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Optical constants of CDGM - LAK (Lanthanum crown)
D-LAK6

Wavelength: µm
 (0.300 – 2.400)  
 

Derived optical constants

n   k   logX   logY   eV

Dispersion formula

$$n^2=2.81430513-0.0134495125λ^{2}+0.0196569671λ^{-2}+0.000249252546λ^{-4}+1.98274573\text{×}10^{-05}λ^{-6}-8.02641015\text{×}10^{-07}λ^{-8}$$

Conditions & Spec sheet

n_absolute: false
wavelength_vacuum: false
temperature: 20.0 °C
thermal_dispersion:
  - type: "Schott formula"
    coefficients: 3.02e-06 2.72e-08 -3.08e-10 6.36e-07 8.89e-10 0.147
nd: 1.693847
Vd: 53.151009
glass_code: 694531
density: 3.5 g/cm3
thermal_expansion:
  - temperature_range: -30 70 °C
    coefficient: 7.5e-06 K-1
  - temperature_range: 20 300 °C
    coefficient: 9.5e-06 K-1
dPgF: -0.0085
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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