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Optical constants of CDGM - LAK (Lanthanum crown)
H-LAK52

Wavelength: µm
 (0.280 – 2.400)  
 

Derived optical constants

n   k   logX   logY   eV

Dispersion formula

$$n^2=2.92799279-0.0122458967λ^{2}+0.0239216813λ^{-2}-0.000731304876λ^{-4}+0.000147071309λ^{-6}-6.91523554\text{×}10^{-06}λ^{-8}$$

Conditions & Spec sheet

n_absolute: false
λ_vacuum: false
temperature: 20.0 °C
thermal_dispersion:
  - type: "Schott formula"
    coefficients: 6.78e-07 1.74e-08 -3.85e-12 3.95e-07 7.06e-10 0.201
n_d: 1.729164
V_d: 54.669031
glass_code: 729547
glass_status: standard
density: 4.02 g/cm3
thermal_expansion:
  - temperature_range: -30 70 °C
    coefficient: 5.6e-06 K-1
  - temperature_range: 20 300 °C
    coefficient: 7.2e-06 K-1
ΔP_gF: -0.0081
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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