# 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: 2.961379 -0.0098262329 2 0.036779565 -2 0.0020712902 -4 -9.3348652e-05 -6 1.5491439e-05 -8
  - type: tabulated k
    data: |
        0.350 7.8359E-06
        0.360 2.9268E-06
        0.370 1.2234E-06
        0.380 5.6345E-07
        0.390 3.0637E-07
        0.400 1.7670E-07
        0.420 7.4350E-08
        0.440 4.2271E-08
        0.460 2.9402E-08
        0.480 1.9146E-08
        0.500 1.1955E-08
        0.550 8.7623E-09
        0.600 9.5589E-09
        0.650 1.0355E-08
        0.700 1.1152E-08
        0.800 6.3694E-09
        0.900 7.1656E-09
SPECS:
    n_absolute: false
    wavelength_vacuum: false
    temperature: 25.0 °C
    thermal_dispersion:
      - type: "Schott formula"
        coefficients: 1.208e-05 0.0 0.0 0.0 0.0 0.0
    nd: 1.755199
    Vd: 27.512146
    glass_code: 755275
    glass_status: preferred
    density: 4.78 g/cm<sup>3</sup>
    thermal_expansion:
      - temperature_range: -30 70 °C
        coefficient: 7.9e-06 K<sup>-1</sup>
      - temperature_range: 20 300 °C
        coefficient: 8.9e-06 K<sup>-1</sup>
    dPgF: 0.0074
    acid_resistance: 4.2
    phosphate_resistance: 1.0
