Topic
Parabolic reflector
About: Parabolic reflector is a research topic. Over the lifetime, 3375 publications have been published within this topic receiving 30735 citations. The topic is also known as: paraboloid reflector & paraboloidal reflector.
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TL;DR: In this article, a simple method to estimate the characteristic features of the radiation flux density distribution in the focal region of the concentrator system is presented, which can be used to design experiments to be carried out in a parabolic dish.
Abstract: In high temperature solar energy applications highly concentration optical systems, such as, e.g., parabolic dishes, achieve typical tradition flux densities {gt}2 MW/M{sup 2}. In order to investigate thermo and photochemical reactions at temperatures {gt}1500 K and radiation flux densities {gt}2 MW/m{sup 2} a solar furnace was built at Paul Scherrer Institute (PSI). This furnace is a two-stage concentrator. The first stage is a prefocusing glass heliostat with a focal length of 100 m. The second stage is an highly concentrating parabolic dish with a focal length of 1.93 m. To design experiments to be carried out in the focal region of the parabolic dish, the radiation flux as well as its density distribution have to be known. This distribution is usually measured by radiometric methods. However, these methods are generally rather troublesome because of the high temperatures involved. In this paper the authors present a simple method to estimate the characteristic features of the radiation flux density distribution in the focal region of the concentrator system.
35 citations
Patent•
27 Nov 1981TL;DR: In this paper, a system for the collection of electromagnetic radiation and the transmission of that radiation to a point of use is described. But this system is not suitable for the use with a large number of antennas.
Abstract: The present invention provides a system for the collection of electromagnetic radiation and the transmission of that radiation to a point of use. In its simplest sense, an apparatus for the collection and transmission of electromagnetic radiation comprises a cylindrical fluorescent fiber, at least one end of which is optically coupled to an optical wave guide, and means for reflecting solar radiation impinging over a relatively wide area onto said cylindrical fluorescent fiber. Preferably, a compound parabolic mirror is employed for reflecting incident solar radiation onto the optical fluorescent fiber.
35 citations
Patent•
18 May 2001
TL;DR: In this article, a parabolic mirror is used for concentrating solar energy system, with a lower edge at least essentially directly adjacent to the support plane, which is either straight or slightly curved in plan.
Abstract: The invention relates to a concentrating solar energy system, comprising a reflector (10) in the form of a parabolic mirror, guided in two axes, supported on a base frame (14), arranged in a support plane and a receiver (62) arranged for operation at the focal point (110) of the parabolic mirror, whereby the parabolic mirror may also be rotated about an axis (36) essentially perpendicular to the support plane The invention is characterised in that the parabolic mirror, during operation, has a lower edge (12) at least essentially directly adjacent to the support plane, which is either straight or slightly curved in plan The parabolic mirror (10) may be tilted up and down about a tilting axis (36), arranged in the region of the lower edge (12) thereof, at least essentially parallel to the support plane and which may be linearly moved on the base frame (14)
35 citations
TL;DR: In this paper, a study of the resonant or normal modes of optic and quasi-optic interferometer cavities with plane-parallel end reflectors is made, and the solution of the integral equation governing the relation between the normal modes and the geometry of the cavity is found by means of a series expansion of orthogonal functions.
Abstract: A study is made of the resonant or normal modes of optic and quasioptic interferometer cavities with plane–parallel end reflectors. The solution of the integral equation governing the relation between the normal modes and the geometry of the cavity is found by means of a series expansion of orthogonal functions. The terms of the series for the normal modes can be interpreted as Fraunhofer diffraction patterns characteristic of the geometry of the end reflectors. Various geometries, such as the infinite-strip, rectangular, and circular end reflector cavities, are considered and the results plotted and interpreted.
35 citations
01 Jul 1976
TL;DR: In this article, the authors present in some detail the various significant factors which influence the design of parabolic-cylindrical solar collectors, and present a survey of the most important factors.
Abstract: This report presents in some detail the various significant factors which influence the design of parabolic-cylindrical solar collectors.
35 citations