# 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 2 
    wavelength_range: 0.3 2.4
    coefficients: 0 1.53415 0.008014497 0.2744946 0.03023701 1.210527 118.7442
  - type: tabulated k
    data: |
        0.330 1.0273E-05
        0.340 3.9764E-06
        0.350 1.6651E-06
        0.360 7.4875E-07
        0.370 4.1004E-07
        0.380 2.0971E-07
        0.390 1.2993E-07
        0.400 8.7125E-08
        0.420 4.7122E-08
        0.440 3.5190E-08
        0.460 2.5714E-08
        0.480 1.9146E-08
        0.500 1.1955E-08
        0.550 4.3790E-09
        0.600 9.5589E-09
        0.650 1.0355E-08
        0.700 5.5732E-09
        0.800 6.3694E-09
        0.900 1.4338E-08
        1.000 1.5931E-08
        1.200 1.9118E-08
        1.400 4.4653E-08
        1.600 6.3822E-08
        1.800 1.8743E-07
        2.400 4.2617E-06
SPECS:
    n_absolute: false
    wavelength_vacuum: false
    temperature: 25.0 °C
    thermal_dispersion:
      - type: "Schott formula"
        coefficients: -1.2389e-06 0.0 0.0 0.0 0.0 0.0
    nd: 1.693495
    Vd: 50.807634
    glass_code: 694508
    glass_status: preferred
    density: 4.11 g/cm<sup>3</sup>
    thermal_expansion:
      - temperature_range: -30 70 °C
        coefficient: 7.8e-06 K<sup>-1</sup>
      - temperature_range: 20 300 °C
        coefficient: 9.1e-06 K<sup>-1</sup>
    dPgF: -0.0036
    acid_resistance: 53.2
    phosphate_resistance: 4.2
