# 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: 2.988119 -0.03043514 2 0.0237723 -2 0.005097428 -4 -0.0004379463 -6 3.025835e-05 -8
  - type: tabulated k
    data: |
        0.350 1.0896E-05
        0.360 4.3377E-06
        0.370 2.0409E-06
        0.380 1.1221E-06
        0.390 7.3157E-07
        0.400 4.8008E-07
        0.420 2.2821E-07
        0.440 1.1750E-07
        0.460 6.2765E-08
        0.480 2.6832E-08
        0.500 7.9657E-09
        0.550 4.3790E-09
        0.600 4.7770E-09
        0.650 1.0355E-08
        0.700 5.5707E-10
SPECS:
    n_absolute: false
    wavelength_vacuum: false
    temperature: 20.0 °C
    nd: 1.755200
    Vd: 27.641217
    glass_code: 755276
    glass_status: preferred
    density: 4.79 g/cm<sup>3</sup>
    thermal_expansion:
      - temperature_range: -30 70 °C
        coefficient: 8.5e-06 K<sup>-1</sup>
    dPgF: 0.0055
