# 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: ""
DATA:
  - type: formula 3 
    wavelength_range: 0.365 0.9
    coefficients: 2.567869 -0.008657333 2 0.01659137 -2 0.0002865545 -4 -3.488675e-06 -6 8.927552e-07 -8
  - type: tabulated k
    data: |
        0.370 2.5834E-07
        0.380 1.5829E-07
        0.390 1.0414E-07
        0.400 6.4307E-08
        0.420 3.6968E-08
        0.440 2.8124E-08
        0.460 2.5714E-08
        0.480 1.9146E-08
        0.500 1.1955E-08
        0.550 8.7623E-09
        0.600 1.4345E-08
        0.650 2.0732E-08
        0.700 1.6736E-08
SPECS:
    n_absolute: false
    wavelength_vacuum: false
    temperature: 25.0 °C
    thermal_dispersion:
      - type: "Schott formula"
        coefficients: 2.3634e-06 0.0 0.0 0.0 0.0 0.0
    nd: 1.617196
    Vd: 54.040511
    glass_code: 617540
    glass_status: preferred
    density: 3.63 g/cm<sup>3</sup>
    thermal_expansion:
      - temperature_range: -30 70 °C
        coefficient: 6.3e-06 K<sup>-1</sup>
      - temperature_range: 20 300 °C
        coefficient: 7.3e-06 K<sup>-1</sup>
    dPgF: -0.0026
