# 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/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="https://refractiveindex.info/download/data/2016/sumita_2016-02-01.pdf">SUMITA optical glass data book</a>
DATA:
  - type: formula 3
    wavelength_range: 0.4 1.55
    coefficients: 3.4407637 -0.015750622 2 0.059024249 -2 0.0035647556 -4 -0.00012641103 -6 4.0309245e-05 -8
  - type: tabulated k
    data: |
        0.380 1.6697E-05
        0.390 7.7620E-06
        0.400 4.2635E-06
        0.420 1.8379E-06
        0.440 1.1163E-06
        0.460 8.5362E-07
        0.480 6.9336E-07
        0.500 5.4041E-07
        0.550 2.1529E-07
        0.600 1.0134E-07
        0.650 8.3430E-08
        0.700 5.5985E-08
        0.800 3.8312E-08
        1.060 1.6887E-08
        1.500 7.1835E-08
        2.000 4.0295E-07
CONDITIONS:
    temperature: 293
PROPERTIES:
    thermal_dispersion:
      - type: formula A
        coefficients: -3.11e-06 1.75e-08 -2.81e-10 1.25e-06 1.62e-09 0.307
    nd: 1.90680
    Vd: 21.2
    glass_code: 907212
    density:
      - value: 4150
    thermal_expansion:
      - temperature_range: 243 343
        value: 7.4e-06
      - temperature_range: 293 573
        value: 1.02e-05
    dPgF: 0.0245
    resistance:
        climatic: 1.0
        acid: 1.0