Low-glare high-luminous-efficiency optical structure, street lamp and projection lamp
By designing a low-glare and high-light efficiency optical structure, the lens light exit adopts a multi-curvature arc surface design and baffle control, which solves the problems of uneven illumination and glare, and achieves a more uniform lighting effect and higher light effect.
Patent Information
- Application Number
- CN202510433142.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-08
- Publication Date
- 2025-07-08
AI Technical Summary
The existing lighting systems have problems such as insufficient illumination uniformity, serious glare interference, and low light utilization rate.
Adopting a low-glare and high-light efficiency optical structure, the lens light exit end is designed as multiple side light exit surfaces with the same curvature and multiple middle light exit surfaces with different curvatures. The light rays are deflected through the arc surface to achieve uniform dispersion or focus, avoid energy concentration or hollowing, and control light projection with the baffle.
Improves illumination uniformity, reduces glare, improves light utilization, and meets the lighting needs of different scenarios.
Smart Images
Figure CN120274237A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of lighting fixtures, and in particular to an optical structure with low glare and high luminous efficiency, a street lamp, and a floodlight. Background Art
[0002] The optical performance of lighting fixtures directly affects the visual comfort and functional requirements of users. Whether it is a classroom, an office, an industrial workshop, or a commercial space, good lighting design should meet the following core requirements: First, uniform light distribution: avoid local overbrightness or overdarkness, ensure uniform illuminance in the target area, and prevent visual fatigue; Second, sufficient illuminance: meet the brightness requirements of different scenarios, such as reading, fine operations, or long-distance observation; Third, effective glare control: avoid direct light or reflected light from entering the human eye, causing discomfort or vision damage. However, many current lighting systems still have problems such as unqualified illuminance uniformity, serious glare interference, and low light utilization rate. Summary of the Invention
[0003] The technical problem to be solved by the present invention is: to provide an optical structure that can ensure uniform illuminance, reduce glare, and improve light utilization rate.
[0004] To solve the above technical problem, the first technical solution adopted by the present invention is: an optical structure with low glare and high luminous efficiency, including a light source and a lens; the light source faces the light incident end of the lens, and the light emitting end of the lens has two symmetrically arranged side light emitting surfaces and a middle light emitting surface located between the two side light emitting surfaces. The two side light emitting surfaces are inclined towards the central axis of the lens. The side light emitting surface is formed by a plurality of arc surfaces with the same curvature, and the middle light emitting surface is formed by a plurality of arc surfaces with different curvatures.
[0005] To solve the above technical problem, the second technical solution adopted by the present invention is: a street lamp, including a street lamp housing and an optical structure with low glare and high luminous efficiency arranged on the street lamp housing, and the optical structure with low glare and high luminous efficiency is the optical structure with low glare and high luminous efficiency described in the above first technical solution.
[0006] To solve the above technical problem, the third technical solution adopted by the present invention is: a floodlight, including a floodlight housing and an optical structure with low glare and high luminous efficiency arranged on the floodlight housing, and the optical structure with low glare and high luminous efficiency is the optical structure with low glare and high luminous efficiency described in the above first technical solution.
[0007] The beneficial effects of the present invention are as follows: The light-emitting end of the lens is provided with a side light-emitting surface formed by a plurality of arc surfaces with the same curvature and a middle light-emitting surface formed by a plurality of arc surfaces with different curvatures. When the light emitted by the light source exits from the side light-emitting surface, since each arc surface deflects the incident light according to a fixed curvature, the light is evenly dispersed or focused, thereby reducing the background light of the light spot; when the light emitted by the light source exits from the middle light-emitting surface, since the deflection angles of the incident light by the arc surfaces with different curvatures are different (that is, the larger the curvature, the greater the deflection), the light forms a continuous or stepped light angle distribution in different regions, avoiding the energy concentration or void caused by a single deflection angle, and making the light spot more uniform. Furthermore, the effect of improving the illumination uniformity and reducing glare is achieved. BRIEF DESCRIPTION OF THE DRAWINGS
[0008] Figure 1 FIG. is a schematic diagram of an optical structure with low glare and high luminous efficiency proposed by the present invention; Figure 2 FIG. is a schematic diagram of the optical path of an optical structure with low glare and high luminous efficiency applied to a blackboard lamp proposed by the present invention; Figure 3 FIG. is a light distribution curve diagram of an optical structure with low glare and high luminous efficiency applied to a blackboard lamp; Figure 4 FIG. is an illumination schematic diagram of an optical structure with low glare and high luminous efficiency applied to a blackboard lamp; Reference numeral description: 1. Light source; 2. Lens; 21. Side light-emitting surface; 22. Middle light-emitting surface; 23. Side light-incident surface; 24. Middle light-incident surface; 3. Baffle; 4. Blackboard. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0009] In order to explain in detail the technical content, the achieved objectives and the effects of the present invention, the following is described in conjunction with the embodiments and with reference to the accompanying drawings.
[0010] Please refer to Figure 1 As shown in the figure, an optical structure with low glare and high luminous efficiency of the present invention includes a light source 1 and a lens 2; the light source 1 faces the light-incident end of the lens 2, and the light-emitting end of the lens 2 has two symmetrically arranged side light-emitting surfaces 21 and a middle light-emitting surface 22 located between the two side light-emitting surfaces 21. The two side light-emitting surfaces 21 are inclined towards the central axis of the lens 2. The side light-emitting surface 21 is formed by a plurality of arc surfaces with the same curvature, and the middle light-emitting surface 22 is formed by a plurality of arc surfaces with different curvatures.
[0011] Working principle: The light-emitting end of the lens 2 is provided with a side light-emitting surface 21 formed by multiple arc surfaces with the same curvature and a middle light-emitting surface 22 formed by multiple arc surfaces with different curvatures. When the light rays emitted by the light source 1 are emitted from the side light-emitting surface 21, since each arc surface deflects the incident light rays according to a fixed curvature, the light rays are evenly dispersed or focused, thereby reducing the background light of the light spot; when the light rays emitted by the light source 1 are emitted from the middle light-emitting surface 22, since the deflection angles of the incident light rays by the arc surfaces with different curvatures are different (that is, the greater the curvature, the greater the deflection), the light rays form a continuous or stepped light ray angle distribution in different regions, avoiding the energy concentration or void caused by a single deflection angle, and making the light spot more uniform. Furthermore, the effect of improving the illumination uniformity and reducing glare is achieved.
[0012] In some embodiments, please refer to Figure 1 As shown, the light-incident end of the lens 2 has two relatively arranged side light-incident surfaces 23 and a middle light-incident surface 24 located between the two side light-incident surfaces 23, and the middle light-incident surface 24 is formed by multiple arc surfaces with different curvatures. Part of the light rays emitted by the light source 1 will be refracted by the middle light-incident surface 24 and then refracted by the middle light-emitting surface 22, which can improve the illumination uniformity while deflecting and refracting the concentrated light rays emitted by the light source 1. The middle light-incident surface 24 is also formed by multiple arc surfaces with different curvatures.
[0013] It should be noted that theoretically, the more arc surfaces with different curvatures, the better the illumination uniformity effect. However, considering the difficulty of mold production, preferably, the middle light-incident surface 24 is formed by 3 or 4 or 5 arc surfaces with different curvatures, and most preferably, the middle light-incident surface 24 is formed by 3 arc surfaces with different curvatures.
[0014] Regarding the arc surfaces with different curvatures forming the middle light-incident surface 24, the curvature of the arc surfaces of the middle light-incident surface 24 can gradually increase from one side light-incident surface 23 to the other side light-incident surface 23; it can also be that the curvatures of the arc surfaces of the middle light-incident surface 24 gradually increase or decrease respectively towards the two side light-incident surfaces 23; or it can be that the arc surfaces with different curvatures are arranged in a disorderly manner to form the middle light-incident surface 24.
[0015] In some embodiments, please refer to Figure 1 As shown, the range of the light rays emitted by the light source 1 entering the middle light-incident surface 24 is A, and A is 70° to 80°. By limiting the range of the light rays of the light source 1 entering the middle light-incident surface 24, the illumination uniformity of the final light output is ensured.
[0016] It should be noted that taking the central axis of the lens 2 to divide A into range B and range C, B and C can be equal or not equal.
[0017] In some embodiments, the edge of the lens 2 is a reflecting surface. After part of the light rays emitted by the light source 1 enter the lens 2 from the side light incident surface 23, the relatively marginal light rays can be reflected by the reflecting surface of the lens 2 and refracted out from the side light emitting surface 21, so as to improve the utilization rate of light.
[0018] In some embodiments, please refer to Figure 1 As shown, the anti-glare angle between the connection line between the outermost point of the middle light emitting surface 22 and the edge of the light outlet of the lens 2 and the horizontal line is D, and D is 10° to 12°. By defining the anti-glare angle, it is ensured that the direct light emitting surface cannot be seen within the range of 10° to 12° upward viewing of the human eye, thereby reducing the glare effect.
[0019] In some embodiments, the above-mentioned low-glare and high-light-efficiency optical structure further includes a baffle 3. The baffle 3 is arranged at the edge of the light emitting end of the lens 2, and the end face of the baffle 3 facing the central axis of the lens 2 is a reflecting surface. The baffle 3 is used to reflect the light rays refracted out from the side light emitting surface 21 to control the light rays to be projected onto a specified area.
[0020] It should be noted that the setting of the baffle 3 is arranged according to the requirements of the actual lighting scene. The baffle 3 can be a complete annular baffle. Of course, the size lengths or installation heights of each position of the annular baffle can be the same or different.
[0021] The baffle 3 can also be two independent baffles 3 arranged symmetrically. Of course, the size lengths or installation heights of the two independent baffles 3 can be the same or different. For example, in a blackboard lamp, the height of the right baffle 3 is set to any length more than 1 / 3 of the left baffle 3. The lower the height of the right baffle 3, the higher the overall light efficiency, but the corresponding anti-glare effect will be weakened.
[0022] It should be noted that the baffle 3 is made of a light-tight material, preferably a metal material, which can cut off the excess light rays and uncontrolled light rays projected onto the baffle 3 at the light emitting end of the lens 2.
[0023] Embodiment 1 Apply the above-mentioned low-glare and high-light-efficiency optical structure to a blackboard lamp, as Figure 2 As shown, after the light rays are processed by the lens 2 and the baffle 3, the light rays are evenly projected onto the surface of the blackboard 4 in a cross-light distribution manner, avoiding the gradual attenuation of the illuminance from top to bottom on the surface of the blackboard 4. As Figure 3 As shown, the blackboard lamp adopting the low-glare and high-light-efficiency optical structure is asymmetrically distributed in the output light distribution curves in the C0-180 plane and the C90-270 plane, and the C90-270 plane is close to the central axis, which can meet the polarized lighting of the blackboard and the near-distance installation; as Figure 4As shown, there are no dark areas around the blackboard 4, above and below. The maximum illuminance on the blackboard 4 is 690 lx, the minimum illuminance is 440 lx, the average illuminance is 552 lx, and the illuminance uniformity is 0.8, thus ensuring that students can clearly see the blackboard 4, while solving the glare problems of students and teachers, improving the eye comfort of students and teachers, and meeting the usage standards of blackboard lights.
[0024] Embodiment 2 A street lamp, in which the above-mentioned optical structure with low glare and high light efficiency is arranged on the street lamp housing, making the illuminance of the street lamp more uniform and reducing the glare feeling of the street lamp.
[0025] Embodiment 3 A floodlight, in which the above-mentioned optical structure with low glare and high light efficiency is arranged on the floodlight housing, making the illuminance of the floodlight more uniform and reducing the glare feeling of the floodlight.
[0026] The above are only the embodiments of the present invention, and do not limit the patent scope of the present invention. Any equivalent transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied in the relevant technical fields, shall be included in the patent protection scope of the present invention by the same token.
Claims
1. An optical structure with low glare and high light efficiency, characterized in that: It includes a light source and a lens; the light source faces the light incident end of the lens, the light exit end of the lens has two symmetrically arranged side light exit surfaces and a middle light exit surface located between the two side light exit surfaces, the two side light exit surfaces are inclined towards the central axis of the lens, the side light exit surface is formed by multiple arc surfaces with the same curvature, and the middle light exit surface is formed by multiple arc surfaces with different curvatures.
2. The optical structure with low glare and high light efficiency according to claim 1, wherein: The light incident end of the lens has two relatively arranged side light incident surfaces and a middle light incident surface located between the two side light incident surfaces, and the middle light incident surface is formed by multiple arc surfaces with different curvatures.
3. The optical structure with low glare and high luminous efficiency according to claim 2, wherein: The curvature of the arc surface of the middle light incident surface gradually increases from one side light incident surface towards the other side light incident surface.
4. The optical structure with low glare and high luminous efficiency according to claim 2, characterized in that: The curvature of the arc surface of the middle light incident surface gradually increases or decreases towards the directions of the two side light incident surfaces respectively.
5. The optical structure with low glare and high luminous efficiency according to claim 2, characterized in that: The range where the light emitted by the light source enters the middle light incident surface is 70° to 80°.
6. The optical structure with low glare and high luminous efficiency according to claim 1, wherein: The edge of the lens is a reflecting surface.
7. The optical structure with low glare and high light efficiency according to claim 1, wherein: The anti-glare angle between the connection line of a point on the outermost edge of the middle light exit surface and the edge of the light exit of the lens and the horizontal line is 10° to 12°.
8. The optical structure with low glare and high luminous efficiency according to claim 1, characterized in that: It further includes a baffle, the baffle is arranged at the edge of the light exit end of the lens, and one end surface of the baffle facing the central axis of the lens is a reflecting surface.
9. A street lamp, comprising a street lamp housing and a low-glare and high-light-efficiency optical structure arranged on the street lamp housing, characterized in that, The low-glare and high-light-efficiency optical structure is the low-glare and high-light-efficiency optical structure according to any one of claims 1 to 8.
10. A floodlight, comprising a floodlight housing and a low-glare and high-light-efficiency optical structure provided on the floodlight housing, characterized in that, The low-glare and high-light-efficiency optical structure is the low-glare and high-light-efficiency optical structure according to any one of claims 1 to 8.