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Optical constants of CDGM - FK (Fluor crown)
D-FK61A-25

Wavelength: µm
 (0.290 – 2.400)  
 

Complex refractive index (n+ik)[ i ]


n   k   LogX   LogY   eV

Derived optical constants

Dispersion formula [ i ]

$$n^2-1=\frac{0.714581002λ^2}{λ^2-0.0108378966}+\frac{0.502174967λ^2}{λ^2-0.00132310137}+\frac{0.838296164λ^2}{λ^2-153.775939}$$

Conditions & Spec sheet

n_absolute: false
wavelength_vacuum: false
temperature: 20.0 ℃
thermal_dispersion:
  - type: "Schott formula"
    coefficients: -1.94e-05 2.54e-09 -2.83e-11 3.05e-07 -9.31e-11 0.242
nd: 1.496650
Vd: 81.549116
glass_code: 497816
glass_status: standard
density: 3.68 g/cm3
thermal_expansion:
  - temperature_range: -30 70 ℃
    coefficient: 1.26e-05 K-1
  - temperature_range: 20 300 ℃
    coefficient: 1.55e-05 K-1
dPgF: 0.0309
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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