Condenser lens

Abstract

The invention provides a condenser lens suitable for solar condensing devices, which comprises a flat plate type transparent body, a first Fresnel lens structure and a second Fresnel lens structure. The flat plate type transparent body comprises a first surface and a second surface, which are arranged oppositely; the first Fresnel structure comprises a plurality of first spherical sawteeth distributed concentrically on the first surface of the flat plate type transparent body. The second Fresnel structure comprises a plurality of second spherical sawteeth distributed concentrically on the first surface of the flat plate type transparent body. The second spherical sawteeth are arranged around the first spherical sawteeth, and the radius of curvature of the second spherical sawteeth is different from that of the first spherical sawteeth. When used in combination with a solar cell panel of a smaller size, the condenser lens still can ensure that the condensed light rays have uniform light ray intensity distribution on the solar cell panel.

Description

technical field [0001] The invention relates to a concentrating lens, in particular to a concentrating lens applicable to a solar concentrating device. Background technique [0002] As a new type of energy, solar energy has been paid more and more attention by people. At present, most solar light collecting devices use a Fresnel lens as a condensing lens to condense sunlight to the solar cell wafer. However, since the spherical sawtooth of the Fresnel lens has different degrees of refraction of sunlight, the sunlight reaching the solar cell will be uneven, which is not conducive to the full utilization of the solar cell panel. [0003] see figure 1 , the invention patent application with the application number 200910305795.6 filed by the inventor on August 19, 2009 provides a non-imaging condenser lens, which can significantly improve the uneven sunlight on the solar panel. figure 2 Shown is the simulation curve of the light intensity distribution of the non-imaging conc...

AI Technical Summary

Problems solved by technology

[0007] Compared with the non-imaging condenser lens mentioned in the background art, the condenser lens provided by the present invention has two spherical serrated Fresnel lens structures with different radii of curvature, which utilizes the Fresnel lens with the second spherical serration The Fresnel lens structure condenses sunlight, and uses the Fresnel lens structure of the first spherical sawtooth with different curvature radii to adjust the high light energy distribution accordingly, so that the uneven light energy distribution can be significantly improved

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