# 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 1.62224674 0.0118368386 0.293844589 0.0590208025 1.99225164 171.959976
  - type: tabulated k
    data: |
        0.370 7.4367E-06
        0.380 2.9259E-06
        0.390 1.3851E-06
        0.400 7.1029E-07
        0.420 2.7505E-07
        0.440 1.5389E-07
        0.460 1.1150E-07
        0.480 8.4972E-08
        0.500 6.4177E-08
        0.550 3.0745E-08
        0.600 3.3540E-08
        0.650 4.6764E-08
        0.700 3.3523E-08
        0.800 1.9127E-08
        0.900 1.4338E-08
        1.000 2.3909E-08
        1.200 1.9118E-08
        1.400 6.7046E-08
        1.600 8.9440E-08
        1.800 2.4560E-07
        2.000 4.1928E-07
        2.200 1.0089E-06
        2.400 1.5925E-06
CONDITIONS:
    temperature: 298
PROPERTIES:
    thermal_dispersion:
      - type: formula A
        coefficients: -1.65e-06 1.1e-08 -3.44e-11 8.43e-07 1.07e-09 0.3
    nd: 1.740769
    Vd: 27.789359
    glass_code: 741278
    density:
      - value: 3100
    thermal_expansion:
      - temperature_range: 243 343
        value: 8.3e-06
      - temperature_range: 293 573
        value: 9.6e-06
    dPgF: 0.013
    resistance:
        climatic: 1.0
        acid: 1.0
        phosphate: 1.0