# 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: 3.1049984 -0.013342479 2 0.027506526 -2 0.00075451621 -4 -1.6565687e-05 -6 2.780481e-06 -8
  - type: tabulated k
    data: |
        0.310 1.5331E-05
        0.320 7.1222E-06
        0.330 3.3335E-06
        0.340 1.7331E-06
        0.350 9.8944E-07
        0.360 5.9661E-07
        0.370 3.7304E-07
        0.380 2.4230E-07
        0.390 1.6246E-07
        0.400 1.2001E-07
        0.420 8.4619E-08
        0.440 6.7167E-08
        0.460 5.1610E-08
        0.480 3.8389E-08
        0.500 2.3945E-08
        0.550 1.3150E-08
        0.600 1.4345E-08
        0.650 1.5541E-08
        0.700 1.1152E-08
        0.800 1.2745E-08
        1.060 1.6887E-08
        1.500 2.3897E-08
        2.000 3.2154E-07
CONDITIONS:
    temperature: 293
PROPERTIES:
    thermal_dispersion:
      - type: formula A
        coefficients: -6.24e-07 1.69e-08 -1.42e-10 6.93e-07 1.19e-09 0.208
    nd: 1.78500
    Vd: 43.7
    glass_code: 785437
    density:
      - value: 4120
    thermal_expansion:
      - temperature_range: 243 343
        value: 6.9e-06
      - temperature_range: 293 573
        value: 8.3e-06
    dPgF: -0.0078
    resistance:
        climatic: 1.0
        acid: 3.0