CN102305959A - Focusing system having grating structure - Google Patents
Focusing system having grating structure Download PDFInfo
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- CN102305959A CN102305959A CN201110260181A CN201110260181A CN102305959A CN 102305959 A CN102305959 A CN 102305959A CN 201110260181 A CN201110260181 A CN 201110260181A CN 201110260181 A CN201110260181 A CN 201110260181A CN 102305959 A CN102305959 A CN 102305959A
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- optical grating
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- grating construction
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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
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 surface 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.Like 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 convert the transmission light of waveguide into spatial light easily through grating.In addition, having the coupling grating that incline structure and bottom surface be added with catoptron also is suggested.But above patent is an 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 two-dimensional grating structure to realize coupling, the light of two polarization directions can be converted into along the light of film transmission, realize effective collection natural light to incident light.
Technical solution of the present invention is following:
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 polygons with the 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 through waveguide.
Directly the cross section of the thin film boundary that is connected with said 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 process by metal material or can seeing the infrared band material transparent, like 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 protruding pillar, 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 the 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, and corresponding to a plurality of wavelength, same one side of each film constitutes wedge shape, in order to guiding with being connected with luminous energy 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 gets into 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 said tapered transmission line scribble highly reflecting films.
Said 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 an 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 adjustment 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 into the membrane wave leaded light; Through 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 polygons with the 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 promptly is a kind of condenser system that constitutes by single thin film with optical grating construction and solar panel 2; Its structure is for being provided with 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 convert into 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 constitutes by a kind of film 1 with rectangle lattice two-dimensional grating and the solar panel 2 that is connected through 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, reflectance coating 3 is set, saves solar battery chip more with the solar panel cell panel.
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; Promptly 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 are provided with 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 up 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 guiding with being connected of described back light apparatus with luminous energy; Make the light of waveguide can converge to the end face of film at last, the shady face at bottom film is provided with 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 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 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 also is a kind of condenser system that is made up of film with two-dimensional grating structure and the light guide plate that is connected with waveguide for the present invention has the vertical view of the 7th kind of embodiment of condenser system of optical grating construction.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 gets into 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 light and liquid crystal panel of grate film is the same, the effect through light guide plate and diffuser plate becomes uniform surface light 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 said light guide plate 8, realize the complementation of back light and thin film light source.
Claims (16)
1. condenser system with optical grating construction; Be characterised in that its formation comprises the two-dimensional grating (5) that is positioned on the film (1); Being shaped as of described film (1) has three polygons with the coboundary; At least one border of this film (1) is connected with back light apparatus, and other borders have reflectance coating (3).
2. like claims 1 described condenser system, it is characterized in that described condenser system also comprises the reflectance coating that is positioned at described film (1) substrate with optical grating construction.
3. like claims 1 described condenser system, it is characterized in that described condenser system also comprises scattering film and the reflectance coating that is positioned at described film (1) substrate with optical grating construction.
4. like arbitrary described condenser system in claims 1 to 3, it is characterized in that described back light apparatus is connected with described film (1) through waveguide (4) with optical grating construction.
5. like arbitrary described condenser system in claims 1 to 3, it is characterized in that directly the cross section on film (1) border that is connected with said back light apparatus is the triangle tangent plane with optical grating construction.
6. like arbitrary described condenser system in claims 1 to 3, it is characterized in that described back light apparatus is solar panel (2) or light guide plate (8) with optical grating construction.
7. like arbitrary described condenser system in claims 1 to 3, it is characterized in that described two-dimensional grating (5) is to process to the material of infrared transparent by metal material or at visible light with optical grating construction.
8. like arbitrary described condenser system in claims 1 to 3 with optical grating construction; It is characterized in that; Described two-dimensional grating (5) is relief type or index modulation type, and described two-dimentional relief type grating is that protruding pillar, recessed hole, the annulus in single cycle or the donut in a plurality of cycles constitute; Described two-dimensional grating is the grating at random that has triangular crystal lattice, rectangle lattice, accurate Jingjing lattice or have quasi-periodic structure.
9. like arbitrary described condenser system in claims 1 to 3 with optical grating construction; It is characterized in that; Described film (1) is plane or curved surface, and described two-dimensional grating (5) is perpendicular to described film (1) surface or favour described film (1) surface.
10. like arbitrary described condenser system in claims 1 to 3, it is characterized in that described two-dimensional grating (5) is positioned at the one side of film (1) or two-sided with optical grating construction.
11., it is characterized in that described reflectance coating (3) is the total reflection film or the direct evaporation metal aluminium film of high reflectance like arbitrary described condenser system in claims 1 to 3 with optical grating construction.
12. like arbitrary described condenser system in claims 1 to 3 with optical grating construction; It is characterized in that; Described film (1) is that one or more film is formed by stacking; The two-dimensional grating with different cycles (5) of every film; Corresponding to a plurality of wavelength; Same one side of each film constitutes wedge shape, in order to guiding with being connected with luminous energy of described back light apparatus.
13. like claims 4 described condenser systems with optical grating construction; It is characterized in that; 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 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) rotation, the light of this light harvesting waveguide (7) gets into described LGP (8) through quadrantal (spherical) triangle waveguide (83), straight wave guide (82) and the tapered transmission line (81) that is connected with described LGP (8).
14., it is characterized in that two sides of said tapered transmission line scribble reflectance coating like claims 13 described condenser systems with optical grating construction, said light harvesting waveguide (7) is medium or metal cavitg.
15. like claims 13 described condenser systems with optical grating construction; It is characterized in that described light emitting diode is arranged on one side of described light guide plate (8) and each light emitting diode is in the gap between each tapered transmission line (81) that links to each other with said light guide plate (8).
16. like claims 4 described condenser systems with optical grating construction; It is characterized in that; Described waveguide is an 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 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 true CN102305959A (en) | 2012-01-04 |
| CN102305959B CN102305959B (en) | 2013-09-11 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN106415346A (en) * | 2014-06-03 | 2017-02-15 | 华为技术有限公司 | 2d grating polarizing beam splitter and optical coherent receiver |
| CN111812760A (en) * | 2020-08-06 | 2020-10-23 | 深圳珑璟光电技术有限公司 | Grating structure, optical waveguide and near-to-eye display system |
| CN113054044A (en) * | 2021-03-08 | 2021-06-29 | 合肥工业大学 | Monocrystalline silicon thin-film solar cell with double-layer period unmatched rotating rectangular grating structure |
| CN114787899A (en) * | 2020-01-03 | 2022-07-22 | 华为技术有限公司 | Terminal equipment and display module |
| WO2022262826A1 (en) * | 2021-06-18 | 2022-12-22 | 华为技术有限公司 | Front light module and display apparatus |
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| US5033812A (en) * | 1989-02-17 | 1991-07-23 | Sharp Kabushiki Kaisha | Grating coupler |
| 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 |
| US20040246743A1 (en) * | 2001-06-30 | 2004-12-09 | Lee Moon-Gyu | 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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2011
- 2011-09-05 CN CN2011102601818A patent/CN102305959B/en active Active
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| 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 |
| US5033812A (en) * | 1989-02-17 | 1991-07-23 | Sharp Kabushiki Kaisha | Grating coupler |
| US5033812B1 (en) * | 1989-02-17 | 1993-10-12 | Sharp Kabushiki Kaisha | Grating coupler with a tapering waveguide for changing a coupling coefficient |
| US20040246743A1 (en) * | 2001-06-30 | 2004-12-09 | Lee Moon-Gyu | 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 |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106415346A (en) * | 2014-06-03 | 2017-02-15 | 华为技术有限公司 | 2d grating polarizing beam splitter and optical coherent receiver |
| CN106415346B (en) * | 2014-06-03 | 2019-05-10 | 华为技术有限公司 | Two-dimensional grating polarization beam apparatus and light 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 |
| CN114787899A (en) * | 2020-01-03 | 2022-07-22 | 华为技术有限公司 | Terminal equipment and display module |
| CN111812760A (en) * | 2020-08-06 | 2020-10-23 | 深圳珑璟光电技术有限公司 | Grating structure, optical waveguide and near-to-eye display system |
| 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 |
| CN113054044A (en) * | 2021-03-08 | 2021-06-29 | 合肥工业大学 | Monocrystalline silicon thin-film solar cell with double-layer period unmatched rotating rectangular grating structure |
| WO2022262826A1 (en) * | 2021-06-18 | 2022-12-22 | 华为技术有限公司 | Front light module and display apparatus |
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| Publication number | Publication date |
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| CN102305959B (en) | 2013-09-11 |
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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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