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Optical constants of CDGM - LAK (Lanthanum crown)
D-LAK70

Wavelength: µm
 (0.280 – 2.400)  
 

Derived optical constants

n   k   logX   logY   eV

Dispersion formula

$$n^2=2.73281949-0.0114137973λ^{2}+0.0202755954λ^{-2}-0.000478308953λ^{-4}+0.000110158258λ^{-6}-5.30283301\text{×}10^{-06}λ^{-8}$$

Conditions & Spec sheet

n_is_absolute: false
λ_is_vacuum: false
temperature: 20.0 °C
coefficients_of_thermal_dispersion: 1.85e-06 2.21e-08 -1.31e-10 4.54e-07 5.36e-10 0.235
n_d: 1.669102
V_d: 55.402300
glass_code: 669554
density: 3.35 g/cm3
coefficient_of_thermal_expansion_1: 7.3e-06 K-1
coefficient_of_thermal_expansion_2: 9.1e-06 K-1
ΔP_gF: -0.006
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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