Topic
Reflector (antenna)
About: Reflector (antenna) is a research topic. Over the lifetime, 28730 publications have been published within this topic receiving 212618 citations.
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Patent•
28 Nov 2000
TL;DR: In this paper, a wall switch and lamp assembly is constructed to include a lamp circuit and reflector unit covered on the wall, and an intermediate light-penetrable panel having a center opening, which receives the shell of the push-button switch of the wall switch unit.
Abstract: A wall switch and lamp assembly is constructed to include a lamp circuit and reflector unit covered on the wall. A wall switch unit is fastened to the wall to hold down the lamp circuit and reflector unit, and an intermediate light-penetrable panel is retained between the lamp circuit and reflector unit and the wall switch unit. The intermediate light-penetrable panel having a center opening, which receives the shell of the push-button switch of the wall switch unit. The lamp circuit and reflector unit include a circuit board having a set of LEDs. A light guide panel is adapted to receive the circuit board and to reflect the light of the LEDs through the intermediate light-penetrable panel.
66 citations
TL;DR: The Lunokhod 1 reflector as discussed by the authors was used for the first time in 2010 when images from the LRO provided a positive identification of the rover and determined its coordinates with uncertainties of about 100m.
66 citations
Patent•
16 Feb 1973
TL;DR: The reflector is constructed of transparent material and has on its rear face a plurality of first and second retrodirective reflector elements, arranged at a different angle than the optical axes of the second reflector element as discussed by the authors.
Abstract: The reflector is constructed of transparent material and has on its rear face a plurality of first and second retrodirective reflector elements. The optical axes of the first reflector elements are arranged at a different angle than the optical axes of the second reflector elements. The first and second reflector elements are interspersed with each other so that the reflector appears substantially fully illuminated throughout its area to a viewer who is located within a zone defined by the optical axes.
66 citations
TL;DR: In this article, the angular distributions of the average sizes, the velocities, and the molecular intensities of the reflected cluster beams are analyzed for high and low-temperature reflection of clusters.
Abstract: Clusters of helium, hydrogen, and nitrogen are reflected at a polished stainless steel plate at temperatures ranging from 80 to 550 K. The incident clusters contain on the average about 1.5×105 atoms of helium or molecules of hydrogen or 104 molecules of nitrogen, as measured by time‐of‐flight mass spectrometry. The angular distributions of the average sizes, the velocities, and the molecular intensities of the reflected cluster beams show that in the investigated range of reflector temperatures the reflection of the helium clusters corresponds to the hydrogen cluster reflection at higher reflector temperatures while the nitrogen cluster reflection corresponds to the hydrogen cluster reflection at lower reflector temperatures. The transition between the two regimes of reflection as observed with hydrogen clusters is marked by an optimum reflector temperature leading to a maximum intensity of the reflected beam, a minimum loss of clustered material, and a distinct angular separation of incident cluster sizes. At a grazing incidence angle of 84.3° the measured optimum reflector temperature for the hydrogen cluster reflection is 215 K and increases with decreasing angle of incidence. The two regimes of high‐temperature and low‐temperature reflection of clusters exhibit close phenomenological relationship to the regimes of thermal and structure dominated scattering of atoms from single crystal planes. In both cases the transition region is characterized by a maximum angle of reflection and a minimum divergence of the reflected beam. The features of high‐temperature cluster reflection are explained by a semiempirical model based on the evaporation recoil of the cluster molecules ablating after contact with the comparatively hot reflector surface.
65 citations
Patent•
20 Jul 2000
TL;DR: In this paper, the position of an object is determined by means of a laser-tracker with an interferometer and a retroreflector in the form of a triple prism or a triple mirror for parallel reflection of the laser beam (5) directed so as to impinge upon said reflector (3), on the basis of measurement data relating to the direction and optical path of said laser beam.
Abstract: The position of an object is determined by means of a laser-tracker (1) with an interferometer and a retroreflector (3) in the form of a triple prism or a triple mirror for parallel reflection of the laser beam (5) directed so as to impinge upon said reflector (3), on the basis of measurement data relating to the direction and optical path of said laser beam (5). Additional data relating to the angle of incidence (α) of said laser beam (5) in the reflector (3) and/or to a variable orientation of the reflector (3) in relation to the object (2) is determined on the basis of measurement data relating to the direction and optical path of the laser beam (5) and of said additional data. The additional data is also used to correct data derived from the direction measurement and the interferometric measurement concerning the angle of incidence (α) through cancellation of the dependence on said angle of incidence. To allow the measurement of the angle of incidence (α), the reflector (3) is designed so that a central part of the laser beam (5) penetrates said reflector (3) without being reflected and reaches a position sensor (12) placed in a fixed position behind the reflector (3) while a peripheral part of the laser beam (5) is reflected in a parallel manner and is used for the interferometric measurement.
65 citations