Optical imaging lens

Abstract

The application provides an optical imaging lens. The optical imaging lens comprises a lens barrel, a plurality of lenses arranged at intervals along the axial direction of the lens barrel, and at least one spacer ring arranged between two adjacent lenses. The lens barrel has a first bearing surface, at least a part of the object side surface of the spacer ring bears against the first bearing surface, the lens located on the object side of the spacer ring has a second bearing surface, at least another part of the object side surface of the spacer ring bears against the second bearing surface, the lens located on the image side of the spacer ring has a third bearing surface, the image side surface of the spacer ring bears against the third bearing surface, and the projection of the third bearing surface on the first bearing surface at least partially overlaps. The application solves the problem of poor assembly stability of the large-difference optical imaging lens in the prior art.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of optical imaging devices, in particular to an optical imaging lens. BACKGROUND

[0002] With the popularity of personal electronic products and mobile communication products equipped with imaging devices such as mobile phones, the demand for small imaging lenses with high resolution and excellent imaging quality has increased significantly, especially small head, high image surface and large image surface lenses are favored by the industry. The step difference of small head lens and large image surface lens is large, and large step difference has always been the most difficult problem to overcome in the production stability and yield of lenses.

[0003] Generally, large step difference, large image surface and small head lenses generally use one metal spacer or one metal spacer transition to increase the assembly strength, which increases the cost of the lens. Moreover, in the assembly process of large step difference optical lenses, lens or spacer tilt is easy to occur, which reduces the assembly yield and ultimately affects the lens quality. At the same time, it causes reliability problems during reliability verification. For large image surface optical lenses, large step difference structure often occurs in the last three lenses. The transition of metal spacer between two large step difference lenses increases the strength, but there are constraints on the appearance and weight, which cannot effectively improve the assembly tilt problem, and also increases the cost of the lens. For small head and large image surface optical lenses, there is a large step difference in the entire structure. In the actual production process, problems such as assembly out of position or tilt often occur, which ultimately leads to a decrease in yield and quality.

[0004] That is, the large step difference optical imaging lens in the prior art has the problem of poor assembly stability. SUMMARY

[0005] The main purpose of the present application is to provide an optical imaging lens to solve the problem of poor assembly stability of the large step difference optical imaging lens in the prior art.

[0006] In order to achieve the above purpose, the present application provides an optical imaging lens, comprising: a lens barrel; a plurality of lenses, the plurality of lenses are arranged at intervals along the axial direction of the lens barrel; at least one spacer, the spacer is arranged between two adjacent lenses, the lens barrel has a first bearing surface, at least a part of the object side surface of the spacer bears against the first bearing surface, the lens located on the object side of the spacer has a second bearing surface, at least another part of the object side surface of the spacer bears against the second bearing surface, the lens located on the image side of the spacer has a third bearing surface, the image side surface of the spacer bears against the third bearing surface, and the projection of the third bearing surface on the first bearing surface at least partially overlaps.

[0007] Further, a bearing area c1 between the spacer ring and the first bearing surface and a bearing area c2 between the spacer ring and the third bearing surface satisfy: 0.5≤c1 / c2≤0.8.

[0008] Further, a projection of the third bearing surface to the second bearing surface does not overlap the second bearing surface.

[0009] Further, a projection of a geometric center of the third bearing surface to the first bearing surface is located in the first bearing surface.

[0010] Further, the second bearing surface has a light-absorbing layer, a thickness d1 of the light-absorbing layer is greater than or equal to 0.02 mm and less than or equal to 0.03 mm.

[0011] Further, the lens located on the object side of the spacer ring comprises an optical mechanism area and an optically effective area in a direction close to the optical axis, the optical mechanism area has the second bearing surface, a surface of the optical mechanism area is a rough surface, a roughness Ra of the rough surface is greater than or equal to 0.1 and less than or equal to 0.5.

[0012] Further, a surface of the optical mechanism area on the same side as the second bearing surface has a groove structure, the groove structure is located on a side of the second bearing surface close to the optical axis, a depth e1 of the groove structure is greater than or equal to 0.01 mm and less than or equal to 0.15 mm.

[0013] Further, the object side surface of the spacer ring comprises, in a direction close to the optical axis, a first abutting surface, a connecting surface and a second abutting surface connected in sequence, the first abutting surface abuts and bears against the first bearing surface, at least part of the second abutting surface abuts and bears against the second bearing surface, and the first abutting surface is closer to the image side surface of the spacer ring than the second abutting surface.

[0014] Further, the inner barrel wall of the lens barrel further comprises: a slope surface, one end of the slope surface is connected with the first bearing surface, and the slope surface is closer to the optical axis than the first bearing surface; an inner bottom surface, the inner bottom surface is connected with the other end of the slope surface, the inner bottom surface is closer to the object side of the optical imaging lens than the first bearing surface, and the inner bottom surface is closer to the optical axis than the slope surface, the connecting surface is arranged to be spaced apart from the slope surface, and the second abutting surface is arranged to be spaced apart from the inner bottom surface.

[0015] Further, a minimum distance X1 between the connecting surface and the slope surface is greater than or equal to 0.01 mm and less than or equal to 0.05 mm; and / or an included angle θ1 between the slope surface and the optical axis is greater than or equal to 15° and less than or equal to 35°; and / or an included angle θ2 between the connecting surface and the optical axis is greater than or equal to 15° and less than or equal to 35°.

[0016] Further, the plurality of lenses are divided into a first lens group and a second lens group, the first lens group is closer to the object side of the optical imaging lens than the second lens group, and the spacer ring is located in the second lens group.

[0017] Further, the optical imaging lens further comprises a light shielding paper, the light shielding paper is arranged between two lenses adjacent to each other in the first lens group.

[0018] Further, the image side of the light shielding paper has an ink layer, the thickness d3 of the ink layer is greater than or equal to 0.002 mm and less than or equal to 0.05 mm; and / or the width W1 of the ink layer is greater than or equal to 0.04 mm and less than or equal to 0.5 mm.

[0019] Further, the lens on the image side of the light shielding paper in the first lens group comprises: an object side connecting surface, the object side connecting surface is in abutment with the light shielding paper; a near optical axis connecting surface, the near optical axis connecting surface is connected with the object side connecting surface and is closer to the optical axis than the object side connecting surface; an inclined surface, one end of the inclined surface is connected with the object side connecting surface; a first supporting surface, the first supporting surface is away from the optical axis relative to the object side connecting surface, and the first supporting surface is away from the light shielding paper relative to the object side connecting surface, the other end of the inclined surface is connected with the first supporting surface, and the first supporting surface is parallel to the object side connecting surface; and an outer edge bearing surface, the outer edge bearing surface is connected with the first supporting surface and is arranged at an angle with the first supporting surface.

[0020] Further, the inner barrel wall of the lens barrel further comprises: a lap inclined surface, the lap inclined surface is in abutment with the inclined surface; a second supporting surface, one end of the second supporting surface is connected with the lap inclined surface, the lap inclined surface is closer to the object side end of the lens barrel relative to the second supporting surface, and the lap inclined surface is closer to the optical axis relative to the second supporting surface, the second supporting surface is perpendicular to the optical axis, and the second supporting surface is in abutment with the first supporting surface to support the lens on the image side of the light shielding paper; and an inner end surface, the inner end surface is connected with the other end of the second supporting surface, the inner end surface is perpendicular to the second supporting surface, and the inner end surface extends away from the lap inclined surface.

[0021] Further, the included angle θ4 between the lap inclined surface and the optical axis is greater than or equal to 15° and less than or equal to 35°.

[0022] Further, the contact area c3 between the first supporting surface and the second supporting surface is greater than or equal to 0.05 mm2 and less than or equal to 0.5 mm2.

[0023] The optical imaging lens comprises a lens barrel, a plurality of lenses and at least one spacer, the plurality of lenses are arranged at intervals along the axial direction of the lens barrel; the spacer is arranged between two adjacent lenses; the lens barrel has a first bearing surface, at least a part of the object side surface of the spacer bears against the first bearing surface; the lens on the object side of the spacer has a second bearing surface, at least another part of the object side surface of the spacer bears against the second bearing surface; the lens on the image side of the spacer has a third bearing surface, the image side surface of the spacer bears against the third bearing surface, and the projection of the third bearing surface on the first bearing surface at least partially overlaps.

[0024] By setting the spacer ring between two adjacent lenses, the spacer ring can absorb more stray light, reduce the reflection of light on the optical mechanism area of the lens, reduce the generation of stray light, and ensure the imaging quality of the optical imaging lens. At the same time, the spacer ring also plays a supporting role for the adjacent lenses, ensuring the assembly stability of the lenses in the lens barrel. The lens barrel has a first bearing surface, and at least a part of the object side surface of the spacer ring bears against the first bearing surface. This arrangement allows the pressure of the spacer ring to be directly applied to the lens barrel during the assembly process of the optical imaging lens, avoiding deformation of the spacer ring under pressure, and ensuring the structural strength of the spacer ring. At the same time, the first bearing surface of the lens barrel plays a supporting role for the spacer ring, avoiding the risk of the spacer ring tilting under pressure in a large-difference optical imaging lens, enhancing the assembly strength of the lens barrel and the spacer ring, improving the assembly yield of the lens barrel and the spacer ring, and thus ensuring the imaging quality of the optical imaging lens. The lens located on the object side of the spacer ring has a second bearing surface, and at least another part of the object side surface of the spacer ring bears against the second bearing surface. The lens located on the image side of the spacer ring has a third bearing surface, and the image side surface of the spacer ring bears against the third bearing surface. This arrangement ensures the assembly stability of the lenses in the lens barrel. The projection of the third bearing surface on the first bearing surface at least partially overlaps, which allows the pressure of the spacer ring to correspond to the pressure of the lens barrel to form a support, ensures the relative positions of the force points on the object side surface and the image side surface of the spacer ring, allows the forces on the object side surface and the image side surface of the spacer ring to cancel out, avoids the risk of the spacer ring tilting due to unbalanced force, improves the assembly strength of the spacer ring in the lens barrel, and ensures the imaging quality of the optical imaging lens.

[0025] In addition, the object side surface of the spacer ring simultaneously abuts against the lens barrel and the lens, and the projection of the third bearing surface on the first bearing surface at least partially overlaps. This arrangement greatly improves the problem of unstable assembly of a large-difference optical imaging lens, improves the assembly stability, and also effectively reduces the outer diameter of the lens located on the object side of the spacer ring, reduces the difficulty of lens forming, and ensures the forming quality of the lens. BRIEF DESCRIPTION OF DRAWINGS

[0026] The drawings accompanying the specification of this application form a part thereof, serve to provide further understanding of the application, and together with the description of the application, explain the application. The embodiments of the application illustrated in the drawings and their descriptions are not intended to limit the application unduly.

[0027] Figure 1 A structural schematic diagram of an optical imaging lens according to an optional embodiment of the application is shown;

[0028] Figure 2 An enlarged view of A in FIG. 4 is shown; Figure 1

[0029] Figure 3 An enlarged view of A in FIG. 4 is shown; Figure 1 ​Position relationship diagram of the diaphragm ring, lens and lens barrel;

[0030] Figure 4 Structure schematic diagram of the optical imaging lens showing another assembly relationship of the present application;

[0031] Figure 5 Structure schematic diagram of the optical imaging lens showing another assembly relationship of the present application; Figure 4 Enlarged view at B;

[0032] Figure 6 Structure schematic diagram of the optical imaging lens showing another assembly relationship of the present application; Figure 5 Position relationship diagram of the diaphragm ring, lens and lens barrel;

[0033] Figure 7 Structure schematic diagram of the optical imaging lens showing another assembly relationship of the present application; Figure 6 Enlarged view at C;

[0034] Figure 8 Ray stray light route diagram of the optical imaging lens of the present application.

[0035] Among them, the above-mentioned drawings include the following reference signs:

[0036] 10, lens barrel; 11, first bearing surface; 12, slope surface; 13, inner bottom surface; 14, lap bevel; 15, second support surface; 16, inner end surface; 20, lens; 21, second bearing surface; 211, light absorption layer; 22, third bearing surface; 23, object side connecting surface; 24, near optical axis connecting surface; 25, bevel; 26, first support surface; 27, outer edge bearing surface; 30, diaphragm ring; 31, first abutting surface; 32, connecting surface; 33, second abutting surface; 40, diaphragm paper; 41, ink layer; 50, first lens group; 60, second lens group. DETAILED DESCRIPTION

[0037] It should be noted that the embodiments and features in the embodiments in the present application can be combined with each other without conflict. The present application will be described in detail below with reference to the drawings and in combination with embodiments.

[0038] It should be noted that, unless otherwise specified, all technical and scientific terms used in the present application have the same meaning as that generally understood by those skilled in the art to which the present application belongs.

[0039] In the present application, unless otherwise specified, the orientation words such as "upper, lower, top, bottom" are generally directed to the directions shown in the drawings, or are directed to the vertical, perpendicular or gravity directions of the components themselves; similarly, for the convenience of understanding and description, "inner, outer" refers to the inner and outer relative to the contour of the components themselves, but the above orientation words are not used to limit the present application.

[0040] To address the problem of poor assembly stability in existing large-segment optical imaging lenses, this invention provides an optical imaging lens.

[0041] like Figures 1 to 8 As shown, the optical imaging lens includes a lens barrel 10, a plurality of lenses 20, and at least one spacer 30. The plurality of lenses 20 are spaced apart along the axial direction of the lens barrel 10. The spacer 30 is disposed between two adjacent lenses 20. The lens barrel 10 has a first bearing surface 11. At least a portion of the object side of the spacer 30 abuts against the first bearing surface 11. The lens 20 located on the object side of the spacer 30 has a second bearing surface 21. At least another portion of the object side of the spacer 30 abuts against the second bearing surface 21. The lens 20 located on the image side of the spacer 30 has a third bearing surface 22. The image side of the spacer 30 abuts against the third bearing surface 22. The projection of the third bearing surface 22 onto the first bearing surface 11 at least partially overlaps.

[0042] By placing the spacer 30 between two adjacent lenses 20, the spacer 30 can absorb more stray light, reduce the reflection of light on the optical structure area of ​​the lens 20, reduce the generation of stray light, and ensure the imaging quality of the optical imaging lens. At the same time, the spacer 30 also serves to support and hold the adjacent lenses 20, ensuring the assembly stability of the lenses 20 in the lens barrel 10. The lens barrel 10 has a first bearing surface 11, and at least a portion of the object side of the spacer 30 abuts against the first bearing surface 11. This arrangement ensures that during the assembly of the optical imaging lens, the pressure of the lens 20 on the spacer 30 is directly applied to the lens barrel 10, preventing deformation of the spacer 30 under pressure and ensuring the structural strength of the spacer 30. Meanwhile, the first bearing surface 11 of the lens barrel 10 provides support and backing for the spacer 30, preventing the spacer 30 from tilting under pressure in the large-step optical imaging lens, enhancing the assembly strength of the lens barrel 10 and the spacer 30, improving the assembly yield of the lens barrel 10 and the spacer 30, and thus ensuring the imaging quality of the optical imaging lens. The lens 20 located on the object side of the spacer 30 has a second bearing surface 21, and at least another part of the object side of the spacer 30 abuts against the second bearing surface 21. The lens 20 located on the image side of the spacer 30 has a third bearing surface 22, and the image side of the spacer 30 abuts against the third bearing surface 22. This arrangement ensures the assembly stability of the lens 20 in the lens barrel 10. The projection of the third bearing surface 22 onto the first bearing surface 11 at least partially overlaps. This arrangement ensures that the pressure on the spacer 30 from the lens 20 corresponds to the pressure on the spacer 30 from the lens barrel 10, thus forming a support. This ensures that the force points on the object side and image side of the spacer 30 are in relative positions, allowing the forces on the object side and image side of the spacer 30 to cancel each other out. This avoids the risk of the spacer 30 tilting due to unbalanced forces, improves the assembly strength of the spacer 30 in the lens barrel 10, and ensures the imaging quality of the optical imaging lens.

[0043] In addition, the object side surface of the spacer ring 30 is in abutment with both the lens barrel 10 and the lens 20, and the projection of the third bearing surface 22 onto the first bearing surface 11 at least partially overlaps the first bearing surface 11. This arrangement greatly improves the assembly stability of the optical imaging lens with a large gap, improves the assembly stability, effectively reduces the outer diameter of the lens 20 on the object side of the spacer ring 30, reduces the difficulty of forming the lens 20, and ensures the forming quality of the lens 20.

[0044] It should be noted that the lens 20 and the lens barrel 10 are fixed by laser welding. This arrangement helps to improve reliability and further enhances the assembly strength between the lens 20 and the lens barrel 10, thereby improving the imaging quality of the optical imaging lens.

[0045] It should be noted that the lens 20 is a plastic lens, and the lens barrel 10 is a plastic lens barrel.

[0046] As shown in FIGS. Figure 1 and Figure 2 The bearing area c1 between the spacer ring 30 and the first bearing surface 11 and the bearing area c2 between the spacer ring 30 and the third bearing surface 22 satisfy 0.5≤c1 / c2≤0.8. This arrangement ensures that the stress points of the object side surface of the spacer ring 30 and the image side surface of the spacer ring 30 are in relative positions, avoids the risk of tilting of the spacer ring 30 due to unbalanced stress, improves the assembly strength of the spacer ring 30 in the lens barrel 10, and ensures the imaging quality of the optical imaging lens.

[0047] Specifically, the projection of the third bearing surface 22 onto the second bearing surface 21 does not overlap the second bearing surface 21. This arrangement avoids the third bearing surface 22 being too large, which makes the spacer ring 30 thick and heavy, which is not conducive to the thinness of the spacer ring 30, and also causes the spacer ring 30 to block the imaging light, affecting the integrity of the imaging.

[0048] In this embodiment, the projection of the geometric center of the third bearing surface 22 onto the first bearing surface 11 is located in the first bearing surface 11. Generally, the stress point of the third bearing surface 22 subjected to the extrusion of the lens 20 is located at the geometric center of the third bearing surface 22, and the projection of the geometric center of the third bearing surface 22 onto the first bearing surface 11 is located in the first bearing surface 11, so that the first bearing surface 11 can offset the force at the geometric center of the third bearing surface 22, thereby effectively avoiding displacement and deformation of the spacer ring.

[0049] Specifically, the second bearing surface 21 has the light-absorbing layer 211, and a thickness d1 of the light-absorbing layer 211 is greater than or equal to 0.02 mm and less than or equal to 0.03 mm. The second bearing surface 21 has the light-absorbing layer 211, which is configured to effectively fill a gap between the spacer ring 30 and the lens 20, to bond the spacer ring 30 and the lens 20 together, to ensure the connection strength between the spacer ring 30 and the lens 20, and to improve reliability. Meanwhile, the light-absorbing layer 211 is configured to further absorb stray light, to reduce reflection of light on an optical mechanism area of the lens 20, to reduce generation of stray light, and to increase imaging quality of the optical imaging lens. If the thickness d1 of the light-absorbing layer 211 is less than 0.02 mm, the thickness of the light-absorbing layer 211 is too small, which is likely to cause a gap between the spacer ring 30 and the lens 20, to cause a risk of separation of the spacer ring 30 and the lens 20, and to affect assembly stability of the spacer ring 30 and the lens 20. If the thickness d1 of the light-absorbing layer 211 is greater than 0.03 mm, the thickness of the light-absorbing layer 211 is too large, which is likely to cause incompatibility of the spacer ring 30 and the lens 20. Limiting the thickness d1 of the light-absorbing layer 211 to a range of 0.02 mm to 0.03 mm is conducive to stable assembly of the spacer ring 30 and the lens 20.

[0050] It should be noted that the light-absorbing layer 211 is an ink coating layer.

[0051] Specifically, the lens 20 located on the object side of the spacer ring 30 includes an optical mechanism area and an optical effective area along a direction close to an optical axis, the optical mechanism area has the second bearing surface 21, and a surface of the optical mechanism area is a rough surface, and a roughness Ra of the rough surface is greater than or equal to 0.1 and less than or equal to 0.5. Limiting the roughness Ra of the rough surface to a range of 0.1 to 0.5 enhances friction of the surface of the optical mechanism area, facilitates adhesion of the light-absorbing layer 211, avoids a risk of falling of the light-absorbing layer 211, increases connection strength of the spacer ring 30 and the lens 20, ensures connection tightness of the spacer ring 30 and the lens 20, and enables the light-absorbing layer 211 to work stably to reduce generation of stray light and ensure imaging stability of the optical imaging lens.

[0052] As Figure 2As shown, the surface on the same side of the optical mechanism area and the second bearing surface 21 has a groove structure, the groove structure is located on the side of the second bearing surface 21 away from the optical axis, and the depth e1 of the groove structure is greater than or equal to 0.01 millimeters and less than or equal to 0.15 millimeters. The surface on the same side of the optical mechanism area and the second bearing surface 21 has a groove structure, which can avoid the overflow of the light-absorbing layer 211 to the optical effective area of the lens 20, thereby affecting the transmission of light in the optical effective area. If the depth e1 of the groove structure is less than 0.01 millimeters, the light-absorbing layer 211 is easy to overflow to the optical effective area of the lens 20. If the depth e1 of the groove structure is greater than 0.15 millimeters, the depth of the groove structure is too large, which is not conducive to the assembly of the lens 20. Limiting the depth e1 of the groove structure to the range of 0.01 millimeters to 0.15 millimeters can ensure that the lens 20 is easy to assemble while reducing the overflow of the light-absorbing layer 211 to the optical effective area of the lens 20.

[0053] As shown in the figure, Figure 3 As shown, the object side of the spacer ring 30 includes a first abutting surface 31, a connecting surface 32 and a second abutting surface 33 connected in sequence towards the direction close to the optical axis, the first abutting surface 31 abuts against the first bearing surface 11, at least part of the second abutting surface 33 abuts against the second bearing surface 21, and the first abutting surface 31 is closer to the image side of the spacer ring 30 than the second abutting surface 33. By abutting the first abutting surface 31 against the first bearing surface 11, the lens barrel 10 plays a role of bearing and supporting the spacer ring 30, which can effectively prevent the spacer ring 30 from deforming and ensure the structural strength of the spacer ring 30. By abutting at least part of the second abutting surface 33 against the second bearing surface 21, the lens 20 plays a role of bearing the spacer ring 30, which ensures that the lens 20 can be stably assembled in the lens barrel 10. The first abutting surface 31 is closer to the image side of the spacer ring 30 than the second abutting surface 33, which is conducive to enhancing the lightness of the spacer ring 30 and reducing the possibility of deformation of the spacer ring 30. In addition, the object side of the spacer ring 30 bears against the lens barrel 10 and the lens 20 respectively, which avoids the inclination of the spacer ring 30 due to uneven stress and further avoids the risk of inclination of the lens 20, greatly improves the assembly strength of the spacer ring 30 and the lens 20 in the lens barrel 10, improves the reliability, and also effectively reduces the outer diameter of the lens 20 on the object side of the spacer ring 30, reduces the difficulty of forming the lens 20, and ensures the forming quality of the lens 20.

[0054] Specifically, the inner barrel wall of the lens barrel 10 further comprises a slope surface 12 and an inner bottom surface 13. The slope surface 12 is connected with the first bearing surface 11 at one end, and the slope surface 12 is close to the optical axis relative to the first bearing surface 11. The inner bottom surface 13 is connected with the other end of the slope surface 12, the inner bottom surface 13 is close to the object side of the optical imaging lens relative to the first bearing surface 11, and the inner bottom surface 13 is close to the optical axis relative to the slope surface 12. The connecting surface 32 is arranged in a spaced manner with the slope surface 12, and the second abutting surface 33 is arranged in a spaced manner with the inner bottom surface 13. The inner bottom surface 13 and the second abutting surface 33 are arranged in a spaced manner, which provides a certain deformation space for the spacer ring 30, and facilitates the assembly of the spacer ring 30 and the lens 20 into the lens barrel 10. At the same time, it will not affect the bearing strength of the spacer ring 30 between the lenses 20 located on the object side of the spacer ring 30, and ensure the bearing force of the spacer ring 30 on the lens 20, thereby avoiding the misalignment or inclination of the lens 20 and the spacer ring 30, and ensuring the stability of the spacer ring 30 and the lens 20.

[0055] As shown in Figure 2 The minimum distance X1 between the connecting surface 32 and the slope surface 12 is greater than or equal to 0.01 mm and less than or equal to 0.05 mm. Limiting the minimum distance X1 between the connecting surface 32 and the slope surface 12 within the range of 0.01 mm to 0.05 mm can effectively eliminate the phenomenon of unstable assembly caused by slight deformation of the spacer ring 30, thereby ensuring the stability of the lens 20 and ensuring the imaging quality. The connecting surface 32 and the slope surface 12 are arranged in a spaced manner, so that the spacer ring 30 has a certain deformation space, facilitating the assembly of the spacer ring 30 and the lens 20 into the lens barrel 10.

[0056] Specifically, the included angle θ1 between the slope surface 12 and the optical axis is greater than or equal to 15° and less than or equal to 35°. Limiting the included angle θ1 between the slope surface 12 and the optical axis within the range of 15° to 35° can effectively eliminate the phenomenon of unstable assembly caused by slight deformation of the spacer ring 30, thereby ensuring the stability of the lens 20, and at the same time, can ensure the absorption of stray light by the lens barrel 10, and ensure the imaging quality.

[0057] Preferably, the included angle θ1 between the slope surface 12 and the optical axis is 20°.

[0058] Specifically, the included angle θ2 between the connecting surface 32 and the optical axis is greater than or equal to 15° and less than or equal to 35°. Limiting the included angle θ2 between the connecting surface 32 and the optical axis within the range of 15° to 35° reduces the possibility of deformation of the spacer ring 30, which can ensure the structural strength of the spacer ring 30 while absorbing as much stray light as possible, reducing the generation of stray light, and improving the imaging quality of the optical imaging lens.

[0059] Preferably, the included angle θ2 between the connecting surface 32 and the optical axis is 20°.

[0060] It should be noted that the slope surface 12 and the connecting surface 32 are in a parallel relationship.

[0061] As shown in Figures 4 to 8 The plurality of lenses 20 are divided into a first lens group 50 and a second lens group 60, the first lens group 50 is close to the object side of the optical imaging lens relative to the second lens group 60, and the spacer ring 30 is located in the second lens group 60. The spacer ring 30 is located in the second lens group 60, the optical imaging lens has a large step difference in the second lens group 60, and the position of the large step difference in the second lens group 60 is relatively random, so that the position of the spacer ring 30 can also be assembled according to the position of the large step difference. The structure of the lens barrel 10 needs to be adjusted according to the position of the large step difference, and the degree of freedom of the design of the optical imaging lens is larger.

[0062] Specifically, the optical imaging lens further comprises a light shielding paper 40, and the light shielding paper 40 is arranged between two adjacent lenses 20 in the first lens group 50. By arranging the light shielding paper 40 between the two adjacent lenses 20 in the first lens group 50, the light shielding paper 40 plays a supporting role for the two adjacent lenses 20, ensuring the assembly stability of the lenses 20 in the lens barrel 10. At the same time, the arrangement of the light shielding paper 40 can shield stray light, reduce the reflection of light on the optical mechanism area of the lens 20, and reduce the generation of stray light, thereby ensuring the imaging quality of the optical imaging lens.

[0063] As shown in Figure 5 The image side of the light shielding paper 40 has an ink layer 41, and the thickness d3 of the ink layer 41 is greater than or equal to 0.002 mm and less than or equal to 0.05 mm. By arranging the ink layer 41 on the image side of the light shielding paper 40, the ink layer 41 can effectively fill the gap between the light shielding paper 40 and the lens 20, so that the light shielding paper 40 and the lens 20 are adhered together, thereby ensuring the connection strength between the light shielding paper 40 and the lens 20 and improving the reliability. At the same time, the arrangement of the ink layer 41 can further absorb stray light, reduce the reflection of light on the optical mechanism area of the lens 20, and reduce the generation of stray light, thereby increasing the imaging quality of the optical imaging lens. If the thickness d3 of the ink layer 41 is less than 0.002 mm, the thickness of the ink layer 41 is too small, which is easy to cause a gap between the light shielding paper 40 and the lens 20, thereby causing the risk of separation of the light shielding paper 40 and the lens 20, thereby affecting the assembly stability of the light shielding paper 40 and the lens 20. If the thickness d3 of the ink layer 41 is greater than 0.05 mm, the thickness of the ink layer 41 is too large, which is easy to cause the light shielding paper 40 and the lens 20 to be not adapted. Limiting the thickness d3 of the ink layer 41 to the range of 0.002 mm to 0.05 mm is conducive to realizing the stable assembly of the light shielding paper 40 and the lens 20.

[0064] Specifically, the width W1 of the ink layer 41 is greater than or equal to 0.04 mm and less than or equal to 0.5 mm. If the width W1 of the ink layer 41 is less than 0.04 mm, the area of ​​the ink layer 41 is too small, affecting the connection strength between the light-shielding paper 40 and the lens 20. If the width W1 of the ink layer 41 is greater than 0.5 mm, the area of ​​the ink layer 41 is too large, making it easy for the ink layer 41 to overflow into the optically effective area of ​​the lens 20, thereby affecting the transmission of light within the optically effective area and affecting the integrity of the image. Limiting the width W1 of the ink layer 41 to the range of 0.04 mm to 0.5 mm can ensure the connection strength between the light-shielding paper 40 and the lens 20 while preventing the ink layer 41 from overflowing into the optically effective area of ​​the lens 20.

[0065] Preferably, the width W1 of the ink layer 41 is 0.04 mm.

[0066] like Figure 6 and Figure 7 As shown, the lens 20 located on the image side of the light-shielding paper 40 within the first lens group 50 includes an object-side connecting surface 23, a near-optical axis connecting surface 24, a first support surface 26, an inclined surface 25, and an outer edge bearing surface 27. The object-side connecting surface 23 abuts against the light-shielding paper 40; the near-optical axis connecting surface 24 is connected to the object-side connecting surface 23 and is closer to the optical axis than the object-side connecting surface 23; one end of the inclined surface 25 is connected to the object-side connecting surface 23; the first support surface 26 is farther from the optical axis than the object-side connecting surface 23 and is also farther from the light-shielding paper 40 than the object-side connecting surface 23; the other end of the inclined surface 25 is connected to the first support surface 26 and is parallel to the object-side connecting surface 23; the outer edge bearing surface 27 is connected to the first support surface 26 and is angled to the first support surface 26.

[0067] The light shielding paper 40 is in abutment with the object side connecting surface 23, so that the light shielding paper 40 plays a role of receiving and protecting the lens 20, and can effectively shield the light transmitted in the optical mechanism area of the lens 20, thereby reducing the generation of stray light and improving the imaging quality of the optical imaging lens. The near-optical axis connecting surface 24 is connected with the object side connecting surface 23 and is close to the optical axis relative to the object side connecting surface 23. This arrangement is conducive to reducing the thickness of the optical mechanism area of the lens 20, so that the lens 20 is easier to assemble, thereby effectively reducing the assembly difficulty. One end of the inclined surface 25 is connected with the object side connecting surface 23. The first supporting surface 26 is away from the optical axis relative to the object side connecting surface 23, and the first supporting surface 26 is away from the light shielding paper 40 relative to the object side connecting surface 23. The other end of the inclined surface 25 is connected with the first supporting surface 26, and the first supporting surface 26 is parallel to the object side connecting surface 23. This arrangement ensures the assembly of the lens 20 and the light shielding paper 40, and can reduce the assembly difficulty of the lens 20 and the light shielding paper 40 in the lens barrel 10, thereby ensuring the assembly stability of the optical imaging lens. By arranging the outer edge bearing surface 27 at an angle relative to the first supporting surface 26, the assembly strength of the lens 20 is greatly improved, thereby further avoiding the shaking of the lens 20 in the lens barrel 10, and ensuring the imaging quality of the optical imaging lens.

[0068] Specifically, the inner barrel wall of the lens barrel 10 further comprises a lap joint inclined surface 14, a second supporting surface 15 and an inner end surface 16. The lap joint inclined surface 14 is arranged at an interval relative to the inclined surface 25. One end of the second supporting surface 15 is connected with the lap joint inclined surface 14. The lap joint inclined surface 14 is close to the object side end of the lens barrel 10 relative to the second supporting surface 15, and the lap joint inclined surface 14 is close to the optical axis relative to the second supporting surface 15. The second supporting surface 15 is perpendicular to the optical axis. The second supporting surface 15 is in abutment with the first supporting surface 26 to support the lens 20 located on the image side of the light shielding paper 40. The inner end surface 16 is connected with the other end of the second supporting surface 15. The inner end surface 16 is perpendicular to the second supporting surface 15, and the inner end surface 16 extends away from the lap joint inclined surface 14.

[0069] It should be noted that the lap joint inclined surface 14 and the inclined surface 25 are in parallel relationship.

[0070] Specifically, the included angle θ4 between the lap joint inclined surface 14 and the optical axis is greater than or equal to 15° and less than or equal to 35°. Limiting the included angle θ4 between the lap joint inclined surface 14 and the optical axis to the range of 15° to 35° can effectively eliminate the assembly instability phenomenon caused by slight deformation of the light shielding paper 40, thereby ensuring the stability of the lens 20 bearing and ensuring the imaging quality. Preferably, the included angle θ4 between the lap joint inclined surface 14 and the optical axis is 20°.

[0071] It should be noted that the angle θ3 between the inclined surface 25 and the optical axis is greater than or equal to 15° and less than or equal to 35°. Preferably, the angle θ3 between the inclined surface 25 and the optical axis is 20°. The minimum distance X3 between the overlapping inclined surface 14 and the inclined surface 25 is greater than or equal to 0.01 mm and less than or equal to 0.15 mm.

[0072] Optionally, the contact area c3 between the first support surface 26 and the second support surface 15 is greater than or equal to 0.05 mm2 and less than or equal to 0.5 mm2. If the contact area c3 between the first support surface 26 and the second support surface 15 is less than 0.05 mm2, the contact area between the first support surface 26 and the second support surface 15 is too small, which is not conducive to the stability of the bearing. If the contact area c3 between the first support surface 26 and the second support surface 15 is greater than 0.5 mm2, the contact area between the first support surface 26 and the second support surface 15 is too large, which increases the assembly strength of the lens 20 and the lens barrel 10, but also increases the difficulty of mounting and dismounting the lens 20 and the lens barrel 10, making the lens 20 not easy to dismount, and is not conducive to the thinning of the lens barrel 10. Limiting the contact area c3 between the first support surface 26 and the second support surface 15 to the range of 0.05 mm2 to 0.5 mm2 is conducive to realizing the stable assembly of the lens 20, while ensuring the thinning of the lens barrel 10.

[0073] Obviously, the above-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 skilled in the art without creative labor should belong to the scope of protection of the present application.

[0074] It should be noted that the terms used herein are only intended to describe specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. As used herein, the singular form is intended to include the plural form unless the context clearly indicates otherwise, and it should also be understood that the terms "comprise" and / or "include" as used in the specification indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0075] It should be noted that the terms "first", "second", and the like in the specification and claims of the present application and the above-described drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0076] The above merely provides the preferred embodiments of the present application, and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the principles and technical scope of the present application shall fall into the scope of the present application.

Claims

1. An optical imaging lens, characterized in that, The optical imaging lens comprises: a lens barrel (10); a plurality of lenses (20) arranged along an axial direction of the lens barrel (10); at least one spacer ring (30) arranged between two adjacent lenses (20), the lens barrel (10) has a first bearing surface (11), at least a part of an object side surface of the spacer ring (30) bears against the first bearing surface (11), a lens (20) located on the object side of the spacer ring (30) has a second bearing surface (21), at least another part of the object side surface of the spacer ring (30) bears against the second bearing surface (21), a lens (20) located on the image side of the spacer ring (30) has a third bearing surface (22), the image side surface of the spacer ring (30) bears against the third bearing surface (22), a projection of the third bearing surface (22) on the first bearing surface (11) at least partially coincides with the first bearing surface (11); a bearing area c1 between the spacer ring (30) and the first bearing surface (11) and a bearing area c2 between the spacer ring (30) and the third bearing surface (22) satisfy: 0.5≤c1 / c2≤0.8; a projection of the third bearing surface (22) on the second bearing surface (21) does not coincide with the second bearing surface (21); a projection of a geometric center of the third bearing surface (22) on the first bearing surface (11) is located in the first bearing surface (11); the object side surface of the spacer ring (30) and the image side surface of the spacer ring (30) are arranged in relative positions such that forces acting on the object side surface of the spacer ring (30) and the image side surface of the spacer ring (30) can be counteracted; the object side surface of the spacer ring (30) comprises, in sequence, a first abutting surface (31), a connecting surface (32) and a second abutting surface (33) which are connected in sequence, the first abutting surface (31) abuts against the first bearing surface (11), at least a part of the second abutting surface (33) abuts against the second bearing surface (21), and the first abutting surface (31) is closer to the image side surface of the spacer ring (30) than the second abutting surface (33); the inner wall of the lens barrel (10) further comprises: a slope surface (12) connected to the first bearing surface (11) at one end, and the slope surface (12) is closer to the optical axis than the first bearing surface (11); an inner bottom surface (13) connected to the other end of the slope surface (12), the inner bottom surface (13) is closer to the object side of the optical imaging lens than the first bearing surface (11), and the inner bottom surface (13) is closer to the optical axis than the slope surface (12), the connecting surface (32) is arranged apart from the slope surface (12), and the second abutting surface (33) is arranged apart from the inner bottom surface (13).

2. The optical imaging lens according to claim 1, wherein the second bearing surface (21) has a light-absorbing layer (211) with a thickness d1 greater than or equal to 0.02 mm and less than or equal to 0.03 mm. 3.The optical imaging lens according to claim 1, wherein, The lens (20) located on the object side of the spacer ring (30) comprises an optical mechanism area and an optically effective area in the direction close to the optical axis, the optical mechanism area has the second abutting surface (21), the surface of the optical mechanism area is a rough surface, and the roughness Ra of the rough surface is greater than or equal to 0.1 and less than or equal to 0.

5.

4. The optical imaging lens according to claim 3, characterized in that, The surface on the same side as the second abutting surface (21) of the optical mechanism area has a groove structure, the groove structure is located on the side of the second abutting surface (21) close to the optical axis, the depth e1 of the groove structure is greater than or equal to 0.01 mm and less than or equal to 0.15 mm.

5. The optical imaging lens according to claim 1, wherein, the minimum distance X1 between the connecting surface (32) and the slope surface (12) is greater than or equal to 0.01 mm and less than or equal to 0.05 mm; and / or the included angle θ1 between the slope surface (12) and the optical axis is greater than or equal to 15° and less than or equal to 35°; and / or the included angle θ2 between the connecting surface (32) and the optical axis is greater than or equal to 15° and less than or equal to 35°. 6.The optical imaging lens according to any one of claims 1 to 5, wherein, A plurality of the lenses (20) are divided into a first lens group (50) and a second lens group (60), the first lens group (50) is located on the object side of the optical imaging lens relative to the second lens group (60), and the spacer ring (30) is located in the second lens group (60).

7. The optical imaging lens according to claim 6, characterized in that, The optical imaging lens further comprises a light shielding paper (40), and the light shielding paper (40) is arranged between two adjacent lenses (20) in the first lens group (50). 8.The optical imaging lens according to claim 7, wherein, The image side surface of the light shielding paper (40) has an ink layer (41), the thickness d3 of the ink layer (41) is greater than or equal to 0.002 mm and less than or equal to 0.05 mm; and / or the width W1 of the ink layer (41) is greater than or equal to 0.04 mm and less than or equal to 0.5 mm. 9.The optical imaging lens according to claim 7, wherein, The lens (20) located on the image side of the light shielding paper (40) in the first lens group (50) comprises: an object side connecting surface (23) abutting against the light shielding paper (40); a near optical axis connecting surface (24) connected with the object side connecting surface (23) and close to the optical axis relative to the object side connecting surface (23); an inclined surface (25) having one end connected with the object side connecting surface (23); a first supporting surface (26) away from the optical axis relative to the object side connecting surface (23) and away from the light shielding paper (40) relative to the object side connecting surface (23), the other end of the inclined surface (25) is connected with the first supporting surface (26), and the first supporting surface (26) is parallel to the object side connecting surface (23); an outer edge abutting surface (27) connected with the first supporting surface (26) and arranged at an angle with the first supporting surface (26).

10. The optical imaging lens according to claim 9, characterized in that, The inner barrel wall of the lens barrel (10) further comprises: A lap inclined surface (14) is provided spaced from the inclined surface (25); A second support surface (15) is connected at one end to the lap inclined surface (14), the lap inclined surface (14) is closer to the object side end of the lens barrel (10) relative to the second support surface (15), and the lap inclined surface (14) is closer to the optical axis relative to the second support surface (15), the second support surface (15) is perpendicular to the optical axis, the second support surface (15) is in abutment with the first support surface (26) to support the lens (20) on the image side of the light shielding paper (40); An inner end surface (16) is connected at the other end to the second support surface (15), the inner end surface (16) is perpendicular to the second support surface (15), and the inner end surface (16) extends in a direction away from the lap inclined surface (14).

11. The optical imaging lens according to claim 10, characterized in that, An included angle θ4 between the lap inclined surface and the optical axis is greater than or equal to 15° and less than or equal to 35°.

12. The optical imaging lens according to claim 10, characterized in that, A contact area c3 between the first support surface and the second support surface is greater than or equal to 0.05 square millimeters and less than or equal to 0.5 square millimeters.

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