# 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: "Recommended "
DATA:
  - type: formula 2 
    wavelength_range: 0.35 2.4
    coefficients: 0 1.50161605 0.00940761826 0.126987445 0.0472602195 1.43544052 141.666499
  - type: tabulated k
    data: |
        0.350 5.6824E-06
        0.360 2.0436E-06
        0.370 8.4704E-07
        0.380 4.2112E-07
        0.390 2.3191E-07
        0.400 1.4656E-07
        0.420 7.7770E-08
        0.440 6.0036E-08
        0.460 4.7899E-08
        0.480 3.8389E-08
        0.500 2.7950E-08
        0.550 1.3150E-08
        0.600 1.9137E-08
        0.650 2.0732E-08
        0.700 1.6736E-08
        0.800 1.2745E-08
        0.900 1.4338E-08
        1.000 1.5931E-08
        1.200 1.9118E-08
        1.400 8.9485E-08
        1.600 6.3822E-08
        1.800 1.8743E-07
        2.000 3.8663E-07
        2.200 1.2329E-06
        2.400 2.8805E-06
SPECS:
    n_absolute: false
    wavelength_vacuum: false
    temperature: 25.0 °C
    thermal_dispersion:
      - type: "Schott formula"
        coefficients: 1.32e-06 1.09e-08 -4.03e-11 4.22e-07 5.3e-10 0.301
    nd: 1.639300
    Vd: 44.872804
    glass_code: 639449
    density: 3.18 g/cm<sup>3</sup>
    thermal_expansion:
      - temperature_range: -30 70 °C
        coefficient: 7.6e-06 K<sup>-1</sup>
      - temperature_range: 20 300 °C
        coefficient: 9.1e-06 K<sup>-1</sup>
    dPgF: -0.0006
    climatic_resistance: 2.0
    acid_resistance: 3.2
    phosphate_resistance: 1.0
