# 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: ""
DATA:
  - type: formula 2 
    wavelength_range: 0.3 2.4
    coefficients: 0 1.498643 0.009643255 0.2175678 0.04511666 1.559728 171.1121
  - type: tabulated k
    data: |
        0.330 8.4529E-06
        0.340 3.1688E-06
        0.350 1.2869E-06
        0.360 6.0367E-07
        0.370 3.4312E-07
        0.380 2.0971E-07
        0.390 1.4615E-07
        0.400 1.0352E-07
        0.420 6.0709E-08
        0.440 4.5817E-08
        0.460 3.3094E-08
        0.480 2.2987E-08
        0.500 1.5947E-08
        0.550 4.3790E-09
        0.600 9.5589E-09
        0.650 1.0355E-08
        0.700 1.1152E-08
        0.800 6.3694E-09
        0.900 1.4338E-08
        1.000 1.5931E-08
        1.200 2.8691E-08
        1.400 7.8260E-08
        1.600 6.3822E-08
        1.800 1.7293E-07
        2.400 1.4454E-06
SPECS:
    n_absolute: false
    wavelength_vacuum: false
    temperature: 25.0 °C
    thermal_dispersion:
      - type: "Schott formula"
        coefficients: 6.7962e-06 0.0 0.0 0.0 0.0 0.0
    nd: 1.669979
    Vd: 39.279752
    glass_code: 670393
    glass_status: preferred
    density: 4.02 g/cm<sup>3</sup>
    thermal_expansion:
      - temperature_range: -30 70 °C
        coefficient: 7e-06 K<sup>-1</sup>
      - temperature_range: 20 300 °C
        coefficient: 8.1e-06 K<sup>-1</sup>
    acid_resistance: 1.2
    phosphate_resistance: 1.0
