Optical constants of SUMITA - VC
K-VC78(M)
Wavelength:
µm
(0.270 – 2.000)
Derived optical constants
n
k
logX
logY
eV
Dispersion formula
$$n^2=2.7266185-0.012222673λ^{2}+0.017519329λ^{-2}+0.00043056615λ^{-4}-2.0621869\text{×}10^{-05}λ^{-6}+1.440444\text{×}10^{-06}λ^{-8}$$Conditions & Spec sheet
n_absolute: false
wavelength_vacuum: false
temperature: 20.0 °C
thermal_dispersion:
- type: "Schott formula"
coefficients: -1e-06 1.6e-08 -1.38e-10 5.07e-07 3.13e-10 0.19
nd: 1.66624
Vd: 55.1
glass_code: 670554
density: 3.44 g/cm3
thermal_expansion:
- temperature_range: -30 70 °C
coefficient: 8e-06 K-1
- temperature_range: 20 300 °C
coefficient: 1e-05 K-1
dPgF: -0.0075
climatic_resistance: 1.0
acid_resistance: 4.0
References
SUMITA Zemax catalog 2017-02-02 (obtained from http://www.sumita-opt.co.jp)
See also SUMITA optical glass data book