# 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: 0.365 2.325
    coefficients: 0 2.11102709 0.0120714135 0.370368094 0.0532464416 1.62687484 109.166396
  - type: tabulated k
    data: |
        0.360 8.5821E-06
        0.370 3.7481E-06
        0.380 1.8078E-06
        0.390 1.0195E-06
        0.400 6.3169E-07
        0.420 3.1889E-07
        0.440 1.9808E-07
        0.460 1.3801E-07
        0.480 9.6707E-08
        0.500 7.2272E-08
        0.550 3.0745E-08
        0.600 1.9137E-08
        0.650 1.5541E-08
        0.700 5.5732E-09
        0.800 6.3694E-09
        0.900 7.1656E-09
        1.000 7.9617E-09
        1.200 9.5541E-09
        1.400 1.1146E-08
        1.600 2.5490E-08
        1.800 1.1505E-07
        2.000 4.1928E-07
        2.200 1.4598E-06
        2.400 5.7249E-06
SPECS:
    n_absolute: false
    wavelength_vacuum: false
    temperature: 25.0 °C
    thermal_dispersion:
      - type: "Schott formula"
        coefficients: 2.69e-06 1.07e-08 -9.48e-12 8.91e-07 1.11e-09 0.274
    nd: 1.902699
    Vd: 31.005320
    density: 4.9 g/cm<sup>3</sup>
    thermal_expansion:
      - temperature_range: -30 70 °C
        coefficient: 6.1e-06 K<sup>-1</sup>
    dPgF: 0.003
    climatic_resistance: 3.0
    acid_resistance: 4.2
    phosphate_resistance: 2.0
