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Optical constants of CDGM - LAK (Lanthanum crown)
H-LAK8A

Wavelength: µm
 (0.320 – 2.400)  
 

Derived optical constants

n   k   logX   logY   eV

Dispersion formula

$$n^2=2.89697306-0.0143738053λ^{2}+0.0222280432λ^{-2}+0.000105067282λ^{-4}+5.16989124\text{×}10^{-05}λ^{-6}-1.90417816\text{×}10^{-06}λ^{-8}$$

Conditions & Spec sheet

n_is_absolute: false
λ_is_vacuum: false
temperature: 20.0 °C
coefficients_of_thermal_dispersion: 4.02e-06 1.82e-08 -1.04e-10 4.87e-07 9.07e-10 0.216
n_d: 1.720000
V_d: 50.351963
glass_code: 720503
glass_status: preferred
density: 3.77 g/cm3
coefficient_of_thermal_expansion_1: 5.3e-06 K-1
coefficient_of_thermal_expansion_2: 7.2e-06 K-1
ΔP_gF: -0.0071
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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