# 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 3 
    wavelength_range: 0.3 2.4
    coefficients: 3.1224406 -0.015600077 2 0.023832255 -2 0.00072563954 -4 -3.0563799e-05 -6 2.0883401e-06 -8
  - type: tabulated k
    data: |
        0.310 6.2307E-06
        0.320 4.2290E-06
        0.330 2.8330E-06
        0.340 1.8754E-06
        0.350 1.1573E-06
        0.360 7.1179E-07
        0.370 4.4408E-07
        0.380 2.7193E-07
        0.390 1.7557E-07
        0.400 1.2663E-07
        0.420 8.1192E-08
        0.440 6.0036E-08
        0.460 4.4192E-08
        0.480 2.6832E-08
        0.500 1.9944E-08
        0.550 1.7542E-08
        0.600 1.9137E-08
        0.650 2.5928E-08
        0.700 2.7922E-08
SPECS:
    n_absolute: false
    wavelength_vacuum: false
    temperature: 25.0 °C
    thermal_dispersion:
      - type: "Schott formula"
        coefficients: 2.29e-06 1.57e-08 4.79e-12 6.43e-07 2.12e-10 0.137
    nd: 1.786500
    Vd: 50.001717
    glass_code: 787500
    glass_status: special
    density: 4.79 g/cm<sup>3</sup>
    thermal_expansion:
      - temperature_range: -30 70 °C
        coefficient: 6.3e-06 K<sup>-1</sup>
      - temperature_range: 20 300 °C
        coefficient: 7.7e-06 K<sup>-1</sup>
    dPgF: -0.0093
    climatic_resistance: 1.0
    acid_resistance: 4.0
    phosphate_resistance: 1.0
