Mangin mirror: Difference between revisions
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==Applications== |
==Applications== |
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Mangin mirrors are used in illumination and [[image-forming optical system|image forming optics]] such as [[search light]]s, [[headlamp]]s, [[Sight (device)#Aircraft gunsights|aircraft gunsight]]s and [[head-mounted display]]s. Many [[Catadioptric system#Catadioptric telescopes|Catadioptric telescopes]] use negative lenses with a reflective coating on the backside that are referred to as "''mangin mirrors''", although they are not single element objectives like the original mangin and some, like the Hamiltonian telescope, predate the mangins invention by over 60 years.<ref>[http://www.telescope-optics.net/catadioptric_telescopes.htm - Vladimir Sacek, telescope-ptics.net, Notes on AMATEUR TELESCOPE OPTICS, CATADIOPTRIC TELESCOPES, 10.2.1]</ref> Catadioptric mirrors similar to the mangin are found in the [[Klevtsov-Cassegrain telescope|Klevtsov-Cassegrain]], [[Argunov-Cassegrain telescope|Argunov-Cassegrain]] telescopes, and [[Ludwig Schupmann]]s [[Schupmann medial telescope]].<ref name = "Sacek11_1_2">{{cite web| last = Sacek| first = Vladimir| authorlink = | coauthors = | title = 11.1.2. Schupmann "medial" telescope| work = Telescope Optics| publisher = Vladimir Sacek| date = 2006-07-14| url = http://www.telescope-optics.net/schupmann_medial_telescope.htm| format = html| doi =| accessdate = 2009-07-5}}</ref> |
Mangin mirrors are used in illumination and [[image-forming optical system|image forming optics]] such as [[search light]]s, [[headlamp]]s, [[Sight (device)#Aircraft gunsights|aircraft gunsight]]s and [[head-mounted display]]s. Many [[Catadioptric system#Catadioptric telescopes|Catadioptric telescopes]] use negative lenses with a reflective coating on the backside that are referred to as "''mangin mirrors''", although they are not single element objectives like the original mangin and some, like the Hamiltonian telescope, predate the mangins invention by over 60 years.<ref>[http://www.telescope-optics.net/catadioptric_telescopes.htm - Vladimir Sacek, telescope-ptics.net, Notes on AMATEUR TELESCOPE OPTICS, CATADIOPTRIC TELESCOPES, 10.2.1]</ref> Catadioptric mirrors similar to the mangin are found in the [[Klevtsov-Cassegrain telescope|Klevtsov-Cassegrain]], [[Argunov-Cassegrain telescope|Argunov-Cassegrain]] telescopes, and [[Ludwig Schupmann]]'s [[Schupmann medial telescope]].<ref name = "Sacek11_1_2">{{cite web| last = Sacek| first = Vladimir| authorlink = | coauthors = | title = 11.1.2. Schupmann "medial" telescope| work = Telescope Optics| publisher = Vladimir Sacek| date = 2006-07-14| url = http://www.telescope-optics.net/schupmann_medial_telescope.htm| format = html| doi =| accessdate = 2009-07-5}}</ref> |
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==Notes== |
==Notes== |
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Revision as of 20:44, 25 August 2009
In optics, a Mangin mirror is a catadioptric concave curved mirror with the reflective surface on the rear side of the glass designed to reflect light without spherical aberration.
Description
The mangin mirror's construction consists of a concave (negative meniscus) lens with spherical surfaces of different radii with the reflective coating on the shallower rear surface. The spherical aberration normally produced by the simple spherical mirror surface is canceled out by the opposite spherical aberration produced by the light traveling the negative lens front surface. Since light passes through the glass twice, the over all system acts like a triplet lens.[1] They were invented inn 1876 a French engineer, A. Mangin, as a substitute for the more difficult to manufacture parabolic reflecting mirror for use in searchlights. Since the catadioptric design eliminated most of the off axis aberration found in parabolic mirrors, mangin mirrors had the added advantage of producing a nearly true parallel beam of light.
Applications
Mangin mirrors are used in illumination and image forming optics such as search lights, headlamps, aircraft gunsights and head-mounted displays. Many Catadioptric telescopes use negative lenses with a reflective coating on the backside that are referred to as "mangin mirrors", although they are not single element objectives like the original mangin and some, like the Hamiltonian telescope, predate the mangins invention by over 60 years.[2] Catadioptric mirrors similar to the mangin are found in the Klevtsov-Cassegrain, Argunov-Cassegrain telescopes, and Ludwig Schupmann's Schupmann medial telescope.[3]
Notes
- ^ Optical design fundamentals for infrared systems By Max J. Riedl
- ^ - Vladimir Sacek, telescope-ptics.net, Notes on AMATEUR TELESCOPE OPTICS, CATADIOPTRIC TELESCOPES, 10.2.1
- ^ Sacek, Vladimir (2006-07-14). "11.1.2. Schupmann "medial" telescope" (html). Telescope Optics. Vladimir Sacek. Retrieved 2009-07-5.
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