# 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 "
DATA:
  - type: formula 2 
    wavelength_range: 0.36 2.4
    coefficients: 0 1.98280031 0.0118987456 0.31675845 0.0527156001 2.44472646 213.220697
  - type: tabulated k
    data: |
        0.360 1.3193E-05
        0.370 6.4990E-06
        0.380 3.7433E-06
        0.390 2.2139E-06
        0.400 1.3712E-06
        0.420 6.2276E-07
        0.440 3.1870E-07
        0.460 2.0708E-07
        0.480 1.4401E-07
        0.500 9.6658E-08
        0.550 3.5155E-08
        0.600 2.3933E-08
        0.650 2.5928E-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 1.1146E-08
        1.600 2.5490E-08
        1.800 1.0062E-07
        2.000 1.7604E-07
        2.200 3.1800E-07
        2.400 8.5939E-07
SPECS:
    n_absolute: false
    wavelength_vacuum: false
    temperature: 25.0 °C
    thermal_dispersion:
      - type: "Schott formula"
        coefficients: -3.71e-07 9.01e-09 -2.99e-11 9.14e-07 1.11e-09 0.257
    nd: 1.850259
    Vd: 32.270120
    glass_code: 850323
    density: 4.36 g/cm<sup>3</sup>
    thermal_expansion:
      - temperature_range: -30 70 °C
        coefficient: 7.7e-06 K<sup>-1</sup>
      - temperature_range: 20 300 °C
        coefficient: 9.1e-06 K<sup>-1</sup>
    dPgF: 0.0036
    climatic_resistance: 2.0
    acid_resistance: 2.0
    phosphate_resistance: 1.0
