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Radiant energy collecting apparatus.

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TLDR
A radiant energy collecting apparatus for collecting and concentrating solar energy having a primary parabolic reflector (16) which focuses the sun's rays on a focal line (18) and has a principle axis (17) passing through the focal line and a secondary concentrating assembly (20) located adjacent the primary reflector.
Abstract
A radiant energy collecting apparatus (11) for collecting and concentrating solar energy having a primary parabolic reflector (16) which focuses the sun's rays on a focal line (18) and has a principle axis (17) passing through the focal line (18) and a secondary concentrating assembly (20) located adjacent the focal line (17) of the primary reflector (16). The secondary concentrating assembly (20) includes a pair of planar reflectors (26) arranged on opposite sides of the principle axis (17) of the primary reflector (16) and a series of secondary parabolic reflectors (28) between the planar reflectors (26), the secondary parabolic reflectors (28) having focal lines (29) which extend normal to the planar reflectors (26) and to the principle axis (17) of the primary reflector (16). The secondary reflectors (28) are mounted for rotation about their focal lines (29) and concentrate energy on targets (42) extending along their focal lines (29).

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Citations
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Patent

Solar energy plant

TL;DR: A solar radiation concentrating system (1) comprises at least two reflectors (12, 16) successively arranged along an optical path (4) of the system, so that a first (12) reflector reflects the radiation towards a second (16) reflectors.
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Solar collection system

TL;DR: In this paper, a solar tracking mechanism is utilized in connection with a solar energy collection system, which includes a light reflective shell shaped to focus solar radiation on a radiation absorbing segment of a tube which carries a heat transfer fluid.
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Systems for cost-effective concentration and utilization of solar energy

TL;DR: In this article, a cost-effective system for using large reflective elements that track the sun on two axes to concentrate solar energy onto a receiver that can convert the sun's optical energy to a form usable for extensive displacement of combustion of fossil fuels is presented.
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Solar energy collector system

David Mills
TL;DR: In this article, a solar energy collector system with n groups of arrayed reflectors (15) and n + 1 target receiver systems (10, 11, 12) is described, in which a majority at least of the reflectors within each group (13, 14) are arranged to be driven simultaneously to pivot through the same angle.
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Double reflecting solar concentrator

Scott Frazier
TL;DR: In this article, a double reflecting solar concentrator was used to reflect incident light toward a secondary surface, where the incident light reflected off the secondary surface 124b away from the primary surface's natural focus point towards a secondary focal point positioned on or substantially near the surface of the primary reflective surface.
References
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Patent

Solar energy collection

TL;DR: In this paper, the authors present an approach and methods for concentrating and collecting solar energy, where solar energy is concentrated by refringent lenses or lens systems including fluid lenses and/or Fresnel-type lenses.
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Point focus solar concentrator using reflector strips of various geometries to form primary and secondary reflectors

TL;DR: A point focus solar concentrator as mentioned in this paper uses various geometries of cylindrical reflector strips some of which are tilted to simulate a point focus by overlaying the line focii of each segment at a coincident point.
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Solar energy collection system

TL;DR: In this paper, a fixed, linear, ground-based primary reflector having an extended curved sawtooth-contoured surface covered with a metalized polymeric reflecting material, reflects solar energy to a movably supported collector that is kept at the concentrated line focus of the reflector primary.
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Collection of solar energy

TL;DR: In this paper, the authors present an approach for collecting solar energy which consists of one or more solar energy collectors attached to a frame which floats on a pool of water, and means for orienting the frame relative to the azimuthal direction of the sun.
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Solar energy collection

TL;DR: In this paper, a concentrating solar energy system is described, which consists of an elongate, trough-shaped body with an inner reflective surface having a cross-sectional curve of height H, throat opening T, and conforming substantially to the cartesian curve Y = ± AX b, the curve concentrating incident radiation into an included receiving area of maximum dimension R, wherein B is about 0.30 plus or minus 0.15, A is from about 0.,5 to 2.5, H/T is between about 0,0 and preferably about 1, and the concentration