Off-axis non-rotationally symmetric superimposed light-spot concentrating Fresnel lens and preparation method thereof
A non-rotational symmetry, Fresnel lens technology, applied in the direction of lenses, optics, optical components, etc., can solve the problems of low photoelectric conversion efficiency, low solar energy utilization efficiency, and shortened battery life in solar photovoltaic power generation systems, so as to avoid partial Hot spots, simple structure, and the effect of improving utilization
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0034] The front view of the off-axis non-rotationally symmetrically superimposed square spot uniformly condensing Fresnel lens 1 in this embodiment is as follows figure 1 Shown. It consists of four identical isosceles right-angled triangle elements 2 (such as image 3 The first side 3 shown) is connected end-to-end and seamlessly spliced; the four first sides 3 form 90° with each other, and the distribution of the four isosceles right-angled triangle unit Fresnel lenses is completely consistent and symmetrical about the coordinate axis.
[0035] The lens surface of the isosceles right-angled triangle unit 2 is engraved with rings from small to large, and the lens surface includes a first side 3, a second side 4, and a third side 5 arc sides; the first side 3 The two end points of are connected to the second side 4 and the third side 5 respectively.
Embodiment 2
[0037] The superposition process of the off-axis non-rotational symmetry superimposed square spot uniformly condensing Fresnel lens in this embodiment is as follows: Figure 4 Shown.
[0038] Since the distribution of the four quadrants is symmetrical, take the first and third quadrants as examples. Such as Figure 4 As shown, the light rays a and c are the edge rays after the incident beam is refracted by the first quadrant of the square lens, and the light rays b and d are the edge rays corresponding to the third quadrant of the square lens. According to the principle of edge optics, when light rays a and b (or light rays c, d) intersect, the light spots generated by the four quadrants are completely overlapped, and all light rays pass through the square area, thus the output position of the uniform light spot can be determined Focal length f and size L 0 . From the knowledge of geometric optics, the spot size gradually decreases before the focal length f, and the spot size re...
Embodiment 3
[0040] The preparation process of the isosceles right triangle unit 2 described in this embodiment is as follows:
[0041] S1: First, determine the side length L, focal length f, and focal spot side length L of the square lens according to the size of the solar cell. 0 , Lens ring belt tooth width w and other parameters;
[0042] S2: Then calculate the corresponding optical axis coordinate offset S and the off-axis focus focal length F of the lens according to the off-axis non-rotational symmetry superposition principle;
[0043]
[0044]
[0045] S3: Finally, calculate the number of belts N and the radius of curvature of the belts r j , Annulus inclination α j And the serration height d j Wait for Fresnel
[0046] The specific parameters of the mirror generate a solid lens.
[0047]
[0048]
[0049] nsinα j =sin[α j +arctg(r j / F)];
[0050] d j =w·tgα j ;
[0051] Wherein, j=1, 2, 3...N, n is the refractive index of the lens material, and the Fresnel lens is prepared according to the a...
PUM
Login to View More Abstract
Description
Claims
Application Information
Login to View More