Three-zone multifocus hybrid Fresnel lens concentrator

Ya-Chi Lu; Jui-Wen Pan

doi:10.1364/AO.420093

Applied Optics
Vol. 60,
Issue 12,
pp. 3281-3289
(2021)
•https://doi.org/10.1364/AO.420093

Three-zone multifocus hybrid Fresnel lens concentrator

Ya-Chi Lu and Jui-Wen Pan

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Ya-Chi Lu and Jui-Wen Pan, "Three-zone multifocus hybrid Fresnel lens concentrator," Appl. Opt. 60, 3281-3289 (2021)

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Abstract

In this paper, we designed a three-zone multifocus hybrid Fresnel lens concentrator without a homogenizer. This concentrator uses three types of prisms: a refractive prism, a single total internal reflection (STIR) prism, and a double TIR (DTIR) prism. In order to achieve a uniform irradiance distribution, the Fresnel lens is cut into four quadrants and reconnected. Moreover, by decreasing the angle of the edge ray, the hot spot effects caused by the STIR and DTIR prisms can be reduced. Finally, the three-zone multifocus hybrid Fresnel lens concentrator can achieve a geometric concentration ratio of 2121X, f-number of 0.441, optical efficiency of 76.570%, acceptance angle of ${\pm}0.268^\circ$, uniformity of 57.002%, and hot spot criteria of 1.369.

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Data Availability

Data underlying the results presented in this paper are not publicly available at this time but may be obtained from the authors upon reasonable request.

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Parameters	Specifications
Geometric concentration ratio	$> 2000 \times$
Acceptance angle	$\geq {0.265}^{\circ}$
F-number ( $f / #$ )	$< 0.45$
Focal length of concentrator $(f_{0})$	140 mm
Total length of concentrator $(f_{0} - (α + β))$	$< 140 m m$
Pitch size	0.3 mm
Solar cell size	$5.5 m m \times 5.5 m m$
Designed wavelength	550 nm
Designed material	PMMA

Zone	Collection Half-Angle
Zone1	$0^{\circ} \sim {19.82}^{\circ}$ (Refractive prism)
Zone2	${21.604}^{\circ} \sim {36.427}^{\circ}$ (DTIR prism)
Zone3	${37.74}^{\circ} \sim {39.75}^{\circ}$ (DTIR prism),
	${39.75}^{\circ} \sim {48.138}^{\circ}$ (STIR prism)

	Hot Spot Criteria
Zone 2	0.525
Zone 3	0.28

	Efficiency	Uniformity	Hot Spot Criteria
Zone 1 and Zone 2	82.803%	55.833%	1.346
Zone 1, Zone 2, and Zone 3	76.570%	57.002%	1.369

Parameters	Tolerance Level
Decenter X (mm)	$\pm 0.2$
Decenter Y (mm)	$\pm 0.2$
Decenter Z (mm)	$\pm 0.2$
Tilt X (degrees)	$\pm 0.2$
Tilt Y (degrees)	$\pm 0.2$

Design Model	Geometrical Concentration Ratio	F/#	Acceptance Angle
Traditional Fresnel lens [11]	1018×	1	0.305°
Hybrid Fresnel lens [12]	1759.8×	0.59	0.23°
Multifocus Fresnel lens [13]	800×	0.775	0.608°
Novel design	2121×	0.441	0.268°

Abstract

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Equations (13)

Applied Optics