Invention Grant
- Patent Title: Non-imaging solar concentrator and cosine factor correction device using compound polyhedral surfaces and method of use thereof
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Application No.: US14766651Application Date: 2014-02-12
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Publication No.: US09658438B2Publication Date: 2017-05-23
- Inventor: Thomas C. Forrester , Mark Bennahmias , Robert S. Block , Paul Sidlo , Rudolf A. Wiedemann
- Applicant: Litricity, LLC
- Applicant Address: US NV Reno
- Assignee: LITRICITY, LLC.
- Current Assignee: LITRICITY, LLC.
- Current Assignee Address: US NV Reno
- Agency: Buchanan Ingersoll & Rooney PC
- International Application: PCT/US2014/015984 WO 20140212
- International Announcement: WO2014/126983 WO 20140821
- Main IPC: G02B5/04
- IPC: G02B5/04 ; G02B19/00 ; H01L31/054 ; F24J2/08

Abstract:
A compound polyhedral concentrator (CPOC) lens is disclosed with one smooth curved surface facing the sun and an inner surface comprised of a 3D pattern of interpenetrating minimum deviation prisms with a common origin facing the absorber. This new type of stationary solar concentrator is used to extend the acceptance angles by minimizing blocking and tip optical losses that are common with radial Fresnel design forms. Moreover, when considering the extended time period for non-tracking of the sun's movement commensurate with the increased acceptance angles the total energy collected using a combination of a CPOC lens and a photovoltaic device will be greater than the total energy collected using the photovoltaic device by itself.
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