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REFERENCES: |
    F. Zernike, Jr.
    Refractive indices of ammonium dihydrogen phosphate and potassium dihydrogen phosphate between 2000 Å and 1.5 µ.
    <a href="https://doi.org/10.1364/JOSA.54.001215"><i>J. Opt. Soc. Am.</i> <b>54</b>, 1215-1219 (1964)</a>.
    As cited in Handbook of Optics, 3rd edition, Vol. 4. McGraw-Hill 2009.
COMMENTS: |
    24.8 °C. Extraordinary ray (e).
CONDITIONS:
    temperature: 297.95
    direction: e
DATA:
  - type: formula 4
    wavelength_range: 0.2138 1.529
    coefficients: 2.163510 5.919896 2 400 1 0.009616676 0 0.01298912 1