# 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 
    range: 0.37 2.4
    coefficients: 0 1.73986485 0.01294413 0.313894918 0.0612116868 2.31093206 197.420482
  - type: tabulated k
    data: |
        0.370 6.2428E-06
        0.380 2.4826E-06
        0.390 1.2429E-06
        0.400 7.1029E-07
        0.420 3.2993E-07
        0.440 1.9067E-07
        0.460 1.4181E-07
        0.480 1.0848E-07
        0.500 8.4446E-08
        0.550 3.5155E-08
        0.600 3.8351E-08
        0.650 4.6764E-08
        0.700 3.9130E-08
        0.800 1.2745E-08
        0.900 1.4338E-08
        1.000 1.5931E-08
        1.200 9.5541E-09
        1.400 3.3473E-08
        1.600 5.1032E-08
        1.800 1.7293E-07
        2.000 3.0530E-07
        2.200 6.7824E-07
        2.400 1.2428E-06
SPECS:
    n_is_absolute: false
    λ_is_vacuum: false
    temperature: 25.0 °C
    coefficients_of_thermal_dispersion: -3.78e-06 1.09e-08 -3.66e-11 8.62e-07 1.13e-09 0.309
    n_d: 1.784696
    V_d: 26.291221
    glass_code: 785263
    density: 3.3 g/cm<sup>3</sup>
    coefficient_of_thermal_expansion_1: 8.8e-06 K<sup>-1</sup>
    coefficient_of_thermal_expansion_2: 1.06e-05 K<sup>-1</sup>
    ΔP_gF: 0.0146
    climatic_resistance: 2.0
    acid_resistance: 1.0
    phosphate_resistance: 1.0
