An achromatic lens or achromat is a lens that is designed to limit the effects of chromatic and spherical aberration. Achromatic lenses are corrected to...

“neutral colors”, also black or white Achromatic lens, a lens designed to minimize chromatic aberration Achromatic vision: Monochromacy (total color blindness)...

achromatic telescope is a refracting telescope that uses an achromatic lens to correct for chromatic aberration. When an image passes through a lens,...

many compound designs of achromatic lenses, designed to reduce color-related distortion (Chromatic aberration): Achromatic doublet (type) Littrow doublet...

central hole in the main mirror. The achromatic lens, which greatly reduced color aberrations in objective lenses and allowed for shorter and more functional...

an achromatic lens. But such simple lenses are not telephoto lenses, no matter how extreme the focal length – they are known as long-focus lenses. While...

superachromat or superachromatic lens was first conceived and developed by Maximilian Herzberger as the ultimate well-corrected lens. The color shift curve of...

wide-angle lens denotes a lens that has an image circle diameter approximately the same as the lens focal length Anastigmat is an achromatic lens used to...

correction is an achromatic lens, which uses a combination of crown glass and flint glass to bring two colors into focus. Achromatic objectives are a...

cost. It is often cheaper to AR-coat two air-spaced elements. Achromatic lens Triplet lens Clarkson, E. N. K.; Levi-Setti, R. L. (1975), "Trilobite eyes...

and spherical aberration if the lens is not aspheric. More common configurations use three or more elements for achromatic correction or apochromatic correction...

conventional, less expensive crown glass and flint glass elements to make an achromatic lens. Optical groups employ a combination of different types of glass; each...

5″) single-element lens. The next major step in the evolution of refracting telescopes was the invention of the achromatic lens, a lens with multiple elements...

convex lenses. It was not until 1840 that Chevalier in France introduced the achromatic lens formed by cementing a crown glass bi-convex lens to a flint...

more conventional lenses or achromatic doublets, or a long cylindrical gradient-index of refraction lens (a GRIN lens). Relay lenses operate by producing...

minimized by using an achromatic lens or achromat, in which materials with differing dispersion are assembled together to form a compound lens. The most common...

simple plano-convex or bi-convex lens, or sometimes a combination of lenses. With the development of the modern achromatic objective in 1829, by Joseph Jackson...

lens. Doublet (lens) Achromatic lens Apochromatic lens The five Seidel aberrations Mangin mirror "Triplets". spie.org. Retrieved 8 August 2018. "Lens...

showing no single-element lens could bring all colours to a focus. This led to the invention of the compound achromatic lens by Chester Moore Hall in England...

The Gauss lens is a compound achromatic lens that uses two uncemented elements; in its most basic form, a positive meniscus lens on the object side and...

produced lenses for both Niépce and Daguerre for their experiments in photography. In 1829[citation needed], Chevalier created an achromatic lens (a two-element...

2023-04-08. US Grant 3524697, Isshiki Masaki & Matsuki Keiji, "Achromatic super wide-angle lens", issued 18 August 1970, assigned to Nikon Corp.  Ohshita,...

which is not directly comparable because it uses a single element non-achromatic lens, and the short-lived Great Paris Exhibition Telescope of 1900. It used...

century. Great refractors were large refracting telescopes using achromatic lenses (as opposed to the mirrors of reflecting telescopes). They were often...

close-up lens, the diopter value is positive: the bigger the number, the greater the effective magnification. Higher quality achromatic lenses commonly...

Gauss lenses. Each Gauss lens is a two-element achromatic lens with a positive meniscus lens on the object side and a negative meniscus lens on the image...

similar problems, particularly with telescopes that use lenses rather than mirrors. Achromatic lenses are corrected to bring two wavelengths into focus in...

combined magnetic, electric quadrupole is achromatic around a given velocity. Bohr and Pauli claim that this lens leads to aberration when applied to ions...

1733 — Chester Moore Hall invents the achromatic lens. 1758 — John Dollond re-invents and patents the achromatic lens. 1783 — Jesse Ramsden invents his eponymous...

A corrective lens is a transmissive optical device that is worn on the eye to improve visual perception. The most common use is to treat refractive errors:...