# 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: 2.652537 -0.02070769 2 0.008235652 -2 0.0025989 -4 -0.0003027232 -6 1.591967e-05 -8
  - type: tabulated k
    data: |
        0.330 1.2093E-05
        0.340 5.3196E-06
        0.350 2.4162E-06
        0.360 1.2341E-06
        0.370 6.5702E-07
        0.380 3.8656E-07
        0.390 2.2856E-07
        0.400 1.4656E-07
        0.420 8.8048E-08
        0.440 7.4313E-08
        0.460 6.2765E-08
        0.480 4.6114E-08
        0.500 3.1959E-08
        0.550 8.7623E-09
        0.600 1.4345E-08
        0.650 1.0355E-08
        0.700 -0.0000E+00
SPECS:
    n_is_absolute: false
    λ_is_vacuum: false
    temperature: 20.0 °C
    n_d: 1.638540
    V_d: 55.479588
    glass_code: 639555
    glass_status: preferred
    density: 3.69 g/cm<sup>3</sup>
    coefficient_of_thermal_expansion_1: 8.1e-06 K<sup>-1</sup>
    ΔP_gF: -0.0021
