# 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: "Low Softening Temperature "
DATA:
  - type: formula 2 
    wavelength_range: 0.37 2.4
    coefficients: 0 1.83464643 0.0134992001 0.415079602 0.0618608854 2.82563492 201.62917
  - type: tabulated k
    data: |
        0.370 7.4367E-06
        0.380 3.4456E-06
        0.390 1.8554E-06
        0.400 1.0902E-06
        0.420 4.6545E-07
        0.440 2.5410E-07
        0.460 1.7238E-07
        0.480 1.2818E-07
        0.500 9.6658E-08
        0.550 4.3988E-08
        0.600 3.8351E-08
        0.650 5.7213E-08
        0.700 4.4743E-08
        0.800 1.9127E-08
        0.900 1.4338E-08
        1.000 1.5931E-08
        1.200 9.5541E-09
        1.400 4.4653E-08
        1.600 7.6624E-08
        1.800 2.0195E-07
        2.000 3.0530E-07
        2.200 7.8777E-07
        2.400 1.3860E-06
SPECS:
    n_absolute: false
    wavelength_vacuum: false
    temperature: 25.0 °C
    thermal_dispersion:
      - type: "Schott formula"
        coefficients: -1.86e-06 8.76e-09 -1.88e-11 1.03e-06 1.4e-09 0.299
    nd: 1.846660
    Vd: 23.773536
    glass_status: special
    density: 3.34 g/cm<sup>3</sup>
    thermal_expansion:
      - temperature_range: -30 70 °C
        coefficient: 8e-06 K<sup>-1</sup>
    dPgF: 0.0168
    climatic_resistance: 3.0
    acid_resistance: 1.0
    phosphate_resistance: 1.0
