Light supplementing assembly and camera
By using reflectors and microlens array structures in the surveillance camera to adjust the light direction, the glare problem caused by white light filling light is solved, and uniform lighting and glare reduction effects are achieved, improving the user experience.
Patent Information
- Application Number
- CN202422850615.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-20
- Publication Date
- 2025-08-29
- Estimated Expiration
- 2034-11-20
AI Technical Summary
The white light fill-up solution of existing surveillance cameras causes light to directly exit from the center of the lens and its surrounding areas, causing a strong sense of glare and poor user experience.
The light fill component is adopted, including a reflector and a microlens array structure. Through the coordination of the reflective surface and the microlens array structure, the light direction is adjusted, so that the light rays are emitted from the bottom to the top, and the light distribution is uniform and regulated through the microlens array structure.
It effectively reduces the brightness of a single point, ensures uniform lighting effect, and reduces the strong glare feeling when the human eye directly looks at the fill light source, improving the user experience.
Smart Images
Figure CN223282955U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of cameras, in particular to a fill light component and a camera. Background Art
[0002] Surveillance cameras require supplemental lighting to achieve better imaging quality when operating at night. Currently, the primary solution for supplemental lighting in surveillance cameras is to use LED lenses to provide secondary light distribution for the LED light source. These solutions include infrared supplemental lighting and white light supplemental lighting. However, since most of the light is emitted directly from the center of the lens or its surrounding area, white light supplemental lighting can cause strong irritation to the human eye, resulting in glare and a poor user experience. Utility Model Content
[0003] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a fill light component and a camera.
[0004] In order to achieve the above purpose, the present invention adopts the following technical solutions:
[0005] On the one hand, the present invention provides a fill light component, including a fill light source, a reflector and a microlens array structure, the reflector is provided with a reflective cavity, a reflective surface is provided in the reflective cavity, and different sides of the reflective cavity are respectively provided with a light inlet and a light outlet connected thereto, the light inlet and the light outlet are arranged at an angle, the fill light source is arranged below the light inlet, and the microlens array structure covers the light outlet area of the light outlet; part of the light emitted by the fill light source is reflected by the reflective surface to the microlens array structure, and then emitted from the microlens array structure to the target illumination area, and the other part of the light is directly emitted to the microlens array structure, and then emitted from the microlens array structure to the target illumination area.
[0006] Furthermore, the reflective element is a curved plate-shaped structure.
[0007] Furthermore, the reflecting surface is a free-form surface.
[0008] Furthermore, the reflecting surface includes a left arc-shaped portion, a right arc-shaped portion and an upper arc-shaped portion, the left arc-shaped portion and the right arc-shaped portion are arranged opposite to each other, and the left and right sides of the upper arc-shaped portion are smoothly transitioned to the left arc-shaped portion and the right arc-shaped portion respectively.
[0009] Furthermore, the light entrance is located at the lower side of the reflective cavity, and the light exit is located at the rear side of the reflective cavity.
[0010] Furthermore, the light inlet and the light outlet are arranged at a 90-degree angle.
[0011] Furthermore, the microlens array structure includes a plurality of convex lenses arranged in an array, the spherical portions of all the convex lenses are at the same plane height, the side of the convex lens where the spherical portion is located constitutes the incident surface of the microlens array structure, and the side of the convex lens away from the spherical portion constitutes the exit surface of the microlens array structure.
[0012] Furthermore, the incident surface is arranged close to the light outlet.
[0013] Furthermore, the emitting surface is a grained surface.
[0014] On the other hand, the present invention further provides a camera, comprising the above-mentioned fill light assembly.
[0015] Compared with the prior art, the present invention has the following beneficial effects: a fill light assembly includes a fill light source, a reflector, and a microlens array structure, wherein the reflector is provided with a reflective cavity, a reflective surface is provided within the reflective cavity, a light inlet and a light outlet are provided on different sides of the reflective cavity, the light inlet and the light outlet are arranged at an angle, the fill light source is provided below the light inlet, and the microlens array structure covers the light exit area of the light outlet; a portion of the light emitted by the fill light source is reflected by the reflective surface to the microlens array structure, and then emitted from the microlens array structure to the target illumination area, while another portion of the light is directly emitted to the microlens array structure, and then emitted from the microlens array structure to the target illumination area. Through the cooperation of the reflector and the microlens array structure, the fill light source emits light from bottom to top, the reflector performs light path deflection, and combines with the microlens array structure to even out and regulate light distribution, thereby effectively reducing the brightness of a single point, ensuring a uniform lighting effect, and effectively reducing the strong glare produced when the human eye directly looks at the fill light source, thereby improving the user experience.
[0016] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented in accordance with the contents of the specification. In addition, in order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the following preferred embodiments are specifically cited and described in detail as follows. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.
[0018] Figure 1 A structural diagram of a fill light assembly provided in a specific embodiment of the utility model;
[0019] Figure 2 A schematic diagram of the optical path of a fill light assembly provided in a specific embodiment of the utility model;
[0020] Figure 3 A schematic structural diagram of a reflective element in a fill light assembly provided by a specific embodiment of the present utility model;
[0021] Figure 4 A schematic structural diagram of a microlens array structure in a fill light assembly provided in a specific embodiment of the utility model;
[0022] Figure 5 A schematic structural diagram of a microlens array structure in a fill light assembly provided by a specific embodiment of the present utility model from another perspective;
[0023] Figure 6 The present invention is a structural diagram of a fill light assembly provided in another specific embodiment of the present invention.
[0024] Reference numerals
[0025] 1. Fill light source; 2. Reflector; 21. Reflection cavity; 22. Light inlet; 23. Light outlet; 24. Reflection surface; 3. Microlens array structure; 31. Convex lens; 311. Incident surface; 312. Exit surface; 100. Light. DETAILED DESCRIPTION
[0026] The following will be combined with the specific embodiments of the present invention to clearly and completely describe the technical solutions of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.
[0027] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.
[0028] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.
[0029] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.
[0030] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.
[0031] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.
[0032] like Figures 1 to 6As shown, an embodiment of the present invention provides a fill light component, including a fill light source 1, a reflector 2 and a microlens array structure 3. The fill light source 1 is an LED light source, which can be a reflector 2 provided with a reflective cavity 21, a reflective surface 24 provided in the reflective cavity 21, and a light inlet 22 and a light outlet 23 connected thereto are provided on different sides of the reflective cavity 21. The light inlet 22 and the light outlet 23 are arranged at an angle. The fill light source 1 is arranged below the light inlet 22, and the microlens array structure 3 covers the light outlet area of the light outlet 23; a part of the light 100 emitted by the fill light source 1 is reflected by the reflective surface 24 to the microlens array structure 3, and then emitted from the microlens array structure 3 to the target illumination area, and the other part of the light 100 is directly emitted to the microlens array structure 3, and then emitted from the microlens array structure 3 to the target illumination area.
[0033] from Figure 2 It can be seen that the fill light source 1 emits light 100 from bottom to top. Most of it is reflected by the reflector 2 to the microlens array structure 3 and then emitted. In the present invention, through the cooperation of the reflector 2 and the microlens array structure 3, the fill light source 1 is set below the light inlet 22, so that the initial emission direction of the light 100 is from bottom to top, so that the light 100 can be effectively captured and guided by the reflective surface 24. The reflector 2 performs light path turning and combines with the microlens array structure 3 to even the light and regulate the light distribution, thereby effectively reducing the brightness of a single point, ensuring a uniform lighting effect, and effectively reducing the strong glare generated when the human eye looks directly at the fill light source 1, thereby improving the user experience.
[0034] In one embodiment, the reflector 2 is a curved plate-like structure. Such a design can optimize the reflection and guiding efficiency of the light 100. The reflector 2 is preferably made of a metal material with high reflectivity such as aluminum alloy, or a plastic surface plated with silver to improve the reflective performance.
[0035] In one embodiment, the reflective surface 24 is a free-form surface to optimize the reflection path of the light 100 and enhance the fill-light effect. The free-form surface has a flexible geometric shape and can adapt to complex optical requirements.
[0036] The free-form surface of reflective surface 24 is designed using parametric modeling tools. The shape of the free-form surface is controlled by multiple parameters, such as curvature, tilt angle, and surface tangent direction. This design allows for precise control of the reflection path of light 100 to achieve the desired optical effect. Specifically, the generatrix of the free-form reflector is determined as follows:
[0037] Let the angle between the incident light 100 and the positive z-axis be θ1 and its unit vector be I. Let the angle between the outgoing light 100 and the positive z-axis be θR and its unit vector be R. When 90°≤θI≤180°, θR=(180°-θI)*α, α∈[0,0.1]. When 45°≤θI<90°, θR=0. When 0°≤θI<45°, θR=θI. For light 100 within 45°≤θI≤180°, its corresponding free-form curve tangent vector Tn=In+Rn, the slope of the line on which the tangent vector Tn lies is kn=Tn(y) / Tn(z), and the coordinates of two adjacent points on the free-form curve are (zn,yn) and (zn+1,yn+1), then zn+1=z(n)*(kn-tan(θI,n)) / (kn-tan(θI,n+1));
[0038] yn+1=zn+1*tan(θI,n+1);
[0039] The shape of the free-form surface can be obtained by the iterative method.
[0040] The reflective surface 24 can be made of aluminum alloy or silver-plated plastic because of its excellent reflective properties and easy processing. During the manufacturing process, CNC processing or 3D printing technology can be used to achieve high-precision free-form surfaces, ensuring the accuracy and consistency of the shape.
[0041] In one embodiment, the reflecting surface 24 includes an integrally formed left arc portion, a right arc portion and an upper arc portion. The left arc portion and the right arc portion are arranged opposite to each other, and the left and right sides of the upper arc portion are smoothly transitioned to the left arc portion and the right arc portion respectively.
[0042] Specifically, the reflective surface 24 consists of a left curved portion, a right curved portion, and an upper curved portion. These curved areas are designed to optimize the reflection path of light 100 and achieve a uniform reflection effect. The left and right curved portions are respectively arranged on either side of the reflective surface 24, substantially symmetrically about the axis of the light source, forming a structure surrounding the light source. The upper curved portion is located above the left and right curved portions and is designed to capture light 100 scattered from the top of the light source and reflect it toward the microlens array structure 3.
[0043] In one embodiment, the light inlet 22 is located at the bottom side of the reflective cavity 21 , and the light outlet 23 is located at the rear side of the reflective cavity 21 . The light inlet 22 and the light outlet 23 are arranged at a ninety-degree angle.
[0044] like Figure 1As shown, light inlet 22 is located on the lower side of reflective cavity 21 and can be designed as a semicircular opening. The size of light inlet 22 is designed based on the size of fill light source 1 and the required incident light flux. Light outlet 23 is located on the rear side of reflective cavity 21 and can also be a semicircular opening. The size and shape of light outlet 23 are optimized based on the expected light output angle and light distribution 100 to ensure that light 100 is evenly projected onto microlens array structure 3.
[0045] In one embodiment, the microlens array structure 3 includes a plurality of convex lenses 31 arranged in an array. The spherical surfaces of all convex lenses 31 are at the same plane height. The side of the convex lenses 31 on which the spherical portions are located constitutes an incident surface 311 of the microlens array structure 3. The incident surface 311 is located near the light outlet 23. The side of the convex lenses 31 facing away from the spherical portions constitutes an exit surface 312 of the microlens array structure 3.
[0046] like Figure 4 and Figure 5 As shown, each convex lens 31 can be designed to have the same size and shape to ensure that light 100 obtains a consistent refraction effect when passing through each lens. The spherical portions of all convex lenses 31 are located at the same plane height to ensure that the height of each spherical portion is consistent. The incident light 100 can evenly penetrate each convex lens 31, thereby improving the overall uniformity and focusing ability of the light 100.
[0047] The incident surface 311 is formed by the same plane containing the spherical surfaces of all convex lenses 31. This surface is the initial surface through which light 100 enters the microlens array structure 3 and is designed as a smooth spherical surface to reduce optical loss and reflection. The exit surface 312 is the side of the convex lens 31 facing away from the spherical surface. This surface ensures that light 100 achieves the desired divergence effect after passing through it.
[0048] In one embodiment, the exit surface 312 is a textured surface, that is, the surface has a fine texture structure, which can effectively change the exit characteristics of the light 100. In this way, the texture design of the exit surface 312 can effectively increase the scattering of the light 100, making the exiting light 100 more evenly distributed, thereby reducing light spots and highlight areas.
[0049] like Figure 6 As shown, in one embodiment, two reflective elements 2 can share a microlens array structure 3 to meet specific scene requirements.
[0050] The embodiment of the present invention further provides a camera, comprising the above-mentioned fill light assembly. Except for the upper fill light assembly, the rest of the structure of the camera is the same as that in the prior art, and will not be described in detail here.
[0051] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and such modifications or substitutions are intended to be within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be subject to the scope of protection of the claims.
Claims
1. A fill light component, characterized in that: The invention comprises a fill light source, a reflector and a microlens array structure, wherein the reflector is provided with a reflective cavity, a reflective surface is provided in the reflective cavity, a light inlet and a light outlet are provided on different sides of the reflective cavity, the light inlet and the light outlet are arranged at an angle, the fill light source is arranged below the light inlet, and the microlens array structure covers the light outlet area of the light outlet; part of the light emitted by the fill light source is reflected by the reflective surface to the microlens array structure, and then emitted from the microlens array structure to the target illumination area, and the other part of the light is directly emitted to the microlens array structure, and then emitted from the microlens array structure to the target illumination area.
2. The fill light assembly according to claim 1, characterized in that: The reflective element is a curved plate-shaped structure.
3. The fill light assembly according to claim 1, wherein: The reflecting surface is a free-form surface.
4. The fill light assembly according to claim 1, wherein: The reflecting surface includes a left arc-shaped portion, a right arc-shaped portion and an upper arc-shaped portion. The left arc-shaped portion and the right arc-shaped portion are arranged opposite to each other, and the left and right sides of the upper arc-shaped portion are smoothly transitioned with the left arc-shaped portion and the right arc-shaped portion respectively.
5. The fill light assembly according to claim 1, characterized in that: The light entrance is located at the lower side of the reflection cavity, and the light exit is located at the rear side of the reflection cavity.
6. The fill light assembly according to claim 1, characterized in that: The light inlet and the light outlet are arranged at a 90-degree angle.
7. The fill light assembly according to claim 1, characterized in that: The microlens array structure includes a plurality of convex lenses arranged in an array, wherein the spherical surfaces of all the convex lenses are at the same plane height, the side where the spherical portion of the convex lens is located constitutes the incident surface of the microlens array structure, and the side of the convex lens away from the spherical portion constitutes the exit surface of the microlens array structure.
8. The fill light assembly according to claim 7, characterized in that: The incident surface is arranged close to the light outlet.
9. The fill light assembly according to claim 7, characterized in that: The exit surface is a graining surface.
10. A camera, characterized in that: The invention comprises the fill light assembly according to any one of claims 1 to 9.