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

Abstract

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, comprising a lens body, the lens body comprising a light input portion and a light output portion, the light output portion being arranged on one side of the light input portion; the light input portion forming a light input hole, the light input hole being provided with a light input top surface at the top, the light input hole being provided with light input side walls, and the light input portion being provided with a total reflection side wall; the light output portion forming a light output hole, the light output hole being provided with a light output bottom surface, the light output hole being provided with light output side walls, the light output portion being provided with a horizontal light output surface, and the light output bottom surface forming an annular arc surface with convex edges and concave in the middle; the main difference between the present invention and a conventional TIR lens is that the light output bottom surface of the middle light output bottom surface is changed from a single plane, convex surface or concave surface to an annular arc surface with convex edges and concave in the middle. In this way, the light collimated by the light input surface of the convex lens can be divided into two parts by the light output surface, and two refracted light spots in different directions are obtained at the same time. When the two are superimposed, uniform light mixing and color mixing of the refracted light spots can be achieved.

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 TIR lens for mixing light and color at small and medium angles. 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. They 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 and medium-angle light spots still needs to be solved;

[0003] Among the common optical accessories currently available on the market, neither reflectors nor lenses can perfectly solve the problem of light mixing and color mixing for small and medium-angle light spots. Due to the inherent structural defects of reflectors, some light will inevitably escape directly without passing through the reflector, and the secondary light spots formed by this light cannot be mixed or colored. Common lenses in the lens field include convex lenses and TIR lenses. While a single convex lens can achieve color mixing at small and medium angles, it cannot achieve color mixing, otherwise it is prone to total reflection, thereby reducing efficiency. For TIR lenses, their light spots are composed of a superposition of total reflection and refraction. However, common lenses on the market only achieve color mixing for total reflection, and do not achieve color mixing for refraction. They do not simultaneously mix the two components of light, resulting in defects in color mixing for small and medium-angle light spots. Therefore, further improvement is possible. Summary of the Invention

[0004] 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.

[0005] In the first aspect, the present application provides an optical structure of a small to medium angle light and color mixing TIR lens, which adopts the following technical solution:

[0006] 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 entrance portion and a light exit portion, wherein the light exit portion is arranged on one side of the light entrance portion;

[0007] 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;

[0008] The light emitting portion is recessed inwardly on a 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 convex 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 a side away from the light incident portion;

[0009] The light-emitting bottom surface includes a first arc-shaped portion and a second arc-shaped portion, the first arc-shaped portion and the second arc-shaped portion are adjacently arranged, the first arc-shaped portion includes a first arc-shaped surface and a second arc-shaped surface, the second arc-shaped portion includes 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;

[0010] In which, the light entrance hole receives external light, and the total reflection spot in the light is projected onto the total reflection side wall through the light entrance side wall and refracted into a number of light rays, and the several refracted light rays are refracted out from the horizontal light exit surface respectively, and the refracted light spot in the light is refracted into a number of light rays through the light entrance top surface, and the several refracted light rays are refracted into two opposite directions from the edge and center of the annular arc surface with convex edges and concave middle parts of the light exit bottom surface and refracted out.

[0011] By adopting the above technical solution, 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 light rays in opposite directions, and all light rays converge at a point at a specific distance, thereby realizing the refraction light spot color mixing.

[0012] 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.

[0013] By adopting the above technical solution, the present invention differs from conventional TIR lenses primarily in that the light-emitting bottom surface in the middle of the lens is designed as an annular convex lens instead of a single flat lens, convex lens, or concave lens. The diameter of the bottom surface in a cross-section can be divided into four segments: a first curved surface, a second curved surface, a third curved surface, and a fourth curved surface. These four segments, from left to right, appear as a convex lens, a concave lens, a concave lens, and a convex lens. The thickness changes from left to right in the following order: thin-thick-thin-thick-thin.

[0014] After the light is collimated by the top light-entering surface of the mirror body, it 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 curved surface, the second curved surface, the third curved surface, and the fourth curved surface, as well as the curvature of the arc, the luminous flux and diameter of the light spot are made consistent. When the two are superimposed, uniform light mixing and color mixing of the refracted light spot can be achieved. Since the bottom light-emitting surface is divided into four 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 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 simultaneous reflection, namely 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.

[0015] Optionally, the light entrance hole is in a frustum shape that gradually shrinks from large to small toward the light exit hole.

[0016] 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.

[0017] Optionally, the light exit hole is in a frustum shape that gradually shrinks from large to small toward the light entrance hole.

[0018] 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.

[0019] Optionally, the light entrance hole, the light entrance top surface, the light exit bottom surface and the light exit holes are all arranged on the same center line.

[0020] 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 on 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 efficiency.

[0021] Optionally, the light entrance portion is in a frustum shape that gradually expands from small to large toward the light exit portion.

[0022] 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.

[0023] 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.

[0024] By adopting the above technical solution, light enters from the light entrance hole and diverges 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 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.

[0025] Optionally, both sides of the cross section of the light incident portion are arc-shaped.

[0026] 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.

[0027] Optionally, the light input portion and the light output portion are an integrally formed structure.

[0028] 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.

[0029] In a 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:

[0030] S1: Determine the lighting target, light source, and lens size characteristics, and design the optical path of the lens entrance hole according to the requirements;

[0031] S2: Light path design of the total reflection optical surface: Design the light path design of the cross light to form the light spot and the light path design of the non-cross light to form the light spot respectively, so as to realize the light mixing pattern structure design of the light emitting surface of the total reflection light;

[0032] S3: Design of the light-mixing pattern structure of the light-emitting surface of the annular convex lens: Design the optical path design of the converging light spot and the optical path design of the dispersed light spot respectively, so as to realize the design of the light-mixing pattern structure of the light-emitting surface of the annular convex lens;

[0033] S4: Complete the optical design of the light-transmitting mirror based on the light-emitting surface mixed pattern structure design of the total reflected light and the light-emitting surface mixed pattern structure design of the annular convex lens;

[0034] S5: After the optical design of the light-transmitting mirror is completed, the lens mold structure design and lens injection molding are carried out;

[0035] S6: Finally, perform lens optical verification to ensure product quality.

[0036] In summary, this application includes at least one of the following beneficial technical effects:

[0037] 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 formed by the light refracting 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, gradually transitioning 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 formed by the light entering the top surface of the light hole and refracting to the light output bottom surface, and then the edge and center of the light output bottom surface refract two light rays in opposite directions respectively. All light rays converge at a point at a specific distance, thereby realizing the refraction light spot color mixing;

[0038] 2. The main difference between the present invention and conventional TIR lenses is that the light-emitting bottom surface in the middle of the lens is designed from a single flat lens, convex lens, or concave lens to an annular convex lens. The diameter of the light-emitting bottom surface in the cross-section of the light-emitting bottom surface can be divided into four sections: the first curved surface, the second curved surface, the third curved surface, and the fourth curved surface. These four sections can be viewed from left to right as a convex lens, a concave lens, a concave lens, and a convex lens, with thickness varying from left to right in the order of thin-thick-thin-thick-thin. Light collimated by the light-entering top surface of the lens body can be divided into two parts by the light-emitting bottom surface, with one part of the light being converged and the other part being dispersed, resulting in a converged light spot and a dispersed light spot, respectively. By adjusting the length and curvature of the first, second, third, and fourth curved surfaces, the luminous flux and diameter of the light spot are made consistent. When the two are superimposed, uniform light mixing and color mixing of the refracted light spot can be achieved. Since the bottom surface of the light output is divided into four sections, the structures corresponding to the two edge sections are equivalent to convex lenses, which can converge light toward the center and prevent light from propagating to the sides of the edges, thereby reducing the influence of the light output side walls and avoiding a decrease in 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 reflected at the same time, namely 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. Therefore, the overall light spot formed by the refracted light spot plus the total reflection light spot can achieve uniform light mixing and color mixing.

[0039] 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 larger, 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

[0040] Figure 1 It is a schematic cross-sectional view of the overall structure in the embodiment of the present application.

[0041] Figure 2 It is a schematic diagram of the light refraction state in the embodiment of the present application.

[0042] Figure 3 It is an enlarged schematic diagram of the bottom surface of the light output in the embodiment of the present application.

[0043] Figure 4 It is a schematic top view of the overall structure in the embodiment of the present application.

[0044] Figure 5 It is a bottom view schematic diagram of the overall structure in the embodiment of the present application.

[0045] Figure 6 It is a flow chart of the convex lens design method in the embodiment of the present application.

[0046] Description of reference numerals:

[0047] 1. Mirror body; 2. Light entrance portion; 21. Light entrance hole; 22. Light entrance top surface; 23. Light entrance 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

[0048] The following is combined with Figure 1-6 This application is described in further detail.

[0049] The embodiments of the present application disclose an optical structure of a TIR lens for mixing light and color at small and medium angles.

[0050] Reference Figure 1 、 2 3. The optical structure of a small to medium angle light mixing and color mixing TIR lens includes a lens body 1, which includes a light input portion 2 and a light output portion 3. 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.

[0051] The middle portion of the light entrance portion 2 away from the light exit portion 3 is recessed inward to form a light entrance hole 21. The light entrance hole 21 does not pass through the light entrance portion 2. The top of the light entrance hole 21 protrudes toward the bottom of the light entrance hole 21 to form a light entrance top surface 22 for refracting light. A light entrance side wall 23 is provided around the inner periphery of the light entrance hole 21 for refracting light. A total reflection side wall 24 is provided around the inner periphery of the light entrance portion 2 for receiving and refracting light refracted by the light entrance side wall 23.

[0052] The middle portion of the light emitting portion 3, which is 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. A light emitting side wall 33 is provided around the inner periphery of the light emitting hole 31. A horizontal light emitting surface 34 is provided 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.

[0053] The light incident hole 21 receives external light, and the total reflection spot in the light passes through the light incident side wall 23 and is projected onto the total reflection side wall 24 to be refracted into a plurality of light rays, which are then refracted out from the horizontal light emitting surface 34 .

[0054] In the actual refraction process, the light spot of the total reflection 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 part 3 to reflect the light as cross light. All light passes through the horizontal light output surface 34 and refracts, and converges at a specific distance at a point, thereby realizing the total reflection spot color mixing.

[0055] Reference Figure 1 、 2 3. Specifically, in this 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, and the first arc-shaped portion and the second arc-shaped portion are adjacent to each other. The first arc-shaped portion includes a first arc-shaped surface 321 and a second arc-shaped surface 322, and 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 concave inward 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 the same as 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 horizontal diameter D3 of the third curved surface 323, 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 number of light rays through the light-entering top surface 22, and the several refracted light rays are respectively refracted from the edge and center of the annular curved surface with convex edges and concave middle of the light-emitting bottom surface 32, and refracted into two opposite directions of light rays.

[0056] 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. All the light rays converge at a point at a specific distance, thereby realizing the color mixing of the refracted light spot.

[0057] The present invention differs from conventional TIR lenses primarily in that the light-emitting bottom surface 32 in the center of the lens is designed as an annular convex lens instead of a single flat lens, convex lens, or concave lens. In a cross-section, the diameter of the light-emitting bottom surface 32 can be divided into four sections: a first curved surface 321, a second curved surface 322, a third curved surface 323, and a fourth curved surface 324. These four sections, from left to right, resemble a convex lens, a concave lens, a concave lens, and a convex lens. Their thickness changes from left to right in the following order: thin-thick-thin-thick-thin.

[0058] After being collimated by the light-entering top surface 22 of the mirror body 1, the light can be divided into two parts by the light-emitting bottom surface 32. One part of the light is converged, and the other part is dispersed, resulting in a converged light spot and a dispersed light spot respectively. 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 made consistent. When the two are superimposed, the refracted light spot can be mixed and color-mixed uniformly. Since the light-emitting bottom surface 32 is divided into four sections, the structures corresponding to the two edge sections can be equivalent to convex lenses, which can converge light toward the center and prevent 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 a decrease in 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 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.

[0059] 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 more symmetrical and concentrated, reducing the loss of light energy, thereby improving the light efficiency.

[0060] Reference Figure 1 、 45. Specifically, in this embodiment, light entrance aperture 21 is truncated cone-shaped, gradually shrinking from large to small, toward light exit aperture 31, while light exit aperture 31 is truncated cone-shaped, gradually shrinking from large to small, toward light entrance aperture 21. Both truncated cone-shaped designs enhance the focusing capability of light entering through light entrance aperture 21, optimize the light propagation path, reduce light energy loss, improve light efficiency, and achieve higher light utilization.

[0061] Reference Figure 1 、 4 5. Specifically, in this embodiment, the light output portion 3 is cylindrical, and 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.

[0062] During the actual lighting process, light enters from the light entrance hole 21 and diverges into several light rays after refraction. Since the cross-sectional length of the light emitting portion 3 is 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 emitting portion 3 can receive and refract more light, thereby avoiding a reduction in the efficiency of light utilization.

[0063] Reference Figure 1 、 4 Specifically, in this embodiment, the light entrance portion 2 is truncated in a cone shape that gradually expands from small to large toward the light exit portion 3, and both sides of the cross section of the light entrance portion 2 are arc-shaped. This optimizes the light propagation path, reduces light energy loss, improves light efficiency, and increases light utilization.

[0064] 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, gradually transitioning to the top of the light output part 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 and the total reflection light spot can achieve uniform light mixing and color mixing.

[0065] The embodiments of the present application also disclose a design method for a small to medium angle light-mixing and color-mixing TIR lens.

[0066] Reference Figure 1 、 6 A design method for a small to medium angle light-mixing and color-mixing TIR lens includes:

[0067] S1: Determine the lighting target, light source, and lens size characteristics, and design the optical path of the lens light entrance hole 21 according to the requirements;

[0068] S2: Light path design of the total reflection optical surface: Design the light path design of the cross light to form the light spot and the light path design of the non-cross light to form the light spot respectively, so as to realize the light mixing pattern structure design of the light emitting surface of the total reflection light;

[0069] S3: Design of the light-mixing pattern structure of the light-emitting surface of the annular convex lens: Design the optical path design of the converging light spot and the optical path design of the dispersed light spot respectively, so as to realize the design of the light-mixing pattern structure of the light-emitting surface of the annular convex lens;

[0070] S4: Complete the optical design of the light-transmitting mirror based on the light-emitting surface mixed pattern structure design of the total reflected light and the light-emitting surface mixed pattern structure design of the annular convex lens;

[0071] S5: After the optical design of the light-transmitting mirror is completed, the lens mold structure design and lens injection molding are carried out;

[0072] S6: Finally, perform lens optical verification to ensure product quality.

[0073] The examples of this specific embodiment are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, any equivalent changes made based on the structure, shape, and principle of this application should be included in the scope of protection of this application.

Claims

1. An optical structure of a small to medium angle light and color mixing TIR lens, characterized by: The mirror body (1) comprises a light entrance portion (2) and a light exit portion (3), wherein the light exit portion (3) is arranged on one side of the light entrance portion (2); The light entrance portion (2) is recessed inwardly away from the light exit portion (3) to form a light entrance hole (21); a top portion of the light entrance hole (21) is provided with a light entrance top surface (22) protruding toward the bottom portion of the light entrance hole (21); a light entrance side wall (23) is provided around the inner periphery of the light entrance hole (21); and a total reflection side wall (24) is provided around the inner periphery of the light entrance portion (2); 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 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); a light emitting side wall (33) is provided around the inner periphery of the light emitting hole (31); and the light emitting portion (3) is provided with a horizontal light emitting surface (34) on a side away from the light incident portion (2); 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 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 with a convex edge and a concave middle of the light exit bottom surface (32) to form two light rays in opposite directions.

2. The optical structure of the small to medium angle light 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 arc curvature of the first curved surface (321) is smaller than the arc curvature of the second curved surface (322), so that the thickness of the light-emitting bottom surface (32) from the first curved surface (321) to the fourth curved surface (324) forms a thin-thick-thin-thick-thin structure.

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

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

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

7. The optical structure of the medium and small angle light and color mixing TIR lens according to claim 6, characterized in that: The light-emitting portion (3) is cylindrical, and is arranged on a side of the light-entering portion (2) away from the light-entering 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 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 and color mixing TIR lens according to claim 1, characterized in that: The light input portion (2) and the light output portion (3) are an integrally formed structure.

10. A design method for a small- to medium-angle light-mixing and color-mixing TIR lens, based on the optical structure of any one of claims 1 to 9, characterized in that: S1: Determine the lighting target, the light source, and the lens size characteristics, and design the light path of the lens light entrance hole (21) according to the requirements; S2: Light path design of the total reflection optical surface: Design the light path design of the cross light to form the light spot and the light path design of the non-cross light to form the light spot respectively, so as to realize the light mixing pattern structure design of the light emitting surface of the total reflection light; S3: Design of the light-mixing pattern structure of the light-emitting surface of the annular convex lens: Design the optical path design of the converging light spot and the optical path design of the dispersed light spot respectively, so as to realize the design of the light-mixing pattern structure of the light-emitting surface of the annular convex lens; S4: Complete the optical design of the light-transmitting mirror based on the light-emitting surface mixed pattern structure design of the total reflected light and the light-emitting surface mixed 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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