# 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 
    range: 0.4 0.7
    coefficients: 2.326858 -0.02496168 2 0.002979231 -2 0.003164392 -4 -0.0003498773 -6 1.777229e-05 -8
  - type: tabulated k
    data: |
        0.300 1.0994E-05
        0.310 3.4199E-06
        0.320 1.0970E-06
        0.330 3.9607E-07
        0.340 1.5592E-07
        0.350 7.0515E-08
        0.360 4.0390E-08
        0.370 2.6619E-08
        0.380 3.0392E-08
        0.390 1.5557E-08
        0.400 1.2758E-08
        0.420 1.0042E-08
        0.440 7.0098E-09
        0.460 3.6624E-09
        0.480 3.8216E-09
        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_is_absolute: false
    λ_is_vacuum: false
    temperature: 20.0 °C
    n_d: 1.531721
    V_d: 49.142236
    glass_code: 532491
    glass_status: preferred
    density: 2.77 g/cm<sup>3</sup>
    coefficient_of_thermal_expansion_1: 9.4e-06 K<sup>-1</sup>
    ΔP_gF: -0.0019
