# 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="https://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="https://refractiveindex.info/download/data/2017/ohara_2017-11-30.pdf">OHARA glass data sheets</a>
COMMENTS: |
    Recommended 
DATA:
  - type: formula 2
    wavelength_range: 0.34 2.4
    coefficients: 0 1.7713 0.00976652444 0.19581423 0.0412718628 1.19487834 110.458122
  - type: tabulated k
    data: |
        0.340 8.7091E-06
        0.350 3.4477E-06
        0.360 1.5116E-06
        0.370 7.3156E-07
        0.380 4.2112E-07
        0.390 2.4196E-07
        0.400 1.6327E-07
        0.420 9.1481E-08
        0.440 6.0036E-08
        0.460 4.7899E-08
        0.480 3.0681E-08
        0.500 1.9944E-08
        0.550 1.3150E-08
        0.600 1.4345E-08
        0.650 1.5541E-08
        0.700 1.1152E-08
        0.800 6.3694E-09
        0.900 2.1518E-08
        1.000 2.3909E-08
        1.200 9.5541E-09
        1.400 3.3473E-08
        1.600 5.1032E-08
        1.800 1.7293E-07
        2.000 4.6837E-07
        2.200 1.3082E-06
        2.400 4.5020E-06
CONDITIONS:
    temperature: 298
PROPERTIES:
    thermal_dispersion:
      - type: formula A
        coefficients: 3.01e-07 1.12e-08 -3.68e-11 6.07e-07 6.45e-10 0.245
    nd: 1.743997
    Vd: 44.786431
    glass_code: 744448
    density:
      - value: 4320
    thermal_expansion:
      - temperature_range: 243 343
        value: 7.4e-06
      - temperature_range: 293 573
        value: 8.7e-06
    dPgF: -0.0035
    resistance:
        climatic: 2.0
        acid: 52.2
        phosphate: 3.0