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Optical constants of CDGM - LAK (Lanthanum crown)
H-LAK5A

Wavelength: µm
 (0.280 – 2.400)  
 

Derived optical constants

n   k   logX   logY   eV

Dispersion formula

$$n^2=2.76282776-0.0110853656λ^{2}+0.0190396002λ^{-2}+5.14224172\text{×}10^{-05}λ^{-4}+3.63740807\text{×}10^{-05}λ^{-6}-1.55525971\text{×}10^{-06}λ^{-8}$$

Conditions & Spec sheet

n_absolute: false
wavelength_vacuum: false
temperature: 20.0 °C
thermal_dispersion:
  - type: "Schott formula"
    coefficients: -3.62e-06 2.05e-08 -5.03e-11 5.34e-07 1.59e-10 0.168
nd: 1.677903
Vd: 55.559699
glass_code: 678555
glass_status: standard
density: 3.8 g/cm3
thermal_expansion:
  - temperature_range: -30 70 °C
    coefficient: 8e-06 K-1
  - temperature_range: 20 300 °C
    coefficient: 9.4e-06 K-1
dPgF: -0.0056
climatic_resistance: 2.0

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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