# 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: "Improved Transmittance"
DATA:
  - type: formula 3 
    range: 0.3 2.4
    coefficients: 2.9157717 -0.0100817 2 0.03409894 -2 0.0021965014 -4 -0.00012386955 -6 1.5766843e-05 -8
  - type: tabulated k
    data: |
        0.340 1.2460E-05
        0.350 4.6255E-06
        0.360 1.7127E-06
        0.370 8.0804E-07
        0.380 4.2112E-07
        0.390 2.5878E-07
        0.400 1.6327E-07
        0.420 7.7770E-08
        0.440 4.5817E-08
        0.460 3.3094E-08
        0.480 2.2987E-08
        0.500 1.5947E-08
        0.550 8.7623E-09
        0.600 9.5589E-09
        0.650 1.0355E-08
        0.700 1.1152E-08
        0.800 6.3694E-09
        0.900 7.1656E-09
SPECS:
    n_is_absolute: false
    λ_is_vacuum: false
    temperature: 25.0 °C
    coefficients_of_thermal_dispersion: 1.163e-05 0.0 0.0 0.0 0.0 0.0
    n_d: 1.739998
    V_d: 28.287409
    glass_code: 740283
    glass_status: preferred
    density: 4.66 g/cm<sup>3</sup>
    coefficient_of_thermal_expansion_1: 8.2e-06 K<sup>-1</sup>
    coefficient_of_thermal_expansion_2: 9.2e-06 K<sup>-1</sup>
    ΔP_gF: 0.006
    acid_resistance: 3.2
    phosphate_resistance: 3.0
