# 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=\"http://refractiveindex.info/download/data/2017/sumita_2017-02-02.agf\">SUMITA Zemax catalog 2017-02-02</a> (obtained from <a href=\"http://www.sumita-opt.co.jp/en/download/\">http://www.sumita-opt.co.jp</a>)<br>See also <a href=\"http://refractiveindex.info/download/data/2016/sumita_2016-02-01.pdf\">SUMITA optical glass data book</a>"
DATA:
  - type: formula 3 
    wavelength_range: 0.36 1.55
    coefficients: 2.9746618 -0.015490396 2 0.021676376 -2 0.0007907947 -4 -3.5069226e-05 -6 2.1235401e-06 -8
  - type: tabulated k
    data: |
        0.330 1.0550E-05
        0.340 4.5220E-06
        0.350 1.9868E-06
        0.360 9.6908E-07
        0.370 5.2038E-07
        0.380 3.0519E-07
        0.390 1.8873E-07
        0.400 1.3658E-07
        0.420 7.4350E-08
        0.440 4.9366E-08
        0.460 3.6790E-08
        0.480 2.2987E-08
        0.500 1.5947E-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
        1.060 1.6887E-08
        1.500 5.9833E-08
        2.000 6.1658E-07
SPECS:
    n_absolute: false
    wavelength_vacuum: false
    temperature: 20.0 °C
    thermal_dispersion:
      - type: "Schott formula"
        coefficients: 2.26e-06 2.18e-08 -2.34e-10 5.21e-07 6.65e-10 0.203
    nd: 1.74300
    Vd: 49.2
    glass_code: 743492
    density: 4.05 g/cm<sup>3</sup>
    thermal_expansion:
      - temperature_range: -30 70 °C
        coefficient: 5.1e-06 K<sup>-1</sup>
      - temperature_range: 20 300 °C
        coefficient: 7.1e-06 K<sup>-1</sup>
    dPgF: -0.0084
    climatic_resistance: 1.0
    acid_resistance: 4.0
