# 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=\"http://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=\"http://refractiveindex.info/download/data/2017/hikari_2017-04-01.pdf\">HIKARI glass data sheets</a>"
COMMENTS: ""
DATA:
  - type: formula 3 
    wavelength_range: 0.4 0.7
    coefficients: 2.78212 0.003869888 2 0.03229938 -2 -0.003179159 -4 0.0004358368 -6 -2.062241e-05 -8
  - type: tabulated k
    data: |
        0.310 1.1361E-05
        0.320 8.9294E-06
        0.330 5.7964E-06
        0.340 3.5426E-06
        0.350 2.1628E-06
        0.360 1.2785E-06
        0.370 7.3156E-07
        0.380 4.2112E-07
        0.390 2.4531E-07
        0.400 1.5324E-07
        0.420 5.7307E-08
        0.440 3.5190E-08
        0.460 1.8349E-08
        0.480 3.8216E-09
        0.500 3.9809E-09
        0.550 4.3790E-09
        0.600 1.9137E-08
        0.650 2.0732E-08
        0.700 2.2326E-08
SPECS:
    n_absolute: false
    wavelength_vacuum: false
    temperature: 20.0 °C
    nd: 1.691000
    Vd: 54.814152
    glass_code: 691548
    glass_status: preferred
    density: 3.46 g/cm<sup>3</sup>
    thermal_expansion:
      - temperature_range: -30 70 °C
        coefficient: 7.7e-06 K<sup>-1</sup>
    dPgF: -0.0088
