# 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: "Improved Transmittance"
DATA:
  - type: formula 3 
    wavelength_range: 0.3 2.4
    coefficients: 3.2498918 -0.010466366 2 0.048000686 -2 0.0031859922 -4 -0.00015447369 -6 2.6258671e-05 -8
  - type: tabulated k
    data: |
        0.360 1.3193E-05
        0.370 4.4581E-06
        0.380 1.6998E-06
        0.390 7.7111E-07
        0.400 4.0691E-07
        0.420 1.5739E-07
        0.440 8.5059E-08
        0.460 5.1610E-08
        0.480 3.4533E-08
        0.500 1.9944E-08
        0.550 8.7623E-09
        0.600 4.7770E-09
        0.650 1.0355E-08
        0.700 5.5732E-09
SPECS:
    n_absolute: false
    wavelength_vacuum: false
    temperature: 25.0 °C
    thermal_dispersion:
      - type: "Schott formula"
        coefficients: 1.722e-05 0.0 0.0 0.0 0.0 0.0
    nd: 1.846658
    Vd: 23.885544
    glass_code: 847239
    glass_status: preferred
    density: 5.53 g/cm<sup>3</sup>
    thermal_expansion:
      - temperature_range: -30 70 °C
        coefficient: 7.8e-06 K<sup>-1</sup>
      - temperature_range: 20 300 °C
        coefficient: 8.7e-06 K<sup>-1</sup>
    dPgF: 0.0134
    acid_resistance: 52.2
    phosphate_resistance: 3.2
