# 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: 2.5489492 -0.012922911 2 0.018433588 -2 0.00067483064 -4 -2.8837579e-05 -6 3.057603e-06 -8
  - type: tabulated k
    data: |
        0.320 6.7718E-06
        0.330 4.2265E-06
        0.340 2.6179E-06
        0.350 1.6149E-06
        0.360 9.8116E-07
        0.370 5.8431E-07
        0.380 3.5239E-07
        0.390 2.0527E-07
        0.400 1.2994E-07
        0.420 5.7307E-08
        0.440 3.5190E-08
        0.460 2.2030E-08
        0.480 1.5310E-08
        0.500 1.1955E-08
        0.550 1.3150E-08
        0.600 1.4345E-08
        0.650 1.5541E-08
        0.700 1.6736E-08
        0.800 1.9127E-08
        0.900 2.1518E-08
SPECS:
    n_absolute: false
    wavelength_vacuum: false
    temperature: 25.0 °C
    thermal_dispersion:
      - type: "Schott formula"
        coefficients: 7.898e-06 0.0 0.0 0.0 0.0 0.0
    nd: 1.613400
    Vd: 43.841533
    glass_code: 613438
    glass_status: preferred
    density: 3.22 g/cm<sup>3</sup>
    thermal_expansion:
      - temperature_range: -30 70 °C
        coefficient: 5.3e-06 K<sup>-1</sup>
      - temperature_range: 20 300 °C
        coefficient: 6.4e-06 K<sup>-1</sup>
    dPgF: -0.008
    acid_resistance: 53.2
    phosphate_resistance: 4.2
