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Optical constants of CDGM - LAK (Lanthanum crown)
H-LAK8B

Wavelength: µm
 (0.310 – 2.400)  
 

Derived optical constants

n   k   logX   logY   eV

Dispersion formula

$$n^2=2.8950254-0.0117106099λ^{2}+0.0225402373λ^{-2}+0.000146324301λ^{-4}+4.12272418\text{×}10^{-05}λ^{-6}-1.47798073\text{×}10^{-06}λ^{-8}$$

Conditions & Spec sheet

n_is_absolute: false
λ_is_vacuum: false
temperature: 20.0 °C
coefficients_of_thermal_dispersion: 3.65e-08 1.34e-08 -5.18e-11 4.63e-07 7.58e-10 0.25
n_d: 1.720000
V_d: 50.294444
glass_code: 720503
density: 3.88 g/cm3
coefficient_of_thermal_expansion_1: 7.6e-06 K-1
coefficient_of_thermal_expansion_2: 9.1e-06 K-1
ΔP_gF: -0.007
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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