# 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 - Lightweight "
DATA:
  - type: formula 2 
    wavelength_range: 0.35 2.4
    coefficients: 0 1.32122534 0.00952091436 0.123824976 0.0516062665 1.43685254 149.064883
  - type: tabulated k
    data: |
        0.350 1.2826E-05
        0.360 3.6468E-06
        0.370 1.2684E-06
        0.380 4.9145E-07
        0.390 2.2856E-07
        0.400 1.1671E-07
        0.420 4.7122E-08
        0.440 3.1655E-08
        0.460 2.5714E-08
        0.480 2.2987E-08
        0.500 1.9944E-08
        0.550 8.7623E-09
        0.600 9.5589E-09
        0.650 1.5541E-08
        0.700 1.1152E-08
        0.800 6.3694E-09
        0.900 7.1656E-09
        1.000 1.5931E-08
        1.200 1.9118E-08
        1.400 6.7046E-08
        1.600 7.6624E-08
        1.800 2.7477E-07
        2.000 6.0004E-07
        2.200 1.6319E-06
        2.400 2.2256E-06
SPECS:
    n_absolute: false
    wavelength_vacuum: false
    temperature: 25.0 °C
    thermal_dispersion:
      - type: "Schott formula"
        coefficients: 2.03e-06 1.32e-08 -4.09e-11 6.01e-07 5.93e-10 0.278
    nd: 1.581439
    Vd: 40.747566
    glass_code: 581407
    density: 2.59 g/cm<sup>3</sup>
    thermal_expansion:
      - temperature_range: -30 70 °C
        coefficient: 7.4e-06 K<sup>-1</sup>
      - temperature_range: 20 300 °C
        coefficient: 8.8e-06 K<sup>-1</sup>
    dPgF: 0.0019
    climatic_resistance: 1.0
    acid_resistance: 1.0
    phosphate_resistance: 1.0
