# 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: 2.3725199 -0.0067756972 2 0.01066551 -2 0.00018548975 -4 -5.7674134e-06 -6 3.2946743e-07 -8
  - type: tabulated k
    data: |
        0.270 6.2816E-06
        0.280 5.3438E-06
        0.290 4.1243E-06
        0.300 2.9298E-06
        0.310 1.8761E-06
        0.320 1.1141E-06
        0.330 6.1644E-07
        0.340 3.4940E-07
        0.350 1.6863E-07
        0.360 8.6333E-08
        0.370 5.9065E-08
        0.380 5.0525E-08
        0.390 3.1082E-08
        0.400 3.1879E-08
        0.420 3.3473E-08
        0.440 4.6779E-08
        0.460 3.6661E-08
        0.480 3.8255E-08
        0.500 2.6552E-08
        0.550 2.9208E-08
        0.600 4.7818E-08
        0.650 5.1803E-08
        0.700 3.7173E-08
        0.800 4.2484E-08
        1.060 5.6291E-08
        1.500 7.9657E-08
        2.000 1.0621E-07
CONDITIONS:
    temperature: 293
PROPERTIES:
    thermal_dispersion:
      - type: formula A
        coefficients: -1.34e-05 6.83e-09 1.81e-11 3.74e-07 5.55e-10 0.195
    nd: 1.55000
    Vd: 71.9
    glass_code: 552720
    density:
      - value: 3760
    thermal_expansion:
      - temperature_range: 243 343
        value: 1.08e-05
      - temperature_range: 293 573
        value: 1.29e-05
    dPgF: 0.0178
    resistance:
        climatic: 1.0
        acid: 2.0