Abstract
In the work, a new experimental equipment to investigate optical and power characteristics of small-size sunlight concentrators (Fresnel lenses) is presented. The system is based on a continuous sunlight simulator with a specular optics. The scheme and design parameters to register spatial distribution of illumination formed by the sunlight concentrator are determined. The compromise solution in the simulation of sunlight parameters was chosen to achieve the goals of the study. The optical system forming collimate light flux fully satisfies the requirements for illumination, spectral composition and angular divergence. The pair “spectrum-angular divergence” was defined as the relevant to determine concentrating capability and optical-power efficiency of Fresnel lenses. A monitoring technique for parameters of the initial light flux and a registration procedure for the irradiance distribution profile in the Fresnel lens focal plane were developed.
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