Optical constants of HIKARI - SF (Dense flint)
E-SF11
Wavelength:
µm
(0.370–2.400)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2=3.05654935-0.0143159709λ^{2}+0.0381593027λ^{-2}+0.00315675913λ^{-4}-0.000223523385λ^{-6}+2.90021069\text{×}10^{-05}λ^{-8}$$Conditions & Spec sheet
temperature: 296 nd: 1.784723 Vd: 25.679481 glass_code: 785257 glass_status: preferred density: '3.22 g/cm3' thermal_expansion: - temperature_range: 243 343 coefficient: 1.0E-5 dPgF: 0.0146
References
NIKON Zemax catalog 2017-11 (obtained from http://www.nikon.com)
See also HIKARI glass data sheets
Data
INFO
SF11 optical glass
SF11 is a specialized type of optical glass with a high refractive index and a relatively low Abbe number, indicating higher dispersion properties. This glass type is particularly useful in optical systems where substantial light bending is required, such as in telephoto lenses, high-magnification microscopes, and other compact optical assemblies. However, the high level of dispersion associated with SF11 can result in chromatic aberration, where different wavelengths of light are focused at different points. To correct for this, SF11 is often combined with other glass types that have lower dispersion in complex lens systems, aiming to achieve balanced chromatic correction. Its unique properties make SF11 a popular choice in high-performance optics where both a high refractive index and specific dispersion characteristics are necessary. While SF11 is generally more expensive than more conventional optical glasses like BK7, its specialized attributes make it invaluable in advanced optical designs that demand high levels of performance.SF11 and similar glasses produced by different makers
Maker | Glass |
---|---|
Schott | N-SF11 |
Hikari | E-SF11 |
Sumita | K-SFLD11 |
CDGM | ZF13 |