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Optical constants of CDGM - LAK (Lanthanum crown)
H-LAK50A

Wavelength: µm
 (0.300 – 2.400)  
 

Derived optical constants

n   k   logX   logY   eV

Dispersion formula

$$n^2=2.68411905-0.013655729λ^{2}+0.0156617129λ^{-2}+0.00038271126λ^{-4}-8.02343758\text{×}10^{-06}λ^{-6}+1.71633677\text{×}10^{-07}λ^{-8}$$

Conditions & Spec sheet

n_absolute: false
wavelength_vacuum: false
temperature: 20.0 °C
thermal_dispersion:
  - type: "Schott formula"
    coefficients: 5.6e-07 1.06e-08 -4.91e-11 3.57e-07 6.22e-10 0.245
nd: 1.651605
Vd: 58.416296
glass_code: 652584
density: 3.5 g/cm3
thermal_expansion:
  - temperature_range: -30 70 °C
    coefficient: 6.3e-06 K-1
  - temperature_range: 20 300 °C
    coefficient: 8.2e-06 K-1
dPgF: -0.0057
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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