Beam Integration For Concentrating Solar Collector
First Claim
1. A concentrating solar collector apparatus including a photovoltaic (PV) cell defining an image plane and a solar collector optical system for concentrating solar light onto the PV cell, wherein the solar collector optical system comprises:
- a plurality of first optical elements for dividing the solar light into a plurality of separate beams; and
a secondary optical system for integrating the plurality of separate beams such that the plurality of separate beams are superimposed on the PV cell in a defocused state.
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Accused Products
Abstract
A concentrating solar collector that utilizes a solar collector optical system to concentrate solar light onto a PV cell (image plane), wherein the solar collector optical system includes an array of first optical elements that divide the solar light into separate beams, and a secondary optical system that integrates (superimposes) the separate beams in a defocused state at the image plane, thereby forming a uniform light distribution pattern on the PV cell. The secondary optical system is positioned at a distance from the aperture plane, whereby the rays of each separate beam leaving the secondary optical element are parallel. The image plane (PV cell) is located at the back focal point of the second image element, whereby all of the separate beams are superimposed on the PV cell in a defocused state. Optional intervening third optical elements are used to increase the acceptance angle.
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Citations
26 Claims
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1. A concentrating solar collector apparatus including a photovoltaic (PV) cell defining an image plane and a solar collector optical system for concentrating solar light onto the PV cell, wherein the solar collector optical system comprises:
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a plurality of first optical elements for dividing the solar light into a plurality of separate beams; and
a secondary optical system for integrating the plurality of separate beams such that the plurality of separate beams are superimposed on the PV cell in a defocused state. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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26. A Cassegrain-type concentrating solar collector comprising:
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a photovoltaic (PV) cell defining an image plane;
a concave primary mirror and a convex secondary mirror that collectively define a central optical axis and a primary focal point located on the central optical axis and a first region of the image plane; and
an array of lenslets, each optical element defining a focal point that coincides with a corresponding surface portion of the concave primary mirror.
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Specification