Light guide condenser of catadioptric prism combined structure

Abstract

The invention provides a light guide condenser of a catadioptric prism combined structure. The light guide condenser is formed by combining an upper light guide plate, a first catadioptric prism, a second catadioptric prism and a lower light guide plate into a whole. The upper light guide plate is a wedge-shaped light guide plate with an acute angle; the first refraction-reflection prism and the second refraction-reflection prism are prism arrays formed by sequentially arranging a plurality of prisms with acute angles; the lower light guide plate is a wedge-shaped light guide plate with an acute angle, and the bottom surface of the lower light guide plate is a high-reflection surface. The prism angles of the first refraction and reflection prism and the second refraction and reflection prism are vertically and oppositely matched; and a conical condenser or a condensing lens group is mounted on a light emergent surface. Light rays in a large incident angle variation range can be transversely propagated by changing the propagation direction and path of the light to achieve light guide condensation, and the combined condenser has the light and thin structural characteristic and is suitable for various application scenes of static tracking-free condensation and illumination. Products manufactured through the method can be widely applied to the fields of light guide illumination, light condensation power generation, heat collection energy storage and the like.

Description

Technical Field

[0001] The invention relates to the field of optical technology, and in particular to a light-guiding concentrator with a refracting and reflecting prism combination structure. Background Art

[0002] Using focusing technology to increase the energy flux density of sunlight is a key development direction in new energy fields such as optical lighting, concentrated power generation, and thermal energy storage. Developing a new generation of tracking-free optical concentrators 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 guide concentrator is to achieve the goal of achieving efficient focusing of sunlight without tracking under conditions of large incident angle variations while also having a thin and light structure. Although there are many related technologies and documents disclosed using the light guide focusing method, the common problem faced is: how to guide light with a large incident angle variation range in a certain area into the light guide plate and form efficient convergence under the premise of a thin and light structure. At present, there is no good solution to this problem in the world, which hinders the application, promotion and development of light guide focusing technology.

[0004] Due to the regularity of the sun's trajectory over the earth, the incident direction of sunlight is constantly changing, and the direction of the incident light is different from the direction of light propagation in the light guide plate. The key to solving the above problem is how to change the propagation direction and path of the ever-changing incident light so that the incident light can be effectively introduced into the light guide plate and form a total reflection effect to achieve efficient focusing. Summary of the invention

[0005] In order to solve the above-mentioned problems existing in the prior art, the purpose of the present invention is to provide a light-guiding concentrator with a refractive-reflective prism combination structure, which can guide light with a large incident angle variation range into the light-guiding plate to form a total internal reflection effect by changing the propagation direction and path of the light to achieve the purpose of efficient focusing.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is: A light-guiding concentrator of a folding and reflecting prism combination structure, which is composed of an upper light-guiding plate, a first folding prism, a second folding prism and a lower light-guiding plate arranged in sequence from top to bottom; the upper light-guiding plate is a wedge-shaped light-guiding plate with an acute angle α1; the first folding prism is a prism array composed of a plurality of prisms with an acute angle α2 arranged in sequence; the second folding prism is a prism array composed of a plurality of prisms with an acute angle α3 arranged in sequence; the lower light-guiding plate is a wedge-shaped light-guiding plate with an acute angle α4, and its bottom surface is a high-reflection surface; the prism angles of the first folding prism and the second folding prism are relatively matched up and down, and the structures between the lower surface of the upper light-guiding plate and the upper surface of the first folding prism, and between the lower surface of the second folding prism and the upper surface of the lower light-guiding plate are the first air wedge and the second air wedge, respectively.

[0007] Furthermore, the bottom surface of each single prism constituting the first folding and reflecting prism array is coated with a high-reflection optical film.

[0008] A conical condenser or a condensing lens group is installed on the light emitting surface of the light guide condenser to further improve the condensing magnification.

[0009] Compared with the prior art, the beneficial effects of the present invention are as follows: 1) The present invention adopts the optical structure design of "upper light guide plate-air wedge-first folding prism-second folding prism-air wedge-lower light guide plate", so that light with a large angle variation range can be effectively introduced into the upper and lower light guide plates by changing the propagation direction and path of the light and satisfying the total reflection condition to form lateral propagation and converge to the light exit surface, thereby achieving the purpose of tracking-free and efficient focusing.

[0010] 2) The light-guiding concentrator and related products constructed by the present invention can realize fully enclosed static tracking-free operation, and are easy to install and maintain, have good economy, and are easy to be applied and promoted. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of a light-guiding concentrator of a refracting-reflecting prism combination structure of the present invention; Figure 2 It is a schematic diagram of the combined structure of a group of light guide concentrators of the present invention. DETAILED DESCRIPTION

[0012] The structure, light path refraction path and multiple condenser combination of the present invention are described in detail below in conjunction with the accompanying drawings and embodiments.

[0013] like Figure 1 As shown, the upper light guide plate 01, the first folding prism 02, the second folding prism 03 and the lower light guide plate 04 are arranged in sequence from top to bottom in the order of 01-04, the prism angles of the first folding prism 02 and the second folding prism 03 are relatively matched up and down, a first air wedge 05 is arranged between the lower surface of the upper light guide plate 01 and the upper surface of the first folding prism 02, and a second air wedge 06 is arranged between the lower surface of the second folding prism 03 and the upper surface of the lower light guide plate 04, and the above structures are combined into one to form a light guide concentrator.

[0014] The upper light guide plate 01 is a wedge-shaped light guide plate with an acute angle α1, marked as A1B1C1, wherein the upper surface A1B1 is the light receiving surface, and the side surface B1C1 is the light emitting surface. Light rays with different incident directions and incident angles within the αs angle range are marked as P1-P0-P2, and are incident from the A1B1 surface to the interior of the upper light guide plate 01, wherein the light rays that are obliquely incident and meet the total reflection condition (light rays P1 shown in the figure) propagate laterally to the light emitting surface B1C1 for convergence, and the light rays that do not meet the total reflection condition (light rays P0 and P2 shown in the figure) are refracted to the first refracting prism 02.

[0015] The first folding prism 02 is a prism array composed of a plurality of prisms with an acute angle of α2 and marked as A2B2C2, which are arranged in sequence. A first air wedge 05 is provided between the upper surface A2B2 and the lower surface A1C1 of the upper light guide plate 02. The lower surface A2C2 can be either a highly reflective surface or a transparent surface. The A2C2 surface shown in the figure is a highly reflective surface. The light P2 transmitted from the upper light guide plate 01 to the first folding prism 02 is folded back into the upper light guide plate via the A2C2 surface, and propagates laterally to the light emitting surface B1C1 to converge, satisfying the total reflection condition. The light P0 is folded and reflected via the A2C2 surface to the second folding prism 03.

[0016] The second folding prism 03 is a prism array composed of a plurality of prisms marked A3B3C3 with an acute angle of α3 arranged in sequence, which is relatively adapted to the prism angle of the first folding prism 02 up and down, and an air wedge 06 is provided between the A3C3 surface and the upper surface A4B4 of the lower light guide plate 04.

[0017] The lower light guide plate 04 is a wedge-shaped light guide plate with an acute angle α4, marked as A4B4C4, where the A4B4 surface is the light receiving surface, and the bottom surface A4C4 is a reflective surface coated with a highly reflective optical film. The P0 light is refracted by the second folding prism 03 and is incident on the light guide plate 04 to meet the total reflection condition and propagate laterally to converge on the light exit surface B4C4.

[0018] In order to further improve the focusing efficiency and focusing ratio of the emitted light, a conical condenser or a condensing lens group 07 is installed on the light emitting surface.

[0019] like Figure 2 As shown, the size of the optical waveguide concentrator of the present invention can be reduced or enlarged according to different usage scenarios. It can be used independently or in combination of multiple ones. It can be installed horizontally or tilted. The figure shows a schematic diagram of the combined structure formed by two miniaturized optical waveguide concentrators arranged horizontally and symmetrically on the left and right, wherein the left side is optical waveguide concentrator No. 1 08, the right side is optical waveguide concentrator No. 2 09, and the middle is the focusing receiver 10.

[0020] The above is only a description of the structure, optical path and concentrator combination structure 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 light-guiding concentrator with a combined structure of catadioptric prisms, characterized in that: The invention is composed of an upper light guide plate (01), a first folding prism (02), a second folding prism (03) and a lower light guide plate (04) which are arranged in sequence from top to bottom; the upper light guide plate (01) is a wedge-shaped light guide plate with an acute angle α1; the first folding prism (02) is a prism array composed of a plurality of prisms with an acute angle α2 arranged in sequence; the second folding prism (03) is a prism array composed of a plurality of prisms with an acute angle α3 arranged in sequence; The lower light guide plate (04) is a wedge-shaped light guide plate with an acute angle α4, and its bottom surface is a high-reflection surface; the prism angles of the first folding prism (02) and the second folding prism (03) are relatively matched up and down, and the structures between the lower surface of the upper light guide plate (01) and the upper surface of the first folding prism (02), and between the lower surface of the second folding prism (03) and the upper surface of the lower light guide plate (04) are respectively a first air wedge (05) and a second air wedge (06).

2. The light guide concentrator of the combined structure of catadioptric prisms according to claim 1, characterized in that: The bottom surface of each single prism constituting the first folding and reflecting prism (02) array is coated with a high-reflection optical film.

3. The light guide concentrator of the combined structure of catadioptric prisms according to claim 1, characterized in that: A conical condenser or a condensing lens group (07) is installed on the light emitting surface of the light guide condenser to further improve the condensing magnification.

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