Optical constants of SCHOTT - LaF (Lanthanum flint)
N-LAF21
Wavelength:
µm
(0.334–2.5)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2-1=\frac{1.87134529λ^2}{λ^2-0.0093332228}+\frac{0.25078301λ^2}{λ^2-0.0345637762}+\frac{1.22048639λ^2}{λ^2-83.2404866}$$Conditions & Spec sheet
n_is_absolute: false
wavelength_is_vacuum: false
temperature: 20.0 °C
thermal_dispersion:
- type: "Schott formula"
coefficients: 3.11e-06 1.13e-08 -2.07e-11 5.88e-07 6.32e-10 0.199
nd: 1.788
Vd: 47.49
glass_code: 788475.428
glass_status: standard
density: 4.281 g/cm3
thermal_expansion:
- temperature_range: -30 70 °C
coefficient: 5.99e-06 K-1
- temperature_range: 20 300 °C
coefficient: 7.08e-06 K-1
dPgF: -0.0084
climatic_resistance: 1.0
stain_resistance: 1.0
acid_resistance: 51.3
alkali_resistance: 1.0
phosphate_resistance: 1.3
Comments
References
SCHOTT Zemax catalog 2017-01-20b (obtained from http://www.schott.com)
See also SCHOTT glass data sheets