# 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/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=\"http://refractiveindex.info/download/data/2017/ohara_2017-11-30.pdf\">OHARA glass data sheets</a>"
COMMENTS: ""
DATA:
  - type: formula 2 
    wavelength_range: 0.3 2.4
    coefficients: 0 1.59470208 0.0122277091 0.317791814 0.0544975824 1.29219485 147.63368
  - type: tabulated k
    data: |
        0.350 6.4132E-06
        0.360 2.6250E-06
        0.370 1.2234E-06
        0.380 7.1281E-07
        0.390 4.6808E-07
        0.400 2.8972E-07
        0.420 1.3992E-07
        0.440 7.7891E-08
        0.460 4.4192E-08
        0.480 2.6832E-08
        0.500 1.5947E-08
        0.550 8.7623E-09
        0.600 4.7770E-09
        0.650 1.0355E-08
        0.700 5.5732E-09
        0.800 6.3694E-09
        0.900 7.1656E-09
        1.000 7.9617E-09
        1.200 9.5541E-09
        1.400 3.3473E-08
        1.600 5.1032E-08
        1.800 2.0195E-07
        2.000 3.7033E-07
        2.200 8.7958E-07
        2.400 1.3040E-06
SPECS:
    n_absolute: false
    wavelength_vacuum: false
    temperature: 25.0 °C
    thermal_dispersion:
      - type: "Schott formula"
        coefficients: 1.078e-05 0.0 0.0 0.0 0.0 0.0
    nd: 1.739998
    Vd: 28.283809
    glass_code: 740283
    glass_status: preferred
    density: 4.66 g/cm<sup>3</sup>
    thermal_expansion:
      - temperature_range: -30 70 °C
        coefficient: 8.3e-06 K<sup>-1</sup>
      - temperature_range: 20 300 °C
        coefficient: 9.2e-06 K<sup>-1</sup>
    dPgF: 0.007
    acid_resistance: 3.2
    phosphate_resistance: 3.0
