Lenses, lens modules and electronic equipment

Abstract

The present invention relates to the field of camera technology, and specifically discloses a lens, a lens module and an electronic device. The lens comprises: a lens barrel, comprising a barrel body and a shading portion connected to the barrel body, the shading portion extending from the barrel body to the object side; a first lens, comprising an optical portion and a non-optical portion, the non-optical portion being arranged around the periphery of the optical portion, and the optical portion having a conical side surface, the first lens being mounted at one end of the barrel body close to the object side, the shading portion being arranged around the optical portion; wherein the angle A3 between the conical side surface and the axis of the barrel body is 10° to 20°. The lens in the present invention can improve the stray light of the first lens, and the head of the lens can be designed to be smaller, and it is also convenient to improve the production efficiency, yield rate and imaging quality of the lens.

Description

Technical Field

[0001] The present invention relates to the field of camera technology, and in particular to a lens, a lens module and an electronic device. Background Art

[0002] In recent years, the full-screen craze has become a basic configuration for mobile phones, and camera solutions are also constantly innovating and breaking through.

[0003] Currently, the depth from the object side of the first lens of a small-head lens to the center of the aspherical surface of the object side is increased, and the diameter of the lens is almost equal to the effective imaging area of ​​the aspherical surface to achieve the purpose of a small head, which causes light to easily hit the side wall and produce serious stray light. Summary of the invention

[0004] The invention discloses a lens, a lens module and an electronic device. The lens can improve the stray light of a first lens, and the head of the lens can be designed to be smaller, and the production efficiency, yield rate and imaging quality of the lens can be improved.

[0005] In order to achieve the above object, an embodiment of the present invention discloses a lens, comprising:

[0006] A lens barrel, the lens barrel comprising a barrel body and a light shielding portion connected to the barrel body, the light shielding portion extending from the barrel body toward the object side; and

[0007] A lens group, the lens group includes a first lens, the first lens includes an optical part and a non-optical part, the non-optical part is arranged around the periphery of the optical part, the cross-sectional area of ​​the optical part gradually increases from the object side to the image side, and the optical part has a tapered side surface, and the first lens is installed at one end of the barrel close to the object side, and the light shielding part is arranged around the optical part;

[0008] Wherein, the angle A3 between the conical side surface and the axis of the cylinder is 10° to 20°.

[0009] When the angle A3 is less than 10°, the cone side surface is more parallel to the optical axis of the lens, and the incident stray light is easily hit on the cone side surface of the optical part after being refracted by the optical part, and the reflected light of the stray light is easily shot into the effective imaging area of ​​the photosensitive chip. At this time, a light spot is likely to appear on the image plane of the lens. In addition, when the angle A3 is less than 10°, the optical part is more inclined to be set in a straight cylindrical shape. In the actual processing of the first lens, the friction between the optical part and the mold is greater when it is demolded, which is easy to damage the first lens, and it is not easy to demold, and the production yield is low.

[0010] When the angle A3 is greater than 10°, the conical side surface of the optical part is too inclined, and the effective aperture of the image side surface of the first lens will be too large, which is not conducive to the design of a small lens head and thus cannot meet the requirements of small openings of electronic devices such as mobile phone panels.

[0011] That is to say, the present invention can not only improve the production yield of the first lens and the imaging quality of the lens by making the angle A3 between the conical side surface of the optical part and the axis of the barrel within the range of 10° to 20°, but also facilitate the small head design of the lens, thereby meeting the design requirements of small openings and high screen-to-body ratios of electronic products.

[0012] As an optional implementation, in an embodiment of the present invention, the thickness A5 of the first lens on the optical axis of the lens is 1 mm to 1.5 mm. When the center thickness A5 of the first lens is greater than 1.5 mm, the thickness ratio of the optical part and the non-optical part will be increased, and a weld line will be easily generated, making the processing of the first lens difficult and difficult to form. When the center thickness A5 of the first lens is less than 1 mm, it does not meet the requirements of the under-screen design, and the front end of the lens cannot be completely accommodated in the hole under the screen, which is not convenient for realizing the small head design of the lens.

[0013] As an optional implementation, in an embodiment of the present invention, the shading portion is an annular shading portion, which is surrounded by a conical cavity that is compatible with the conical side surface of the optical portion, so as to facilitate the installation and positioning of the first lens and block stray light from the outside.

[0014] As an optional implementation, in an embodiment of the present invention, a light-through hole is provided at one end of the light-shielding portion close to the object side, the light-through hole is connected to the conical cavity, an annular inner flange is provided on the inner wall surface of the light-through hole, the protrusion direction of the annular inner flange is perpendicular to the optical axis of the lens, and the protrusion height A2 of the annular inner flange in the direction perpendicular to the optical axis of the lens is 0.02mm to 0.15mm. When the protrusion height A2 of the annular inner flange is less than 0.02mm, stray light directed to the lens is likely to be directed to the conical side surface of the optical portion, and after being reflected by the conical side surface, it is more likely to be directed to the effective imaging area of ​​the photosensitive chip, and light spots are more likely to appear on the image plane of the lens; when the protrusion height A2 of the annular inner flange is greater than 0.15mm, the size of the first lens will be increased, thereby increasing the size of the lens head, making it difficult to achieve a small head design of the lens.

[0015] As an optional implementation, in an embodiment of the present invention, the optical part also has an object side surface, and the vertical distance from the end of the annular inner flange close to the optical axis of the lens to the object side surface is A1, and A1 is 0.001mm to 0.02mm. When the size of A1 is less than 0.001mm, the distance between the annular inner flange and the object side surface of the first lens is very close. During the assembly process, the annular inner flange of the lens barrel is likely to interfere with the first lens, and it is easy to cause wear on the object side surface of the first lens; when the size of A1 is greater than 0.02mm, stray light directed to the lens is likely to be directed to the conical side surface of the optical part, and after being reflected by the conical side surface, it is more likely to be directed to the effective imaging area of ​​the photosensitive chip, and the imaging of the lens is more likely to have a light spot.

[0016] As an optional implementation, in an embodiment of the present invention, the distance between one end of the annular inner flange close to the lens optical axis and one end of the conical side surface close to the lens object side in the direction of the lens optical axis is A4, and the thickness of the first lens on the lens optical axis is A5, wherein the ratio of A4 / A5 is 0.3 to 0.7. When the ratio A4 / A5 between A4 and A5 is greater than 0.7, the incident stray light is directed toward the optical part and easily hits the conical side surface of the optical part after being refracted by the optical part, and the reflected light of the stray light is easily projected into the effective imaging area of ​​the photosensitive chip, and a light spot is easily formed on the image plane of the lens. When the ratio A4 / A5 between A4 and A5 is less than 0.3, the distance between the conical side surface in the direction of the optical axis is relatively short, which affects the depth of the small head of the lens.

[0017] As an optional implementation, in an embodiment of the present invention, in the direction close to the central axis of the lens barrel, the width of the annular inner flange in the direction of the optical axis gradually decreases to zero, that is, the portion of the annular inner flange close to the optical axis of the lens is relatively sharp, preventing the outer surface of the annular inner flange from affecting the light path of stray light, thereby preventing stray light from being directed to the image plane of the lens.

[0018] As an optional implementation, in an embodiment of the present invention, the longitudinal section of the annular inner flange is a triangle, and the triangle has an angle A6 set close to the optical axis of the lens, wherein 50°<A6<135°, which is conducive to the forming of the sharp corner of the light hole, making it dimensional stable and avoiding unstable state caused by stray light.

[0019] According to another aspect of the present invention, a lens module is provided, the lens module comprising the above-mentioned lens and a photosensitive chip, wherein the photosensitive chip is arranged on the image side of the lens.

[0020] According to a third aspect of the present invention, an electronic device is provided, comprising the above-mentioned lens module.

[0021] Compared with the prior art, the lens, lens module and electronic device of the present invention have at least the following beneficial effects:

[0022] According to an embodiment of the present invention, by limiting the size of the lens, the stray light of the first lens can be improved. Specifically, when the angle A3 is less than 10°, the conical side surface is more inclined to be parallel to the optical axis of the lens, and the incident stray light is directed to the optical part and easily hits the conical side surface of the optical part after being refracted by the optical part, and the reflected light of the stray light is easily shot into the effective imaging area of ​​the photosensitive chip. At this time, a light spot is likely to appear on the image plane of the lens. In addition, when the angle A3 is less than 10°, the optical part is more inclined to be set in a straight cylindrical shape. In the actual processing of the first lens, the friction between the optical part and the mold is greater when the optical part is demolded, which is easy to cause damage to the first lens, and it is not easy to demold, and the production yield is low. When the angle A3 is greater than 20°, the conical side surface of the optical part is too inclined, and the effective aperture of the image side surface of the first lens will be too large, which is not conducive to the design of a small head of the lens, and thus cannot meet the requirements of small openings of electronic devices such as mobile phone panels. That is to say, the present invention can not only improve the production yield of the first lens and the imaging quality of the lens by making the angle A3 between the conical side surface of the optical part and the axis of the barrel within the range of 10° to 20°, but also facilitate the small head design of the lens, thereby meeting the design requirements of small openings and high screen-to-body ratios of electronic products. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 is a cross-sectional view of a lens disclosed in an embodiment of the present invention;

[0025] Figure 2 is a cross-sectional view of a lens barrel of a lens disclosed in an embodiment of the present invention;

[0026] Figure 3 is a front view of a first lens of a lens disclosed in an embodiment of the present invention;

[0027] Figure 4 is a stray light trend diagram when the A3 of the lens disclosed in the embodiment of the present invention is less than 10°;

[0028] Figure 5 yes Figure 4 A magnified view of the M region in FIG.

[0029] Figure 6is a diagram showing the direction of stray light inside the lens when the A3 of the lens disclosed in the embodiment of the present invention is less than 10°;

[0030] Figure 7 is an image plane diagram when A3 of the lens disclosed in the embodiment of the present invention is less than 10°;

[0031] Figure 8 is a stray light trend diagram when A4 / A5 of the lens disclosed in the embodiment of the present invention is greater than 0.7;

[0032] Fig. 9 yes Figure 8 Enlarged view of the middle N region;

[0033] Fig.10 is a stray light trend diagram when the size of A2 of the lens disclosed in the embodiment of the present invention is less than 0.02 mm;

[0034] Fig.11 yes Fig.10 A magnified view of the P region in FIG.

[0035] Fig.12 is a diagram showing the direction of stray light inside the lens when the size of A2 of the lens disclosed in the embodiment of the present invention is less than 0.02 mm;

[0036] Fig.13 is an enlarged view of stray light when the size of A2 of the lens disclosed in the embodiment of the present invention is less than 0.02 mm;

[0037] Fig.14 is an image plane diagram when the size of A2 of the lens disclosed in the embodiment of the present invention is less than 0.02 mm;

[0038] Fig.15 is a stray light trend diagram when the A1 size of the lens disclosed in the embodiment of the present invention is greater than 0.02 mm;

[0039] Fig.16 yes Fig.15 A magnified view of the Q region in FIG.

[0040] Fig.17 It is a front view of an electronic device disclosed in an embodiment of the present invention.

[0041] Icons: 10, lens barrel; 11, barrel body; 12, shading portion; 121, annular inner flange; 122, conical cavity; 123, light hole; 124, stop step; 20, first lens; 21, optical portion; 211, object side surface; 212, conical side surface; 213, image side surface; 22, non-optical portion; 30, shading sheet; 200, lens module; 300, electronic device; 301, housing. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] In the present invention, the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like are based on the directions or positional relationships shown in the drawings. These terms are mainly used to better describe the present invention and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific direction, or to be constructed and operated in a specific direction.

[0044] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those skilled in the art, the specific meanings of these terms in the present invention can be understood according to specific circumstances.

[0045] In addition, the terms "installed", "set", "provided with", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0046] In addition, the terms "first", "second", etc. are mainly used to distinguish different devices, elements or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise specified, "plurality" means two or more.

[0047] The following is a detailed description with reference to the accompanying drawings.

[0048] Embodiment 1

[0049] See also Figures 1 to 3 As shown, Figure 1 is a cross-sectional view of the lens disclosed in this embodiment, Figure 2 is a cross-sectional view of the lens barrel disclosed in this embodiment, Figure 3 1 is a front view of the first lens disclosed in this embodiment. The lens in this embodiment includes a lens barrel 10 and a lens group.

[0050] Specifically, the lens barrel 10 includes a barrel body 11 and a light shielding portion 12 connected to the barrel body 11, and the light shielding portion 12 extends from the barrel body 11 to the object side; the lens group includes a first lens 20, and the first lens 20 includes an optical portion 21 and a non-optical portion 22, and the non-optical portion 22 is arranged around the outer periphery of the optical portion 21, and the cross-sectional area of ​​the optical portion 21 gradually increases from the object side to the image side, and the optical portion 21 has a tapered side surface 212, and the first lens 20 is installed at one end of the barrel body 11 close to the object side, and the light shielding portion 12 is arranged around the optical portion 21. Among them, the angle A3 between the tapered side surface 212 and the axis of the barrel body 11 is 10° to 20°, for example, 10°, 12°, 14°, 16°, 18° or 20°, etc.

[0051] When the angle A3 is less than 10°, the conical side surface 212 is more parallel to the optical axis of the lens, and the incident stray light is easily hit on the conical side surface 212 of the optical portion 21 after being directed toward the optical portion 21 and refracted by the optical portion 21, and the reflected light of the stray light is easily hit in the effective imaging area of ​​the photosensitive chip (see 4 and Figure 5 As shown in Figure 2), at this time, the stray light in the lens moves as follows: Figure 6 As shown in the dotted box in the figure, the image plane of the lens is prone to appear as follows Figure 7 In addition, when the angle A3 is less than 10°, the optical portion 21 tends to be set in a straight cylindrical shape. In the actual processing of the first lens 20, the friction between the optical portion 21 and the mold is greater when the first lens 20 is demolded, which is easy to cause damage to the first lens 20, making it difficult to demold, and the production yield is low.

[0052] When the angle A3 is greater than 20°, the conical side surface 212 of the optical portion 21 is too inclined, and the effective aperture of the image side surface 213 of the first lens 20 will be too large, which is not conducive to realizing the design of a small lens head, and thus cannot meet the requirements of small openings of electronic devices such as mobile phone panels.

[0053] That is to say, the present invention can not only improve the production yield of the first lens 20 and the imaging quality of the lens by making the angle A3 between the conical side surface 212 of the optical portion 21 and the axis of the barrel 11 within the range of 10° to 20°, but also facilitate the realization of a small head design of the lens, thereby meeting the design requirements of small openings and high screen-to-body ratios of electronic products.

[0054] Furthermore, the thickness A5 of the first lens 20 on the optical axis of the lens is 1 mm to 1.5 mm, such as 1 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm or 1.5 mm. When the thickness A5 of the first lens 20 on the optical axis of the lens is greater than 1.5 mm, the thickness ratio of the optical portion 21 and the non-optical portion 22 will be increased, and a weld line will be easily generated, making the processing of the first lens 20 difficult and difficult to form. When the thickness A5 of the first lens 20 on the optical axis of the lens is less than 1 mm, it does not meet the requirements of the under-screen design, and the front end of the lens cannot be completely accommodated in the hole under the screen.

[0055] Further, the shading portion 12 in the present embodiment is an annular shading portion, which can be surrounded by a conical cavity 122 that is adapted to the conical side surface 212 of the optical portion 21. Through the effect of the conical cavity 122, it is convenient to accommodate the optical portion 21 of the first lens 20, and the conical cavity 122 and the conical side surface 212 of the optical portion 21 are adapted to improve the close contact between the two, which is convenient for further reducing the head size of the lens, and is convenient for realizing the full-screen design of electronic devices such as mobile phones and wearable devices. It can be understood that the central axis of the optical portion 21 of the present invention coincides with the optical axis of the lens. In an embodiment, the overall thickness of the optical portion 21 of the first lens 20 is greater than the thickness of the optical portion of a conventional lens. The central thickness of the optical portion 21 of the first lens 20 is large, so that the optical portion 21 can form a conical side surface 212 connected to the object side surface 211, and then the shading portion 12 of the lens barrel 10 can surround the conical side surface 212, thereby surrounding the optical portion 21, which is convenient for realizing the shading function.

[0056] like Figures 1 to 3 As shown, the lens barrel 10 in this embodiment is provided with a light-through hole 123, which is communicated with the tapered cavity 122, and a stop step 124 is provided on the inner wall surface of the lens barrel 10. When actually installed, the optical portion 21 of the first lens 20 is installed in the light-through hole 123, which is convenient for processing the light entering from the light-through hole 123, and the non-optical portion 22 of the first lens 20 is stopped on the stop step 124 at the light-through hole 123, which is convenient for limiting and installing the first lens 20. Specifically, the first lens 20 can be fixed on the stop step 124 by adhesive or the like, and the structure is simple and easy to install. When actually assembled, the first lens 20 is placed in the tapered cavity 122 of the lens barrel 10, and the adhesive is injected into the gap between the lens barrel 10 and the first lens 20 to be cured to bond the first lens 20 and the lens barrel 10, which is simple and convenient. The adhesive can be an optical adhesive (OCA), such as organic silicone, acrylic resin, unsaturated polyester, polyurethane, epoxy resin and other adhesives.

[0057] Optionally, in this embodiment, the cross-section of the light hole 123 is circular. In other embodiments, the cross-section of the light hole 123 may also be rectangular, elliptical, or polygonal. The cross-sectional shape of the light hole 123 corresponds to the cross-sectional shape of the light shielding portion 12. For example, when the cross-sectional shape of the light shielding portion 12 is circular, the cross-sectional shape of the light hole 123 is circular.

[0058] The barrel 11 and the shading portion 12 in the present embodiment are integrally formed, with high structural strength and good stability. Specifically, the barrel 11 and the shading portion 12 can be integrally formed by injection molding, and can also be processed and molded by technologies such as 3D printing. In some embodiments of the present invention, the lens barrel 10 is made of plastic material. It is understandable that the lens barrel 10 can be formed by injection molding after baking and hot melting using plastic material (such as black plastic material L-1225Y). Since the plastic material has a low strength, in order to ensure the stability of the lens barrel 10, the minimum wall thickness T of the lens barrel 10 is 0.25mm. In other embodiments, the lens barrel 10 can be made of metal material. Since the metal material has a high strength, the wall thickness of the lens barrel 10 can be made thinner.

[0059] Optionally, in other embodiments of the present invention, the cylinder 11 and the shading portion 12 can be separately arranged and then assembled into one. Specifically, the cylinder 11 and the shading portion 12 can be separately arranged and then welded into one, or fixed together by snaps, screws, pins, rivets and other structures. As long as other deformation methods are based on the conception of the present invention, they are within the protection scope of the present invention.

[0060] Furthermore, an annular inner flange 121 is provided on the inner wall surface of the light-through hole 123, the protruding direction of the annular inner flange 121 is perpendicular to the optical axis of the lens, and the annular inner flange 121 protrudes in a direction perpendicular to the optical axis of the lens, and the distance from the end of the annular inner flange 121 close to the optical axis of the lens to the end of the conical side surface 212 close to the object side of the lens in the direction of the optical axis of the lens is A4, wherein the ratio of A4 / A5 is 0.3 to 0.7, such as 0.3, 0.4, 0.5, 0.6 or 0.7. If the ratio A4 / A5 between A4 and A5 is greater than 0.7, the incident stray light is directed toward the optical part 21 and is easily hit on the conical side surface 212 of the optical part 21 after being refracted by the optical part 21, and the reflected light of the stray light is easily hit in the effective imaging area of ​​the photosensitive chip (see 8 and Fig. 9As shown in the figure, a light spot is likely to appear on the image plane of the lens. If the ratio A4 / A5 between A4 and A5 is less than 0.3, the distance between the cone side surface 212 and the optical axis direction is relatively short, which affects the depth of the small head of the lens. In addition, in the actual processing of the first lens 20, the thickness of the non-optical part 22 on the optical axis is more moderate than the thickness of the optical part 21, so that the shrinkage ratio of the plastic in each part of the optical part 21 and the non-optical part 22 can be as similar as possible, which can reduce the difference between the aspherical shape of the first lens 20 and the design value, thereby ensuring the production yield of the first lens 20 and the imaging quality of the lens.

[0061] Furthermore, the protrusion height A2 of the annular inner flange 121 in the direction perpendicular to the optical axis of the lens is 0.02 mm to 0.15 mm, for example, 0.02 mm, 0.05 mm, 0.08 mm, 0.12 mm or 0.15 mm. When the protrusion height A2 of the annular inner flange 121 is less than 0.02 mm, stray light directed toward the lens is easily directed toward the tapered side surface 212 of the optical portion 21 (see Fig.10 and Fig.11 As shown in FIG. 1 , after being reflected by the conical side surface 212, it is easier to be directed to the effective imaging area of ​​the photosensitive chip. At this time, the direction of the stray light in the lens barrel 10 is as follows: Fig.12 and Fig.13 As shown in the dotted box, the image plane of the lens is more likely to appear Fig.14 For the light spot shown, when the protruding height A2 of the annular inner flange 121 is greater than 0.15 mm, the size of the first lens 20 will be increased, thereby increasing the size of the lens head, making it difficult to achieve a small head design of the lens.

[0062] Furthermore, the vertical distance from the end of the annular inner flange 121 close to the lens optical axis to the object side surface 211 is A1, and A1 is 0.001mm to 0.02mm, such as 0.005mm, 0.01mm, 0.015mm or 0.02mm. When the size of A1 is less than 0.001mm, the distance between the annular inner flange 121 and the object side surface 211 of the first lens 20 is very close. During the assembly process, the annular inner flange 121 of the lens barrel 10 is likely to interfere with the first lens 20, and the object side surface 211 of the first lens 20 is likely to be worn. When the size of A1 is greater than 0.02mm, the stray light directed to the lens is likely to be directed to the conical side surface 212 of the optical portion 21. At this time, the direction of the stray light in the lens barrel 10 is as follows: Fig.15 and Fig.16 As shown, after being reflected by the conical side surface 212 of the optical part 21, it is easier to be projected into the effective imaging area of ​​the photosensitive chip, and the imaging of the lens is more likely to appear as shown in FIG. Fig.14 spot of light.

[0063] As an optional embodiment, the width of the annular inner flange 121 in the direction of the lens optical axis gradually decreases to zero, that is, the portion of the annular inner flange 121 close to the lens optical axis is relatively sharp, thereby preventing the outer surface of the annular inner flange 121 from affecting the light path of stray light, thereby preventing stray light from being directed to the image plane of the lens.

[0064] Optionally, the longitudinal section of the annular inner flange 121 is a triangle, and the triangle has an angle A6 set close to the optical axis of the lens, wherein 50°<A6<135°, such as 60°, 90° or 120°, etc., is conducive to the formation of the sharp corners of the light hole 123, making its size stable and avoiding the unstable state of stray light. It can be understood that the longitudinal section of the annular inner flange 121 here refers to the section obtained by vertically cutting the annular inner flange 121 along a plane parallel to the optical axis of the lens and passing through the optical axis. Of course, in other embodiments of the present invention, the longitudinal section of the annular inner flange 121 can also be other special-shaped structures with sharp corners close to the end of the optical axis of the lens.

[0065] Optionally, the object side surface 211 in this embodiment is convex at the lens optical axis. The optical portion 21 also has an image side surface 213, which is convex at the lens optical axis. The object side surface 211 and the image side surface 213 of the first lens 20 in this embodiment are both convex, which is conducive to correcting edge aberrations, improving imaging resolution, focusing the incident light beam, and effectively transmitting the image information collected by the lens to the image plane.

[0066] In some optional embodiments of the present invention, the lens group includes a second lens, a third lens, etc. in addition to the first lens 20, and can be specifically designed according to the imaging requirements of the lens. Exemplarily, in this embodiment, the first lens 20, the second lens, and the third lens can be plastic lenses, or glass lenses, etc. In the present invention, plastic is preferably used to make the first lens 20, which has a simple structure and is easy to mold and process. Optionally, the first lens 20 can be made of polymethyl methacrylate (PMMA) or polycarbonate (PC). Since polymethyl methacrylate materials and polycarbonate materials are easily deformed when cut. Therefore, the first lens 20 is formed by injection molding, which can avoid forming the first lens 20 by cutting part of the material. The first lens 20, the second lens, and the third lens can be set to a circular shape, or a square or other special-shaped structure.

[0067] Furthermore, the lens of the present invention includes a light shielding sheet 30, which is annular and disposed between any two adjacent lenses. In some embodiments of the present invention, the light shielding sheet 30 is disposed inside the barrel 11 and located on the surface of the non-optical portion 22 close to the image side, so that the incident light can only pass through the optical portion 21 of the first lens 20, preventing stray light from affecting the imaging quality.

[0068] Furthermore, the lens of the present invention further comprises a spacer ring (not shown). The spacer ring is arranged between any two adjacent lenses. Thus, the spacer ring can be used to set the interval between the two adjacent lenses as required.

[0069] In summary, the lens of the present invention can improve the stray light of the first lens 20, and the head of the lens can be designed to be smaller, which is convenient for improving the production efficiency, yield rate and imaging quality of the lens. When the lens of the present application is applied to the front camera module of an electronic device, the opening of the screen of the electronic device can be reduced while ensuring the field of view FOV of the lens and the shooting effect, thereby increasing the screen-to-body ratio.

[0070] Embodiment 2

[0071] The present invention also provides a lens module, which includes a photosensitive chip and the above-mentioned lens, and the photosensitive chip is arranged on the image side of the lens. The angle A3 between the conical side surface of the lens of the lens module of the present application and the axis of the barrel is 10° to 20°. The present invention makes the angle A3 between the conical side surface 212 of the optical part 21 and the axis of the barrel 11 to be 10° to 20°, which can not only improve the production yield of the first lens 20 and the imaging quality of the lens, but also facilitate the realization of the small head design of the lens, thereby meeting the design requirements of small openings and full screens of electronic products. When the lens of the present application is applied to the front camera module of an electronic device, the opening of the screen of the electronic device can be reduced while ensuring the field of view FOV of the lens and the shooting effect, thereby increasing the screen-to-body ratio.

[0072] Embodiment 3

[0073] See also Fig.17 As shown, the present invention provides an electronic device 300, which can be, for example, a mobile phone, a tablet computer, a laptop computer, a phone watch or other wearable device. The electronic device includes a lens module 200 and a shell 301, and the lens module 200 is arranged in the shell 301.

[0074] The angle A3 between the conical side surface 212 of the lens of the lens module of the present application and the axis of the barrel 11 is 10° to 20°. By making the angle A3 between the conical side surface 212 of the optical part 21 and the axis of the barrel 11 10° to 20°, the present invention can not only improve the production yield of the first lens 20 and the imaging quality of the lens, but also facilitate the small head design of the lens, thereby meeting the design requirements of small openings and full screens of electronic products. The electronic device of the present application can reduce the opening of the screen of the electronic device 300 while ensuring the field of view FOV of the lens and the shooting effect, thereby increasing the screen-to-body ratio.

[0075] The lens, lens module and electronic device disclosed in the embodiments of the present invention are introduced in detail above. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the lens, lens module and electronic device of the present invention and their core ideas. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scopes. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A lens, characterized in that: include: A lens barrel, the lens barrel comprising a barrel body and a light shielding portion connected to the barrel body, the light shielding portion extending from the barrel body to the object side; as well as A lens group, the lens group includes a first lens, the first lens includes an optical part and a non-optical part, the non-optical part is arranged around the periphery of the optical part, the cross-sectional area of ​​the optical part gradually increases from the object side to the image side, and the optical part has a tapered side surface, the first lens is installed at one end of the barrel close to the object side, and the light shielding part is arranged around the optical part; The shading portion is an annular shading portion, and the annular shading portion surrounds a conical cavity adapted to the conical side surface of the optical portion; A light-through hole is provided at one end of the light-shielding portion close to the object side, the light-through hole is connected to the conical cavity, and an annular inner flange is provided on the inner wall surface of the light-through hole; Among them, the angle A3 between the conical side surface and the axis of the barrel is 10° to 20°, the distance from one end of the annular inner flange close to the lens optical axis to the end of the conical side surface close to the object side of the lens in the direction of the lens optical axis is A4, the thickness of the first lens on the lens optical axis is A5, and the ratio of A4 / A5 is 0.3 to 0.

7.

2. The lens according to claim 1, characterized in that: The thickness A5 of the first lens on the lens optical axis is 1 mm to 1.5 mm.

3. The lens according to claim 1, characterized in that: The protruding direction of the annular inner flange is perpendicular to the optical axis of the lens, and the protruding height A2 of the annular inner flange along the direction perpendicular to the optical axis of the lens is 0.02 mm to 0.15 mm.

4. The lens according to claim 3, characterized in that: The optical part also has an object side surface, and a vertical distance from one end of the annular inner flange close to the lens optical axis to the object side surface is A1, and A1 is 0.001 mm to 0.02 mm.

5. The lens according to claim 3, characterized in that: In a direction close to the central axis of the lens barrel, the width of the annular inner flange in the direction of the optical axis gradually decreases to zero.

6. The lens according to claim 3, characterized in that: The longitudinal section of the annular inner flange is a triangle, and the triangle has an angle A6 arranged close to the optical axis of the lens, wherein 50°<A6<135°.

7. A lens module, characterized in that: The lens module comprises the lens and a photosensitive chip according to any one of claims 1 to 6, and the photosensitive chip is arranged on the image side of the lens.

8. An electronic device, characterized in that: The electronic device comprises the lens module described in claim 7.

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