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Optical constants of SCHOTT - LaK (Lanthanum crown)
N-LAK33B
Wavelength:
µm
(0.3 – 2.5)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2-1=\frac{1.42288601λ^2}{λ^2-0.00670283452}+\frac{0.593661336λ^2}{λ^2-0.021941621}+\frac{1.1613526λ^2}{λ^2-80.7407701}$$Conditions & Spec sheet
n_absolute: false
wavelength_vacuum: false
temperature: 20.0 °C
thermal_dispersion:
- type: "Schott formula"
coefficients: 2.77e-06 1.24e-08 1.22e-11 5.19e-07 6.02e-10 0.184
nd: 1.755
Vd: 52.3
glass_code: 755523.422
glass_status: standard
density: 4.221 g/cm3
thermal_expansion:
- temperature_range: -30 70 °C
coefficient: 5.83e-06 K-1
- temperature_range: 20 300 °C
coefficient: 7.06e-06 K-1
dPgF: -0.0085
climatic_resistance: 1.0
stain_resistance: 1.0
acid_resistance: 51.3
alkali_resistance: 1.0
phosphate_resistance: 2.0
Comments
References
SCHOTT Zemax catalog 2017-01-20b (obtained from http://www.schott.com)
See also SCHOTT glass data sheets