Linear polarized illumination optical structure of TIR lens

Abstract

The utility model discloses a TIR lens linear polarized lighting optical structure which comprises an optical main body, a mounting platform is arranged at the top of the optical main body, a plane light emitting surface is arranged on the top surface of the mounting platform, a plurality of TIR lenses are arranged at the bottom of the optical main body, a light inlet hole is formed in the bottom of the inner side of each TIR lens, and a light outlet hole is formed in the bottom of the inner side of each TIR lens. The cross section of the TIR lens is arranged in a trapezoid shape, the back face of the TIR lens is arranged in a meniscus shape which is convex outwards and concave in the middle, the top of the light inlet hole is provided with a light inlet hole top light inlet face, the light inlet hole top light inlet face is arranged in a wave shape which is convex in the middle and concave on the two sides, and ice crystal patterns are arranged on the surface of the plane light outlet face. The utility model has the advantages of simple structure, cost saving, light spot residual light reduction, light utilization rate improvement, fishtail-shaped residual light elimination, light spot backlight side variable cut-off, more uniform light spot transition, realization of uniform light and color mixing in a polarized light illumination area while ensuring high utilization rate of light, and simplification of the lamp structure.

Description

Technical Field

[0001] This utility model relates to the field of lighting technology, specifically to a TIR lens linear polarized lighting optical structure. Background Technology

[0002] For all industries, ensuring product quality while reducing costs is a constant goal, and the lighting industry is no exception. Furthermore, with the promotion of smart lighting, color temperature adjustment is gradually becoming an essential function for luminaires. In the lighting field, because luminaires are installed off-center from the illuminated area, polarizing optical components are needed to fully illuminate the entire area. Commonly used polarizing optical components on the market include polarizing plastic cups, stretched polarizing reflectors, flat extruded lenses, and convex streetlight lenses.

[0003] Due to structural limitations, polarizing plastic cups exhibit direct light spots. This restricts the design of the polarization angle, limiting their applicability in various applications. Furthermore, it can cause the light spot to layer, resulting in uneven illuminance across the entire lighting area. Additionally, polarizing plastic cups typically require the use of transparent glass, further impacting optical performance and increasing the cost of the lighting fixture.

[0004] Due to the special installation position of the light source, the luminaire structure of the stretch polarized reflector is complex and the light waste is serious, so it is rarely used.

[0005] The optical effect of a convex light-emitting lens for streetlights can meet the lighting requirements, but because its light-emitting surface is not flat, it has an unpleasant appearance and is prone to dust accumulation. Therefore, transparent glass or dustproof sheets are generally required to be added to the lamp. This makes the lamp structure more complex and increases the cost. On the other hand, the reflection at the interface of the transparent glass can easily distort the original optical effect of the lens and reduce its efficiency.

[0006] For extruded lenses with planar light-emitting surfaces, their structure is simple, which makes the lamp structure simple and the cost low; however, due to the structural limitations of extruded lenses, they can only control the optics of the polarization direction, and the shape and effect of the light spot are limited, and the entire lighting area is prone to uneven illumination and other defects.

[0007] In general, luminaires using various polarizing optical components either have simple structures and low costs but poor optical performance; or complex structures and high costs with poor optical performance; or excellent optical performance but complex structures and high costs. Furthermore, all current polarizing optical components suffer from poor color mixing due to their design complexity, resulting in significant color differences in the light spot and making them unsuitable for intelligent lighting with adjustable color temperature. Therefore, to avoid the shortcomings of existing technologies, it is necessary to improve them. Utility Model Content

[0008] The purpose of this invention is to overcome the shortcomings and deficiencies in the prior art and provide a TIR lens linear polarized illumination optical structure with simple structure and uniform light mixing and color mixing.

[0009] This utility model is achieved through the following technical solution:

[0010] A TIR lens linear polarized illumination optical structure includes an optical body, a mounting platform on the top of the optical body, a planar light-emitting surface on the top surface of the mounting platform, a plurality of TIR lenses on the bottom of the optical body, an entrance aperture on the bottom inner side of each TIR lens, a trapezoidal cross-section of each TIR lens, a crescent-shaped back surface that is convex on the outside and concave in the middle, a top light-entry surface on the top of the entrance aperture that is wavy with a convex center and concave sides, and an ice crystal pattern on the surface of the planar light-emitting surface.

[0011] Furthermore, the front of the light entrance aperture is provided with a light entrance aperture front sidewall light entrance surface, and the front of the TIR lens is provided with a lens front TIR reflective optical surface.

[0012] Furthermore, the rear part of the light entrance aperture is provided with a light entrance aperture back sidewall light entrance surface, and the rear side of the TIR lens is provided with a lens back TIR reflective optical surface.

[0013] Furthermore, the light entrance aperture has light entrance sidewalls on both the left and right sides, and the light entrance sidewalls on the left and right sides are symmetrically arranged. The TIR lens has TIR reflective optical surfaces on both the left and right sides, and the TIR reflective optical surfaces on the left and right sides are symmetrically arranged.

[0014] Furthermore, the bottom of the installation platform is provided with a flat bottom surface.

[0015] Furthermore, the bottom of the installation platform is provided with installation clips.

[0016] Furthermore, the bottom of the installation platform is provided with installation positioning posts.

[0017] Compared to existing technologies, this invention features several TIR lenses at the bottom of the optical body, with a light entrance hole on the inner bottom of each TIR lens. The cross-sectional shape of the TIR lens is trapezoidal, and the back of the TIR lens is a crescent shape with an outward convex and a concave center. The top of the light entrance hole has a light-entry surface with a wavy shape that is convex in the middle and concave on both sides. The surface of the planar light-emitting surface is decorated with ice crystal patterns. This design ensures high light utilization while achieving uniform light mixing and color mixing in the polarized illumination area, and simplifies the lamp structure, offering the following advantages:

[0018] 1. The light-emitting surface of the overall lens is flat, and it contains multiple lenses, each of which is a TIR lens. All light rays are precisely controlled through the total reflection surface, improving the overall efficiency of the lens. In addition, the overall lens with this structure can be directly used as the appearance of the lamp, making the lamp structure simpler and saving costs.

[0019] 2. The cross-sectional shape of a single lens is trapezoidal, which can precisely control the shape of the light spot, reduce the residual light of the light spot, improve the light utilization rate, and is more suitable for application in rectangular lighting areas.

[0020] 3. The TIR surface on the back of a single lens is a crescent shape with a convex outer edge and a concave inner edge. Because the TIR surface on the back of a conventional lens is almost a straight line laterally, it has almost no light control capability. The resulting light spot will have a fishtail-like residual light at the back edge, making the light spot not cut off enough on the side closest to the lamp. The lens uses a crescent-shaped structure to increase the light control capability in this direction, eliminate the fishtail-like residual light, and make the back side of the light spot cut off.

[0021] 4. The top light-receiving surface of the light-receiving aperture is a wavy freeform surface with a convex center and concave sides. When using two patch light sources with different color temperatures simultaneously, the overall area of ​​the light source increases, and the light-receiving surface is close to the light source, resulting in weak light control. Conventional freeform surfaces refract light into a bright center with poor color mixing, leading to uneven illuminance and noticeable color differences in the illuminated area. Therefore, a wavy freeform surface is used. The concept is that the light-receiving surface of each light source perpendicular to its corresponding area is a concave surface, with multiple concave surfaces connected to form a wavy structure. This results in a more uniform light spot transition and more even illuminance in the illuminated area. Furthermore, because each light source has a different angle of incidence relative to the multiple concave light-receiving surfaces, the light spot formation is more complex, resulting in better color mixing and better adapting to the development trend of intelligent lighting.

[0022] 5. The planar light-emitting surface adopts an ice crystal pattern for light mixing. Due to the complex composition of the light spot of the polarized TIR lens, conventional hexagonal, rhomboid, Fibonacci patterns cannot meet the requirements of uniform light mixing. To make the effect better after the light spots are superimposed, an ice crystal pattern is used. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the first direction structure of the TIR lens linear polarization illumination optical structure of this utility model;

[0025] Figure 2This is a schematic diagram of the second direction structure of the TIR lens linear polarization illumination optical structure of this utility model;

[0026] Figure 3 This is a schematic diagram of the first direction structure of the TIR lens of this utility model;

[0027] Figure 4 This is a schematic diagram of the second direction structure of the TIR lens of this utility model;

[0028] Figure 5 This is a schematic diagram of the cross-sectional structure of the TIR lens of this utility model along the front-back direction;

[0029] Figure 6 This is a schematic diagram of the cross-sectional structure of the TIR lens of this utility model along the left-right direction;

[0030] Figure 7 This is a flowchart illustrating the design method of the linear polarized illumination optical structure of the TIR lens of this utility model.

[0031] In the diagram: 1-Mounting platform; 2-Flat light-emitting surface; 3-TIR lens; 4-Light entrance aperture; 5-Top light entrance surface of the light entrance aperture; 6-Ice crystal pattern; 7-Front side wall light entrance surface of the light entrance aperture; 8-Front TIR reflective optical surface of the lens; 9-Back side wall light entrance surface of the light entrance aperture; 10-Back TIR reflective optical surface of the lens; 11-Side side wall light entrance surface of the light entrance aperture; 12-Side TIR reflective optical surface of the lens; 13-Flat bottom surface; 14-Mounting clip; 15-Mounting positioning post. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0033] like Figures 1 to 6 The present invention discloses a TIR lens linear polarized illumination optical structure, including an optical body, a mounting platform 1 on the top of the optical body, a planar light-emitting surface 2 on the top surface of the mounting platform 1, a plurality of TIR lenses 3 on the bottom of the optical body, a light-entry hole 4 on the bottom inner side of the TIR lens 3, the cross-sectional shape of the TIR lens 3 is trapezoidal, the back of the TIR lens 3 is crescent-shaped with outward convexity and concave center, the top of the light-entry hole 4 is a light-entry hole top light-entry surface 5, the light-entry hole top light-entry surface 5 is wavy with a convex center and concave sides, and the surface of the planar light-emitting surface 2 is provided with ice crystal pattern 6.

[0034] The light entrance aperture 4 has a front sidewall light entrance surface 7 at its front, the TIR lens 3 has a front TIR reflective optical surface 8 at its front, the light entrance aperture 4 has a back sidewall light entrance surface 9 at its rear, the TIR lens 3 has a back TIR reflective optical surface 10 at its rear, the light entrance aperture 4 has side wall light entrance surfaces 11 on both the left and right sides, and the side wall light entrance surfaces 11 on both the left and right sides are symmetrically arranged. The TIR lens 3 has side TIR reflective optical surfaces 12 on both the left and right sides, and the side TIR reflective optical surfaces 12 on both the left and right sides are symmetrically arranged.

[0035] The light path is composed of the following components: the front side wall light-incident surface 7 of the light-incident aperture, the front TIR reflective optical surface 8 of the lens, the back side wall light-incident surface 9 of the light-incident aperture, the back TIR reflective optical surface 10 of the lens, the side side wall light-incident surface 11 of the light-incident aperture, and the side TIR reflective optical surface 12 of the lens. The light path is divided into two types: polarized light and perpendicular polarized light. Both directions contain both refracted and totally reflected light. Therefore, the overall light spot is formed by the superposition of refracted light spot and totally reflected light spot.

[0036] The optical path diagram for polarization consists of three parts: The first part of the light is refracted by the light-receiving surface 5 at the top of the light-receiving aperture to the light-exiting surface 2 of the ice crystal pattern, and then directly refracted out. The direction of this part of the outgoing light is consistent, forming the main part of the polarized light spot. The second part of the light is refracted by the light-receiving surface 7 on the front sidewall of the light-receiving aperture to the TIR reflecting optical surface 8 on the front of the lens, and then totally reflected back to the light-exiting surface 2 of the ice crystal pattern before being directly refracted out. The direction of this part of the outgoing light is consistent with the direction of the incident light. The third part of the light is refracted by the light-receiving surface 5 on the back sidewall of the light-receiving aperture to the TIR reflecting optical surface 8 on the back of the lens, and then totally reflected back to the light-exiting surface 2 of the ice crystal pattern before being directly refracted out. The direction of this part of the outgoing light is opposite to the direction of the incident light. The directions of the three parts of the outgoing light are ultimately consistent, superimposed to form the polarized light spot.

[0037] The optical path diagram in the vertical polarization direction consists of two parts: the first part of the light is refracted by the light-incident surface 5 at the top of the light-incident aperture to the light-out surface 2 of the ice crystal pattern and then directly refracted out. Since the light-incident surface in this direction is a wave-shaped freeform surface structure and a dual-color temperature light source is used, the light spot is equivalent to the superposition of two concave lens refracted light spots; the second part of the light is refracted by the light-incident surface 11 on the side wall of the light-incident aperture to the TIR reflective optical surface 12 on the side of the lens, and then totally reflected to the light-out surface 2 of the ice crystal pattern and then directly refracted out.

[0038] The bottom of the mounting platform 1 is provided with a flat bottom surface 13, which facilitates stable contact between the optical body and the lamp and improves the tightness of the installation.

[0039] The bottom of the mounting platform 1 is equipped with mounting clips 14, which facilitates quick and secure installation of the optical body.

[0040] The bottom of the mounting platform 1 is equipped with mounting positioning posts 15, which facilitates quick positioning and installation of the optical body and ensures stable installation.

[0041] like Figure 7 The present invention discloses a design method for a TIR lens linear polarized illumination optical structure, comprising the following steps:

[0042] Step (1): Determine the lighting target;

[0043] Step (2): Determine the light source information;

[0044] Step (3): Determine the lens design direction and contour features;

[0045] Step (4): Design of the optical path in the polarization direction and the optical path in the perpendicular polarization direction;

[0046] Step (5): Design of the light-mixing pattern structure on the planar light-emitting surface;

[0047] Step (6): Lens mold structure design;

[0048] Step (7): Lens mold making;

[0049] Step (8): Lens injection molding;

[0050] Step (9): Lens optical verification.

[0051] The optical path design in step (4) for the polarization direction includes the design of the front TIR reflective optical surface in the polarization direction, the design of the top optical surface of the entrance aperture in the polarization direction, and the design of the back TIR reflective optical surface in the polarization direction.

[0052] The optical path design in step (4) in the vertical polarization direction includes the design of the top optical surface of the entrance aperture in the vertical polarization direction and the design of two symmetrical TIR reflection optical surfaces in the vertical polarization direction.

[0053] This utility model features a plurality of TIR lenses 3 at the bottom of the optical body, with a light entrance hole 4 at the bottom inner side of each TIR lens 3. The cross-sectional shape of the TIR lens 3 is trapezoidal, and the back of the TIR lens 3 is a crescent shape with an outward convex and a concave center. The top of the light entrance hole 4 has a light entrance surface 5, which is wavy with a convex center and concave sides. The surface of the planar light-emitting surface 2 is decorated with ice crystal patterns 6. This design ensures high light utilization while achieving uniform light mixing and color mixing in the polarized illumination area, and simplifies the lamp structure, thus providing the following beneficial effects:

[0054] 1. The light-emitting surface of the overall lens is flat, and it contains multiple lenses, each of which is a TIR lens. All light rays are precisely controlled through the total reflection surface, improving the overall efficiency of the lens. In addition, the overall lens with this structure can be directly used as the appearance of the lamp, making the lamp structure simpler and saving costs.

[0055] 2. The cross-sectional shape of a single lens is trapezoidal, which can precisely control the shape of the light spot, reduce the residual light of the light spot, improve the light utilization rate, and is more suitable for application in rectangular lighting areas.

[0056] 3. The TIR surface on the back of a single lens is a crescent shape with a convex outer edge and a concave inner edge. Because the TIR surface on the back of a conventional lens is almost a straight line laterally, it has almost no light control capability. The resulting light spot will have a fishtail-like residual light at the back edge, making the light spot not cut off enough on the side closest to the lamp. The lens uses a crescent-shaped structure to increase the light control capability in this direction, eliminate the fishtail-like residual light, and make the back side of the light spot cut off.

[0057] 4. The top light-receiving surface of the light-receiving aperture is a wavy freeform surface with a convex center and concave sides. When using two patch light sources with different color temperatures simultaneously, the overall area of ​​the light source increases, and the light-receiving surface is close to the light source, resulting in weak light control. Conventional freeform surfaces refract light into a bright center with poor color mixing, leading to uneven illuminance and noticeable color differences in the illuminated area. Therefore, a wavy freeform surface is used. The concept is that the light-receiving surface of each light source perpendicular to its corresponding area is a concave surface, with multiple concave surfaces connected to form a wavy structure. This results in a more uniform light spot transition and more even illuminance in the illuminated area. Furthermore, because each light source has a different angle of incidence relative to the multiple concave light-receiving surfaces, the light spot formation is more complex, resulting in better color mixing and better adapting to the development trend of intelligent lighting.

[0058] 5. The planar light-emitting surface adopts an ice crystal pattern for light mixing. Due to the complex composition of the light spot of the polarized TIR lens, conventional hexagonal, rhomboid, Fibonacci patterns cannot meet the requirements of uniform light mixing. To make the effect better after the light spots are superimposed, an ice crystal pattern is used.

[0059] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A TIR lens linear polarized illumination optical structure, characterized in that: The optical body includes an optical main body with a mounting platform on its top. The top surface of the mounting platform has a planar light-emitting surface. The bottom of the optical main body has several TIR lenses. The bottom inner side of each TIR lens has a light-entry hole. The cross-sectional shape of each TIR lens is trapezoidal. The back surface of each TIR lens is crescent-shaped with an outward convexity and a concave center. The top of the light-entry hole has a light-entry top surface. The light-entry top surface of the light-entry hole has a wavy shape with a convex center and concave sides. The surface of the planar light-emitting surface has an ice crystal pattern.

2. The TIR lens linear polarized illumination optical structure according to claim 1, characterized in that: The front of the light entrance aperture is provided with a light entrance aperture front sidewall light entrance surface, and the front of the TIR lens is provided with a lens front TIR reflective optical surface.

3. The TIR lens linear polarized illumination optical structure according to claim 1, characterized in that: The rear part of the light entrance aperture is provided with a light entrance aperture back sidewall light entrance surface, and the rear side of the TIR lens is provided with a lens back TIR reflective optical surface.

4. The TIR lens linear polarized illumination optical structure according to claim 1, characterized in that: The light entrance aperture has light entrance sidewalls on both the left and right sides, and the light entrance sidewalls on the left and right sides are symmetrically arranged. The TIR lens has TIR reflective optical surfaces on both the left and right sides, and the TIR reflective optical surfaces on the left and right sides are symmetrically arranged.

5. The TIR lens linear polarized illumination optical structure according to claim 1, characterized in that: The bottom of the installation platform has a flat bottom surface.

6. The TIR lens linear polarized illumination optical structure according to claim 1, characterized in that: The bottom of the installation platform is equipped with installation clips.

7. The TIR lens linear polarized illumination optical structure according to claim 1, characterized in that: The bottom of the installation platform is equipped with installation positioning columns.

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