I also set up double parabolic reflectors with Fresnel lens in between to test out the effect of Fresnel lens in solar cell’s efficiency. I shined the flashlight so that the light rays would be reflected off the two parabolic reflectors and then go through the Fresnel lens. Fresnel lens is a type of lens effective in converging light rays as it consists of a series of concentric grooves etched into the plastic. They allow excellent light gathering ability as these contours act as individual refracting surfaces, bending parallel light rays to a common focal length as shown from the diagram. I manipulated the location of Fresnel lens in between the two parabolic reflectors and also measured the voltage produced by the solar cell when without the Fresnel lens.
Diagram #1 shows the set up of my experiment and diagram #2 shows the structure of the fresnel lens that allows the light rays to converge.
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Irene Jeong's signature project:Conducting various experiments using school's solar panel to find out the optimum environment for maximum efficiency of photovoltaic cells Archives
May 2017
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