# 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/ohara_2017-11-30.agf\">OHARA Zemax catalog 2017-11-30</a> (obtained from <a href=\"http://www.ohara-inc.co.jp/en/product/optical/list/\">http://www.ohara-inc.co.jp</a>)<br>See also <a href=\"http://refractiveindex.info/download/data/2017/ohara_2017-11-30.pdf\">OHARA glass data sheets</a>"
COMMENTS: "Recommended - Lightweight "
DATA:
  - type: formula 2 
    wavelength_range: 0.36 2.4
    coefficients: 0 1.44222294 0.0104249404 0.194432265 0.0550235257 1.74092482 169.710769
  - type: tabulated k
    data: |
        0.360 9.2214E-06
        0.370 2.9274E-06
        0.380 1.0786E-06
        0.390 4.6808E-07
        0.400 2.3785E-07
        0.420 1.0180E-07
        0.440 6.7167E-08
        0.460 5.1610E-08
        0.480 4.2250E-08
        0.500 3.5972E-08
        0.550 1.7542E-08
        0.600 1.9137E-08
        0.650 2.5928E-08
        0.700 2.2326E-08
        0.800 1.2745E-08
        0.900 2.1518E-08
        1.000 2.3909E-08
        1.200 3.8274E-08
        1.400 7.8260E-08
        1.600 1.1511E-07
        1.800 2.7477E-07
        2.000 4.8477E-07
        2.200 1.1954E-06
        2.400 1.6757E-06
SPECS:
    n_absolute: false
    wavelength_vacuum: false
    temperature: 25.0 °C
    thermal_dispersion:
      - type: "Schott formula"
        coefficients: -1.42e-06 1.44e-08 -3.73e-11 7.64e-07 8.16e-10 0.281
    nd: 1.647689
    Vd: 33.792803
    glass_code: 648338
    density: 2.79 g/cm<sup>3</sup>
    thermal_expansion:
      - temperature_range: -30 70 °C
        coefficient: 8.3e-06 K<sup>-1</sup>
      - temperature_range: 20 300 °C
        coefficient: 9.8e-06 K<sup>-1</sup>
    dPgF: 0.007
    climatic_resistance: 1.0
    acid_resistance: 1.0
    phosphate_resistance: 1.0
