A toroidal mirror is a reflector whose surface is a section of a torus, defined by two radii of curvature.[1] Such reflectors are easier to manufacture than mirrors with a surface described by a paraboloid or ellipsoid. They suffer from spherical aberration and coma, but do not suffer from astigmatism like a spherical mirror when used in an off-axis geometry, provided the angle of incidence is matched to the design angle. Because they are easier to manufacture, they are much cheaper than ellipsoidal or paraboloidal mirrors for the same surface quality.
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 optical axis of the mirror, so the use of a true paraboloid of revolution would cause a distorted image.
^Rappaport, Carey (13 April 2015). "Multistatic nearfield imaging radar for portal security systems using a high gain toroidal reflector antenna". 2015 9th European Conference on Antennas and Propagation (EuCAP) – via IEEE.
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A toroidal mirror is a reflector whose surface is a section of a torus, defined by two radii of curvature. Such reflectors are easier to manufacture than...
Look up toroidal in Wiktionary, the free dictionary. Toroidal describes something which resembles or relates to a torus or toroid: Torus Toroid, a surface...
produced by rotation Parabolic antenna Parabolic trough Solar furnace Toroidalreflector The closeness of this number to the value of "e", the base of natural...
parabolic reflector can do a better job. Such a mirror can focus incoming parallel rays to a much smaller spot than a spherical mirror can. A toroidal reflector...
telescopes can be classified by three primary optical designs (refractor, reflector, or catadioptric), by sub-designs of these types, by how they are constructed...
polishing a toroidal figure into the secondary. Like Schiefspieglers, many Yolo variations have been pursued. The needed amount of toroidal shape can be...
by 1 February 1825. However, due to the difficulty of fabricating large toroidal prisms, this apparatus had a 16-sided polygonal plan. In 1825 Fresnel extended...
cells are usually handled with periodic boundary conditions resulting in a toroidal arrangement: when one goes off the top, one comes in at the corresponding...
impedance transformation. This is usually wound on a ferrite toroidal core. The toroid core material must be suitable for the frequency of use, and in...
which tapered down more towards the grill and were fitted with improved reflectors, the grill (which was longer on the Spec 1), the hood which had a re-shaped...
Stanford torus. Three concepts were presented to NASA: the Bernal Sphere, the Toroidal Colony and the Cylindrical Colony. O'Neill's concepts had an example of...
The shape of an electrical network, independent of its size or values. toroidal inductors and transformers Magnetic coils wound around a ring of ferromagnetic...
retro reflective materials of either embedded lens elements or prismatic reflectors laminated into recesses on the flat surfaces and the vertical edge of...
power supply passes through wires that are wrapped in a coil around a toroidal ferrite core placed around the outside of a portion of the glass tube....
(W4PA) (20 May 2007) [5 June 1998]. "'L' network vs. 'T' network". Ten-Tec Reflector. Sevierville, TN: Ten-Tec, Inc. Archived from the original on 15 April...
adapted to focus one target satellite to a single point), the toroidal antenna uses a reflector pair to focus multiple signals to a line. Individual adjacent...
worked on the problem of plasma physics. With Tihiro Ohkawa he invented toroidal devices for containing the plasma with magnetic fields. Their devices were...
Terminology for high-voltage direct current (HVDC) transmission IEC 60635 Toroidal strip-wound cores made of magnetically soft material IEC 60636 Flexible...
liquid-core design which uses rapid circulation of the fluid to create a toroidal pocket of gaseous uranium fuel in the middle of the reactor, surrounded...
peering is typically technically instantiated in a route server or route reflector (which differ from looking glasses in that they serve routes back out...
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