# 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 1.40691144 0.0105633641 0.128369745 0.0568483105 1.51826191 152.107924
  - type: tabulated k
    data: |
        0.360 5.8448E-06
        0.370 1.8693E-06
        0.380 7.1281E-07
        0.390 3.0294E-07
        0.400 1.6327E-07
        0.420 8.1192E-08
        0.440 5.6476E-08
        0.460 5.1610E-08
        0.480 4.2250E-08
        0.500 3.1959E-08
        0.550 1.7542E-08
        0.600 1.9137E-08
        0.650 2.5928E-08
        0.700 1.6736E-08
        0.800 6.3694E-09
        0.900 1.4338E-08
        1.000 3.1895E-08
        1.200 3.8274E-08
        1.400 6.7046E-08
        1.600 7.6624E-08
        1.800 2.4560E-07
        2.000 4.6837E-07
        2.200 1.2893E-06
        2.400 1.7383E-06
SPECS:
    n_absolute: false
    wavelength_vacuum: false
    temperature: 25.0 °C
    thermal_dispersion:
      - type: "Schott formula"
        coefficients: 5.47e-07 1.4e-08 -3.91e-11 7.23e-07 7.6e-10 0.269
    nd: 1.612929
    Vd: 37.005342
    glass_code: 613370
    glass_status: special
    density: 2.67 g/cm<sup>3</sup>
    thermal_expansion:
      - temperature_range: -30 70 °C
        coefficient: 7.7e-06 K<sup>-1</sup>
      - temperature_range: 20 300 °C
        coefficient: 9.1e-06 K<sup>-1</sup>
    dPgF: 0.0046
    climatic_resistance: 1.0
    acid_resistance: 1.0
    phosphate_resistance: 1.0
