# 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: 0.36 1.55
    coefficients: 2.7644388 -0.011785176 2 0.017957173 -2 0.00034733134 -4 3.6439617e-06 -6 -3.286378e-07 -8
  - type: tabulated k
    data: |
        0.310 9.4155E-06
        0.320 5.0433E-06
        0.330 2.7569E-06
        0.340 1.5688E-06
        0.350 8.8801E-07
        0.360 5.1659E-07
        0.370 2.9391E-07
        0.380 1.8711E-07
        0.390 1.2669E-07
        0.400 9.3675E-08
        0.420 6.4114E-08
        0.440 6.7167E-08
        0.460 5.5324E-08
        0.480 5.7730E-08
        0.500 4.8035E-08
        0.550 4.3988E-08
        0.600 3.8351E-08
        0.650 3.1129E-08
        0.700 2.7922E-08
        0.800 1.2745E-08
        1.060 1.6887E-08
        1.500 3.5864E-08
        2.000 4.6837E-07
CONDITIONS:
    temperature: 293
PROPERTIES:
    thermal_dispersion:
      - type: formula A
        coefficients: -3.52e-06 1.96e-08 -6.9e-11 5.11e-07 4.65e-10 0.152
    nd: 1.67790
    Vd: 55.5
    glass_code: 678555
    density:
      - value: 3980
    thermal_expansion:
      - temperature_range: 243 343
        value: 6.9e-06
      - temperature_range: 293 573
        value: 8.1e-06
    dPgF: -0.0018
    resistance:
        climatic: 1.0
        acid: 3.0