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Optical constants of CDGM - FK (Fluor crown)
D-FK61-25

Wavelength: µm
 (0.280 – 2.400)  
 

Complex refractive index (n+ik)[ i ]


n   k   LogX   LogY   eV

Derived optical constants

Dispersion formula [ i ]

$$n^2-1=\frac{0.894432499λ^2}{λ^2-0.00436678978}+\frac{0.321652123λ^2}{λ^2-0.0141909741}+\frac{0.748704285λ^2}{λ^2-149.771388}$$

Conditions & Spec sheet

n_absolute: false
wavelength_vacuum: false
temperature: 20.0 ℃
thermal_dispersion:
  - type: "Schott formula"
    coefficients: -2.45e-05 -2.09e-09 -6.72e-13 3.69e-07 2.37e-10 0.173
nd: 1.496530
Vd: 81.531772
glass_code: 497815
density: 3.9 g/cm3
thermal_expansion:
  - temperature_range: -30 70 ℃
    coefficient: 1.45e-05 K-1
  - temperature_range: 20 300 ℃
    coefficient: 1.7e-05 K-1
dPgF: 0.0321
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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