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Optical constants of CDGM - LAF (Lanthanum flint)
D-LAF53-25

Wavelength: µm
 (0.290 – 2.400)  
 

Complex refractive index (n+ik)[ i ]


n   k   LogX   LogY   eV

Derived optical constants

Dispersion formula [ i ]

$$n^2-1=\frac{1.32239317λ^2}{λ^2-0.00606224219}+\frac{0.646347208λ^2}{λ^2-0.0234824415}+\frac{1.17507569λ^2}{λ^2-87.8164211}$$

Conditions & Spec sheet

n_absolute: false
wavelength_vacuum: false
temperature: 20.0 ℃
thermal_dispersion:
  - type: "Schott formula"
    coefficients: 7.67e-06 2.36e-08 -1.95e-10 6.35e-07 3.67e-10 0.208
nd: 1.742100
Vd: 49.246024
glass_code: 742493
density: 4.26 g/cm3
thermal_expansion:
  - temperature_range: -30 70 ℃
    coefficient: 5.6e-06 K-1
  - temperature_range: 20 300 ℃
    coefficient: 7.2e-06 K-1
dPgF: -0.009
climatic_resistance: 1.0

Comments

anneal rate:25℃/h

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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