A polarization mixed-color optical system combining a spliced fresnel lens and a reflecting cup

Abstract

The application discloses a spliced Fresnel lens and a reflective cup combined polarized mixed color optical system, which comprises a multi-color light source, the multi-color light source is covered with a reflective cup, the reflective cup is covered with a spliced Fresnel lens, the spliced Fresnel lens comprises an incident surface and an emitting surface, the emitting surface comprises two or more Fresnel optical tooth assemblies, the Fresnel optical tooth assembly comprises a plurality of Fresnel optical teeth, and the Fresnel optical teeth are all provided with free-form surfaces. The application has the advantages that the structure is simple, the incident light is refracted and deflected by the multiple Fresnel optical tooth assemblies of the emitting surface respectively, a stepped wall washing light spot is formed, the uniform coverage of the whole wall body is realized, meanwhile, the curvature distribution of each free-form surface and the profile shape of each optical tooth are independently adjusted, the overall light spot can be presented as a uniform rectangular distribution on the wall surface, the application requirements of light fixture portability, high-temperature resistance and small-angle mixed color wall washing are met, and the illumination quality and use effect are improved.

Description

Technical Field

[0001] This invention relates to the field of lighting optics technology, specifically to a polarizing color mixing optical system combining a spliced ​​Fresnel lens and a reflector. Background Technology

[0002] With the increasing demands for stage lighting and architectural lighting, the application of colorful lighting effects is becoming more and more widespread. However, current lighting optics design faces the following two shortcomings:

[0003] 1. The smaller the beam angle, the greater the difficulty in color mixing, and the larger the size of the required optical components. At the same time, single-type optical devices have obvious limitations in color mixing effects. Although lenses have good color mixing effects, their temperature resistance is poor and they cannot withstand the high heat generated by high-power light sources. Usually, it is necessary to increase their size to mitigate the heat effect. While reflectors have good temperature resistance, their color mixing effect is not ideal due to their structural characteristics.

[0004] 2. Modern lighting fixtures are increasingly trending towards miniaturization and lightweight design, which conflicts with the aforementioned demands for optical performance and large-sized components.

[0005] In addition, in small-angle wall washing applications, the color mixing is more difficult than with conventional front projection due to the shorter illumination distance. At the same time, the wall washing spot is usually distributed in a fan shape, with a narrower width near the light and gradually expanding towards the far light. The ideal wall washing spot should be a uniform rectangle, which further increases the design difficulty.

[0006] Therefore, in order to avoid the shortcomings of the existing technology, it is necessary to improve the existing technology. Summary of the Invention

[0007] The purpose of this invention is to overcome the shortcomings and deficiencies of the prior art and provide a polarizing color mixing optical system that combines a spliced ​​Fresnel lens and a reflector cup to improve lighting quality and performance.

[0008] This invention is achieved through the following technical solution:

[0009] A polarizing color mixing optical system combining a spliced ​​Fresnel lens and a reflector cup includes a multicolor light source, a reflector cup covering the multicolor light source, a spliced ​​Fresnel lens covering the reflector cup, an incident light surface and an exit light surface, the exit light surface including two or more Fresnel optical tooth assemblies, the Fresnel optical tooth assembly including multiple Fresnel optical teeth, and each Fresnel optical tooth having a freeform surface.

[0010] Furthermore, the light-emitting surface is provided with a plurality of first Fresnel optical teeth, second Fresnel optical teeth and third Fresnel optical teeth in sequence.

[0011] Furthermore, each of the freeform surfaces is generated by mixing no fewer than 5 curved boundaries.

[0012] Furthermore, each of the Fresnel optical tooth components has a different geometric dimension and external profile.

[0013] Furthermore, the light-incident surface is provided with a light-mixing microstructure.

[0014] Furthermore, the reflector cup includes an entrance aperture, a wide reflective surface, a long reflective surface, and an exit aperture.

[0015] Furthermore, it also includes a light source bracket for positioning and installing the multicolor light source.

[0016] Furthermore, the light source bracket is provided with positioning screw holes, heat dissipation holes and centering limit mounting holes, the centering limit mounting holes are provided with reflective inclined surfaces, and the light source bracket is provided with reflector cup positioning mounting protrusions.

[0017] Furthermore, the reflector is made of high-temperature resistant material and is a quadrilateral reflector.

[0018] Furthermore, it also includes a PCB board for mounting the multicolor light source.

[0019] Compared to existing technologies, this invention incorporates a spliced ​​Fresnel lens within the reflector cup lid. The spliced ​​Fresnel lens includes an incident light surface and an exit light surface. The exit light surface comprises two or more Fresnel optical tooth assemblies, each containing multiple Fresnel optical teeth, all of which have free-form surfaces. Light emitted from multiple light sources of different colors propagates in two parts: one part is direct light, propagating forward without interference from optical elements, with a regularly arranged and distinct color distribution; the other part is reflected by the reflector cup and then emitted. By adjusting the curvature parameters of the reflector cup's reflective surface, the reflected light spot corresponding to any reflective surface can completely cover the direct light spot, thereby altering the spatial distribution of light from different color light sources. The reflector cup initially mixes colors at the reflected light level. Since reflected light dominates the total luminous flux, a large-angle light spot with most of the mixed light and colors is obtained after passing through the reflector cup. This large-angle light spot is then incident on the incident surface of the spliced ​​Fresnel lens. The incident light is refracted and deflected by multiple sets of Fresnel optical teeth on the exit surface, forming a stepped wall-washing light spot, achieving uniform coverage of the entire wall. At the same time, by independently adjusting the curvature distribution of each free-form surface and the contour shape of each optical tooth, the overall light spot can be made to present a uniform rectangular distribution on the wall, achieving the ideal wall-washing lighting effect. This achieves lightweight lighting fixtures while meeting the application requirements of high-temperature resistance and small-angle color mixing wall washing, thereby improving lighting quality and usage effect. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention 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 the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the polarizing and color mixing optical system of the present invention, which combines a spliced ​​Fresnel lens with a reflector cup.

[0022] Figure 2 This is an exploded view of the structure of the polarizing color mixing optical system of the present invention, which combines a spliced ​​Fresnel lens with a reflector cup.

[0023] Figure 3 This is a schematic diagram of the structure of the spliced ​​Fresnel lens of the present invention;

[0024] Figure 4 This is a top view of the spliced ​​Fresnel lens of the present invention;

[0025] Figure 5 This is a schematic diagram of the reflector cup of the present invention;

[0026] Figure 6 This is a schematic diagram of the structure of the light source support of the present invention;

[0027] Figure 7 This is the optical path diagram of the reflector of the present invention;

[0028] Figure 8 This is the optical path diagram of the spliced ​​Fresnel lens of the present invention;

[0029] Figure 9 This is a light spot diagram of the polarizing color mixing optical system of the present invention, which combines a spliced ​​Fresnel lens with a reflector cup.

[0030] In the diagram: 1-Multicolor light source; 2-Reflector cup; 3-Spliced ​​Fresnel lens; 4-Incident surface; 5-Emitting surface; 6-Freeform surface; 7-First Fresnel optical tooth; 8-Second Fresnel optical tooth; 9-Third Fresnel optical tooth; 10-Incident aperture; 11-Wide reflecting surface; 12-Long reflecting surface; 13-Emitting aperture; 14-Light source bracket; 15-Positioning screw hole; 16-Heat dissipation hole; 17-Centered limiting mounting hole; 18-Reflecting slope; 19-Reflector cup positioning mounting protrusion; 20-PCB board. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] like Figures 1 to 9 The present invention discloses a polarizing color mixing optical system combining a spliced ​​Fresnel lens and a reflector cup, comprising a multicolor light source 1, a reflector cup 2 covering the multicolor light source 1, and a spliced ​​Fresnel lens 3 covering the reflector cup 2. The spliced ​​Fresnel lens 3 includes an incident light surface 4 and an exit light surface 5. The exit light surface 5 includes two or more Fresnel optical tooth assemblies, and the Fresnel optical tooth assembly includes multiple Fresnel optical teeth, each of which is provided with a freeform surface 6. The light emitted from multiple light sources of different colors propagates in two parts: one part is direct light, which propagates directly forward without interference from optical elements, and its light spot color distribution is regularly arranged with distinct colors; the other part is reflected by reflector 2 and then emitted. By adjusting the curvature parameters of the reflective surface of reflector 2, the reflected light spot corresponding to any reflective surface can completely cover the direct light spot, thereby changing the spatial distribution of light from different color light sources and achieving preliminary color mixing at the reflected light level. Since the reflected light dominates the total luminous flux, a partially mixed light can be obtained after passing through the reflector. A large-angle light spot with mixed colors is then incident on the incident surface 4 of the spliced ​​Fresnel lens 3. The incident light is refracted and deflected by multiple sets of Fresnel optical teeth on the exit surface 5, forming a stepped wall-washing light spot to achieve uniform coverage of the entire wall. At the same time, by independently adjusting the curvature distribution of each free-form surface and the contour shape of each optical tooth, the overall light spot can be made to present a uniform rectangular distribution on the wall, achieving an ideal wall-washing lighting effect. This achieves lightweight lighting fixtures while meeting the application requirements of high-temperature resistance and small-angle mixed color wall washing, thereby improving lighting quality and usage effect.

[0033] The light-emitting surface 5 is provided with a number of first Fresnel optical teeth 7, second Fresnel optical teeth 8 and third Fresnel optical teeth 9 in sequence. The light is refracted and deflected by the three sets of Fresnel optical teeth on the light-emitting surface 5 to form a stepped wall-washing light spot: the third Fresnel optical teeth 9 refract the light to the top area of ​​the wall, the second Fresnel optical teeth 8 correspond to the middle and lower part of the wall, and the first Fresnel optical teeth 7 correspond to the bottom of the wall. The three work together to achieve uniform coverage of the entire wall.

[0034] Each of the freeform surfaces 6 is generated by mixing no fewer than 5 curved boundaries, resulting in better light mixing effects.

[0035] Each Fresnel optical tooth assembly has a different geometry and shape, forming a stepped wall-washing spot that works together to achieve uniform coverage of the entire wall.

[0036] The light-incident surface 4 is equipped with a light-mixing microstructure. The light-incident surface 4 is designed as a light-mixing structure, which can perform secondary homogenization and color mixing on the light spot emitted from the reflector cup 2, thereby achieving a completely uniform light mixing effect.

[0037] As one specific implementation, the reflector cup 2 includes an entrance aperture 10, a wide reflective surface 11, a long reflective surface 12, and an exit aperture 13.

[0038] It also includes a light source bracket 14 for positioning and installing the multicolor light source 1, which facilitates the positioning and installation of the multicolor light source 1.

[0039] The light source bracket 14 is provided with positioning screw holes 15, heat dissipation holes 16 and centering limit mounting holes 17. The centering limit mounting holes 17 are provided with reflective slopes 18. The light source bracket 14 is provided with reflector cup positioning mounting protrusions 19. The light inlet hole 10 of the reflector cup 2 is fitted around the reflector cup positioning mounting protrusions 19 to form a centering limit function.

[0040] The reflector cup 2 is made of high-temperature resistant material, preferably high-reflectivity aluminum. It is manufactured by stamping and splicing process. The reflector cup 2 is a quadrilateral reflector cup, but it can also be adjusted to be circular according to actual optical requirements.

[0041] It also includes a PCB board 20 for mounting the multicolor light source 1, which facilitates the electrical connection and stable power supply of the multicolor light source 1.

[0042] Optical principles:

[0043] The light emitted from multiple light sources of different colors propagates in two parts: one part is direct light, which propagates directly forward without interference from optical elements, and its light spot color distribution is regularly arranged and clearly distinguishable; the other part is reflected by a reflector and then emitted. By adjusting the curvature parameters of the reflector surface, the reflected light spot corresponding to any reflector surface can completely cover the direct light spot, thereby changing the spatial distribution of light from different color light sources and achieving preliminary color mixing at the reflected light level. Since the reflected light dominates the total luminous flux, a large-angle light spot with most of the light and color mixing can be obtained after passing through the reflector.

[0044] The large-angle light spot then enters the incident surface 4 of the Fresnel lens. This incident surface is designed with a light-mixing structure, allowing for secondary homogenization and color mixing of the light spot emitted from the reflector, thus achieving a completely uniform light mixing effect. Subsequently, the light is refracted and deflected by three sets of Fresnel optical teeth on the emitting surface 5, forming a stepped wall-washing light spot: the third Fresnel optical tooth 9 refracts the light to the top area of ​​the wall, the second Fresnel optical tooth 8 corresponds to the lower middle part of the wall, and the first Fresnel optical tooth 7 corresponds to the bottom of the wall. These three work together to achieve uniform coverage of the entire wall. Simultaneously, by independently adjusting the curvature distribution of each free-form surface and the contour shape of each optical tooth, the overall light spot can be made to present a uniform rectangular distribution on the wall surface, achieving the ideal wall-washing lighting effect.

[0045] 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 principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A polarizing color mixing optical system combining a spliced ​​Fresnel lens and a reflector cup, characterized in that: The system includes a multicolor light source, which is covered with a reflector cup. The reflector cup cover is equipped with a spliced ​​Fresnel lens. The spliced ​​Fresnel lens includes an incident light surface and an exit light surface. The exit light surface includes two or more Fresnel optical tooth assemblies. The Fresnel optical tooth assembly includes multiple Fresnel optical teeth, and each Fresnel optical tooth has a free-form surface.

2. The polarizing and color-mixing optical system combining a spliced ​​Fresnel lens and a reflector cup according to claim 1, characterized in that: The light-emitting surface is provided with a plurality of first Fresnel optical teeth, second Fresnel optical teeth and third Fresnel optical teeth in sequence.

3. The polarizing and color-mixing optical system combining a spliced ​​Fresnel lens and a reflector cup according to claim 1, characterized in that: Each freeform surface is generated by mixing no fewer than 5 curved boundaries.

4. The polarizing color mixing optical system of the combination of spliced ​​Fresnel lens and reflector cup according to claim 1, characterized in that: Each of the Fresnel optical tooth components has a different geometry and shape.

5. The polarizing and color-mixing optical system combining a spliced ​​Fresnel lens and a reflector cup according to claim 1, characterized in that: The light-incident surface is provided with a light-mixing microstructure.

6. The polarizing color mixing optical system of the combination of spliced ​​Fresnel lens and reflector cup according to claim 1, characterized in that: The reflector cup includes an entrance aperture, a wide reflective surface, a long reflective surface, and an exit aperture.

7. The polarizing and color-mixing optical system of the combination of spliced ​​Fresnel lens and reflector cup according to claim 1, characterized in that: It also includes a light source bracket for positioning and installing the multicolor light source.

8. The polarizing color mixing optical system of the combination of spliced ​​Fresnel lens and reflector cup according to claim 7, characterized in that: The light source bracket is provided with positioning screw holes, heat dissipation holes and centering limit mounting holes. The centering limit mounting holes are provided with reflective slopes, and the light source bracket is provided with reflector cup positioning mounting protrusions.

9. The polarizing color mixing optical system of the combination of spliced ​​Fresnel lens and reflector cup according to claim 1, characterized in that: The reflector is made of high-temperature resistant material and is a quadrilateral reflector.

10. The polarizing and color-mixing optical system of the combination of spliced ​​Fresnel lens and reflector cup according to claim 1, characterized in that: It also includes a PCB board for mounting the multicolor light source.

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