Condensation unit combined by total reflection prisms and condensation system combined by multiple light paths

Abstract

The invention provides a condensation unit combined by total reflection prisms and a condensation system combined by multiple light paths. The condensation unit is formed by combining a first total reflection prism and a second total reflection prism. The upper surface of the first total reflection prism is a light receiving surface and a light condensing surface of the whole light condensing unit, the lower surface of the first total reflection prism is a catadioptric light transmitting surface matched with the second total reflection prism, and the side surface of the first total reflection prism is a light emergent surface; the second total reflection prism is located on the lower left portion of the first total reflection prism and is a prism array light guide plate composed of a plurality of prisms, the upper surface of each prism is a prismatic light-transmitting face, the lower surface of each prism is a high reflection face, and the side face of each prism is a light emitting face. The light condensation unit and the multi-light-path combined light guide light condensation cavity are integrally combined to form a light guide light condensation system with a large light receiving area and high light condensation multiplying power. The combined condensation system is of a closed optical structure, static tracking-free efficient condensation can be achieved, and the combined condensation system can be widely applied to the fields of light guide illumination, condensation power generation, heat collection and energy storage and the like.

Description

Technical Field

[0001] The invention relates to the field of optical technology, and in particular to a focusing unit of a total reflection prism combination and a focusing system of a multi-light path combination. Background Art

[0002] Using focusing technology to increase the energy flux density of sunlight is a key development direction in the fields of optical lighting, concentrated power generation, and thermal energy storage. Developing a new generation of tracking-free optical focusing systems is one of the main technical paths for people to achieve economical, efficient, safe and convenient use of sunlight resources.

[0003] The purpose of developing a light-conducting focusing system is to achieve tracking-free and efficient focusing under conditions of large changes in the incident angle of sunlight while also having a lightweight structure. Although there are many related technologies and documents disclosed using the light-conducting focusing method, the common problems existing in the prior art are: limited by the tracking-free and lightweight structure, the light-conducting concentrator has a small light receiving area and a limited light receiving angle. The light energy loss in the process of introducing sunlight into the light guide plate and the light guide plate transmitting light energy is large, resulting in low efficiency. In addition, it is difficult to combine multiple existing light-conducting concentrators into a large-area, high-efficiency, high-power focusing system, resulting in the current tracking-free light-conducting focusing technology and related products have not yet been commercially applied on a large scale. Research and development of tracking-free light-conducting focusing technology and new focusing systems that solve the above problems are the key directions for promoting development and progress in this field through comprehensive and efficient use of solar energy. Summary of the invention

[0004] In order to solve the above problems existing in the prior art, the purpose of the present invention is to provide a focusing unit composed of a total reflection prism combination and a focusing system composed of a multi-light path combination, so as to achieve the purpose of improving the overall light energy transmission efficiency and focusing ratio of the light guide focusing system.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is: A focusing unit of a total reflection prism combination and a focusing system of a multi-light path combination, wherein the focusing unit is composed of a first total reflection prism and a second total reflection prism; the first total reflection prism has a refractive index of n1, a top angle of α1, and a width of L1, and an angle of α0 between its upper surface and the horizontal plane, and is both a light receiving surface of the first total reflection prism and a focusing surface of the entire focusing unit; the lower surface is a refracting and reflecting light transmission surface adapted to the second total reflection prism, and the side surface is a light emitting surface; the second total reflection prism has a refractive index of n2, a bottom width of L2, is located at the lower left of the first total reflection prism, and is a prism array light guide plate composed of a plurality of prisms with prism angles of α2 and β2, respectively, and a height of h; the upper surface of the prism is a prism-shaped light transmission surface, the lower surface is a high-reflection surface, and the side surface is a light emitting surface.

[0006] Furthermore, the focusing system is composed of a plurality of focusing units and a multi-light path focusing cavity; the multi-light path focusing cavity is composed of a plurality of large-angle light total reflection light guide prisms, an upper reflection plate, and a lower reflection plate; the top angle of the total reflection light guide prism is α, the bottom angle is β, the light receiving surface width is d1, the upper surface is the light receiving surface, the bottom surface is the light reflecting surface, the surface is coated with a high-reflection optical film, the side surface is the light emitting surface, and the surface shape is a plane or a curved surface or a curved surface; the plurality of total reflection light guide prisms are located on the same horizontal plane according to the upper surface, and the width of the focusing unit is d1. They are arranged in sequence and spaced apart in accordance with the position of the outgoing light, forming an incident light receiving surface of the multi-light path focusing cavity; the upper reflection plate is parallel to the upper surface of the total reflection light-guiding prism or is located on the same plane, and is installed within the spacing between multiple total reflection light-guiding prisms; the lower reflection plate is a zigzag reflection surface, located below the total reflection light-guiding prism and the upper reflection plate, connected to the bottom surface of the first total reflection light-guiding prism, corresponding to the bottom surface of the total reflection light-guiding prism and the reflection plane of the upper reflection plate, and is segmented to form a zigzag reflection surface that is parallel to both the bottom surface of the total reflection light-guiding prism and the reflection surface of the upper reflection plate.

[0007] A first condensing lens group is installed on the light emitting end face of the condensing unit to improve the condensing magnification; the material refractive index of the first condensing lens group is n3, and its refractive index n3≤(n1,n2).

[0008] A third condensing lens group is installed on the light output end face of the multi-path condensing cavity, so that the height inside the condensing cavity is h 21 、h 22 、h 23 The light is further converged to an exit height d2.

[0009] A reflective element is installed above each total reflection light guide prism of the multi-light path focusing cavity to guide the light emitted by each focusing unit to the light receiving surface of the total reflection light guide prism.

[0010] In order to realize an array combination of multiple light-guiding focusing units and further improve the efficiency and focusing optical magnification of the light-guiding focusing system, the present invention also provides another focusing unit of a total reflection prism combination and a focusing system of a multi-light path combination, wherein the focusing unit of the total reflection prism combination is composed of a first total reflection prism, a second total reflection prism, a first light guide cavity, and a second light guide cavity as an integral combination; the first total reflection prism is both a light receiving prism of the focusing unit and a light-guiding focusing prism of the entire focusing unit, and its refractive index is n1, and its two acute angles are α1 and β1 respectively, the width of the light receiving surface is L1, and the height of the light exit surface is d, wherein the upper surface is the reference positioning surface of the entire focusing unit, which is both the light receiving surface of the first total reflection prism and the total reflection light-guiding focusing surface of the entire focusing unit, the side surface is the light exit surface, and the lower surface is connected to the reflection surface arranged below it. The folding surface forms a first light-guiding cavity; the refractive index of the second total reflection prism is n2, and the two acute angles are α2 and β2 respectively. It is obliquely installed at the lower left of the first total reflection prism, β2 is connected to the vertex angle of α1, the upper surface is a light receiving surface with a width of L3, and the inclination angle with the reference plane of the first total reflection prism is β3, the lower surface is a light reflecting surface, the surface is coated with a high-reflection optical film, the side is a light emitting surface with a height of h, and is connected to the first light-guiding cavity; the second light-guiding cavity is composed of a transparent window with a width of L2, a reflecting surface with an inclination angle of α3 with the reference plane of the first total reflection prism, and a light receiving surface of the second total reflection prism, wherein the transparent window and the light receiving surface of the first total reflection prism are located on the same plane; all the light received by the second light-guiding cavity is incident on the upper surface of the second total reflection prism, and is refracted by the second total reflection prism and then emitted to the first light-guiding cavity.

[0011] Furthermore, a second condensing lens group is installed on the light emitting end face of the condensing unit to improve the condensing magnification; the material refractive index of the second condensing lens group is n3, and its refractive index n3≤(n1,n2).

[0012] Compared with the prior art, the beneficial effects of the present invention are: 1) The present invention adopts a unique combination design of two total reflection light-guiding prisms, so that the first total reflection light-guiding prism has both the light receiving function of a single prism and the dual function of a light-guiding focusing prism of the entire focusing unit, thereby simplifying the optical path structure of the light-guiding focusing unit and improving the light energy transmission efficiency.

[0013] 2) The multi-light path combined focusing cavity designed in the present invention effectively solves the problem that multiple light guide concentrators are difficult to combine into one, and provides a solution for light guide concentrating technology to achieve a larger light receiving area and a higher focusing ratio.

[0014] 3) The optical system of the present invention has a simple structure and can form a fully enclosed optical system, which is easy to install and maintain. The designed product not only uses materials that are easily available, but also has mature industrial manufacturing technology, good economic efficiency, and is easy to be promoted and applied.

[0015] The present invention can be used to construct an efficient light-guiding lighting system, a concentrated power generation system, and a concentrated photothermal system, and has a wide range of application scenarios and good market promotion prospects in the field of comprehensive utilization of solar energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of a light focusing unit of a total reflection prism combination of the present invention; Figure 2 It is a schematic diagram of the structure of the focusing system of the total reflection prism combination and the multi-light path combination of the present invention; Figure 3 It is a schematic diagram of the structure of a focusing unit of another total reflection prism combination of the present invention. DETAILED DESCRIPTION

[0017] The preferred embodiments of the present invention are described below with reference to the accompanying drawings.

[0018] like Figure 1 As shown, a total reflection prism combination focusing unit is composed of a first total reflection prism (101) and a second total reflection prism (102).

[0019] The first total reflection prism (101) has a refractive index of n1, a vertex angle of α1, and a width of L1, denoted as (A1B1C1), wherein the angle between the upper surface (A1B1) and the horizontal plane is α0, and is both the light receiving surface of the first total reflection prism (101) and the light focusing surface of the total reflection light guide prism of the entire light focusing unit, the lower surface (A1C1) is a refracting and reflecting light transmission surface adapted to the second total reflection prism (102), and the side surface (B1C1) is a light emitting surface; The second total reflection prism (102) has a refractive index of n2 and a bottom width of L2, is located at the lower left of the first total reflection prism (101), and is denoted as (A2B2C2D2). It is a prism array light guide plate composed of a plurality of prisms with prism angles of α2 and β2, respectively, and a height of h, wherein the upper surface (A2B2C2) is a prism-shaped light-transmitting surface, the lower surface (A2D2) is a high-reflection surface, and the side surface (C2D2) is a light emitting surface.

[0020] A focusing lens group (103) is installed on the light emitting end face (B1C1-C2D2) of the focusing unit of the total reflection prism combination, and the material refractive index of the focusing lens group (103) is n3, and its refractive index n3≤(n1, n2).

[0021] like Figure 2 As shown, a focusing unit of a total reflection prism combination and a focusing system of a multi-light path combination is formed by integrating a plurality of focusing units and a multi-light path focusing cavity.

[0022] Figure 2 The multi-light path focusing cavity shown in the figure is composed of three total reflection light-guiding prisms (201) (K 21 , K 22 , K 23 ) is combined with an upper reflection plate (202) and a lower reflection plate (203); The total reflection light-guiding prism (201) has a wedge angle of α, a bottom angle of β, a light receiving surface width of d1, an upper surface (AC) being a light receiving surface, a bottom surface (AB) being a light reflecting surface, the surface being plated with a high-reflection optical film, a side surface (BC) being a light emitting surface, and a surface shape being a plane, a curved surface, or a curved surface; 3 total reflection light guide prisms K 21 , K 22 , K 23 The upper surface (AC) is located in the same horizontal plane, and is arranged in sequence and spaced apart to match the width of the focusing unit and the position of the outgoing light, forming the incident light receiving surface of the focusing cavity of the three light path channels; The upper reflection plate (202) and the total reflection light guide prism K 21 , K 22 , K 23 The upper surfaces (AC) of the three total reflection light guide prisms K are parallel or located on the same plane. 21 , K 22 , K 23 Install within the spacing between each other; The lower reflection plate (203) is a zigzag reflection surface and is located at the total reflection light guide prism K 21 , K 22 , K 23 Below the upper reflection plate (202), and the first total reflection light guide prism K 21 The reflection surface (AB) is connected to the total reflection light guide prism K 22 , K 23 The inclined bottom surface (AB) and the reflecting plane of the upper reflecting plate (202) are segmented to form a total reflection light guide prism K 22 , K 23 The bottom surface (AB) is parallel to the curved reflecting surface (BDEFG) and is also parallel to the reflecting surface of the upper reflecting plate (202), and the height of the light focusing cavity formed is h 21 、h 22 、h 23 .

[0023] A focusing lens group (205) is installed on the light emitting end face (GH) of the focusing cavity of the multi-light path combination, so that the height inside the focusing cavity is h 21 、h 23 、h 33 The light rays converge at an exit height d2, which further increases the focusing ratio of the focusing system.

[0024] A reflective element (204) is installed above each total reflection light guide prism (201) of the multi-light path light focusing cavity to guide the light emitted by each light focusing unit to the light receiving surface (AC) of the total reflection light guide prism (201).

[0025] like Figure 3 As shown, another light focusing unit of the total reflection prism combination is composed of a first total reflection prism (301), a second total reflection prism (302), a first light guide cavity (303), and a second light guide cavity (304) combined into one body.

[0026] The first total reflection prism (301) is marked as (A1B1C1), has a refractive index of n1, two acute angles α1 and β1 respectively, a light receiving surface width of L1, and an output light height of d; wherein the upper surface (A1B1) is a horizontal reference positioning surface of the entire light focusing unit, is both a light receiving surface of the first total reflection prism (301) and a total internal reflection light guiding light guiding surface of the entire light focusing unit, thereby achieving the purpose that the first total reflection prism (301) is both a light receiving prism of the light focusing unit and a total internal reflection light guiding light guiding prism of the entire light focusing unit, the side surface (B1C1) is a light output surface, and the lower surface (A1C1) and the reflection refracting surface (C2G-GC1) located therebelow form a first light guiding cavity (303); The second total reflection prism (302) is marked as (A2B2C2), has a refractive index of n2, and two acute angles of α2 and β2 respectively. The second total reflection prism (302) is installed obliquely at the lower left of the first total reflection prism (301) with the upper surface (A1B1) of the first total reflection prism (301) as a reference plane, (∠A2B2C2) is in contact and connected with (∠B1A1C1), the upper surface (A2B2) is an incident light receiving surface with a width of L3, and has an inclination angle of β3 with the reference plane (A1B1) of the first total reflection prism (301), the lower surface (A2C2) is a light reflecting surface, and is coated with a high-reflection optical film, the side surface (B2C2) is a light emitting surface with a height of h, and is connected to the first light guide cavity (303); The second light guide cavity (304) is marked as (A0B2A2), and is composed of a transparent window (A0B2) with a width of L2, a reflection surface (A0A2) with an inclination angle of α3 to the horizontal plane, and a light receiving surface (A2B2) of the second prism, wherein the transparent window (A0B2) and the light receiving surface (A1B1) of the first prism (301) are located on the same plane; all the light received by the second light guide cavity (304) is incident on the (A2B2) surface of the second total reflection prism (302), and then emitted to the first light guide cavity (303) after being refracted; A focusing lens group (305) is installed on the light emitting end face of the focusing unit; the focusing lens group (305) is marked as (B1C1EF), is integrated with the light emitting surface (B1C1) of the first total reflection light guide prism (301), and is composed of a parallel light guide tube with a material refractive index of n3 and a height of d and a focusing lens, and the refractive index n3≤n1; like Figure 3 As shown, the upper light guiding surface (B1E) of the light pipe is a reflective surface, the lower light guiding surface (C1F) is a transparent surface, (EF) is a light emitting surface; and the lower reflective refractive surface of the first light guiding cavity (303) of the focusing unit equipped with the above-mentioned focusing lens group (305) is (C2G-GF).

[0027] The above-mentioned total reflection light-guiding prism is made of materials such as optical glass or optical plastic, and is manufactured using mature optical cold processing methods or hot pressing, compression molding, 3D printing and other methods. The above-mentioned high-reflection optical film can be manufactured by physical vapor deposition.

[0028] The above description is only a description of an example of the present invention and does not limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solution of the present invention by technicians in this field should fall within the protection scope determined by the claims of the present invention.

Claims

1. A focusing unit of a total reflection prism combination and a focusing system of a multi-light path combination, characterized in that: The light focusing unit is composed of a first total reflection prism (101) and a second total reflection prism (102); the first total reflection prism (101) has a refractive index of n1, a top angle of α1, and a width of L1; the angle between its upper surface and the horizontal plane is α0, and it is both the light receiving surface of the first total reflection prism (101) and the light focusing surface of the entire light focusing unit; the lower surface is a refracting and reflecting light transmission surface adapted to the second total reflection prism (102), and the side surface is a light emitting surface; the second total reflection prism (102) has a refractive index of n2 and a bottom width of L2, is located at the lower left of the first total reflection prism (101), and is a prism array light guide plate composed of a plurality of prisms having prism angles of α2 and β2 and a height of h; the upper surface of the prism is a prism-shaped light transmission surface, the lower surface is a high-reflection surface, and the side surface is a light emitting surface.

2. The focusing unit of a total reflection prism combination and a focusing system of a multi-light path combination according to claim 1, characterized in that: The focusing system is formed by integrating a plurality of focusing units and a multi-light path focusing cavity; the multi-light path focusing cavity is formed by integrating a plurality of large-angle light total reflection light guide prisms (201), an upper reflection plate (202), and a lower reflection plate (203); the total reflection light guide prism (201) has a top angle of α, a bottom angle of β, a light receiving surface width of d1, an upper surface being a light receiving surface, a bottom surface being a light reflecting surface, a surface of which is plated with a high-reflection optical film, and a side surface being a light emitting surface, a surface shape of which is a plane or a curved surface or a curved surface; the plurality of total reflection light guide prisms (201) are located on the same horizontal plane according to the upper surfaces, and are arranged in sequence to match the width of the focusing unit and the position of the emitted light. The plurality of total reflection light guide prisms (201) are arranged at intervals to form an incident light receiving surface of the multi-light path focusing cavity; the upper reflection plate (202) is parallel to or located on the same plane as the upper surface of the total reflection light guide prism (201), and is installed within the spacing between the plurality of total reflection light guide prisms (201); the lower reflection plate (203) is a zigzag reflection surface, located below the total reflection light guide prism (201) and the upper reflection plate (202), connected to the bottom surface of the first total reflection light guide prism, corresponding to the bottom surface of the total reflection light guide prism (201) and the reflection plane of the upper reflection plate (202), and is segmented to form a zigzag reflection surface that is parallel to both the bottom surface of the total reflection light guide prism (201) and the reflection surface of the upper reflection plate.

3. The focusing unit of the total reflection prism combination and the focusing system of the multi-light path combination according to claim 2, characterized in that: A first condensing lens group (103) is installed on the light emitting end face of the condensing unit to increase the condensing magnification; the material refractive index of the first condensing lens group (103) is n3, and its refractive index n3≤(n1, n2).

4. The focusing unit of the total reflection prism combination and the focusing system of the multi-light path combination according to claim 2, characterized in that: A third condensing lens group (205) is installed on the light output end face of the multi-light path condensing cavity, so that the height inside the condensing cavity is h 21 、h 22 、h 23 The light is further converged to an exit height d2.

5. The focusing unit of the total reflection prism combination and the focusing system of the multi-light path combination according to claim 2, characterized in that: A reflective element (204) is installed above each total reflection light guide prism (201) of the multi-light path light focusing cavity to guide the light emitted by each light focusing unit to the light receiving surface of the total reflection light guide prism (201).

6. A focusing unit of a total reflection prism combination and a focusing system of a multi-light path combination, characterized in that: The light-collecting unit of the total reflection prism combination is composed of a first total reflection prism (301), a second total reflection prism (302), a first light-guiding cavity (303), and a second light-guiding cavity (304) formed by an integrated combination; the first total reflection prism (301) is both a light-receiving prism of the light-collecting unit and a light-guiding light-collecting prism of the entire light-collecting unit, and has a refractive index of n1, two acute angles of α1 and β1, a light-receiving surface width of L1, and a light-emitting surface height of d, wherein the upper surface is the reference positioning surface of the entire light-collecting unit, which is both the light-receiving surface of the first total reflection prism (301) and the total reflection light-guiding light-collecting surface of the entire light-collecting unit, the side surface is the light-emitting surface, and the lower surface and the reflective refracting surface arranged below it form the first light-guiding cavity (303); the second total reflection prism (302) has a refractive index of n2, two acute angles of α2 and β2, and is installed at an angle. At the lower left of the first total reflection prism (301), β2 is connected to the top angle of α1, the upper surface is a light receiving surface with a width of L3 and an inclination angle of β3 with the reference plane of the first total reflection prism (301), the lower surface is a light reflecting surface, the surface is plated with a high-reflection optical film, the side surface is a light emitting surface with a height of h, and is connected to the first light guiding cavity (303); the second light guiding cavity (304) is composed of a transparent window with a width of L2, a reflecting surface with an inclination angle of α3 with the reference plane of the first total reflection prism (301), and a light receiving surface of the second total reflection prism (302), wherein the transparent window and the light receiving surface of the first total reflection prism (301) are located on the same plane; all the light received by the second light guiding cavity (304) is incident on the upper surface of the second total reflection prism, is refracted by the second total reflection prism (302), and then emitted to the first light guiding cavity (303).

7. The focusing unit of the total reflection prism combination and the focusing system of the multi-light path combination according to claim 6, characterized in that: A second condensing lens group (305) is installed on the light emitting end face of the condensing unit to increase the condensing magnification; the material refractive index of the second condensing lens group (305) is n3, and its refractive index n3≤(n1, n2).

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