# 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=\"http://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=\"http://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: 0.34 0.7
    coefficients: 0 1.87409991 0.00993318344 0.297921402 0.0405501825 1.35064285 100.5022
  - type: tabulated k
    data: |
        0.340 5.5201E-06
        0.350 2.0443E-06
        0.360 1.0218E-06
        0.370 5.1336E-07
        0.380 2.9184E-07
        0.390 1.9203E-07
        0.400 1.3326E-07
        0.420 8.1192E-08
        0.440 6.0036E-08
        0.460 4.4192E-08
        0.480 3.4533E-08
        0.500 1.9944E-08
        0.550 8.7623E-09
        0.600 9.5589E-09
        0.650 5.1751E-09
        0.700 5.5732E-09
SPECS:
    n_absolute: false
    wavelength_vacuum: false
    temperature: 25.0 °C
    thermal_dispersion:
      - type: "Schott formula"
        coefficients: 7.31e-06 1.04e-08 -8.93e-12 7.66e-07 7.96e-10 0.229
    nd: 1.806249
    Vd: 40.907302
    glass_code: 806409
    density: 4.49 g/cm<sup>3</sup>
    thermal_expansion:
      - temperature_range: -30 70 °C
        coefficient: 5.9e-06 K<sup>-1</sup>
      - temperature_range: 20 300 °C
        coefficient: 7.2e-06 K<sup>-1</sup>
    dPgF: -0.0065
    climatic_resistance: 1.0
    acid_resistance: 51.2
    phosphate_resistance: 2.0
