CN216792552U - Optical lens - Google Patents

Abstract

The utility model provides an optical lens. The optical lens includes: a lens barrel; a space ring; a light shielding member; the lens, the lens are a plurality of, and a plurality of lenses arrange in proper order in the lens cone along the axial of lens cone, and space ring and shading spare set up respectively between different adjacent lens, and the lens that is close to the thing side in a plurality of lenses is first lens, and the object side of first lens sets up by the convex lens cone, and the outer peripheral edge of the object side of first lens is concave to be set up in order to form the internal tangent plane. The utility model solves the problem that the wide angle and miniaturization of the optical lens in the prior art are difficult to be considered simultaneously.

Description

Optical lens

Technical Field

The utility model relates to an optical imaging system, in particular to an optical lens.

Background

With the development of science and technology, the development of the technical field of photoelectron becomes mature day by day. Taking an optical imaging system as an example, the optical imaging system is widely applied to portable electronic products, such as mobile phones, tablet computers, etc., because people's shooting requirements for the optical imaging system on the portable electronic products are continuously increased, the optical lens is taken as a core component in the optical imaging system, and the performance and the function of the optical lens are the main improvement directions at present. The wide-angle lens can bring perspective effect for shooting portrait or products in a short distance, so that shooting is more creative; secondly, the field depth effect of the wide-angle lens is usually very good, the main body and the background can be well separated, and better imaging quality is guaranteed. The optical lens with the wide-angle function is provided in the prior art, but the whole volume of the optical lens is large, the requirement for miniaturization is difficult to meet, and meanwhile, the whole stability is poor, so that the condition that the final imaging quality is unstable is caused.

That is, the optical lens in the related art has a problem that it is difficult to achieve both a wide angle and a small size.

SUMMERY OF THE UTILITY MODEL

The utility model mainly aims to provide an optical lens to solve the problem that the wide angle and miniaturization of the optical lens in the prior art are difficult to be simultaneously considered.

In order to achieve the above object, the present invention provides an optical lens comprising: a lens barrel; a space ring; a light shielding member; the lens, the lens are a plurality of, and a plurality of lenses arrange in proper order in the lens cone along the axial of lens cone, and space ring and shading spare set up respectively between different adjacent lens, and the lens that is close to the thing side in a plurality of lenses is first lens, and the object side of first lens sets up by the convex lens cone, and the outer peripheral edge of the object side of first lens is concave to be set up in order to form the internal tangent plane.

Further, the inner tangent plane includes one or more face segments, and the plurality of face segments includes one or more of a cambered face segment and a planar face segment.

Further, the first lens further has a bearing surface, the bearing surface is abutted against the inner wall surface of the lens barrel, and the inner tangent surface is arranged close to the optical axis relative to the bearing surface.

Further, the axial length c of the bearing surface and the distance d from the intersection point of the object side surface of the first lens and the optical axis to the object side end surface of the lens barrel on the optical axis satisfy: 0.1< c/d < 0.5.

Further, the center thickness CT1 of the first lens, the air gap T12 between the first lens and the second lens, and the maximum half-aperture D of the lens barrel satisfy: 0.3< (CT1+ T12)/D < 0.6.

Further, a half aperture A of the object side of the inner tangent plane of the first lens and a half aperture B of the image side of the inner tangent plane of the first lens satisfy: 0.7< A/B < 1.0.

Further, the periphery of the object side end of the lens barrel is provided with a platform structure, and the radial height a of the platform structure from the middle plane of the periphery of the lens barrel and the axial length b of the platform structure meet the following conditions: 0.5< a/b < 0.9.

Furthermore, the periphery of the object side end of the lens barrel has a platform structure, and an angle β formed by the image side end surface of the platform structure and the vertical axis satisfies: beta <10 deg.

Furthermore, the first lens is made of glass or plastic; and/or the first lens is glued with the lens barrel.

Further, the inner diameter of the lens barrel is gradually reduced from the object side to the image side along the optical axis; and/or the outer peripheral side of the lens barrel has a screw structure.

The optical lens comprises a lens barrel, a space ring, a shading piece and a plurality of lenses, wherein the plurality of lenses are sequentially arranged in the lens barrel along the axial direction of the lens barrel, the space ring and the shading piece are respectively arranged between different adjacent lenses, the lens close to the object side in the plurality of lenses is a first lens, the object side surface of the first lens is arranged in a protruding mode in the lens barrel, and the outer periphery of the object side surface of the first lens is arranged in a recessed mode to form an inner tangent plane.

The space ring and the shading piece are respectively arranged between different adjacent lenses, so that the space ring can be abutted between the two adjacent lenses, the space ring can support the two adjacent lenses, the risk of inclination or shaking caused by uneven pressure on the lenses in the assembling process is avoided, the assembling stability of the lenses is ensured, and the stability of the optical lens in the using process is further ensured; the shading part is located between two adjacent lenses, so that the shading part can protect the adjacent lenses, the friction loss between the adjacent lenses can be reduced, meanwhile, light reflected to the shading part can be absorbed, stray light is favorably improved, and the imaging quality of the optical lens can be effectively guaranteed. The convex lens cone in object side of first lens sets up, and the function that is favorable to realizing the optical lens wide angle is carried out rational planning through the shape to first lens on the one hand, satisfies the shooting demand of big visual angle, and on the other hand can effectively reduce first lens and occupy the inside volume of lens cone, is favorable to reducing the whole volume of optical lens, guarantees to miniaturize. The outer peripheral edge of the object side face of the first lens is recessed to form an inner tangent plane, the glue dispensing space is effectively enlarged by arranging the inner tangent plane, the assembly of the first lens is facilitated, the pressing ring structure is saved by glue dispensing and fixing of the first lens and the lens cone, the overall size is reduced on the premise of meeting the stability of the optical lens, and the cost is saved.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the utility model and, together with the description, serve to explain the utility model and not to limit the utility model. In the drawings:

fig. 1 is a schematic structural diagram of an optical lens according to a first embodiment of the present invention;

FIG. 2 is a schematic diagram showing another angle configuration of the optical lens of FIG. 1;

FIG. 3 is a parameter labeling diagram of the optical lens of FIG. 1;

fig. 4 is a schematic structural diagram of an optical lens according to a second embodiment of the present invention;

FIG. 5 is a parameter map of the optical lens of FIG. 4;

fig. 6 is a schematic structural diagram of an optical lens according to a third embodiment of the present invention;

fig. 7 shows a parameter map of the optical lens in fig. 6.

Wherein the figures include the following reference numerals:

10. a lens barrel; 11. a platform structure; 12. a thread structure; 21. a first lens; 211. cutting the inner section; 212. a bearing surface; 22. a lens; 30. a space ring; 40. a light shielding member; 50. an optical axis.

Detailed Description

It should be noted that, in the present application, the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

It is noted that, unless otherwise indicated, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

In the present invention, unless stated to the contrary, the use of directional terms such as "upper, lower, top, bottom" or the like, generally refers to the orientation of the components as shown in the drawings, or to the vertical, perpendicular, or gravitational orientation of the components themselves; likewise, for ease of understanding and description, "inner and outer" refer to the inner and outer relative to the profile of the components themselves, but the above directional words are not intended to limit the utility model.

The utility model provides an optical lens, aiming at solving the problem that the wide angle and miniaturization of the optical lens in the prior art are difficult to be simultaneously considered.

As shown in fig. 1 to 7, the optical lens includes a lens barrel 10, a spacer 30, a light shielding member 40, and a plurality of lenses 22, the plurality of lenses 22 are sequentially arranged in the lens barrel 10 along an axial direction of the lens barrel 10, the spacer 30 and the light shielding member 40 are respectively disposed between different adjacent lenses, a lens close to an object side among the plurality of lenses is a first lens 21, an object side surface of the first lens 21 is disposed to protrude from the lens barrel 10, and an outer peripheral edge of the object side surface of the first lens 21 is recessed to form an inner tangent surface 211.

The space ring 30 and the shading piece 40 are respectively arranged between different adjacent lenses 22, so that the space ring 30 can be abutted between the two adjacent lenses, the space ring 30 can support the two adjacent lenses, the risk of inclination or shaking caused by uneven pressure on the lenses 22 in the assembling process is avoided, the assembling stability of the lenses 22 is ensured, and the stability of the optical lens in the using process is further ensured; the light-shielding piece 40 is located between two adjacent lenses, so that the light-shielding piece 40 can protect the adjacent lenses, the friction loss between the adjacent lenses can be reduced, meanwhile, the light reflected to the light-shielding piece 40 can be absorbed, stray light can be improved, and the imaging quality of the optical lens can be effectively guaranteed. The protruding lens cone 10 setting of object side face of first lens 21 carries out rational planning through the shape to first lens 21 on the one hand and is favorable to realizing the wide-angle function of optical lens, satisfies the shooting demand of big visual angle, and on the other hand can effectively reduce first lens 21 and occupy the inside volume of lens cone 10, is favorable to reducing the whole volume of optical lens, guarantees the miniaturization. The concave setting of outer peripheral edge of the object side of first lens 21 is in order to form interior tangent plane 211, has effectively increased some glue spaces through setting up interior tangent plane 211, is favorable to the equipment of first lens 21, and is fixed through first lens 21 and lens-barrel 10 point glue, has saved the clamping ring structure, under the prerequisite that satisfies optical lens stability, has reduced whole volume again, practices thrift the cost.

Specifically, the first lens 21 is bonded to the lens barrel 10. In the assembling process, the space ring 30, the light shielding member 40 and the plurality of lenses 22 are sequentially assembled into the lens barrel 10 from the object side of the lens barrel 10 according to the sequence in practical application, after the components are assembled in place, the inner tangent plane 211 of the first lens 21 and the inner wall surface of the lens barrel 10 are sealed and fixed through dispensing, and dispensing is performed through the first lens 21 and the lens barrel 10, so that the structure of the pressure ring is reduced, the volume of the optical lens is reduced, and the cost is saved on the premise that the overall stability of the optical lens structure is ensured. Simultaneously the setting of interior tangent plane 211 can effectively block to overflow the gluey part that is used for imaging light to pass through that flows to first lens 21's object side to avoid overflowing gluey influence imaging light and stably pass through, guarantee that optical lens can stabilize the formation of image.

The optical lens of the present application can meet the demand for large-field-angle imaging, and the maximum field angle is 160 ° or more. The left side is the object side and the right side is the image side.

Specifically, the inner tangent plane 211 includes one or more face segments, and the plurality of face segments include one or more of arc face segments and plane face segments. When the inner tangent plane 211 is a plane segment, it may be a plane segment or an arc segment. When the inner tangent plane 211 is a plurality of surface segments, it mainly includes two surface segments, two surface segments are in round corner transition, and the two surface segments may be a combination of an arc surface segment and a plane segment, or both of them may be an arc surface segment or both of them may be plane segments, which may be selected according to actual situations.

Specifically, the first lens 21 further has a bearing surface 212, the bearing surface 212 abuts against an inner wall surface of the lens barrel 10, and the inner tangent surface 211 is arranged close to the optical axis 50 relative to the bearing surface 212, so that the stability of bearing and abutting of the first lens 21 against the lens barrel 10 can be ensured during assembly, and subsequent dispensing work is facilitated.

Specifically, the axial length c of the bearing surface 212 and the distance d from the intersection point of the object-side surface of the first lens 21 and the optical axis 50 to the object-side end surface of the lens barrel 10 on the optical axis 50 satisfy: 0.1< c/d < 0.5. By limiting the ratio of the axial length c of the bearing surface 212 to the distance d from the intersection point of the object side surface of the first lens 21 and the optical axis 50 to the object side surface of the lens barrel 10 on the optical axis 50 to be within the range of 0.1 to 0.5, the axial length c of the bearing surface 212 can be planned according to the specific shape of the first lens 21, the risk that the first lens 21 is inclined during assembly due to the fact that the axial length c of the bearing surface 212 is too small can be avoided, and the matching length of the first lens 21 and the lens barrel 10 is adjusted in such a way, so that the structural stability is improved, and the miniaturization is guaranteed at the same time. Preferably, 0.1< c/d < 0.5.

Specifically, the center thickness CT1 of the first lens 21, the air gap T12 between the first lens 21 and the second lens, and the maximum half-aperture D of the lens barrel 10 satisfy: 0.3< (CT1+ T12)/D < 0.6. The relation among the central thickness CT1 of the first lens 21, the air gap T12 between the first lens 21 and the second lens and the maximum half-aperture D of the lens barrel 10 is limited within a reasonable range, so that the overall structural strength of the optical lens is increased, and the optical lens is prevented from being deformed under pressure. Preferably, 0.4< (CT1+ T12)/D < 0.6.

The second lens element is a lens element on the image side of the first lens element 21.

Specifically, the object-side half aperture a of the inscribed surface 211 of the first lens 21 and the image-side half aperture B of the inscribed surface 211 of the first lens 21 satisfy: 0.7< A/B < 1.0. By limiting the ratio between the half aperture a of the object side of the inner tangent plane 211 of the first lens 21 and the half aperture B of the image side of the inner tangent plane 211 of the first lens 21 within a reasonable range, the size of the inner tangent plane 211 in the radial direction is favorably reduced, the volume ratio of glue is further reduced, the glue dispensing amount between the first lens 21 and the lens barrel 10 is reduced, the glue is prevented from overflowing and adhering to the object side surface of the first lens 21, and the visual appearance attractiveness is favorably ensured. Preferably, 0.8< a/B < 1.0.

Specifically, the outer circumference of the object-side end of the lens barrel 10 has a platform structure 11, and a radial height a of the platform structure 11 from a middle plane of the outer circumference of the lens barrel 10 and an axial length b of the platform structure 11 satisfy: 0.5< a/b < 0.9. The ratio of the radial height a of the platform structure 11 from the middle plane of the periphery of the lens barrel 10 to the axial length b of the platform structure 11 is limited within the range of 0.5 to 0.9, so that the rationality of the platform structure 11 is favorably ensured, the center of gravity of an optical lens is favorably adjusted, and the overall stability is improved. Preferably, 0.6< a/b < 0.8.

Specifically, an angle β formed by the image-side end surface of the platform structure 11 and the vertical axis satisfies: beta <10 deg. By limiting the angle beta formed by the image side end surface of the platform structure 11 and the vertical axis within the range of less than 10 degrees, the condition that the overall thickness uniformity of the lens barrel 10 is influenced by the excessive thickness of the platform structure 11 is avoided, and the uniformity of the thickness of the lens barrel 10 is effectively ensured.

Specifically, the first lens 21 is made of glass or plastic, and different materials can meet different scene requirements, for example, components in the optical lens adopt a form of mixing glass and plastic, so that the optical lens can adapt to multiple environments, and can ensure good structural stability under the multiple environments.

Specifically, the inner diameter of the lens barrel 10 gradually decreases from the object side to the image side along the optical axis 50, so that the change rule of the inner diameter of the lens is reasonably planned, which is beneficial to planning the assembly sequence of the optical lens, the assembly work of each component inside the lens barrel 10 and the increase of the assembly convenience.

Specifically, the outer peripheral side of the lens barrel 10 has the thread structure 12, and the thread structure 12 is located close to the image side of the lens barrel 10, so that the optical lens is assembled into a module, and the optical lens can be assembled and disassembled only by screwing.

Example one

As shown in fig. 1 to 3, seven lenses 22 are adopted in the optical lens, and the seven lenses 22 are arranged in the lens barrel 10 from the object side to the image side along the optical axis 50. The plurality of lenses 22 include a first lens 21 and six lenses located on the image side of the first lens 21, the spacer 30 is disposed between the third lens 22 and the fourth lens 22 from the object side, the light-shielding member 40 is disposed between each group of adjacent lenses except for seven lenses between the third lens 22 and the fourth lens 22, and in this embodiment, the light-shielding member 40 may be light-shielding paper or a light-shielding sheet. In this embodiment, the first lens 21 is made of glass, the object side of the first lens 21 protrudes out of the lens barrel 10, an inner tangent plane 211 is formed at the edge position of the object side of the first lens 21 by inner tangent, and the inner tangent plane 211 and the inner wall surface of the lens barrel 10 are fixed by dispensing and sealing.

As shown in fig. 3, the center thickness CT1 of the first lens 21, the air gap T12 between the first lens 21 and the second lens, and the maximum half-aperture D of the lens barrel 10 satisfy: (CT1+ T12)/D ═ 0.45; the radial height a of the platform structure 11 from the middle plane of the periphery of the lens barrel 10 and the axial length b of the platform structure 11 satisfy the following conditions: a/b is 0.63; an angle β formed by the image-side end surface of the platform structure 11 and the vertical axis satisfies: β is 4 °; the object-side half aperture a of the inner tangent plane 211 of the first lens 21 and the image-side half aperture B of the inner tangent plane 211 of the first lens 21 satisfy: A/B is 0.92; the axial length c of the bearing surface 212 and the distance d from the intersection point of the object side surface of the first lens 21 and the optical axis 50 to the object side end surface of the lens barrel 10 on the optical axis 50 satisfy the following condition: c/d is 0.29.

Note that, the CT1, CT2, and c are not labeled in fig. 3, and can refer to fig. 5 or fig. 7.

Example two

As shown in fig. 4 to 5, the optical lens system employs seven lenses, and the seven lenses are arranged in the lens barrel 10 from the object side to the image side along the optical axis 50. The plurality of lenses 22 include a first lens 21 and six lenses 22 located on the image side of the first lens 21, the spacer 30 is disposed between the third lens 22 and the fourth lens 22 from the object side, and the light-shielding member 40 is disposed between each group of adjacent lenses 22 except for seven lenses between the third lens 22 and the fourth lens 22, in this embodiment, the light-shielding member 40 may be a light-shielding paper or a light-shielding sheet. In this embodiment, the first lens 21 is made of glass, the object side of the first lens 21 protrudes out of the lens barrel 10, an inner tangent plane 211 is formed at an edge position of the first lens 21 by inner tangent, and the inner tangent plane 211 and an inner wall surface of the lens barrel 10 are sealed and fixed by dispensing.

Fig. 5 is a parameter labeling diagram of an optical lens according to a second embodiment. The center thickness CT1 of the first lens 21, the air gap T12 between the first lens 21 and the second lens, and the maximum half-aperture D of the lens barrel 10 satisfy: (CT1+ T12)/D ═ 0.55; the radial height a of the platform structure 11 from the middle plane of the outer periphery of the lens barrel 10 and the axial length b of the platform structure 11 satisfy that: a/b is 0.72; an angle β formed by the image-side end surface of the platform structure 11 and the vertical axis satisfies: β -8 °; the half aperture a on the object side of the inner tangent plane 211 of the first lens 21 and the half aperture B on the image side of the inner tangent plane 211 of the first lens 21 satisfy: A/B is 0.91; the axial length c of the bearing surface 212 and the distance d from the intersection point of the object side surface of the first lens 21 and the optical axis 50 to the object side end surface of the lens barrel 10 on the optical axis 50 satisfy the following condition: c/d is 0.31.

EXAMPLE III

As shown in fig. 6 to 7, the optical lens system employs seven lenses, and the seven lenses are arranged in the lens barrel 10 from the object side to the image side along the optical axis 50. The plurality of lenses 22 include a first lens 21 and six lenses 22 located on the image side of the first lens 21, the spacer 30 is disposed between the third lens 22 and the fourth lens 22 from the object side, and the light-shielding member 40 is disposed between each group of adjacent lenses except for seven lenses between the third lens 22 and the fourth lens 22, in this embodiment, the light-shielding member 40 may be a light-shielding paper or a light-shielding sheet. In this embodiment, the first lens 21 is made of plastic, the object side of the first lens 21 protrudes out of the lens barrel 10, the edge of the object side of the first lens 21 is inscribed to form an inner tangent plane 211, and the inner tangent plane 211 and the inner wall surface of the lens barrel 10 are sealed and fixed by dispensing.

Fig. 7 is a parameter labeling diagram of an optical lens according to a third embodiment. The center thickness CT1 of the first lens 21, the air gap T12 between the first lens 21 and the second lens, and the maximum half-aperture D of the lens barrel 10 satisfy: (CT1+ T12)/D ═ 0.41; the radial height a of the platform structure 11 from the middle plane of the outer periphery of the lens barrel 10 and the axial length b of the platform structure 11 satisfy that: a/b is 0.68; an angle β formed by the image-side end surface of the platform structure 11 and the vertical axis satisfies: β is 3 °; the object-side half aperture a of the inner tangent plane 211 of the first lens 21 and the image-side half aperture B of the inner tangent plane 211 of the first lens 21 satisfy: A/B is 0.86; the axial length c of the bearing surface 212 and the distance d from the intersection point of the object side surface of the first lens 21 and the optical axis 50 to the object side end surface of the lens barrel 10 on the optical axis 50 satisfy the following condition: c/d is 0.21.

In summary, all of the first to third embodiments satisfy the relationship shown in table 1.

Conditional expression (A) example	1	2	3
				(CT1+T12)/D	0.45	0.55	0.41
a/b	0.63	0.72	0.68
				β(°)	4	8	3
A/B	0.92	0.91	0.86
				c/d	0.29	0.31	0.21

TABLE 1

It is to be understood that the above-described embodiments are only a few, but not all, embodiments of the present invention. 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.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular is intended to include the plural unless the context clearly dictates otherwise, and it should be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of features, steps, operations, devices, components, and/or combinations thereof.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. An optical lens, comprising:

a lens barrel (10);

a space ring (30);

a light shielding member (40);

the lens (22), the lens (22) be a plurality of, a plurality of lens (22) arrange in proper order along the axial of lens barrel (10) in lens barrel (10), space ring (30) and light-shading piece (40) set up respectively between different adjacent lens (22), the lens (22) that is close to the object side in a plurality of lens (22) is first lens (21), the object side of first lens (21) is protruding the lens barrel (10) setting, the outer peripheral edge of the object side of first lens (21) is recessed and is set up in order to form interior tangent plane (211).

2. The optical lens according to claim 1, characterized in that the inner tangent plane (211) comprises one or more face segments, a plurality of which comprises one or more of a cambered and a planar segment.

3. The optical lens according to claim 1, characterized in that the first lens (21) further has a bearing surface (212), the bearing surface (212) abuts against an inner wall surface of the lens barrel (10), and the inner tangent surface (211) is disposed close to the optical axis (50) with respect to the bearing surface (212).

4. An optical lens according to claim 3, characterized in that the axial length c of the bearing surface (212) and the distance d between the intersection of the object-side surface of the first lens (21) and the optical axis (50) and the object-side end surface of the lens barrel (10) on the optical axis (50) satisfy: 0.1< c/d < 0.5.

5. The optical lens according to claim 1, characterized in that the central thickness CT1 of the first lens (21), the air gap T12 between the first lens (21) and the second lens and the maximum half aperture D of the lens barrel (10) satisfy: 0.3< (CT1+ T12)/D < 0.6.

6. An optical lens according to claim 1, characterized in that a half aperture a on the object side of the inner tangent plane (211) of the first lens (21) and a half aperture B on the image side of the inner tangent plane (211) of the first lens (21) satisfy: 0.7< A/B < 1.0.

7. An optical lens according to claim 1, characterized in that the outer circumference of the object-side end of the lens barrel (10) has a plateau structure (11), the radial height a of the plateau structure (11) from the middle plane of the outer circumference of the lens barrel (10) and the axial length b of the plateau structure (11) satisfying: 0.5< a/b < 0.9.

8. The optical lens according to claim 1, wherein an outer circumference of an object-side end of the lens barrel (10) has a plateau structure (11), and an angle β formed by an image-side end surface of the plateau structure (11) and a vertical axis satisfies: beta <10 deg.

9. An optical lens according to claim 1,

the first lens (21) is made of glass or plastic; and/or

The first lens (21) is glued with the lens barrel (10).

10. Optical lens according to any of claims 1 to 9,

the inner diameter of the lens barrel (10) is gradually reduced from the object side to the image side along the optical axis (50); and/or

The outer peripheral side of the lens barrel (10) has a screw structure (12).

Images