CN102305959B - Focusing system having grating structure - Google Patents
Focusing system having grating structure Download PDFInfo
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- CN102305959B CN102305959B CN2011102601818A CN201110260181A CN102305959B CN 102305959 B CN102305959 B CN 102305959B CN 2011102601818 A CN2011102601818 A CN 2011102601818A CN 201110260181 A CN201110260181 A CN 201110260181A CN 102305959 B CN102305959 B CN 102305959B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/52—PV systems with concentrators
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Abstract
The invention relates to a focusing system having a grating structure. The system comprises a two-dimensional grating on a thin film; a shape of the thin film is a polygon having over three boundaries; at least one boundary of the thin film is connected with a backlight device and other boundaries have reflective films. According to the invention, a thickness of a film concentrator is further reduced; and solar energy is effectively utilized and is converted into a power source for indoor illumination, backlight of an LCD panel or a solar cell. Besides, with regard to illumination of solar energy, a requirement on chip size is low and a cost is saved.
Description
Technical field
The present invention relates to throw light on and show that the light source in field obtains technical field, particularly relate to a kind of condenser system with optical grating construction.
Background technology
In silica-based optical communication, because little more a lot of than existing optical fiber as the waveguide dimensions of light interconnection, traditional end face is aimed at coupling, and the input and output coupling efficiency of light signal is very low, and very high to the error requirements of aiming at.In order to improve coupling efficiency and to reduce the error requirements of aiming at, utilize optical grating diffraction to realize that the pattern match between input light and the waveguide is suggested.As US Patent No. 005081615A, a kind of mutual conversion that utilizes between one-dimensional grating implementation space light and the thin-film waveguide pattern is disclosed, and US Patent No. 5033812 discloses a kind of structured waveguide with grating, can be converted to spatial light to the transmission light of waveguide easily by grating.In addition, having the coupling grating that incline structure and bottom surface be added with catoptron also is suggested.But above patent is one-dimentional structure, the polarization of an only corresponding direction.
Summary of the invention
The objective of the invention is to overcome the defective of above-mentioned prior art, a kind of condenser system with optical grating construction is provided, utilize the realization of two-dimensional grating structure to the coupling of incident light, the light of two polarization directions can be converted into along the light of film transmission, realize the effective collection to natural light.
Technical solution of the present invention is as follows:
A kind of condenser system with optical grating construction, characteristics are that its formation comprises the two-dimensional grating that is positioned on the film, being shaped as of described film has three with the polygon of coboundary, and at least one border of this film is connected with back light apparatus, and other borders have reflectance coating.
Described condenser system also comprises the reflectance coating that is positioned at described film-substrate.
Described condenser system also comprises scattering film and the reflectance coating that is positioned at described film-substrate.
Described back light apparatus is connected with described film by waveguide.
Directly the cross section of the thin film boundary that is connected with described back light apparatus is the triangle tangent plane.
Described back light apparatus is solar panel or light guide plate.
Described two-dimensional grating is to make by metal material or can seeing the infrared band material transparent, as plastics, glass, organic polymer PMMA, acryl etc.
Described two-dimensional grating is relief type or index modulation type, and described two-dimentional relief type grating is that the pillar of projection, recessed hole, the annulus in single cycle or the donut in a plurality of cycles constitute; Described two-dimensional grating is the grating immediately that has triangular crystal lattice, rectangle lattice, accurate Jingjing lattice or have quasi-periodic structure.
Described film is plane or curved surface.
Described two-dimensional grating is perpendicular to described film surface or favour described film surface.
Described two-dimensional grating is positioned at the one side of film or two-sided.
Described reflectance coating is total reflection film or the direct evaporation metal aluminium film of high reflectance.
Described film is that one or more film is formed by stacking, the two-dimensional grating with different cycles of every film, corresponding to a plurality of wavelength, same one side of each film constitutes wedge shape, in order to being connected and the luminous energy guiding of described back light apparatus.The two sides of wedge shape scribbles highly reflecting films.
A series of tapered transmission lines are set on one side of described film, the afterbody of each tapered transmission line connects a straight tube waveguide, the other end of this straight wave guide is cut into quadrantal (spherical) triangle, this whole quadrantal (spherical) triangle is inserted in the light harvesting waveguide, and can be around described light harvesting waveguide rotation, the light process of this light harvesting waveguide enters described light guide plate with quadrantal (spherical) triangle waveguide, straight wave guide and the tapered transmission line that described light guide plate is connected successively.
The both sides of described tapered transmission line scribble highly reflecting films.
Described light harvesting waveguide is medium or metal cavitg.
Described light emitting diode on one side of described light guide plate and each light emitting diode be in the gap between each tapered transmission line that links to each other with described light guide plate.
Waveguide is optical fiber, or the refractive index that is embedded in surrounding medium is greater than the constituting the light wave material transparent of surrounding medium refractive index, and the geometric configuration of this light wave transparent material is wire or adjusts accordingly according to actual needs.
Compared with prior art the invention has the beneficial effects as follows, utilize two-dimensional grating that spatial light is converted to the membrane wave leaded light, by two-dimensional grating the incident light of different directions is changed, has the ability that luminous energy is collected in more effective diffraction coupling, can improve light gathering efficiency to wave band that should be different simultaneously.On solar lighting, littler to the dimensional requirement of chip, more save cost.
Description of drawings
Fig. 1 has the vertical view of first kind of embodiment of condenser system of optical grating construction for the present invention.
Fig. 2 has the outboard profile of first kind of embodiment of condenser system of optical grating construction for the present invention.
Fig. 3 has the vertical view of second kind of embodiment of condenser system of optical grating construction for the present invention.
Fig. 4 has the vertical view of the third embodiment of condenser system of optical grating construction for the present invention.
Fig. 5 has the outboard profile of the third embodiment of condenser system of optical grating construction for the present invention.
Fig. 6 has the vertical view of the 4th kind of embodiment of condenser system of optical grating construction for the present invention.
Fig. 7 has the vertical view of the 5th kind of embodiment of condenser system of optical grating construction for the present invention.
Fig. 8 has the vertical view of the 6th kind of embodiment of condenser system of optical grating construction for the present invention.
Fig. 9 has the vertical view of the 7th kind of embodiment of condenser system of optical grating construction for the present invention.
Embodiment
Below in conjunction with embodiment and accompanying drawing the present invention is elaborated, but should not limit protection scope of the present invention with this.
Please consult Fig. 1-Fig. 8 earlier, as shown in the figure, a kind of condenser system with optical grating construction, comprise the two-dimensional grating 5 that is positioned on the film 1, be positioned at the reflectance coating of described film 1 substrate, being shaped as of described film 1 has three with the polygon of coboundary, and at least one border of this film 1 is connected with back light apparatus, and other borders have reflectance coating 3.
Fig. 1 has the vertical view of first kind of embodiment of condenser system of optical grating construction for the present invention, Fig. 2 has the outboard profile of first kind of embodiment of condenser system of optical grating construction for the present invention, it namely is a kind of condenser system that is constituted by the single thin film with optical grating construction and solar panel 2, its structure is for arranging the column grating that two cycles are respectively a and b on film 1 surface, incident light enters on the film, and diffraction light satisfies K
0+ G=K
WaveguideThe time, the light of corresponding wavelength will be converted to along the light of film transmission.K wherein
0Be the wave vector of incident light, G is the reciprocal lattice vector of two-dimensional grating, K
WaveguideWaveguide mode for film.Two adjacent boundaries at film 1 directly connect solar panel.In order to improve the optical efficiency of solar cell, the film side that directly connects solar panel is made the triangle tangent plane.Shine on the solar panel and place these luminous energy guiding of reflectance coating at a relative other end.In order to improve the energy of collecting light, at the shady face (substrate) of film a reflectance coating is set again, make incident light can be reflected back toward grating and obtain coupling and utilize.
Fig. 3 has the overlooking of second kind of embodiment of condenser system of optical grating construction for the present invention, it also is the condenser system that is constituted by a kind of film 1 with rectangle lattice two-dimensional grating and the solar panel 2 that is connected by waveguide 4, on two borders of film 1, tapered transmission line and curved waveguide are set respectively, the other end of waveguide 4 is connected with solar panel 2, on film 1 border relative with the solar panel cell panel reflectance coating 3 is set, saves solar battery chip more.
Fig. 4 has the vertical view of the third embodiment of condenser system of optical grating construction for the present invention, Fig. 5 has the outboard profile of the third embodiment of condenser system of optical grating construction for the present invention, namely be a kind ofly to constitute condenser system by film and solar panel with two-sided two-dimensional medium post grating, solar panel is directly connected in adjacent two sides of film 1, and this film side is made the triangle tangent plane.All the other both sides arrange reflectance coating 3, are placed with reflectance coating at the shady face of film.
Fig. 6 is for the present invention has the vertical view of the 4th kind of embodiment of condenser system of optical grating construction, also is the condenser system that is made of the solar panel that many films with two-dimensional medium post grating were formed by stacking and were connected with waveguide.The two-dimensional grating with different cycles 5 of every film 1 corresponding to a plurality of wavelength, can be collected the light of different colours.Same one side of each film constitutes wedge shape becomes common joint portion, in order to being connected and luminous energy guiding of described back light apparatus, make the light of waveguide can converge to the end face of film at last, the shady face at bottom film arranges reflectance coating simultaneously, improves coupling efficiency.
Fig. 7 has the vertical view of the 5th kind of embodiment of condenser system of optical grating construction for the present invention, also be a kind of by the regular pentagon film with two-dimentional triangular crystal lattice optical grating construction and condenser system that solar panel constitutes, solar cell is arranged at the adjacent both sides of regular pentagon film, and its coboundary scribbles highly reflecting films.
Fig. 8 has the vertical view of the 6th kind of embodiment of condenser system of optical grating construction for the present invention, also be a kind of by the isosceles trapezoid film with two-dimensional grating structure and condenser system that solar panel constitutes, solar panel is directly connected in the bottom of trapezoidal film, and remaining border scribbles highly reflecting films.
Fig. 9 is for the present invention has the vertical view of the 7th kind of embodiment of condenser system of optical grating construction, also is a kind of by the film with two-dimensional grating structure be connected with the condenser system that the light guide plate of waveguide constitutes.A series of tapered transmission lines 6 are set on one side of film 1, the afterbody of each tapered transmission line 6 connects a straight tube waveguide 61, the other end of this straight wave guide 61 is cut into quadrantal (spherical) triangle 62, this whole quadrantal (spherical) triangle 62 is inserted in the light harvesting waveguide 7, and can be around described light harvesting waveguide 7 rotations, the light of this light harvesting waveguide 7 enters described light guide plate 8 through quadrantal (spherical) triangle waveguide 83, straight wave guide 82 and the tapered transmission line 81 that is connected with described light guide plate 8.Make that the light source of the light of grate film and liquid crystal panel is the same, the effect by light guide plate and diffuser plate becomes uniform area source.Described light emitting diode on one side of described light guide plate 8 and each light emitting diode be in the gap between each tapered transmission line 81 that links to each other with described light guide plate 8, realize the complementation of back light and thin film light source.
Claims (4)
1. condenser system with optical grating construction, be characterised in that its formation comprises two-dimensional grating (5) and the waveguide (4) that is positioned on the film (1), being shaped as of described film (1) has three with the polygon of coboundary, at least one border of this film (1) is connected with outside back light apparatus, other borders have reflectance coating (3), described back light apparatus is connected with described film (1) by waveguide (4), a series of tapered transmission lines (6) are set on one side of described film (1), the afterbody of each tapered transmission line (6) connects a straight tube waveguide (61), the other end of this straight tube waveguide (61) is cut into quadrantal (spherical) triangle (62), this whole quadrantal (spherical) triangle (62) is inserted in the light harvesting waveguide (7), and can be around described light harvesting waveguide (7) rotation, the quadrantal (spherical) triangle waveguide (83) of the light of this light harvesting waveguide (7) through being connected with light guide plate (8), straight wave guide (82) and tapered transmission line (81) enter described light guide plate (8).
2. as claims 1 described condenser system with optical grating construction, it is characterized in that two sides of described tapered transmission line scribble reflectance coating, described light harvesting waveguide (7) is medium or metal cavitg.
3. as claims 1 described condenser system with optical grating construction, it is characterized in that light emitting diode is arranged on one side of described light guide plate (8) and each light emitting diode is in gap between each tapered transmission line (81) that links to each other with described light guide plate (8).
4. as claims 1 described condenser system with optical grating construction, it is characterized in that, described waveguide is optical fiber, or be embedded in the surrounding medium light wave material transparent is constituted, the refractive index of this light wave transparent material is greater than the refractive index of surrounding medium, and the geometric configuration of this light wave transparent material is rectangle, ellipse or adjusts accordingly according to actual needs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102601818A CN102305959B (en) | 2011-09-05 | 2011-09-05 | Focusing system having grating structure |
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| CN2011102601818A CN102305959B (en) | 2011-09-05 | 2011-09-05 | Focusing system having grating structure |
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| CN102305959A CN102305959A (en) | 2012-01-04 |
| CN102305959B true CN102305959B (en) | 2013-09-11 |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015184581A1 (en) * | 2014-06-03 | 2015-12-10 | 华为技术有限公司 | 2d grating polarizing beam splitter and optical coherent receiver |
| CN104332510A (en) * | 2014-10-16 | 2015-02-04 | 中国科学院上海技术物理研究所 | Subwavelength plasmonic microcavity light coupling structure for promoting photoelectric detector response |
| CN105223642A (en) * | 2015-10-16 | 2016-01-06 | 武汉华星光电技术有限公司 | Light guide plate |
| CN113079228B (en) * | 2020-01-03 | 2022-09-23 | 华为技术有限公司 | Terminal equipment and display module |
| CN111812760B (en) * | 2020-08-06 | 2024-01-30 | 深圳珑璟光电技术有限公司 | Grating structure, optical waveguide and near-to-eye display system |
| CN113054044B (en) * | 2021-03-08 | 2022-08-05 | 合肥工业大学 | Monocrystalline silicon thin-film solar cell with double-layer period unmatched rotating rectangular grating structure |
| CN115494572A (en) * | 2021-06-18 | 2022-12-20 | 华为技术有限公司 | Front light module and display device |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5081615A (en) * | 1988-12-16 | 1992-01-14 | Fuji Photo Film Co., Ltd. | Method of coupling external light into an optical waveguide and a guided wave from an optical waveguide and optical pickup employing an optical waveguide |
| US5033812B1 (en) * | 1989-02-17 | 1993-10-12 | Sharp Kabushiki Kaisha | Grating coupler with a tapering waveguide for changing a coupling coefficient |
| US7253799B2 (en) * | 2001-06-30 | 2007-08-07 | Samsung Electronics Co., Ltd. | Backlight using planar hologram for flat display device |
| CN100385316C (en) * | 2006-01-05 | 2008-04-30 | 友达光电股份有限公司 | Matric full image backlight module having optical grating point |
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Effective date of registration: 20180105 Address after: Two road yasumine Huli District of Xiamen city in Fujian province 361000 No. 86 unit 316 Patentee after: XIAMEN WENANO PHOTOELECTRIC CO.,LTD. Address before: 200240 Dongchuan Road, Shanghai, No. 800, No. Co-patentee before: Xiamen Glorious Photoelectric Technology Co.,Ltd. Patentee before: Shanghai Jiao Tong University |
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Address after: 361000 unit 316, No. 86, anling 2nd Road, Huli District, Xiamen City, Fujian Province Patentee after: Xiamen Weina Photoelectric Technology Co.,Ltd. Address before: 361000 unit 316, No. 86, anling 2nd Road, Huli District, Xiamen City, Fujian Province Patentee before: XIAMEN WENANO PHOTOELECTRIC CO.,LTD. |
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