Optical constants of SF5
ZF2 (CDGM)
Wavelength:
µm
(0.340–2.400)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2=2.70820441-0.00794171159λ^{2}+0.0292224783λ^{-2}+0.000884931615λ^{-4}+6.6862056\text{×}10^{-07}λ^{-6}+5.65902766\text{×}10^{-06}λ^{-8}$$Conditions & Spec sheet
temperature: 293
thermal_dispersion:
-
type: Schott formula
coefficients: 7.92e-07 2.05e-08 2.6e-11 1.28e-06 3.74e-10 0.232
nd: 1.672707
Vd: 32.180986
glass_code: 673322
glass_status: preferred
density: '4.08 g/cm3'
thermal_expansion:
-
temperature_range: 243 343
coefficient: 8.5E-6
-
temperature_range: 293 573
coefficient: 9.5E-6
dPgF: -0.0014
climatic_resistance: "1.0"
References
CDGM Zemax catalog 2022-06 (obtained from http://www.cdgmgd.com)
See also CDGM optical glass data sheets
Data
INFO
CDGM Glass Co., Ltd.
CDGM Glass Co., Ltd. is a leading manufacturer of optical glass based in China. The company offers a wide range of optical materials, including various types of crown and flint glasses, which are used in applications ranging from consumer electronics to advanced scientific instruments. Known for their capacity for large-scale production as well as their commitment to quality, CDGM has positioned itself as a major player in both domestic and international markets. Their optical glass products are often used in lenses, prisms, and other optical components that require high precision and reliability. With an extensive catalog that caters to different optical requirements, such as high refractive indices or low dispersion, CDGM serves a diverse clientele including manufacturers of microscopes, telescopes, cameras, and other high-precision optical equipment. The company's expertise in glass science and its ability to provide customized solutions have made it a go-to supplier for businesses seeking high-quality, reliable optical glass.External links
SF5 optical glass
SF5 is a type of optical glass characterized by its high refractive index and moderate to high dispersion, indicated by a lower Abbe number. This makes it particularly useful in applications where significant light bending capabilities are needed, such as in the design of compact lenses. However, the higher dispersion means that it tends to separate different wavelengths of light more than other types of glass, which can lead to chromatic aberration if not properly managed. To counteract this, SF5 is often paired with other types of optical glass in complex lens systems to optimize performance across a range of wavelengths. Common applications for SF5 glass include high-quality camera lenses, microscopes, and other optical instruments where precise image quality is paramount. Though it is generally more expensive than standard optical glasses like BK7, its specialized properties make SF5 a valuable resource for optical designers aiming to achieve superior optical performance.SF5 and similar glasses produced by different makers
| Maker | Glass |
|---|---|
| Schott | N-SF5 |
| Hikari | E-SF5 |
| HOYA | E-FD5 |
| Sumita | K-SFLD5 |
| CDGM | ZF2 |