# 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: 2.8593245 -0.010210027 2 0.031973162 -2 0.0020206869 -4 -0.00011399314 -6 1.4012932e-05 -8
  - type: tabulated k
    data: |
        0.340 1.0585E-05
        0.350 4.0934E-06
        0.360 1.8734E-06
        0.370 1.0084E-06
        0.380 6.0010E-07
        0.390 3.6167E-07
        0.400 2.1053E-07
        0.420 9.4918E-08
        0.440 5.6476E-08
        0.460 4.0489E-08
        0.480 2.6832E-08
        0.500 1.9944E-08
        0.550 8.7623E-09
        0.600 1.4345E-08
        0.650 2.0732E-08
        0.700 1.6736E-08
        0.800 6.3694E-09
        0.900 7.1656E-09
        1.000 7.9617E-09
SPECS:
    n_absolute: false
    wavelength_vacuum: false
    temperature: 25.0 °C
    thermal_dispersion:
      - type: "Schott formula"
        coefficients: 1.07e-05 0.0 0.0 0.0 0.0 0.0
    nd: 1.721506
    Vd: 29.243262
    glass_code: 722292
    glass_status: preferred
    density: 4.5 g/cm<sup>3</sup>
    thermal_expansion:
      - temperature_range: -30 70 °C
        coefficient: 8.3e-06 K<sup>-1</sup>
      - temperature_range: 20 300 °C
        coefficient: 9.4e-06 K<sup>-1</sup>
    dPgF: 0.0046
    acid_resistance: 3.2
    phosphate_resistance: 2.2
