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Optical constants of CDGM - LAK (Lanthanum crown)
H-LAK59A

Wavelength: µm
 (0.310 – 2.400)  
 

Complex refractive index (n+ik)[ i ]


n   k   LogX   LogY   eV

Derived optical constants

Dispersion formula [ i ]

$$n^2-1=\frac{1.63613242λ^2}{λ^2-0.00869769737}+\frac{0.169161636λ^2}{λ^2-0.0295057126}+\frac{0.929984618λ^2}{λ^2-82.4994109}$$

Conditions & Spec sheet

n_absolute: false
wavelength_vacuum: false
temperature: 20.0 ℃
thermal_dispersion:
  - type: "Schott formula"
    coefficients: -5.25e-06 1.39e-08 -3.66e-11 5.03e-07 5.22e-10 0.184
nd: 1.691000
Vd: 54.815309
glass_code: 691548
density: 3.94 g/cm3
thermal_expansion:
  - temperature_range: -30 70 ℃
    coefficient: 8.2e-06 K-1
  - temperature_range: 20 300 ℃
    coefficient: 9.6e-06 K-1
dPgF: -0.0052
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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