# 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/2022/CDGM-ZEMAX202206new.AGF">CDGM Zemax catalog 2022-06</a> (obtained from <a href="http://www.cdgmgd.com/go.htm?k=Download&url=downList">http://www.cdgmgd.com</a>)<br>See also <a href="https://refractiveindex.info/download/data/2022/CDGM202206.pdf">CDGM optical glass data sheets</a>
COMMENTS: |
    anneal rate:25°C/h
DATA:
  - type: formula 2
    wavelength_range: 0.302 2.325
    coefficients: 0 0.860621496 0.0142471941 0.723408663 0.00293226364 0.91527878 109.074599
  - type: tabulated k
    data: |
        0.300 8.3713E-06
        0.310 6.9404E-06
        0.320 4.6666E-06
        0.330 3.0756E-06
        0.340 1.7177E-06
        0.350 9.5391E-07
        0.360 5.0290E-07
        0.370 2.6155E-07
        0.380 1.3923E-07
        0.390 8.4947E-08
        0.400 5.4578E-08
        0.420 3.6968E-08
        0.440 3.5190E-08
        0.460 2.5714E-08
        0.480 2.2987E-08
        0.500 1.9944E-08
        0.550 1.7542E-08
        0.600 1.9137E-08
        0.650 2.5928E-08
        0.700 1.6736E-08
        0.800 1.9127E-08
        0.850 1.3542E-08
        0.900 1.4338E-08
        0.950 1.5135E-08
        1.000 1.5931E-08
        1.060 1.6887E-08
        1.200 1.9118E-08
        1.400 2.2304E-08
        1.600 6.3822E-08
        1.800 2.1649E-07
        2.000 4.5199E-07
        2.200 1.0460E-06
        2.400 1.7383E-06
CONDITIONS:
    temperature: 293
PROPERTIES:
    thermal_dispersion:
      - type: formula A
        coefficients: -1.27e-05 7.36e-09 -1.75e-13 4.58e-07 2.54e-10 0.183
    nd: 1.619990
    Vd: 63.763831
    glass_code: 620638
    density:
      - value: 3690
    thermal_expansion:
      - temperature_range: 243 343
        value: 1.05e-05
      - temperature_range: 293 573
        value: 1.28e-05
    dPgF: 0.0062