Single-emission type large-angle emission lens
By designing the inner and outer surfaces of the XY polynomial optical lens, a large-angle light distribution was achieved, solving the problem of small-angle coverage of the sensor and improving the sensor's detection sensitivity and coverage.
Patent Information
- Application Number
- CN202511373874.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-24
- Publication Date
- 2025-11-28
AI Technical Summary
Existing sensor emission lenses can only cover a small angle range, which cannot meet the needs of large-scale detection, and the sensor's response to the detected object is limited.
The optical lens adopts an XY polynomial surface design for its inner and outer surfaces. The inner surface of the optical lens is firstly distributed, and the outer surface is secondarily distributed. By combining the X and Y directions with different curvature designs, a large-angle uniform light distribution is formed.
It expands the sensor's detection range, improves multi-directional sensitivity, reduces the possibility of detected objects escaping, and has a simple structure and low cost.
Smart Images
Figure CN121028263A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the field of sensor lens, in particular to a single-shot large-angle emission lens. BACKGROUND
[0002] There are many kinds of sensor emission lenses on the market at present, and infrared emission lenses are generally based on single lens. In application, the emission lens is responsible for shaping the emitted light, expanding or reducing the coverage range of the light source. Most lenses can only shape the light beam emitted by the light source into collimated laser, and such emission lens can only cover a very small angle range. Moreover, the infrared emission light will be reflected after encountering the detection target. The emission is divided into specular reflection and Gaussian reflection. When the coverage range of the emitted light is small, the sensor can only react to the sensing object within the coverage range. When the sensor system needs to react to a larger range of sensing objects, the small-area light source coverage cannot meet the demand. SUMMARY
[0003] The purpose of the present application is to provide a single-shot large-angle emission lens which can form a larger angle of emission detection area, increase the coverage range of the emitted light, and reduce the possibility of the detected object escaping detection.
[0004] To achieve the above purpose, the present application provides the following solutions:
[0005] A single-shot large-angle emission lens, comprising an inner surface of an optical lens and an outer surface of an optical lens;
[0006] The inner surface of the optical lens is used for distributing the received light once to increase the angle of light distribution, and then sending it to the outer surface of the optical lens; wherein the light received by the inner surface of the optical lens comes from a single light source emission system;
[0007] The outer surface of the optical lens is used for distributing the light distributed once again to make the light of each angle uniformly emitted;
[0008] The inner surface of the optical lens and the outer surface of the optical lens are both XY polynomial surface types.
[0009] Preferably, the inner surface of the optical lens is a cylindrical mirror structure, the X direction and the Y direction of the inner surface of the optical lens adopt different radii of curvature, and the Y direction of the inner surface of the optical lens is a negative curvature.
[0010] Preferably, the X direction and the Y direction of the outer surface of the optical lens adopt different radii of curvature, and the X direction and the Y direction of the outer surface of the optical lens are both positive curvatures.
[0011] Preferably, the outer surface of the optical lens comprises a central region and a plurality of edge regions, and the plurality of edge regions are symmetrically arranged on both sides of the central region.
[0012] Preferably, the light exit angle of the outer surface of the optical lens in the Y direction is greater than the light exit angle of the outer surface of the optical lens in the X direction.
[0013] Preferably, the value of the curvature of the inner surface of the optical lens in the Y direction is greater than the value of the curvature in the X direction.
[0014] Preferably, the value of the curvature of the outer surface of the optical lens in the X direction is greater than the value of the curvature in the Y direction.
[0015] Preferably, the light received by the inner surface of the optical lens is infrared light, and the single light source emission system is an infrared emitter.
[0016] According to the specific embodiments provided in the present application, the present application discloses the following technical effects: the present application distributes the received light through the inner surface of the optical lens once to increase the angle of the light distribution angle and then sends it to the outer surface of the optical lens; the outer surface of the optical lens is used to distribute the light which has been distributed once twice to make the light of each angle be uniformly emitted. Through the cooperative arrangement of the above two structures, the uniformity of each angle is increased, the multi-directional sensitivity is improved, the angle discontinuity is eliminated, the shaping angle of the light rays by the emission lens is expanded, the exit light angle is increased, and the sensor detection range is expanded. Among them, the light received by the inner surface of the optical lens comes from the single light source emission system, and the use of the single light source emission system can reduce the complexity of the system. In the present application, the inner surface of the optical lens and the outer surface of the optical lens are both XY polynomial surface types. Through the design of the non-axially symmetric lens, the X direction and the Y direction with different curvature designs can be used to control the angle in different directions, thereby improving the sensitivity of the sensor.
[0017] In summary, the present application avoids the shortcomings of the traditional small-angle emission illumination range, can form a large-angle emission detection area, and increases the emission light coverage range; also increases the light distribution range, which makes the detection range of the detected object increase and reduces the possibility of the detected object escaping detection. BRIEF DESCRIPTION OF DRAWINGS
[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.
[0019] Figure 1 It is a schematic diagram of a single-shot large-angle emission lens in an embodiment of the present application;
[0020] Figure 2 A schematic diagram of the light exit angle in the Y direction of a single-shot wide-angle emission lens according to an embodiment of the present application.
[0021] Figure 3 A schematic diagram of the light exit angle in the X direction of a single-shot wide-angle emission lens according to an embodiment of the present application.
[0022] Figure 4 A schematic diagram of a multi-region of an optical lens outer surface according to an embodiment of the present application.
[0023] Reference signs:
[0024] 1 - single-shot wide-angle emission lens, 2 - optical lens inner surface, 3 - optical lens outer surface, 4 - infrared emitter, 31 - center region, 32 - edge region. DETAILED DESCRIPTION
[0025] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.
[0026] In order to make the objects, characteristics and advantages of the present application more obvious and easy to understand, the present application will be further described in detail below with reference to the drawings and specific embodiments.
[0027] In one exemplary embodiment, as shown in Figure 1 , a single-shot wide-angle emission lens 1 is provided, including an optical lens inner surface 2 and an optical lens outer surface 3.
[0028] The optical lens inner surface 2 is configured to distribute the received light once to increase the angle of the light distribution angle, and then send it to the optical lens outer surface 3; wherein the light received by the optical lens inner surface comes from a single-source emission system. The optical lens outer surface 3 is configured to distribute the light distributed once again to make the light of each angle exit uniformly; the optical lens inner surface 2 and the optical lens outer surface 3 are both XY polynomial surface types.
[0029] As shown in Figure 2 and Figure 3 , the Y direction of the optical lens outer surface 3 adopts a wide-angle design, and the light coverage angle is a; the X direction adopts a small-angle design, and the light coverage angle is β. The light exit angle in the Y direction of the optical lens outer surface 3 is greater than the light exit angle in the X direction of the optical lens outer surface 3.
[0030] When the value of β is small enough to approach 0 degrees, the optical density is maximum, which can ensure a large angle range of illumination range and a high optical density or sensing sensitivity. β can also be larger, and even β = α, which is only one of the demonstrations in actual operation. But when β is smaller, the optical density will increase accordingly, which only needs to increase the corresponding emitter power or receiver amplification.
[0031] In an actual application, the inner surface 2 of the optical lens is designed using a cylindrical mirror, which has different curvature radii in the X and Y directions, and the Y direction of the inner surface 2 of the optical lens has a negative curvature. Among them, the curvature of the Y direction of the inner surface 2 of the optical lens is greater than the curvature of the X direction, and the Y direction of the inner surface has a stronger divergence ability.
[0032] In another actual application, the X and Y directions of the outer surface 3 of the optical lens have different curvature radii, and a surface coefficient can be added, and the X and Y directions of the outer surface 3 of the optical lens are both positive curvature. Among them, the curvature of the X direction of the outer surface 3 of the optical lens is greater than the curvature of the Y direction, and the Y direction has a stronger divergence ability, and the X direction has a stronger light convergence ability.
[0033] In actual application, the lens surface can also be designed in sections, and the number and size of the sections are not fixed and can be adjusted according to actual needs. For example,
[0034] As shown in the figure, the outer surface 3 of the optical lens includes a central region 31 and a plurality of edge regions 32, and the plurality of edge regions 32 are symmetrically arranged on both sides of the central region 31.
[0035] In addition, the preparation material of the single-shot large-angle emission lens is low-cost PMMA (PolyMethylMethAcrylate, PolyMethylMethAcrylate) or PC (Polycarbonate, Polycarbonate), and any material that can be injection molded can be used, and the requirement for the material is not high.
[0036] In an application example, the light received by the inner surface of the optical lens is infrared light (other light can be used, but infrared light is generally used), and the single-light-source emission system is an infrared emitter 4. That is, in an application scenario, an infrared emitter 4 and the single-shot large-angle emission lens 1 of the present application are used to form a simple and effective structure. The working process is: the single-shot large-angle emission lens 1 of the present application is arranged at the emission end of the infrared emitter 4 to change the shape of the emitted light beam and form a diverging distribution area, and the diverging infrared light falls on the detected object. The reflected light similar to the Lambertian scattering formed by the detected object is received by the receiving sensor, thereby generating a response.
[0037] The structure avoids the shortcomings of the conventional small-angle emission illumination range, can form a large-angle emission detection area, and increases the emission light coverage range; 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.
[0037] Compared with the prior art, the application has the following advantages:
[0038] 1) The limitation on the light source is small, can be applied to different forms of infrared emitters, and uses a single light source emission system to reduce the complexity of the system; 2) The structure is simple and effective, small in size, easy to manufacture, and the cost can be effectively controlled; 3) Through the design of the non-axisymmetric lens, different curvature designs can be used in X and Y directions to realize angle control in different directions, thereby improving the sensitivity of the sensor; 4) The lens surface adopts a partition design form, which increases the flexibility of light distribution; 5) The light curtain type light distribution form is used, a large-angle distribution light is used in one direction, and a small-angle light is maintained in one angle, which increases the light density; 6) Through the precise cooperation between the inner surface and the outer surface, the large-angle light distribution effect is effectively realized.
[0039] The technical features of the above embodiments can be combined arbitrarily, and to make the description concise, not all possible combinations of the technical features in the above embodiments are described, however, as long as the combination of the technical features does not exist contradictory, it should be considered as the scope of the present application.
[0040] The principles and implementation modes of the present application are described by applying specific examples herein, and the above embodiment description is only used to help understand the method and its core idea of the present application; at the same time, for those skilled in the art, according to the idea of the present application, the specific implementation mode and application range will be changed. In conclusion, the content of the specification should not be understood as a limitation of the present application.
Claims
1. A single-shot, wide-angle emission lens, characterized in that, The single-shot wide-angle emission lens includes an inner surface of the optical lens and an outer surface of the optical lens; The inner surface of the optical lens is used to initially distribute the received light to increase the light distribution angle before sending it to the outer surface of the optical lens; wherein, the light received by the inner surface of the optical lens comes from a single-source emission system; The outer surface of the optical lens is used to redistribute the light that has been redistributed once, so that the light is emitted uniformly from all angles. Both the inner and outer surfaces of the optical lens are XY polynomial surfaces.
2. The single-shot, large-angle emission lens according to claim 1, characterized in that, The inner surface of the optical lens is a cylindrical mirror structure, and the X and Y directions of the inner surface of the optical lens have different radii of curvature, with the Y direction of the inner surface of the optical lens having a negative curvature.
3. The single-shot, large-angle emission lens according to claim 1, characterized in that, The outer surface of the optical lens has different radii of curvature in the X and Y directions, and both the X and Y directions of the outer surface of the optical lens have positive curvature.
4. The single-shot, large-angle emission lens according to claim 1, characterized in that, The outer surface of the optical lens includes a central region and multiple edge regions, and the multiple edge regions are symmetrically arranged on both sides of the central region.
5. The single-shot, large-angle emission lens according to claim 1, characterized in that, The light emission angle in the Y direction from the outer surface of the optical lens is greater than the light emission angle in the X direction from the outer surface of the optical lens.
6. The single-shot, large-angle emission lens according to claim 2, characterized in that, The curvature of the inner surface of the optical lens in the Y direction is greater than the curvature in the X direction.
7. The single-shot, large-angle emission lens according to claim 3, characterized in that, The curvature of the outer surface of the optical lens in the X direction is greater than the curvature in the Y direction.
8. The single-shot, large-angle emission lens according to claim 1, characterized in that, The light received by the inner surface of the optical lens is infrared light, and the single-source emission system is an infrared emitter.