# 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: 2.6413378 -0.012997513 2 0.02125189 -2 0.00074166905 -4 -1.9814508e-05 -6 3.0698879e-06 -8
  - type: tabulated k
    data: |
        0.320 1.1727E-05
        0.330 6.0467E-06
        0.340 3.7508E-06
        0.350 2.2866E-06
        0.360 1.3695E-06
        0.370 8.0804E-07
        0.380 4.9145E-07
        0.390 2.8248E-07
        0.400 1.6327E-07
        0.420 6.0709E-08
        0.440 3.5190E-08
        0.460 1.8349E-08
        0.480 1.1476E-08
        0.500 7.9657E-09
        0.550 8.7623E-09
        0.600 1.4345E-08
        0.650 1.0355E-08
        0.700 1.1152E-08
SPECS:
    n_absolute: false
    wavelength_vacuum: false
    temperature: 25.0 °C
    thermal_dispersion:
      - type: "Schott formula"
        coefficients: 9.051e-06 0.0 0.0 0.0 0.0 0.0
    nd: 1.644496
    Vd: 40.817749
    glass_code: 645408
    glass_status: preferred
    density: 3.46 g/cm<sup>3</sup>
    thermal_expansion:
      - temperature_range: -30 70 °C
        coefficient: 4.8e-06 K<sup>-1</sup>
      - temperature_range: 20 300 °C
        coefficient: 6.2e-06 K<sup>-1</sup>
    dPgF: -0.0067
    acid_resistance: 52.1
    phosphate_resistance: 4.2
