lens vertex

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• Vertex — (Latin: corner; plural vertices or vertexes) may refer to:Mathematics*Vertex (geometry), a corner point of a polygon, polyhedron, tesselation, etc. *Vertex (graph theory), a node in a graph *Vertex (curve), a local extreme point of curvature… …   Wikipedia

• vertex — [vʉr′teks΄] n. pl. vertexes or vertices [vʉr′tə sēz΄] [L, the top, properly the turning point < vertere, to turn: see VERSE] 1. the highest point; summit; apex, as the top point of the sun, moon, etc. above the horizon 2. Anat. Zool. the top… …   English World dictionary

• Lens clock — A lens clock is a mechanical dial caliper that is used to measure dioptric power of a lens. It is a specialized version of a spherometer. A lens clock measures the curvature of a surface, but gives the result in diopters, assuming the lens is… …   Wikipedia

• Vertex (curve) — In the geometry of curves a vertex is a point of where the first derivative of curvature is zero. This is typically a local maximum or minimum of curvature. Other special cases may occur, for instance when the second derivative is also zero, or… …   Wikipedia

• Axis of a lens — Axis Ax is, n.; pl. {Axes}. [L. axis axis, axle. See {Axle}.] A straight line, real or imaginary, passing through a body, on which it revolves, or may be supposed to revolve; a line passing through a body or system around which the parts are… …   The Collaborative International Dictionary of English

• Hyperbola — This article is about a geometrical curve, a conic section. For the term used in rhetoric, see Hyperbole …   Wikipedia

• List of optometric abbreviations — Contents 1 Eye Examination Terms 2 Clinical Conditions Terms 3 Contact Lens Terms 4 Pharmacy and Drug Terms …   Wikipedia

• Focal length — The focal length of an optical system is a measure of how strongly it converges (focuses) or diverges (diffuses) light. A system with a shorter focal length has greater optical power than one with a long focal length. Thin lens approximation For… …   Wikipedia

• Radius of curvature (optics) — Radius of curvature has specific meaning and sign convention in optical design. A spherical lens or mirror surface has a center of curvature located in (x, y, z) either along or decentered from the system local optical axis. The vertex… …   Wikipedia

• telescope — /tel euh skohp /, n., adj., v., telescoped, telescoping. n. 1. an optical instrument for making distant objects appear larger and therefore nearer. One of the two principal forms (refracting telescope) consists essentially of an objective lens… …   Universalium

• Fragment-Shader — Pixel Shader (auch Pixelshader, Fragment Shader, Abk. PS) sind Programme, die vom Grafikprozessor einer 3D Grafikkarte im Verlauf der Grafikpipeline (in den sogenannten Shadereinheiten) ausgeführt werden. Häufig werden auch die Shadereinheiten… …   Deutsch Wikipedia