# 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: 2.7137156 -0.0093481462 2 0.022190744 -2 0.00074154999 -4 -2.1872211e-05 -6 3.821015e-06 -8
  - type: tabulated k
    data: |
        0.350 9.7665E-06
        0.360 3.8591E-06
        0.370 1.7603E-06
        0.380 8.6993E-07
        0.390 4.6808E-07
        0.400 2.5850E-07
        0.420 1.1561E-07
        0.440 7.7891E-08
        0.460 5.5324E-08
        0.480 4.2250E-08
        0.500 2.7950E-08
        0.550 1.7542E-08
        0.600 2.3933E-08
        0.650 3.1129E-08
        0.700 2.2326E-08
        0.800 1.9127E-08
        0.900 2.1518E-08
SPECS:
    n_absolute: false
    wavelength_vacuum: false
    temperature: 25.0 °C
    thermal_dispersion:
      - type: "Schott formula"
        coefficients: 4.645e-06 0.0 0.0 0.0 0.0 0.0
    nd: 1.667551
    Vd: 41.927521
    glass_code: 668419
    glass_status: preferred
    density: 3.8 g/cm<sup>3</sup>
    thermal_expansion:
      - temperature_range: -30 70 °C
        coefficient: 7.5e-06 K<sup>-1</sup>
      - temperature_range: 20 300 °C
        coefficient: 8.8e-06 K<sup>-1</sup>
    dPgF: 0.0011
    acid_resistance: 51.2
    phosphate_resistance: 2.2
