# 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/sumita_2017-02-02.agf\">SUMITA Zemax catalog 2017-02-02</a> (obtained from <a href=\"http://www.sumita-opt.co.jp/en/download/\">http://www.sumita-opt.co.jp</a>)<br>See also <a href=\"http://refractiveindex.info/download/data/2016/sumita_2016-02-01.pdf\">SUMITA optical glass data book</a>"
DATA:
  - type: formula 3 
    range: 0.4 1.55
    coefficients: 2.9793916 -0.011878549 2 0.03964328 -2 0.0014928665 -4 1.9358213e-05 -6 1.2712921e-05 -8
  - type: tabulated k
    data: |
        0.370 5.2521E-06
        0.380 1.9716E-06
        0.390 9.1776E-07
        0.400 5.3609E-07
        0.420 2.7868E-07
        0.440 2.0178E-07
        0.460 1.6089E-07
        0.480 1.2423E-07
        0.500 1.0074E-07
        0.550 5.2839E-08
        0.600 4.7987E-08
        0.650 7.2927E-08
        0.700 5.5985E-08
        0.800 1.2745E-08
        1.060 1.6887E-08
        1.500 4.7842E-08
        2.000 4.0295E-07
SPECS:
    n_is_absolute: false
    λ_is_vacuum: false
    temperature: 20.0 °C
    coefficients_of_thermal_dispersion: -4.13e-06 1.55e-08 -2.99e-10 9.65e-07 1.53e-09 0.29
    n_d: 1.76182
    V_d: 26.5
    glass_code: 762265
    density: 3.15 g/cm<sup>3</sup>
    coefficient_of_thermal_expansion_1: 8.5e-06 K<sup>-1</sup>
    coefficient_of_thermal_expansion_2: 1.02e-05 K<sup>-1</sup>
    ΔP_gF: 0.0144
    climatic_resistance: 1.0
    acid_resistance: 1.0
