# 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 1.47008105 0.0102900432 0.224752746 0.0541276904 2.44968592 237.43494
  - type: tabulated k
    data: |
        0.360 1.0046E-05
        0.370 3.2643E-06
        0.380 1.2565E-06
        0.390 6.1590E-07
        0.400 3.1422E-07
        0.420 1.2948E-07
        0.440 9.5838E-08
        0.460 7.3953E-08
        0.480 5.7730E-08
        0.500 4.4010E-08
        0.550 2.6340E-08
        0.600 2.3933E-08
        0.650 3.1129E-08
        0.700 2.7922E-08
        0.800 1.2745E-08
        0.900 7.1656E-09
        1.000 1.5931E-08
        1.200 1.9118E-08
        1.400 5.5844E-08
        1.600 7.6624E-08
        1.800 2.4560E-07
        2.000 4.6837E-07
        2.200 1.1392E-06
        2.400 1.7383E-06
SPECS:
    n_absolute: false
    wavelength_vacuum: false
    temperature: 25.0 °C
    thermal_dispersion:
      - type: "Schott formula"
        coefficients: -2.24e-06 1.21e-08 -4.81e-11 6.82e-07 7.42e-10 0.299
    nd: 1.666800
    Vd: 33.054985
    glass_code: 667330
    density: 2.92 g/cm<sup>3</sup>
    thermal_expansion:
      - temperature_range: -30 70 °C
        coefficient: 8.7e-06 K<sup>-1</sup>
      - temperature_range: 20 300 °C
        coefficient: 1.04e-05 K<sup>-1</sup>
    dPgF: 0.0077
    climatic_resistance: 1.0
    acid_resistance: 1.0
    phosphate_resistance: 1.0
