Lens barrel, telecentric lens and camera module

Abstract

The embodiment of the invention relates to the technical field of telecentric lenses, and provides a lens barrel, a telecentric lens and a camera module, the lens barrel of the telecentric lens comprises a first lens barrel, a switching assembly and a second lens barrel which are arranged from an object side to an image side, the first lens barrel is used for placing a first lens group, and the second lens barrel is used for placing a second lens group; the switching assembly has a straight-through connection state and a corner connection state, when the switching assembly is in the straight-through connection state, the axis of the first lens cone is parallel to the axis of the second lens cone, and the distance between the first lens group and the second lens group is a first optical path; when the switching assembly is in a corner connection state, the axis of the first lens cone is perpendicular to the axis of the second lens group, and the distance between the first lens group and the second lens group is a second optical path; the second optical path is equal to the first optical path. The lens barrel has a straight barrel connection state and a corner connection state, and achieves the purposes of adapting to different placement spaces and meeting the optical performance consistency requirement of the telecentric lens.

Description

Technical Field

[0001] This application relates to the technical field of telecentric lenses, and in particular, to a lens barrel, a telecentric lens, and a camera module. Background Art

[0002] Machine vision inspection technology is widely applied to various links of manufacturing industries. In the appearance defect inspection links of many industries, machine vision inspection technology plays an important role, such as in the fields of circuit boards, semiconductor chips, display panels, food packaging, etc.

[0003] With the continuous improvement of the level of industrial intelligence, the accuracy requirements for product defect inspection are getting higher and higher. Generally, a telecentric lens can be used to perform high-precision dimensional measurement or inspection on products. However, the lens barrel of the telecentric lens in the related art is a straight barrel type, that is, the object plane of the lens is parallel to the image plane. When arranging a camera or a device or apparatus that needs to install a camera module, sufficient space needs to be reserved, and it cannot be arranged in a narrow space or a corner space, resulting in limited application scenarios. Summary of the Invention

[0004] Embodiments of this application provide a lens barrel, a telecentric lens, and a camera module, which are used to solve the problem that the telecentric lens in the related art has relatively high requirements for the arrangement space and limited application scenarios.

[0005] To achieve the above object, the embodiments of this application adopt the following technical solutions:

[0006] In a first aspect, an embodiment of this application provides a lens barrel of a telecentric lens, including a first lens barrel, an adapter assembly, and a second lens barrel arranged from the object side to the image side. The first lens barrel is used to place a first lens group, and the second lens barrel is used to place a second lens group; the adapter assembly has a direct connection state and a corner connection state. When the adapter assembly is in the direct connection state, the axis of the first lens barrel is parallel to the axis of the second lens barrel, and the distance between the first lens group and the second lens group is a first optical path; when the adapter assembly is in the corner connection state, the axis of the first lens barrel is perpendicular to the axis of the second lens group, and the distance between the first lens group and the second lens group is a second optical path; the distance between the second optical path and the first optical path is equal.

[0007] In some embodiments, the adapter assembly includes: an adapter, a first connector, and a second connector; the adapter includes a first interface, a second interface, a third interface, and a fourth interface, the first interface and the second interface are oppositely arranged along a first direction, the third interface and the fourth interface are oppositely arranged along a second direction, the first connector is used to cover or open the second interface or cover or open the third interface, the second connector is detachably connected to the fourth interface, and the first direction is perpendicular to the second direction; the first interface is connected to the first lens barrel, the second interface is connected to the second lens barrel, the first connector covers the third interface, the axis of the second lens barrel coincides with the axis of the second lens barrel and is parallel to the first direction, so that a direct channel is formed between the first interface and the second interface; the first interface is connected to the first lens barrel, the third interface is connected to the second lens barrel, the axis of the first lens barrel is parallel to the first direction, and the axis of the second lens barrel is parallel to the second direction; the first connector covers the second interface, a vertical corner channel is formed between the first interface and the third interface, and the adapter further includes a reflecting mirror disposed in the vertical corner channel, and the reflecting mirror is used to deflect the optical axis of the first lens group by 90° and then make it parallel to the optical axis of the second lens group.

[0008] In some embodiments, the reflecting mirror includes a reflecting surface, and the included angle formed between the reflecting surface and the axis of the second lens group is 45°, and the center of the reflecting surface coincides with the intersection point of the axis of the first lens group and the axis of the second lens group.

[0009] In some embodiments, the reflecting mirror includes a mirror body and a mirror base, the mirror body is an isosceles right triangular prism, the inclined surface of the mirror body is the reflecting surface, the mirror body is disposed inside the mirror base, and the reflecting surface is exposed outside the mirror base; the length direction of the mirror body, the axis of the first lens group, and the axis of the second lens group are perpendicular to each other in pairs.

[0010] In some embodiments, the mirror base is connected to the second connector.

[0011] In some embodiments, the mirror base and the second connector are of an integral structure.

[0012] In some embodiments, the adapter and the first lens barrel are of an integral structure.

[0013] In some embodiments, the adapter and the second lens barrel are of an integral structure.

[0014] In some embodiments, the adapter is detachably connected to the first lens barrel, and the adapter is detachably connected to the second lens barrel.

[0015] In some embodiments, the first connecting member is detachably connected to the adapter member.

[0016] In some embodiments, the first connecting member has a plate-like structure.

[0017] The lens barrel of the telecentric lens provided by the embodiments of the present application, the first lens barrel and the second lens barrel are connected through an adapter assembly. The user can determine whether the adapter assembly is in a direct connection state or a corner connection state according to needs, and correspondingly connect the first lens barrel, the second lens barrel and the adapter assembly, so that the overall lens barrel is in a straight barrel state or a corner state. When the placement space for the telecentric lens is sufficient, the connection state of the adapter assembly can be arbitrarily selected. When the placement space for the telecentric lens is relatively narrow or located at a corner, the adapter assembly can be selected to be in a corner connection state, and then the first lens barrel, the second lens barrel and the adapter assembly are connected to complete the installation of the telecentric lens, thereby reducing the requirement for the placement space of the telecentric lens and expanding the application range. At the same time, when the adapter assembly is in a direct connection state or a corner connection state, the corresponding first optical path and the second optical path distance between the first lens group placed in the first lens barrel and the second lens group placed in the second lens barrel are the same, so that the imaging resolution, magnification, aberration, chromatic aberration and other optical properties of the telecentric lens are kept consistent.

[0018] In a second aspect, the embodiments of the present application provide a telecentric lens, including the lens barrel, the first lens group and the second lens group as described in the first aspect. The first lens group is disposed inside the first lens barrel of the lens barrel, and the second lens group is disposed inside the second lens barrel of the lens barrel.

[0019] The structure of the lens barrel in the telecentric lens in the embodiments of the present application is the same as that of the lens barrel in the telecentric lens in the first aspect, and the achieved technical effects are the same, so they will not be elaborated here.

[0020] In a third aspect, the embodiments of the present application provide a camera module, including a photosensitive element and the telecentric lens as described in the first aspect. The photosensitive element is disposed on the image side of the telecentric lens.

[0021] The structure of the telecentric lens in the camera module in the embodiments of the present application is the same as that of the telecentric lens in the second aspect, and the achieved technical effects are the same, so they will not be elaborated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic structural diagram of the telecentric lens in the embodiments of the present application when in a straight barrel connection state;

[0023] Figure 2 It is a schematic structural diagram of the telecentric lens provided by the embodiments of the present application when in a corner connection state;

[0024] Figure 3 is the top view of Figure 1 ;

[0025] Figure 4 is the A-A cross-sectional view of Figure 3 ;

[0026] Figure 5 is the top view of Figure 2 ;

[0027] Figure 6 is the B-B cross-sectional view of Figure 5 ;

[0028] Figure 7 is the enlarged view at I of Figure 4 ;

[0029] Figure 8 is the enlarged view at II of Figure 6 ;

[0030] Figure 9 is a schematic structural diagram of a reflector in some embodiments of the present application.

[0031] Among them, the reference numerals in the figure are as follows:

[0032] 10. First lens barrel;

[0033] 20. Second lens barrel;

[0034] 30. Adapter assembly; 301. Reflective surface; 31. Adapter; 311. First interface; 312. Second interface; 313. Third interface; 314. Fourth interface; 32. First connecting member; 33. Second connecting member; 34. Reflector; 341. Mirror base; 3411. Base; 3412. Support base; 342. Mirror body;

[0035] 40. Photosensitive element;

[0036] First lens group G1; Second lens group G2; First lens L1; Second lens L2; Third lens L3; Fourth lens L4; Fifth lens L5; Sixth lens L6; Beam splitter prism L7. Specific embodiments

[0037] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0038] In the embodiments of the present application, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, unless otherwise specified, "a plurality of" means two or more.

[0039] As Figure 4 and Figure 6 shown, an embodiment of the present application provides a camera module, including a telecentric lens and a photosensitive element 40, and the photosensitive element 40 is located on the image side of the telecentric lens.

[0040] The working principle of the camera module is as follows: The light reflected by the object to be photographed passes through the telecentric lens to generate an optical image and projects it onto the photosensitive surface of the photosensitive element 40. The photosensitive element 40 converts the optical image into an electrical signal, i.e., an analog image signal, and transmits it to the processor.

[0041] Among them, the photosensitive element 40 (also known as an image sensor) is a semiconductor chip with hundreds of thousands to millions of photodiodes on its surface. When irradiated by light, it generates electric charges. The photosensitive element 40 can be a charge-coupled device (CCD) or a complementary metal-oxide semiconductor device (CMOS). The CCD is made of a high-sensitivity semiconductor material and can convert light into electric charges. The charge-coupled device consists of many photosensitive units, usually in units of millions of pixels. When the surface of the photosensitive element 40 is irradiated by light, each photosensitive unit reflects the electric charges on the component, and the signals generated by all the photosensitive units are added together to form a complete picture.

[0042] Among them, the telecentric lens is an optical lens mainly used in the fields of machine vision, precision measurement, and detection, etc. The optical lens mainly uses the refraction principle of the lens to form an image, that is, the light of the object passes through the optical lens to form a clear image on the focal plane, and the image of the object is recorded by the photosensitive element 40 located on the focal plane.

[0043] As Figure 1 , Figure 2 , Figure 4 and Figure 6 shown, the telecentric lens includes a lens barrel, a first lens group G1, and a second lens group G2.

[0044] Specifically, as Figure 1 , Figure 2 , Figure 4 and Figure 6As shown in the figure, the barrel of the telecentric lens includes a first barrel 10, an adapter assembly 30, and a second barrel 20 arranged from the object side to the image side. The first barrel 10 is used to place the first lens group G1, and the second barrel 20 is used to place the second lens group G2. The adapter assembly 30 has a direct connection state and a corner connection state. When the adapter assembly 30 is in the direct connection state, the axis of the first barrel 10 is parallel to the axis of the second barrel 20. That is to say, the overall barrel is in a straight barrel state, and the axis of the overall barrel is parallel to the axis of the second barrel 20. At this time, the distance between the first lens group G1 and the second lens group G2 is the first optical path ( Figure 4 H1 in Figure 6 ); when the adapter assembly 30 is in the corner connection state, the axis of the first barrel 10 is perpendicular to the axis of the second lens group G2. That is to say, the overall barrel is in a corner state, that is, in an L-shaped connection structure. The distance between the first lens group G1 and the second lens group G2 is the second optical path (

[0045] the sum of H2 and H3 in

[0046] ); the second optical path is equal to the first optical path.

[0047] The above-mentioned first optical path H1 is the distance between the first lens group G1 and the second lens group G2 along the axis of the barrel.

[0048] The above-mentioned second optical path includes the distance H2 between the first lens group G1 and the mirror 34 in the optical axis direction of the first lens group G1, and the distance H3 between the mirror 34 and the second lens group G2 in the optical axis direction of the second lens group G2. Figure 4 and Figure 6 The above-mentioned second optical path is equal to the first optical path. That is to say, when the adapter assembly 30 is in the direct connection state and the corner connection state, the distance between the first lens group G1 and the second lens group G2 in the optical axis direction is equal. Thus, when the structures of the first lens group G1 and the second lens group G2 do not change, when the adapter assembly 30 is in the direct connection state and the corner connection state, the optical performance parameters such as the overall optical length, focal length, and field of view angle of the imaging system of the telecentric lens composed of the first lens group G1 and the second lens group G2 do not change, so that the imaging resolution, magnification, aberration, chromatic aberration and other optical performances of the imaging system are consistent.

[0048] The above-mentioned first lens group G1 refers to the general term of the lenses arranged inside the first barrel 10, and the above-mentioned second lens group G2 refers to the general term of the lenses arranged inside the second barrel 20. The first lens group G1 and the second lens group G2 form the imaging system of the telecentric lens. Hereinafter, the imaging system including the first lens group G1 and the second lens group G2 is taken as an example for illustration. Such as Figure 4 and Figure 6As shown, the first lens group G1 includes a first lens L1, a second lens L2, a third lens L3, and a fourth lens L1 arranged from the object side to the image side; the second lens group G2 includes a fifth lens L5 and a sixth lens L6 arranged from the object side to the image side.

[0049] For the barrel of the telecentric lens provided by the embodiments of the present application, the first barrel 10 and the second barrel 20 are connected by an adapter assembly 30. The user can determine whether the adapter assembly 30 is in a direct connection state or a corner connection state according to needs, and correspondingly connect the first barrel 10, the second barrel 20, and the adapter assembly 30, so that the overall barrel is in a straight barrel state or a corner state. When the placement space for the telecentric lens is sufficient, the connection state of the adapter assembly 30 can be arbitrarily selected. When the placement space for the telecentric lens is relatively narrow or located at a corner, the adapter assembly 30 can be selected to be in a corner connection state, and then the first barrel 10, the second barrel 20, and the adapter assembly 30 are connected to complete the installation of the telecentric lens, thereby reducing the placement space requirements for the telecentric lens and expanding the application range. At the same time, when the adapter assembly 30 is in a direct connection state or a corner connection state, the corresponding first optical path and the second optical path distance between the first lens group G1 placed in the first barrel 10 and the second lens group G2 placed in the second barrel 20 are the same, so that the imaging resolution, magnification, aberration, chromatic aberration and other optical properties of the telecentric lens are kept consistent.

[0050] It should be noted that the barrel in the present application is described by taking the telecentric lens as an example. Of course, this barrel can also be applied to periscope lenses, and no specific limitation is made here.

[0051] As Figure 4 and Figure 6 As shown, in some embodiments, the adapter 31 and the first barrel 10 are of an integral structure. That is to say, when the adapter 31 and the first barrel 10 are of an integral structure, one end port of the first barrel 10 close to the second barrel 20 is the first interface 311. In this way, the number of components of the barrel is reduced, which not only improves the strength of the barrel, but also simplifies the assembly process of the barrel, which is beneficial to improving the reliability of the barrel.

[0052] In addition to being integrally structured with the first barrel 10, in some embodiments, the adapter 31 can also be integrally structured with the second barrel 20. Or, in some other embodiments, the adapter 31 is detachably connected to the first barrel 10, and the adapter 31 is detachably connected to the second barrel 20. That is to say, the overall barrel is made into a split type, and at the same time, the adapter 31, the first barrel 10, and the second barrel 20 can be detached from each other. In this way, the structure of each component of the barrel is simplified, which is convenient for processing. At the same time, when the adapter 31, the first barrel 10, and the second barrel 20 can be replaced separately, the maintenance cost is reduced.

[0053] It should be noted that the above detachable connection can be snap connection, screw connection, etc., and no specific limitation is made here.

[0054] Such as Figure 4 , Figure 6 , Figure 7 and Figure 8 , the adapter assembly 30 includes: an adapter 31, a first connector 32 and a second connector 33; the adapter 31 includes a first interface 311, a second interface 312, a third interface 313 and a fourth interface 314. The first interface 311 and the second interface 312 are oppositely arranged along a first direction, and the third interface 313 and the fourth interface 314 are oppositely arranged along a second direction. The first connector 32 is used to cover or open the second interface 312 or cover or open the third interface 313. The second connector 33 is detachably connected to the fourth interface 314. The first direction is perpendicular to the second direction; the first interface 311 is connected to the first lens barrel 10, the second interface 312 is connected to the second lens barrel 20, the first connector 32 covers the third interface 313, and the axis of the second lens barrel 20 coincides with the axis of the second lens barrel 20 and is parallel to the first direction, so that a direct-through channel is formed between the first interface 311 and the second interface 312. At this time, the adapter assembly 30 is in a direct-through connection state. When the first connector 32 covers the third interface 313 and the second connector 33 covers the fourth interface 314, a linear sealed light-transmitting channel is formed inside the lens barrel; the first interface 311 is connected to the first lens barrel 10, the third interface 313 is connected to the second lens barrel 20, the axis of the first lens barrel 10 is parallel to the first direction, and the axis of the second lens barrel 20 is parallel to the second direction; the first connector 32 covers the second interface 312, and a vertical corner channel is formed between the first interface 311 and the third interface 313. At this time, the adapter assembly 30 is in a corner connection state. When the first connector 32 covers the second interface 312 and the second connector 33 covers the fourth interface 314, an L-shaped sealed light-transmitting channel is formed inside the lens barrel. The adapter 31 further includes a reflecting mirror 34 disposed in the vertical corner channel. The reflecting mirror 34 is used to deflect the optical axis of the first lens group G1 by 90° so as to be parallel to the optical axis of the second lens group G2.

[0055] The adapter 31 is a cylindrical structure or a structure similar to a cylindrical structure. The first direction is the axial direction of the cylindrical structure, and the second direction is the radial direction of the cylindrical structure. That is to say, the two ports of the cylindrical structure in the axial direction are the first interface 311 and the second interface 312 respectively, and the third interface 313 and the fourth interface 314 are opened on the barrel wall of the cylindrical structure. The axes of the third interface 313 and the fourth interface 314 are parallel to the diameter of the cylindrical structure; alternatively, the adapter 31 is a hollow cubic structure or a structure close to a cubic structure.

[0056] Through the above arrangement, the switching of the adapter component 30 between the straight-through connection state and the corner connection state is achieved, which has a simple structure, strong practicality and a wide range of applications.

[0057] Since the interface connected to the second lens barrel 20 will change when the adapter component 30 is in different connection states, the structures of the second interface 312 and the third interface 313 are the same, which improves the versatility of the adapter component 30. At the same time, the structures of the second interface 312 and the third interface 313 need to match the structure at the port of the second lens barrel 20.

[0058] It should be noted that the first interface 311, the second interface 312, the third interface 313 and the fourth interface 314 on the adapter 31 are relative, and this is only for the purpose of determining the relative positional relationship. Here, the adapter 31 and the first lens barrel 10 are used as an example for explanation. When the adapter 31 and the second lens barrel 20 are an integral structure, the interface with the second lens barrel 20 remains unchanged when the adapter assembly 30 is in different connection states. However, for ease of understanding, the interface connected to the first lens barrel 10 is still called the first interface 311, and the names of other interfaces correspond, including the interface on the second lens barrel 20.

[0059] The first connecting member 32 and the adapter 31 are detachably connected, so that the assembly and maintenance of the first connecting member 32 and the adapter 31 are convenient.

[0060] Specifically, Figure 7 As shown, when the adapter assembly 30 is in a straight-through connection state, the first connecting member 32 is detachably connected to the third interface 313, and the first connecting member 32 realizes the sealing or opening of the third interface 313. When the first connecting member 32 seals the third interface 313 and the second connecting member 33 seals the fourth interface 314, a sealed light passage is formed inside the lens barrel.

[0061] The first connecting member 32 may be a plate-like structure, and the first connecting member 32 is connected to the third interface 313 by a fastener. In this way, materials are saved. Of course, the specific shape and size of the first connecting plate need to be determined according to the shape and size of the third interface 313, and are not specifically limited here.

[0062] The second connecting member 33 may be, but is not limited to, a plate-shaped structure. In this way, not only is material further saved, but also it is convenient to assemble or connect with other components. For example, the second connecting member 33 is connected to the reflector 34.

[0063] like Figure 6 , Figure 8 and Figure 9, the mirror 34 includes a reflecting surface 301. The included angle formed between the reflecting surface 301 and the axis of the second lens group G2 is 45°, and the center of the reflecting surface 301 coincides with the intersection point of the axis of the first lens group G1 and the axis of the second lens group G2.

[0064] The center of the above-mentioned reflecting surface 301 refers to the geometric center of the reflecting surface 301. The axes of the first lens group G1 and the second lens group G2 intersect, and the intersection is in an L shape.

[0065] As Figure 8 and Figure 9 shown, the mirror 34 includes a mirror body 342 and a mirror base 341. The mirror body 342 is an isosceles right triangular prism. The inclined surface of the mirror body 342 is the reflecting surface 301. The mirror body 342 is disposed inside the mirror base 341, and the reflecting surface 301 is exposed outside the mirror base 341; the length direction of the mirror body 342, the axis of the first lens group G1, and the axis of the second lens group G2 are perpendicular to each other in pairs.

[0066] In this way, the mirror 34 can achieve the purpose of deflecting the optical axis by 90°.

[0067] As Figure 8 and Figure 9 shown, in some embodiments, the mirror base 341 is connected to the second connecting member 33. In this way, the mutual influence on the connection between the adapter 31 and the first lens barrel 10 and the second lens barrel 20 is reduced.

[0068] The above-mentioned mirror base 341 and the second connecting member 33 can be an integral structure, including fixed connections such as integrally formed or glued, etc. Of course, the mirror base 341 and the second connecting member 33 can also be detachably connected by snap connection, screw connection, etc., and no specific limitation is made here.

[0069] Specifically, as Figure 8 and Figure 9 shown, the mirror base 341 and the second connecting member 33 are an integral structure. In this way, when the mirror 34 is installed through the fourth interface 314, the mirror base 341 of the mirror 34 functions as a cover for the fourth interface 314. Thus, the process of the adapter assembly 30 is simplified.

[0070] As Figure 9 shown, the mirror base 341 includes a base 3411 and a support base 3412. The mirror body 342 is located inside the support base 3412, and the reflecting surface 301 is exposed outside the support base 3412. The base 3411 and the second connecting member 33 are an integral structure. The base 3411 and the support base 3412 can be, but are not limited to, an integral structure.

[0071] In order to improve the imaging clarity of the telecentric lens, a coaxial light source is connected to the side wall of the second lens barrel 20, and a beam splitter prism L7 is provided inside the second lens barrel 20. The optical axis of the coaxial light source is perpendicular to the axis of the second lens barrel 20, and the light emitted by the coaxial light source enters the inside of the second lens barrel 20 through the beam splitter prism L7.

[0072] The beam splitter prism L7 can be, but is not limited to, a 45° beam splitter prism, and mainly functions to split the light emitted by the coaxial light source into two beams through reflection and refraction. The reflected light and the transmitted light are usually at a 90° angle.

[0073] Through the above settings, when the adapter assembly 30 is in the angular connection state, the optical axis of the coaxial light source is parallel to the axis of the first lens barrel, improving the space utilization rate and thus reducing the placement space of the telecentric lens.

[0074] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application and are not intended to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present application.

Claims

1. A telecentric lens barrel, characterized in that: The invention comprises a first lens barrel (10), a transfer assembly (30) and a second lens barrel (20) arranged from the object side to the image side, wherein the first lens barrel (10) is used to place a first lens group, and the second lens barrel (20) is used to place a second lens group; The adapter assembly (30) has a straight-through connection state and an angle connection state. When the adapter assembly (30) is in the straight-through connection state, the axis of the first lens barrel (10) is parallel to the axis of the second lens barrel (20), and the distance between the first lens group and the second lens group is a first optical path; when the adapter assembly (30) is in the angle connection state, the axis of the first lens barrel (10) is perpendicular to the axis of the second lens group, and the distance between the first lens group and the second lens group is a second optical path; the second optical path is equal to the first optical path.

2. The lens barrel according to claim 1, characterized in that: The adapter assembly (30) comprises: an adapter (31), a first connecting member (32) and a second connecting member (33); The adapter (31) comprises a first interface (311), a second interface (312), a third interface (313) and a fourth interface (314), wherein the first interface (311) and the second interface (312) are arranged opposite to each other along a first direction, and the third interface (313) and the fourth interface (314) are arranged opposite to each other along a second direction. The first connecting member (32) is used to cover or open the second interface (312) or to cover or open the third interface (313); the second connecting member (33) is detachably connected to the fourth interface (314); and the first direction is perpendicular to the second direction; The first interface (311) is connected to the first lens barrel (10), the second interface (312) is connected to the second lens barrel (20), the first connecting member (32) is covered on the third interface (313), the axis of the second lens barrel (20) coincides with the axis of the second lens barrel (20) and is parallel to the first direction, so that a straight passage is formed between the first interface (311) and the second interface (312); The first interface (311) is connected to the first lens barrel (10), and the third interface (313) is connected to the second lens barrel (20); the axis of the first lens barrel (10) is parallel to the first direction, and the axis of the second lens barrel (20) is parallel to the second direction; the first connecting member (32) is covered on the second interface (312); a vertical corner channel is formed between the first interface (311) and the third interface (313); the adapter (31) further comprises a reflector (34) arranged in the vertical corner channel; the reflector (34) is used to deflect the optical axis of the first lens group by 90° so that the optical axis is parallel to the optical axis of the second lens group.

3. The lens barrel according to claim 2, characterized in that: The reflector (34) comprises a reflective surface (301), the angle formed between the reflective surface (301) and the axis of the second lens group is 45°, and the center of the reflective surface (301) coincides with the intersection of the axis of the first lens group and the axis of the second lens group.

4. The lens barrel according to claim 3, characterized in that: The reflector (34) comprises a mirror body (342) and a mirror seat (341); the mirror body (342) is an isosceles right-angled triangular prism; the inclined surface of the mirror body (342) is the reflective surface (301); the mirror body (342) is arranged inside the mirror seat (341), and the reflective surface (301) is exposed outside the mirror seat (341); the length direction of the mirror body (342), the axis of the first lens group, and the axis of the second lens group are perpendicular to each other.

5. The lens barrel according to claim 4, characterized in that: The mirror base (341) is connected to the second connecting member (33).

6. The lens barrel according to claim 5, characterized in that: The mirror seat (341) and the second connecting member (33) are an integral structure.

7. The lens barrel according to any one of claims 2 to 6, characterized in that: The adapter (31) and the first lens barrel (10) are an integrated structure; Alternatively, the adapter (31) and the second lens barrel (20) are an integral structure.

8. The lens barrel according to any one of claims 2 to 6, characterized in that: The adapter (31) is detachably connected to the first lens barrel (10), and the adapter (31) is detachably connected to the second lens barrel (20).

9. The lens barrel according to any one of claims 2 to 6, characterized in that: The first connecting member (32) is detachably connected to the adapter (31); And / or, the first connecting member (32) is a plate-shaped structure.

10. A telecentric lens, characterized in that: include: The lens barrel according to any one of claims 1 to 9; A first lens group is arranged inside a first lens barrel (10) of the lens barrel; The second lens group is arranged inside the second lens barrel (20) of the lens barrel.

11. A camera module, characterized in that: include: The telecentric lens as claimed in claim 10; A photosensitive element (40), wherein the photosensitive element (40) is arranged on the image side of the telecentric lens.

Images