# 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: 0.34 2.4
    coefficients: 0 1.25088944 0.00883921279 0.0997973327 0.0482685052 1.20583504 137.414953
  - type: tabulated k
    data: |
        0.340 1.2460E-05
        0.350 3.4477E-06
        0.360 1.0630E-06
        0.370 4.1004E-07
        0.380 1.7427E-07
        0.390 8.8138E-08
        0.400 5.1341E-08
        0.420 2.6846E-08
        0.440 2.1072E-08
        0.460 1.8349E-08
        0.480 1.5310E-08
        0.500 1.1955E-08
        0.550 8.7623E-09
        0.600 9.5589E-09
        0.650 1.0355E-08
        0.700 1.1152E-08
        0.800 1.2745E-08
        0.900 1.4338E-08
        1.000 2.3909E-08
        1.200 2.8691E-08
        1.400 4.4653E-08
        1.600 8.9440E-08
        1.800 3.3330E-07
        2.000 8.4990E-07
        2.200 2.0402E-06
        2.400 3.1039E-06
CONDITIONS:
    temperature: 298
PROPERTIES:
    thermal_dispersion:
      - type: formula A
        coefficients: -1.21e-06 1.02e-08 -4.37e-11 5.67e-07 5.97e-10 0.265
    nd: 1.548141
    Vd: 45.784277
    glass_code: 548458
    density:
      - value: 2540
    thermal_expansion:
      - temperature_range: 243 343
        value: 8.6e-06
      - temperature_range: 293 573
        value: 1.01e-05
    dPgF: 0.0012
    resistance:
        climatic: 1.0
        acid: 1.0
        phosphate: 1.0