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Optical constants of SCHOTT - LaK (Lanthanum crown)
N-LAK22

Wavelength: µm
 (0.31 – 2.5)  
 

Other optical constants

n   k   logX   logY   eV

Dispersion formula [ i ]

$$n^2-1=\frac{1.14229781λ^2}{λ^2-0.00585778594}+\frac{0.535138441λ^2}{λ^2-0.0198546147}+\frac{1.04088385λ^2}{λ^2-100.834017}$$

Data

[Expressions for n]   [CSV - comma separated]   [TXT - tab separated]   [Full database record]

Additional information

n_is_absolute: false
λ_is_vacuum: false
temperature: 20.0 °C
coefficients_of_thermal_dispersion: 1.36e-06 1.49e-08 -1.29e-11 3.41e-07 2.09e-10 0.262
n_d: 1.65113
V_d: 55.89
glass_code: 651559.377
glass_status: standard
density: 3.768 g/cm3
coefficient_of_thermal_expansion_1: 6.6e-06 K-1
coefficient_of_thermal_expansion_2: 7.4e-06 K-1
ΔP_gF: -0.0031
climatic_resistance: 2.0
stain_resistance: 2.0
acid_resistance: 51.2
alkali_resistance: 1.0
phosphate_resistance: 2.3

References

1) SCHOTT optical glass data sheets 2015-07-22
2) SCHOTT Zemax catalog 2015-07-22

More info - wiki

SCHOTT AG is a German glass manufacturer. SCHOTT also publishes a glass catalog (SCHOTT Optical Glass Datasheets), which is a standard reference for the properties of many optical glasses.

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