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Optical constants of SCHOTT - LaK (Lanthanum crown)
N-LAK9

Wavelength: µm
 (0.32 – 2.5)  
 

Other optical constants

n   k   logX   logY   eV

Dispersion formula [ i ]

$$n^2-1=\frac{1.46231905λ^2}{λ^2-0.00724270156}+\frac{0.344399589λ^2}{λ^2-0.0243353131}+\frac{1.15508372λ^2}{λ^2-85.4686868}$$

Comments

step 0.5 available

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: 2.11e-06 1.11e-08 1.82e-12 4.74e-07 -3.47e-10 0.146
n_d: 1.691
V_d: 54.71
glass_code: 691547.351
glass_status: standard
density: 3.51 g/cm3
coefficient_of_thermal_expansion_1: 6.3e-06 K-1
coefficient_of_thermal_expansion_2: 7.5e-06 K-1
ΔP_gF: -0.0071
climatic_resistance: 3.0
stain_resistance: 3.0
acid_resistance: 52.0
alkali_resistance: 1.2
phosphate_resistance: 4.3

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.

External links