# 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 2
    wavelength_range: 0.33 2.4
    coefficients: 0 1.95615766 0.00979338965 0.319216215 0.0376836296 1.39173189 94.8775271
  - type: tabulated k
    data: |
        0.320 1.1727E-05
        0.330 4.5032E-06
        0.340 2.2213E-06
        0.350 1.1998E-06
        0.360 7.1179E-07
        0.370 4.4408E-07
        0.380 2.7524E-07
        0.390 1.8873E-07
        0.400 1.3658E-07
        0.420 8.8048E-08
        0.440 6.3599E-08
        0.460 4.4192E-08
        0.480 3.4533E-08
        0.500 2.3945E-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 7.9617E-09
        1.200 9.5541E-09
        1.400 4.4653E-08
        1.600 7.6624E-08
        1.800 2.1649E-07
        2.000 6.1658E-07
        2.200 2.0402E-06
        2.400 7.3656E-06
CONDITIONS:
    temperature: 298
PROPERTIES:
    thermal_dispersion:
      - type: formula A
        coefficients: 2.4e-06 1.26e-08 -2.98e-11 6.81e-07 8.19e-10 0.211
    nd: 1.834807
    Vd: 42.713673
    glass_code: 835427
    glass_status: preferred
    density:
      - value: 4730
    thermal_expansion:
      - temperature_range: 243 343
        value: 6.2e-06
      - temperature_range: 293 573
        value: 7.6e-06
    dPgF: -0.0082
    resistance:
        acid: 4.0
        phosphate: 1.0