# 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/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="https://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 1.4168047 0.0100732158 0.196785057 0.0537616908 1.68001322 164.672436
  - type: tabulated k
    data: |
        0.360 8.5821E-06
        0.370 2.6252E-06
        0.380 9.5167E-07
        0.390 4.3220E-07
        0.400 2.1393E-07
        0.420 9.1481E-08
        0.440 6.0036E-08
        0.460 4.7899E-08
        0.480 3.8389E-08
        0.500 3.1959E-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 1.4338E-08
        1.000 1.5931E-08
        1.200 1.9118E-08
        1.400 5.5844E-08
        1.600 7.6624E-08
        1.800 2.3104E-07
        2.000 4.3563E-07
        2.200 1.1579E-06
        2.400 1.6132E-06
CONDITIONS:
    temperature: 298
PROPERTIES:
    thermal_dispersion:
      - type: formula A
        coefficients: -1.02e-06 1.14e-08 -3.41e-11 7.97e-07 1.01e-09 0.269
    nd: 1.639799
    Vd: 34.466422
    glass_code: 640345
    density:
      - value: 2760
    thermal_expansion:
      - temperature_range: 243 343
        value: 8e-06
      - temperature_range: 293 573
        value: 9.9e-06
    dPgF: 0.0065
    resistance:
        climatic: 2.0
        acid: 1.0
        phosphate: 1.0