# 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 1.84213306 0.0094399322 0.175468631 0.0395281122 1.25750878 86.5463013
  - type: tabulated k
    data: |
        0.340 8.1054E-06
        0.350 3.0879E-06
        0.360 1.2341E-06
        0.370 5.8431E-07
        0.380 2.8852E-07
        0.390 1.7557E-07
        0.400 1.2001E-07
        0.420 7.0935E-08
        0.440 5.2919E-08
        0.460 3.6790E-08
        0.480 2.6832E-08
        0.500 1.9944E-08
        0.550 1.3150E-08
        0.600 1.4345E-08
        0.650 1.0355E-08
        0.700 1.1152E-08
        0.800 6.3694E-09
        0.900 1.4338E-08
        1.000 2.3909E-08
        1.200 2.8691E-08
        1.400 1.0072E-07
        1.600 1.1511E-07
        1.800 2.7477E-07
        2.000 7.4949E-07
        2.200 2.4381E-06
        2.400 9.1298E-06
CONDITIONS:
    temperature: 298
PROPERTIES:
    thermal_dispersion:
      - type: formula A
        coefficients: 4.27e-06 1.66e-08 -3.72e-11 4.44e-07 5.21e-10 0.257
    nd: 1.756998
    Vd: 47.823170
    glass_code: 757478
    density:
      - value: 4080
    thermal_expansion:
      - temperature_range: 243 343
        value: 5.7e-06
      - temperature_range: 293 573
        value: 6.9e-06
    dPgF: -0.0076
    resistance:
        climatic: 1.0
        acid: 51.0
        phosphate: 2.0