# 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 - High Index "
DATA:
  - type: formula 2 
    wavelength_range: 0.39 2.4
    coefficients: 0 2.0386951 0.0170796224 0.437269641 0.0749254813 2.96711461 174.155354
  - type: tabulated k
    data: |
        0.390 1.2141E-05
        0.400 4.5427E-06
        0.420 1.1921E-06
        0.440 5.6905E-07
        0.460 3.4523E-07
        0.480 2.5264E-07
        0.500 1.9154E-07
        0.550 9.7364E-08
        0.600 5.7642E-08
        0.650 5.1986E-08
        0.700 3.9130E-08
        0.800 2.5516E-08
        0.900 2.8705E-08
        1.000 3.1895E-08
        1.200 2.8691E-08
        1.400 3.3473E-08
        1.600 5.1032E-08
        1.800 1.1505E-07
        2.000 1.9214E-07
        2.200 4.0736E-07
        2.400 7.5976E-07
SPECS:
    n_absolute: false
    wavelength_vacuum: false
    temperature: 25.0 °C
    thermal_dispersion:
      - type: "Schott formula"
        coefficients: -4.13e-06 1.29e-08 -2.65e-11 1.02e-06 1.58e-09 0.337
    nd: 1.922860
    Vd: 18.896912
    glass_code: 923189
    density: 3.58 g/cm<sup>3</sup>
    thermal_expansion:
      - temperature_range: -30 70 °C
        coefficient: 6.7e-06 K<sup>-1</sup>
      - temperature_range: 20 300 °C
        coefficient: 8.3e-06 K<sup>-1</sup>
    dPgF: 0.0386
    climatic_resistance: 1.0
    acid_resistance: 1.0
    phosphate_resistance: 1.0
