# 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: 0.365 2.325
    coefficients: 0 1.92026488 0.0118468028 0.37153524 0.0532105472 2.55205704 204.5493
  - type: tabulated k
    data: |
        0.360 5.0763E-06
        0.370 2.5542E-06
        0.380 1.5447E-06
        0.390 1.0195E-06
        0.400 6.7075E-07
        0.420 3.8949E-07
        0.440 2.3158E-07
        0.460 1.6855E-07
        0.480 1.2423E-07
        0.500 8.8512E-08
        0.550 3.0745E-08
        0.600 2.8734E-08
        0.650 3.1129E-08
        0.700 2.2326E-08
        0.800 1.2745E-08
        0.900 7.1656E-09
        1.000 7.9617E-09
        1.200 9.5541E-09
        1.400 2.2304E-08
        1.600 3.8255E-08
        1.800 1.1505E-07
        2.000 2.5671E-07
        2.200 5.6938E-07
        2.400 1.5717E-06
SPECS:
    n_absolute: false
    wavelength_vacuum: false
    temperature: 25.0 °C
    thermal_dispersion:
      - type: "Schott formula"
        coefficients: -1.2e-06 8.85e-09 -1.11e-11 8.68e-07 1.05e-09 0.282
    nd: 1.850249
    Vd: 30.046429
    density: 4.0 g/cm<sup>3</sup>
    thermal_expansion:
      - temperature_range: -30 70 °C
        coefficient: 7.7e-06 K<sup>-1</sup>
    dPgF: 0.0051
    climatic_resistance: 1.0
    acid_resistance: 3.0
    phosphate_resistance: 1.0
