CN106405695A - Regional multifocal superposition square light spot condensing Fresnel lens and preparation method thereof - Google Patents
Regional multifocal superposition square light spot condensing Fresnel lens and preparation method thereof Download PDFInfo
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- CN106405695A CN106405695A CN201611083287.4A CN201611083287A CN106405695A CN 106405695 A CN106405695 A CN 106405695A CN 201611083287 A CN201611083287 A CN 201611083287A CN 106405695 A CN106405695 A CN 106405695A
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- fresnel lens
- isosceles right
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B3/00—Simple or compound lenses
- G02B3/02—Simple or compound lenses with non-spherical faces
- G02B3/08—Simple or compound lenses with non-spherical faces with discontinuous faces, e.g. Fresnel lens
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
- G02B19/0033—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use
- G02B19/0038—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with ambient light
- G02B19/0042—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with ambient light for use with direct solar radiation
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Abstract
The invention discloses a regional multifocal superposition square light spot condensing Fresnel lens and preparation method thereof. The Fresnel lens is formed by splicing four concentric angle-missing isosceles right triangle units, the center of the Fresnel lens is provided with a square gap, a concentric circular arc is burnt on a lens face of each of the concentric angle-missing isosceles right triangle units, and four focal points formed by each of the concentric angle-missing isosceles right triangle units are not in the center of the Fresnel lens. The lens face of the region multi-focal point superposed square light spot uniformly-condensing Fresnel lens is formed by splicing the four identical concentric angle-missing isosceles right triangles, the four concentric angle-missing isosceles right triangles are obtained by cutting a traditional spot condensing Fresnel lens, new structure design is not needed, and the lens manufacturing process is simple.
Description
【Technical field】
The invention belongs to collecting lenses technical field and in particular to one kind to be applied to light gathering photovoltaic power generating system subregion many
Focus superposition square focus spot uniform condensing Fresnel Lenses and preparation method thereof.
【Background technology】
Photovoltaic generation is a kind of principal mode that solar energy directly utilizes, and Fresnel Lenses is the core of concentration photovoltaic system
One of assembly, the quality of its performance directly affects the performance of whole system, and traditional point light-focusing Fresnel lens are due to optically focused
The Energy distribution of hot spot is uneven, and incident sunlight is through forming hot localised points, the depositing of hot localised points in battery surface after optically focused
Battery conversion efficiency can be reduced on the one hand, on the other hand can damage battery, shorten battery, lead to photovoltaic
The photoelectric transformation efficiency of electricity generation system is low.In addition, traditional focal beam spot of point light-focusing Fresnel lens and solar battery sheet
Shape mismatch, also make the utilization ratio of solar energy generally low.
【Content of the invention】
The technical problem to be solved is, for above-mentioned deficiency of the prior art, to provide one kind to be applied to gather
Subregion multifocal superposition square focus spot uniform condensing Fresnel Lenses of light photovoltaic generating system and preparation method thereof.This subregion
Domain multifocal superposition square focus spot uniform condensing Fresnel Lenses is by conventional point light-focusing Fresnel lens are resolved into four
Then this four parts are reconfigured by part again, and the principle of stacking according to light is improving the uniform of focal beam spot Energy distribution
Property.
The present invention employs the following technical solutions：
Subregion multifocal superposition square focus spot light-focusing Fresnel lens, described Fresnel Lenses is by four concentric unfilled corners etc.
Waist right angled triangle unit spliced is constituted, described Fresnel Lenses be provided centrally with square space, each is described to lack with one heart
On the lens face of angle isosceles right triangle unit, equal imprinting has isocentric circular arc, each described concentric unfilled corner isosceles right triangle
Four focuses that unit is formed are not all at the center of described Fresnel Lenses.
Further, the lens face of described concentric unfilled corner isosceles right triangle unit by first while, second while, the 3rd side
Form with the 4th side, the 3rd side head and the tail of four described concentric unfilled corner isosceles right triangle units are sequentially connected splicing composition institute
State square space.
Further, described first side is the hypotenuse of described concentric unfilled corner isosceles right triangle unit, described second side
Two waists being described concentric unfilled corner isosceles right triangle unit with the 4th side, described 3rd side is unfilled corner string.
Further, described isocentric circular arc starts imprinting with described 3rd side for initial string.
Further, described 3rd side is through the center of circle of isocentric circular arc, and the string with the second circular arc of described isocentric circular arc
Overlap.
Further, described second circular arc is semicircle.
A kind of subregion multifocal is superimposed the preparation method of square focus spot light-focusing Fresnel lens, comprises the following steps：
S1：With two orthogonal straight lines of AB and CD, the lens face in conventional point light-focusing Fresnel lens is divided into four
Part, straight line CD hands over described conventional point light-focusing Fresnel lens by outside second annulus in center in E and F point；Straight line AB hands over described
Conventional point light-focusing Fresnel lens by below outside second annulus in center in G point；
S2：Connect GE and GF and extend the described conventional point light-focusing Fresnel lens outermost annulus of friendship respectively with H and I point, even
Connect the first side that HI obtains described concentric unfilled corner isosceles right triangle unit, EH, EF and FI are respectively described concentric unfilled corner etc.
The second of waist right angled triangle unit while, the 3rd while and the 4th side；
S3：Along described concentric unfilled corner isosceles right triangle unit four sides by described concentric unfilled corner isosceles right angle trigonometry
Shape unit cuts down from described conventional point light-focusing Fresnel lens；
S4：By described four concentric unfilled corner isosceles right triangle units the 3rd side be mutually 90oDo seamless spliced shape
Become described Fresnel Lenses.
Compared with prior art, the present invention at least has the advantages that：
The lens face that the subregion multifocal of the present invention is superimposed square focus spot uniform condensing Fresnel Lenses is identical by four
Concentric unfilled corner isosceles right triangle be spliced, four concentric unfilled corner isosceles right triangles are from conventional point condensation Fresnel
On lens, cutting obtains, and need not carry out new construction design, lens production process is simple.
Further, one side lens face center is formed by the concentric unfilled corner isosceles right triangle unfilled corner of four identicals
Space, on the other hand four focus Dou Bu centers of four concentric each self-formings of unfilled corner isosceles right triangle, effectively reduce
The intensity of traditional point focusing Fresnel Lenses center light；This four parts can also be had by the subregion superposition of light simultaneously
Effect improves the uniformity of focal beam spot Energy distribution, it is to avoid the local of the uneven formation of conventional point light-focusing Fresnel lens optically focused
Focus, effectively increases the life-span of solaode.
Further, Fresnel Lenses focal beam spot be shaped as square, with the mating shapes of solar battery sheet so that
The utilization rate of solar energy improves further.
The present invention is also superimposed the preparation side of square focus spot uniform condensing Fresnel Lenses with having opened a kind of subregion multifocal
Method, it is only necessary to carry out described cutting and splicing to conventional point light-focusing Fresnel lens, need not carry out new construction design, therefore lens
Structure is simple, easily realization, and cost is relatively low.
Below by drawings and Examples, technical scheme is described in further detail.
【Brief description】
Fig. 1 is the front view that embodiment 1 subregion multifocal is superimposed square focus spot uniform condensing Fresnel Lenses；
Fig. 2 is the tomograph that embodiment 1 subregion multifocal is superimposed square focus spot uniform condensing Fresnel Lenses；
Fig. 3 is the front view of the concentric unfilled corner isosceles right triangle unit Fresnel Lenses of embodiment 1；
Fig. 4 is the cutting schematic diagram of the concentric unfilled corner isosceles right triangle unit Fresnel Lenses of embodiment 2；
Fig. 5 is the irradiance distribution figure in horizontal plane for embodiment 1 focal beam spot；
Fig. 6 is Fig. 5 focal beam spot irradiance distribution profile.
Wherein：1. Fresnel Lenses；2. concentric unfilled corner isosceles right triangle unit；3. the first side；4. the second side；5.
Three sides；6. the 4th side；7. conventional point light-focusing Fresnel lens.
【Specific embodiment】
The invention will be further described with reference to the accompanying drawings and examples.But this should not be interpreted as the above-mentioned master of the present invention
The scope of topic is only limitted to following examples, all belongs to the scope of the present invention based on the technology that foregoing invention content is realized.
Embodiment 1
A kind of subregion multifocal superposition square focus spot uniform condensing Fresnel Lenses, subregion described in the present embodiment is multifocal
The front view of point superposition square focus spot uniform condensing Fresnel Lenses 1 is as shown in Figure 1.It is by concentric unfilled corner of four identicals etc.
3rd side 5 of waist right angled triangle unit 2 (as shown in Figure 3) is mutually in 90 ° to be spliced；Described concentric unfilled corner isosceles right angle trigonometry
The ascending isocentric circular arc of the lens face imprinting of shape unit 2, described lens face is concentric unfilled corner isosceles right angle trigonometry, including
First when 3, second the 4, the 3rd in 5 and the 4th while 6；Described 3rd when 5 two end points are respectively with first 4 and the 4th side 6
Connect, described lens face the second circular arc from inside to outside is semicircle, described 3rd side 5 through the center of circle of isocentric circular arc, and with the
The string of two circular arcs is completely superposed.
Embodiment 2
A kind of subregion multifocal is superimposed the preparation method of square focus spot uniform condensing Fresnel Lenses, described in the present embodiment
Subregion multifocal be superimposed the concentric unfilled corner isosceles right triangle unit 2 in square focus spot uniform condensing Fresnel Lenses 1
Can cut from conventional point light-focusing Fresnel lens 7 and obtain, comprise the following steps：
S1：It is divided into four with two orthogonal bundle of lines lens faces of AB, CD in traditional point light-focusing Fresnel lens
Individual part (as shown in Figure 4), straight line CD hands over described point focusing Fresnel Lenses by outside second annulus in center in E and F point；Straight line
AB hand over described light-focusing Fresnel lens by below outside second annulus in center in G point；
S2：Connect GE, GF and extend friendship described point focusing Fresnel Lenses outermost annulus respectively with H, I, connect HI obtain
Described concentric unfilled corner isosceles right triangle unit Fresnel Lenses the first side 3, EH, EF, FI are respectively described concentric unfilled corner etc.
Waist right angled triangle unit Fresnel Lenses second is when the 4, the 3rd 5 and the 4th side 6；
S3：Along described concentric unfilled corner isosceles right triangle unit four sides by described concentric unfilled corner isosceles right angle three
Corner shaped elements 2 cut down from described conventional point light-focusing Fresnel lens 7；
S4：3rd side 5 of described four concentric unfilled corner isosceles right triangle units 2 is mutually 90oDo seamless spliced shape
Become described Fresnel Lenses 1.
From fig. 5, it can be seen that described subregion multifocal is superimposed the focusing light of square focus spot uniform condensing Fresnel Lenses
Shape of spot is square, with solar battery sheet form fit.From fig. 6, it can be seen that in (- 0.5,0.5) mm scope inner focusing light
Speckle irradiance maximum is 3.1 × 105W/m2, minima is 2.95 × 107W/m2, the optically focused uniformity is up to 97.5%.
Claims (7)
1. subregion multifocal superposition square focus spot light-focusing Fresnel lens it is characterised in that：Described Fresnel Lenses (1) is by four
Individual concentric unfilled corner isosceles right triangle unit (2) is spliced to form, and being provided centrally with of described Fresnel Lenses (1) is square empty
Gap, equal imprinting on the lens face of each described concentric unfilled corner isosceles right triangle unit (2) has isocentric circular arc, and each is described same
Four focuses that heart unfilled corner isosceles right triangle unit (2) is formed are not all at the center of described Fresnel Lenses (1).
2. a kind of subregion according to claim 1 multifocal superposition square focus spot light-focusing Fresnel lens, its feature exists
In：The lens face of described concentric unfilled corner isosceles right triangle unit (2) by first in (3), second (4), the 3rd side (5) and
4th side (6) composition, the 3rd side (5) of four described concentric unfilled corners isosceles right triangle unit (2) is sequentially connected spelling from beginning to end
Connect composition described square space.
3. a kind of subregion according to claim 2 multifocal superposition square focus spot light-focusing Fresnel lens, its feature exists
In：Described first side (3) is the hypotenuse of described concentric unfilled corner isosceles right triangle unit (2), described second side (4) and the 4th
Side (6) is two waists of described concentric unfilled corner isosceles right triangle unit (2), and described 3rd side (5) is unfilled corner string.
4. a kind of subregion according to claim 2 multifocal superposition square focus spot light-focusing Fresnel lens, its feature exists
In：Described isocentric circular arc starts imprinting with described 3rd side (5) for initial string.
5. a kind of subregion according to claim 4 multifocal superposition square focus spot light-focusing Fresnel lens, its feature exists
In：Described 3rd side (5) is through the center of circle of isocentric circular arc, and overlaps with the string of the second circular arc of described isocentric circular arc.
6. a kind of subregion according to claim 5 multifocal superposition square focus spot light-focusing Fresnel lens, its feature exists
In：Described second circular arc is semicircle.
7. a kind of subregion multifocal as described in claim 1 to 6 is superimposed the preparation side of square focus spot light-focusing Fresnel lens
Method is it is characterised in that comprise the following steps：
S1：With two orthogonal straight lines of AB and CD, the lens face in conventional point light-focusing Fresnel lens (7) is divided into four
Part, straight line CD hands over described conventional point light-focusing Fresnel lens (7) by outside second annulus in center in E and F point；Straight line AB hands over institute
State conventional point light-focusing Fresnel lens 7 by below outside second annulus in center in G point；
S2：Connect GE and GF and extend friendship described conventional point light-focusing Fresnel lens (7) outermost annulus respectively with H and I point, connect
HI obtains first side (3) of described concentric unfilled corner isosceles right triangle unit (2), and EH, EF and FI are respectively described to be lacked with one heart
The second of angle isosceles right triangle unit (2) (5) and the 4th side (6) in (4), the 3rd；
S3：Along described concentric unfilled corner isosceles right triangle unit (2) four sides by described concentric unfilled corner isosceles right angle trigonometry
Shape unit (2) cuts down from described conventional point light-focusing Fresnel lens (7)；
S4：By described four concentric unfilled corners isosceles right triangle unit (2) the 3rd side (5) mutually in 90 ° do seamless spliced
Form described Fresnel Lenses (1).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611083287.4A CN106405695B (en) | 2016-11-30 | 2016-11-30 | A kind of subregion multifocal superposition square focus spot light-focusing Fresnel lens and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611083287.4A CN106405695B (en) | 2016-11-30 | 2016-11-30 | A kind of subregion multifocal superposition square focus spot light-focusing Fresnel lens and preparation method thereof |
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| CN106405695B CN106405695B (en) | 2018-08-21 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109581550A (en) * | 2018-12-26 | 2019-04-05 | 中国科学院西安光学精密机械研究所 | A kind of Fresnel light condensing lens and preparation method thereof |
| CN111562634A (en) * | 2020-05-08 | 2020-08-21 | 大连工业大学 | Design method of partitioned uniform light illumination Fresnel lens based on Lambert type LED light source |
| CN114035255A (en) * | 2021-11-29 | 2022-02-11 | 武汉华工图像技术开发有限公司 | Holographic grating film, manufacturing method thereof and anti-counterfeiting medium |
| WO2023000543A1 (en) * | 2021-07-22 | 2023-01-26 | 亿信科技发展有限公司 | Beam expanding optical film, display apparatus, and multidirectional beam expanding optical film |
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| CN202177711U (en) * | 2011-08-04 | 2012-03-28 | 廖贤杰 | Fresnel Lens assembly and mould for manufacturing Fresnel Lens |
| CN104199132A (en) * | 2014-09-25 | 2014-12-10 | 四川钟顺太阳能开发有限公司 | Multi-focus light spot energy homogenizing Fresnel lens |
| FR3009871A1 (en) * | 2013-08-20 | 2015-02-27 | Sunpartner | LARGE LENS OF FRESNEL AND THE METHOD OF REALIZATION |
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2016
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202177711U (en) * | 2011-08-04 | 2012-03-28 | 廖贤杰 | Fresnel Lens assembly and mould for manufacturing Fresnel Lens |
| FR3009871A1 (en) * | 2013-08-20 | 2015-02-27 | Sunpartner | LARGE LENS OF FRESNEL AND THE METHOD OF REALIZATION |
| CN104199132A (en) * | 2014-09-25 | 2014-12-10 | 四川钟顺太阳能开发有限公司 | Multi-focus light spot energy homogenizing Fresnel lens |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109581550A (en) * | 2018-12-26 | 2019-04-05 | 中国科学院西安光学精密机械研究所 | A kind of Fresnel light condensing lens and preparation method thereof |
| CN111562634A (en) * | 2020-05-08 | 2020-08-21 | 大连工业大学 | Design method of partitioned uniform light illumination Fresnel lens based on Lambert type LED light source |
| CN111562634B (en) * | 2020-05-08 | 2021-11-19 | 大连工业大学 | Design method of partitioned uniform light illumination Fresnel lens based on Lambert type LED light source |
| WO2023000543A1 (en) * | 2021-07-22 | 2023-01-26 | 亿信科技发展有限公司 | Beam expanding optical film, display apparatus, and multidirectional beam expanding optical film |
| CN114035255A (en) * | 2021-11-29 | 2022-02-11 | 武汉华工图像技术开发有限公司 | Holographic grating film, manufacturing method thereof and anti-counterfeiting medium |
| CN114035255B (en) * | 2021-11-29 | 2023-12-19 | 武汉华工图像技术开发有限公司 | Holographic grating film, manufacturing method thereof and anti-counterfeiting medium |
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| CN106405695B (en) | 2018-08-21 |
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