# 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 1.77227611 0.0131182633 0.34569125 0.0614479619 2.40788501 200.753254
  - type: tabulated k
    data: |
        0.370 6.2428E-06
        0.380 2.2195E-06
        0.390 1.1069E-06
        0.400 6.3169E-07
        0.420 2.8232E-07
        0.440 1.6122E-07
        0.460 1.1150E-07
        0.480 8.4972E-08
        0.500 6.4177E-08
        0.550 3.0745E-08
        0.600 2.3933E-08
        0.650 3.1129E-08
        0.700 2.2326E-08
        0.800 1.2745E-08
        0.900 1.4338E-08
        1.000 1.5931E-08
        1.200 1.9118E-08
        1.400 3.3473E-08
        1.600 6.3822E-08
        1.800 2.0195E-07
        2.000 3.5405E-07
        2.200 7.5118E-07
        2.400 1.4271E-06
CONDITIONS:
    temperature: 298
PROPERTIES:
    thermal_dispersion:
      - type: formula A
        coefficients: -4.43e-06 1.06e-08 -3.14e-11 9.45e-07 1.14e-09 0.303
    nd: 1.805181
    Vd: 25.425363
    glass_code: 805254
    density:
      - value: 3370
    thermal_expansion:
      - temperature_range: 243 343
        value: 8.9e-06
      - temperature_range: 293 573
        value: 1.07e-05
    dPgF: 0.0158
    resistance:
        climatic: 1.0
        acid: 1.0
        phosphate: 1.0