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Optical constants of CDGM - LAK (Lanthanum crown)
H-LAK51A

Wavelength: µm
 (0.280 – 2.400)  
 

Complex refractive index (n+ik)[ i ]


n   k   LogX   LogY   eV

Derived optical constants

Dispersion formula [ i ]

$$n^2-1=\frac{0.639398694λ^2}{λ^2-5.67124825\text{×}10^{-05}}+\frac{1.18748481λ^2}{λ^2-0.0158001968}+\frac{1.26545352λ^2}{λ^2-91.097053}$$

Conditions & Spec sheet

n_absolute: false
wavelength_vacuum: false
temperature: 20.0 ℃
thermal_dispersion:
  - type: "Schott formula"
    coefficients: 8.08e-08 1.25e-08 -7.7e-12 4.99e-07 6.1e-10 0.161
nd: 1.696800
Vd: 55.526357
glass_code: 697555
glass_status: standard
density: 3.56 g/cm3
thermal_expansion:
  - temperature_range: -30 70 ℃
    coefficient: 6.3e-06 K-1
  - temperature_range: 20 300 ℃
    coefficient: 8.1e-06 K-1
dPgF: -0.007
climatic_resistance: 1.0

References

CDGM Zemax catalog 2022-06 (obtained from http://www.cdgmgd.com)
See also CDGM optical glass data sheets

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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