# 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: 2.780948 -0.0236625 2 0.008676537 -2 0.00294181 -4 -0.0003515541 -6 1.844065e-05 -8
  - type: tabulated k
    data: |
        0.290 4.8930E-06
        0.300 3.2159E-06
        0.310 2.0820E-06
        0.320 1.3871E-06
        0.330 8.6267E-07
        0.340 5.0414E-07
        0.350 2.9345E-07
        0.360 2.0790E-07
        0.370 1.5103E-07
        0.380 9.2107E-08
        0.390 6.2700E-08
        0.400 6.4307E-08
        0.420 3.3591E-08
        0.440 3.5190E-08
        0.460 3.6790E-08
        0.480 3.8389E-08
        0.500 3.9809E-09
        0.550 4.3790E-09
        0.600 4.7770E-09
        0.650 5.1751E-09
        0.700 -0.0000E+00
SPECS:
    n_absolute: false
    wavelength_vacuum: false
    temperature: 20.0 °C
    nd: 1.677900
    Vd: 55.397516
    glass_code: 678554
    glass_status: preferred
    density: 4.0 g/cm<sup>3</sup>
    thermal_expansion:
      - temperature_range: -30 70 °C
        coefficient: 8.6e-06 K<sup>-1</sup>
    dPgF: -0.007
