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Optical constants of CDGM - K (Crown)
K4A

Wavelength: µm
 (0.320–2.400)  
 

Complex refractive index (n+ik)[ i ]


n   k   LogX   LogY   eV

Derived optical constants

Dispersion formula [ i ]

$$n^2-1=\frac{0.749532263λ^2}{λ^2-0.0148033503}+\frac{0.494866234λ^2}{λ^2+0.000264092219}+\frac{0.96016866λ^2}{λ^2-95.7190154}$$

Conditions & Spec sheet

n_absolute: false
wavelength_vacuum: false
temperature: 20.0 ℃
thermal_dispersion:
  - type: "Schott formula"
    coefficients: 7.37e-06 2.2e-08 -6.81e-12 4.56e-07 4.32e-10 0.199
nd: 1.508020
Vd: 61.052897
glass_code: 508611
density: 2.43 g/cm3
thermal_expansion:
  - temperature_range: -30 70 ℃
    coefficient: 4.7e-06 K-1
  - temperature_range: 20 300 ℃
    coefficient: 5.2e-06 K-1
dPgF: -0.0028
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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