# 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: 2.5720683 -0.010564186 2 0.015625643 -2 0.00040593207 -4 -1.3424134e-05 -6 6.4355621e-07 -8
  - type: tabulated k
    data: |
        0.270 6.0810E-06
        0.280 4.7807E-06
        0.290 2.9542E-06
        0.300 1.7572E-06
        0.310 1.0438E-06
        0.320 5.8420E-07
        0.330 3.3868E-07
        0.340 2.1972E-07
        0.350 1.6051E-07
        0.360 8.1359E-08
        0.370 4.4500E-08
        0.380 4.2634E-08
        0.390 2.4928E-08
        0.400 2.5567E-08
        0.420 2.6846E-08
        0.440 1.4034E-08
        0.460 1.4672E-08
        0.480 1.1476E-08
        0.500 7.9657E-09
        0.550 8.7623E-09
        0.600 9.5589E-09
        0.650 1.0355E-08
        0.700 1.1152E-08
        0.800 1.2745E-08
        1.060 1.6887E-08
        1.500 2.3897E-08
        2.000 2.7289E-07
CONDITIONS:
    temperature: 293
PROPERTIES:
    thermal_dispersion:
      - type: formula A
        coefficients: 1.84e-06 1.42e-08 -1.94e-10 5.13e-07 7.12e-10 0.198
    nd: 1.61765
    Vd: 55.1
    glass_code: 618551
    density:
      - value: 3390
    thermal_expansion:
      - temperature_range: 243 343
        value: 7.1e-06
      - temperature_range: 293 573
        value: 8.4e-06
    dPgF: -0.0045
    resistance:
        climatic: 2.0
        acid: 4.0