# 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: 0.36 2.4
    coefficients: 0 1.5802363 0.0103578062 0.137504632 0.0548393088 1.60603298 147.982885
  - type: tabulated k
    data: |
        0.360 5.2500E-06
        0.370 1.9826E-06
        0.380 9.1052E-07
        0.390 5.0438E-07
        0.400 3.0020E-07
        0.420 1.5389E-07
        0.440 1.0304E-07
        0.460 8.1431E-08
        0.480 6.1610E-08
        0.500 4.8035E-08
        0.550 2.6340E-08
        0.600 2.8734E-08
        0.650 3.1129E-08
        0.700 2.2326E-08
        0.800 1.2745E-08
        0.900 2.1518E-08
        1.000 2.3909E-08
        1.200 3.8274E-08
        1.400 8.9485E-08
        1.600 8.9440E-08
        1.800 1.7293E-07
        2.000 3.2154E-07
        2.200 9.3489E-07
        2.400 2.4414E-06
SPECS:
    n_absolute: false
    wavelength_vacuum: false
    temperature: 25.0 °C
    thermal_dispersion:
      - type: "Schott formula"
        coefficients: 3.61e-06 1.09e-08 -2.95e-11 7.14e-07 9.64e-10 0.254
    nd: 1.669979
    Vd: 39.271035
    glass_code: 670393
    density: 3.26 g/cm<sup>3</sup>
    thermal_expansion:
      - temperature_range: -30 70 °C
        coefficient: 6.9e-06 K<sup>-1</sup>
      - temperature_range: 20 300 °C
        coefficient: 7.8e-06 K<sup>-1</sup>
    dPgF: 0.0035
    climatic_resistance: 1.0
    acid_resistance: 1.0
    phosphate_resistance: 1.0
