CN112526712A - Lens, lens module and electronic equipment - Google Patents

Abstract

The invention relates to the technical field of camera shooting, and particularly discloses a lens, a lens module and electronic equipment. The lens barrel includes: the lens cone comprises a cylinder body and a shading part connected with the cylinder body, wherein the shading part extends from the cylinder body to the object side; the first lens comprises an optical part and a non-optical part, the non-optical part is arranged around the periphery of the optical part, the optical part is provided with a conical side surface, the first lens is mounted at one end of the cylinder body close to the object side, and the light shielding part is arranged around the optical part; wherein, the included angle A3 between the cone side surface and the axis of the cylinder body is 10-20 degrees. The lens can improve the stray light of the first lens, can design the head of the lens to be smaller, and is convenient for improving the production efficiency, the yield and the imaging quality of the lens.

Description

Lens, lens module and electronic equipment

Technical Field

The present invention relates to the field of camera technologies, and in particular, to a lens, a lens module, and an electronic device.

Background

In recent years, the comprehensive heat shielding trend becomes the basic configuration of the mobile phone, and the camera scheme is continuously innovated and broken through.

At present, the depth from the object side surface of the first lens of the small-head lens to the center of the aspheric surface of the object side surface is made large, and the diameter of the lens is almost equal to the size of the effective imaging area of the aspheric surface, so that the purpose of small head is achieved, and light rays are easy to hit the side wall to generate serious stray light.

Disclosure of Invention

The invention discloses a lens, a lens module and an electronic device, wherein the lens can improve stray light of a first lens, can design the head of the lens to be smaller, and is convenient for improving the production efficiency, the yield and the imaging quality of the lens.

In order to achieve the above object, an embodiment of the present invention discloses a lens barrel, including:

the lens barrel comprises a barrel body and a shading part connected with the barrel body, wherein the shading part extends from the barrel body to an object side; and

the lens group comprises a first lens and a second lens, wherein the first lens comprises an optical part and a non-optical part, the non-optical part is arranged around the periphery of the optical part, the cross section area of the optical part is gradually increased along the direction from an object side to an image side, the optical part is provided with a conical side face, the first lens is mounted at one end, close to the object side, of the cylinder, and a shading part is arranged around the optical part;

wherein an included angle A3 between the cone side face and the axis of the cylinder body is 10-20 degrees.

When the included angle A3 is smaller than 10 degrees, the cone side surface tends to be parallel to the optical axis of the lens, incident stray light irradiates the optical part and is refracted by the optical part and then easily strikes the cone side surface of the optical part, reflected light of the stray light easily strikes an effective imaging area of the photosensitive chip, and at the moment, light spots are easily generated on an image surface of the lens. In addition, when the included angle a3 is smaller than 10 °, the optical portion tends to be in a straight cylindrical shape, and in the actual processing of the first lens, the friction between the optical portion and the mold is larger when the optical portion is ejected, so that the first lens is easily damaged, the mold is not easily released, and the production yield is low.

When the included angle a3 is greater than 10 °, the cone side surface of the optical portion is too inclined, and the effective aperture of the image side surface of the first lens is too large, which is not favorable for realizing the design of a small head of a lens, and further cannot meet the requirement of a small opening of an electronic device such as a mobile phone panel.

That is, according to the invention, the included angle a3 between the cone side surface of the optical part and the axis of the barrel is in the range of 10 ° to 20 °, so that the production yield of the first lens and the imaging quality of the lens can be improved, the small head design of the lens is facilitated, and the design requirements of small opening and high screen ratio of electronic products and the like can be met.

As an alternative implementation manner, in an embodiment of the invention, a thickness a5 of the first lens on the optical axis of the lens is 1mm to 1.5 mm. When the center thickness a5 of the first lens is larger than 1.5mm, the thickness ratio of the optical portion and the non-optical portion is increased, and the weld line is easily generated, making the first lens difficult to process and difficult to mold. When the central thickness a5 of the first lens is smaller than 1mm, the requirement of the design under the screen is not met, and the front end of the lens cannot be completely accommodated in the hole under the screen, so that the small head design of the lens is not convenient to realize.

As an optional implementation manner, in an embodiment of the present invention, the light shielding portion is an annular light shielding portion, and a tapered cavity matched with a tapered side surface of the optical portion is formed around the annular light shielding portion, so that the first lens is convenient to mount and position, and stray light from the outside is shielded.

As an optional implementation manner, in an embodiment of the present invention, a light passing hole is disposed at one end of the light shielding portion close to the object side, the light passing hole communicates with the tapered cavity, an inner side wall surface of the light passing hole is provided with an annular inner flange, a protruding direction of the annular inner flange is perpendicular to the optical axis of the lens, and a protruding height a2 of the annular inner flange along a direction perpendicular to the optical axis of the lens is 0.02mm to 0.15 mm. When the size of the projection height A2 of the annular inner flange is smaller than 0.02mm, stray light emitted to the lens is easy to emit to the side face of the cone of the optical part and is easier to emit to the effective imaging area of the photosensitive chip after being reflected by the side face of the cone, and light spots are easier to appear on the image surface of the lens; when the projection height a2 of the annular inner flange is greater than 0.15mm in size, the size of the first lens is increased, thereby increasing the size of the lens head, making it difficult to achieve a small head design of the lens.

As an alternative implementation manner, in an embodiment of the present invention, the optical portion further has an object-side surface, a perpendicular distance from one 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 0.02 mm. 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, and the annular inner flange of the lens barrel is easy to interfere with the first lens in the assembling process, so that the object-side surface of the first lens is easy to wear; when the size of the A1 is larger than 0.02mm, stray light emitted to the lens is easy to emit to the conical side surface of the optical part, is easy to emit to the effective imaging area of the photosensitive chip after being reflected by the conical side surface, and light spots are easy to appear in the imaging of the lens.

As an alternative implementation manner, in an embodiment of the invention, a distance between one end of the annular inner flange close to the lens optical axis and one end of the cone side surface close to the lens object side in the lens optical axis direction is a4, and a thickness of the first lens element on the lens optical axis is a5, where a ratio of a4/a5 is 0.3 to 0.7. When the ratio A4/A5 between A4 and A5 is greater than 0.7, incident stray light is emitted to the optical part and refracted by the optical part and then easily strikes on the conical side face of the optical part, reflected light rays of the stray light are easily emitted into an effective imaging area of the photosensitive chip, and light spots are easily generated on an image plane of the lens. When the ratio a4/a5 between a4 and a5 is less than 0.3, the distance of the taper side surface in the optical axis direction is relatively short, affecting the depth of the lens small head.

As an optional implementation manner, in an embodiment of the present invention, in a direction close to the central axis of the lens barrel, a width of the annular inner flange in the optical axis direction gradually decreases to zero, that is, a portion of the annular inner flange close to the optical axis of the lens is relatively sharp, so as to prevent an outer surface of the annular inner flange from affecting a light path direction of stray light, and further prevent the stray light from being emitted to an image plane of the lens.

As an alternative implementation manner, in the embodiment of the present invention, the longitudinal section of the annular inner flange is a triangle, and the triangle has an included angle a6 arranged close to the optical axis of the lens, wherein 50 ° < a6 < 135 °, so as to facilitate the formation of the sharp angle of the light-transmitting hole, stabilize the size of the light-transmitting hole, and avoid the unstable state of stray light.

According to another aspect of the present invention, a lens module is provided, which includes the lens and a photo sensor chip disposed on an image side of the lens.

According to a third aspect of the present invention, an electronic apparatus is provided, which includes the lens module set described above.

Compared with the prior art, the lens module and the electronic equipment at least have the following beneficial effects:

according to the embodiment of the present invention, by limiting the size of the lens barrel, the flare of the first lens can be improved. Specifically, when the included angle a3 is smaller than 10 °, the cone side surface tends to be more parallel to the optical axis of the lens, incident stray light is emitted to the optical portion and refracted by the optical portion, and then the incident stray light is likely to strike the cone side surface of the optical portion, and reflected light of the stray light is likely to be emitted in the effective imaging area of the photosensitive chip, and at this time, light spots are likely to appear on the image surface of the lens. In addition, when the included angle a3 is smaller than 10 °, the optical portion tends to be in a straight cylindrical shape, and in the actual processing of the first lens, the friction between the optical portion and the mold is larger when the optical portion is ejected, so that the first lens is easily damaged, the mold is not easily released, and the production yield is low. When the included angle a3 is greater than 20 °, the cone side surface of the optical portion is too inclined, and the effective aperture of the image side surface of the first lens is too large, which is not favorable for realizing the design of a small head of a lens, and further cannot meet the requirement of a small opening of an electronic device such as a mobile phone panel. That is, according to the invention, the included angle a3 between the cone side surface of the optical part and the axis of the barrel is in the range of 10 ° to 20 °, so that the production yield of the first lens and the imaging quality of the lens can be improved, the small head design of the lens is facilitated, and the design requirements of small opening and high screen ratio of electronic products and the like can be met.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a sectional view of a lens barrel disclosed in an embodiment of the present invention;

fig. 2 is a sectional view of a lens barrel of the lens barrel disclosed in the embodiment of the present invention;

fig. 3 is a front view of a first lens of the lens barrel disclosed in the embodiment of the present invention;

fig. 4 is a stray light walking diagram of a lens disclosed by the embodiment of the invention when a3 is smaller than 10 degrees;

FIG. 5 is an enlarged view of the area M in FIG. 4;

fig. 6 is a diagram of the directions of stray light inside the lens when a3 of the lens disclosed by the embodiment of the invention is less than 10 °;

FIG. 7 is an image plane diagram of a lens barrel disclosed in the present embodiment, where A3 is smaller than 10 °;

FIG. 8 is a stray light walking diagram of a lens disclosed in the embodiment of the present invention when A4/A5 is greater than 0.7;

FIG. 9 is an enlarged view of the area N in FIG. 8;

fig. 10 is a stray light walking diagram when the size of a2 of the lens disclosed by the embodiment of the invention is less than 0.02 mm;

fig. 11 is an enlarged view of region P in fig. 10;

FIG. 12 is a diagram of the directions of stray light inside the lens when the size of A2 of the lens disclosed by the embodiment of the invention is less than 0.02 mm;

FIG. 13 is an enlarged view of flare in a lens disclosed in an embodiment of the present invention where A2 is less than 0.02mm in size;

fig. 14 is an image plane diagram of a lens barrel disclosed in the embodiment of the invention when a2 is smaller than 0.02mm in size;

fig. 15 is a stray light walking diagram of a lens disclosed in the embodiment of the present invention when the a1 size is larger than 0.02 mm;

FIG. 16 is an enlarged view of the area Q in FIG. 15;

fig. 17 is a front view of an electronic device disclosed in an embodiment of the present invention.

Icon: 10. a lens barrel; 11. a barrel; 12. a light shielding portion; 121. an annular inner flange; 122. a tapered cavity; 123. a light through hole; 124. a stopping step; 20. a first lens; 21. an optical portion; 211. an object side surface; 212. a conical side surface; 213. an image side surface; 22. a non-optic portion; 30. a shading sheet; 200. a lens module; 300. an electronic device; 301. a housing.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the present invention, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "center", "vertical", "horizontal", "lateral", "longitudinal", and the like indicate an orientation or positional relationship based on the orientation or positional relationship shown in the drawings. These terms are used primarily to better describe the invention and its embodiments and are not intended to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation.

Moreover, some of the above terms may be used to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meanings of these terms in the present invention can be understood by those skilled in the art as appropriate.

Furthermore, the terms "mounted," "disposed," "provided," "connected," and "connected" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; can be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements or components. The specific meanings of the above terms in the present invention can be understood by those of ordinary skill in the art according to specific situations.

Furthermore, the terms "first," "second," and the like, are used primarily to distinguish one device, element, or component from another (the particular nature and configuration of which may be the same or different, and not intended to indicate or imply the relative importance or importance of the indicated device, element, or component.

The following detailed description is made with reference to the accompanying drawings.

Example one

Referring to fig. 1 to 3, fig. 1 is a sectional view of a lens barrel disclosed in the present embodiment, fig. 2 is a sectional view of a lens barrel disclosed in the present embodiment, and fig. 3 is a front view of a first lens disclosed in the present embodiment. The lens barrel in the present embodiment includes a lens barrel 10 and a lens group.

Specifically, the lens barrel 10 includes a cylinder 11 and a light shielding portion 12 connected to the cylinder 11, the light shielding portion 12 extending from the cylinder 11 toward the object side; the lens group comprises a first lens 20, the first lens 20 comprises an optical part 21 and a non-optical part 22, the non-optical part 22 is arranged around the periphery of the optical part 21, the cross-sectional area of the optical part 21 gradually increases along the object side to image side direction, the optical part 21 is provided with a conical side surface 212, the first lens 20 is arranged at one end of the cylinder 11 close to the object side, and the light shielding part 12 is arranged around the optical part 21. The included angle a3 between the conical side surface 212 and the axis of the cylinder 11 is 10 ° to 20 °, for example, 10 °, 12 °, 14 °, 16 °, 18 °, or 20 °.

When the included angle a3 is smaller than 10 °, the cone side surface 212 tends to be more parallel to the optical axis of the lens, incident stray light is emitted to the optical portion 21 and refracted by the optical portion 21 and then easily strikes the cone side surface 212 of the optical portion 21, and reflected light of the stray light easily strikes the effective imaging area of the photo sensor chip (see fig. 4 and 5), at this time, the stray light in the lens tends to be as shown by a dotted line frame in fig. 6, and light spots as shown in fig. 7 easily appear on the image surface of the lens. In addition, when the included angle a3 is smaller than 10 °, the optical portion 21 tends to be more straight-tube-shaped, and during the actual processing of the first lens 20, the optical portion 21 has a larger friction with a mold during demolding, which easily damages the first lens 20, is not easy to demold, and has a low production yield.

When the included angle a3 is greater than 20 °, the cone 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 element 20 is too large, which is not favorable for implementing the design of a small head of a lens, and thus cannot meet the requirement of a small opening of an electronic device such as a mobile phone panel.

That is, in the present invention, the included angle a3 between the tapered side surface 212 of the optical portion 21 and the axis of the barrel 11 is in the range of 10 ° to 20 °, which not only improves the production yield of the first lens 20 and the imaging quality of the lens, but also facilitates the realization of the small head design of the lens, and further satisfies the design requirements of small aperture and high screen ratio of electronic products and the like.

Further, the thickness a5 of the first lens 20 on the lens optical axis is 1mm to 1.5mm, for example, 1mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm or 1.5mm, and when the thickness a5 of the first lens 20 on the lens optical axis is greater than 1.5mm, the thickness ratio of the optical portion 21 and the non-optical portion 22 is increased, so that a weld line is easily generated, which makes the processing of the first lens 20 difficult and makes the molding difficult. When the thickness a5 of the first lens element 20 on the optical axis of the lens is smaller than 1mm, the lens does not meet the requirements of the design under the screen, and the front end of the lens cannot be completely accommodated in the hole under the screen.

Further, the light shielding portion 12 in this embodiment is an annular light shielding portion, which can enclose a tapered cavity 122 that is matched with the tapered side surface 212 of the optical portion 21, so that the optical portion 21 of the first lens 20 can be accommodated conveniently by the function of the tapered cavity 122, and the tapered cavity 122 and the tapered side surface 212 of the optical portion 21 are matched to improve the close contact between the two, thereby further reducing the size of the head of the lens, and facilitating the implementation of the overall screen design of electronic devices such as mobile phones and wearable devices. It is understood that the center axis of the optical portion 21 of the present invention coincides with the optical axis of the lens. In the embodiment, the overall thickness of the optical portion 21 of the first lens 20 is greater than that of the 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 with the object side surface 211, and further, the light shielding portion 12 of the lens barrel 10 can surround the conical side surface 212, so as to surround the optical portion 21, and the light shielding function is conveniently realized.

As shown in fig. 1 to 3, the lens barrel 10 in this embodiment is provided with a light-passing hole 123, the light-passing hole 123 is communicated with the tapered cavity 122, and the inner side wall surface of the lens barrel 10 is provided with a stopping step 124, when actually mounted, the optical portion 21 of the first lens 20 is mounted in the light-passing hole 123, so that the light entering from the light-passing hole 123 can be processed, and the non-optical portion 22 of the first lens 20 is stopped at the stopping step 124 at the light-passing hole 123, so that the first lens 20 can be limited and mounted. Specifically, the first lens 20 may be fixed to the stopping step 124 by glue or the like, and has a simple structure and is easy to mount. During actual assembly, 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 for curing so as to bond the first lens 20 and the lens barrel 10, which is simple and convenient. The adhesive can be optical adhesive (OCA), such as organic silica gel, acrylic resin, unsaturated polyester, polyurethane, epoxy resin, etc.

Optionally, the cross section of the light passing hole 123 in this embodiment is circular. In other embodiments, the cross section of the light passing hole 123 may be rectangular, elliptical, or polygonal. The cross-sectional shape of the light passing 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 passing hole 123 is circular.

The tube 11 and the light shielding portion 12 in this embodiment are integrally formed, and have high structural strength and good stability. Specifically, the cylinder 11 and the light shielding portion 12 may be integrally formed by injection molding, or may be formed by processing such as 3D printing. In some embodiments of the present invention, the lens barrel 10 is made of a plastic material. It is understood that the lens barrel 10 may be formed by hot-melting using a plastic material (e.g., black plastic material L-1225Y) by baking and then injection molding. Since the strength of the plastic material is small, the minimum wall thickness T of the lens barrel 10 is 0.25mm in order to ensure the stability of the lens barrel 10. In other embodiments, the lens barrel 10 may be made of a metal material. Since the metal material has a large strength, the wall thickness of the lens barrel 10 can be made thinner.

Alternatively, in other embodiments of the present invention, the cylinder 11 and the light shielding portion 12 may be separately disposed and then assembled into a whole, and specifically, the cylinder 11 and the light shielding portion 12 may be separately disposed and then welded into a whole, or fixed together by a structure such as a snap, a screw, a pin, or a rivet, which is within the scope of the present invention as long as the other modifications are within the spirit of the present invention.

Further, an inner annular flange 121 is disposed on an inner sidewall surface of the light passing hole 123, a protruding direction of the inner annular flange 121 is perpendicular to the optical axis of the lens, the inner annular flange 121 protrudes in a direction perpendicular to the optical axis of the lens, and a distance from one end of the inner annular flange 121 close to the optical axis of the lens to one end of the cone side surface 212 close to the lens object side in the optical axis direction of the lens is a4, wherein a ratio of a4/a5 is 0.3 to 0.7, for example, 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 emitted to the optical portion 21 and refracted by the optical portion 21 and then easily strikes the conical side 212 of the optical portion 21, and the reflected light of the stray light is easily emitted to the effective imaging area of the photosensitive chip (see fig. 8 and 9), so that a spot is easily formed on the image plane of the lens. If the ratio A4/A5 between A4 and A5 is less than 0.3, the distance of the tapered side surface 212 in the optical axis direction is relatively short, which affects the depth of the small head of the lens. In addition, in the process of actually processing the first lens 20, the ratio of the thickness of the non-optical part 22 on the optical axis to the thickness of the optical part 21 is more moderate, so that the contraction ratios of plastics at the parts of the optical part 21 and the non-optical part 22 are as same as possible, the difference between the aspheric shape and the design value of the first lens 20 can be reduced, and the production yield of the first lens 20 and the imaging quality of a lens can be ensured.

Further, the projection height a2 of the annular inner flange 121 in the direction perpendicular to the optical axis of the lens is 0.02mm to 0.15mm, for example, 0.02mm, 0.05mm, 0.08mm, 0.12mm, or 0.15mm, etc. When the size of the protrusion height a2 of the annular inner flange 121 is smaller than 0.02mm, stray light emitted to the lens is easily emitted to the conical side surface 212 of the optical portion 21 (see fig. 10 and 11), and is reflected by the conical side surface 212 and then is easily emitted 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 shown by a dotted line frame in fig. 12 and 13, light spots shown in fig. 14 are more easily generated on the image surface of the lens, and when the size of the protrusion height a2 of the annular inner flange 121 is larger than 0.15mm, the size of the first lens 20 is increased, so that the size of the lens head is increased, and the small head design of the lens is difficult to realize.

Further, a perpendicular distance a1 from an end of the annular inner flange 121 close to the lens optical axis to the object side surface 211 is 0.001mm to 0.02mm, for example, 0.005mm, 0.01mm, 0.015mm, or 0.02mm, etc. a1 is provided. When the a1 size is smaller than 0.001mm, the annular inner flange 121 is very close to the object-side surface 211 of the first lens 20, and during assembly, the annular inner flange 121 of the lens barrel 10 easily interferes with the first lens 20, and the object-side surface 211 of the first lens 20 is easily worn; when the size of a1 is larger than 0.02mm, stray light emitted to the lens is easily emitted to the tapered side surface 212 of the optical portion 21, and at this time, the stray light in the lens barrel 10 is reflected by the tapered side surface 212 of the optical portion 21 and is more easily emitted to the effective imaging area of the photosensitive chip as shown in fig. 15 and 16, and light spots are more easily generated in the image of the lens as shown in fig. 14.

As an optional implementation manner, the width of the annular inner flange 121 in the lens optical axis direction gradually decreases to zero, that is, the portion of the annular inner flange 121 close to the lens optical axis is relatively sharp, so that the outer surface of the annular inner flange 121 can be prevented from affecting the optical path direction of the stray light, and further the stray light can be prevented from being emitted to the image plane of the lens.

Optionally, the longitudinal section of the annular inner flange 121 is a triangle having an included angle a6 disposed close to the optical axis of the lens, wherein 50 ° < a6 < 135 °, such as 60 °, 90 ° or 120 °, is beneficial to forming the sharp angle of the light-passing hole 123, making it dimensionally stable, and avoiding the occurrence of an unstable state of stray light. It is understood that the longitudinal section of the annular inner flange 121 here refers to a section obtained by vertically cutting the annular inner flange 121 along a plane parallel to the optical axis direction 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 may also be other special-shaped structures with sharp angles near the optical axis end of the lens.

Optionally, the object-side surface 211 in this embodiment is convex at the optical axis of the lens. The optical portion 21 further has an image side surface 213, and the image side surface 213 is convex at the lens optical axis. In this embodiment, the object-side surface 211 and the image-side surface 213 of the first lens element 20 are both convex surfaces, which is favorable for correcting the peripheral aberration, improving the imaging resolution, focusing the incident light beam, and effectively transmitting the image information collected by the lens to the image plane.

In some alternative embodiments of the present invention, the lens group includes a second lens, a third lens, and the like in addition to the first lens 20, and may be specifically designed according to the imaging requirements of the lens barrel. In this embodiment, the first lens 20, the second lens, and the third lens may be plastic lenses, glass lenses, or the like. In the present invention, the first lens 20 is preferably made of plastic, which is simple in structure and easy to mold and process. Alternatively, the first lens 20 may be made of Polymethyl methacrylate (PMMA) or Polycarbonate (PC). The polymethyl methacrylate material and the polycarbonate material are easy to deform due to shear damage. Therefore, the first lens 20 is formed by injection molding, and the formation of the first lens 20 by cutting off a part of the material can be avoided. The first lens 20, the second lens and the third lens may be arranged in a circular shape, and may also be arranged in a square shape or other special-shaped structures.

Further, the lens barrel of the present invention includes a light-shielding sheet 30, and the light-shielding sheet 30 is annular and disposed between any adjacent two lenses. In some embodiments of the present invention, the light shielding sheet 30 is disposed inside the barrel 11 and at 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, and stray light is prevented from affecting the imaging quality.

Further, the lens barrel of the present invention further includes a spacer ring (not shown). The spacer ring is disposed between any adjacent two lenses. In this manner, the spacing between two adjacent lenses can be set as desired using a spacer ring.

In summary, the lens barrel of the present invention can improve the stray light of the first lens element 20, and the head of the lens barrel can be designed to be smaller, so as to improve the production efficiency, yield and imaging quality of the lens barrel. When the lens is applied to the front camera module of the electronic equipment, the opening of the screen of the electronic equipment can be reduced under the condition of ensuring the field angle FOV and the shooting effect of the lens, so that the screen occupation ratio can be improved.

Example two

The invention also provides a lens module, which comprises a photosensitive chip and the lens, wherein the photosensitive chip is arranged at the image side of the lens. The included angle A3 between the conical side surface of the lens module and the axis of the barrel is 10-20 degrees, and the included angle A3 between the conical side surface 212 of the optical part 21 and the axis of the barrel 11 is 10-20 degrees, so that the production yield of the first lens 20 and the imaging quality of the lens can be improved, the small head design of the lens is facilitated, and the design requirements of small openings and full screens of electronic products and the like can be met. When the lens is applied to the front camera module of the electronic equipment, the opening of the screen of the electronic equipment can be reduced under the conditions of ensuring the field angle FOV and the shooting effect of the lens, so that the screen occupation ratio can be improved.

EXAMPLE III

Referring to fig. 17, the present invention provides an electronic device 300, where the electronic device 300 may be a wearable device such as a mobile phone, a tablet computer, a notebook computer, a telephone watch, and the like, the electronic device includes a lens module 200 and a housing 301, and the lens module 200 is disposed in the housing 301.

The included angle A3 between the conical side surface 212 of the lens module and the axis of the barrel 11 is 10-20 degrees, and the included angle A3 between the conical side surface 212 of the optical part 21 and the axis of the barrel 11 is 10-20 degrees, so that the production yield of the first lens 20 and the imaging quality of the lens can be improved, the small head design of the lens is facilitated, and the design requirements of small openings and full screens of electronic products and the like can be met. The electronic equipment can reduce the open hole of the screen of the electronic equipment 300 under the condition of ensuring the field angle FOV and the shooting effect of the lens, so that the screen occupation ratio can be improved.

The lens, the lens module and the electronic device disclosed in the embodiments of the present invention are described in detail, and the principle and the embodiments of the present invention are explained in detail by using specific examples, and the description of the embodiments is only used to help understanding the lens, the lens module and the electronic device and the core ideas thereof; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.

Claims (10)

1. A lens barrel characterized by comprising:

the lens barrel comprises a barrel body and a shading part connected with the barrel body, wherein the shading part extends from the barrel body to an object side; and

the lens group comprises a first lens and a second lens, wherein the first lens comprises an optical part and a non-optical part, the non-optical part is arranged around the periphery of the optical part, the cross section area of the optical part is gradually increased along the direction from an object side to an image side, the optical part is provided with a conical side face, the first lens is arranged at one end, close to the object side, of the cylinder, and a light shielding part is arranged around the optical part;

wherein an included angle A3 between the cone side face and the axis of the cylinder body is 10-20 degrees.

2. The lens barrel as claimed in claim 1, wherein a thickness a5 of the first lens element on the optical axis of the lens barrel is 1mm to 1.5 mm.

3. The lens barrel according to claim 1, wherein the light-shielding portion is an annular light-shielding portion that surrounds a tapered cavity that fits a tapered side of the optical portion.

4. The lens barrel according to claim 3, wherein a light passing hole is provided at an end of the light shielding portion close to the object side, the light passing hole communicates with the tapered cavity, an inner annular flange is provided on an inner side wall surface of the light passing hole, a protruding direction of the inner annular flange is perpendicular to an optical axis of the lens barrel, and a protruding height a2 of the inner annular flange in a direction perpendicular to the optical axis of the lens barrel is 0.02mm to 0.15 mm.

5. The lens barrel according to claim 4, wherein the optical portion further has an object side surface, and wherein a perpendicular distance from an end of the annular inner flange close to the lens optical axis to the object side surface is A1, and A1 is 0.001mm to 0.02 mm.

6. The lens barrel as claimed in claim 4, wherein a distance from an end of the annular inner flange close to the lens optical axis to an end of the cone side surface close to the lens object side in the lens optical axis direction is A4, and a thickness of the first lens element on the lens optical axis is A5, wherein a ratio of A4/A5 is 0.3 to 0.7.

7. The lens barrel according to claim 4, wherein a width of the annular inner flange in the optical axis direction gradually becomes smaller to zero in a direction close to the lens barrel central axis.

8. A lens barrel according to claim 4, wherein a longitudinal section of the annular inner flange is triangular with an included angle A6 disposed close to the optical axis of the lens, wherein 50 ° < A6 < 135 °.

9. A lens module, comprising the lens of any one of claims 1 to 8 and a photo sensor chip disposed on an image side of the lens.

10. An electronic device, comprising the lens module as claimed in claim 9.

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