Optical structure and design method of medium-and-small-angle light-mixing and color-mixing TIR lens

Abstract

The invention relates to the technical field of general illumination, in particular to an optical structure and design method of a medium and small angle light and color mixing TIR lens, the optical structure comprises a lens body, the lens body comprises a light inlet part and a light outlet part, and the light outlet part is arranged on one side of the light inlet part; a light inlet hole is formed in the light inlet part, a light inlet top surface is arranged at the top of the light inlet hole, the light inlet hole is provided with a light inlet side wall, and the light inlet part is provided with a total reflection side wall; a light-emitting hole is formed in the light-emitting part, the light-emitting hole is provided with a light-emitting bottom surface and a light-emitting side wall, the light-emitting part is provided with a horizontal light-emitting surface, and the light-emitting bottom surface forms an annular cambered surface with a convex edge and a concave middle; the TIR lens is mainly different from a conventional TIR lens in that the light-emitting bottom surface in the middle is changed from a single plane, a convex surface or a concave surface into an annular cambered surface with a convex edge and a concave middle. In this way, light rays collimated by the light inlet face of the convex lens can be divided into two parts by the light outlet face, two refraction light spots in different directions are obtained at the same time, and even light and color mixing of the refraction light spots can be achieved after the two refraction light spots are overlapped.

Description

Technical Field

[0001] The present application relates to the field of general lighting technology, and in particular to an optical structure and design method of a small to medium angle light mixing and color mixing TIR lens. Background Art

[0002] At present, various lighting fields have higher and higher requirements for light mixing and color mixing of small and medium-angle light spots, and increasingly hope to achieve uniform light mixing and color mixing of small and medium-angle light spots without obvious color difference without sacrificing efficiency. The main reasons for this lighting trend are as follows: First, in order to save costs, lamps began to use small-sized SMD light sources. However, due to structural limitations and uneven phosphor layers, SMD light sources are prone to edge yellowing of small and medium-angle light spots, resulting in obvious color difference. Second, with the popularization of smart home lighting, a large number of dual-color temperature light sources will be used, which inevitably involves color mixing of small and medium-angle light spots. Third, the color mixing effect of RGBW light sources in lighting fields such as stage lights is not good, and the color mixing of multi-color small-angle light spots still needs to be solved; For the common optical accessories currently on the market, neither reflective cups nor lenses can perfectly solve the problem of light mixing and color mixing at small and medium angles. Due to the natural structural defects of the reflective cup, a part of the light will inevitably go out directly without passing through the reflective cup, and the secondary light spot formed by this part of the light cannot be mixed. Convex lenses and TIR lenses are common in the field of lenses. A single convex lens can achieve small and medium angles but cannot achieve color mixing, otherwise total reflection is likely to occur, thereby reducing efficiency. For TIR lenses, its light spot is composed of the superposition of total reflection light spot and refraction light spot, while the common lenses on the market can only achieve color mixing of total reflection light spot, and do not achieve color mixing for refraction light spot, and do not mix the two parts of light at the same time, so that there are still defects in the color mixing of small and medium angle light spots. Therefore, further improvements can be made. Summary of the invention

[0003] In order to improve the light mixing and color mixing of a TIR lens for small and medium angle light spots, the present application provides an optical structure and a design method of a TIR lens for small and medium angle light mixing and color mixing.

[0004] In the first aspect, the present application provides an optical structure of a small- to medium-angle light-mixing and color-mixing TIR lens, which adopts the following technical solution: An optical structure of a small- to medium-angle light-mixing and color-mixing TIR lens, comprising a lens body, wherein the lens body comprises a light-entering portion and a light-emitting portion, wherein the light-emitting portion is arranged on one side of the light-entering portion; The light entrance portion is recessed inwardly away from the light exit portion to form a light entrance hole, the top of the light entrance hole is provided with a light entrance top surface protruding toward the bottom of the light entrance hole, the inner circumference of the light entrance hole is surrounded by a light entrance side wall, and the inner circumference of the light entrance portion is surrounded by a total reflection side wall; The light emitting portion is recessed inwardly on one side away from the light incident portion to form a light emitting hole, the bottom of the light emitting hole is provided with a light emitting bottom surface protruding toward the top of the light emitting hole, the inner circumference of the light emitting hole is surrounded by a light emitting side wall, and the light emitting portion is provided with a horizontal light emitting surface on one side away from the light incident portion; The light-emitting bottom surface comprises a first arc-shaped portion and a second arc-shaped portion, the first arc-shaped portion and the second arc-shaped portion are arranged adjacent to each other, the first arc-shaped portion comprises a first arc-shaped surface and a second arc-shaped surface, the second arc-shaped portion comprises a third arc-shaped surface and a fourth arc-shaped surface, the second arc-shaped surface is connected to the third arc-shaped surface and is recessed inwardly so that the light-emitting bottom surface forms an annular arc-shaped surface with convex edges and concave in the middle; Among them, the light incident hole receives external light, and the total reflection spot in the light is projected onto the total reflection side wall through the light incident side wall and refracted into a number of light rays, and the several refracted light rays are refracted out from the horizontal light emitting surface respectively, and the refracted light spot in the light is refracted into a number of light rays through the light incident top surface, and the several refracted light rays are refracted and refracted out from the edge and center of the annular arc surface with a convex edge and a concave middle on the light emitting bottom surface respectively in two opposite directions.

[0005] By adopting the above technical scheme, the light spot is mainly composed of a total reflection light spot and a refraction light spot. The light spot of the total reflection light spot is refracted by the light through the light incident side wall of the light incident hole to the total reflection side wall, and then the total reflection side wall reflects the light as non-cross light, and gradually transitions to the top of the light output part to reflect the light as cross light. All light passes through the horizontal light output surface and refracts, and converges at a point at a specific distance, thereby realizing the total reflection light spot color mixing; the refraction light spot is refracted by the light entering the top surface of the light hole to the light output bottom surface, and then the edge and center of the light output bottom surface respectively refract two opposite directions of light, and all light converges at a point at a specific distance, thereby realizing the refraction light spot color mixing.

[0006] Optionally, the diameter of the first curved surface is consistent with the diameter of the fourth curved surface, the diameter of the second curved surface is consistent with the diameter of the fourth curved surface, and the curvature of the arc line of the first curved surface is smaller than the curvature of the arc line of the second curved surface, so that the thickness of the light-emitting bottom surface forms a thin-thick-thin-thick-thin structure from the first curved surface to the fourth curved surface.

[0007] By adopting the above technical solution, the present invention is different from the conventional TIR lens mainly in that the light-emitting bottom surface in the middle of the lens is designed from a single plane lens, convex lens or concave lens to an annular convex lens, and the diameter of the light-emitting bottom surface in the cross section of the light-emitting bottom surface can be divided into four sections, namely the first arc surface, the second arc surface, the third arc surface, and the fourth arc surface. These four sections can look like a convex lens, a concave lens, a concave lens, and a convex lens from left to right, and the thickness changes from left to right as follows: thin-thick-thin-thick-thin; The light that has been collimated by the top light-incoming surface of the mirror body can be divided into two parts by the bottom light-emitting surface. One part of the light is converged, and the other part is dispersed, obtaining a converged light spot and a dispersed light spot respectively. By adjusting the length of the first arc surface, the second arc surface, the third arc surface, and the fourth arc surface and the curvature of the arc, the luminous flux and diameter of the light spot are consistent. After the two are superimposed, the refracted light spot can be mixed and mixed uniformly. Since the bottom light-emitting surface is divided into 4 sections, the corresponding structures of the two edge sections can be equivalent to a convex lens, which can converge the light to the center and prevent the light from propagating to both sides of the edge, thereby reducing the influence of the light on the side wall of the light-emitting surface and avoiding the reduction of efficiency. In addition, the curved surfaces at the upper and lower positions of the bottom light-emitting surface are designed with arc curvatures respectively, and two light spots in different directions are obtained by reflection at the same time, that is, the light spot formed by the cross light and the light spot formed by the non-cross light. The superposition of the two can achieve uniform light mixing and color mixing of the total reflection light spot, so the overall light spot formed by the refracted light spot plus the total reflection light spot can achieve uniform light mixing and color mixing.

[0008] Optionally, the light entrance hole is in a frustum shape that gradually shrinks from large to small toward the light exit hole.

[0009] By adopting the above technical solution, the frustum-conical design of the light entrance hole makes the light entering from the light entrance hole more focused, optimizes the light propagation path, reduces the loss of light energy, improves the light efficiency, and makes the light utilization rate higher.

[0010] Optionally, the light exit hole is in a frustum shape that gradually shrinks from large to small toward the light entrance hole.

[0011] By adopting the above technical solution, the frustum-conical design of the light output hole makes the light refracted from the light input hole into the light output hole more focused, optimizes the light propagation path, reduces the loss of light energy, improves the light efficiency, and makes the light utilization rate higher.

[0012] Optionally, the light entrance hole, the light entrance top surface, the light exit bottom surface and the light exit holes are all arranged with the same center line.

[0013] By adopting the above technical solution, when the light entrance hole, the light entrance top surface, the light exit bottom surface and the light exit hole are arranged with the same center line, the propagation path of light in the mirror body is made more symmetrical and concentrated, reducing the loss of light energy and thus improving the lighting effect.

[0014] Optionally, the light entrance portion is in a frustum shape that gradually expands from small to large toward the light exit portion.

[0015] By adopting the above technical solution, the light input part optimizes the propagation path of the light, reduces the loss of light energy, improves the light efficiency, and makes the utilization rate of light higher.

[0016] Optionally, the light emitting portion is cylindrical, the light emitting portion is arranged on a side of the light incident portion away from the light incident hole, and the length of the cross section of the light emitting portion is greater than the length of the cross section of the light emitting portion.

[0017] By adopting the above technical solution, light enters from the light entrance hole and is diverged into several light rays after refraction. Since the cross-sectional length of the light exit portion is large, its light focusing ability is improved, and the influence of the light on the total reflection side wall is reduced, so that the light exit portion can receive and refract more light, avoiding a decrease in the efficiency of light utilization.

[0018] Optionally, two sides of the cross section of the light incident portion are arc-shaped.

[0019] By adopting the above technical solution, the light input part optimizes the propagation path of the light, reduces the loss of light energy, improves the light efficiency, and makes the utilization rate of light higher.

[0020] Optionally, the light input portion and the light output portion are an integrally formed structure.

[0021] By adopting the above technical solution, the one-piece design reduces the reflection and scattering of light inside the light output part and the light input part of the mirror body, thereby improving the transmittance of light.

[0022] In the second aspect, the present application also provides a design method for a small- to medium-angle light-mixing and color-mixing TIR lens, which adopts the following technical solution: S1: Determine the lighting target, light source and other information, as well as the lens size characteristics, and design the optical path of the lens light entrance hole according to the requirements; S2: Light path design of total reflection optical surface: Design the light path design of cross light to form a light spot and the light path design of non-cross light to form a light spot respectively, so as to realize the mixed light pattern structure design of the light emitting surface of total reflection light; S3: Design of light-mixing pattern structure of the light-emitting surface of the annular convex lens: Design the light path design of the converging light spot and the light path design of the dispersing light spot respectively, so as to realize the light-mixing pattern structure design of the light-emitting surface of the annular convex lens; S4: Complete the optical design of the light-transmitting mirror according to the light-emitting surface mixed light pattern structure design of the total reflected light and the light-emitting surface mixed light pattern structure design of the annular convex lens; S5: After the optical design of the light-transmitting mirror is completed, the lens mold structure design and lens injection molding are carried out; S6: Finally, perform lens optical verification to ensure product quality.

[0023] In summary, the present application includes at least one of the following beneficial technical effects: 1. The light spot is mainly composed of a total reflection light spot and a refraction light spot. The light spot of the total reflection light spot is refracted from the light incident side wall of the light incident hole to the total reflection side wall, and then the total reflection side wall reflects the light as non-cross light, and gradually transitions to the top of the light outlet to reflect the light as cross light. All light passes through the horizontal light outlet surface and refracts, and converges at a point at a specific distance, thereby realizing the total reflection light spot color mixing; the refraction light spot is refracted from the light entering the top surface of the light hole to the light outlet bottom surface, and then the edge and center of the light outlet bottom surface refract two opposite directions of light, and all light converges at a point at a specific distance, thereby realizing the refraction light spot color mixing; 2. The main difference between the present invention and the conventional TIR lens is that the light-emitting bottom surface in the middle of the lens is designed from a single plane lens, convex lens or concave lens to an annular convex lens, and the diameter of the light-emitting bottom surface in the cross section of the light-emitting bottom surface can be divided into four sections, namely the first curved surface, the second curved surface, the third curved surface, and the fourth curved surface. These four sections can look like a convex lens, a concave lens, a concave lens, and a convex lens from left to right, and the thickness changes from left to right as follows: thin-thick-thin-thick-thin; the light collimated by the light-incident top surface of the mirror body can be divided into two parts by the light-emitting bottom surface, one part of the light is converged, and the other part of the light is dispersed, and a converged light spot and a dispersed light spot are obtained respectively. By adjusting the length of the first curved surface, the second curved surface, the third curved surface, and the fourth curved surface and the curvature of the arc, the luminous flux and diameter of the light spot are consistent, and the superposition of the two can achieve uniform light mixing and color mixing of the refracted light spot. Since the bottom surface of the light output is divided into 4 sections, the structures corresponding to the two edge sections are equivalent to convex lenses, which can converge the light to the center and prevent the light from propagating to the sides of the edge, thereby reducing the influence of the light output side wall and avoiding the reduction of efficiency. In addition, the curved surfaces at the upper and lower positions of the bottom surface of the light output are designed with arc curvatures respectively, and two light spots in different directions are obtained by reflection at the same time, that is, the light spot formed by the cross light and the light spot formed by the non-cross light. The superposition of the two can achieve uniform light mixing and color mixing of the total reflection light spot, so the overall light spot formed by the refracted light spot plus the total reflection light spot can achieve uniform light mixing and color mixing; 3. The light enters from the light entrance hole and diverges into several rays after refraction. Since the cross-sectional length of the light exit portion is large, its light-gathering ability is improved, and the influence of the total reflection side wall on the light is reduced, so that the light exit portion can receive and refract more light, avoiding the reduction of light utilization efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic cross-sectional view of the overall structure in the embodiment of the present application.

[0025] Figure 2 It is a schematic diagram of the light refraction state in the embodiment of the present application.

[0026] Figure 3 It is an enlarged schematic diagram of the light-emitting bottom surface in the embodiment of the present application.

[0027] Figure 4 It is a schematic top view of the overall structure in the embodiment of the present application.

[0028] Figure 5 It is a bottom view schematic diagram of the overall structure in the embodiment of the present application.

[0029] Figure 6 It is a schematic diagram of the flow chart of the convex lens design method in the embodiment of the present application.

[0030] Description of reference numerals: 1. Mirror body; 2. Light incident portion; 21. Light incident hole; 22. Light incident top surface; 23. Light incident side wall; 24. Total reflection side wall; 3. Light exit portion; 31. Light exit hole; 32. Light exit bottom surface; 321. First curved surface; 322. Second curved surface; 323. Third curved surface; 324. Fourth curved surface; 33. Light exit side wall; 34. Horizontal light exit surface. DETAILED DESCRIPTION

[0031] The following is combined with Figure 1-6 This application is described in further detail.

[0032] The embodiments of the present application disclose an optical structure of a small to medium angle light mixing and color mixing TIR lens.

[0033] Reference Figure 1 , 2 3. An optical structure of a small to medium angle light mixing and color mixing TIR lens includes a lens body 1, wherein the lens body 1 includes a light input portion 2 and a light output portion 3, wherein the light output portion 3 is arranged on the light output side of the light input portion 2, and the light output portion 3 and the light input portion 2 are an integrally formed structure.

[0034] The middle part of the light input portion 2 away from the light output portion 3 is recessed inward to form a light input hole 21, the light input hole 21 does not penetrate the light input portion 2, the top of the light input hole 21 protrudes toward the bottom of the light input hole 21 to form a light input top surface 22 for refracting light, a light input side wall 23 is arranged around the inner circumference of the light input hole 21 for refracting light, and a total reflection side wall 24 is arranged around the inner circumference of the light input portion 2 for receiving and refracting light refracted by the light input side wall 23; The middle part of the light emitting portion 3 away from the light incident portion 2 is recessed inward to form a light emitting hole 31, the light emitting hole 31 passes through the light emitting portion 3 and partially extends to the light incident portion 2, the bottom of the light emitting hole 31 protrudes toward the top of the light emitting hole 31 to form a light emitting bottom surface 32, and a light emitting side wall 33 is arranged around the inner circumference of the light emitting hole 31, and a horizontal light emitting surface 34 is arranged on the side of the light emitting portion 3 away from the light incident portion 2 for emitting light refracted by the light emitting bottom surface 32 and the total reflection side wall 24; The light incident hole 21 receives external light, and the total reflection spot in the light is projected toward the total reflection side wall 24 through the light incident side wall 23 to be refracted into a plurality of light rays, and the plurality of refracted light rays are refracted from the horizontal light emitting surface 34 respectively.

[0035] In the actual refraction process, the light spot of the total reflection light spot is refracted from the light incident side wall 23 of the light incident hole 21 to the total reflection side wall 24, and then the total reflection side wall 24 reflects the light as non-crossed light, and gradually transitions to the top of the light emitting portion 3 to reflect the light as crossed light. All light rays are refracted through the horizontal light emitting surface 34 and converge at a point at a specific distance, thereby realizing the total reflection light spot color mixing. Reference Figure 1 , 2 3. Specifically, in the present embodiment, in order to mix the refracted light spot evenly, the light-emitting bottom surface 32 includes a first arc-shaped portion and a second arc-shaped portion, the first arc-shaped portion and the second arc-shaped portion are arranged adjacent to each other, the first arc-shaped portion includes a first arc-shaped surface 321 and a second arc-shaped surface 322, the second arc-shaped portion includes a third arc-shaped surface 323 and a fourth arc-shaped surface 324, the second arc-shaped surface 322 and the third arc-shaped surface 323 are connected to each other, and the connection position is recessed inwardly so that the light-emitting bottom surface 32 forms an annular arc surface with convex edges and concave in the middle. From the cross section of the light-emitting bottom surface 32, the horizontal diameter D13 of the first arc-shaped surface 321 is equal to the horizontal diameter D4 of the fourth arc-shaped surface 324. As a result, the diameter D2 of the second curved surface 322 is consistent with the diameter D3 of the third curved surface 323 in the horizontal direction, the arc curvature of the first curved surface 321 is smaller than the arc curvature of the second curved surface 322, and the arc curvature of the fourth curved surface 324 is smaller than the arc curvature of the third curved surface 323, so that the thickness of the light-emitting bottom surface 32 forms a thin-thick-thin-thick-thin structure from the first curved surface 321 to the fourth curved surface 324, wherein the refracted light spot in the light is refracted into a plurality of light rays through the light-incident top surface 22, and the plurality of refracted light rays are respectively refracted from the edge and center of the annular curved surface of the light-emitting bottom surface 32 with a convex edge and a concave middle, and refracted into two opposite directions.

[0036] In the actual refraction process, the refracted light spot is refracted from the light entering the top surface of the light hole 21 to the light emitting bottom surface 32, and then the edge and center of the light emitting bottom surface 32 respectively refract two light rays in opposite directions, and all the light rays converge at one point at a specific distance, thereby realizing the color mixing of the refracted light spot.

[0037] The main difference between the present invention and the conventional TIR lens is that the light-emitting bottom surface 32 in the middle of the lens is designed from a single plane lens, convex lens or concave lens to an annular convex lens, and the diameter of the light-emitting bottom surface 32 in the cross section of the light-emitting bottom surface 32 can be divided into four sections, namely the first arc surface 321, the second arc surface 322, the third arc surface 323, and the fourth arc surface 324. These four sections can look like a convex lens, a concave lens, a concave lens, and a convex lens from left to right, and the thickness changes from left to right as follows: thin-thick-thin-thick-thin; The light that has been collimated by the incident light top surface 22 of the mirror body 1 can be divided into two parts by the light emitting bottom surface 32, one part of the light is converged, and the other part of the light is dispersed, respectively obtaining a converged light spot and a dispersed light spot. By adjusting the length of the first curved surface 321, the second curved surface 322, the third curved surface 323, and the fourth curved surface 324, as well as the curvature of the arc, the luminous flux and diameter of the light spot are consistent, and the two can be superimposed to achieve uniform light mixing and color mixing of the refracted light spot. Since the light emitting bottom surface 32 is divided into 4 sections, the structures corresponding to the two edge sections can be equivalent to a convex lens, which can converge the light to the center and prevent the light from propagating to both sides of the edge, thereby reducing the influence of the light on the light emitting side wall 33 and avoiding the reduction of efficiency. In addition, the curved surfaces at the upper and lower positions of the light emitting bottom surface 32 are designed with arc curvatures respectively, and two light spots in different directions are reflected at the same time, namely the light spot formed by cross light and the light spot formed by non-cross light. The superposition of the two can achieve uniform light mixing and color mixing of the total reflection light spot, so the overall light spot formed by the refracted light spot plus the total reflection light spot can achieve uniform light mixing and color mixing.

[0038] Reference Figure 1 , 4 5. Specifically, in the present embodiment, the light entrance hole 21, the light entrance top surface 22, the light exit bottom surface 32 and the light exit hole 31 are all arranged on the same center line. When the light entrance hole 21, the light entrance top surface 22, the light exit bottom surface 32 and the light exit hole 31 are arranged on the same center line, the propagation path of light in the mirror body 1 is made more symmetrical and concentrated, thereby reducing the loss of light energy, thereby improving the light efficiency.

[0039] Reference Figure 1 , 4 5. Specifically, in this embodiment, the light entrance hole 21 is in a truncated cone shape that gradually shrinks from large to small toward the light exit hole 31, and the light exit hole 31 is in a truncated cone shape that gradually shrinks from large to small toward the light entrance hole 21. The design of both being truncated cones makes the light entering from the light entrance hole 21 more focused, optimizes the propagation path of the light, reduces the loss of light energy, improves the light efficiency, and makes the utilization rate of the light higher.

[0040] Reference Figure 1 , 4, 5. Specifically, in the present embodiment, the light output portion 3 is cylindrical, the light output portion 3 is arranged on the side of the light input portion 2 away from the light input hole 21, the light output hole 31 is opened in the middle of the light input portion 2, and the length of the cross section of the light output portion 3 is greater than the length of the cross section of the light output portion 3.

[0041] During the actual lighting process, light enters from the light entrance hole 21 and is diverged into several light rays after refraction. Since the cross-sectional length of the light exit portion 3 is relatively large, its light focusing ability is improved, and the influence of the light on the total reflection side wall 24 is reduced, so that the light exit portion 3 can receive and refract more light, avoiding a reduction in the efficiency of light utilization.

[0042] Reference Figure 1 , 4 5. Specifically, in this embodiment, the light input portion 2 is in a truncated cone shape that gradually expands from small to large toward the light output portion 3, and both sides of the cross section of the light input portion 2 are arc-shaped. The light input portion 2 optimizes the propagation path of light, reduces the loss of light energy, improves light efficiency, and makes the utilization rate of light higher.

[0043] The implementation principle of the optical structure of a small and medium angle mixed light and color mixing TIR lens in the embodiment of the present application is as follows: the light spot of the total reflection light spot is refracted by the light through the light incident side wall 23 of the light incident hole 21 to the total reflection side wall 24, and then the total reflection side wall 24 reflects the light as non-cross light, and gradually transitions to the top of the light output portion 3 to reflect the light as cross light, all light rays are refracted through the horizontal light output surface 34, and converge at a point at a specific distance, thereby realizing the total reflection light spot color mixing; the refracted light spot is refracted by the light entering the top surface of the light hole 21 to the light output bottom surface 32, and then the edge and center of the light output bottom surface 32 respectively refract two light rays in opposite directions, and all light rays converge at a point at a specific distance, thereby realizing the refracted light spot color mixing, and the superposition of the two can realize uniform light mixing and color mixing of the total reflection light spot, so the overall light spot formed by the refracted light spot plus the total reflection light spot can achieve uniform light mixing and color mixing.

[0044] The embodiments of the present application also disclose a method for designing a small to medium angle light-mixing and color-mixing TIR lens.

[0045] Reference Figure 1 , 6 , a design method of a small to medium angle light mixing and color mixing TIR lens includes: S1: Determine the lighting target, light source and other information, as well as the lens size characteristics, and design the optical path of the lens light entrance hole 21 according to the requirements; S2: Light path design of total reflection optical surface: Design the light path design of cross light to form a light spot and the light path design of non-cross light to form a light spot respectively, so as to realize the mixed light pattern structure design of the light emitting surface of total reflection light; S3: Design of light-mixing pattern structure of the light-emitting surface of the annular convex lens: Design the light path design of the converging light spot and the light path design of the dispersing light spot respectively, so as to realize the light-mixing pattern structure design of the light-emitting surface of the annular convex lens; S4: Complete the optical design of the light-transmitting mirror according to the light-emitting surface mixed light pattern structure design of the total reflected light and the light-emitting surface mixed light pattern structure design of the annular convex lens; S5: After the optical design of the light-transmitting mirror is completed, the lens mold structure design and lens injection molding are carried out; S6: Finally, perform lens optical verification to ensure product quality.

[0046] The embodiments of this specific implementation are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. The same components are represented by the same figure marks. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An optical structure of a small to medium angle light mixing and color mixing TIR lens, characterized in that: The mirror body (1) comprises a light input portion (2) and a light output portion (3), wherein the light output portion (3) is arranged on one side of the light input portion (2); The light entrance portion (2) is recessed inwardly on one side away from the light exit portion (3) to form a light entrance hole (21); the top of the light entrance hole (21) is provided with a light entrance top surface (22) protruding toward the bottom of the light entrance hole (21); the inner circumference of the light entrance hole (21) is surrounded by a light entrance side wall (23); and the inner circumference of the light entrance portion (2) is surrounded by a total reflection side wall (24); The light emitting portion (3) is recessed inwardly on a side away from the light incident portion (2) to form a light emitting hole (31); the inner bottom of the light emitting hole (31) is provided with a light emitting bottom surface (32) protruding toward the top of the light emitting hole (31); the inner circumference of the light emitting hole (31) is provided with a light emitting side wall (33); and the side of the light emitting portion (3) away from the light incident portion (2) is provided with a horizontal light emitting surface (34); The light-emitting bottom surface (32) comprises a first arc-shaped portion and a second arc-shaped portion, the first arc-shaped portion and the second arc-shaped portion are arranged adjacent to each other, the first arc-shaped portion comprises a first arc-shaped surface (321) and a second arc-shaped surface (322), the second arc-shaped portion comprises a third arc-shaped surface (323) and a fourth arc-shaped surface (324), the second arc-shaped surface (322) is connected to the third arc-shaped surface (323) and is recessed inwardly so that the light-emitting bottom surface (32) forms an annular arc-shaped surface with a convex edge and a concave center; The light entrance hole (21) receives external light, and the total reflection spot in the light is projected onto the total reflection side wall (24) through the light entrance side wall (23) to be refracted into a plurality of light rays, and the plurality of refracted light rays are respectively refracted out from the horizontal light exit surface (34), and the refracted light spot in the light is refracted into a plurality of light rays through the light entrance top surface (22), and the plurality of refracted light rays are respectively refracted out from the edge and center of the annular arc surface of the light exit bottom surface (32) which is convex at the edge and concave in the middle to form two kinds of light rays in opposite directions.

2. The optical structure of the medium and small angle light mixing and color mixing TIR lens according to claim 1, characterized in that: The diameter of the first curved surface (321) is consistent with the diameter of the fourth curved surface (324), the diameter of the second curved surface (322) is consistent with the diameter of the fourth curved surface (324), and the curvature of the arc line of the first curved surface (321) is smaller than the curvature of the arc line of the second curved surface (322), so that the thickness of the light-emitting bottom surface (32) forms a thin-thick-thin-thick-thin structure from the first curved surface (321) to the fourth curved surface (324).

3. The optical structure of the medium and small angle light mixing and color mixing TIR lens according to claim 1, characterized in that: The light entrance hole (21) is in the shape of a truncated cone that gradually shrinks from large to small in the direction of the light exit hole (31).

4. The optical structure of the medium and small angle light mixing and color mixing TIR lens according to claim 1, characterized in that: The light exit hole (31) is in the shape of a truncated cone that gradually shrinks from large to small in the direction of the light entrance hole (21).

5. According to the optical structure of the small- to medium-angle light-mixing and color-mixing TIR lens of claim 1, the light entrance hole (21), the light entrance top surface (22), the light exit bottom surface (32) and the light exit hole (31) are all arranged on the same center line.

6. The optical structure of the medium and small angle light mixing and color mixing TIR lens according to claim 1, characterized in that: The light entrance portion (2) is in the shape of a truncated cone that gradually expands from small to large in the direction of the light exit portion (3).

7. The optical structure of the medium and small angle light mixing and color mixing TIR lens according to claim 6, characterized in that: The light-emitting portion (3) is cylindrical, the light-emitting portion (3) is arranged on a side of the light-incoming portion (2) away from the light-incoming hole (21), and the length of the cross section of the light-emitting portion (3) is greater than the length of the cross section of the light-emitting portion (3).

8. The optical structure of the medium and small angle light mixing and color mixing TIR lens according to claim 6, characterized in that: Both sides of the cross section of the light incident portion (2) are arc-shaped.

9. The optical structure of the medium and small angle light mixing and color mixing TIR lens according to claim 1, characterized in that: The light input portion (2) and the light output portion (3) are integrally formed structures.

10. A design method for a small-to-medium-angle light-mixing and color-mixing TIR lens, based on the optical structure of the small-to-medium-angle light-mixing and color-mixing TIR lens of any one of claims 1 to 9, characterized in that: S1: Determine the lighting target, determine the light source and other information, and determine the lens size characteristics, and design the optical path of the lens light entrance hole (21) according to the requirements; S2: Light path design of total reflection optical surface: Design the light path design of cross light to form a light spot and the light path design of non-cross light to form a light spot respectively, so as to realize the mixed light pattern structure design of the light emitting surface of total reflection light; S3: Design of light-mixing pattern structure of the light-emitting surface of the annular convex lens: Design the light path design of the converging light spot and the light path design of the dispersing light spot respectively, so as to realize the light-mixing pattern structure design of the light-emitting surface of the annular convex lens; S4: Complete the optical design of the light-transmitting mirror according to the light-emitting surface mixed light pattern structure design of the total reflected light and the light-emitting surface mixed light pattern structure design of the annular convex lens; S5: After the optical design of the light-transmitting mirror is completed, the lens mold structure design and lens injection molding are carried out; S6: Finally, perform lens optical verification to ensure product quality.

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