# 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: 2.780768 -0.011432782 2 0.02823867 -2 0.0009260712 -4 5.9615098e-06 -6 5.5996227e-06 -8
  - type: tabulated k
    data: |
        0.340 1.8690E-05
        0.350 9.5010E-06
        0.360 3.7510E-06
        0.370 1.7549E-06
        0.380 9.6412E-07
        0.390 6.0079E-07
        0.400 4.0329E-07
        0.420 2.0680E-07
        0.440 1.3929E-07
        0.460 1.0773E-07
        0.480 7.7169E-08
        0.500 5.6098E-08
        0.550 2.6340E-08
        0.600 2.8734E-08
        0.650 3.1129E-08
        0.700 3.3523E-08
        0.800 2.5516E-08
        1.060 1.6887E-08
        1.500 2.3897E-08
        2.000 5.0119E-07
CONDITIONS:
    temperature: 293
PROPERTIES:
    thermal_dispersion:
      - type: formula A
        coefficients: -4.77e-06 1.49e-08 -1.38e-10 7.8e-07 7.44e-10 0.271
    nd: 1.69320
    Vd: 33.7
    glass_code: 693337
    density:
      - value: 3130
    thermal_expansion:
      - temperature_range: 243 343
        value: 9.1e-06
      - temperature_range: 293 573
        value: 1.21e-05
    dPgF: 0.0055
    resistance:
        climatic: 1.0
        acid: 1.0