# 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: 0.35 2.4
    coefficients: 0 1.85412979 0.0108438152 0.165450323 0.051405098 1.27255422 109.986837
  - type: tabulated k
    data: |
        0.350 7.8359E-06
        0.360 2.8483E-06
        0.370 1.1792E-06
        0.380 6.0010E-07
        0.390 3.6167E-07
        0.400 2.2416E-07
        0.420 1.2601E-07
        0.440 8.5059E-08
        0.460 5.9043E-08
        0.480 4.2250E-08
        0.500 2.7950E-08
        0.550 1.3150E-08
        0.600 1.4345E-08
        0.650 1.5541E-08
        0.700 1.1152E-08
        0.800 6.3694E-09
        0.900 1.4338E-08
        1.000 1.5931E-08
        1.200 1.9118E-08
        1.400 5.5844E-08
        1.600 7.6624E-08
        1.800 2.0195E-07
        2.000 4.8477E-07
        2.200 1.4028E-06
        2.400 4.7453E-06
SPECS:
    n_absolute: false
    wavelength_vacuum: false
    temperature: 25.0 °C
    thermal_dispersion:
      - type: "Schott formula"
        coefficients: 1.27e-06 1.14e-08 -3.64e-11 6.01e-07 7.23e-10 0.278
    nd: 1.762001
    Vd: 40.100176
    glass_code: 762401
    density: 4.22 g/cm<sup>3</sup>
    thermal_expansion:
      - temperature_range: -30 70 °C
        coefficient: 7.1e-06 K<sup>-1</sup>
      - temperature_range: 20 300 °C
        coefficient: 8.4e-06 K<sup>-1</sup>
    dPgF: -0.0001
    climatic_resistance: 2.0
    acid_resistance: 51.2
    phosphate_resistance: 1.0
