# 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 
DATA:
  - type: formula 2
    wavelength_range: 0.31 2.4
    coefficients: 0 0.927886025 0.00417549199 0.708858526 0.0184691838 1.18610897 122.210416
  - type: tabulated k
    data: |
        0.310 6.2307E-06
        0.320 2.9824E-06
        0.330 1.4762E-06
        0.340 7.7836E-07
        0.350 4.2007E-07
        0.360 2.1098E-07
        0.370 1.1713E-07
        0.380 7.0363E-08
        0.390 4.6905E-08
        0.400 3.1991E-08
        0.420 2.3478E-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 7.8260E-08
        1.600 7.6624E-08
        1.800 2.0195E-07
        2.000 4.3563E-07
        2.200 1.3838E-06
        2.400 3.3299E-06
CONDITIONS:
    temperature: 298
PROPERTIES:
    thermal_dispersion:
      - type: formula A
        coefficients: 3.5e-07 1.22e-08 -3.26e-11 5.94e-07 6.22e-10 0.141
    nd: 1.638539
    Vd: 55.380028
    glass_code: 639554
    density:
      - value: 3690
    thermal_expansion:
      - temperature_range: 243 343
        value: 7e-06
      - temperature_range: 293 573
        value: 8.4e-06
    dPgF: -0.0035
    resistance:
        climatic: 2.0
        acid: 51.2
        phosphate: 2.0