# 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: 3.0365333 -0.012640924 2 0.023542665 -2 0.00054022154 -4 3.5952261e-06 -6 -3.549746e-07 -8
  - type: tabulated k
    data: |
        0.300 7.2492E-06
        0.310 4.4599E-06
        0.320 2.1080E-06
        0.330 1.2809E-06
        0.340 7.9283E-07
        0.350 4.6250E-07
        0.360 2.6389E-07
        0.370 1.6034E-07
        0.380 9.5226E-08
        0.390 5.0058E-08
        0.400 3.5208E-08
        0.420 1.6753E-08
        0.440 1.4034E-08
        0.460 1.4672E-08
        0.480 1.5310E-08
        0.500 1.5947E-08
        0.550 1.7542E-08
        0.600 1.9137E-08
        0.650 2.0732E-08
        0.700 2.2326E-08
        0.800 2.5516E-08
        1.060 3.3809E-08
        1.500 4.7842E-08
        2.000 5.1762E-07
CONDITIONS:
    temperature: 293
PROPERTIES:
    thermal_dispersion:
      - type: formula A
        coefficients: 2.67e-06 1.57e-08 -3.04e-10 6.28e-07 3.17e-10 0.192
    nd: 1.76209
    Vd: 49.6
    glass_code: 766498
    density:
      - value: 4750
    thermal_expansion:
      - temperature_range: 243 343
        value: 6.3e-06
      - temperature_range: 293 573
        value: 8.1e-06
    dPgF: -0.0068
    resistance:
        climatic: 1.0
        acid: 3.0