# 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 3 
    wavelength_range: 0.3 2.4
    coefficients: 2.279329 -0.010732907 2 0.012001392 -2 0.00058141137 -4 -4.6205948e-05 -6 2.9557679e-06 -8
  - type: tabulated k
    data: |
        0.300 8.3713E-06
        0.310 4.6800E-06
        0.320 2.7472E-06
        0.330 1.6672E-06
        0.340 1.0435E-06
        0.350 6.2150E-07
        0.360 3.9896E-07
        0.370 2.4231E-07
        0.380 1.7107E-07
        0.390 1.1057E-07
        0.400 7.0810E-08
        0.420 3.3591E-08
        0.440 3.1655E-08
        0.460 2.2030E-08
        0.480 1.5310E-08
        0.500 1.1955E-08
        0.550 8.7623E-09
        0.600 9.5589E-09
        0.650 1.5541E-08
        0.700 1.1152E-08
        0.800 6.3694E-09
        0.900 7.1656E-09
SPECS:
    n_absolute: false
    wavelength_vacuum: false
    temperature: 25.0 °C
    thermal_dispersion:
      - type: "Schott formula"
        coefficients: 7.208e-06 0.0 0.0 0.0 0.0 0.0
    nd: 1.521299
    Vd: 52.553447
    glass_code: 521526
    glass_status: preferred
    density: 2.51 g/cm<sup>3</sup>
    thermal_expansion:
      - temperature_range: -30 70 °C
        coefficient: 5.3e-06 K<sup>-1</sup>
      - temperature_range: 20 300 °C
        coefficient: 5.9e-06 K<sup>-1</sup>
    dPgF: -0.0072
    acid_resistance: 2.1
    phosphate_resistance: 2.0
