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REFERENCES: |
    1) T. M. Bieniewski and S. J. Czyzak.
    Refractive indexes of single hexagonal ZnS and CdS crystals.
    <a href="https://doi.org/10.1364/JOSA.53.000496"><i>J. Opt. Soc. Am.</i> <b>53</b>, 496-497 (1963)</a><br>
    2) M. Sanchez Gomez, J. M. Guerra, and F. Vilches.
    Weighted nonlinear regression analysis of a Sellmeier expansion: comparison of several nonlinear fits of CdS dispersion.
    <a href="https://doi.org/10.1364/AO.24.001147"><i>Appl. Opt.</i> <b>24</b>, 1147-1150 (1985)</a></br>
    * Ref. 2 provides a dispersion formula based on data from ref. 1
COMMENTS: |
    Ordinary ray (o). 25 °C.
CONDITIONS:
    temperature: 298
    direction: o
DATA:
  - type: formula 4
    wavelength_range: 0.51 1.4
    coefficients: 5.1792 0.23504 0 0.083591 1 0.036927 0 0.23504 1