circle of least confusion

the smallest cross section in a beam of paraxial rays, lying in the plane of least spherical aberration.
[1865-70]

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Universalium. 2010.

Look at other dictionaries:

  • circle of least confusion — physics : the minimum cross section of a symmetrical bundle of rays that have no common focus because of spherical aberration * * * Optics. the smallest cross section in a beam of paraxial rays, lying in the plane of least spherical aberration.… …   Useful english dictionary

  • Circle of confusion — For the closely related topic in microscopy, see Point spread function. In optics, a circle of confusion is an optical spot caused by a cone of light rays from a lens not coming to a perfect focus when imaging a point source. It is also known as… …   Wikipedia

  • circle of confusion — the indistinct circular patch formed by a lens representing the out of focus image of a single object point called also blur circle; compare circle of least confusion * * * Photog. a circular spot on a film, resulting from the degree to which a… …   Useful english dictionary

  • circle — 1. [TA] In anatomy, a ring shaped structure or group of structures, as formed by anastomosing arteries or veins, or by connected (communicating) nerves, 2. A line or process with every point approximately equidistant from the center. SYN:… …   Medical dictionary

  • Tonnele Circle — The Tonnele Circle (pronounced tunnel ee or tawn uh lee ) is an intersection in Jersey City, New Jersey, United States. It is named after Tonnele Avenue, the north south road that runs through it. Entrances and exits are, listed clockwise from… …   Wikipedia

  • Solf Circle — The Solf Circle ( de. Solf Kreis) was an informal gathering of German intellectuals involved in the resistance against Nazi Germany. Most members were arrested and executed after attending a tea party held near Heidelberg on September 10, 1943,… …   Wikipedia

  • Optical aberration — v · d · e Optical aberration …   Wikipedia

  • aberration — aberrational, adj. /ab euh ray sheuhn/, n. 1. the act of departing from the right, normal, or usual course. 2. the act of deviating from the ordinary, usual, or normal type. 3. deviation from truth or moral rectitude. 4. mental irregularity or… …   Universalium

  • Chromatic 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… …   Wikipedia

  • Astigmatism — An optical system with astigmatism is one where rays that propagate in two perpendicular planes have different foci. If an optical system with astigmatism is used to form an image of a cross, the vertical and horizontal lines will be in sharp… …   Wikipedia

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