# 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: 2.249554 0.002262245 2 0.02217465 -2 -0.002282488 -4 0.0003444373 -6 -1.737741e-05 -8
  - type: tabulated k
    data: |
        0.310 1.7598E-06
        0.320 5.6823E-07
        0.330 2.1611E-07
        0.340 8.5202E-08
        0.350 3.3625E-08
        0.360 1.4360E-08
        0.370 8.8464E-09
        0.380 1.2120E-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_absolute: false
    wavelength_vacuum: false
    temperature: 20.0 °C
    nd: 1.517420
    Vd: 52.304670
    glass_code: 517523
    glass_status: preferred
    density: 2.66 g/cm<sup>3</sup>
    thermal_expansion:
      - temperature_range: -30 70 °C
        coefficient: 8.3e-06 K<sup>-1</sup>
    dPgF: -0.0007
