Optical constants of SUMITA - FIR
K-FIR97UV
Wavelength:
µm
(0.270–2.000)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2=2.0169979-0.0038361684λ^{2}+0.0058184635λ^{-2}+4.503131\text{×}10^{-05}λ^{-4}+6.6434463\text{×}10^{-07}λ^{-6}+5.0922311\text{×}10^{-09}λ^{-8}$$Conditions & Spec sheet
n_is_absolute: false
wavelength_is_vacuum: false
temperature: 20.0 °C
thermal_dispersion:
- type: "Schott formula"
coefficients: -1.99e-05 -5.55e-09 -1.56e-11 2.73e-07 7.18e-11 0.183
nd: 1.42580
Vd: 97.4
glass_code: 426974
density: 3.75 g/cm3
thermal_expansion:
- temperature_range: -30 70 °C
coefficient: 1.3e-05 K-1
- temperature_range: 20 300 °C
coefficient: 1.61e-05 K-1
dPgF: 0.0526
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