# 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: 2.439252 -0.005116676 2 0.02191912 -2 -0.000308089 -4 0.0001181173 -6 -4.409047e-06 -8
  - type: tabulated k
    data: |
        0.310 1.1361E-05
        0.320 3.1522E-06
        0.330 8.9940E-07
        0.340 3.1530E-07
        0.350 1.4286E-07
        0.360 4.0390E-08
        0.370 1.4759E-08
        0.380 1.5158E-08
        0.390 3.1051E-09
        0.400 3.1847E-09
        0.420 3.3439E-09
        0.440 3.5032E-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 5.5707E-10
SPECS:
    n_is_absolute: false
    λ_is_vacuum: false
    temperature: 20.0 °C
    n_d: 1.581440
    V_d: 40.777871
    glass_code: 581408
    glass_status: preferred
    density: 3.24 g/cm<sup>3</sup>
    coefficient_of_thermal_expansion_1: 1.06e-05 K<sup>-1</sup>
    ΔP_gF: -0.0008
