CN102305959B - Focusing system having grating structure - Google Patents
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Abstract
一种具有光栅结构的聚光系统，包括位于薄膜上的二维光栅，薄膜的形状为具有三个以上边界的多边形，薄膜的至少一个边界连接有背光设备，其他边界具有反射膜。进一步降低薄膜聚光器的厚度，并有效利用太阳能,转化为室内照明、液晶面板的背光或者太阳能电池的照明，在太阳能照明上，对芯片的尺寸要求更小，更节省成本。
A light concentrating system with a grating structure, including a two-dimensional grating on a film, the shape of the film is a polygon with more than three borders, at least one border of the film is connected with a backlight device, and the other borders are provided with reflective films. Further reduce the thickness of the thin-film concentrator, and effectively use solar energy to convert it into indoor lighting, LCD panel backlight or solar cell lighting. In solar lighting, the size of the chip is required to be smaller and cost-saving.
Description
技术领域 technical field
本发明涉及照明和显示领域的光源获取技术领域，特别是涉及一种具有光栅结构的聚光系统。 The invention relates to the technical field of light source acquisition in the field of illumination and display, in particular to a light concentrating system with a grating structure.
背景技术 Background technique
在硅基光通讯中，由于作为光互连的波导尺寸比现有的光纤小很多，传统的端面对准耦合，光信号的输入和输出耦合效率很低，并且对对准的误差要求很高。为了提高耦合效率和降低对准的误差要求，利用光栅衍射实现输入光和波导之间的模式匹配被提出来。如美国专利US005081615A，公开了一种利用一维光栅实现空间光和薄膜波导模式之间的相互转换,而美国专利US5033812,公开了一种具有光栅的结构波导,通过光栅可以方便地把波导的传输光转换为空间光。除此之外，具有倾斜结构和底面加有反射镜的耦合光栅也被提出来。但是以上的专利是一维结构，只对应一个方向的偏振。 In silicon-based optical communication, since the size of the waveguide used as an optical interconnection is much smaller than that of the existing optical fiber, the traditional end-to-face aligned coupling, the input and output coupling efficiency of optical signals is very low, and the alignment error is very demanding. high. In order to improve the coupling efficiency and reduce the alignment error requirements, the use of grating diffraction to achieve mode matching between the input light and the waveguide is proposed. For example, U.S. Patent US005081615A discloses a one-dimensional grating to realize mutual conversion between spatial light and film waveguide modes, while U.S. Patent No. 5033812 discloses a structural waveguide with a grating, through which the transmission of the waveguide can be conveniently Light is converted to spatial light. In addition, coupling gratings with inclined structures and mirrors on the bottom surface have also been proposed. However, the above patents are one-dimensional structures, which only correspond to polarization in one direction.
发明内容 Contents of the invention
本发明的目的在于克服上述现有技术的缺陷，提供一种具有光栅结构的聚光系统，利用二维光栅结构实现对入射光的耦合,使两个偏振方向的光都可以转化为沿着薄膜传输的光,实现对自然光的有效收集。 The purpose of the present invention is to overcome the above-mentioned defects in the prior art, and to provide a light concentrating system with a grating structure, which uses a two-dimensional grating structure to realize the coupling of incident light, so that light in two polarization directions can be converted into The transmitted light realizes the effective collection of natural light.
本发明的技术解决方案如下： Technical solution of the present invention is as follows:
一种具有光栅结构的聚光系统，特点在于其构成包括位于薄膜上的二维光栅，所述的薄膜的形状为具有三个以上边界的多边形，该薄膜的至少一个边界连接有背光设备，其他边界具有反射膜。 A light concentrating system with a grating structure, characterized in that its composition includes a two-dimensional grating on a film, the shape of the film is a polygon with more than three boundaries, at least one boundary of the film is connected to a backlight device, and other The border has a reflective film.
所述的聚光系统还包括位于所述的薄膜衬底的反射膜。 The light concentrating system also includes a reflective film on the film substrate.
所述的聚光系统还包括位于所述的薄膜衬底的散射膜和反射膜。 The light concentrating system also includes a scattering film and a reflecting film on the film substrate.
所述的背光设备通过波导与所述的薄膜连接。 The backlight device is connected with the film through a waveguide.
直接与所述背光设备连接的薄膜边界的截面为三角形切面。 The section of the boundary of the film directly connected with the backlight device is a triangular section.
所述的背光设备是太阳能电池板或导光板。 The backlight device is a solar cell panel or a light guide plate.
所述的二维光栅是由金属材料或在可见到红外波段透明的材料制成，如塑料、玻璃、有机聚合物PMMA、压克力等。 The two-dimensional grating is made of metal materials or materials transparent in the visible to infrared bands, such as plastic, glass, organic polymer PMMA, acrylic and the like.
所述的二维光栅为浮雕型或折射率调制型，所述的二维浮雕型光栅是凸起的柱子、下凹的孔洞、单一周期的圆环或多个周期的同心圆环构成的；所述的二维光栅是具有三角晶格、矩形晶格、准晶晶格或具有准周期结构的随即光栅。 The two-dimensional grating is a relief type or a refractive index modulation type, and the two-dimensional relief grating is composed of raised pillars, concave holes, single-period rings or multiple-period concentric rings; The two-dimensional grating is a random grating with a triangular lattice, a rectangular lattice, a quasi-crystal lattice or a quasi-periodic structure.
所述的薄膜是平面或曲面。 The film is flat or curved.
所述的二维光栅垂直于所述的薄膜表面或倾斜于所述的薄膜表面。 The two-dimensional grating is perpendicular to the surface of the film or inclined to the surface of the film.
所述的二维光栅位于薄膜的一面或双面。 The two-dimensional grating is located on one side or both sides of the film.
所述的反射膜为高反射率的全反射膜或直接蒸镀金属铝膜。 The reflective film is a total reflective film with high reflectivity or directly vapor-deposited metal aluminum film.
所述的薄膜是一张或多张薄膜叠加而成，每张薄膜的具有不同周期的二维光栅，对应于多个波长，各个薄膜的同一边构成楔形，以利与所述的背光设备的连接和光能引导。楔形的两面涂有高反射膜。 The film is formed by stacking one or more films, each film has two-dimensional gratings with different periods, corresponding to multiple wavelengths, and the same side of each film forms a wedge shape, so as to facilitate the integration with the backlight device. Connection and Light Energy Guidance. Both sides of the wedge are coated with a highly reflective film.
所述的薄膜的一边上设置一系列锥形波导，每个锥形波导的尾部连接一个直管波导，该直波导的另一端切成直边三角形，该整个直边三角形插入一个集光波导内，并可以绕所述的集光波导旋转，该集光波导的光经过和所述的导光板依次连接的直边三角形波导、直波导和锥形波导进入所述的导光板。 A series of tapered waveguides are set on one side of the film, the tail of each tapered waveguide is connected to a straight tube waveguide, the other end of the straight waveguide is cut into a straight triangle, and the whole straight triangle is inserted into a light-collecting waveguide , and can rotate around the light-collecting waveguide, the light of the light-collecting waveguide enters the light-guiding plate through the straight-sided triangular waveguide, the straight waveguide and the tapered waveguide which are sequentially connected to the light-guiding plate.
所述锥形波导的两边涂有高反射膜。 Both sides of the tapered waveguide are coated with high reflection film.
所述集光波导是介质或者金属空腔。 The light-collecting waveguide is a dielectric or metal cavity.
所述的发光二极管位于所述的导光板的一边上并且每个发光二极管处于与所述的导光板相连的各锥形波导之间的间隙中。 The light emitting diodes are located on one side of the light guide plate and each light emitting diode is located in the gap between the tapered waveguides connected with the light guide plate.
波导是光纤，或是镶嵌在周围介质的折射率大于周围介质折射率的对光波透明的材料构成的，该光波透明材料的几何形状为线状或根据实际需要相应的调整。 The waveguide is made of optical fiber, or a material transparent to light wave embedded in the surrounding medium whose refractive index is higher than that of the surrounding medium. The geometric shape of the light wave transparent material is linear or adjusted according to actual needs.
与现有技术相比本发明的有益效果是，利用二维光栅把空间光转换为薄膜波导光，通过二维光栅对不同方向的入射光进行转换，具有更有效的衍射耦合收集光能的能力，同时可以对本应不同的波段，提高聚光效率。在太阳能照明上，对芯片的尺寸要求更小，更节省成本。 Compared with the prior art, the beneficial effect of the present invention is that the spatial light is converted into thin-film waveguide light by two-dimensional grating, and the incident light in different directions is converted by two-dimensional grating, which has a more effective ability of diffraction coupling to collect light energy , and at the same time, it can improve the light-gathering efficiency for different wavelength bands. In solar lighting, the size of the chip is required to be smaller and more cost-effective.
附图说明 Description of drawings
图1为本发明具有光栅结构的聚光系统第一种实施方式的俯视图。 Fig. 1 is a top view of the first embodiment of the light concentrating system with a grating structure according to the present invention.
图2为本发明具有光栅结构的聚光系统第一种实施方式的侧面图。 Fig. 2 is a side view of the first embodiment of the light concentrating system with a grating structure according to the present invention.
图3为本发明具有光栅结构的聚光系统第二种实施方式的俯视图。 Fig. 3 is a top view of the second embodiment of the light concentrating system with a grating structure according to the present invention.
图4为本发明具有光栅结构的聚光系统第三种实施方式的俯视图。 Fig. 4 is a top view of a third embodiment of a light concentrating system with a grating structure according to the present invention.
图5为本发明具有光栅结构的聚光系统第三种实施方式的侧面图。 Fig. 5 is a side view of a third embodiment of a light concentrating system with a grating structure according to the present invention.
图6为本发明具有光栅结构的聚光系统第四种实施方式的俯视图。 Fig. 6 is a top view of a fourth embodiment of a light concentrating system with a grating structure according to the present invention.
图7为本发明具有光栅结构的聚光系统第五种实施方式的俯视图。 Fig. 7 is a top view of a fifth embodiment of a light concentrating system with a grating structure according to the present invention.
图8为本发明具有光栅结构的聚光系统第六种实施方式的俯视图。 Fig. 8 is a top view of a sixth embodiment of a light concentrating system with a grating structure according to the present invention.
图9为本发明具有光栅结构的聚光系统第七种实施方式的俯视图。 Fig. 9 is a top view of a seventh embodiment of a light concentrating system with a grating structure according to the present invention.
具体实施方式 Detailed ways
下面结合实施例和附图对本发明作详细说明，但不应以此限制本发明的保护范围。 The present invention will be described in detail below in conjunction with the embodiments and accompanying drawings, but the protection scope of the present invention should not be limited thereby.
请先参阅图1-图8，如图所示，一种具有光栅结构的聚光系统，包括位于薄膜1上的二维光栅5，位于所述的薄膜1衬底的反射膜，所述的薄膜1的形状为具有三个以上边界的多边形，该薄膜1的至少一个边界连接有背光设备，其他边界具有反射膜3。
Please refer to Fig. 1-Fig. 8 first, as shown in the figure, a light concentrating system with a grating structure includes a two-
图1为本发明具有光栅结构的聚光系统第一种实施方式的俯视图，图2为本发明具有光栅结构的聚光系统第一种实施方式的侧面图，即是一种由具有光栅结构的单层薄膜和太阳能电池板2构成的聚光系统，其结构为在薄膜1表面上设置两个周期分别为a和b的柱状光栅，入射光进入到薄膜上，衍射光满足K0+G=Kwaveguide的时候，对应波长的光就会转换为沿着薄膜传输的光。其中K0为入射光的波矢，G为二维光栅的倒格矢，Kwaveguide为薄膜的波导模式。在薄膜1的两个相邻边界直接连接太阳能电池板。为了提高太阳能电池的光学效率，直接连接太阳能电池板的薄膜侧边做成三角形切面。而在相对的另外一端放置反射膜这些光能引导照射到太阳能电池板上。为了提高收集光的能量,在薄膜的背光面（衬底）再设置一个反射膜，使得入射光可以被反射回光栅得到耦合利用。
Fig. 1 is a top view of the first embodiment of the light concentrating system with a grating structure in the present invention, and Fig. 2 is a side view of the first embodiment of the light concentrating system with a grating structure in the present invention, that is, a light concentrating system with a grating structure The concentrating system composed of a single-layer film and a
图3为本发明具有光栅结构的聚光系统第二种实施方式的俯视，也是由一种具有矩形晶格二维光栅的薄膜1和通过波导4连接的太阳能电池板2构成的聚光系统，在薄膜1的两个边界上分别设置锥形波导和弯曲波导，波导4的另一端与太阳能电池板2连接，在和太阳能电池板电池板相对的薄膜1边界上设置反射膜3，更加节省太阳能电池芯片。
Fig. 3 is a top view of the second embodiment of the light concentrating system with a grating structure in the present invention, which is also a light concentrating system composed of a
图4为本发明具有光栅结构的聚光系统第三种实施方式的俯视图，图5为本发明具有光栅结构的聚光系统第三种实施方式的侧面图，即是一种由具有双面二维介质柱光栅的薄膜和太阳能电池板构成聚光系统，太阳能电池板直接连接于薄膜1的相邻两个侧边，该薄膜侧边做成三角形切面。其余两边设置反射膜3，在薄膜的背光面放置有反射膜。
Fig. 4 is a top view of the third embodiment of the light concentrating system with a grating structure in the present invention, and Fig. 5 is a side view of the third embodiment of the light concentrating system with a grating structure in the present invention, that is, a double-sided two-sided The thin film of the three-dimensional dielectric cylindrical grating and the solar battery panel form a concentrating system, and the solar battery panel is directly connected to two adjacent sides of the
图6为本发明具有光栅结构的聚光系统第四种实施方式的俯视图，也是由多张具有二维介质柱光栅的薄膜叠加而成和连接有波导的太阳能电池板构成的聚光系统。每张薄膜1的具有不同周期的二维光栅5，对应于多个波长，可以收集不同颜色的光。各个薄膜的同一边构成楔形成为共同的结合部，以利与所述的背光设备的连接和光能引导，使得波导的光最后可以会聚到薄膜的端面，同时在底层薄膜的背光面设置反射膜，提高耦合效率。
Fig. 6 is a top view of the fourth embodiment of the light concentrating system with a grating structure in the present invention, which is also a light concentrating system composed of a plurality of films with two-dimensional dielectric rod gratings superimposed and solar panels connected with waveguides. The two-
图7为本发明具有光栅结构的聚光系统第五种实施方式的俯视图，也是一种由具有二维三角晶格光栅结构的正五边形薄膜和太阳能电池板构成的聚光系统，太阳能电池设置于正五边形薄膜的相邻两边, 其余边界涂有高反射膜。 Fig. 7 is a top view of the fifth embodiment of the light concentrating system with a grating structure in the present invention, which is also a light concentrating system composed of a regular pentagonal film with a two-dimensional triangular lattice grating structure and a solar cell panel, the solar cell It is set on the adjacent two sides of the regular pentagon film, and the other boundaries are coated with high reflection film.
图8为本发明具有光栅结构的聚光系统第六种实施方式的俯视图，也是一种由具有二维光栅结构的等腰梯形薄膜和太阳能电池板构成的聚光系统，太阳能电池板直接连接于梯形薄膜的下底边, 其余的边界涂有高反射膜。 Fig. 8 is a top view of the sixth embodiment of the concentrating system with a grating structure in the present invention, which is also a concentrating system composed of an isosceles trapezoidal film with a two-dimensional grating structure and a solar cell panel, and the solar cell panel is directly connected to the The lower bottom edge of the trapezoidal film, and the rest of the border are coated with high reflection film.
图9为本发明具有光栅结构的聚光系统第七种实施方式的俯视图，也是一种由具有二维光栅结构的薄膜和连接有波导的导光板构成的聚光系统。薄膜1的一边上设置一系列锥形波导6，每个锥形波导6的尾部连接一个直管波导61，该直波导61的另一端切成直边三角形62，该整个直边三角形62插入一个集光波导7内，并可以绕所述的集光波导7旋转，该集光波导7的光经过和所述的导光板8连接的直边三角形波导83、直波导82和锥形波导81进入所述的导光板8。使得光栅薄膜的光和液晶面板的光源一样，通过导光板和扩散板的作用成为均匀的面光源。所述的发光二极管位于所述的导光板8的一边上并且每个发光二极管处于与所述导光板8相连的各锥形波导81之间的间隙中，实现背光光源和薄膜光源的互补。
Fig. 9 is a top view of a seventh embodiment of a light concentrating system with a grating structure according to the present invention, which is also a light concentrating system composed of a film with a two-dimensional grating structure and a light guide plate connected with a waveguide. A series of tapered
Claims (4)
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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| 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 |
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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 |
| EP0383627B1 (en) * | 1989-02-17 | 1996-05-08 | Sharp Kabushiki Kaisha | A grating coupler |
| WO2003004931A2 (en) * | 2001-06-30 | 2003-01-16 | Samsung Electro-Mechanics 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 | Backlight module of matrix hologram with grating points |
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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. |