# 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: 0.37 2.4
    coefficients: 0 1.68915108 0.0128202514 0.290462024 0.0618090841 2.37971516 201.094352
  - type: tabulated k
    data: |
        0.370 6.7797E-06
        0.380 2.5521E-06
        0.390 1.1069E-06
        0.400 5.5498E-07
        0.420 2.2821E-07
        0.440 1.4293E-07
        0.460 1.0773E-07
        0.480 8.8880E-08
        0.500 6.8222E-08
        0.550 3.0745E-08
        0.600 3.3540E-08
        0.650 5.1986E-08
        0.700 4.4743E-08
        0.800 1.9127E-08
        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 1.7293E-07
        2.000 2.8909E-07
        2.200 6.9645E-07
        2.400 1.1411E-06
CONDITIONS:
    temperature: 298
PROPERTIES:
    thermal_dispersion:
      - type: formula A
        coefficients: -2.83e-06 1.27e-08 -3.36e-11 8.35e-07 1.16e-09 0.31
    nd: 1.761821
    Vd: 26.517885
    glass_code: 762265
    density:
      - value: 3170
    thermal_expansion:
      - temperature_range: 243 343
        value: 8.7e-06
      - temperature_range: 293 573
        value: 1e-05
    dPgF: 0.015
    resistance:
        climatic: 2.0
        acid: 1.0
        phosphate: 1.0