FIELD: optics.
SUBSTANCE: stationary cascading lens concentrator of solar radiation with an optical method of directing the light flux contains three flat radial Fresnel lenses. In the focus of the first narrowing radial Fresnel lens, the second Fresnel short-focus radial lens is located, behind which is located a third Fresnel tapered lens, behind which the receiving element is located. Second spreading lens has a smaller focal length than the first, and they both form a collimator, and the receiving element is located in the focus of the entire optical system of the three lenses of the concentrator.
EFFECT: increasing the density of the output light flux, reducing the weight of the concentrator, the lack of electromechanical servo systems, reducing wind load, increasing the working time during the day, life and reliability.
1 cl, 1 dwg
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