Low-stray-light lens, lens and camera

Abstract

The utility model discloses a low stray light lens, a lens and a camera, and relates to the field of optical equipment, the edge of the lens is provided with a tooth-shaped structure, the tooth-shaped structure is distributed on the whole side wall of the edge of the lens, the surface of the tooth-shaped structure is plated with an anti-reflection film, the lens comprises the lens and a lens barrel, and the camera comprises the lens. According to the utility model, the tooth-shaped structure is arranged on the edge of the lens, the surface area of the side wall of the edge of the lens is increased, the anti-reflection film is plated on the surface of the tooth-shaped structure, and the parasitic light reflectivity of the edge of the lens is reduced through the anti-reflection film; the interference between the lens and the lens barrel does not damage the anti-reflection film of the groove part on the tooth-shaped structure, thereby guaranteeing the lens assembly effect, guaranteeing the purpose of reducing the stray light at the edge of the lens, eliminating the partial stray light at the edge of the lens, guaranteeing the anti-reflection effect at the edge of the lens, improving the image quality of the camera, enhancing the visual recognition effect, and prolonging the service life of the camera. The measurement and detection precision is improved, and the visual experience of a user is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to optical equipment technical field especially, be related to a kind of low stray light's lens, lens and camera. BACKGROUND

[0002] In order to reduce stray light in optical lens, a layer of antireflection film will be coated on the lens, or an antireflection film or light shielding film will be added when the lens is assembled onto the lens barrel. Patent application number CN201810690882.7 discloses an optical plastic lens and a manufacturing method thereof. The lens includes an optical plastic substrate, a silica transition layer disposed on the optical plastic substrate, and an antireflection film layer disposed on the silica transition layer. The antireflection film layer is formed by alternately stacking silica films and titanium dioxide films, with at least four silica films and three titanium dioxide films. Moisture is less likely to enter the film, thereby avoiding surface fogging, improving light transmittance, and enhancing user experience. Patent application number CN201920210977.4 discloses a lens. The lens includes a lens barrel with an axial end assembly opening, at least one optical lens, and at least one annular light extinction member. The at least one optical lens and the at least one annular light extinction member are arranged in the lens barrel along the optical axis direction. An annular light extinction member with a compression ring as its annular base material is located on the side of the optical lens closest to the axial end assembly opening. The annular light extinction member includes an annular base material and a light extinction film disposed on the surface of the annular base material. The annular light extinction member is coated with a layer of light extinction film on the surface of the annular base material. The light extinction film has high haze and low gloss, which can eliminate the surface reflection of the annular base material. The annular light extinction member is applied to separate or press the optical lens in the lens, which can reduce the reflection of imaging light in the lens and alleviate the flare problem of the lens to some extent. Patent application number CN202411168241.7 discloses a filter manufacturing process and a single-particle filter. The required pattern is printed on the front surface of the single-particle filter using a printed screen. The four straight edges of the single-particle filter are coated with leveling ink to eliminate stray light.

[0003] Optical lens edge (the edge of the helicopter) often produces stray light, the conventional method is to do the surface of the fogging treatment, but the fogging treatment will affect the assembly accuracy, and the fogging treatment can only disperse stray light, can not reduce the reflectivity of stray light, the best way is still in the edge (the edge of the helicopter) coating anti-reflective film, but the edge (the edge of the helicopter) coating anti-reflective film, in the lens assembly, the lens and the barrel have a certain amount of interference, that is, the lens peripheral size will be slightly larger than the lens inner circle size, so as to ensure the stability of the assembly, but this will bring a consequence: the edge of the lens (the edge of the helicopter) coated with anti-reflective film is easy to be damaged, so there is no anti-reflective effect, can not eliminate the stray light produced here. Therefore, the utility model discloses a kind of low stray light lens, lens and camera to solve the above problems. Utility model content

[0004] Therefore, it is necessary to provide a low stray light lens, lens and camera to solve the above technical problems by setting a tooth structure on the edge of the lens, increasing the surface area of the side wall of the lens edge, and coating an anti-reflective film on the surface of the tooth structure. The anti-reflective film reduces the stray light reflectivity of the lens edge. The design of the tooth structure ensures that the interference between the lens and the barrel does not damage the anti-reflective film on the groove part of the tooth structure during assembly, ensuring the lens assembly effect and the purpose of reducing the stray light of the lens edge. The part of the stray light of the lens edge is eliminated, the anti-reflective effect of the lens edge is ensured, the image quality of the camera is improved, the visual recognition effect is enhanced, the measurement and detection accuracy is improved, and the user's visual experience is improved.

[0005] To solve the above technical problems, the utility model adopts the following technical solutions:

[0006] A low stray light lens includes a lens, the edge of the lens has a tooth structure, the tooth structure is distributed on the entire side wall of the lens edge, and the surface of the tooth structure is coated with an anti-reflective film.

[0007] As a preferred embodiment of the low stray light lens provided by the utility model, the tooth structure includes a plurality of protrusions, the protrusions are arranged in a ring array with the center of the lens as the center, and a groove is formed between adjacent protrusions.

[0008] As a preferred embodiment of the low stray light lens provided by the utility model, an arc-shaped section is provided on the protrusion, and the arc-shaped section is provided on the side of the protrusion away from the lens.

[0009] As a preferred embodiment of the low stray light lens provided by the utility model, the length of the arc-shaped section accounts for 40%-60% of the circumference of the lens.

[0010] As a preferred embodiment of the low stray light lens provided by the utility model, the shape of the protruding cross section is one of semicircle, semi-ellipse, parabola, trapezoid or triangle.

[0011] As a preferred embodiment of the low stray light lens provided by the utility model, the shape of the protruding cross section is one of semicircle, semi-ellipse, parabola, trapezoid or triangle.

[0012] As a preferred embodiment of the low stray light lens provided by the utility model, the shape of the protruding cross section is one of semicircle, semi-ellipse, parabola, trapezoid or triangle.

[0013] The utility model provides a kind of lens, it includes lens barrel and above-mentioned lens, the lens is installed in lens barrel, and the tooth structure is attached with the inner wall of lens.

[0014] As a preferred embodiment of the lens provided by the utility model, the tooth structure includes a plurality of protrusions, the protrusions are arranged in a ring array with the center of the lens as the center, grooves are formed between adjacent protrusions, the protrusions are provided with arc surfaces, the arc surfaces are arranged on the side of the protrusions away from the lens, and the radius of the arc surfaces is consistent with the inner wall radius of the lens barrel.

[0015] A camera is also provided, which includes the lens described above.

[0016] Compared with the prior art, the low stray light lens, lens and camera provided by the utility model have the following beneficial effects: by arranging the tooth structure on the edge of the lens, the surface area of the edge side wall of the lens is increased, and the surface of the tooth structure is coated with an anti-reflective film, which reduces the stray light reflectivity of the lens edge through the anti-reflective film. The design of the tooth structure ensures that the interference between the lens and the lens barrel does not damage the anti-reflective film on the groove part of the tooth structure when the lens and the lens barrel are assembled, ensuring the lens assembly effect and the purpose of reducing the stray light at the edge of the lens. The partial stray light at the edge of the lens is eliminated, the anti-reflective effect of the lens edge is ensured, the image quality of the camera is improved, the visual recognition effect is enhanced, the measurement and detection accuracy is improved, and the user's visual experience is improved. BRIEF DESCRIPTION OF DRAWINGS

[0017] To more clearly illustrate the schemes in the utility model, the following will briefly introduce the drawings needed in the embodiment description. Obviously, the drawings in the following description are some embodiments of the utility model, and other drawings can be obtained by those skilled in the art without creative labor.

[0018] Figure 1 The overall structure of the low stray light lens provided by the utility model is shown in the plan view.

[0019] Figure 2 For Figure 1 enlarged view of the middle A;

[0020] Figure 3 the overall structure of the lens provided by the utility model is shown in the plane view;

[0021] Figure 4 For Figure 3 enlarged view of the middle B.

[0022] The figure mark is explained as follows:

[0023] 1, lens; 2, tooth structure; 21, protrusion; 22, groove; 23, arc-shaped section; 3, anti-reflection film; 4, lens barrel. DETAILED DESCRIPTION

[0024] In order for the person skilled in the art to better understand the utility model scheme, the technical scheme in the utility model embodiments will be clearly and completely described below in combination with the drawings in the utility model embodiments. Obviously, the described embodiments are only a part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor should belong to the protection scope of the utility model.

[0025] As described in the background, the edge (straight edge) of the optical lens often produces stray light, and the conventional processing method is to do fogging treatment on the surface, but the fogging treatment will affect the assembly precision, and the fogging treatment can only disperse the stray light, and cannot reduce the reflectivity of the stray light. The best way is still to coat the anti-reflection film on the edge (straight edge), but after coating the anti-reflection film on the edge (straight edge), the lens and the lens barrel are required to have a certain interference amount during lens assembly, that is, the outer peripheral size of the lens is slightly larger than the inner ring size of the lens. In this way, the stability of assembly can be ensured, but this will bring a consequence: the anti-reflection film coated on the edge (straight edge) of the lens is easily damaged, so that the anti-reflection effect is lost, and the stray light generated here cannot be eliminated.

[0026] In order to solve this technical problem, the utility model provides a low-stray-light lens, lens and camera, which is applied to the field of optical equipment.

[0027] Specifically, please refer to Figures 1-2 , the low-stray-light lens, specifically includes lens 1, the edge of the lens 1 has tooth structure 2, the tooth structure 2 is distributed on the entire side wall of the edge of the lens 1, the surface of the tooth structure 2 is coated with anti-reflection film 3.

[0028] Please refer to Figures 3-4The lens comprises a lens barrel 4 and the lens 1 described above, the lens 1 is installed in the lens barrel 4, and the tooth-shaped structure 2 is attached to the inner wall of the lens.

[0029] The camera comprises the lens described above.

[0030] The lens, the lens barrel and the camera provided by the utility model have the tooth-shaped structure 2 arranged on the edge of the lens 1, the surface area of the side wall of the edge of the lens 1 is increased, the antireflection film 3 is coated on the surface of the tooth-shaped structure 2, the reflectivity of the stray light of the edge of the lens 1 is reduced through the antireflection film 3, the design of the tooth-shaped structure 2 ensures that the antireflection film 3 on the groove 22 part of the tooth-shaped structure 2 is not damaged when the lens 1 and the lens barrel 4 are assembled, the purpose of reducing the stray light of the edge of the lens 1 is ensured while the assembly effect of the lens 1 is ensured, part of the stray light of the edge of the lens 1 is eliminated, the antireflection effect of the edge of the lens 1 is ensured, the image quality of the camera is improved, the visual recognition effect is enhanced, the precision of measurement and detection is improved, and the visual experience of the user is improved.

[0031] In order for those skilled in the art to better understand the utility model scheme, the technical scheme in the utility model embodiment will be clearly and completely described below in combination with the drawings.

[0032] It should be noted that the embodiments in the utility model and the features and technical schemes in the embodiments can be combined with each other without conflict.

[0033] It should be noted that: similar signs and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0034] Embodiment one

[0035] Please refer to Figures 1-2 The utility model provides a kind of low stray light lens, it includes lens 1, lens 1 is convex lens or concave lens, lens 1 is glass lens 1, plastic lens 1 or quartz lens 1, the edge of lens 1 has tooth-shaped structure 2, tooth-shaped structure 2 is microstructure, size is small, will not affect the light transmission of lens 1 plane, tooth-shaped structure 2 is distributed in the entire side wall of the edge of lens 1, the surface of tooth-shaped structure 2 is coated with antireflection film 3, tooth-shaped structure 2 is arranged around the side wall of lens 1, i.e. the side wall of lens 1 is the tooth-shaped structure 2 of concave-convex structure, further, the shape of lens 1 is rectangle, circle or ellipse, it can also be some other regular or irregular shape, set according to the need of lens.The plane shape of lens 1 in this example is circular.

[0036] Antireflection film 3 is single-layer or multi-layer structure, antireflection film 3 is coated by CVD or ALD, and antireflection film 3 is nanostructure antireflection film 3.

[0037] The tooth structure 2 comprises a plurality of protrusions 21 arranged in a ring array with the center of the lens 1 as the center, and a groove 22 is formed between adjacent protrusions 21. When the lens 1 is assembled into the cylinder, the side wall of the groove 22 will not be damaged by interference. The groove 22 is V-shaped, trapezoidal or other shapes, depending on the shape of the protrusion 21 and the distance between adjacent protrusions 21.

[0038] The protrusion 21 is provided with an arc-shaped section 23, which is arranged on the side of the protrusion 21 away from the lens 1. The arc-shaped section 23 facilitates the fitting with the inner wall of the lens barrel 4. The length of the arc-shaped section 23 accounts for 40%-60% of the circumference of the lens 1, and in this example, it is preferably 50%. This results in the length of the anti-reflection film 3 that can be damaged being 40%-60%, and the length that cannot be damaged being 40%-60%. This also reduces the stray light by 40%-60%.

[0039] The cross-section of the protrusion 21 is one of semicircular, semi-elliptical, parabolic, trapezoidal or triangular. The outermost side is provided with an arc-shaped section 23 with the same center as the lens 1, to facilitate the fitting and installation with the lens barrel 4. In this example, the cross-section of the protrusion 21 is preferably isosceles trapezoidal, and the long base of the isosceles trapezoid is connected to the lens 1. The short base of the isosceles trapezoid is an arc structure, and the curvature of the arc structure is consistent with the curvature of the inner wall of the lens barrel 4 and has the same center. The protrusion 21 with an isosceles trapezoidal cross-section forms a V-shaped or isosceles trapezoidal groove 22, which is specific in structure, facilitates coating, and is convenient for production and preparation.

[0040] Example Two

[0041] Please refer to Figures 3-4 The embodiment provides a lens, which comprises a lens barrel 4 and the lens 1 in the first embodiment, the lens 1 is installed in the lens barrel 4, the tooth structure 2 is fitted with the inner wall of the lens barrel 4, the tooth structure 2 comprises a plurality of protrusions 21 arranged in a ring array with the center of the lens 1 as the center, and a groove 22 is formed between adjacent protrusions 21. The protrusion 21 is provided with an arc-shaped section 23, which is arranged on the side of the protrusion 21 away from the lens 1. The radius of the arc-shaped section 23 is consistent with the radius of the inner wall of the lens barrel 4, and the total length of the arc-shaped section 23 accounts for 40%-60% of the circumference of the inner wall of the lens barrel 4. After the lens 1 is installed into the lens barrel 4, the arc-shaped section 23 interferes with the inner wall of the lens barrel 4, and only the anti-reflection film 3 on the arc-shaped section 23 will be damaged, without damaging the anti-reflection film 3 on the side wall of the groove 22. This eliminates part of the stray light at the edge of the lens 1, ensures the anti-reflection effect at the edge of the lens 1, and the undamaged part accounts for 40%-60%. The intensity of the stray light can be reduced by 40%-60% compared with before.

[0042] Example Three

[0043] The embodiment provides a camera, which comprises the lens in the embodiment two, eliminates part of stray light of the edge of the lens 1, ensures the antireflection effect of the edge of the lens 1, improves the image quality of the camera, enhances the visual recognition effect, improves the measurement and detection precision, and improves the visual experience of a user, and the camera is mainly applied to the fields of electronic equipment, industrial vision, security monitoring, intelligent transportation, medical imaging, automatic driving and intelligent driving assistance, etc.

[0044] The working principle of the lens, the lens and the camera with low stray light provided by the utility model is: according to the conventional process production lens 1, the tooth structure 2 is prepared at the edge (the straight edge) of the lens 1, then the antireflection film 3 is plated by adopting the CVD or ALD mode, then the lens 1 is installed into the lens barrel 4, and the lens is assembled, in the control equipment, the camera is formed, by arranging the tooth structure 2 at the edge of the lens 1, the surface area of the side wall of the edge of the lens 1 is increased, and the antireflection film 3 is plated on the surface of the tooth structure 2, the reflectivity of stray light of the edge of the lens 1 is reduced through the antireflection film 3, the design of the tooth structure 2 does not destroy the antireflection film 3 of the concave groove 22 part on the tooth structure 2 when the lens 1 and the lens barrel 4 are assembled, the purpose of reducing the stray light of the edge of the lens 1 is ensured while the assembly effect of the lens 1 is ensured, part of stray light of the edge of the lens 1 is eliminated, the antireflection effect of the edge of the lens 1 is ensured, the image quality of the camera is improved, the visual recognition effect is enhanced, the measurement and detection precision is improved, and the visual experience of a user is improved.

[0045] In the utility model, unless another definite provision and limitation, the terms "installation", "connection", "connection", "fixation" and the like terms should be broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electric connection or each other can communicate;Can be directly connected, also can be indirectly connected through the intermediate medium, can be the communication or the interaction relationship of two elements in two elements, unless another definite limitation. For ordinary skilled in the art, the above-mentioned terms can be understood according to the specific meaning of the utility model in specific circumstances.

[0046] Obviously, the above-described embodiments are only a part of the embodiments of the present application, rather than all the embodiments, and the preferred embodiments of the present application are given in the drawings, but do not limit the patent scope of the present application. The present application can be realized in many different forms, and conversely, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing specific embodiments, or equivalently replace some of the technical features. Any equivalent structure made by using the content of the present application specification and drawings, directly or indirectly used in other related technical fields, is also within the patent protection scope of the present application.

Claims

1. A low stray light lens comprising a lens, characterized in that, The edge of the lens has a tooth structure, the tooth structure is distributed on the whole side wall of the lens edge, and a surface of the tooth structure is coated with an anti-reflection film.

2. The low ghost image lens of claim 1, wherein, The tooth structure includes a plurality of protrusions, the protrusions are arranged in a ring array with the center of the lens as a circle center, and grooves are formed between adjacent protrusions.

3. The low-prismatic lens of claim 2, wherein, An arc-shaped cutting surface is arranged on the protrusion, and the arc-shaped cutting surface is arranged on a side of the protrusion away from the lens.

4. The low-prismatic lens of claim 3, wherein, The length of the arc-shaped cutting surface accounts for 40%-60% of the circumference of the lens.

5. The low-prismatic lens of claim 2, wherein, The shape of the cross section of the protrusion is one of a semicircle, a semi-ellipse, a parabola, a trapezoid or a triangle.

6. The low ghost image lens of claim 5, wherein, The shape of the cross section of the protrusion is an isosceles trapezoid, a long bottom side of the isosceles trapezoid is connected with the lens, and a short bottom side of the isosceles trapezoid is an arc structure.

7. The low-prismatic lens of claim 1, wherein, The lens is a convex lens or a concave lens.

8. A lens characterized by comprising: The lens includes a lens barrel and the lens according to any one of claims 1-7, the lens is mounted in the lens barrel, and the tooth structure is attached to an inner wall of the lens barrel.

9. A lens according to claim 8, wherein The tooth structure includes a plurality of protrusions, the protrusions are arranged in a ring array with the center of the lens as a circle center, grooves are formed between adjacent protrusions, an arc-shaped cutting surface is arranged on the protrusion, the arc-shaped cutting surface is arranged on a side of the protrusion away from the lens, and a radius of the arc-shaped cutting surface is consistent with a radius of an inner wall of the lens barrel.

10. A camera, characterized by The lens includes the lens barrel according to claim 8.

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