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WO2018133116A1 - Appareil de concentration de lumière de fresnel - Google Patents

Appareil de concentration de lumière de fresnel Download PDF

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Publication number
WO2018133116A1
WO2018133116A1 PCT/CN2017/072244 CN2017072244W WO2018133116A1 WO 2018133116 A1 WO2018133116 A1 WO 2018133116A1 CN 2017072244 W CN2017072244 W CN 2017072244W WO 2018133116 A1 WO2018133116 A1 WO 2018133116A1
Authority
WO
WIPO (PCT)
Prior art keywords
fresnel lens
light
light receiving
fresnel
concentrating
Prior art date
Application number
PCT/CN2017/072244
Other languages
English (en)
Chinese (zh)
Inventor
胡笑平
Original Assignee
博立多媒体控股有限公司
胡笑平
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 博立多媒体控股有限公司, 胡笑平 filed Critical 博立多媒体控股有限公司
Priority to PCT/CN2017/072244 priority Critical patent/WO2018133116A1/fr
Publication of WO2018133116A1 publication Critical patent/WO2018133116A1/fr

Links

Classifications

    • 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

Definitions

  • the present invention relates to the field of optical components, and in particular to a Fresnel concentrating device including a Fresnel lens.
  • a Fresnel lens is a thin lens.
  • the continuous curved surface of the ordinary lens is divided into several segments, and the Fresnel lens is formed by placing each curved surface on the same plane or a substantially smooth curved surface after reducing the thickness of each segment.
  • the refractive surface of a Fresnel lens is generally discontinuously stepped or toothed and is therefore often referred to as a "toothed surface”.
  • a detailed description of the Fresnel lens can be found in the PCT application entitled "Finnel Lens System", published on June 2, 2016, and International Publication No. WO/2017/082097.
  • Fresnel lenses are often used for signal detection systems or solar system focusing due to their peculiar shape (the macroscopic shape is usually a thin layer), which is beneficial for enhancing signal or light intensity and reducing system size.
  • a Fresnel concentrating device comprising a first light receiving device having a first light receiving surface.
  • the first light receiving surface includes a first light receiving region and a second light receiving region having the same symmetry axis, wherein the second light receiving region is located at a central region of the first light receiving surface, and the first light receiving region is located outside the second light receiving region.
  • the first light receiving region is formed by the tooth surface of the first Fresnel lens, and the first Fresnel lens is a concentrating Fresnel Lens.
  • the second light-receiving area is formed by the tooth surface of the second Fresnel lens, or by a smooth surface or a cornice.
  • the focus of the first Fresnel lens is at a different location on the same optical axis as the focus of the second Fresnel lens, or on a different optical axis.
  • the Fresnel concentrating device of the present invention the light-receiving surface is divided into different regions according to the distance from the symmetry axis, and different optical designs are adopted in different regions, so that the surface can be more uniform in the focal plane.
  • Light energy distribution usually does not use the light energy distribution on the focal plane as the main design indicator.
  • Applying the concentrating device according to the present invention to a photovoltaic panel concentrating enamel for a solar energy system can improve the efficiency of the photovoltaic panel and reduce the maximum temperature rise of the photovoltaic panel, thereby enabling the cost of the concentrating system to be increased without increasing the cost of the concentrating system. Improve the performance of concentrating solar systems.
  • FIG. 1 is a schematic view of a Fresnel concentrating device of Embodiment 1;
  • FIG. 2 is a schematic view showing an example of several different shapes of a first light-receiving device in the present invention
  • FIG. 3 is a schematic view of a Fresnel concentrating device of Embodiment 2;
  • FIG. 4 is a schematic view of a Fresnel concentrating device of Embodiment 3; [0012] FIG.
  • FIG. 5 is a schematic view of a Fresnel concentrating device of Embodiment 4.
  • FIG. 6 is a schematic view of a Fresnel concentrating device of Embodiment 5.
  • Embodiment 1 An embodiment of a Fresnel concentrating device according to the present invention can refer to FIG. 1 and includes a first light receiving device 110.
  • the first light receiving device 110 has a first light receiving surface including a first light receiving region 111 and a second light receiving region 112 having the same axis of symmetry.
  • the second light receiving region 112 is located in a central region (inner region) of the first light receiving surface, and the first light receiving region 111 is located outside the second light receiving region (peripheral region).
  • the first light receiving region 111 is formed by the tooth surface of the first Fresnel lens, and as shown in FIG. 1, the tooth surface includes a plurality of annular teeth 1111.
  • the first Fresnel lens can generally employ a concentrating Fresnel lens.
  • the so-called "concentrating type" Fresnel lens refers to a Fresnel lens whose tooth surface is derived from the convex lens surface, and thus has a convergence effect on light.
  • the second light receiving region 112 is formed by a transparent plane, which can also be regarded as a Fresnel lens having a focal length of infinity (the height of the teeth is 0).
  • the second light-receiving area may also be a smooth surface of another shape, or a hollowed-mouth opening, or formed by the tooth flanks of the second Fresnel lens.
  • the convergence of the light rays as a whole does not concentrate the light intensity on the only focus, but can be more evenly distributed. Distributed on the focal plane.
  • FIG. 1 Only two light receiving regions are shown in FIG. 1. In other embodiments, in the case where the first light receiving surface area is large, more light receiving regions may be similarly divided, for example, in the first light receiving region.
  • a third light-receiving area or the like having the same axis of symmetry is continuously divided between the second light-receiving area, so as to improve the uniformity of light intensity on the focal plane by a finer optical design. It is worth noting that, based on the manufacturing characteristics of the Fresnel lens, the method of sub-region design of the light-receiving surface only increases the workload of the design link, and does not increase the manufacturing cost of the Fresnel lens, but can bring Significant improvements in performance.
  • the second Fresnel lens may be an astigmatic Fresnel lens.
  • the so-called "astigmatism type" Fresnel lens refers to a Fresnel lens whose tooth surface is derived from a concave lens surface, and thus has a diverging effect on light.
  • the use of an astigmatic Fresnel lens in the central region of the first light receiving surface prevents the light incident from the central region from being concentrated to the same position.
  • the first Fresnel lens or the second Fresnel lens may be both sides
  • the double-sided Fresnel lens of the tooth surface can multiply the optical effect of the lens and, in addition, facilitate different optical designs on both sides of the lens.
  • the tooth flanks of the first Fresnel lens or the flanks of the second Fresnel lens may be composed of at least one linear Fresnel unit.
  • the so-called "linear" Fresnel unit including a linear astigmatic Fresnel unit and a linear concentrating Fresnel unit, usually means that the center of focus of the Fresnel unit is a line.
  • An advantageous aspect of applying "linear" astigmatism in the present invention is that the light is diverged only in one direction, so that the light is easily confined to the desired area.
  • An advantageous aspect of applying "linear" concentrating in the present invention is that the focus center of the light itself has a certain uniformity, not concentrated at one point.
  • the tooth surface of the linear astigmatic Fresnel unit may originate from a concave cylindrical surface, a concave elliptical cylinder surface, or a concave polynomial cylinder surface
  • the tooth surface of the linear concentrating Fresnel unit may be derived from the convex surface Cylindrical surface, convex elliptical cylinder, or convex polynomial cylinder.
  • the first light receiving device 110 is a transmissive optical device.
  • reflective optics may also be employed, for example, a reflective film is deposited on the back side of the first Fresnel lens or the second Fresnel lens, or a mirror is disposed on the back side thereof to form a reflective type. lens. With a reflective lens, since the light passes through the lens twice, the optical effect of the lens can be multiplied without increasing the cost.
  • the contours of the first light receiving region and the second light receiving region are circular. In other embodiments, contours of other shapes may also be used to divide the light-receiving regions, such as square, elliptical, and polygonal.
  • the macroscopic shape of the first light receiving surface is a plane.
  • the term "macroscopic shape" refers to the overall shape after undulation of the flank of the tooth surface of the Fresnel lens.
  • the first light-receiving surface (including the first and second light-receiving regions) may employ a plurality of rich surface shapes.
  • the macroscopic shape of the first light receiving surface may be other forms of smooth curved surfaces, such as cylindrical surfaces, second order or higher order polynomial circumferential symmetry planes.
  • the first light receiving surface may be a folded surface.
  • the macroscopic shape of the first light receiving device is a ladder shape
  • the first light receiving region is located around the terrace
  • the second light receiving region is located at the top of the ladder.
  • the so-called ladder can be selected from the group consisting of: spherical ladders, ellipsoidal ladders, high-order polynomial circumferential symmetry ladders, quadrilateral frustums, and conical frustums.
  • the use of a curved surface or a first light-receiving surface of a folded surface shape can effectively enhance the adaptability of the concentrating device to the deflection of the incident angle of the sun.
  • FIG. 2 shows an example of several different shapes employed by the first light-receiving device in the present invention.
  • FIG. 2 (a) is a schematic view of a quadrangular frustum, the first light receiving region 011 is located around the frustum (the fringe of the Fresnel lens 0111, the same below), and the second light receiving region 012 is located at the frustum
  • Fig. 2(b) is a schematic view showing a smooth circumferential symmetry plane, the first light receiving region 011 is located in a region around the curved surface, and the second light receiving region 012 is located at a central region at the top of the curved surface; Fig.
  • FIG. 2(c) is a smooth A schematic view of a cylinder (e.g., a cylindrical surface, or an elliptical cylinder, or other secondary or higher order surface), the first light receiving region 011 is located outside the cylinder surface, and the second light receiving region 012 is located at the top of the cylinder surface.
  • a cylinder e.g., a cylindrical surface, or an elliptical cylinder, or other secondary or higher order surface
  • the first light receiving region 011 is located outside the cylinder surface
  • the second light receiving region 012 is located at the top of the cylinder surface.
  • the second light receiving device may be further disposed on the optical path after the first light receiving device, and specifically may include a single or multiple light receiving regions. Fresnel lens, in order to provide more freedom for optical design, to achieve better results.
  • concentrating devices used in combination with the first light receiving device such as a tapered concentrating device or a tapered light guiding device, may be further provided, thereby ensuring The homogeneity of the uniformity of light intensity further increases the concentration ratio.
  • FIG. 3 Another embodiment of the Fresnel concentrating device according to the present invention can be referred to FIG. 3, including a first light receiving device 210 and a second light receiving device 220.
  • the macroscopic shape of the first light receiving device 210 is a plane on which the first light receiving region 211 and the second light receiving region 212 having the same axis of symmetry are distributed.
  • the first light-receiving area 211 has a square shape and is formed by a tooth surface of the first Fresnel lens, and the tooth surface includes a plurality of annular teeth 2111.
  • the second light-receiving area 212 is located at a central position surrounded by the first light-receiving area 211, and is formed of a planar light-transmitting material (for example, a glass piece or a transparent plastic piece) having a square shape.
  • the second light receiving device 220 is disposed along the optical path after the first light receiving device.
  • the second light receiving device is served by a third Fresnel lens.
  • the tooth surface of the third Fresnel lens can be regarded as a third light receiving area, which includes a plurality of annular teeth 2201.
  • the second light-receiving device may also divide the plurality of light-receiving regions similarly to the first light-receiving device, and adopt different optical designs in different light-receiving regions.
  • the third Fresnel lens may adopt an astigmatic Fresnel lens to facilitate uniform distribution of light intensity.
  • the tooth flanks of the third Fresnel lens are composed of at least one linear Fresnel unit to achieve "linear" astigmatism or concentrating.
  • FIG. 4 Another embodiment of the Fresnel concentrating device according to the present invention can be referred to FIG. 4, including the first light receiving device 310.
  • the macroscopic shape of the first light receiving device 210 is a plane on which the first light receiving region 311 and the second light receiving region 312 having the same axis of symmetry are distributed.
  • the first light receiving region 311 has a square shape and is formed by a tooth surface of the first Fresnel lens, and the tooth surface includes a plurality of annular ridges 3111.
  • the second light-receiving area 312 is located at a central position surrounded by the first light-receiving area 311, and has a circular shape, formed by the tooth surface of the second Fresnel lens, and the tooth surface includes a plurality of annular ridges 3121 (in FIG. 4 Shown in dotted lines for easy viewing).
  • the rib 3111 is different from the rib 3121 such that the first Fresnel lens has a different focal length from the second Fresnel lens.
  • the back surface of the first Fresnel lens and the second Fresnel lens are further plated with a reflective film 3101, so that the apparatus of the present embodiment is formed as a reflective concentrating device.
  • the reflective concentrating device may be formed by providing a mirror on the optical path after the first light receiving surface.
  • FIG. 5 Another embodiment of the Fresnel concentrating device according to the present invention can be referred to FIG. 5, including a first light receiving device 410, and a tapered concentrating device 430 and a tapered light guiding device 440.
  • the macroscopic shape of the first light-receiving device 410 is a plane on which two light-receiving regions having a square shape, that is, a first light-receiving region 411 and a second light-receiving region 412, which are nested inside and outside, are distributed.
  • the first light receiving region 411 is located outside and is formed by the tooth flanks of the first Fresnel lens.
  • the tooth flanks of the first Fresnel lens include a plurality of quadrilateral ribs 4111, each of which can be regarded as a linear Fresnel unit for concentrating toward a central region of the symmetry axis ZZ.
  • the second light-receiving region 412 is located inside and is formed of a planar light transmissive material or is a hollowed cornice.
  • an auxiliary concentrating device such as a conical concentrating device 430, is further disposed in the embodiment, and has a larger opening at one end and a smaller opening at the other end, and is disposed along the optical path.
  • First light receiving device The rear end and the larger end of the cornice face the first light receiving region 411.
  • the inner surface of the conical concentrating device 430 is formed by a mirror or a reflective linear astigmatic Fresnel lens for further concentrating the light from the first light receiving surface, thereby ensuring the uniformity of the light intensity. , further increase the concentration ratio.
  • a tapered light guiding device 440 is further disposed, which has a larger opening at one end and a smaller opening at the other end, and is disposed behind the first light receiving device along the optical path and has a larger opening. One end faces the second light receiving region 412.
  • the tapered light guiding device 440 is disposed within the tapered concentrating device 430, and its inner and outer surfaces are formed by a mirror or a reflective linear astigmatic Fresnel lens.
  • the tapered light guiding device is also used to change the optical path to ensure that light from the first light receiving region and the second light receiving region is not reflected by the tapered light collecting device to the outside of the device.
  • the shape of the conical concentrating device and the conical light guiding device adopts a quadrangular frustum.
  • the advantage of this shape is that it is convenient to arrange a plurality of concentrating devices together.
  • other shapes of frustum can also be used, such as a conical frustum, which can be determined according to design needs.
  • FIG. 6 Another embodiment of the Fresnel concentrating device according to the present invention can refer to FIG. 6, including a first light receiving device 510, and a tapered concentrating device 530 and a tapered light guiding device 540.
  • first light receiving region 511 and the second light receiving region 512 of the first light receiving device 510 have a circular contour
  • the tooth surface of the first Fresnel lens is A plurality of circular toroids 5111 are formed.
  • both the tapered concentrating device 530 and the tapered light guiding device 540 employ a conical frustum to better correspond to the contours of the first light receiving region 511 and the second light receiving region 512, respectively.
  • the advantage of using a conical shape is that the area of the side wall of the frustum is relatively small and easy to process. Moreover, many photovoltaic panels are currently circular in shape, so that circular concentrating devices are easier to match with existing photovoltaic panels, thereby reducing the overall cost of the system.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Lenses (AREA)

Abstract

Un appareil de concentration de lumière de Fresnel comprend un premier dispositif de réception de lumière (110) ayant une première surface d'acceptation de lumière. La première surface d'acceptation de lumière comprend une première région d'acceptation de lumière (111) et une seconde région d'acceptation de lumière (112) ayant le même axe de symétrie, la seconde région de réception de lumière (112) est située dans une région centrale de la première surface d'acceptation de lumière, et la première région d'acceptation de lumière est située à l'extérieur de la seconde région d'acceptation de lumière (112). La première région d'acceptation de lumière (111) est formée d'une face de dent d'une première lentille de Fresnel, et la première lentille de Fresnel est une lentille de Fresnel de concentration. La seconde région d'acceptation de lumière (112) est formée d'une surface de dent d'une seconde lentille de Fresnel, ou est formée d'une surface lisse ou d'une ouverture. Le point focal de la première lentille de Fresnel et le point focal de la seconde lentille de Fresnel sont situés à des positions différentes sur le même axe optique ou sont situés sur des axes optiques différents. En divisant la surface d'acceptation de lumière en différentes régions en fonction de la distance par rapport à l'axe de symétrie et en adoptant différentes conceptions optiques dans différentes régions, une distribution d'énergie lumineuse plus uniforme peut être présentée sur un plan focal.
PCT/CN2017/072244 2017-01-23 2017-01-23 Appareil de concentration de lumière de fresnel WO2018133116A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CN2017/072244 WO2018133116A1 (fr) 2017-01-23 2017-01-23 Appareil de concentration de lumière de fresnel

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PCT/CN2017/072244 WO2018133116A1 (fr) 2017-01-23 2017-01-23 Appareil de concentration de lumière de fresnel

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101694540A (zh) * 2009-08-13 2010-04-14 苏州纳米技术与纳米仿生研究所 一种菲涅耳聚光器及其实现方法
JP2012252227A (ja) * 2011-06-03 2012-12-20 Dainippon Printing Co Ltd 反射型スクリーン、反射型スクリーンの製造方法、及び反射型投射システム
CN202720345U (zh) * 2012-09-10 2013-02-06 鲁健东 复合菲涅尔透镜
US9030736B2 (en) * 2012-09-28 2015-05-12 Dai Nippon Printing Co., Ltd. Reflection screen and image display system
WO2016082097A1 (fr) * 2014-11-25 2016-06-02 博立多媒体控股有限公司 Système de lentille de fresnel
CN106288437A (zh) * 2015-06-01 2017-01-04 博立码杰通讯(深圳)有限公司 多功能太阳能系统

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101694540A (zh) * 2009-08-13 2010-04-14 苏州纳米技术与纳米仿生研究所 一种菲涅耳聚光器及其实现方法
JP2012252227A (ja) * 2011-06-03 2012-12-20 Dainippon Printing Co Ltd 反射型スクリーン、反射型スクリーンの製造方法、及び反射型投射システム
CN202720345U (zh) * 2012-09-10 2013-02-06 鲁健东 复合菲涅尔透镜
US9030736B2 (en) * 2012-09-28 2015-05-12 Dai Nippon Printing Co., Ltd. Reflection screen and image display system
WO2016082097A1 (fr) * 2014-11-25 2016-06-02 博立多媒体控股有限公司 Système de lentille de fresnel
CN106288437A (zh) * 2015-06-01 2017-01-04 博立码杰通讯(深圳)有限公司 多功能太阳能系统

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