Optical constants of SUMITA - FIR
K-FIR98UV
Wavelength:
µm
(0.270–2.000)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2=2.0158016-0.0038179076λ^{2}+0.0058067887λ^{-2}+4.2558748\text{×}10^{-05}λ^{-4}+7.6622455\text{×}10^{-07}λ^{-6}+1.6716816\text{×}10^{-09}λ^{-8}$$Conditions & Spec sheet
n_is_absolute: false
wavelength_is_vacuum: false
temperature: 20.0 °C
thermal_dispersion:
- type: "Schott formula"
coefficients: -2.03e-05 -7.73e-09 1.17e-11 3.55e-07 7.78e-10 0.111
nd: 1.42537
Vd: 97.8
glass_code: 425978
density: 3.75 g/cm3
thermal_expansion:
- temperature_range: -30 70 °C
coefficient: 1.3e-05 K-1
- temperature_range: 20 300 °C
coefficient: 1.63e-05 K-1
dPgF: 0.0533
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