# 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 "
DATA:
  - type: formula 2 
    wavelength_range: 0.38 2.4
    coefficients: 0 1.75156623 0.0135004681 0.364006304 0.0668245147 2.47874141 170.756006
  - type: tabulated k
    data: |
        0.380 5.9454E-06
        0.390 1.9704E-06
        0.400 8.3195E-07
        0.420 2.8960E-07
        0.440 1.7224E-07
        0.460 1.2284E-07
        0.480 9.6707E-08
        0.500 7.2272E-08
        0.550 3.5155E-08
        0.600 2.8734E-08
        0.650 2.5928E-08
        0.700 2.2326E-08
        0.800 1.9127E-08
        0.900 2.1518E-08
        1.000 3.1895E-08
        1.200 2.8691E-08
        1.400 6.7046E-08
        1.600 1.0227E-07
        1.800 2.3104E-07
        2.000 4.3563E-07
        2.200 1.1954E-06
        2.400 2.4414E-06
SPECS:
    n_absolute: false
    wavelength_vacuum: false
    temperature: 25.0 °C
    thermal_dispersion:
      - type: "Schott formula"
        coefficients: -6.7e-06 1.01e-08 -3.04e-11 8.91e-07 1.32e-09 0.324
    nd: 1.808095
    Vd: 22.760817
    glass_code: 808228
    density: 3.29 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: 1.04e-05 K<sup>-1</sup>
    dPgF: 0.0261
    climatic_resistance: 1.0
    acid_resistance: 1.0
    phosphate_resistance: 1.0
