Lens, camera module and terminal

Abstract

The utility model relates to the technical field of lenses, and particularly discloses a lens, a camera module and a terminal. The lens comprises a lens barrel which is provided with a light through hole extending along the direction of an optical axis; the plurality of lenses are arranged in the light through holes; the locking ring is arranged in the light through hole and is in threaded connection with the object side and / or the image side of the lens cone; the spacer ring is arranged in the light through hole and is arranged between two adjacent lenses; the elastic ring is arranged in the light through hole, the elastic ring is in a circular ring shape, the Poisson ratio of the elastic ring is 0.4-0.5, and the elastic ring is arranged between the two adjacent lenses, or the elastic ring is arranged between the locking ring and the lens adjacent to the locking ring, or the elastic ring is arranged between the distance ring and the lens adjacent to the distance ring. According to the lens provided by the invention, the field curvature of the lens is adjusted by arranging the elastic ring, so that the field curvature of the lens is kept consistent.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of lenses, in particular to a lens, a camera module and a terminal. BACKGROUND

[0002] When assembling the lens, with the increase of the number of lenses in the lens, the cumulative tolerance of parts increases, the variable increases, and the yield of the assembled lens is greatly affected, resulting in poor consistency of field curvature after assembling the lenses of the same batch, and large difference in field curvature after assembling the lenses of different batches. CONTENT OF THE UTILITY MODEL

[0003] In view of the above, it is necessary to provide a lens, a camera module and a terminal, which can adjust the field curvature of the lens and keep the field curvature of the lens consistent.

[0004] In a first aspect, an embodiment of the present application provides a lens, comprising:

[0005] A lens barrel, which is provided with a light passing hole extending along the direction of the optical axis;

[0006] A plurality of lenses, which are arranged in the light passing hole;

[0007] A locking ring, which is arranged in the light passing hole and is threadedly connected with the object side and / or the image side of the lens barrel;

[0008] A spacer ring, which is arranged in the light passing hole and is arranged between two adjacent lenses;

[0009] An elastic ring, which is arranged in the light passing hole, is a circular ring, has a Poisson's ratio of 0.4-0.5, is arranged between two adjacent lenses, or is arranged between the locking ring and the lens adjacent to the locking ring, or is arranged between the spacer ring and the lens adjacent to the spacer ring.

[0010] The lens has the following advantages. The elastic ring is arranged. When the field curvature of the lens is large or small, the elastic ring is rotated to control the movement of the components such as the lens, the spacer ring and the like on the object side or the image side of the elastic ring along the direction of the optical axis, so that the air gap between the adjacent lenses is adjusted, the field curvature is adjusted, the adjustment of the field curvature of the lens is realized, and the consistency of the field curvature of the lens is maintained. In addition, the elastic ring can provide a pre-pressure for the lens, prevent the lens from loosening, ensure the assembly stability of the lens, prevent the locking force of the locking ring from being transmitted to the lens which is prone to breakage, prevent the lens from breaking, ensure the stability of the lens, increase the friction between the elastic ring and the adjacent components such as the lens, the locking ring and the spacer ring, reduce the vibration of the lens during transportation and use, reduce the radial movement of the components and affect the optical effect of the lens, and play a buffering role between the adjacent two lenses to prevent the lenses from directly contacting each other and prevent the ink layer on the lens from breaking. When a gap is generated in the lens, the elastic ring can push other components to move to block the gap by deforming itself, form a relatively closed space, and improve the waterproof and dustproof effect of the lens. By reasonably configuring the Poisson ratio of the elastic ring, the elastic ring can provide reasonable pre-pressure for the components, and the lens can be prevented from being cracked.

[0011] In one of the embodiments, at least one of the object side and the image side of the elastic ring is provided with a cut groove recessed along the direction of the optical axis.

[0012] The lens has the following advantages. The elastic ring has the cut groove recessed along the direction of the optical axis, and the elastic ring can realize the effects of water vapor dissipation and gas circulation through the cut groove.

[0013] In one of the embodiments, when the object side and the image side of the elastic ring are both provided with the cut groove, the cut grooves are arranged on the elastic ring in the direction of the optical axis.

[0014] The lens has the following advantages. The cut grooves on the object side and the image side of the elastic ring are arranged on the elastic ring, and the elasticity and the structural strength of the elastic ring are ensured.

[0015] In one of the embodiments, the distance between the groove bottom of the cut groove on the object side or the image side of the elastic ring and the image side or the object side of the elastic ring along the direction of the optical axis is greater than or equal to 0.05 mm.

[0016] The lens has the following advantages. The distance between the groove bottom of the cut groove and the image side or the object side is greater than or equal to 0.05 mm, and the structural strength of the elastic ring is ensured.

[0017] In one of the embodiments, the outer circumferential side of the elastic ring is provided with an edge groove recessed along the direction perpendicular to the optical axis.

[0018] The lens has the edge groove formed on the outer circumferential side of the elastic ring, and the elastic ring can dissipate water vapor and circulate gas through the edge groove.

[0019] In one of the embodiments, a distance between the groove bottom of the edge groove and the inner circumferential side of the elastic ring in the direction perpendicular to the optical axis is greater than or equal to 0.05 mm.

[0020] The lens limits the distance between the groove bottom of the edge groove and the inner circumferential side to be greater than or equal to 0.05 mm, thereby ensuring the structural strength of the elastic ring.

[0021] In one of the embodiments, the through hole is provided with a bearing portion, one of the lenses abuts the object side or the image side of the bearing portion, and / or two adjacent lenses abut the object side and the image side of the bearing portion, respectively, and the number of the elastic rings is two, and one of the elastic rings is arranged between the bearing portion and the lens adjacent to the bearing portion.

[0022] The lens limits one of the elastic rings to be arranged between the bearing portion and the lens adjacent to the bearing portion, thereby avoiding the direct connection between the lens and the bearing portion and the breakage of the lens.

[0023] In one of the embodiments, the cross section of the elastic ring along the optical axis and through the geometric center is circular, semicircular, elliptical or polygonal.

[0024] The lens limits the shape of the cross section of the elastic ring, so that the surfaces on both sides of the elastic ring in the direction of the optical axis can be in plane contact with the corresponding lens, locking ring and spacer ring after the elastic ring is compressed, thereby making the stress of the lens uniform.

[0025] In a second aspect, the embodiments of the present application also provide a camera module, which comprises a shell, a photosensitive chip and the lens as described in any one of the technical solutions above, the photosensitive chip is mounted in the shell, the shell is provided with a mounting hole, the lens is mounted in the mounting hole, and the lens and the photosensitive chip are coaxially arranged in the direction of the optical axis.

[0026] The camera module has the following advantages: the elastic ring can provide a pre-pressure for the lens, avoid loosening of the lens, and ensure assembly stability of the lens; the elastic ring can prevent locking force of the locking ring from being transmitted to the lens which is prone to breakage, prevent breakage of the lens, and ensure stability of the lens; the elastic ring can increase friction between the elastic ring and adjacent components such as the lens, the locking ring, and the spacer ring, reduce vibration of the lens during transportation and use, and reduce radial movement of the components to affect optical effects of the lens; the elastic ring can also play a buffering role between the two adjacent lenses, avoid direct contact between the lenses, and avoid breakage of an ink coating layer on the lens; when a gap is generated in the lens, the elastic ring can push other components to move to block the gap, form a relatively closed space, and improve waterproof and dustproof effects of the lens; by reasonably configuring a Poisson ratio of the elastic ring, the elastic ring can provide reasonable pre-pressure for the components, and prevent the lens from being cracked.

[0027] In a third aspect, the embodiments of the present application further provide a terminal comprising the camera module as described in the above technical solutions.

[0028] In the aforementioned terminal, the lens of the camera module is equipped with an elastic ring. When the field curvature of the lens is too large or too small, the locking ring is rotated to control the movement of various components such as lenses and spacers on the object side or image side of the elastic ring along the optical axis, thereby adjusting the air gap between adjacent lenses to adjust the field curvature and achieve the adjustment of the field curvature of the lens, so as to keep the field curvature of the lens consistent. Furthermore, by incorporating elastic rings, pre-stress is provided to the lens elements, preventing them from loosening and ensuring assembly stability. Elastic rings also prevent the locking force of the fastening rings from being transmitted to more fragile elements, preventing breakage and ensuring lens stability. Additionally, elastic rings increase friction between the rings and adjacent components such as lens elements, fastening rings, and spacers, reducing vibrations during transport and use, and minimizing radial movement that could affect the lens's optical performance. Elastic rings also act as a buffer between adjacent lens elements, preventing direct contact and damage to the coating. When gaps occur in the lens, the elastic rings deform to move other components and seal them, creating a relatively sealed space and improving the lens's waterproof and dustproof performance. By appropriately configuring the Poisson's ratio of the elastic rings, firstly, reasonable pre-stress is provided to all components, and secondly, the lens elements are prevented from being crushed. Attached Figure Description

[0029] Figure 1 This is a cross-sectional view of the lens along the optical axis provided in the first embodiment of this application.

[0030] Figure 2 yes Figure 1 The diagram shows the structure of the elastic ring in the lens.

[0031] Figure 3 This is a cross-sectional view of the lens along the optical axis provided in the second embodiment of this application.

[0032] Figure 4 yes Figure 2 The diagram shows the structure of the elastic ring in the lens.

[0033] Figure 5 This is a cross-sectional view of the lens along the optical axis provided in the third embodiment of this application.

[0034] Figure 6 yes Figure 3 The diagram shows the structure of the elastic ring in the lens.

[0035] Figure 7 This is a cross-sectional view of the lens along the optical axis provided in the fourth embodiment of this application.

[0036] Figure 8 This is a cross-sectional view of the lens along the optical axis provided in the fifth embodiment of this application.

[0037] Figure 9 is a schematic diagram of a cross section of the lens along the optical axis provided by the sixth embodiment of the present application.

[0038] Main element symbol explanation: lens 1, 2, 3, 4, 5, 6, lens barrel 10, light passing hole 11, bearing part 12, lens 20, locking ring 30, spacer ring 40, elastic ring 50, cutting groove 51, side groove 52, filter 60, optical axis 70. DETAILED DESCRIPTION

[0039] The embodiments of the present application will be described in detail below with reference to the drawings, in which the same or similar components have the same reference numerals throughout. The embodiments described below are exemplary and are for the purpose of explanation only and are not to be understood as limiting the present application.

[0040] In the description of the present application, it should be understood that the terms indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the purpose of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second" are for the purpose of description only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, it should be noted that the meaning of "a plurality of" is two or more, unless otherwise explicitly specified and limited.

[0041] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the term "connection" should be broadly understood, for example, it can be a fixed connection, or a detachable connection, or an integral connection; it can be a mechanical connection, or an electrical connection or can communicate with each other, it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above-mentioned term in the present application can be understood according to the specific circumstances.

[0042] Some embodiments of the present application will be described in detail below with reference to the drawings.

[0043] Please refer to Figure 1The embodiment of the present application provides a lens 1. The lens 1 comprises a lens barrel 10, a plurality of lenses 20, a locking ring 30, a spacer ring 40 and an elastic ring 50. Wherein, the lens 1 has an object side and an image side, the object side can be understood as the side where the object to be imaged is located, and the image side can be understood as the side where the image of the object to be imaged is located.

[0044] The lens barrel 10 is provided with a light passing hole 11 extending along the direction of the optical axis 70, and the inner side of the lens barrel 10 is provided with a bearing part 12 extending towards the direction of the light passing hole 11, the bearing part 12 protrudes from the inner wall of the lens barrel 10 along the direction perpendicular to the optical axis 70, in the embodiment, the bearing part 12 is located on the object side of the light passing hole 11, and the bearing part 12 is used for abutting the lens 20. Wherein, the inner wall of the lens barrel 10 is provided with an internal thread near the image side.

[0045] The plurality of lenses 20 are arranged in the light passing hole 11. In the embodiment, the number of lenses 20 is five, and the five lenses 20 are arranged at intervals, and the object side of the lens 20 located on the object side in the five lenses 20 abuts the image side of the bearing part 12.

[0046] The locking ring 30 is arranged in the light passing hole 11 and is threadedly connected with the object side and / or the image side of the lens barrel 10. In the embodiment, the outer side of the locking ring 30 is provided with an external thread, and the external thread of the locking ring 30 is engaged with the internal thread of the lens barrel 10 to achieve the thread connection between the locking ring 30 and the image side of the lens barrel 10.

[0047] The spacer ring 40 is arranged in the light passing hole 11 and arranged between two adjacent lenses 20. In the embodiment, the number of spacer rings 40 is four, and the four spacer rings 40 are arranged in the five lenses 20, and it can also be understood that each spacer ring 40 is arranged between two adjacent lenses 20. Wherein, the thickness of the spacer ring 40 along the direction of the optical axis 70 can be set according to actual needs, which is not limited in the embodiment of the present application. It can be understood that the bearing part 12 can also be equivalent to a spacer ring 40.

[0048] The elastic ring 50 is arranged in the light passing hole 11, the elastic ring 50 is a circular ring, the elastic ring 50 has elasticity, the elastic ring 50 can be elastically compressed along the direction of the optical axis 70, that is, the elastic ring 50 can be compressed to generate a pre-compression force, and the elastic ring 50 can elastically recover after the pressure is removed. The elastic ring 50 is arranged between two adjacent lenses 20, or the elastic ring 50 is arranged between the locking ring 30 and the lens 20 adjacent to the locking ring 30, or the elastic ring 50 is arranged between the spacer ring 40 and the lens 20 adjacent to the spacer ring 40. In the embodiment, the elastic ring 50 is arranged between the middle lens 20 and the spacer ring 40 adjacent to the object side of the middle lens 20.

[0049] The lens 1 of the embodiment can adjust the field curvature of the lens 1 by rotating the locking ring 30 to control the movement of the components such as the lens 20 and the spacer ring 40 on the object side or the image side of the elastic ring 50 along the direction of the optical axis 70, thereby adjusting the air gap between the adjacent lenses 20, to achieve the effect of adjusting the field curvature, so that the field curvature of the lens 1 remains consistent. In addition, the elastic ring 50 can also provide a pre-pressure for the lens 20 to prevent the lens 20 from loosening and ensure the stability of the lens 1. The locking force of the locking ring 30 can be prevented from being transmitted to the lens 20 which is more likely to be broken, thereby preventing the lens 20 from being broken and ensuring the stability of the lens 1. The friction between the elastic ring 50 and the adjacent components such as the lens 20 and the spacer ring 40 can be increased, thereby reducing the vibration of the lens 1 during transportation and use and reducing the radial movement of the components to affect the optical effect of the lens 1.

[0050] In the embodiment, the Poisson's ratio of the elastic ring 50 is 0.4-0.5, for example, 0.4, 0.41, 0.42, 0.43, 0.44, 0.45, 0.46, 0.47, 0.48, 0.49, 0.5, etc. The material of the elastic ring 50 can be an elastic material such as rubber, silicone, glue, latex, and polyurethane elastomer. In this way, by reasonably configuring the Poisson's ratio of the elastic ring 50, the elastic ring 50 can provide a reasonable pre-pressure for the components, and the lens 20 can be prevented from being cracked. However, when the Poisson's ratio of the elastic ring 50 is less than 0.4, the elastic ring 50 is too hard and is likely to crack the lens 20. When the Poisson's ratio of the elastic ring 50 is greater than 0.5, the radial deformation of the elastic ring 50 is large when it is compressed, which results in insufficient elasticity of the elastic ring 50 and the elastic ring 50 cannot effectively provide a reasonable pre-pressure for the components.

[0051] Please refer to Figure 2 In the embodiment, two cut grooves 51 are provided on the object side and the image side of the elastic ring 50 in the direction of the optical axis 70, and four cut grooves 51 are provided on the elastic ring 50 in the direction of the optical axis 70. The object side and the image side of the elastic ring 50 can also be understood as the object side surface and the image side surface of the elastic ring 50. In this way, the cut grooves 51 on the object side and the image side of the elastic ring 50 can achieve the effects of water vapor dissipation and gas circulation. In addition, the cut grooves 51 on the object side and the image side of the elastic ring 50 can ensure the elasticity and structural strength of the elastic ring 50. It can be understood that in other embodiments, the cut grooves 51 can be provided only on the object side or the image side of the elastic ring 50, and the number of the cut grooves 51 can be one, two, three, four or more.

[0052] In the embodiment, the groove bottom of the cutout 51 is a plane, and the distance between the groove bottom of the cutout 51 on the object side or the image side of the elastic ring 50 and the image side or the object side of the elastic ring 50 along the direction of the optical axis 70 is greater than or equal to 0.05 mm, for example, 0.05 mm, 0.06 mm, 0.07 mm, 0.08 mm, 0.09 mm, 1 mm, etc. In this way, by limiting the distance between the groove bottom of the cutout 51 and the image side or the object side to be greater than or equal to 0.05 mm, the structural strength of the elastic ring 50 is ensured.

[0053] It can be understood that in other embodiments, the groove bottom of the cutout 51 can also be a curved surface, a jagged surface, a wavy surface, etc., and the minimum distance between the groove bottom of the cutout 51 and the corresponding image side or object side is greater than or equal to 0.05 mm.

[0054] In the embodiment, the cross section of the elastic ring 50 along the direction of the optical axis 70 and passing through the geometric center is circular or semicircular. In this way, by limiting the shape of the cross section of the elastic ring 50, the surfaces on both sides of the elastic ring 50 along the direction of the optical axis 70 after compression can achieve planar contact with the corresponding lens 20 and spacer ring 40, so that the stress on the lens 20 is uniform.

[0055] It can be understood that in other embodiments, the cross section of the elastic ring 50 along the direction of the optical axis 70 and passing through the geometric center can also be elliptical or polygonal, and the polygonal shape can be quadrilateral, hexagonal, octagonal, etc.

[0056] In the embodiment, the lens 1 further comprises a filter 60. The filter 60 is arranged on the side of the locking ring 30 away from the plurality of lenses 20. In this way, by arranging the above-mentioned filter 60, the lens 1 has a filtering effect, improving the shooting performance of the lens 1.

[0057] Please refer to Figure 3 The second embodiment of the present application provides a lens 2. The lens 2 provided by the second embodiment is substantially similar in structure to the lens 1 provided by the first embodiment, and the difference is that in the embodiment, the number of lenses 20 is four, and the two lenses 20 in the middle are connected together. The bearing portion 12 of the lens barrel 10 is located inside the light passing hole 11, and the bearing portion 12 abuts against and bears between the two lenses 20 on the object side. The number of locking rings 30 is two, and the two locking rings 30 are respectively threadedly connected to the object side and the image side of the lens barrel 10. The number of spacer rings 40 is one, and the spacer ring 40 is arranged between the two lenses 20 on the image side. The elastic ring 50 is arranged between the image side of the bearing portion 12 and the lens 20 abutting against the image side of the bearing portion 12. The filter 60 is arranged on the locking ring 30 on the image side. In the embodiment, the bearing portion 12 can also be equivalent to a spacer ring 40.

[0058] Therefore, by arranging the elastic ring 50 between the bearing portion 12 and the lens 20 adjacent to the bearing portion 12, the lens 20 is prevented from being directly connected to the bearing portion 12, thereby avoiding the lens 20 from being broken. By arranging the elastic ring 50, when the field curvature of the lens 2 is large or small, the elastic ring 50 is rotated to control the movement of the components such as the lens 20 and the spacer ring 40 on the object side or the image side along the optical axis 70, thereby adjusting the air gap between the adjacent lenses 20 to adjust the field curvature, so as to adjust the field curvature of the lens 2 and keep the consistency of the field curvature of the lens 2. In addition, by arranging the elastic ring 50, the elastic ring 50 can also provide a pre-pressure for the lens 20 to prevent the lens 20 from loosening and ensure the stability of the assembly of the lens 2. By arranging the elastic ring 50, the locking force of the locking ring 30 can be prevented from being transmitted to the lens 20 which is more likely to be broken, thereby preventing the lens 20 from being broken and ensuring the stability of the lens 2. By arranging the elastic ring 50, the friction between the elastic ring 50 and the adjacent components such as the lens 20 and the spacer ring 40 can be increased, thereby reducing the vibration of the lens 2 during transportation and use and reducing the radial movement of the components to affect the optical effect of the lens 2.

[0059] Referring to Figure 4 In the embodiment, four edge grooves 52 are arranged on the outer circumferential side of the elastic ring 50 and recessed in the direction perpendicular to the optical axis 70. The four edge grooves 52 are arranged at equal intervals. The outer circumferential side of the elastic ring 50 can be understood as the outer circumferential side surface of the elastic ring 50. Therefore, by arranging the edge grooves 52 on the outer circumferential side of the elastic ring 50, the elastic ring 50 can realize the effects of water vapor dissipation and gas circulation through the edge grooves 52.

[0060] In the embodiment, the groove bottom of the edge groove 52 is a plane. The distance between the groove bottom of the edge groove 52 and the inner circumferential side of the elastic ring 50 in the direction perpendicular to the optical axis 70 is greater than or equal to 0.05 mm. The inner circumferential side of the elastic ring 50 can be understood as the inner circumferential side surface of the elastic ring 50. For example, 0.05 mm, 0.06 mm, 0.07 mm, 0.08 mm, 0.09 mm, 1 mm, etc. Therefore, by limiting the distance between the groove bottom of the edge groove 52 and the inner circumferential side to be greater than or equal to 0.05 mm, the structural strength of the elastic ring 50 is ensured.

[0061] It can be understood that in other embodiments, the groove bottom of the edge groove 52 can also be a curved surface, a jagged surface, a wavy surface, etc., and the minimum distance between the groove bottom of the edge groove 52 and the inner circumferential side is greater than or equal to 0.05 mm.

[0062] Referring to Figure 5 The third embodiment of the present application provides a lens 3. The lens 3 provided by the third embodiment is substantially similar to the lens 2 provided by the second embodiment, and the difference lies in that, in the embodiment, the elastic ring 50 is arranged between the locking ring 30 on the image side and the lens 20 adjacent to the locking ring 30 on the image side. Referring toFigure 6 In this embodiment, the elastic ring 50 is a circular ring. In this way, by setting the elastic ring 50 between the locking ring 30 and the lens 20, when the field curvature of the lens 3 is too large or too small, by rotating the locking ring 30, the components on the object side or the image side of the elastic ring 50 such as the lens 20 and the spacer ring 40 are controlled to move along the direction of the optical axis 70, thereby adjusting the air gap between the adjacent lenses 20 to achieve the effect of adjusting the field curvature, realizing the adjustment of the field curvature of the lens 3, and keeping the field curvature of the lens 3 consistent. In addition, by setting the elastic ring 50, the elastic ring 50 can also provide a pre-pressure for the lens 20 to prevent the lens 20 from loosening and ensure the stability of the assembly of the lens 3; by setting the elastic ring 50, the locking force of the locking ring 30 can also be prevented from being transmitted to the lens 20 which is more likely to be broken, thereby preventing the lens 20 from being broken and ensuring the stability of the lens 3; by setting the elastic ring 50, the friction between the elastic ring 50 and the adjacent components such as the lens 20 and the spacer ring 40 can also be increased, thereby reducing the vibration of the lens 3 during transportation and use and reducing the radial movement of the components to affect the optical effect of the lens 3; by setting the elastic ring 50, when a gap is generated on the image side of the lens 3, the elastic ring 50 can push other components to move to block the gap by deforming itself, thereby forming a relatively closed space and improving the waterproof and dustproof effect of the lens 3.

[0063] Please refer to Figure 7 The fourth embodiment of the present application provides a lens 4. The lens 4 provided by the fourth embodiment is substantially similar to the lens 2 provided by the second embodiment, and the difference lies in that, in this embodiment, the elastic ring 50 is located between the object side of the spacer ring 40 and the lens 20 adjacent to the object side of the spacer ring 40.

[0064] In this way, by setting the elastic ring 50 between the spacer ring 40 and the lens 20, when the field curvature of the lens 4 is too large or too small, by rotating the locking ring 30, the components on the object side or the image side of the elastic ring 50 such as the lens 20 and the spacer ring 40 are controlled to move along the direction of the optical axis 70, thereby adjusting the air gap between the adjacent lenses 20 to achieve the effect of adjusting the field curvature, realizing the adjustment of the field curvature of the lens 4, and keeping the field curvature of the lens 4 consistent. In addition, by setting the elastic ring 50, the elastic ring 50 can also provide a pre-pressure for the lens 20 to prevent the lens 20 from loosening and ensure the stability of the assembly of the lens 4; by setting the elastic ring 50, the locking force of the locking ring 30 can also be prevented from being transmitted to the lens 20 which is more likely to be broken, thereby preventing the lens 20 from being broken and ensuring the stability of the lens 4; by setting the elastic ring 50, the friction between the elastic ring 50 and the adjacent components such as the lens 20 and the spacer ring 40 can also be increased, thereby reducing the vibration of the lens 4 during transportation and use and reducing the radial movement of the components to affect the optical effect of the lens 4.

[0065] Please refer to Figure 8The fifth embodiment of the present application provides a lens 5. The lens 5 provided by the fifth embodiment is similar to the lens 1 provided by the first embodiment in structure, except that, in the present embodiment, the abutting portion 12 of the lens barrel 10 is located on the image side, the two lenses 20 on the object side are connected together, the number of the spacer rings 40 is three, and the three spacer rings 40 are arranged between the four lenses 20 on the image side. The locking ring 30 has an internal thread, the object side of the lens barrel 10 has an external thread, and the locking ring 30 is threadedly connected with the object side of the lens barrel 10. The elastic ring 50 is arranged between the two lenses 20 on the object side. Among them, the two lenses 20 on the object side are provided with an ink coating layer, and the elastic ring 50 is arranged between the two lenses 20 with the ink coating layer to avoid direct contact between the two lenses 20, avoid the ink coating layer on the lenses 20 from being broken, and ensure the normal use of the lens 5. In this way, by arranging the elastic ring 50 between the lenses 20, the elastic ring 50 can also play a buffering role between the adjacent two lenses 20, avoid direct contact between the lenses 20, and avoid the ink coating layer on the lenses 20 from being broken.

[0066] See Figure 9 The sixth embodiment of the present application provides a lens 6. The lens 6 provided by the sixth embodiment is similar to the lens 1 provided by the first embodiment in structure, except that, the number of the elastic ring 50 is two, one of the elastic rings 50 is arranged between the lens 20 on the object side and the abutting portion 12, and the other elastic ring 50 is arranged between the object side of the lens 20 in the middle and the spacer ring 40 adjacent to the object side of the lens 20 in the middle.

[0067] Thus, by arranging the elastic ring 50 between the spacer ring 40 and the lens 20 and between the lens 20 and the bearing portion 12, when the field curvature of the lens 6 is large or small, by rotating the locking ring 30, the components on the object side or the image side of the elastic ring 50, such as the lens 20 and the spacer ring 40, are moved in the direction of the optical axis 70, thereby adjusting the air gap between the adjacent lenses 20 to achieve the effect of adjusting the field curvature, achieving the adjustment of the field curvature of the lens 6, and keeping the field curvature of the lens 6 consistent. In addition, by arranging the elastic ring 50, the elastic ring 50 can also provide a pre-pressure for the lens 20 to prevent the lens 20 from loosening and ensure the stability of the assembly of the lens 6; by arranging the elastic ring 50, the locking force of the locking ring 30 can also be prevented from being transmitted to the lens 20 which is more prone to breakage, preventing the lens 20 from breaking and ensuring the stability of the lens 6; by arranging the elastic ring 50, the friction between the elastic ring 50 and the adjacent components such as the lens 20 and the spacer ring 40 can also be increased, reducing the vibration of the lens 6 during transportation and use, and reducing the radial movement of the components to affect the optical effect of the lens 6; by arranging the elastic ring 50, the elastic ring 50 can also play a buffering role between the two adjacent lenses 20, avoiding direct contact between the lenses 20 and avoiding the rupture of the ink coating layer on the lens 20; by arranging the elastic ring 50, when a gap is generated in the lens 6, the elastic ring 50 pushes other components to move to block the gap, forming a relatively closed space, and improving the waterproof and dustproof effect of the lens 6. When a gap is generated on the object side of the lens 6, the elastic ring 50 pushes other components to move to block the gap, forming a relatively closed space, and improving the waterproof and dustproof effect of the lens 6.

[0068] The seventh embodiment of the present application provides a camera module (not shown in the figure). The camera module of the present embodiment comprises the lens of any one of the first embodiment to the sixth embodiment, and the lens 1 of the first embodiment is taken as an example for description. The camera module of the present embodiment comprises a shell (not shown in the figure), a photosensitive chip (not shown in the figure) and the lens 1. The photosensitive chip is mounted in the shell, the shell is provided with a mounting hole (not shown in the figure), and the lens 1 is mounted in the mounting hole, and the lens 1 and the photosensitive chip are coaxially arranged along the direction of the optical axis 70. The photosensitive chip is used for receiving light signals passing through the lens 1 and converting them into electrical signals for imaging.

[0069] Therefore, the camera module has the following advantages. The elastic ring 50 is arranged in the lens 1. When the field curvature of the lens 1 is large or small, the elastic ring 50 is rotated to control the movement of the components such as the lens 20 and the spacer ring 40 on the object side or the image side of the elastic ring 50 along the direction of the optical axis 70, so as to adjust the air gap between the adjacent lenses 20, thereby adjusting the field curvature of the lens 1, keeping the field curvature of the lens 1 consistent. In addition, the elastic ring 50 can provide a pre-pressure for the lens 20, avoid loosening of the lens 20, and ensure the assembly stability of the lens 1. The elastic ring 50 can prevent the locking force of the locking ring 30 from being transmitted to the lens 20 which is easy to break, prevent the lens 20 from breaking, and ensure the stability of the lens 1. The elastic ring 50 can increase the friction between the elastic ring 50 and the adjacent components such as the lens 20, the locking ring 30 and the spacer ring 40, reduce the vibration of the lens 1 during transportation and use, and reduce the radial movement of the components to affect the optical effect of the lens 1. The elastic ring 50 can also play a buffering role between the adjacent two lenses 20, avoid direct contact between the lenses 20, and avoid breaking of the ink layer on the lens 20. When a gap is generated in the lens 1, the elastic ring 50 can push other components to move to block the gap, form a relatively closed space, and improve the waterproof and dustproof effect of the lens 1. By reasonably configuring the Poisson's ratio of the elastic ring 50, the elastic ring 50 can provide reasonable pre-pressure for the components, and prevent the lens 20 from being cracked.

[0070] The eighth embodiment of the present application also provides a terminal (not shown in the figure). The terminal of the present embodiment comprises the camera module of the seventh embodiment. The terminal of the present embodiment can be a car, and the camera module can be a vision sensor. It can be understood that in other embodiments, the terminal can also be a vehicle-mounted recorder, a security monitoring device, an AR device, a VR device, a mobile phone, a tablet computer, a smart watch and other devices with a lens 1.

[0071] The terminal, the lens 1 of the camera module thereof, by setting the elastic ring 50, when the field curvature of the lens 1 is large or small, by rotating the locking ring 30, the components such as the lens 20 and the spacer ring 40 on the object side or the image side of the elastic ring 50 are moved along the direction of the optical axis 70, thereby adjusting the air gap between adjacent lenses 20, so as to adjust the field curvature, realize the adjustment of the field curvature of the lens 1, and make the field curvature of the lens 1 consistent. In addition, by setting the elastic ring 50, the elastic ring 50 can also provide pre-pressure for the lens 20, avoid the lens 20 from loosening, and ensure the assembly stability of the lens 1; by setting the elastic ring 50, the locking force of the locking ring 30 can also be prevented from being transmitted to the lens 20 which is easy to break, so as to prevent the lens 20 from breaking and ensure the stability of the lens 1; by setting the elastic ring 50, the friction between the elastic ring 50 and adjacent components such as the lens 20, the locking ring 30 and the spacer ring 40 can also be increased, the vibration during transportation and use of the lens 1 can be reduced, and the radial movement of the components can also be reduced to affect the optical effect of the lens 1; by setting the elastic ring 50, the elastic ring 50 can also play a buffering role between the two adjacent lenses 20, avoid direct contact between the lenses 20, and avoid the rupture of the ink coating layer on the lens 20; by setting the elastic ring 50, when a gap is generated in the lens 1, the elastic ring 50 can push other components to move to block the gap, form a relatively closed space, and improve the waterproof and dustproof effect of the lens 1. By reasonably configuring the Poisson's ratio of the elastic ring 50, on the one hand, the elastic ring 50 can provide reasonable pre-pressure for the components, and on the other hand, the lens 20 can be prevented from being cracked.

[0072] It is apparent for those skilled in the art that the present application is not limited to the details of the foregoing exemplary embodiments, and the present application can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be considered in all respects as illustrative and not restrictive, and the scope of the present application is defined by the appended claims rather than the foregoing description, and it is intended to include all changes falling within the meaning and range of equivalents of the claims.

[0073] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application and are not limiting. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced equivalently without departing from the spirit and scope of the present application.

Claims

1. A lens, characterized in that, include: The lens barrel has a light-transmitting aperture extending along the optical axis; Multiple lenses are disposed within the light-transmitting hole; A locking ring is disposed within the light-transmitting hole and threadedly connected to the object side and / or image side of the lens barrel; A spacer ring is disposed within the light-transmitting hole and between two adjacent lenses; An elastic ring is disposed within the light-transmitting hole. The elastic ring is circular and has a Poisson's ratio of 0.4 to 0.

5. The elastic ring is disposed between two adjacent lenses, or between the locking ring and a lens adjacent to the locking ring, or between the spacer ring and a lens adjacent to the spacer ring.

2. The lens as described in claim 1, characterized in that, At least one of the object side and image side of the elastic ring has a groove recessed along the optical axis.

3. The lens as described in claim 2, characterized in that, When the groove is provided on both the object side and the image side of the elastic ring, the groove is spaced apart on the elastic ring in the direction surrounding the optical axis.

4. The lens as described in claim 2 or 3, characterized in that, The distance from the bottom of the groove opened on the object side or image side of the elastic ring to the image side or object side of the elastic ring along the optical axis is greater than or equal to 0.05 mm.

5. The lens as described in claim 1, characterized in that, The outer periphery of the elastic ring is provided with a side groove that is recessed in a direction perpendicular to the optical axis.

6. The lens as described in claim 5, characterized in that, The distance between the bottom of the side groove and the inner circumference of the elastic ring in a direction perpendicular to the optical axis is greater than or equal to 0.05 mm.

7. The lens as described in claim 1, characterized in that, A support portion is provided inside the light-transmitting hole, wherein one of the lenses abuts against the object side or image side of the support portion, and / or, wherein two adjacent lenses abut against the object side and image side of the support portion respectively, and the number of elastic rings is two, wherein one of the elastic rings is disposed between the support portion and the lens disposed adjacent to the support portion.

8. The lens as described in claim 1, characterized in that, The elastic ring has a circular, semi-circular, elliptical, or polygonal shape along the optical axis and passing through the geometric center.

9. A camera module, characterized in that, The device includes a housing, a photosensitive chip, and a lens as described in any one of claims 1 to 8. The photosensitive chip is installed inside the housing, the housing has a mounting hole, the lens is installed in the mounting hole, and the lens and the photosensitive chip are coaxially arranged along the optical axis.

10. A terminal, characterized in that, Includes the camera module as described in claim 9.

Images