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Optical constants of CDGM - LAK (Lanthanum crown)
H-LAK1

Wavelength: µm
 (0.290 – 2.400)  
 

Derived optical constants

n   k   logX   logY   eV

Dispersion formula

$$n^2=2.70432455-0.0100067787λ^{2}+0.018102254λ^{-2}-2.16494884\text{×}10^{-05}λ^{-4}+3.81507477\text{×}10^{-05}λ^{-6}-1.57874424\text{×}10^{-06}λ^{-8}$$

Conditions & Spec sheet

n_absolute: false
λ_vacuum: false
temperature: 20.0 °C
thermal_dispersion:
  - type: "Schott formula"
    coefficients: -5.01e-06 2.49e-08 -4.65e-11 5.72e-07 -7.93e-10 0.06
n_d: 1.659500
V_d: 57.385393
glass_code: 660574
density: 3.94 g/cm3
thermal_expansion:
  - temperature_range: -30 70 °C
    coefficient: 7.7e-06 K-1
  - temperature_range: 20 300 °C
    coefficient: 8.7e-06 K-1
ΔP_gF: -0.0037
climatic_resistance: 4.0

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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