Pentatope number: Difference between revisions
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A '''toroidal mirror''' is a form of [[parabolic reflector]] which has a different focal distance depending on the angle of the mirror. The curvature is actually that of an elliptic [[paraboloid]] with <math>a \ne b</math>. If the shape were that of a [[toroid]], the mirror would exhibit [[Aberration in optical systems|spherical aberration]]. | |||
Toroidal mirrors are used in [[Reflecting_telescope#Yolo | Yolo telescope]]s and optical [[monochromator]]s. In these devices, the source and detectors of the light are not located on the optic axis of the mirror, so the use of a true paraboloid of revolution would cause a distorted image. | |||
==See also== | |||
* [[List of telescope types]] | |||
==External links== | |||
* [http://bhs.broo.k12.wv.us/homepage/alumni/dstevick/erwin_c.htm Toroidal mirrors for Yolo telescopes] | |||
[[Category:Mirrors]] | |||
[[Category:Telescope types]] | |||
{{astronomy-stub}} | |||
{{optics-stub}} | |||
Revision as of 05:20, 16 November 2013
A toroidal mirror is a form of parabolic reflector which has a different focal distance depending on the angle of the mirror. The curvature is actually that of an elliptic paraboloid with . If the shape were that of a toroid, the mirror would exhibit spherical aberration.
Toroidal mirrors are used in Yolo telescopes and optical monochromators. In these devices, the source and detectors of the light are not located on the optic axis of the mirror, so the use of a true paraboloid of revolution would cause a distorted image.
See also
External links
26 yr old Radio Journalist Roman Crosser from Saint-Pascal, has many passions which include interior design, property developers housing in singapore singapore and rc model boats. Is a travel freak and these days made a vacation to Historic Centre of Ceský Krumlov. Template:Optics-stub