Stretched fresnel lens solar concentrator for space power

Abstract

A novel, high-efficiency, extremely light-weight, robust stretched Fresnel lens solar concentrator for space power is described. It consists of a flexible Fresnel lens attached to end supports, wherein said end supports stretch the lens to maintain its proper position and shape on orbit in space. One embodiment of the new concentrator includes means for lens deployment on orbit in space. In this embodiment, prior to deployment, the flexible lens and end supports are folded into a flat, low-volume package for efficient launch into space. Another embodiment of the new concentrator includes non-deployable means of stretching the lens to maintain its proper position and shape in space. Both embodiments of the new concentrator approach will provide significant advantages over the prior art in space photovoltaic concentrator arrays. Photovoltaic concentrator arrays using the new stretched lens will be much lighter and more economical than prior space concentrator arrays. Also, photovoltaic concentrator arrays using the new stretched lens will be easier to stow into a compact volume for launch, and easier to deploy on orbit than prior space concentrator arrays. In addition, the new stretched lens will eliminate the need for a fragile glass superstrate to support the lens, substantially improving robustness of the lens.