# 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: "Recommended - Lightweight "
DATA:
  - type: formula 2 
    wavelength_range: 0.36 2.4
    coefficients: 0 1.42193846 0.0107291511 0.133827968 0.0572587546 1.45060574 145.381805
  - type: tabulated k
    data: |
        0.360 7.2357E-06
        0.370 2.4173E-06
        0.380 9.5167E-07
        0.390 4.3220E-07
        0.400 1.9019E-07
        0.420 7.4350E-08
        0.440 4.5817E-08
        0.460 3.6790E-08
        0.480 3.0681E-08
        0.500 2.3945E-08
        0.550 1.3150E-08
        0.600 1.4345E-08
        0.650 2.0732E-08
        0.700 1.6736E-08
        0.800 6.3694E-09
        0.900 7.1656E-09
        1.000 7.9617E-09
        1.200 9.5541E-09
        1.400 5.5844E-08
        1.600 6.3822E-08
        1.800 2.3104E-07
        2.000 4.6837E-07
        2.200 1.2705E-06
        2.400 1.7174E-06
SPECS:
    n_absolute: false
    wavelength_vacuum: false
    temperature: 25.0 °C
    thermal_dispersion:
      - type: "Schott formula"
        coefficients: 1.62e-07 1.19e-08 -3.5e-11 6.49e-07 8.6e-10 0.291
    nd: 1.620041
    Vd: 36.263378
    glass_code: 620363
    density: 2.69 g/cm<sup>3</sup>
    thermal_expansion:
      - temperature_range: -30 70 °C
        coefficient: 8.1e-06 K<sup>-1</sup>
      - temperature_range: 20 300 °C
        coefficient: 9.5e-06 K<sup>-1</sup>
    dPgF: 0.0051
    climatic_resistance: 2.0
    acid_resistance: 1.0
    phosphate_resistance: 1.0
