# 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="https://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="https://refractiveindex.info/download/data/2017/ohara_2017-11-30.pdf">OHARA glass data sheets</a>
COMMENTS: |
    Recommended - Lightweight 
DATA:
  - type: formula 2
    wavelength_range: 0.37 2.4
    coefficients: 0 1.87904886 0.014412177 0.369719775 0.063881799 2.33730863 182.66818
  - type: tabulated k
    data: |
        0.370 8.2837E-06
        0.380 3.1746E-06
        0.390 1.5341E-06
        0.400 9.1572E-07
        0.420 4.6545E-07
        0.440 2.6541E-07
        0.460 1.9548E-07
        0.480 1.5195E-07
        0.500 1.1709E-07
        0.550 5.7271E-08
        0.600 5.2812E-08
        0.650 7.8176E-08
        0.700 6.1614E-08
        0.800 1.9127E-08
        0.900 1.4338E-08
        1.000 7.9617E-09
        1.200 9.5541E-09
        1.400 2.2304E-08
        1.600 3.8255E-08
        1.800 1.2950E-07
        2.000 2.2439E-07
        2.200 4.6121E-07
        2.400 8.7937E-07
CONDITIONS:
    temperature: 298
PROPERTIES:
    thermal_dispersion:
      - type: formula A
        coefficients: -4.85e-06 8.97e-09 -3.32e-11 1.13e-06 1.6e-09 0.29
    nd: 1.846660
    Vd: 23.777940
    glass_code: 847238
    density:
      - value: 3540
    thermal_expansion:
      - temperature_range: 243 343
        value: 8.8e-06
      - temperature_range: 293 573
        value: 1.04e-05
    dPgF: 0.0175
    resistance:
        climatic: 1.0
        acid: 1.0
        phosphate: 1.0