Linear polarized illumination optical structure of TIR lens and design method of linear polarized illumination optical structure

Abstract

The invention discloses a TIR lens linear polarized illumination optical structure which comprises an optical main body, a mounting platform is arranged at the top of the optical main body, a planar 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. According to the invention, the structure is simple, the cost is saved, the light spot residual light is reduced, the light utilization rate is improved, the fishtail-shaped residual light is eliminated, the light spot backlight side is cut off, the light spot transition is more uniform, the high light utilization rate is ensured, the uniform light and color mixing of a polarized light illumination area is realized, and the lamp structure is simplified.

Description

Technical Field

[0001] The invention relates to the technical field of lighting, and in particular to a TIR lens linear polarized lighting optical structure and a design method thereof. Background Art

[0002] For all industries, both ensuring product quality and reducing costs are the goals that all products have always pursued, and this is also true for the lighting industry. In addition, with the promotion of intelligent lighting, color temperature adjustment has gradually become a required function of lamps. In the field of lighting, since the installation position of the lamp is biased towards one side of the lighting area, polarized optical components are required to fully illuminate the entire lighting area. Currently, the commonly used polarized optical components on the market mainly include polarized plastic cups, stretched polarized reflectors, flat light-emitting surface extruded lenses, convex light-emitting surface street lamp lenses, etc.

[0003] For polarized plastic cups, due to structural limitations, there is a direct light spot, which will limit the polarization angle design and poor applicability in application occasions. On the other hand, it is easy to cause the light spot to be layered, and the illumination of the entire lighting area is uneven. In addition, polarized plastic cups usually need to be used with transparent glass, which further affects the optical effect and increases the cost of the lamp.

[0004] Due to the particularity of the light source installation position, the stretched polarized reflector has a complex lamp structure and serious light waste, and is rarely used.

[0005] The optical effect of the street lamp lens with a convex light-emitting surface can meet the lighting requirements, but because its light-emitting surface is non-planar, the appearance is not good and dust is easily accumulated, so transparent glass or dust-proof sheets are generally required to be added to the lamp. On the one hand, this makes the lamp structure complicated and increases the cost. On the other hand, the interface reflection of the transparent glass can easily distort the original optical effect of the lens and reduce efficiency.

[0006] The flat light-emitting surface extrusion lens has a simple structure, which makes the lamp structure simple and low-cost; however, due to the structural limitations of the extrusion lens, only the optics in the polarization direction can be controlled, the spot shape and effect are limited, and the entire lighting area is prone to uneven illumination and other undesirable conditions.

[0007] In general, the lamps corresponding to various polarized optical components are either simple in structure and low in cost but poor in optical effect; or complex in structure and high in cost but poor in optical effect; or good in optical effect but complex in structure and high in cost. In addition, all existing polarized optical components are difficult to design, have poor color mixing effect, and have serious color difference in light spot, and are not applicable to intelligent lighting with adjustable color temperature. Therefore, in order to avoid the shortcomings of the existing technology, it is necessary to improve the existing technology. Summary of the invention

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

[0009] Another object of the present invention is to provide a design method for a TIR lens linear polarized light illumination optical structure.

[0010] The present invention is achieved through the following technical solutions:

[0011] A TIR lens linear polarized lighting optical structure comprises an optical body, a mounting platform is provided on the top of the optical body, a planar light emitting surface is provided on the top surface of the mounting platform, a plurality of TIR lenses are provided on the bottom of the optical body, a light entrance hole is provided on the bottom inner side of the TIR lens, the cross-sectional shape of the TIR lens is trapezoidal, the back surface of the TIR lens is in a crescent shape with a convex outer side and a concave middle side, a light entrance hole top light entrance surface is provided on the top of the light entrance hole, the light entrance hole top light entrance surface is in a wavy shape with a convex middle side and concave sides, and an ice crystal pattern is provided on the surface of the planar light emitting surface.

[0012] Furthermore, a light incident surface is disposed on the front side wall of the light incident hole, and a lens front TIR reflecting optical surface is disposed on the front side of the TIR lens.

[0013] Furthermore, a light incident surface is provided at the rear of the light incident hole and a TIR reflective optical surface is provided at the rear of the TIR lens.

[0014] Furthermore, the left and right sides of the light entrance hole are provided with side wall light entrance surfaces, and the side wall light entrance surfaces of the light entrance hole on the left and right sides are symmetrically arranged. The left and right sides of the TIR lens are provided with side TIR reflective optical surfaces of the lens, and the side TIR reflective optical surfaces of the lens on the left and right sides are symmetrically arranged.

[0015] Furthermore, a flat bottom surface is provided at the bottom of the installation platform.

[0016] Furthermore, a mounting buckle is provided at the bottom of the mounting platform.

[0017] Furthermore, a mounting positioning column is provided at the bottom of the mounting platform.

[0018] A design method for a TIR lens linear polarized illumination optical structure comprises the following steps:

[0019] Step (1): determine the lighting target;

[0020] Step (2): Determine light source information;

[0021] Step (3): Determine the lens design direction and profile features;

[0022] Step (4): optical path design in the polarization direction and optical path design in the perpendicular polarization direction;

[0023] Step (5): Design of mixed light pattern structure on the plane light emitting surface;

[0024] Step (6): lens mold structure design;

[0025] Step (7): making a lens mold;

[0026] Step (8): lens injection molding;

[0027] Step (9): Lens optical verification.

[0028] Furthermore, the optical path design in the polarization direction of step (4) includes a front TIR reflection optical surface design in the polarization direction, a top optical surface design of the light entrance hole in the polarization direction, and a back TIR reflection optical surface design in the polarization direction.

[0029] Furthermore, the optical path design in the vertical polarization direction of step (4) includes a top optical surface design of the light entrance hole in the vertical polarization direction and a two-symmetric TIR reflection optical surface design in the vertical polarization direction.

[0030] Compared with the prior art, the present invention is provided with a plurality of TIR lenses at the bottom of the optical body, a light entrance hole is provided at the bottom of the inner side of the TIR lens, the cross-sectional shape of the TIR lens is set in a trapezoidal shape, the back of the TIR lens is set in a meniscus shape with a convex outer side and a concave middle side, the top of the light entrance hole is provided with a light entrance surface at the top of the light entrance hole, the light entrance surface at the top of the light entrance hole is set in a wave shape with a convex middle side and concave sides, and the surface of the plane light exit surface is provided with an ice crystal pattern, so that high utilization rate of light is ensured while achieving uniform light mixing and color mixing in the polarized lighting area, and simplifying the structure of the lamp, and having the following beneficial effects:

[0031] 1. The light-emitting surface of the overall lens is a plane, and it contains multiple lenses inside. Each lens is a TIR lens. All light is precisely controlled through the total reflection surface to improve the overall efficiency of the lens. In addition, the overall lens of this structure can be directly used as the appearance of the lamp, making the lamp structure simpler and saving costs.

[0032] 2. The cross-section of a single lens is a trapezoid, which can accurately control the shape of the light spot, reduce the residual light of the light spot, and improve the utilization rate of light. It is more suitable for use in rectangular and other lighting areas.

[0033] 3. The TIR surface on the back of a single lens is a convex crescent shape with a concave center. Because the TIR surface on the back of a conventional lens is close to a straight line horizontally and has almost no light control ability, there will be fishtail-shaped residual light on the back edge of the formed light spot, which makes the light spot on the side of the lamp not cut off enough. The lens uses a meniscus structure to increase the light control ability in this direction, eliminate the fishtail-shaped residual light, and make the light spot on the backlight side cut off.

[0034] 4. The top light-entering surface of the light-entering hole is a wavy free-form surface that is convex in the middle and concave on both sides. When two patch light sources with different color temperatures are used at the same time, the overall area of ​​the light source becomes larger, and the light-entering surface is close to the light source, and its light control ability is weak. The center of the light spot refracted by the conventional free-form surface will be very bright and the color mixing effect will be poor, which will make the illumination of the lighting area uneven and have obvious color difference. Therefore, the use of a wavy free-form surface is based on the idea that the light-entering surface of each light source in the vertical corresponding area is a concave surface, and multiple concave surfaces are connected to form a wavy structure, so that the light spot transition is more uniform and the illumination of the lighting area is uniform. In addition, since the incident angles of each light source relative to the multiple concave light-entering surfaces are different, the light spot formation is more complex, the color mixing effect is better, and it is more in line with the development trend of intelligent lighting.

[0035] 5. The flat light-emitting surface adopts ice crystal pattern for light mixing. Due to the complex light spot composition of the polarized TIR lens, conventional hexagonal, diamond, Fibonacci and other patterns cannot meet the requirements of uniform light mixing. In order to make the effect better after the light spot is superimposed, the ice crystal pattern is used. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0037] Figure 1 It is a schematic diagram of the first direction structure of the linear polarized light illumination optical structure of the TIR lens of the present invention;

[0038] Figure 2 It is a schematic diagram of the second direction structure of the TIR lens linear polarized illumination optical structure of the present invention;

[0039] Figure 3 It is a schematic diagram of the structure of the TIR lens in the first direction of the present invention;

[0040] Figure 4 It is a schematic diagram of the structure of the TIR lens in the second direction of the present invention;

[0041] Figure 5 Schematic diagram of the cross-sectional structure of the TIR lens of the present invention along the front-to-back direction;

[0042] Figure 6 Schematic diagram of the cross-sectional structure of the TIR lens of the present invention along the left and right directions;

[0043] Figure 7 It is a schematic flow chart of the design method of the TIR lens linear polarized illumination optical structure of the present invention.

[0044] In the figure: 1-installation platform; 2-planar light output surface; 3-TIR lens; 4-light input hole; 5-light input surface on the top of the light input hole; 6-ice crystal pattern; 7-light input surface on the front side wall of the light input hole; 8-TIR reflective optical surface on the front side of the lens; 9-light input surface on the back side wall of the light input hole; 10-TIR reflective optical surface on the back side of the lens; 11-light input surface on the side wall of the light input hole; 12-TIR reflective optical surface on the side of the lens; 13-planar bottom surface; 14-installation buckle; 15-installation positioning column. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0046] like Figures 1 to 6 The present invention is shown as a TIR lens linear polarized lighting optical structure, comprising an optical body, a mounting platform 1 is provided on the top of the optical body, a planar light emitting surface 2 is provided on the top surface of the mounting platform 1, a plurality of TIR lenses 3 are provided on the bottom of the optical body, a light entrance hole 4 is provided on the bottom of the inner side of the TIR lens 3, the cross-sectional shape of the TIR lens 3 is trapezoidal, the back surface of the TIR lens 3 is in a crescent shape with a convex outer side and a concave middle side, a light entrance hole top light entrance surface 5 is provided on the top of the light entrance hole 4, the light entrance hole top light entrance surface 5 is in a wavy shape with a convex middle side and concave sides, and an ice crystal pattern 6 is provided on the surface of the planar light emitting surface 2.

[0047] A front side wall light entrance surface 7 is provided at the front of the light entrance hole 4, a front TIR reflective optical surface 8 is provided at the front side of the TIR lens 3, a back side wall light entrance surface 9 is provided at the rear of the light entrance hole 4, a back TIR reflective optical surface 10 is provided at the rear side of the TIR lens 3, side wall light entrance surfaces 11 are provided on the left and right sides of the light entrance hole 4, and the side wall light entrance surfaces 11 on the left and right sides are symmetrically arranged, and lens side TIR reflective optical surfaces 12 are provided on the left and right sides of the TIR lens 3, and the side TIR reflective optical surfaces 12 on the left and right sides are symmetrically arranged.

[0048] Through the combination of the above light incident surface 7 on the front side wall of the light incident hole, the TIR reflecting optical surface 8 on the front side of the lens, the light incident surface 9 on the back side wall of the light incident hole, the TIR reflecting optical surface 10 on the back side of the lens, the light incident surface 11 on the side wall of the light incident hole and the TIR reflecting optical surface 12 on the side of the lens, the incident and outgoing light paths of the light are divided into two directions: the polarization direction and the vertical polarization direction. Both directions include refraction and total reflection light at the same time, so the overall light spot is the superposition of the refraction light spot + the total reflection light spot.

[0049] The optical path diagram in the polarization direction includes three parts: the first part of the light is refracted from the top light incident surface 5 of the light incident hole to the plane light exit surface 2 of the ice crystal pattern and then directly refracted out. The direction of this part of the light exit light is consistent, forming the main part of the polarized light spot; the second part of the light is refracted from the front side wall light incident surface 7 of the light incident hole to the front TIR reflective optical surface 8 of the lens, and then totally reflected to the plane light exit surface 2 of the ice crystal pattern and then directly refracted out. The final light exit light direction of this part is consistent with the direction of the incident light; the third part of the light is refracted from the back side wall light incident surface 5 of the light incident hole to the back TIR reflective optical surface 8 of the lens, and then totally reflected to the plane light exit surface 2 of the ice crystal pattern and then directly refracted out. The final light exit light direction of this part is opposite to the direction of the incident light. The directions of the three parts of the light exit light are finally consistent, and they are superimposed to form a polarized light spot.

[0050] The optical path diagram in the vertical polarization direction includes two parts: the first part of the light is refracted through the light incident surface 5 at the top of the light incident hole to the plane light exit surface 2 of the ice crystal pattern and then directly refracted out. Since the light incident surface in this direction is a wavy free-form 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 through the light incident surface 11 on the side wall of the light incident hole to the TIR reflective optical surface 12 on the side of the lens, and then totally reflected to the plane light exit surface 2 of the ice crystal pattern and then directly refracted out.

[0051] The bottom of the mounting platform 1 is provided with a flat bottom surface 13 to facilitate the smooth contact between the optical body and the lamp and improve the tightness of the installation.

[0052] The bottom of the mounting platform 1 is provided with a mounting buckle 14 to facilitate the quick and secure mounting of the optical body.

[0053] The bottom of the installation platform 1 is provided with an installation positioning column 15, which facilitates the rapid positioning and installation of the optical body and ensures stable installation.

[0054] like Figure 7 The design method of a TIR lens linear polarized light illumination optical structure of the present invention comprises the following steps:

[0055] Step (1): determine the lighting target;

[0056] Step (2): Determine light source information;

[0057] Step (3): Determine the lens design direction and profile features;

[0058] Step (4): optical path design in the polarization direction and optical path design in the perpendicular polarization direction;

[0059] Step (5): Design of mixed light pattern structure on the plane light emitting surface;

[0060] Step (6): lens mold structure design;

[0061] Step (7): making a lens mold;

[0062] Step (8): lens injection molding;

[0063] Step (9): Lens optical verification.

[0064] The optical path design in the polarization direction of step (4) includes the front TIR reflection optical surface design in the polarization direction, the top optical surface design of the light entrance hole in the polarization direction, and the back TIR reflection optical surface design in the polarization direction.

[0065] The optical path design in the vertical polarization direction of step (4) includes the top optical surface design of the light entrance hole in the vertical polarization direction and the two symmetrical TIR reflection optical surface designs in the vertical polarization direction.

[0066] The present invention is provided with a plurality of TIR lenses 3 at the bottom of the optical body, a light entrance hole 4 is provided at the bottom of the inner side of the TIR lens 3, the cross-sectional shape of the TIR lens 3 is set in a trapezoidal shape, the back of the TIR lens 3 is set in a crescent shape with a convex shape on the outside and a concave shape on the middle, a light entrance surface 5 at the top of the light entrance hole 4 is provided, and the light entrance surface 5 at the top of the light entrance hole is set in a wave shape with a convex shape in the middle and concave shapes on both sides, and an ice crystal pattern 6 is provided on the surface of the plane light exit surface 2, so that the light mixing and color mixing in the polarized lighting area are uniform while ensuring the high utilization rate of light, and the structure of the lamp is simplified, and the following beneficial effects are achieved:

[0067] 1. The light-emitting surface of the overall lens is a plane, and it contains multiple lenses inside. Each lens is a TIR lens. All light is precisely controlled through the total reflection surface to improve the overall efficiency of the lens. In addition, the overall lens of this structure can be directly used as the appearance of the lamp, making the lamp structure simpler and saving costs.

[0068] 2. The cross-section of a single lens is a trapezoid, which can accurately control the shape of the light spot, reduce the residual light of the light spot, and improve the utilization rate of light. It is more suitable for use in rectangular and other lighting areas.

[0069] 3. The TIR surface on the back of a single lens is a convex crescent shape with a concave center. Because the TIR surface on the back of a conventional lens is close to a straight line horizontally and has almost no light control ability, there will be fishtail-shaped residual light on the back edge of the formed light spot, which makes the light spot on the side of the lamp not cut off enough. The lens uses a meniscus structure to increase the light control ability in this direction, eliminate the fishtail-shaped residual light, and make the light spot on the backlight side cut off.

[0070] 4. The top light-entering surface of the light-entering hole is a wavy free-form surface that is convex in the middle and concave on both sides. When two patch light sources with different color temperatures are used at the same time, the overall area of ​​the light source becomes larger, and the light-entering surface is close to the light source, and its light control ability is weak. The center of the light spot refracted by the conventional free-form surface will be very bright and the color mixing effect will be poor, which will make the illumination of the lighting area uneven and have obvious color difference. Therefore, the use of a wavy free-form surface is based on the idea that the light-entering surface of each light source in the vertical corresponding area is a concave surface, and multiple concave surfaces are connected to form a wavy structure, so that the light spot transition is more uniform and the illumination of the lighting area is uniform. In addition, since the incident angles of each light source relative to the multiple concave light-entering surfaces are different, the light spot formation is more complex, the color mixing effect is better, and it is more in line with the development trend of intelligent lighting.

[0071] 5. The flat light-emitting surface adopts ice crystal pattern for light mixing. Due to the complex light spot composition of the polarized TIR lens, conventional hexagonal, diamond, Fibonacci and other patterns cannot meet the requirements of uniform light mixing. In order to make the effect better after the light spot is superimposed, the ice crystal pattern is used.

[0072] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A TIR lens linear polarized illumination optical structure, characterized in that: The optical body comprises an optical body, a mounting platform is provided on the top of the optical body, a plane light emitting surface is provided on the top surface of the mounting platform, a plurality of TIR lenses are provided on the bottom of the optical body, a light entrance hole is provided on the bottom inner side of the TIR lens, the cross-sectional shape of the TIR lens is trapezoidal, the back surface of the TIR lens is in a crescent shape with a convex outer side and a concave middle side, a light entrance hole top light entrance surface is provided on the top of the light entrance hole, the light entrance hole top light entrance surface is in a wave shape with a convex middle side and concave sides, and an ice crystal pattern is provided on the surface of the plane light emitting surface.

2. The TIR lens linear polarized light illumination optical structure according to claim 1, characterized in that: A light incident surface is disposed on the front side wall of the light incident hole in front of the light incident hole, and a lens front TIR reflecting optical surface is disposed on the front side of the TIR lens.

3. The TIR lens linear polarized light illumination optical structure according to claim 1, characterized in that: A light incident surface is disposed at the rear of the light incident hole and a TIR reflective optical surface is disposed at the rear of the TIR lens.

4. The TIR lens linear polarized light illumination optical structure according to claim 1, characterized in that: The left and right sides of the light entrance hole are provided with side wall light entrance surfaces, and the side wall light entrance surfaces of the light entrance hole on the left and right sides are symmetrically arranged. The left and right sides of the TIR lens are provided with side TIR reflective optical surfaces of the lens, and the side TIR reflective optical surfaces of the lens on the left and right sides are symmetrically arranged.

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

6. The TIR lens linear polarized light illumination optical structure according to claim 1, characterized in that: A mounting buckle is provided at the bottom of the mounting platform.

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

8. A method for designing a TIR lens linear polarized illumination optical structure, characterized in that: The following steps are involved: Step (1): determine the lighting target; Step (2): Determine light source information; Step (3): Determine the lens design direction and profile features; Step (4): optical path design in the polarization direction and optical path design in the perpendicular polarization direction; Step (5): designing the light-mixing pattern structure of the plane light-emitting surface; Step (6): lens mold structure design; Step (7): making a lens mold; Step (8): lens injection molding; Step (9): Lens optical verification.

9. The design method of the TIR lens linear polarized light illumination optical structure according to claim 1, characterized in that: The optical path design in the polarization direction of step (4) includes a front TIR reflection optical surface design in the polarization direction, a top optical surface design of the light entrance hole in the polarization direction, and a back TIR reflection optical surface design in the polarization direction.

10. The design method of the TIR lens linear polarized light illumination optical structure according to claim 1, characterized in that: The optical path design in the vertical polarization direction of step (4) includes a top optical surface design of the light entrance hole in the vertical polarization direction and a two-symmetric TIR reflection optical surface design in the vertical polarization direction.

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