# 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: 0.34 2.4
    coefficients: 0 1.17701777 0.00771087686 0.12795803 0.0411325328 1.34740124 154.531692
  - type: tabulated k
    data: |
        0.340 7.1950E-06
        0.350 2.2866E-06
        0.360 8.6260E-07
        0.370 3.7639E-07
        0.380 1.6148E-07
        0.390 8.4947E-08
        0.400 4.8108E-08
        0.420 3.3591E-08
        0.440 3.8729E-08
        0.460 3.6790E-08
        0.480 3.4533E-08
        0.500 2.7950E-08
        0.550 2.6340E-08
        0.600 2.8734E-08
        0.650 4.1547E-08
        0.700 2.2326E-08
        0.800 1.2745E-08
        0.900 2.1518E-08
        1.000 2.3909E-08
        1.200 3.8274E-08
        1.400 5.5844E-08
        1.600 8.9440E-08
        1.800 3.3330E-07
        2.000 8.6670E-07
        2.200 2.0402E-06
        2.400 3.1039E-06
SPECS:
    n_absolute: false
    wavelength_vacuum: false
    temperature: 25.0 °C
    thermal_dispersion:
      - type: "Schott formula"
        coefficients: -4.53e-07 1.01e-08 -3.81e-11 4.89e-07 4.59e-10 0.277
    nd: 1.531717
    Vd: 48.840718
    glass_code: 532489
    density: 2.5 g/cm<sup>3</sup>
    thermal_expansion:
      - temperature_range: -30 70 °C
        coefficient: 9.6e-06 K<sup>-1</sup>
      - temperature_range: 20 300 °C
        coefficient: 9.6e-06 K<sup>-1</sup>
    dPgF: 0.0007
    climatic_resistance: 2.0
    acid_resistance: 1.0
    phosphate_resistance: 1.0
