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Optical constants of CDGM - LAK (Lanthanum crown)
H-LAK10

Wavelength: µm
 (0.290 – 2.400)  
 

Derived optical constants

n   k   logX   logY   eV

Dispersion formula

$$n^2=2.67519359-0.00927946143λ^{2}+0.018891795λ^{-2}-0.000239296657λ^{-4}+7.29098315\text{×}10^{-05}λ^{-6}-3.36344313\text{×}10^{-06}λ^{-8}$$

Conditions & Spec sheet

n_absolute: false
wavelength_vacuum: false
temperature: 20.0 °C
thermal_dispersion:
  - type: "Schott formula"
    coefficients: -6.75e-07 1.72e-08 -1.1e-11 3.91e-07 -4.26e-10 0.264
nd: 1.651133
Vd: 55.903805
glass_code: 651559
density: 3.73 g/cm3
thermal_expansion:
  - temperature_range: -30 70 °C
    coefficient: 7.1e-06 K-1
  - temperature_range: 20 300 °C
    coefficient: 8.4e-06 K-1
dPgF: -0.0033
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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