Multi-emission type large-angle emission lens
By designing a multi-shot, large-angle emitting lens and combining a central lens with edge lenses, the light coverage area is expanded, solving the problem of insufficient sensor sensitivity when detecting at large angles and achieving efficient light distribution and detection effects.
Patent Information
- Application Number
- CN202511373891.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-24
- Publication Date
- 2025-11-11
AI Technical Summary
Existing emission lenses cannot effectively cover a wide angle range, resulting in insufficient sensitivity of the sensor when detecting targets over a large area.
It employs a multi-shot, large-angle emission lens, including a central lens and edge lenses. The inner surface of the lens has a negative curvature in the Y direction, while the outer surface has a positive curvature in the Y direction. By combining lenses, the light coverage area is expanded, and the light density is increased.
It increases the light coverage area, improves detection sensitivity, avoids the problem of insufficient light source energy, achieves large-angle light distribution, and is suitable for different types of infrared emitters.
Smart Images
Figure CN120928490A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of lenses, and in particular to a multi-shot, wide-angle emission lens. Background Technology
[0002] Currently, there are various types of sensor emitting lenses on the market. These lenses are responsible for shaping the emitted light, expanding or reducing the coverage area of the light source. However, most emitting lenses can only shape the emitted beam into a collimated laser, and such lenses often only cover a very small angle range. Furthermore, emitted infrared light is reflected upon encountering a target, and this reflection can be specular or Gaussian. When the coverage area of the emitted light is small, the sensor can only react to objects within its coverage area. When the sensor system needs to react to a larger range of objects, a smaller area of light coverage is insufficient. Summary of the Invention
[0003] The purpose of this application is to provide a multi-shot, wide-angle emission lens that reduces the limitations on the light source, has a simple structure, and improves the detection sensitivity of the object being detected.
[0004] To achieve the above objectives, this application provides the following solution:
[0005] In a first aspect, this application provides a multi-shot wide-angle emission lens, which, when it is an odd-numbered lens, includes a central lens and at least a set of edge lenses;
[0006] The set of edge lenses includes a first edge lens and a second edge lens, which are arranged on both sides of the central lens in a small-angle symmetrical structure.
[0007] The inner surface of the central lens and each edge lens has a negative curvature in the Y direction, and the outer surface has a positive curvature in the Y direction.
[0008] During operation, the central lens and each edge lens correspond to a single light source, and the light coverage areas formed by the central lens and each edge lens are superimposed to form a total light coverage area.
[0009] Preferably, the single-element light source is an infrared emitter.
[0010] Preferably, each edge lens has a different radius of curvature in the X and Y directions.
[0011] Preferably, the light coverage angle in the Y direction of each edge lens is greater than or equal to the light coverage angle in the X direction.
[0012] Preferably, the X direction of each edge lens is used to converge the received light in the X direction, and the Y direction is used to deflect the received light in the Y direction.
[0013] Secondly, this application provides a multi-shot wide-angle emission lens, which, when it is an even number of lenses, includes at least one set of edge lenses;
[0014] The set of edge lenses includes a first edge lens and a second edge lens, wherein the first edge lens and the second edge lens are arranged in a symmetrical structure;
[0015] The inner surface of each edge lens has a negative curvature in the Y direction, and the outer surface has a positive curvature in the Y direction.
[0016] During operation, each edge lens corresponds to a single light source, and the light coverage areas formed by each edge lens are superimposed to form the total light coverage area.
[0017] Preferably, the light coverage angle in the Y direction of each edge lens is greater than or equal to the light coverage angle in the X direction.
[0018] Preferably, the X direction of each edge lens is used to converge the received light in the X direction, and the Y direction is used to deflect the received light in the Y direction.
[0019] According to the specific embodiments provided in this application, the following technical effects are disclosed: This application provides a lens with a multi-group combined structure consisting of a central lens and at least one set of edge lenses. The edge lenses include a first edge lens and a second edge lens, which are arranged symmetrically on both sides of the central lens at a small angle. The inner surface of the central lens and each edge lens has a negative curvature in the Y direction, while the outer surface has a positive curvature in the Y direction. This structure is simple and effective, easy to manufacture, and allows for effective cost control. During operation, the central lens and each edge lens correspond to a single-emission light source. The light coverage areas formed by the central lens and each edge lens overlap to form a total light coverage area. That is, by combining multiple lenses, the light coverage area can be increased, effectively increasing the light density and thus improving the detection sensitivity of the object being detected. Furthermore, by using multiple lenses and multiple light sources, the problems of insufficient energy in infrared emitters and low light density at large angles are avoided. In other words, this application reduces the limitations on the light source and can be applied to different types of emitters. Then, through the precise coordination between multiple emitters and multiple lenses, a large-angle light distribution effect is effectively achieved. Attached Figure Description
[0020] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0021] Figure 1 This is a schematic diagram of a multi-shot, large-angle emission lens with an odd number of lenses in one embodiment.
[0022] Figure 2 This is a schematic diagram of the light emission angle in the Y direction of the edge lens in an embodiment of this application.
[0023] Figure 3 This is a schematic diagram of the light emission angle in the X direction of the edge lens in an embodiment of this application.
[0024] Figure 4 This is a schematic diagram of the light emission angle in the Y direction of the two edge lenses in the embodiment of this application.
[0025] Figure 5 This is a schematic diagram of the structure of a multi-shot, wide-angle emission lens with an even number of lenses in one embodiment of this application.
[0026] Figure label:
[0027] 1-Central lens, 2-First edge lens, 3-Second edge lens, 4-First infrared emitter, 5-Second infrared emitter, 6-Third infrared emitter, 7-First light coverage area, 8-Second light coverage area, 9-Third light coverage area. Detailed Implementation
[0028] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0029] To fill the gap in infrared wide-angle receiving lenses, this application provides a multi-emitting wide-angle emitting lens that divides the infrared emitters into regions, with each emitter corresponding to a specific detection area. It employs a polarizing lens design to expand the light-shaping angle of the emitting lens, increasing the emitted light angle and expanding the sensor's detection range. This also increases the uniformity of angles, improves multi-directional sensitivity, and eliminates angular banding. The lens structure is simple, reducing the temperature of electronic products by 10%.
[0030] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments.
[0031] In one exemplary embodiment, such as Figure 1 As shown, a multi-shot, large-angle emission lens is provided, which has a simple and effective structure. When it is an odd-numbered lens, it includes a central lens 1 and at least a set of edge lenses. The set of edge lenses includes a first edge lens 2 and a second edge lens 3, which are arranged in a small-angle symmetrical structure on both sides of the central lens. The inner surface of the central lens 2 and each edge lens has a negative curvature in the Y direction, and the outer surface has a positive curvature in the Y direction.
[0032] During operation, the central lens 2 and each edge lens correspond to a single-shot light source, which is an infrared emitter. Figure 1 The system comprises a first infrared emitter 4, a second infrared emitter 5, and a third infrared emitter 6. The infrared light emitted by each emitter is processed by corresponding lenses at different angles to achieve light distribution, thereby forming corresponding first light coverage area 7, second light coverage area 8, and third light coverage area 9. The light coverage areas formed by the central lens 2 and each edge lens are superimposed to form the total light coverage area.
[0033] In a specific application, each edge lens uses different radii of curvature in the X and Y directions, especially in the Y direction, which is usually a free-form or irregular surface.
[0034] In another specific application, the light coverage angle in the Y direction of each edge lens is greater than or equal to the light coverage angle in the X direction. Specifically, such as... Figure 2 and Figure 3 As shown, the Y-direction employs a large-angle design with a light coverage angle of α1, while the X-direction uses a small-angle design with a light coverage angle of β. The X-direction of each edge lens is used to converge the received light, meaning the X-direction has stronger light-gathering capability. When the β value is sufficiently small, approaching 0 degrees, the light density is maximized, ensuring both a wide-angle illumination range and high light density or sensing sensitivity. The Y-direction is used to deflect the received light, employing a polarizing design to deflect the normally emitted light source towards the center of the desired light coverage area in the Y-direction.
[0035] The light coverage angle β in the X direction can also be larger, even making β = α. This example is just one demonstration in practice. However, as β decreases, the light density increases accordingly; simply increasing the transmitter power or receiver amplification is sufficient.
[0036] Generally, the two light coverage angles are not set with specific numbers, but are mainly set based on the sensor's sensing area. The following is a numerical range: α1≥β.
[0037] In one application example, the working process of this application is as follows: a first edge lens 2 is set at the emitting end of the first infrared emitter 4, a central lens 1 is set at the emitting end of the second infrared emitter 5, and a second edge lens 3 is set at the emitting end of the third infrared emitter 6, so as to change the shape of the emitted beam and form a divergent distribution area. The divergent infrared light falls on the object being detected and forms a reflected light similar to Lambertian scattering through the object being detected. The reflected light is received by the receiving sensor, thereby generating a sense.
[0038] The above-mentioned structural design avoids the shortcomings of traditional small-angle emission illumination range, and can form a larger-angle emission detection area, increasing the coverage of emitted light; the emission lens increases the light distribution range, which increases the detection range of the detected object and reduces the possibility of the detected object escaping detection.
[0039] In addition, the materials used to make the central lens 1, the first edge lens 2 and the second edge lens 3 can be low-cost PMMA or PC, and other materials that can be injection molded can also be used, so the requirements for materials are not high.
[0040] In another specific application, when the multi-shot wide-angle emission lens of this application includes a central lens 1 and two sets of edge lenses, the four edge lenses are symmetrically arranged on both sides of the central lens 1.
[0041] The above describes the structure of a multi-shot wide-angle emission lens with an odd number of lenses. Based on the same inventive concept, this application also provides the structure of a multi-shot wide-angle emission lens with an even number of lenses. The implementation scheme of the even number of lenses is similar to the implementation scheme described in the above description of the odd number of lenses. Therefore, the specific limitations of one or more even number of lens embodiments provided below can be found in the above description of the limitations of the odd number of lenses, and will not be repeated here.
[0042] The structure of a multi-shot, wide-angle emission lens with an even number of lenses, such as... Figure 4 and Figure 5 As shown, when the multi-shot large-angle emission lens is an even number of lenses, it includes at least one set of edge lenses, meaning the number of lenses is equal to 2. Furthermore, multiple sets of edge lenses can be provided as needed. One set of edge lenses includes a first edge lens 2 and a second edge lens 3, which are arranged symmetrically to divide the total light coverage area into two symmetrical regions. The inner surface of each edge lens has a negative curvature in the Y direction, and the outer surface has a positive curvature in the Y direction.
[0043] During operation, each edge lens corresponds to a single-shot light source, which is an infrared emitter. Figure 5 The first infrared emitter 4 and the third infrared emitter 6 are located in the structure. The infrared light emitted by each infrared emitter is processed by lenses at corresponding angles to achieve light distribution, thereby forming corresponding first light coverage area 7 and third light coverage area 9. The light coverage areas formed by each edge lens are superimposed to form the total light coverage area. That is, when the light coverage angles of the two edge lenses are α1 and α2 respectively, the total light coverage angle is α = α1 + α2.
[0044] In a specific application, the light coverage angle in the Y direction of each edge lens is greater than or equal to the light coverage angle in the X direction. The X direction of each edge lens is used to converge the received light in the X direction, and the Y direction is used to deflect the received light in the Y direction.
[0045] Compared with the prior art, this application has the following advantages:
[0046] 1) It has few limitations on the light source and can be applied to different types of infrared emitters; 2) It has a simple and effective structure, small size, is easy to manufacture, and its cost can be effectively controlled; 3) Through the precise coordination between multiple sets of emission groups, it effectively achieves a large-angle light distribution effect; 4) By adopting a multi-group combination structure, it can effectively increase the light density and improve the detection sensitivity of the detected object.
[0047] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0048] This document uses specific examples to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the methods and core ideas of this application. Furthermore, those skilled in the art will recognize that, based on the ideas of this application, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this application.
Claims
1. A multi-shot, wide-angle emission lens, characterized in that, When the multi-shot wide-angle emission lens is an odd-numbered lens, it includes a central lens and at least one set of edge lenses; The set of edge lenses includes a first edge lens and a second edge lens, which are arranged on both sides of the central lens in a small-angle symmetrical structure. The inner surface of the central lens and each edge lens has a negative curvature in the Y direction, and the outer surface has a positive curvature in the Y direction. During operation, the central lens and each edge lens correspond to a single light source, and the light coverage areas formed by the central lens and each edge lens are superimposed to form a total light coverage area.
2. The multi-shot, wide-angle emission lens according to claim 1, characterized in that, The single-element light source is an infrared emitter.
3. The multi-shot, wide-angle emission lens according to claim 1, characterized in that, Each edge lens uses a different radius of curvature in the X and Y directions.
4. The multi-shot, wide-angle emission lens according to claim 1, characterized in that, The light coverage angle in the Y direction of each edge lens is greater than or equal to the light coverage angle in the X direction.
5. The multi-shot, wide-angle emission lens according to claim 1, characterized in that, Each edge lens is used to converge the received light in the X direction and deflect the received light in the Y direction in the Y direction.
6. A multi-shot, wide-angle emission lens, characterized in that, When the multi-shot large-angle emission lens is an even number of lenses, it includes at least one set of edge lenses; The set of edge lenses includes a first edge lens and a second edge lens, wherein the first edge lens and the second edge lens are arranged in a symmetrical structure; The inner surface of each edge lens has a negative curvature in the Y direction, and the outer surface has a positive curvature in the Y direction. During operation, each edge lens corresponds to a single light source, and the light coverage areas formed by each edge lens are superimposed to form the total light coverage area.
7. The multi-shot, wide-angle emission lens according to claim 6, characterized in that, The light coverage angle in the Y direction of each edge lens is greater than or equal to the light coverage angle in the X direction.
8. The multi-shot wide-angle emission lens according to claim 6, characterized in that, Each edge lens is used to converge the received light in the X direction and deflect the received light in the Y direction in the Y direction.