Optical constants of SUMITA - SFLD
K-SFLD4
Wavelength:
µm
(0.360–2.000)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2=2.9621759-0.011836005λ^{2}+0.037648353λ^{-2}+0.0015341601λ^{-4}-1.0776303\text{×}10^{-05}λ^{-6}+1.378924\text{×}10^{-05}λ^{-8}$$Conditions & Spec sheet
n_is_absolute: false
wavelength_is_vacuum: false
temperature: 20.0 °C
thermal_dispersion:
- type: "Schott formula"
coefficients: -2.91e-06 1.97e-08 -3.23e-10 8.95e-07 9.72e-10 0.291
nd: 1.75520
Vd: 27.5
glass_code: 755275
density: 3.19 g/cm3
thermal_expansion:
- temperature_range: -30 70 °C
coefficient: 8.6e-06 K-1
- temperature_range: 20 300 °C
coefficient: 9.1e-06 K-1
dPgF: 0.0131
climatic_resistance: 1.0
acid_resistance: 1.0
References
SUMITA Zemax catalog 2017-02-02 (obtained from http://www.sumita-opt.co.jp)
See also SUMITA optical glass data book