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Optical constants of CDGM - LAK (Lanthanum crown)
H-LAK4L

Wavelength: µm
 (0.280 – 2.400)  
 

Complex refractive index (n+ik)[ i ]


n   k   LogX   LogY   eV

Derived optical constants

Dispersion formula [ i ]

$$n^2-1=\frac{0.402312889λ^2}{λ^2+0.00267679247}+\frac{1.24575177λ^2}{λ^2-0.013171611}+\frac{1.28904431λ^2}{λ^2-93.3654804}$$

Conditions & Spec sheet

n_absolute: false
wavelength_vacuum: false
temperature: 20.0 ℃
thermal_dispersion:
  - type: "Schott formula"
    coefficients: 1.06e-06 1.84e-08 -7.4e-11 2.79e-07 6.19e-10 0.275
nd: 1.640000
Vd: 60.202769
glass_code: 640602
density: 2.99 g/cm3
thermal_expansion:
  - temperature_range: -30 70 ℃
    coefficient: 6e-06 K-1
  - temperature_range: 20 300 ℃
    coefficient: 7.8e-06 K-1
dPgF: -0.006
climatic_resistance: 3.0

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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