# 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: 2.6481267 -0.011553471 2 0.015517531 -2 0.00053211731 -4 -3.390687e-05 -6 2.099346e-06 -8
  - type: tabulated k
    data: |
        0.330 5.5679E-06
        0.340 2.1010E-06
        0.350 8.7654E-07
        0.360 3.9896E-07
        0.370 2.0104E-07
        0.380 1.1401E-07
        0.390 6.9040E-08
        0.400 4.8108E-08
        0.420 3.3591E-08
        0.440 2.8124E-08
        0.460 2.9402E-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
SPECS:
    n_absolute: false
    wavelength_vacuum: false
    temperature: 25.0 °C
    thermal_dispersion:
      - type: "Schott formula"
        coefficients: -8.24e-07 1.36e-08 1.73e-12 4.66e-07 8.6e-10 0.197
    nd: 1.640998
    Vd: 56.927542
    glass_code: 641569
    glass_status: preferred
    density: 3.7 g/cm<sup>3</sup>
    thermal_expansion:
      - temperature_range: -30 70 °C
        coefficient: 6.7e-06 K<sup>-1</sup>
      - temperature_range: 20 300 °C
        coefficient: 8e-06 K<sup>-1</sup>
    dPgF: -0.0024
    climatic_resistance: 3.0
    acid_resistance: 53.0
    phosphate_resistance: 3.2
