# 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: |
    
DATA:
  - type: formula 3
    wavelength_range: 0.3 2.4
    coefficients: 3.0523317 -0.010699896 2 0.040026761 -2 0.0027411266 -4 -0.00016825655 -6 2.453957e-05 -8
  - type: tabulated k
    data: |
        0.380 8.0415E-06
        0.390 3.1707E-06
        0.400 1.3712E-06
        0.420 3.8949E-07
        0.440 1.6122E-07
        0.460 8.8925E-08
        0.480 5.3854E-08
        0.500 3.1959E-08
        0.550 1.7542E-08
        0.600 1.9137E-08
        0.650 3.1129E-08
        0.700 2.2326E-08
CONDITIONS:
    temperature: 298
PROPERTIES:
    nd: 1.784718
    Vd: 25.712726
    glass_code: 785257
    glass_status: preferred
    density:
      - value: 4790
    thermal_expansion:
      - temperature_range: 243 343
        value: 7.4e-06
      - temperature_range: 293 573
        value: 8.4e-06
    dPgF: 0.0129
    resistance:
        acid: 1.2
        phosphate: 1.2