Monitoring system

Abstract

The application discloses a monitoring system, and relates to the field of camera technology. The monitoring system comprises two light-emitting assemblies and a lens assembly. The two light-emitting assemblies are symmetrically arranged on the two sides of the lens assembly. The lens assembly is configured to form a first included angle with a horizontal plane. The lens assembly is used for generating a first image with a first depth of field in response to light rays of the two light-emitting assemblies. The light-emitting assembly comprises a light-emitting element and a lens. The central axis of the light-emitting element forms a first included angle with the horizontal plane, so that the optical axis is coplanar with the central axis of the two light-emitting assemblies. The lens comprises an incident surface, a reflecting surface and an emitting surface. The slope of the first reflecting surface of the reflecting surface close to the lens assembly is greater than the slope of the second reflecting surface of the reflecting surface except the first reflecting surface, so that the light rays of the light-emitting element are defined as the light rays emitted from the incident surface, reflected by the first reflecting surface and the second reflecting surface, and emitted from the emitting surface. The light intensity increases along the first depth of field.

Description

Technical Field

[0001] This application belongs to the field of camera technology, specifically relating to a surveillance system. Background Technology

[0002] During the shooting process, optimizing the light distribution through a supplementary lighting system can improve the shooting quality. Therefore, the supplementary lighting effect of the supplementary lighting system will directly determine the quality of the shooting.

[0003] In related technologies, the supplementary lighting system includes at least two light sources and at least two lenses. The at least two light sources are arranged sequentially at intervals, and each lens corresponds to one light source. The light beam emitted by the light source is emitted after passing through the corresponding lens. After passing through the corresponding lens, the light beams from two adjacent light sources have a first light energy range and a second light energy range, respectively. Because the two light sources are arranged adjacently, there is an overlap between the first and second light energy ranges. Moreover, under the action of the lenses, both the first and second light energy ranges are symmetrically distributed about the optical axis of their respective light sources. Therefore, the overlap area is relatively large, and the target object is likely to be located within the overlap area. Since there is more light energy in the overlap area, more light energy is irradiated onto the target object, resulting in overexposure and making it impossible to identify the detailed information of the target object. Summary of the Invention

[0004] The purpose of this application is to provide a monitoring system that can solve the problem in related technologies where supplementary lighting systems are prone to overexposure, resulting in the inability to identify target objects.

[0005] This application provides a monitoring system, including:

[0006] Two light-emitting components and a lens assembly are provided, the two light-emitting components being symmetrically arranged on both sides of the lens assembly; the lens assembly is configured such that its optical axis forms a first angle with the horizontal plane, and the lens assembly is used to generate a first image with a first depth of field in response to the supplementary light from the two light-emitting elements.

[0007] The light-emitting assembly includes a light-emitting element and a lens. The light-emitting element is configured such that its central axis forms the first angle with the horizontal plane, so that the optical axis is coplanar with the central axes of the two light-emitting assemblies. The lens includes an incident surface, a reflective surface, and an exiting surface. The slope of the first reflective surface near the lens assembly is greater than the slope of the second reflective surface other than the first reflective surface, so that the supplementary light is defined as light entering the light-emitting element from the incident surface can be reflected by the first and second reflective surfaces and exited from the exiting surface, and the intensity of the supplementary light increases along the first depth of field range.

[0008] In this embodiment, because the slope of the first reflective surface is greater than that of the second reflective surface, the intensity of the supplementary light increases along the first depth of field. The first depth of field is the distance range from near objects that the lens assembly can clearly capture to distant objects that it can clearly capture. The increase in the intensity of the supplementary light along this range indicates that the supplementary light becomes stronger from a position closer to the lens assembly to a position farther away. Therefore, the supplementary light is weaker near the lens assembly and stronger at positions farther away. Consequently, the light intensity decreases near the lens assembly and increases at positions farther away, thus avoiding overexposure at close range and improving the recognition of the target object. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the monitoring system disclosed in the embodiments of this application;

[0010] Figure 2 This is a schematic diagram of the light area distribution of the first and second light-emitting elements disclosed in the embodiments of this application;

[0011] Figure 3 This is a schematic diagram of the structure of the first lens disclosed in the embodiments of this application;

[0012] Figure 4 The light intensity I1 of the light emitted by the first light-emitting element disclosed in the embodiments of this application varies with the polarization angle. The graph of the changing function;

[0013] Figure 5 The light intensity I2 emitted by the second light-emitting element disclosed in the embodiments of this application varies with the polarization angle. The graph of the changing function;

[0014] Figure 6 This is a schematic diagram showing the distribution of the strong light area and the weak light area of ​​the monitoring system disclosed in the embodiments of this application;

[0015] Figure 7 This is a schematic diagram of the structure of the first lens disclosed in an embodiment of this application from another perspective.

[0016] Explanation of reference numerals in the attached figures:

[0017] 100 - First light-emitting element; 110 - First central axis;

[0018] 200 - Second light-emitting element; 210 - Second central axis;

[0019] 300 - First lens;

[0020] 400 - Second lens;

[0021] 510 - Incident surface; 511 - First transmission surface; 512 - Second transmission surface; 513 - Third transmission surface; 514 - Fourth transmission surface; 515 - Fifth transmission surface;

[0022] 520 - Reflective surface; 521 - First reflective surface; 522 - Second reflective surface; 523 - Third reflective surface; 524 - Fourth reflective surface;

[0023] 530 - Exposing surface;

[0024] 610 - First optical zone; 620 - Second optical zone; 630 - Third optical zone; 640 - Fourth optical zone;

[0025] 710 - High-light area; 720 - Low-light area;

[0026] 800 - Lens assembly; 810 - Optical axis;

[0027] 900 - First plane;

[0028] β - First included angle. Detailed Implementation

[0029] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0030] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0031] The supplementary lighting system, camera device, and camera method provided in this application will be described in detail below with reference to the accompanying drawings and through specific embodiments and application scenarios.

[0032] Please refer to Figures 1-7The supplementary lighting system disclosed in this application includes a first light-emitting element 100, a second light-emitting element 200, a first lens 300, and a second lens 400. The first light-emitting element 100 and the second light-emitting element 200 serve as light sources and are capable of emitting light beams. The first lens 300 and the second lens 400 have light-focusing capabilities and can converge the light beams emitted by the first light-emitting element 100 and the second light-emitting element 200, thereby allowing more light energy in the light beams to reach the target object and improving the clarity of the target object.

[0033] The first light-emitting element 100 and the second light-emitting element 200 are arranged adjacent to each other. In this embodiment, for example... Figure 1 As shown, the central axis of the first light-emitting element 100 and the central axis of the second light-emitting element 200 are parallel to each other. Both the first lens 300 and the second lens 400 have a light-incident surface 510. The first light-emitting element 100 faces the light-incident surface 510 of the first lens 300, and the second light-emitting element 200 faces the light-incident surface 510 of the second lens 400. Therefore, the light beam emitted by the first light-emitting element 100 can pass through the first lens 300, and the light beam emitted by the second light-emitting element 200 can pass through the second lens 400.

[0034] Optionally, the light beam emitted by the first light-emitting element 100 can be emitted after refraction by the first lens 300, or after refraction and reflection by the first lens 300; similarly, the light beam emitted by the second light-emitting element 200 can be emitted after refraction by the second lens 400, or after refraction and reflection by the second lens 400. The first light-emitting element 100 and the second light-emitting element 200 can be light-emitting chips, supplementary lights, or other light-emitting elements. In practical applications, the first light-emitting element 100 and the second light-emitting element 200 can be respectively mounted on a carrier, and the carrier can be mounted on the housing of the supplementary lighting system.

[0035] like Figure 2As shown, the light beam emitted by the first light-emitting element 100, after passing through the first lens 300, forms a first light region 610 and a second light region 620. The first light region 610 is located on the side of the central axis of the first light-emitting element 100 away from the second lens 400, and the second light region 620 is located on the side of the central axis of the first light-emitting element 100 closer to the second lens 400. The light energy of the first light region 610 is greater than that of the second light region 620. In other words, a larger portion of the light beam emitted by the first light-emitting element 100 is located on the side of the central axis of the first light-emitting element 100 away from the second lens 400, while a smaller portion is located on the side of the central axis of the first light-emitting element 100 closer to the second lens 400, i.e., a smaller portion is located in the region between the first light-emitting element 100 and the second light-emitting element 200. The structure of the first lens 300 is not specifically limited here, as long as the light beam emitted by the first light-emitting element 100, after passing through the first lens 300, results in the light energy of the first light region 610 being greater than that of the second light region 620.

[0036] With this configuration, the light energy in the area between the first light-emitting element 100 and the second light-emitting element 200 is reduced. Even if the light areas formed by the beams of the second light area 620 and the second light-emitting element 200 partially overlap, the light energy in the overlapping area is relatively reduced, which to some extent avoids overexposure of the supplementary light and improves the recognition of the target object.

[0037] In an optional embodiment, the light beam emitted by the second light-emitting element 200, after passing through the second lens 400, forms a third light region 630 and a fourth light region 640. The third light region 630 is located on the side of the central axis of the second light-emitting element 200 away from the first lens 300, and the fourth light region 640 is located on the side of the central axis of the second light-emitting element 200 closer to the first lens 300. The light energy of the third light region 630 is greater than that of the fourth light region 640. In other words, a larger portion of the light beam emitted by the second light-emitting element 200 is located on the side of the central axis of the second light-emitting element 200 away from the first lens 300, while a smaller portion is located on the side of the central axis of the second light-emitting element 200 closer to the first lens 300, meaning a smaller portion of the light beam is located in the region between the first light-emitting element 100 and the second light-emitting element 200. The structure of the second lens 400 is not specifically limited here, as long as the light beam emitted by the second light-emitting element 200, after passing through the second lens 400, ensures that the light energy of the third light region 630 is greater than that of the fourth light region 640.

[0038] In this embodiment, the light energy of the first light region 610 is greater than that of the second light region 620, and the light energy of the third light region 630 is greater than that of the fourth light region 640. Therefore, the light energy in the region between the first light-emitting element 100 and the second light-emitting element 200 is further reduced, while the light energy in the region where the first light-emitting element 100 and the second light-emitting element 200 are far apart from each other is further increased.

[0039] With this configuration, the light energy in the area between the first light-emitting element 100 and the second light-emitting element 200 is further reduced; that is, the sum of the light energy of the second light region 620 and the fourth light region 640 is further reduced. Even if the second light region 620 and the fourth light region 640 partially overlap, the light energy in the overlapping area is further reduced, thereby avoiding overexposure of the supplementary light to a certain extent and further improving the recognition of the target object. In this embodiment, as... Figure 2 As shown, the central axis of the first light-emitting element 100 is the first central axis 110, the central axis of the second light-emitting element 200 is the second central axis 210, the second light area 620 and the fourth light area 640 are located between the first central axis 110 and the second central axis 210, and the first light area 610 and the third light area 630 are located on the opposite side of the first central axis 110 and the second central axis 210.

[0040] In an optional embodiment, both the first lens 300 and the second lens 400 are further provided with a reflective surface 520 and a light-emitting surface 530, with the reflective surface 520 surrounding the light-incident surface 510 and the light-emitting surface 530. Specifically, as shown... Figure 1 As shown, both the first lens 300 and the second lens 400 are provided with grooves, and the groove wall surface forms a light-incident surface 510. The first light-emitting element 100 is disposed at the groove opening of the first lens 300, and the second light-emitting element 200 is disposed at the groove opening of the second lens 400.

[0041] At least one of the first lens 300 and the second lens 400 has an incident light surface 510 including a first transmission surface 511 and a second transmission surface 512, and at least one of the first lens 300 and the second lens 400 has a reflecting surface 520 including a first reflecting surface 521 and a second reflecting surface 522. The first transmission surface 511 and the second transmission surface 512 both refract the light beam, allowing the light beam to enter the interior of the first lens 300 or the second lens 400; the first reflecting surface 521 and the second reflecting surface 522 reflect the light beam; and the exit light surface 530 refracts the light beam, allowing the light beam to exit to the exterior of the first lens 300 or the second lens 400.

[0042] Optionally, the first transmission surface 511 and the first reflective surface 521 are located between the central axis of the first light-emitting element 100 and the central axis of the second light-emitting element 200, that is, the first transmission surface 511 and the first reflective surface 521 are located between the first central axis 110 and the second central axis 210, and the first reflective surface 521 connects the first transmission surface 511 and the light-emitting surface 530. The light beam that enters from the first transmission surface 511 is reflected by the first reflective surface 521 and then emitted from the light-emitting surface 530.

[0043] Specifically, since the first transmissive surface 511 and the first reflective surface 521 are located between the first central axis 110 and the second central axis 210, part of the light beam emitted by the first light-emitting element 100 enters the first lens 300 from the side of the first central axis 110 closer to the second central axis 210, that is, from... Figure 1 The light beam enters the first lens 300 from the right side of the first central axis 110. Under the action of the first transmission surface 511, the first reflection surface 521, and the light-emitting surface 530, the path and direction of the light beam change. After exiting the first lens 300, the light beam extends towards the side of the first central axis 110 away from the second central axis 210, that is, relative to... Figure 1 The first central axis 110 is shifted to the left to form the first light region 610.

[0044] Similarly, a portion of the light beam emitted by the second light-emitting element 200 enters the second lens 400 from the side of the second central axis 210 closest to the first central axis 110, that is, from... Figure 1 The light beam enters the second lens 400 from the left side of the second central axis 210. Under the action of the first transmission surface 511, the first reflection surface 521, and the light exiting surface 530, the path and direction of the light beam change. After exiting the second lens 400, the light beam extends towards the side of the second central axis 210 away from the first central axis 110, that is, relative to... Figure 1 The second central axis 210 is deflected to the right, forming the third light region 630.

[0045] With this configuration, the path and direction of the light beam can be changed through the first transmissive surface 511 and the first reflective surface 521, so that a portion of the light beam emitted by the first light-emitting element 100 forms the first light region 610, and a portion of the light beam emitted by the second light-emitting element 200 forms the third light region 630.

[0046] Optionally, the second transmission surface 512 and the second reflective surface 522 are located on the side opposite to the central axis of the first light-emitting element 100 and the central axis of the second light-emitting element 200. That is, the second transmission surface 512 and the second reflective surface 522 are located on the side opposite to the first central axis 110 and the second central axis 210. The second reflective surface 522 connects the second transmission surface 512 and the light-emitting surface 530. The light beam incident from the second transmission surface 512 is reflected by the second reflective surface 522 and emitted from the light-emitting surface 530.

[0047] Specifically, since the second transmissive surface 512 and the second reflective surface 522 are located on the side opposite to the first central axis 110 and the second central axis 210, part of the light beam emitted by the first light-emitting element 100 enters the first lens 300 from the side of the first central axis 110 away from the second central axis 210, that is, from... Figure 1 The light beam enters the first lens 300 from the left side of the first central axis 110. Under the action of the second transmission surface 512, the second reflection surface 522, and the light-emitting surface 530, the path and direction of the light beam change. After exiting the first lens 300, the light beam extends towards the side of the first central axis 110 closer to the second central axis 210, that is, relative to... Figure 1 The first central axis 110 is deflected to the right, forming the second light zone 620.

[0048] Similarly, a portion of the light beam emitted by the second light-emitting element 200 enters the second lens 400 from the side of the second central axis 210 away from the first central axis 110, that is, from... Figure 1 The light beam enters the second lens 400 from the right side of the second central axis 210. Under the action of the second transmission surface 512, the second reflection surface 522, and the light exiting surface 530, the path and direction of the light beam change. After exiting the second lens 400, the light beam extends towards the side of the second central axis 210 closer to the first central axis 110, that is, relative to... Figure 1 The second central axis 210 is shifted to the left, forming the fourth light region 640.

[0049] With this configuration, the path and direction of the light beam can be changed through the second transmission surface 512 and the second reflective surface 522, so that a portion of the light beam emitted by the first light-emitting element 100 forms the second light region 620, and a portion of the light beam emitted by the second light-emitting element 200 forms the fourth light region 640.

[0050] In this embodiment, the area of ​​the first transmission surface 511 is larger than the area of ​​the second transmission surface 512. All light beams incident through the first transmission surface 511 are reflected by the first reflective surface 521, and all light beams incident through the second transmission surface 512 are reflected by the second reflective surface 522. As a result, the light energy of the light beam incident through the first transmission surface 511 is greater than that of the light beam incident through the second transmission surface 512, thus ensuring that the light energy of the first light region 610 is greater than that of the second light region 620, and the light energy of the third light region 630 is greater than that of the fourth light region 640.

[0051] Of course, in other embodiments, the area of ​​the first transmission surface 511 can be equal to the area of ​​the second transmission surface 512. The light beam incident from the first transmission surface 511 is reflected by the first reflective surface 521 and finally enters the first light region 610. Moreover, after the light beam incident from the second transmission surface 512 is reflected by the second reflective surface 522, part of the light beam enters the first light region 610 and the other part of the light beam enters the second light region 620, so that the light energy of the first light region 610 is greater than the light energy of the second light region 620, and the light energy of the third light region 630 is greater than the light energy of the fourth light region 640.

[0052] Optionally, both the first transmission surface 511 and the second transmission surface 512 are arc-shaped surfaces, extending along a direction surrounding the central axis. For the first lens 300, the arc-shaped surface extends along a direction surrounding the first central axis 110; for the second lens 400, the arc-shaped surface extends along a direction surrounding the second central axis 210. The first transmission surface 511 and the second transmission surface 512 can be connected. Specifically, the arc-shaped surface can bulge away from the first light-emitting element 100 or the second light-emitting element 200, or it can bulge towards the first light-emitting element 100 or the second light-emitting element 200. In this embodiment, as... Figure 1 and Figure 3 As shown, the arcuate surface of the first lens 300 intersects with the plane passing through the first central axis 110, and the structure at the intersection is a straight edge; the arcuate surface of the second lens 400 intersects with the plane passing through the second central axis 210, and the structure at the intersection is a straight edge.

[0053] Of course, the first transmission surface 511 and the second transmission surface 512 can be other structures, as long as the light beam entering through the first transmission surface 511 passes through the first reflective surface 521 and the light beam entering through the second transmission surface 512 passes through the second reflective surface 522.

[0054] With this configuration, since the light beam emitted by the first light-emitting element 100 is distributed around the first central axis 110, the arcuate surface of the first lens 300 extends in the direction surrounding the first central axis 110, allowing a larger portion of the light beam emitted by the first light-emitting element 100 to enter the first transmission surface 511 and the second transmission surface 512 of the first lens 300. Similarly, since the light beam emitted by the second light-emitting element 200 is distributed around the second central axis 210, the arcuate surface of the second lens 400 extends in the direction surrounding the second central axis 210, allowing a larger portion of the light beam emitted by the second light-emitting element 200 to enter the first transmission surface 511 and the second transmission surface 512 of the second lens 400.

[0055] Optionally, both the first reflective surface 521 and the second reflective surface 522 are first curved surfaces, which convex in a direction away from the central axis. For the first lens 300, the first curved surface convexes in a direction away from the first central axis 110, and for the second lens 400, the first curved surface convexes in a direction away from the second central axis 210. Specifically, the first curved surface can be an arc surface, which can be a partially spherical surface or other curved surface structures.

[0056] With this configuration, the first curved surface acts as a converging surface for the light beam, allowing the beam to be emitted from the light-emitting surface 530 after reflection. At the same time, it concentrates the light beam towards the central axis, enabling the beam to extend from one side of the central axis to the other side and enter the corresponding light area.

[0057] In the scheme of this application, such as Figure 3 As shown, the incident surface 510 of at least one of the first lens 300 and the second lens 400 also includes a third transmission surface 513, which also refracts the light beam. The third transmission surface 513 is located between the first transmission surface 511 and the second transmission surface 512, and passes through the central axis. The third transmission surface 513 connects the first transmission surface 511 and the second transmission surface 512. The third transmission surface 513 and the exiting surface 530 are opposite to each other along the direction of the central axis, that is, the third transmission surface 513 is located at the bottom of the groove of the first lens 300 and / or the second lens 400. Whether the light beam is emitted by the first light-emitting element 100 or the second light-emitting element 200, the light beam entering through the third transmission surface 513 is directly emitted through the exiting surface 530.

[0058] Specifically, for the first lens 300, the third transmission surface 513 passes through the first central axis 110, and the third transmission surface 513 and the light-emitting surface 530 are opposite to each other along the direction of the first central axis 110; for the second lens 400, the third transmission surface 513 passes through the second central axis 210, and the third transmission surface 513 and the light-emitting surface 530 are opposite to each other along the direction of the second central axis 210.

[0059] Optionally, the light-incident surface 510 of the first lens 300 may also include a third transmission surface 513, in which case the light beam incident through the third transmission surface 513 is located within the first light region 610; alternatively, the light-incident surface 510 of the second lens 400 may also include a third transmission surface 513, in which case the light beam incident through the third transmission surface 513 is located within the third light region 630; alternatively, both the light-incident surfaces 510 of the first lens 300 and the second lens 400 may also include a third transmission surface 513.

[0060] In this embodiment, the light-incident surfaces 510 of both the first lens 300 and the second lens 400 further include a third transmission surface 513. The light beams emitted by the first light-emitting element 100 and the second light-emitting element 200 each include a first part, a second part, and a third part. The first part enters the first transmission surface 511, the second part enters the second transmission surface 512, and the third part enters the third transmission surface 513. In the light beam emitted by the first light-emitting element 100, the light beams entering the first transmission surface 511 and the third transmission surface 513 together form a first light region 610, and the light beam entering the second transmission surface 512 ultimately forms a second light region 620. In the light beam emitted by the second light-emitting element 200, the light beams entering the first transmission surface 511 and the third transmission surface 513 together form a third light region 630, and the light beam entering the second transmission surface 512 ultimately forms a fourth light region 640.

[0061] By setting up the third transmission surface 513, more light beams can enter the first light area 610 and / or the third light area 630, further increasing the light energy of the first light area 610 and / or the third light area 630, reducing the light energy of the second light area 620 and / or the fourth light area 640, and further reducing the overlap area of ​​the second light area 620 and the fourth light area 640, thus avoiding overexposure.

[0062] Optionally, the third transmission surface 513 is a second curved surface, which protrudes in a direction away from the first light-emitting element 100 and the second light-emitting element 200. Specifically, the second curved surface can be an arc surface or a curved surface of other shapes, as long as the light beam incident on the third transmission surface 513 is directly emitted from the light-emitting surface 530. In this embodiment, as shown... Figure 1 and Figure 3 As shown, the incident light surface 510 has an approximately frustum-shaped structure.

[0063] It should be noted that the third transmission surface 513 of the first lens 300 passes through the first central axis 110. That is, a portion of the third transmission surface 513 is located on one side of the first central axis 110, and the other portion is located on the other side. Therefore, some light beams enter the third transmission surface 513 from one side of the first central axis 110, while other light beams enter from the other side. Although the two light beams have different entry directions, the first lens 300, by setting a suitable structure and refractive index for the third transmission surface 513, can ensure that both light beams ultimately extend to the same side of the first central axis 110. Similarly, the second lens 400, by setting a suitable third transmission surface 513 and refractive index, can also ensure that both light beams ultimately extend to the same side of the second central axis 210.

[0064] With this configuration, the third transmission surface 513 is a curved structure, which allows light beams entering the third transmission surface 513 from both sides of the central axis to ultimately extend to the same side of the central axis, preventing the light beams entering the third transmission surface 513 from extending to both sides of the central axis, thus preventing this part of the light beam from entering the second light area 620 or the fourth light area 640 and exacerbating overexposure.

[0065] In optional embodiments, such as Figure 3 As shown, a rectangular coordinate system is established with the light-emitting center of the first light-emitting element 100 as the origin. The coordinates of any point on the first reflective surface 521 of the first lens 300 are (x, y). The first reflective surface 521 of the first lens 300 satisfies the following conditions:

[0066] x=Lcosθ+ρcosα1, and y=Lsinθ+ρsinα1.

[0067] Where x is the distance between any point and the origin along the x-axis, and y is the distance between any point and the origin along the y-axis. The x-axis direction is consistent with the direction from the first light-emitting element 100 to the second light-emitting element 200, and the y-axis direction is consistent with the direction of the first central axis 110. If a polar coordinate system is established with the light-emitting center of the first light-emitting element 100 as the pole, the coordinates of any point on the first reflective surface 521 of the first lens 300 are (ρ, θ), where ρ is the distance between any point and the origin, and θ is the angle between the first direction and the x-axis. The first direction is the direction from the origin to the arbitrary point.

[0068] like Figure 2 As shown, L is the maximum size of the supplementary lighting blind zone along the direction of the first central axis 110. The supplementary lighting blind zone refers to the area not illuminated by the light beams emitted by the first light-emitting element 100 and the second light-emitting element 200, and the supplementary lighting blind zone is located between the first light-emitting element 100 and the second light-emitting element 200; α1 is the angle between the boundary of the second light area 620 and the first central axis 110. It should be noted that L, α1, and ρ can all be expressed as functions of θ.

[0069] With this configuration, the first reflective surface 521 of the first lens 300 satisfies the above conditions, and can reflect all the light beams incident on the first transmission surface 511 to the side of the first central axis 110 facing away from the second central axis 210, thereby forming the first light area 610.

[0070] Optionally, such as Figure 3 As shown, for the first reflective surface 521 of the first lens 300, α1 and θ satisfy the following relationship:

[0071]

[0072] Where I1 is the polarization angle. The light intensity at that time is given by the polarization angle, which is the angle between the first connecting line and the central axis. Here, the central axis refers to the first central axis 110. The first connecting line is the line connecting any position within the first plane 900 to the light-emitting center of the first light-emitting element 100. The first plane 900 is the plane containing the central axis of the first light-emitting element 100 and the central axis of the second light-emitting element 200, which is the plane containing the first central axis 110 and the second central axis 210. The polarization angle of the first position within the first plane 900 is greater than zero, and the polarization angle of the second position within the first plane 900 is less than zero. The first position is located on the side of the central axis of the first light-emitting element 100 closer to the second lens 400, which is located within the second light area 620. The second position is located on the side of the central axis of the first light-emitting element 100 away from the second lens 400, which is located within the first light area 610.

[0073] like Figure 3 As shown, the first transmission surface 511 has a first endpoint and a second endpoint within the first plane 900, θ M The angle formed by the second and third lines is the angle between the origin and the first endpoint. The second line is the line connecting the origin and the second endpoint.

[0074] Specifically, such as Figure 2 As shown, L and α1 satisfy the following relationship: tanα1=D / 2L. Where D is the distance between the light-emitting center of the first light-emitting element 100 and the light-emitting center of the second light-emitting element 200.

[0075] Furthermore, the light intensity distribution of the first light-emitting element 100 adopts a Gaussian distribution, satisfying the following conditions: Where I0 is the light intensity at the center of the first light-emitting element 100 and the second light-emitting element 200, c is the polarization angle when the light intensity I1 is 1 / e, and e is the natural constant.

[0076] Based on the relationship between L and α1 and the light intensity distribution conditions of the first light-emitting element 100, it can be concluded that, Figure 4 As shown, I1 and The following relationship must be satisfied:

[0077]

[0078] With this configuration, the first reflective surface 521 of the first lens 300 satisfies the above-mentioned conditions, and the light intensity of the first light-emitting element 100 can achieve a special distribution, so that the maximum light intensity of the first light-emitting element 100 is located on the side of the first central axis 110 facing away from the second central axis 210; moreover, the light intensity distribution in the second light region 620 is as follows: Figure 4 The linear function in the light intensity distribution effectively reduces the light intensity in the second light zone 620 compared to the quadratic function, thus reducing the overlapping area and effectively avoiding overexposure.

[0079] In an optional embodiment, a rectangular coordinate system is established with the light-emitting center of the second light-emitting element 200 as the origin. The x-axis direction is the direction from the second light-emitting element 200 to the first light-emitting element 100, and the y-axis direction is consistent with the direction of the second central axis 210. Then, the first reflective surface 521 of the second lens 400 also satisfies the above conditions: x = Lcosθ + ρcosα2, and y = Lsinθ + ρsinα2. At this time, α2 is the angle between the boundary of the fourth light region 640 and the second central axis 210, and the meanings of the other symbols are the same as above. It should be noted that L, α2, and ρ can all be expressed as functions of θ.

[0080] In this embodiment, α1 = α2, and the refractive index n1 of the first lens 300 is the same as the refractive index n2 of the second lens 400. According to the law of reflection of light, n1sinα1 = n2sinα2.

[0081] With this configuration, the first reflective surface 521 of the second lens 400 satisfies the above conditions, and can reflect all the light beams incident from the first transmission surface 511 to the side of the second central axis 210 that is away from the first central axis 110, thereby forming the third light area 630.

[0082] Optionally, for the first reflective surface 521 of the second lens 400, α2 and θ also satisfy the following relationship:

[0083]

[0084] Where I2 is the polarization angle. The light intensity at this time is θ, and the polarization angle is the angle between the first connecting line and the second central axis 210. At this time, the first connecting line is the line connecting any position within the first plane 900 to the light-emitting center of the first light-emitting element 100. The first plane 900 is the plane containing the first central axis 110 and the second central axis 210. The polarization angle at the third position within the first plane 900 is greater than zero, and the polarization angle at the fourth position within the first plane 900 is less than zero. The third position is located on the side of the second central axis 210 away from the first lens 300, that is, within the third light region 630. The fourth position is located on the side of the second central axis 210 closer to the first lens 300, that is, within the fourth light region 640. M The meaning is the same as above.

[0085] L and α2 satisfy the following relationship: tanα2=D / 2L, where D is the distance between the light-emitting center of the first light-emitting element 100 and the light-emitting center of the second light-emitting element 200, and is also the distance between the first central axis 110 and the second central axis 210.

[0086] Furthermore, the light intensity distribution of the second light-emitting element 200 adopts a Gaussian distribution, satisfying the following conditions: Where I0 is the light intensity at the center of the first light-emitting element 100 and the second light-emitting element 200, c is the polarization angle when the light intensity I2 is 1 / e, and e is the natural constant.

[0087] Based on the relationship between L and α2 and the light intensity distribution conditions of the second light-emitting element 200, it can be concluded that, Figure 5 As shown, I2 and The following relationship must be satisfied:

[0088]

[0089] With this configuration, the first reflective surface 521 of the second lens 400 satisfies the corresponding conditions mentioned above, enabling the light intensity of the second light-emitting element 200 to achieve a special distribution, so that the maximum light intensity of the second light-emitting element 200 is located on the side of the second central axis 210 facing away from the first central axis 110; moreover, the light intensity distribution within the fourth light region 640 is as follows: Figure 5 The linear function in the light intensity distribution effectively reduces the light intensity in the fourth light zone 640 compared to the quadratic function distribution, thereby reducing the overlapping area and effectively avoiding overexposure.

[0090] Based on the conditions I1 and I2 above, it can be concluded that... At that time, I1 = I2 = I0 / 2.

[0091] In this embodiment, as Figure 2 As shown, the second light region 620 and the fourth light region 640 have no overlapping area, which directly avoids overexposure of the target object between the first light-emitting element 100 and the second light-emitting element 200.

[0092] In an optional embodiment, the first transmission surface 511 intersects with the first plane 900, and the structure at the intersection is a straight edge, such as... Figure 3 As shown, for the first lens 300, the angle between its straight edge and the first central axis 110 is γ; for the second lens 400, the angle between its straight edge and the second central axis 210 is γ; the lowest point of the first reflective surface 521 is located on the x-axis; and L satisfies the following condition:

[0093]

[0094] Furthermore, ρ satisfies the following condition:

[0095]

[0096] Where ρ′ is the derivative of ρ, and α1=α2=arctan(D / 2L). Based on the above conditions, the relationship between α1 and θ, and the relationship between α2 and θ can be derived.

[0097] Optionally, the tilt of the first reflective surface 521 relative to the central axis is less than the tilt of the second reflective surface 522 relative to the central axis. For the first lens 300, the tilt of the first reflective surface 521 relative to the first central axis 110 is less than the tilt of the second reflective surface 522 relative to the first central axis 110; for the second lens 400, the tilt of the first reflective surface 521 relative to the second central axis 210 is less than the tilt of the second reflective surface 522 relative to the second central axis 210.

[0098] With this configuration, the first reflective surface 521 has a stronger reflective effect, while the second reflective surface 522 has a relatively weaker reflective effect, thereby ensuring that the light intensity distribution of the first light region 610 and the second light region 620 satisfies the aforementioned I1 and Similarly, to achieve the light intensity distribution of the third optical region 630 and the fourth optical region 640 satisfying the above I2 and The relational expression.

[0099] In the scheme of this application, the plane containing the central axis of the first light-emitting element 100 and the central axis of the second light-emitting element 200 is the first plane 900, which is the plane containing the first central axis 110 and the second central axis 210. The two sides of the first plane 900 are the first side and the second side, respectively. Figure 6 As shown, when the supplementary lighting system is applied to a camera device, the central axis of the first light-emitting element 100 and the second light-emitting element 200 usually forms an angle with the horizontal plane, that is, the first light-emitting element 100 and the second light-emitting element 200 are tilted. In this case, the target object can be divided into target object A and target object B. Target object A is located on the second side and target object B is located on the first side. Target object A is closer to the supplementary lighting system and target object B is farther away from the supplementary lighting system. Therefore, more light energy is irradiated to target object A and less light energy is irradiated to target object B, which makes target object A prone to overexposure.

[0100] To solve the above problems, the light beam emitted by the first light-emitting element 100 is processed by the first lens 300 to form a first weak light area and a first strong light area. The first strong light area is located on the first side, and the first weak light area is located on the second side. The light energy of the first strong light area is greater than that of the first weak light area, indicating that more of the light beam emitted by the first light-emitting element 100 is located on the first side, and less of the light beam is located on the second side. As a result, the light energy irradiating the target object B increases, and the light energy irradiating the target object A decreases.

[0101] And / or, the light beam emitted by the second light-emitting element 200, after passing through the second lens 400, forms a second weak light area and a second strong light area. The second strong light area is located on the first side, and the second weak light area is located on the second side, with the light energy of the second strong light area being greater than that of the second weak light area. This indicates that the light beam emitted by the second light-emitting element 200 is more concentrated on the first side and less concentrated on the second side, resulting in increased light energy illuminating target B and decreased light energy illuminating target A.

[0102] Optionally, the light energy of the first strong light region may be greater than that of the first weak light region, or the light energy of the second strong light region may be greater than that of the second weak light region, or the light energy of the first strong light region may be greater than that of the first weak light region, and the light energy of the second strong light region may be greater than that of the second weak light region. In short, regardless of the situation, there is more light energy on the first side and less light energy on the second side, resulting in less light energy reaching nearby targets and more light energy reaching distant targets.

[0103] This setting avoids overexposure of nearby objects and increases the brightness of distant objects, resulting in a more uniform lighting effect.

[0104] In this embodiment, the light energy of the first strong light region is greater than that of the first weak light region, and the light energy of the second strong light region is greater than that of the second weak light region. The first strong light region and the second strong light region together form a strong light region 710, and the first weak light region and the second weak light region together form a weak light region 720.

[0105] like Figure 7 shown Figure 6 The structure of the first lens 300 under the viewing angle. In an optional embodiment, the light-incident surface 510 of at least one of the first lens 300 and the second lens 400 further includes a fourth transmission surface 514 and a fifth transmission surface 515, and the reflective surface 520 of at least one of the first lens 300 and the second lens 400 further includes a third reflective surface 523 and a fourth reflective surface 524, wherein the fourth transmission surface 514 and the fifth transmission surface 515 also refract the light beam, for allowing the light beam to enter the interior of the first lens 300 or the interior of the second lens 400; the third reflective surface 523 and the fourth reflective surface 524 reflect the light beam.

[0106] The fourth transmission surface 514 and the third reflective surface 523 are located on the second side, and the fifth transmission surface 515 and the fourth reflective surface 524 are located on the first side. The first transmission surface 511, the fourth transmission surface 514, the second transmission surface 512 and the fifth transmission surface 515 are connected in sequence along the direction surrounding the central axis. The third transmission surface 513 is connected to the first transmission surface 511, the fourth transmission surface 514, the second transmission surface 512 and the fifth transmission surface 515 respectively. The first reflective surface 521, the third reflective surface 523, the second reflective surface 522 and the fourth reflective surface 524 are connected in sequence along the direction surrounding the central axis.

[0107] For the first lens 300, the first transmission surface 511, the fourth transmission surface 514, the second transmission surface 512, and the fifth transmission surface 515 are connected sequentially along the direction surrounding the first central axis 110, and the first reflective surface 521, the third reflective surface 523, the second reflective surface 522, and the fourth reflective surface 524 are connected sequentially along the direction surrounding the first central axis 110; for the second lens 400, the first transmission surface 511, the fourth transmission surface 514, the second transmission surface 512, and the fifth transmission surface 515 are connected sequentially along the direction surrounding the second central axis 210, and the first reflective surface 521, the third reflective surface 523, the second reflective surface 522, and the fourth reflective surface 524 are connected sequentially along the direction surrounding the second central axis 210.

[0108] In summary, the light beam entering through the fourth transmission surface 514 is reflected by the third reflective surface 523 and then emitted through the light-emitting surface 530, and the light beam entering through the fifth transmission surface 515 is reflected by the fourth reflective surface 524 and then emitted through the light-emitting surface 530.

[0109] Specifically, since the fourth transmission surface 514 is located on the second side, a portion of the light beam emitted by at least one of the first light-emitting element 100 and the second light-emitting element 200 enters the light-receiving surface 510 from the second side. Under the action of the fourth transmission surface 514 and the third reflective surface 523, the path and direction of the light beam change, and the light beam extends towards the first side after exiting, forming a first strong light area and / or a second strong light area. Similarly, since the fifth transmission surface 515 is located on the first side, a portion of the light beam emitted by at least one of the first light-emitting element 100 and the second light-emitting element 200 enters the light-receiving surface 510 from the first side. Under the action of the fifth transmission surface 515 and the fourth reflective surface 524, the path and direction of the light beam change, and the light beam extends towards the second side after exiting, forming a first weak light area and / or a second weak light area.

[0110] With this configuration, the path and direction of the light beam can be changed through the fourth transmission surface 514 and the third reflective surface 523, thereby forming a first strong light area and / or a second strong light area; the path and direction of the light beam can also be changed through the fifth transmission surface 515 and the fourth reflective surface 524, thereby forming a first weak light area and / or a second weak light area.

[0111] Optionally, the area of ​​the fourth transmission surface 514 is larger than the area of ​​the fifth transmission surface 515, and all light beams incident through the fourth transmission surface 514 are reflected by the third reflective surface 523, and all light beams incident through the fifth transmission surface 515 are reflected by the fourth reflective surface 524. In this way, the light energy of the light beam incident through the fourth transmission surface 514 is greater than the light energy of the light beam incident through the fifth transmission surface 515, thus achieving a greater light energy on the first side than on the second side.

[0112] In this embodiment, the fourth transmission surface 514 has the same structure as the first transmission surface 511, the fifth transmission surface 515 has the same structure as the second transmission surface 512, the third reflective surface 523 has the same structure as the first reflective surface 521, and the fourth reflective surface 524 has the same structure as the second reflective surface 522.

[0113] Optionally, the light beam incident through the third transmission surface 513 may enter the first light region 610 and / or the third light region 630 simultaneously with the first high-intensity light region and / or the second high-intensity light region. Specifically, Figure 6 The structure of the third transmission surface 513 under the viewpoint and Figure 1 The structure of the third transmission surface 513 is the same from the perspective of viewing angle.

[0114] This not only reduces the overlap between the second light zone 620 and the fourth light zone 640, preventing overexposure of the target object between the first light-emitting element 100 and the second light-emitting element 200, but also prevents overexposure of nearby targets in other locations, thereby increasing the brightness of distant targets.

[0115] Optionally, such as Figure 1 As shown, the first lens 300 and the second lens 400 are symmetrical about a preset symmetry plane, which is located between the first light-emitting element 100 and the second light-emitting element 200.

[0116] With this setup, only one type of lens needs to be manufactured. By placing the lens in different positions, the first lens 300 and the second lens 400 can be formed, reducing manufacturing costs. Moreover, the light area formed by the light beam emitted by the first light-emitting element 100 and the light area formed by the light beam emitted by the second light-emitting element 200 are also symmetrical about the preset symmetry plane, so that the supplementary lighting effect on both sides of the preset symmetry plane is the same, and the supplementary lighting is more uniform.

[0117] This application also discloses a monitoring system, such as... Figure 1As shown, the disclosed monitoring system includes two light-emitting components and a lens assembly. The two light-emitting components form the supplementary lighting system described above, and are symmetrically arranged on both sides of the lens assembly 800. The lens assembly 800 is configured such that its optical axis 810 forms a first angle β with the horizontal plane. The lens assembly 800 is used to generate a first image with a first depth of field in response to the supplementary lighting rays from the two light-emitting elements. The preset symmetry plane described above is coplanar with the optical axis 810 of the lens assembly 800.

[0118] The light-emitting assembly includes a light-emitting element and a lens. The light-emitting element is configured such that its central axis forms a first angle β with the horizontal plane, such that the optical axis 810 is coplanar with the central axes of the two light-emitting assemblies. In this embodiment, one light-emitting assembly includes a first light-emitting element 100 and a first lens 300, and the other light-emitting assembly includes a second light-emitting element 200 and a second lens 400. The first central axis 110 of the first light-emitting element 100, the optical axis 810 of the lens assembly 800, and the second central axis 210 of the second light-emitting element 200 are parallel. Moreover, the angles between the first central axis 110 of the first light-emitting element 100, the optical axis 810 of the lens assembly 800, and the second central axis 210 of the second light-emitting element 200 and the horizontal plane are respectively the first angle β. Figure 6 As shown.

[0119] The lens includes an incident light surface 510, a reflective surface 520, and an exit light surface 530. The slope of the first reflective surface 521, which is closer to the lens assembly, in the reflective surface 520 is greater than the slope of the second reflective surface 522, which is other than the first reflective surface 521, in the reflective surface 520. This is to limit the supplementary light to the light entering the light source from the incident light surface 510, which can be reflected by the first reflective surface 521 and the second reflective surface 522 and then exited from the exit light surface 530. The intensity of the supplementary light increases along the first depth of field range.

[0120] Optionally, the first reflective surface 521 can be disposed on the side of the central axis of the light-emitting element closer to the lens assembly 800, and the second reflective surface 522 can be disposed on the side of the central axis of the light-emitting element away from the lens assembly 800. In this case, the first depth of field range is located on the first plane 900. By relying on the first reflective surface 521 and the second reflective surface 522, more supplementary light rays fall on the side of the central axis of the light-emitting element away from the lens assembly 800, and less supplementary light rays fall on the side of the central axis of the light-emitting element closer to the lens assembly 800, thereby reducing the light intensity near the lens assembly 800 and increasing the light intensity far from the lens assembly 800. Alternatively, the first reflective surface 521 and the second reflective surface 522 can also... The first reflective surface 521 is disposed on the first side of the first plane 900, and the second reflective surface 522 is disposed on the second side of the first plane 900. In this case, the first depth of field range is located in a plane perpendicular to the first plane 900. By relying on the first reflective surface 521 and the second reflective surface 522, more of the fill light falls into the second side and less of the fill light falls into the first side, thereby reducing the light intensity near the lens assembly 800 and increasing the light intensity far from the lens assembly 800.

[0121] In this embodiment, because the slope of the first reflective surface 521 is greater than the slope of the second reflective surface 522, the intensity of the supplementary light increases along the first depth of field. The first depth of field is the distance range from near objects that the lens assembly 800 can clearly capture to distant objects that it can clearly capture. The increase in the intensity of the supplementary light along the first depth of field indicates that the supplementary light becomes stronger from a position closer to the lens assembly 800 to a position farther away. Therefore, the supplementary light is weaker at positions closer to the lens assembly 800 and stronger at positions farther away. Consequently, the light intensity decreases at positions closer to the lens assembly 800 and increases at positions farther away, thereby avoiding overexposure of near objects and improving the recognition of the target object.

[0122] In an optional embodiment, the supplementary lighting rays exhibit a Gaussian distribution in a first plane 900, which is the plane containing the optical axis 810 of the lens assembly 800 and the central axes of the two light-emitting components. Alternatively, the supplementary lighting rays can also exhibit a Gaussian distribution in a plane perpendicular to the first plane 900. Thus, the Gaussian distribution of the supplementary lighting rays indicates that the light intensity increases along the first depth of field, avoiding overexposure issues in the near-field areas of the lens assembly 800.

[0123] In this embodiment, the supplementary light rays of the first light-emitting element 100 are Gaussian distributed on the first plane 900, satisfying the following conditions: Where I0 is the light intensity at the optical axis 810 of the lens assembly 800, c is the polarization angle when the light intensity I1 is 1 / e, the supplementary light rays of the first light-emitting element 100 form the first supplementary light range, the polarization angle refers to the angle of a certain position within the first supplementary light range relative to the first central axis 110 of the first light-emitting element 100, and e is the natural constant; the supplementary light rays of the second light-emitting element 200 also exhibit a Gaussian distribution on the first plane 900, satisfying the following conditions: Where I0 is the light intensity at the optical axis 810 of the lens assembly 800, c is the polarization angle when the light intensity I2 is 1 / e, the supplementary light rays of the second light-emitting element 200 form the second supplementary light range, the polarization angle here refers to the angle of a certain position in the second supplementary light range relative to the second central axis 210 of the second light-emitting element 200, and e is a natural constant.

[0124] In optional embodiments, such as Figure 2 As shown, the slope of the second reflective surface 522 is configured such that the angle α1 corresponding to the point where the light intensity of the light emitted by the light-emitting element through the second reflective surface 522 is 0 is constrained by the maximum dimension L of the fill light blind zone along the optical axis 810 and the distance d between the light-emitting element and the lens assembly 800. The fill light blind zone is located between the two light-emitting elements. The fill light blind zone refers to the area where neither of the fill light rays from the two light-emitting elements falls. Specifically, the larger α1 is, the closer the fill light is to the lens assembly 800, the worse the effect of avoiding near overexposure; while the smaller α1 is, the farther the fill light is from the lens assembly 800, the better the effect of avoiding near overexposure. Therefore, α1 is constrained by L and d. By setting an appropriate fill light blind zone and setting the distance between the light-emitting element and the lens assembly 800, the required α1 can be obtained to achieve a better effect of avoiding overexposure.

[0125] In an optional embodiment, the functional constraint relationship between the angle α1 corresponding to the light intensity of 0, the maximum size L of the supplementary lighting blind zone along the optical axis 810, and the distance d between the light-emitting element and the lens assembly 800 satisfies: α1 = arctan(d / L). Thus, α1, d, and L have a clear functional relationship, and by setting appropriate d and L, the accurate angle α1 can be obtained.

[0126] In this embodiment, d = D / 2, that is, the distance from the first light-emitting element 100 to the lens assembly 800 is equal to the distance from the second light-emitting element 200 to the lens assembly 800. In this case, L is the distance between the point where the light intensity of the first light-emitting element 100 is 0 and the point where the light intensity of the second light-emitting element 200 is 0, and the lens assembly 800.

[0127] In an optional embodiment, a rectangular coordinate system is established with the light-emitting center of the light-emitting element as the origin. The coordinates of any point on the first reflective surface 521 are (x, y). The first reflective surface 521 satisfies the following conditions: x = Lcosθ + ρcosα1 and y = Lsinθ + ρsinα1.

[0128] Where x is the distance between any point and the origin along the x-axis, y is the distance between any point and the origin along the y-axis, the x-axis is aligned with the direction from the light-emitting element to the lens assembly 800, and the y-axis is aligned with the direction of the central axis of the light-emitting element. If a polar coordinate system is established with the light-emitting center of the light-emitting element as the pole, the coordinates of any point on the first reflective surface 521 are (ρ, θ), where ρ is the distance between any point and the origin, θ is the angle between the first direction and the x-axis, and the first direction is the direction from the origin to the arbitrary point. L is the maximum size of the supplementary lighting blind zone along the direction of the optical axis 810, and the supplementary lighting blind zone is located between the two light-emitting components; α1 is the angle corresponding to the point where the light intensity of the light emitted by the light-emitting element through the second reflective surface 522 is 0. It should be noted that L, α1, and ρ can all be expressed as functions of θ.

[0129] In an optional embodiment, α1 and θ satisfy the following relationship:

[0130]

[0131] Where I1 is the polarization angle. The light intensity at that time is given by the polarization angle, which is the angle between the first connecting line and the central axis. The first connecting line is the line connecting any position within the first plane 900 to the light-emitting center of the light-emitting element. The first plane 900 is the plane containing the optical axis 810 of the lens assembly 800 and the central axis of the light-emitting element. The polarization angle of the first position within the first plane 900 is greater than zero, and the polarization angle of the second position within the first plane 900 is less than zero. The first position is located on the side of the central axis of the light-emitting element closer to the lens assembly 800, which is located within the second light area 620 mentioned above. The second position is located on the side of the central axis of the light-emitting element away from the lens assembly 800, which is located within the first light area 610 mentioned above.

[0132] The incident surface has a first endpoint and a second endpoint within the first plane 90°, θ MThe angle formed by the second and third lines is the angle between the origin and the first endpoint. The second line is the line connecting the origin and the second endpoint.

[0133] In an optional embodiment, the light intensity distribution of the light emitted from the light-emitting element after passing through the lens at the first plane 900 satisfies the function:

[0134]

[0135] Where I0 is the light intensity at optical axis 810, c is the polarization angle when light intensity I1 is 1 / e, and e is the natural constant.

[0136] With this configuration, the first reflective surface 521 of the first light-emitting element 100 meets the above conditions, which is beneficial for the presentation of supplementary light intensity. Figure 4 The image shown allows the fill light from the first light-emitting element 100 to naturally exhibit a Gaussian distribution, ultimately preventing overexposure of the close-range fill light from the lens assembly 800. Similarly, the first reflective surface 521 of the second light-emitting element 200 satisfies the corresponding conditions, which is beneficial for the presentation of its fill light intensity. Figure 5 The image shown makes the fill light of the second light-emitting element 200 naturally exhibit a Gaussian distribution, ultimately achieving the effect of avoiding overexposure of the close-range fill light of the lens assembly 800.

[0137] In this scheme, the first depth of field range refers to the range from where the supplementary light intensity is 0 to where the supplementary light intensity is maximum. For the first supplementary light range of the first light-emitting element 100, refer to... Figure 4 The first depth of field range is the range between the position corresponding to the polarization angle α1 and the position corresponding to the polarization angle -α1 within the first supplementary lighting range; for the second supplementary lighting range of the second light-emitting element 200, refer to Figure 5 The first depth of field range refers to the range between the angle corresponding to the polarization angle -α2 and the position corresponding to the polarization angle α2 within the second supplementary lighting range. Here, α1 = α2. The position corresponding to the point where the supplementary light intensity is 0 is closer to the lens assembly 800, while the position corresponding to the point where the supplementary light intensity is maximum is farther from the lens assembly 800. Therefore, the light intensity decreases at positions closer to the lens assembly 800, and increases at positions farther from the lens assembly 800, thereby avoiding overexposure at close range and improving the recognition of the target object.

[0138] In the scheme of this application, the light-incident surface 510 of the lens includes a first transmission surface 511 and a second transmission surface 512. The first transmission surface 511 and the first reflective surface 521 are located on the side of the central axis of the light-emitting element close to the lens assembly 800, and the second transmission surface 512 and the second reflective surface 522 are located on the side of the central axis of the light-emitting element away from the lens assembly 800. The first reflective surface 521 connects the first transmission surface 511 and the light-emitting surface 530, and the second reflective surface 522 connects the second transmission surface 512 and the light-emitting surface 530. Light rays entering through the first transmission surface 511 are reflected by the first reflective surface 521 and then emitted through the light-emitting surface 530. Light rays entering through the second transmission surface 512 are reflected by the second reflective surface 522 and then emitted through the light-emitting surface 530.

[0139] Specifically, the first transmission surface 511 and the first reflection surface 521 of the first lens 300 are located on the side of the first central axis 110 of the first light-emitting element 100 close to the lens assembly 800, and the second transmission surface 512 and the second reflection surface 522 of the first lens 300 are located on the side of the first central axis 110 of the first light-emitting element 100 away from the lens assembly 800; the first transmission surface 511 and the first reflection surface 521 of the second lens 400 are located on the side of the second central axis 210 of the second light-emitting element 200 close to the lens assembly 800, and the second transmission surface 512 and the second reflection surface 522 of the second lens 400 are located on the side of the second central axis 210 of the second light-emitting element 200 away from the lens assembly 800.

[0140] Thus, by relying on the first transmissive surface 511 and the first reflective surface 521, the path and direction of the light are changed, so that part of the light beam emitted by the light-emitting element is focused on the side of the light-emitting element away from the lens assembly 800; by relying on the second transmissive surface 512 and the second reflective surface 522, the path and direction of the light are changed, so that part of the light beam emitted by the light-emitting element is focused on the side of the light-emitting element closer to the lens assembly 800, which is conducive to the light intensity presenting a Gaussian distribution.

[0141] In an optional embodiment, the light-incident surface 510 of the lens further includes a third transmission surface 513. The third transmission surface 513 is disposed between the first transmission surface 511 and the second transmission surface 512, and passes through the central axis of the light-emitting element. The third transmission surface 513 connects the first transmission surface 511 and the second transmission surface 512, and the third transmission surface 513 and the light-emitting surface 530 are opposite to each other along the direction of the central axis. That is, the third transmission surface 513 is located on the groove wall of the recess of the lens. The light entering the light-emitting element through the third transmission surface 513 is directly emitted from the light-emitting surface 530, and the light passing through the third transmission surface 513 is located on the side of the central axis of the light-emitting element away from the lens assembly 800.

[0142] In optional embodiments, such as Figure 6As shown, the plane containing the central axis of the light-emitting element and the optical axis of the lens assembly is the first plane 900. The angle between the first plane 900 and the horizontal plane is the first angle β. The two sides of the first plane 900 are the first side and the second side, respectively. The light emitted by the light-emitting element forms a weak light area and a strong light area after passing through the lens. The strong light area is located on the first side, and the weak light area is located on the second side. The light energy of the strong light area is greater than that of the weak light area. The weak light area is closer to the lens assembly 800, and the strong light area is farther away from the lens assembly 800. Therefore, in the direction perpendicular to the first plane 900, the supplementary light at the position closer to the lens assembly 800 is weaker, and the supplementary light at the position farther away from the lens assembly 800 is stronger. This effectively avoids overexposure of nearby targets and increases the brightness of distant targets, making the supplementary lighting more uniform.

[0143] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A monitoring system, characterized in that, include: Two light-emitting components and a lens assembly (800), wherein the two light-emitting components are symmetrically arranged on both sides of the lens assembly (800); The lens assembly (800) is configured such that the optical axis (810) forms a first angle (β) with the horizontal plane, and the lens assembly (800) is used to generate a first image having a first depth of field in response to the supplementary light from the two light-emitting elements; The light-emitting assembly includes a light-emitting element and a lens. The light-emitting element is configured such that the central axis of the light-emitting element forms the first angle (β) with the horizontal plane, so that the optical axis (810) is coplanar with the central axes of the two light-emitting assemblies. The lens includes an incident surface (510), a reflective surface (520), and an exit surface (530). The slope of the first reflective surface (521) of the reflective surface (520) near the lens assembly (800) is greater than the slope of the second reflective surface (522) of the reflective surface (520) other than the first reflective surface (521), so that the supplementary light is defined as light entering the light-emitting element from the incident surface (510) can be reflected by the first reflective surface (521) and the second reflective surface (522) and exited from the exit surface (530), and the light intensity of the supplementary light increases along the first depth of field range. A rectangular coordinate system is established with the light-emitting center of the light-emitting element as the origin. The coordinates of any point on the first reflective surface (521) are (x, y). The first reflective surface (521) satisfies the following conditions: x=Lcosθ+ρcosα1, and y=Lsinθ+ρsinα1; Where x is the distance between the arbitrary point and the origin along the x-axis, y is the distance between the arbitrary point and the origin along the y-axis, the x-axis direction is consistent with the direction from the light-emitting element to the lens assembly (800), and the y-axis direction is consistent with the direction of the central axis of the light-emitting element. ρ is the distance between the arbitrary point and the origin, θ is the angle between the first direction and the x-axis, and the first direction is the direction from the origin to the arbitrary point; L is the maximum size of the fill light blind zone along the direction of the optical axis (810), and the fill light blind zone is located between the two light-emitting components; α1 is the angle corresponding to the point where the light intensity of the light emitted by the light-emitting element through the second reflective surface (522) is 0.

2. The monitoring system according to claim 1, characterized in that, The supplementary light rays exhibit a Gaussian distribution in the first plane (900), which is the plane containing the optical axis (810) of the lens assembly (800) and the central axis of the two light-emitting components.

3. The monitoring system according to claim 1, characterized in that, The slope of the second reflective surface (522) is configured such that the angle α1 corresponding to the point where the light intensity of the light emitted by the light-emitting element via the second reflective surface (522) is 0 is constrained by the maximum dimension L of the fill light blind zone along the direction of the optical axis (810) and the distance d between the light-emitting element and the lens assembly (800), the fill light blind zone being located between the two light-emitting components.

4. The monitoring system according to claim 3, characterized in that, The functional constraint relationship between the angle α1 corresponding to the light intensity of 0, the maximum size L” of the supplementary light blind zone along the direction of the optical axis (810), and the distance d between the light-emitting element and the lens assembly (800) satisfies: α1=arctan(d / L).

5. The monitoring system according to claim 4, characterized in that, α1 and θ satisfy the following relationship: ， Wherein, I1 is the light intensity when the polarization angle is φ, the polarization angle is the angle between the first connecting line and the central axis, the first connecting line is the line connecting any position in the first plane (900) and the light-emitting center of the light-emitting element, the first plane (900) is the plane where the optical axis (810) of the lens assembly (800) and the central axis of the light-emitting element are located, and the polarization angle of the first position in the first plane (900) is greater than zero, the polarization angle of the second position in the first plane (900) is less than zero, the first position is located on the side of the central axis of the light-emitting element closer to the lens assembly (800), and the second position is located on the side of the central axis of the light-emitting element away from the lens assembly (800); The light-incident surface (510) has a first endpoint and a second endpoint within the first plane (900). The angle formed by the second line and the third line is the angle between the origin and the first endpoint. The second line is the line connecting the origin and the second endpoint.

6. The monitoring system according to claim 5, characterized in that, The light intensity distribution of the light emitted by the light-emitting element after passing through the lens on the first plane (900) satisfies the function: ， Where I0 is the light intensity at the optical axis (810), c is the polarization angle when the light intensity I1 is 1 / e, and e is the natural constant.

7. The monitoring system according to claim 1, characterized in that, The light-incident surface (510) of the lens includes a first transmission surface (511) and a second transmission surface (512). The first transmission surface (511) and the first reflective surface (521) are located on the side of the central axis of the light-emitting element close to the lens assembly (800), and the second transmission surface (512) and the second reflective surface (522) are located on the side of the central axis of the light-emitting element away from the lens assembly (800). The first reflective surface (521) connects the first transmission surface (511) and the light-emitting surface (530), and the second reflective surface (522) connects the second transmission surface (512) and the light-emitting surface (530). Light rays entering through the first transmission surface (511) are reflected by the first reflective surface (521) and then emitted through the light-emitting surface (530). Light rays entering through the second transmission surface (512) are reflected by the second reflective surface (522) and then emitted through the light-emitting surface (530).

8. The monitoring system according to claim 7, characterized in that, The light-incident surface of the lens also includes a third transmission surface (513), which is disposed between the first transmission surface (511) and the second transmission surface (512). The third transmission surface (513) passes through the central axis of the light-emitting element. The third transmission surface (513) connects the first transmission surface (511) and the second transmission surface (512). The third transmission surface (513) and the light-emitting surface (530) are opposite to each other along the direction of the central axis. The light rays entering through the third transmission surface (513) are emitted directly from the light-emitting surface (530), and the light rays passing through the third transmission surface (513) are located on the side of the central axis of the light-emitting element away from the lens assembly (800).

9. The monitoring system according to claim 1, characterized in that, The plane containing the central axis of the light-emitting element and the optical axis (810) of the lens assembly (800) is the first plane (900), the angle between the first plane (900) and the horizontal plane is the first angle (β), and the two sides of the first plane (900) are the first side and the second side, respectively. The light emitted by the light-emitting element is processed by the lens to form a weak light area (720) and a strong light area (710). The strong light area (710) is located on the first side, and the weak light area (720) is located on the second side. The light energy of the strong light area (710) is greater than that of the weak light area (720).

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