# 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: 0.33 2.4
    coefficients: 0 1.61344136 0.0106386752 0.257295888 0.0487071624 1.98364455 159.784404
  - type: tabulated k
    data: |
        0.330 9.2084E-06
        0.340 3.8613E-06
        0.350 1.9868E-06
        0.360 1.1473E-06
        0.370 6.9405E-07
        0.380 4.5608E-07
        0.390 2.9952E-07
        0.400 2.1053E-07
        0.420 1.2948E-07
        0.440 9.9438E-08
        0.460 7.7690E-08
        0.480 6.1610E-08
        0.500 4.4010E-08
        0.550 1.7542E-08
        0.600 1.4345E-08
        0.650 1.5541E-08
        0.700 1.1152E-08
        0.800 6.3694E-09
        0.900 7.1656E-09
        1.000 7.9617E-09
        1.200 9.5541E-09
        1.400 3.3473E-08
        1.600 3.8255E-08
        1.800 1.1505E-07
        2.000 2.5671E-07
        2.200 8.0609E-07
        2.400 2.4414E-06
CONDITIONS:
    temperature: 298
PROPERTIES:
    thermal_dispersion:
      - type: formula A
        coefficients: 4.76e-07 9.72e-09 -3.07e-11 8.22e-07 9.16e-10 0.251
    nd: 1.720467
    Vd: 34.707984
    glass_code: 720347
    density:
      - value: 3190
    thermal_expansion:
      - temperature_range: 243 343
        value: 8.1e-06
      - temperature_range: 293 573
        value: 1e-05
    dPgF: -0.0019
    resistance:
        climatic: 2.0
        acid: 1.0
        phosphate: 1.0