# 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: |
    
DATA:
  - type: formula 3
    wavelength_range: 0.3 2.4
    coefficients: 2.75779 -0.0087331797 2 0.030379663 -2 0.0011503031 -4 -1.9167784e-05 -6 7.4745415e-06 -8
  - type: tabulated k
    data: |
        0.340 4.9583E-06
        0.350 1.9868E-06
        0.360 1.0218E-06
        0.370 6.2044E-07
        0.380 4.2112E-07
        0.390 2.6215E-07
        0.400 1.8007E-07
        0.420 9.4918E-08
        0.440 5.6476E-08
        0.460 3.6790E-08
        0.480 2.2987E-08
        0.500 1.5947E-08
        0.550 8.7623E-09
        0.600 9.5589E-09
        0.650 1.0355E-08
        0.700 1.1152E-08
        0.800 6.3694E-09
        0.900 7.1656E-09
CONDITIONS:
    temperature: 298
PROPERTIES:
    thermal_dispersion:
      - type: formula A
        coefficients: 8.284e-06 0.0 0.0 0.0 0.0 0.0
    nd: 1.688930
    Vd: 31.082901
    glass_code: 689311
    glass_status: preferred
    density:
      - value: 4220
    thermal_expansion:
      - temperature_range: 243 343
        value: 8.6e-06
      - temperature_range: 293 573
        value: 9.4e-06
    dPgF: 0.0031
    resistance:
        acid: 2.2
        phosphate: 2.0