# 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: 3.0523317 -0.010699896 2 0.040026761 -2 0.0027411266 -4 -0.00016825655 -6 2.453957e-05 -8
  - type: tabulated k
    data: |
        0.380 8.0415E-06
        0.390 3.1707E-06
        0.400 1.3712E-06
        0.420 3.8949E-07
        0.440 1.6122E-07
        0.460 8.8925E-08
        0.480 5.3854E-08
        0.500 3.1959E-08
        0.550 1.7542E-08
        0.600 1.9137E-08
        0.650 3.1129E-08
        0.700 2.2326E-08
SPECS:
    n_absolute: false
    wavelength_vacuum: false
    temperature: 25.0 °C
    nd: 1.784718
    Vd: 25.712726
    glass_code: 785257
    glass_status: preferred
    density: 4.79 g/cm<sup>3</sup>
    thermal_expansion:
      - temperature_range: -30 70 °C
        coefficient: 7.4e-06 K<sup>-1</sup>
      - temperature_range: 20 300 °C
        coefficient: 8.4e-06 K<sup>-1</sup>
    dPgF: 0.0129
    acid_resistance: 1.2
    phosphate_resistance: 1.2
