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Optical constants of CDGM - LAK (Lanthanum crown)
D-LAK5

Wavelength: µm
 (0.280 – 2.400)  
 

Derived optical constants

n   k   logX   logY   eV

Dispersion formula

$$n^2=2.76433988-0.0131613327λ^{2}+0.0182673276λ^{-2}+0.000301224328λ^{-4}+4.56200323\text{×}10^{-06}λ^{-6}-2.05087278\text{×}10^{-09}λ^{-8}$$

Conditions & Spec sheet

n_is_absolute: false
λ_is_vacuum: false
temperature: 20.0 °C
coefficients_of_thermal_dispersion: 1.76e-06 1.72e-08 -6.77e-11 3.92e-07 6.44e-10 0.23
n_d: 1.677900
V_d: 54.896588
glass_code: 678549
density: 3.37 g/cm3
coefficient_of_thermal_expansion_1: 7.3e-06 K-1
coefficient_of_thermal_expansion_2: 9.4e-06 K-1
ΔP_gF: -0.0069
climatic_resistance: 1.0

References

CDGM Zemax catalog 2017-09 (obtained from http://www.cdgmgd.com)

Data

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

INFO

CDGM Glass Co., Ltd.

CDGM Glass Co., Ltd. is a leading optical glass supplier in China with a worldwile distribution network.

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