# 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 XMT at 370-420 "
DATA:
  - type: formula 2 
    wavelength_range: 0.36 2.4
    coefficients: 0 1.85484904 0.0134621486 0.396194484 0.0631945361 2.43512461 170.864886
  - type: tabulated k
    data: |
        0.360 8.5821E-06
        0.370 3.1764E-06
        0.380 1.3972E-06
        0.390 8.1115E-07
        0.400 5.1731E-07
        0.420 3.0055E-07
        0.440 2.1665E-07
        0.460 1.7622E-07
        0.480 1.4798E-07
        0.500 1.1709E-07
        0.550 5.2839E-08
        0.600 2.8734E-08
        0.650 2.0732E-08
        0.700 1.6736E-08
        0.800 1.2745E-08
        0.900 7.1656E-09
        1.000 7.9617E-09
        1.200 9.5541E-09
        1.400 2.2304E-08
        1.600 6.3822E-08
        1.800 2.0195E-07
        2.000 3.8663E-07
        2.200 8.6118E-07
        2.400 1.4477E-06
SPECS:
    n_absolute: false
    wavelength_vacuum: false
    temperature: 25.0 °C
    thermal_dispersion:
      - type: "Schott formula"
        coefficients: -4.85e-06 9.27e-09 -2.86e-11 9.57e-07 1.4e-09 0.304
    nd: 1.846660
    Vd: 23.883950
    glass_code: 847239
    density: 3.78 g/cm<sup>3</sup>
    thermal_expansion:
      - temperature_range: -30 70 °C
        coefficient: 7.4e-06 K<sup>-1</sup>
      - temperature_range: 20 300 °C
        coefficient: 9e-06 K<sup>-1</sup>
    dPgF: 0.019
    climatic_resistance: 1.0
    acid_resistance: 2.3
    phosphate_resistance: 1.0
