# this file is part of refractiveindex.info database
# refractiveindex.info database is in the public domain
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REFERENCES: |
    D. R. Smith and E. V. Loewenstein.
    Optical constants of far infrared materials. 3: plastics.
    <a href="https://doi.org/10.1364/AO.14.001335"><i>Appl. Opt.</i> <b>14</b>, 1335-1341 (1975)</a>
COMMENTS: |
    HDPE. Measured using approximately 1 mm thick film.
DATA:
  - type: tabulated nk
    data: |
        40.0000 1.519 0.0020
        41.6667 1.519 0.0024
        43.4783 1.519 0.0027
        45.4545 1.520 0.0029
        47.6190 1.521 0.0027
        50.0000 1.521 0.0024
        52.6316 1.521 0.0023
        55.5556 1.521 0.0021
        58.8235 1.521 0.0020
        62.5000 1.521 0.0019
        66.6667 1.521 0.0019
        71.4286 1.521 0.0018
        76.9231 1.520 0.0018
        83.3333 1.520 0.0017
        90.9091 1.520 0.0017
        100.0000 1.521 0.0016
        111.1111 1.521 0.0016
        125.0000 1.521 0.0017
        142.8571 1.521 0.0018
        166.6667 1.519 0.0019
        200.0000 1.518 0.0022