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Optical constants of CDGM - LAK (Lanthanum crown)
H-LAK12

Wavelength: µm
 (0.280 – 2.400)  
 

Derived optical constants

n   k   logX   logY   eV

Dispersion formula

$$n^2=2.82673774-0.0136335725λ^{2}+0.0190474212λ^{-2}+0.000204685509λ^{-4}+8.81193052\text{×}10^{-06}λ^{-6}-2.15937861\text{×}10^{-08}λ^{-8}$$

Conditions & Spec sheet

n_absolute: false
λ_vacuum: false
temperature: 20.0 °C
thermal_dispersion:
  - type: "Schott formula"
    coefficients: 8.75e-08 1.9e-08 -8.47e-11 4.12e-07 -1.87e-10 0.224
n_d: 1.696801
V_d: 56.199825
glass_code: 697562
density: 3.71 g/cm3
thermal_expansion:
  - temperature_range: -30 70 °C
    coefficient: 6.4e-06 K-1
  - temperature_range: 20 300 °C
    coefficient: 8e-06 K-1
ΔP_gF: -0.01
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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