Optical constants of CDGM - ZPK (Dense phosphate crown)
D-ZPK7-25
Wavelength:
µm
(0.280–2.400)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2-1=\frac{0.71411271λ^2}{λ^2-0.0133604289}+\frac{0.713400795λ^2}{λ^2-0.0028939123}+\frac{0.765480668λ^2}{λ^2-134.125223}$$Conditions & Spec sheet
n_is_absolute: false
wavelength_is_vacuum: false
temperature: 20.0 °C
thermal_dispersion:
- type: "Schott formula"
coefficients: -2.47e-05 -2.21e-09 5.2e-12 4.58e-07 5.69e-10 0.082
nd: 1.568540
Vd: 71.235367
glass_code: 569712
density: 4.36 g/cm3
thermal_expansion:
- temperature_range: -30 70 °C
coefficient: 1.33e-05 K-1
- temperature_range: 20 300 °C
coefficient: 1.58e-05 K-1
dPgF: 0.0199
climatic_resistance: 1.0
Comments
anneal rate:25°C/h
References
CDGM Zemax catalog 2022-06 (obtained from http://www.cdgmgd.com)
See also CDGM optical glass data sheets