293 573
        value: 1.05e-05
    dPgF: 0.0144
    resistance:
        climatic: 1.0
        acid: 1.0