STUDY ON ZOOM PERFORMANCE OF HYPERELASTIC DEFORMATION LINEAR-FOCUSING FRESNEL LENS

He Qian; Zheng Hongfei; Liang Shen; Ma Xinglong; Tang Yi

doi:10.19912/j.0254-0096.tynxb.2022-0286

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Acta Energiae Solaris Sinica ›› 2023, Vol. 44 ›› Issue (7) : 279-284. DOI: 10.19912/j.0254-0096.tynxb.2022-0286

STUDY ON ZOOM PERFORMANCE OF HYPERELASTIC DEFORMATION LINEAR-FOCUSING FRESNEL LENS

He Qian, Zheng Hongfei, Liang Shen, Ma Xinglong, Tang Yi

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Abstract

The variation of focal length with the oblique incidence angle of light is the main reason for reducing the performance of Fresnel lens solar concentrator. Based on the prism refraction theory, this paper analyzes the influence law of the inclined incidence angle on the focal length change of Fresnel lens by pointing out the optical reason for the focal length change. The method of adjusting the focal length by hyperelastic deformation, and the theoretical analysis based on the linear assumption under small deformation are put forward. The results show that when the deformation rate reaches 15%, the elongation of focal length is about 46.7%, which is less than 10% compared with the theoretical results. The results verify the correctness of the theoretical model, and provide a theoretical basis for the deformation and zoom of hyperelastic Fresnel lens.

Key words

Fresnel lens / linear focusing / oblique incidence / deformation caused zooming / solar concentrator

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He Qian, Zheng Hongfei, Liang Shen, Ma Xinglong, Tang Yi. STUDY ON ZOOM PERFORMANCE OF HYPERELASTIC DEFORMATION LINEAR-FOCUSING FRESNEL LENS[J]. Acta Energiae Solaris Sinica. 2023, 44(7): 279-284 https://doi.org/10.19912/j.0254-0096.tynxb.2022-0286

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