# 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: 0.31 2.4
    coefficients: 0 1.52812575 0.00776817644 0.367965267 0.0272026548 1.11751784 88.86974
  - type: tabulated k
    data: |
        0.310 6.5601E-06
        0.320 3.8557E-06
        0.330 2.4062E-06
        0.340 1.4738E-06
        0.350 9.1495E-07
        0.360 5.3379E-07
        0.370 3.4312E-07
        0.380 1.9677E-07
        0.390 1.2993E-07
        0.400 9.0398E-08
        0.420 5.7307E-08
        0.440 4.2271E-08
        0.460 3.3094E-08
        0.480 2.2987E-08
        0.500 1.5947E-08
        0.550 8.7623E-09
        0.600 1.4345E-08
        0.650 1.0355E-08
        0.700 1.1152E-08
        0.800 1.2745E-08
        0.900 1.4338E-08
        1.000 1.5931E-08
        1.200 1.9118E-08
        1.400 3.3473E-08
        1.600 5.1032E-08
        1.800 1.4396E-07
        2.000 4.6837E-07
        2.200 1.4217E-06
        2.400 6.5411E-06
CONDITIONS:
    temperature: 298
PROPERTIES:
    thermal_dispersion:
      - type: formula A
        coefficients: 4.83e-06 1.07e-08 -3.51e-11 5.85e-07 6.98e-10 0.196
    nd: 1.719995
    Vd: 50.230564
    glass_code: 720502
    density:
      - value: 3860
    thermal_expansion:
      - temperature_range: 243 343
        value: 6.1e-06
      - temperature_range: 293 573
        value: 7.6e-06
    dPgF: -0.0081
    resistance:
        climatic: 2.0
        acid: 52.2
        phosphate: 3.0