# 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: |
    Low Softening Temperature
DATA:
  - type: formula 2
    wavelength_range: 0.37 2.4
    coefficients: 0 2.00722652 0.0135705124 0.442086773 0.0591808873 3.37287426 219.832665
  - type: tabulated k
    data: |
        0.370 7.8298E-06
        0.380 4.3155E-06
        0.390 2.7671E-06
        0.400 1.8456E-06
        0.420 9.1724E-07
        0.440 5.2809E-07
        0.460 3.2117E-07
        0.480 2.2418E-07
        0.500 1.6243E-07
        0.550 6.6149E-08
        0.600 3.3540E-08
        0.650 3.1129E-08
        0.700 2.2326E-08
        0.800 1.2745E-08
        0.900 1.4338E-08
        1.000 7.9617E-09
        1.200 9.5541E-09
        1.400 2.2304E-08
        1.600 3.8255E-08
        1.800 8.6203E-08
        2.000 1.7604E-07
        2.200 4.2529E-07
        2.400 9.7963E-07
CONDITIONS:
    temperature: 298
PROPERTIES:
    thermal_dispersion:
      - type: formula A
        coefficients: 3.5e-07 6.74e-09 -1.38e-11 1.01e-06 1.37e-09 0.298
    nd: 1.902000
    Vd: 25.101413
    glass_code: 902251
    glass_status: special
    density:
      - value: 3640
    thermal_expansion:
      - temperature_range: 243 343
        value: 8.1e-06
      - temperature_range: 293 573
        value: 9.9e-06
    dPgF: 0.0108
    resistance:
        climatic: 4.0
        acid: 2.0
        phosphate: 1.0