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Optical constants of CDGM - LAK (Lanthanum crown)
H-LAK5A

Wavelength: µm
 (0.290 – 2.400)  
 

Complex refractive index (n+ik)[ i ]


n   k   LogX   LogY   eV

Derived optical constants

Dispersion formula [ i ]

$$n^2-1=\frac{1.54437415λ^2}{λ^2-0.00815901025}+\frac{1.00066972λ^2}{λ^2-88.9110754}+\frac{0.219123775λ^2}{λ^2-0.0267011064}$$

Conditions & Spec sheet

n_absolute: false
wavelength_vacuum: false
temperature: 20.0 ℃
thermal_dispersion:
  - type: "Schott formula"
    coefficients: -4.1e-06 1.07e-08 -1.69e-11 5.87e-07 1.27e-09 0.095
nd: 1.677900
Vd: 55.514970
glass_code: 678555
density: 3.8 g/cm3
thermal_expansion:
  - temperature_range: -30 70 ℃
    coefficient: 8e-06 K-1
  - temperature_range: 20 300 ℃
    coefficient: 9.4e-06 K-1
dPgF: -0.0049
climatic_resistance: 2.0

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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