# 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 2 
    wavelength_range: 0.3 2.4
    coefficients: 0 1.734192 0.01110755 0.2314896 0.05153277 1.517096 163.4134
  - type: tabulated k
    data: |
        0.350 5.6824E-06
        0.360 2.3519E-06
        0.370 1.0925E-06
        0.380 6.0010E-07
        0.390 3.6167E-07
        0.400 2.2758E-07
        0.420 1.2254E-07
        0.440 8.1473E-08
        0.460 5.5324E-08
        0.480 3.8389E-08
        0.500 2.3945E-08
        0.550 8.7623E-09
        0.600 9.5589E-09
        0.650 1.0355E-08
        0.700 1.1152E-08
        0.800 1.2745E-08
        0.900 1.4338E-08
        1.000 2.3909E-08
        1.200 3.8274E-08
        1.400 6.7046E-08
        1.600 8.9440E-08
        1.800 1.7293E-07
        2.400 1.3593E-06
SPECS:
    n_absolute: false
    wavelength_vacuum: false
    temperature: 25.0 °C
    thermal_dispersion:
      - type: "Schott formula"
        coefficients: 4.1859e-06 0.0 0.0 0.0 0.0 0.0
    nd: 1.749497
    Vd: 35.278026
    glass_code: 750353
    glass_status: preferred
    density: 4.55 g/cm<sup>3</sup>
    thermal_expansion:
      - temperature_range: -30 70 °C
        coefficient: 8.4e-06 K<sup>-1</sup>
      - temperature_range: 20 300 °C
        coefficient: 9.4e-06 K<sup>-1</sup>
    dPgF: 0.0035
    acid_resistance: 5.2
    phosphate_resistance: 3.0
