# 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 2 
    wavelength_range: 0.3 2.4
    coefficients: 0 1.706024 0.009579771 0.182716 0.04044097 1.204833 127.571
  - type: tabulated k
    data: |
        0.340 9.4875E-06
        0.350 3.9748E-06
        0.360 1.7652E-06
        0.370 8.4704E-07
        0.380 4.5608E-07
        0.390 2.3860E-07
        0.400 1.4990E-07
        0.420 7.7770E-08
        0.440 5.6476E-08
        0.460 4.0489E-08
        0.480 3.0681E-08
        0.500 1.9944E-08
        0.550 8.7623E-09
        0.600 1.4345E-08
        0.650 2.0732E-08
        0.700 1.6736E-08
        0.800 1.2745E-08
        0.900 1.4338E-08
        1.000 2.3909E-08
        1.200 2.8691E-08
        1.400 5.5844E-08
        1.600 8.9440E-08
        1.800 2.3104E-07
        2.400 3.5586E-06
SPECS:
    n_absolute: false
    wavelength_vacuum: false
    temperature: 25.0 °C
    thermal_dispersion:
      - type: "Schott formula"
        coefficients: -1.7708e-06 0.0 0.0 0.0 0.0 0.0
    nd: 1.720002
    Vd: 46.035166
    glass_code: 720460
    glass_status: preferred
    density: 4.28 g/cm<sup>3</sup>
    thermal_expansion:
      - temperature_range: -30 70 °C
        coefficient: 8.5e-06 K<sup>-1</sup>
      - temperature_range: 20 300 °C
        coefficient: 9.6e-06 K<sup>-1</sup>
    dPgF: -0.002
    acid_resistance: 53.2
    phosphate_resistance: 3.2
