# 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/nikon_2017-11.agf">NIKON Zemax catalog 2017-11</a> (obtained from <a href="http://www.nikon.com/products/glass/lineup/materials/optical/">http://www.nikon.com</a>)<br>See also <a href="https://refractiveindex.info/download/data/2017/hikari_2017-04-01.pdf">HIKARI glass data sheets</a>
COMMENTS: |
    Low	Tg	glass
DATA:
  - type: formula 3
    wavelength_range: 0.4 0.7
    coefficients: 3.2257027 -0.0126902501 2 0.0306614932 -2 0.000658747108 -4 9.44972029e-06 -6 1.26490053e-06 -8 -0.000120031201 4
  - type: tabulated k
    data: |
        0.320 9.9619E-06
        0.330 4.3612E-06
        0.340 2.1605E-06
        0.350 1.1998E-06
        0.360 7.1179E-07
        0.370 4.4408E-07
        0.380 2.8852E-07
        0.390 1.9534E-07
        0.400 1.4323E-07
        0.420 9.4918E-08
        0.440 7.4313E-08
        0.460 5.5324E-08
        0.480 3.8389E-08
        0.500 2.7950E-08
        0.550 1.7542E-08
        0.600 9.5589E-09
        0.650 5.1751E-09
        0.700 5.5732E-09
        0.800 6.3694E-09
        0.900 2.8705E-08
        1.000 3.9889E-08
        1.200 2.8691E-08
        1.400 5.5844E-08
        1.600 1.1511E-07
        1.800 2.0195E-07
        2.000 4.5199E-07
        2.200 1.0460E-06
        2.400 4.2617E-06
CONDITIONS:
    temperature: 296
PROPERTIES:
    nd: 1.820980
    Vd: 42.656255
    glass_status: preferred
    density:
      - value: 4980
    thermal_expansion:
      - temperature_range: 243 343
        value: 6.8e-06
    dPgF: -0.008