Formation of a Silver Mirror on a Glass Surface - silver plated mirror

 2024-08-03 11:21:26

Abbe

The following table lists standard wavelengths at which n is usually determined, indicated by subscripts. For example, nD is measured at 589.3 nm:

Crown glass

Achromat

where nd, nF and nC are the refractive indices of the material at the wavelengths of the Fraunhofer d-, F- and C- spectral lines (587.6 nm, 486.1 nm and 656.3 nm respectively).

Abbe numbers are used to calculate the necessary focal lengths of achromatic doublet lenses to minimize chromatic aberration.

which defines the Abbe number with respect to the yellow Fraunhofer d (or D3) helium line at 587.5618 nm wavelength. It can also be defined at the green mercury E-line at 546.073 nm:

Refractive index

iCoat anti-reflective coatings are formulated using unique and proprietary chemical compositions, combined with a premium bonding layer for powerful adhesion to the lens substrates. Icoat AR coatings address various optical lens related complaints such as distracting glare and halo effects, cleanability and scratch resistance. All iCoat anti-reflective coatings combine ion-impacted static-neutral coating technology with ultra tough chemical layers that are virtually impervious to wear and tear. All anti-reflective coating processes takes place in a cutting edge vacuum chamber that ensures precise control of all parameters of the coating layers. The result is a dense and smooth lens surface with glare-free properties, making your lenses impermeable to static, scratches, solvents and chemicals.With iCoats anti-reflective coatings your lenses appear thinner and your eyes look more natural.

阿贝常数

Abbe numbers are used to classify glass and other optically transparent materials. For example, flint glass has V<50 and crown glass has V>50. Typical values of V range from around 20 for very dense flint glass, around 30 for polycarbonate plastics, and up to 65 for very light crown glass, and up to 85 for fluor-crown glass. Abbe numbers are only a useful measure of dispersion for visible light, and for other wavelengths, or for higher precision work, the group velocity dispersion is used.

Dispersionabbe

In physics and optics, the Abbe number, also known as the V-number or constringence of a transparent material, is a measure of the material's dispersion (variation of refractive index with wavelength) in relation to the refractive index, with high values of V indicating low dispersion (low chromatic aberration). It is named after Ernst Abbe (1840â1905), the German physicist who defined it.

An Abbe diagram is produced by plotting the Abbe number Vd of a material versus its refractive index nd. Glass can then be categorised by their composition and position on the diagram. This can be a letter-number code, as used in the CGGlass catalogue, or a 6-digit glass code.

Note: * Backside UV reflection protection is available on selected coatings – Stainless LUV, Ice and Fusion Ice ** Blue-violet light filtering technology is available on selected coatings – Indigo HD and Indigo