# 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: 2.6446959 -0.0094397093 2 0.018905035 -2 0.00050396096 -4 -6.9325864e-06 -6 1.5474561e-06 -8
  - type: tabulated k
    data: |
        0.330 8.4529E-06
        0.340 3.3492E-06
        0.350 1.5656E-06
        0.360 7.8620E-07
        0.370 4.4408E-07
        0.380 2.5872E-07
        0.390 1.6573E-07
        0.400 1.0681E-07
        0.420 5.7307E-08
        0.440 4.2271E-08
        0.460 3.3094E-08
        0.480 2.2987E-08
        0.500 1.5947E-08
        0.550 1.3150E-08
        0.600 1.9137E-08
        0.650 2.0732E-08
        0.700 1.6736E-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: 4.07e-06 0.0 0.0 0.0 0.0 0.0
    nd: 1.643279
    Vd: 47.850606
    glass_code: 643479
    glass_status: preferred
    density: 3.85 g/cm<sup>3</sup>
    thermal_expansion:
      - temperature_range: -30 70 °C
        coefficient: 6.9e-06 K<sup>-1</sup>
      - temperature_range: 20 300 °C
        coefficient: 8e-06 K<sup>-1</sup>
    acid_resistance: 52.2
    phosphate_resistance: 3.2
