# 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 2.4
    coefficients: 0 1.89927344 0.0102901828 0.270978866 0.0424227173 1.33163819 100.967566
  - type: tabulated k
    data: |
        0.340 6.5150E-06
        0.350 2.7692E-06
        0.360 1.2341E-06
        0.370 6.2044E-07
        0.380 3.5239E-07
        0.390 2.1856E-07
        0.400 1.4990E-07
        0.420 8.8048E-08
        0.440 6.3599E-08
        0.460 4.7899E-08
        0.480 3.4533E-08
        0.500 2.3945E-08
        0.550 1.3150E-08
        0.600 1.4345E-08
        0.650 1.0355E-08
        0.700 1.1152E-08
        0.800 6.3694E-09
        0.900 7.1656E-09
        1.000 7.9617E-09
        1.200 1.9118E-08
        1.400 5.5844E-08
        1.600 8.9440E-08
        1.800 2.1649E-07
        2.000 5.5054E-07
        2.200 1.6511E-06
        2.400 6.2740E-06
SPECS:
    n_absolute: false
    wavelength_vacuum: false
    temperature: 25.0 °C
    thermal_dispersion:
      - type: "Schott formula"
        coefficients: 7.78e-06 1.14e-08 -1.69e-11 7.56e-07 7.92e-10 0.241
    nd: 1.806100
    Vd: 40.400738
    glass_code: 806404
    glass_status: special
    density: 4.53 g/cm<sup>3</sup>
    thermal_expansion:
      - temperature_range: -30 70 °C
        coefficient: 5.8e-06 K<sup>-1</sup>
      - temperature_range: 20 300 °C
        coefficient: 7.3e-06 K<sup>-1</sup>
    dPgF: -0.0057
    climatic_resistance: 2.0
    acid_resistance: 51.2
    phosphate_resistance: 1.2
