Lens structure

Abstract

The utility model provides a lens structure which comprises an optical imaging part and a structural flange part, and the structural flange part is formed on the periphery of the optical imaging part. A special-shaped structure is formed on the structural flange part and used for improving the flow velocity and the wavefront included angle in the lens forming process, improving weld marks and avoiding stray light. The lens structure provided by the utility model can improve weld marks and ensure the imaging quality of the lens.

Description

Technical Field

[0001] This application belongs to the field of optical equipment technology, and in particular relates to a lens structure. Background Technology

[0002] As lens products evolve, optical designs are becoming increasingly extreme in order to improve lens image quality. However, the molding of lenses with large thickness-to-thin ratios can easily lead to a series of problems. These lenses are difficult to mold, have high weld line separation, and their molding weld lines are difficult to improve. In addition to causing defects in the appearance of the lens, they can also generate stray light, affecting the image quality of the lens.

[0003] Currently, there is a lack of lens structure that can improve weld lines and ensure the image quality of the lens. Utility Model Content

[0004] In view of the shortcomings of the prior art, the present invention provides a lens structure that can improve weld lines and ensure the imaging quality of the lens.

[0005] To achieve the above objectives, this utility model provides a lens structure, including an optical imaging part and a structural flange part, wherein the structural flange part is formed on the periphery of the optical imaging part; the structural flange part has an irregular structure, which is used to improve the flow rate and wavefront angle during lens forming, improve weld lines, and avoid the generation of stray light.

[0006] According to one embodiment of this application, the structural flange portion forms a plurality of slits, which constitute the heterogeneous structure.

[0007] According to one embodiment of this application, the cut edges are asymmetrically distributed along the circumference of the structural flange portion.

[0008] According to one embodiment of this application, the two sides of the structural flange portion form symmetrical cut edges.

[0009] According to one embodiment of this application, the width 2H between the cut edges, the maximum radius R of the structural flange portion, the radius r of the optical imaging portion, and the distance a from the cut edge to the optical imaging portion satisfy: (r+a) / R≤H / R<1.

[0010] According to one embodiment of this application, the center thickness L of the optical imaging portion and the thickness L1 of the structural flange portion satisfy: L1 / L≥2.

[0011] According to one embodiment of this application, the outer side of the structural flange portion is formed with a bevel.

[0012] Because of the adoption of the above technical solution, this utility model has the following beneficial effects:

[0013] The use of irregular structures can improve flow rate and wavefront angle during lens forming, effectively reducing or eliminating weld lines, preventing stray light, and improving the lens forming process window. By forming irregular structures through edge cutting, the effect of improving weld lines can be achieved without adding any processes. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the lens structure according to an embodiment of the present utility model;

[0016] Figure 2 This is a side view of the lens structure according to an embodiment of the present invention;

[0017] Figures 3-4 This is a simulation diagram of the lens mold flow and a diagram of the lens weld line state when the cutting edge size is x, according to an embodiment of this utility model.

[0018] Figures 5-6 This is a simulation diagram of the lens mold flow and a diagram of the lens weld line state when the cutting edge size is 2x according to an embodiment of this utility model;

[0019] Figures 7-8 The image shows a simulation diagram of the lens mold flow and a diagram of the lens weld line state when the cutting edge size is 3x, according to an embodiment of this utility model.

[0020] Explanation of icon numbers:

[0021] 1-Structural flange section;

[0022] 2-Optical Imaging Section;

[0023] 3-Cut the edge;

[0024] 4- Weld line. Detailed Implementation

[0025] 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 of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0026] It should be noted that in this specification, the terms "first," "second," "third," etc., are used only to distinguish one feature from another and do not imply any limitation on the feature.

[0027] It should also be understood that the terms "comprising," "including," "having," "containing," and / or "comprising," when used in this specification, indicate the presence of the stated features, elements, and / or components, but do not exclude the presence or addition of one or more other features, elements, components, and / or combinations thereof. Furthermore, when expressions such as "at least one of..." appear after a list of listed features, they modify the entire list of features, not individual elements in the list. Additionally, when describing embodiments of this application, the word "may" is used to mean "one or more embodiments of this application." And the term "exemplary" is intended to refer to an example or illustration.

[0028] Unless otherwise specified, all terms used herein (including technical and scientific terms) shall have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. It should also be understood that terms (e.g., those defined in common dictionaries) shall be interpreted as having the meaning consistent with their meaning in the context of the relevant art and shall not be interpreted in an idealized or overly formalized manner unless expressly so specified herein.

[0029] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The features, principles, and other aspects of this application will now be described in detail with reference to the accompanying drawings and embodiments.

[0030] Example 1

[0031] Please see Figures 1 to 8 According to an embodiment of this application, a lens structure includes an optical imaging part 2 and a structural flange part 1. The structural flange part 1 is formed on the periphery of the optical imaging part 2. The structural flange part 1 has an irregular structure, which is used to improve the flow rate and wavefront angle during lens forming, improve the weld line 4, and avoid the generation of stray light.

[0032] The use of anisotropic structures can improve the flow rate and wavefront angle during lens forming, effectively improve or reduce weld lines 4, avoid stray light, and improve the lens forming process window.

[0033] According to one embodiment of this application, the structural flange portion 1 forms a plurality of cut edges 3, which constitute the irregular structure. By forming the irregular structure through cut edges, the weld lines 4 can be improved without adding any processing steps.

[0034] According to one embodiment of this application, the structural flange portion 1 has symmetrical cut edges 3 formed on both sides.

[0035] According to one embodiment of this application, the width 2H between the cut edges 3, the maximum radius R of the structural flange portion 1, the radius r of the optical imaging portion 2, and the distance a from the cut edge 3 to the optical imaging portion 2 satisfy: (r+a) / R≤H / R<1. By ensuring the optical imaging aperture and a machining allowance of 0.015, both the weld line 4 can be improved, and the imaging quality can be guaranteed.

[0036] According to one embodiment of this application, the center thickness L of the optical imaging portion 2 and the thickness L1 of the structural flange portion 1 satisfy: L1 / L≥2. The use of an irregular structure in this application is to improve the lens's ability to meet the above specifications, as such lenses are difficult to mold and have high weld lines.

[0037] According to one embodiment of this application, the outer side of the structural flange portion 1 is formed with a bevel.

[0038] Figure 1 and Figure 2 This is a lens structure diagram of Embodiment 1 of this application. The outer diameter of the lens is φ2R, L is the center thickness of the optical imaging part 2, and L1 is the thickness of the structural flange part 1, which is also the thickest dimension of the lens; the thickness ratio L1 / L≥2; if it is a full circular structure, the weld line 4 is a high risk, and it is difficult to balance surface accuracy and weld line 4; after the edge is cut, the half-diameter H is the optical imaging half-diameter r, the effective optical imaging half-diameter r, a is the distance from the cut edge 3 to the optical imaging part 2, and is also a necessary dimension for processing and forming, 0<a; after the edge is cut, the formula must be satisfied: (r+a) / R≤H / R<1.

[0039] like Figures 3-8 As shown, when the trimming ratio increases, i.e., as the trimming half-diameter H decreases, the weld line 4 gradually improves; when n = RH, simulation software was used to simulate different trimming dimensions. Under constant molding conditions, the weld line 4 length decreases as n increases. Figure 3 , Figure 5 and Figure 7 The direction of molten material flow during forming is indicated by the color change from red to green to blue.

[0040] Example 2

[0041] The lens structure of Embodiment 2 of this application is basically the same as that of Embodiment 1, except that the cut edge 3 is asymmetrically distributed along the circumference of the structural flange portion 1.

[0042] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, improvements, or equivalent substitutions made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A lens structure, characterized by, The structure flange part is formed with a special structure for improving the flow rate and wave front angle in the lens forming process, improving the welding mark and avoiding the generation of stray light.

2. The lens structure of claim 1, wherein, The structure flange part is formed with a special structure for improving the flow rate and wave front angle in the lens forming process, improving the welding mark and avoiding the generation of stray light.

3. The lens structure of claim 2, wherein, The structure flange part is formed with a special structure for improving the flow rate and wave front angle in the lens forming process, improving the welding mark and avoiding the generation of stray light.

4. The lens structure of claim 2, wherein, The structure flange part is formed with a special structure for improving the flow rate and wave front angle in the lens forming process, improving the welding mark and avoiding the generation of stray light.

5. The lens structure of claim 4, wherein, The structure flange part is formed with a special structure for improving the flow rate and wave front angle in the lens forming process, improving the welding mark and avoiding the generation of stray light.

6. The lens structure according to any one of claims 1 to 5, wherein, The structure flange part is formed with a special structure for improving the flow rate and wave front angle in the lens forming process, improving the welding mark and avoiding the generation of stray light.

7. The lens structure of claim 6, wherein, The structure flange part is formed with a special structure for improving the flow rate and wave front angle in the lens forming process, improving the welding mark and avoiding the generation of stray light. The structure flange part is formed with a special structure for improving the flow rate and wave front angle in the lens forming process, improving the welding mark and avoiding the generation of stray light. The structure flange part is formed with a special structure for improving the flow rate and wave front angle in the lens forming process, improving the welding mark and avoiding the generation of stray light. The structure flange part is formed with a special structure for improving the flow rate and wave front angle in the lens forming process, improving the welding mark and avoiding the generation of stray light. The structure flange part is formed with a special structure for improving the flow rate and wave front angle in the lens forming process, improving the welding mark and avoiding the generation of stray light. The structure flange part is formed with a special structure for improving the flow rate and wave front angle in the lens forming process, improving the welding mark and avoiding the generation of stray light. The structure flange part is formed with a special structure for improving the flow rate and wave front angle in the lens forming process, improving the welding mark and avoiding the generation of stray light. The structure flange part is formed with

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