# 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: 0.32 2.4
    coefficients: 0 1.06368789 0.018519964 0.744939067 0.00116295862 1.59178942 156.636025
  - type: tabulated k
    data: |
        0.320 9.9619E-06
        0.330 3.9762E-06
        0.340 1.7177E-06
        0.350 8.0126E-07
        0.360 3.9896E-07
        0.370 1.9789E-07
        0.380 1.1715E-07
        0.390 7.2215E-08
        0.400 4.4878E-08
        0.420 3.0216E-08
        0.440 2.8124E-08
        0.460 2.2030E-08
        0.480 1.5310E-08
        0.500 1.1955E-08
        0.550 8.7623E-09
        0.600 1.4345E-08
        0.650 1.5541E-08
        0.700 1.1152E-08
        0.800 6.3694E-09
        0.900 1.4338E-08
        1.000 1.5931E-08
        1.200 9.5541E-09
        1.400 3.3473E-08
        1.600 5.1032E-08
        1.800 1.5844E-07
        2.000 3.7033E-07
        2.200 1.0460E-06
        2.400 3.3299E-06
CONDITIONS:
    temperature: 298
PROPERTIES:
    thermal_dispersion:
      - type: formula A
        coefficients: -6.04e-07 8.69e-09 -3.71e-11 6.22e-07 5.61e-10 0.185
    nd: 1.693495
    Vd: 50.810652
    glass_code: 694508
    density:
      - value: 4030
    thermal_expansion:
      - temperature_range: 243 343
        value: 7.5e-06
      - temperature_range: 293 573
        value: 8.6e-06
    dPgF: -0.0047
    resistance:
        climatic: 3.0
        acid: 52.2
        phosphate: 2.2