Optical constants of SCHOTT - FK (Fluor crown)
N-FK5
Wavelength:
µm
(0.26–2.5)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2-1=\frac{0.844309338λ^2}{λ^2-0.00475111955}+\frac{0.344147824λ^2}{λ^2-0.0149814849}+\frac{0.910790213λ^2}{λ^2-97.8600293}$$Conditions & Spec sheet
n_is_absolute: false
wavelength_is_vacuum: false
temperature: 20.0 °C
thermal_dispersion:
- type: "Schott formula"
coefficients: -7.24e-06 1.58e-08 -9.51e-12 3.51e-07 4.61e-10 0.156
nd: 1.48749
Vd: 70.41
glass_code: 487704.245
glass_status: standard
density: 2.45 g/cm3
thermal_expansion:
- temperature_range: -30 70 °C
coefficient: 9.2e-06 K-1
- temperature_range: 20 300 °C
coefficient: 1e-05 K-1
dPgF: 0.0036
climatic_resistance: 2.0
stain_resistance: 1.0
acid_resistance: 4.0
alkali_resistance: 2.0
phosphate_resistance: 2.3
Comments
suitable for precision molding. step 0.5 available
References
SCHOTT Zemax catalog 2017-01-20b (obtained from http://www.schott.com)
See also SCHOTT glass data sheets