# 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 1.66755531 0.0122052137 0.294411865 0.0597775329 2.49422119 214.869618
  - type: tabulated k
    data: |
        0.370 6.2428E-06
        0.380 2.4146E-06
        0.390 1.1069E-06
        0.400 6.3169E-07
        0.420 2.4615E-07
        0.440 1.3565E-07
        0.460 1.0019E-07
        0.480 7.7169E-08
        0.500 5.6098E-08
        0.550 2.1939E-08
        0.600 2.8734E-08
        0.650 3.6335E-08
        0.700 2.7922E-08
        0.800 6.3694E-09
        0.900 7.1656E-09
        1.000 7.9617E-09
        1.200 2.8691E-08
        1.400 5.5844E-08
        1.600 7.6624E-08
        1.800 1.8743E-07
        2.000 3.0530E-07
        2.200 6.9645E-07
        2.400 1.1411E-06
CONDITIONS:
    temperature: 298
PROPERTIES:
    thermal_dispersion:
      - type: formula A
        coefficients: -2.51e-06 1.06e-08 -3.89e-11 8.33e-07 1.27e-09 0.305
    nd: 1.755199
    Vd: 27.512089
    glass_code: 755275
    density:
      - value: 3150
    thermal_expansion:
      - temperature_range: 243 343
        value: 8.5e-06
      - temperature_range: 293 573
        value: 1e-05
    dPgF: 0.0133
    resistance:
        climatic: 1.0
        acid: 1.0
        phosphate: 1.0