achromatic point
1achromatic threshold — the least intensity of the spectrum that produces a sensation of color; reduction of intensity below this point produces a sensation of brightness only, without any color distinction …
2achromatic lens — ach′romat′ic lens′ n. opt a system of two or more lenses made of different substances so that different colors are focused at the same point, eliminating chromatic aberration • Etymology: 1860–65 …
3colour — /kul euhr/, n., adj. v.t., v.i. Chiefly Brit. color. Usage. See or1. * * * I Aspect of any object that may be described in terms of hue, brightness, and saturation. It is associated with the visible wavelengths of electromagnetic radiation, which …
4tristimulus system — ▪ colour a system for visually matching a colour under standardized conditions against the three primary colours red, green, and blue; the three results are expressed as X, Y, and Z, respectively, and are called tristimulus values. For… …
5Mark Moebius — (* 8. September 1973 in Summit, New Jersey, USA) ist ein deutscher Komponist. Inhaltsverzeichnis 1 Leben 2 Stipendien und Auszeichnungen 3 Werke …
6Optical aberration — v · d · e Optical aberration …
7Eyepiece — For the device for looking through a camera, see viewfinder. A collection of different types of eyepieces. An eyepiece, or ocular lens, is a type of lens that is attached to a variety of optical devices such as telescopes and microscopes. It is… …
8Chromatic aberration — On top is corner detail in a photograph taken with a higher quality lens; bottom is a similar photograph taken with a wide angle lens showing severe visible lateral chromatic aberration. The effect is pronounced on the right side of the building… …
9Variations of gray — Main article: Gray shades of gray redirects here. For other uses, see shades of gray (disambiguation). There are many tints and shades of the color gray. A selection of these various colors are shown below. Gray/Grey …
10microscope — /muy kreuh skohp /, n. 1. an optical instrument having a magnifying lens or a combination of lenses for inspecting objects too small to be seen or too small to be seen distinctly and in detail by the unaided eye. 2. (cap.) Astron. the… …
