# 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: "Recommended - Lightweight "
DATA:
  - type: formula 2 
    wavelength_range: 0.35 2.4
    coefficients: 0 1.31433154 0.00950404477 0.112300168 0.0524112772 1.413901 148.429972
  - type: tabulated k
    data: |
        0.350 8.3437E-06
        0.360 2.3519E-06
        0.370 7.3156E-07
        0.380 2.7524E-07
        0.390 1.2346E-07
        0.400 6.7557E-08
        0.420 3.3591E-08
        0.440 2.4596E-08
        0.460 2.2030E-08
        0.480 1.9146E-08
        0.500 1.5947E-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
        1.000 1.5931E-08
        1.200 1.9118E-08
        1.400 6.7046E-08
        1.600 8.9440E-08
        1.800 3.1864E-07
        2.000 7.3281E-07
        2.200 2.0402E-06
        2.400 2.6597E-06
SPECS:
    n_absolute: false
    wavelength_vacuum: false
    temperature: 25.0 °C
    thermal_dispersion:
      - type: "Schott formula"
        coefficients: 1.72e-06 1.09e-08 -4.25e-11 5.94e-07 5.57e-10 0.276
    nd: 1.575006
    Vd: 41.505207
    glass_code: 575415
    density: 2.58 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: 8.9e-06 K<sup>-1</sup>
    dPgF: 0.0024
    climatic_resistance: 2.0
    acid_resistance: 1.0
    phosphate_resistance: 1.0
