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Optical constants of CDGM - LAK (Lanthanum crown)
H-LAK4L

Wavelength: µm
 (0.280 – 2.400)  
 

Derived optical constants

n   k   logX   logY   eV

Dispersion formula

$$n^2=2.64769834-0.0137710798λ^{2}+0.015665045λ^{-2}+9.82676335\text{×}10^{-05}λ^{-4}+2.2112348\text{×}10^{-05}λ^{-6}-1.07455498\text{×}10^{-06}λ^{-8}$$

Conditions & Spec sheet

n_is_absolute: false
λ_is_vacuum: false
temperature: 20.0 °C
coefficients_of_thermal_dispersion: 1.06e-06 1.84e-08 -7.4e-11 2.79e-07 6.19e-10 0.275
n_d: 1.640002
V_d: 60.213997
glass_code: 640602
density: 2.99 g/cm3
coefficient_of_thermal_expansion_1: 6e-06 K-1
coefficient_of_thermal_expansion_2: 7.8e-06 K-1
ΔP_gF: -0.0062
climatic_resistance: 3.0

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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