# 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: 0.3 2.4
    coefficients: 0 2.56597628 0.0205164012 0.526892298 0.0831737967 1.27957402 109.78774
  - type: tabulated k
    data: |
        0.420 1.5392E-05
        0.440 2.3577E-06
        0.460 5.5210E-07
        0.480 2.0398E-07
        0.500 1.1709E-07
        0.550 7.0594E-08
        0.600 9.6461E-08
        0.650 1.2036E-07
        0.700 1.2392E-07
        0.800 1.0916E-07
        0.900 8.6463E-08
        1.000 7.1944E-08
        1.200 4.7866E-08
        1.400 5.5844E-08
        1.600 8.9440E-08
        1.800 1.8743E-07
        2.000 4.0295E-07
        2.200 9.9038E-07
        2.400 2.6597E-06
CONDITIONS:
    temperature: 298
PROPERTIES:
    nd: 2.101949
    Vd: 16.785097
    glass_status: preferred
    density:
      - value: 6570
    thermal_expansion:
      - temperature_range: 243 343
        value: 1.07e-05
    dPgF: 0.0578
    resistance:
        climatic: 3.0
        acid: 53.2
        phosphate: 2.2