CN212623276U - Optical imaging lens - Google Patents

Abstract

The utility model provides an optical imaging lens. The optical imaging lens includes a lens barrel; a plurality of lenses arranged at intervals in an axial direction of the lens barrel; the lens barrel is provided with a first bearing surface, at least one part of the object side surface of the space ring is in bearing contact with the first bearing surface, the lens positioned on the object side of the space ring is provided with a second bearing surface, at least another part of the object side surface of the space ring is in bearing contact with the second bearing surface, the lens positioned on the image side of the space ring is provided with a third bearing surface, the image side surface of the space ring is in bearing contact with the third bearing surface, and the projection of the third bearing surface to the first bearing surface is at least partially overlapped. The utility model provides a big poor optical imaging lens of section have the poor problem of assemblage poor stability among the prior art.

Description

Optical imaging lens

Technical Field

The utility model relates to an optical imaging equipment technical field particularly, relates to an optical imaging camera lens.

Background

With the popularization of personal electronic products and mobile communication products equipped with imaging devices, such as mobile phones, the demand for miniaturized imaging lenses has greatly increased, and particularly, small-head, high-image-plane and large-image-plane lenses are favored by the industry, and the large-section difference is always the most difficult problem to overcome, which affects the production stability and yield of the lenses.

The general large-step large-image-plane and small-head lens generally adopts a metal space ring or a light shielding sheet and a metal space ring for transition so as to increase the assembling strength, thereby increasing the cost of the lens. In addition, in the assembly process of the large-step-difference optical lens, the lens or the spacer is prone to tilt, the assembly yield is reduced, and the quality of the lens is affected finally. Meanwhile, poor reliability is caused in the process of verifying the reliability. For an optical lens with a large image plane, a large-section-difference structure is often arranged at the back three lenses, and a metal spacer ring can increase certain strength when being used for transition of the two lenses with the large-section difference, but the problems of assembly and inclination cannot be effectively improved due to the constraint of appearance and weight, and the cost of the lens is increased; for an optical lens with a small head and a large image plane, a large section difference exists in the whole structure, and the problem of poor assembly or inclination frequently occurs in the actual production process, so that the yield is reduced and the quality is reduced.

That is to say, the large-step optical imaging lens in the prior art has the problem of poor assembly stability.

SUMMERY OF THE UTILITY MODEL

A primary object of the present invention is to provide an optical imaging lens, which solves the problem of poor assembling stability of the optical imaging lens with large segment difference in the prior art.

In order to achieve the above object, the present invention provides an optical imaging lens, including: a lens barrel; a plurality of lenses arranged at intervals in an axial direction of the lens barrel; the lens barrel is provided with a first bearing surface, at least one part of the object side surface of the space ring is in bearing contact with the first bearing surface, the lens positioned on the object side of the space ring is provided with a second bearing surface, at least another part of the object side surface of the space ring is in bearing contact with the second bearing surface, the lens positioned on the image side of the space ring is provided with a third bearing surface, the image side surface of the space ring is in bearing contact with the third bearing surface, and the projection of the third bearing surface to the first bearing surface is at least partially overlapped.

Further, the bearing area c1 between the space ring and the first bearing surface and the bearing area c2 between the space ring and the third bearing surface satisfy the following conditions: c1/c2 is more than or equal to 0.5 and less than or equal to 0.8.

Further, the projection of the third bearing surface to the second bearing surface is not coincident with the second bearing surface.

Further, the projection of the geometric center of the third bearing surface to the first bearing surface is positioned in the first bearing surface.

Further, the second bearing surface is provided with a light absorbing layer, and the 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.

Further, the lens on the object side of the spacer includes an optical mechanism area and an optical effective area along a direction close to the optical axis, the optical mechanism area has a second bearing surface, 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.

Furthermore, the surface of the optical mechanism area, which is located on the same side as the second bearing surface, has a groove structure, the groove structure is located on one side of the second bearing surface, which is close to the optical axis, and 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.

Further, the object side surface of the space ring comprises a first abutting surface, a connecting surface and a second abutting surface which are sequentially connected in the direction close to the optical axis, the first abutting surface abuts against and is abutted against the first abutting surface, at least part of the second abutting surface abuts against and is abutted against the second abutting surface, and the first abutting surface is close to the image side surface of the space ring relative to the second abutting surface.

Further, the inner cylinder wall of the lens barrel further comprises: one end of the slope surface is connected with the first bearing surface, and the slope surface is close to the optical axis relative to the first bearing surface; the inner bottom surface is connected with the other end of the slope surface, the inner bottom surface is close to the object side of the optical imaging lens relative to the first bearing surface, the inner bottom surface is close to the optical axis relative to the slope surface, the connecting surface and the slope surface are arranged at intervals, and the second bearing surface and the inner bottom surface are arranged at intervals.

Further, the minimum distance X1 between the connecting surface and the sloping surface is more than or equal to 0.01 mm and less than or equal to 0.05 mm; and/or the included angle theta 1 between the slope surface and the optical axis is more than or equal to 15 degrees and less than or equal to 35 degrees; and/or an included angle theta 2 between the connecting surface and the optical axis is greater than or equal to 15 degrees and less than or equal to 35 degrees.

Further, the plurality of lenses are divided into a first lens group and a second lens group, the first lens group is close to the object side of the optical imaging lens relative to the second lens group, and the space ring is located in the second lens group.

Further, the optical imaging lens further comprises a light shielding paper, and the light shielding paper is arranged between two adjacent lenses in the first lens group.

Furthermore, the image side surface of the light shielding paper is provided with an ink layer, and the thickness d3 of the ink layer is more 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 0.04 mm or more and 0.5 mm or less.

Further, a lens located on the image side of the light-shielding paper within the first lens group includes: an object side connecting surface which is abutted with the shading paper; the paraxial axis connecting surface is connected with the object side connecting surface and is close to the optical axis relative to the object side connecting surface; one end of the inclined plane is connected with the object side connecting surface; the first supporting surface is far away from the optical axis relative to the object side connecting surface, the first supporting surface is far away from the shading 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; the outer edge bearing surface is connected with the first supporting surface and is arranged at an angle with the first supporting surface.

Further, the inner cylinder wall of the lens barrel further comprises: the lapping inclined plane is abutted against the inclined plane; one end of the second supporting surface is connected with the lapping inclined surface, the lapping inclined surface is close to the object side end of the lens barrel relative to the second supporting surface, the lapping inclined surface is close to the optical axis relative to the second supporting surface, the second supporting surface is vertical to the optical axis, and the second supporting surface is abutted against the first supporting surface so as to support the lens positioned on the image side of the shading paper; and the inner end surface is connected with the other end of the second support surface, is perpendicular to the second support surface and extends towards the direction far away from the lap joint inclined plane.

Further, an included angle θ 4 between the lapping inclined plane and the optical axis is not less than 15 ° and not more than 35 °.

Further, a contact area c3 between the first supporting surface and the second supporting surface is 0.05 mm square or more and 0.5 mm square or less.

By applying the technical scheme of the utility model, the optical imaging lens comprises a lens cone, a plurality of lenses and at least one space ring, wherein the plurality of lenses are arranged at intervals along the axial direction of the lens cone; the space ring is arranged between two adjacent lenses, the lens barrel is provided with a first bearing surface, at least one part of the object side surface of the space ring is in bearing contact with the first bearing surface, the lens positioned at the object side of the space ring is provided with a second bearing surface, at least the other part of the object side surface of the space ring is in bearing contact with the second bearing surface, the lens positioned at the image side of the space ring is provided with a third bearing surface, the image side surface of the space ring is in bearing contact with the third bearing surface, and the projection of the third bearing surface to the first bearing surface is at least partially overlapped.

The space ring is arranged between the two adjacent lenses, so that the space ring can absorb more stray light, the reflection of light rays on an optical mechanism area of the lenses is reduced, the generation of stray light is reduced, and the imaging quality of the optical imaging lens is ensured. Meanwhile, the space ring also plays a role in bearing and supporting adjacent lenses, and the assembly stability of the lenses in the lens barrel is ensured. The lens cone is provided with a first bearing surface, at least one part of the object side surface of the space ring is in bearing contact with the first bearing surface, and the arrangement enables the space ring to be directly acted on the lens cone by the pressure of the lens in the assembling process of the optical imaging lens, so that the deformation of the space ring caused by the compression is avoided, and the structural strength of the space ring is ensured. Meanwhile, the first bearing surface of the lens cone plays a role in bearing and supporting the space ring, the risk that the space ring in the optical imaging lens with a large section difference is pressed and inclined is avoided, the assembling strength of the lens cone and the space ring is enhanced, the assembling yield of the lens cone and the space ring is improved, and the imaging quality of the optical imaging lens is further ensured. The lens positioned on the object side of the space ring is provided with a second bearing surface, at least another part of the object side surface of the space ring is in bearing contact with the second bearing surface, the lens positioned on the image side of the space ring is provided with a third bearing surface, and the image side surface of the space ring is in bearing contact with the third bearing surface, so that the assembly stability of the lens in the lens barrel is ensured. The third bearing surface is at least partially overlapped with the projection of the first bearing surface, so that the pressure of the lens on the space ring is partially corresponding to the pressure of the lens barrel on the space ring to form support, the stress points of the object side surface and the image side surface of the space ring are ensured to be at opposite positions, the stress on the object side surface and the image side surface of the space ring can be offset, the risk that the stress on the space ring is unbalanced and the space ring is inclined is avoided, the assembly strength of the space ring in the lens barrel is improved, and the imaging quality of the optical imaging lens is ensured.

In addition, the object side surface of the space ring is simultaneously abutted against the lens barrel and the lens, and the projection of the third bearing surface to the first bearing surface is at least partially overlapped, so that the problem of unstable assembly of the large-section-difference optical imaging lens is greatly solved, the assembly stability is improved, the outer diameter of the lens positioned at the object side of the space ring can be effectively reduced, the lens forming difficulty is reduced, and the forming quality of the lens is ensured.

Drawings

The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 shows a schematic structural diagram of an optical imaging lens according to an alternative embodiment of the present invention;

FIG. 2 shows an enlarged view at A in FIG. 1;

FIG. 3 is a view showing a positional relationship among the spacer, the lens and the lens barrel of FIG. 1;

fig. 4 is a schematic structural diagram of an optical imaging lens according to another assembly relationship of the present invention;

FIG. 5 shows an enlarged view at B in FIG. 4;

fig. 6 is a view showing a positional relationship among the light-shielding paper, the lens and the lens barrel in fig. 5;

FIG. 7 shows an enlarged view at C in FIG. 6;

fig. 8 shows a light stray light route diagram of the optical imaging lens of the present invention.

Wherein the figures include the following reference numerals:

10. a lens barrel; 11. a first bearing surface; 12. a slope surface; 13. an inner bottom surface; 14. lapping the inclined planes; 15. a second support surface; 16. an inner end surface; 20. a lens; 21. a second bearing surface; 211. a light absorbing layer; 22. a third bearing surface; 23. an object side connection surface; 24. a near optical axis connection surface; 25. a bevel; 26. a first support surface; 27. an outer edge bearing surface; 30. a space ring; 31. a first abutting surface; 32. a connecting surface; 33. a second abutting surface; 40. a masking paper; 41. an ink layer; 50. a first lens group; 60. a second lens group.

Detailed Description

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

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

In the present application, where the contrary is not intended, the use of directional words such as "upper, lower, top and bottom" is generally with respect to the orientation shown in the drawings, or with respect to the component itself in the vertical, perpendicular or gravitational direction; likewise, for ease of understanding and description, "inner and outer" refer to the inner and outer relative to the profile of the components themselves, but the above directional words are not intended to limit the invention.

In order to solve the problem that there is the assemblage poor stability in the big poor optical imaging camera lens of section among the prior art, the utility model provides an optical imaging camera lens.

As shown in fig. 1 to 8, 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 being disposed at intervals in an 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 part of an object-side surface of the spacer 30 bears 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 part of the object-side surface of the spacer 30 bears against the second bearing surface 21, the lens 20 located on the image side of the spacer 30 has a third bearing surface 22, an image-side surface of the spacer 30 bears against the third bearing surface 22, and a projection of the third bearing surface 22 onto the first bearing surface 11 at least partially overlaps.

By arranging the space ring 30 between two adjacent lenses 20, the space ring 30 can absorb more stray light, reduce the reflection of light on the optical mechanism area of the lenses 20, reduce the generation of stray light, and ensure the imaging quality of the optical imaging lens. Meanwhile, the space ring 30 also plays a role in bearing and supporting the adjacent lens 20, thereby ensuring the assembly stability of the lens 20 in the lens barrel 10. The lens barrel 10 is provided with a first bearing surface 11, and at least one part of the object side surface of the space ring 30 is in bearing contact with the first bearing surface 11, so that the space ring 30 is directly acted on the lens barrel 10 by the pressure of the lens 20 in the assembling process of the optical imaging lens, the deformation of the space ring 30 due to compression is avoided, and the structural strength of the space ring 30 is ensured. Meanwhile, the first bearing surface 11 of the lens barrel 10 plays a role in bearing and supporting the space ring 30, so that the risk that the space ring 30 in the optical imaging lens with a large section difference is pressed to incline is avoided, the assembling strength of the lens barrel 10 and the space ring 30 is enhanced, the assembling yield of the lens barrel 10 and the space ring 30 is improved, and the imaging quality of the optical imaging lens is further ensured. The lens 20 on the object side of the spacer 30 has the second bearing surface 21, at least another part of the object side surface of the spacer 30 bears against the second bearing surface 21, the lens 20 on the image side of the spacer 30 has the third bearing surface 22, and the image side surface of the spacer 30 bears against the third bearing surface 22, so that the lens 20 can be assembled in the lens barrel 10 stably. The projection of the third bearing surface 22 to the first bearing surface 11 is at least partially overlapped, so that the pressure of the lens 20 on the space ring 30 corresponds to the pressure of the lens barrel 10 on the space ring 30 to form a support, the stress points of the object side surface and the image side surface of the space ring 30 are ensured to be at opposite positions, the stress on the object side surface of the space ring 30 and the stress on the image side surface of the space ring 30 can be offset, the risk that the space ring 30 is unbalanced in stress and inclined is avoided, the assembly strength of the space ring 30 in the lens barrel 10 is improved, and the imaging quality of the optical imaging lens is ensured.

In addition, the object side surface of the spacer 30 abuts against the lens barrel 10 and the lens 20 at the same time, and the projection of the third bearing surface 22 to the first bearing surface 11 is at least partially overlapped, so that the problem of unstable assembly of the large-step-difference optical imaging lens is greatly solved, the assembly stability is improved, the outer diameter of the lens 20 positioned at the object side of the spacer 30 can be effectively reduced, the molding difficulty of the lens 20 is reduced, and the molding quality of the lens 20 is ensured.

It should be noted that, the lens 20 and the lens barrel 10 are fixed by laser welding, which is helpful to improve the reliability, and at the same time, the assembling strength between the lens 20 and the lens barrel 10 is further enhanced, and the imaging quality of the optical imaging lens is improved.

The lens 20 is a plastic lens, and the lens barrel 10 is a plastic barrel.

As shown in fig. 1 and 2, the bearing area c1 between the spacer 30 and the first bearing surface 11 and the bearing area c2 between the spacer 30 and the third bearing surface 22 satisfy: c1/c2 is more than or equal to 0.5 and less than or equal to 0.8. The arrangement ensures that stress points of the object side surface of the space ring 30 and the image side surface of the space ring 30 are in opposite positions, avoids the risk that the space ring 30 is inclined due to unbalanced stress, improves the assembling strength of the space ring 30 in the lens barrel 10, and ensures the imaging quality of the optical imaging lens.

Specifically, the projection of the third bearing surface 22 to the second bearing surface 21 does not coincide with the second bearing surface 21. The arrangement avoids that the third bearing surface 22 has too large area, which results in that the space ring 30 is relatively thick and heavy, which is not beneficial to the lightness and thinness of the space ring 30, and simultaneously, the space ring 30 can shield the imaging light and influence the integrity of imaging.

In the present embodiment, the projection of the geometric center of the third bearing surface 22 to the first bearing surface 11 is located in the first bearing surface 11. In general, the stress point of the third bearing surface 22 pressed by 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 to the first bearing surface 11 is located in the first bearing surface 11, so that the first bearing surface 11 can counteract the force at the geometric center of the third bearing surface 22, thereby effectively avoiding the displacement and deformation of the spacer.

Specifically, the second bearing surface 21 has a light absorbing layer 211, and a thickness d1 of the light absorbing layer 211 is 0.02 mm or more and 0.03 mm or less. The second bearing surface 21 is provided with the light absorption layer 211, so that the light absorption layer 211 can effectively fill the gap between the spacer 30 and the lens 20, the spacer 30 is adhered to the lens 20, the connection strength between the spacer 30 and the lens 20 is ensured, and the reliability is improved. Meanwhile, the light absorption layer 211 can further absorb stray light, so that the reflection of light rays on the optical mechanism area of the lens 20 is reduced, the generation of stray light is reduced, and the imaging quality of the optical imaging lens is improved. If the thickness d1 of the light absorbing layer 211 is less than 0.02 mm, so that the thickness of the light absorbing layer 211 is too small, a gap is easily formed between the spacer 30 and the lens 20, which may cause a risk that the spacer 30 is separated from the lens 20, thereby affecting the assembling stability of the spacer 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 tends to cause the spacer 30 to be not fitted to the lens 20. Limiting the thickness d1 of the light absorbing layer 211 to a range of 0.02 mm to 0.03 mm facilitates a stable assembly of the spacer 30 with the lens 20.

The light absorbing layer 211 is an ink-applied layer.

Specifically, the lens 20 on the object side of the spacer 30 includes an optical mechanism region and an optical effective region in the direction close to the optical axis, the optical mechanism region has a second bearing surface 21, the surface of the optical mechanism region 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. Limiting roughness Ra of rough surface in 0.1 to 0.5 within range, strengthened the frictional force on the surface in optical mechanism district, the adhesion of light-absorbing layer 211 of being convenient for has avoided the risk that light-absorbing layer 211 drops, can increase the joint strength of space ring 30 and lens 20 simultaneously, guaranteed space ring 30 and lens 20's be connected closely nature, make light-absorbing layer 211 can the steady job simultaneously, in order to reduce stray light's production, guarantee optical imaging lens's formation of image stability.

As shown in fig. 2, a surface of the optical mechanism area on the same side as the second bearing surface 21 has a groove structure, the groove structure is located on a side of the second bearing surface 21 away from the optical axis, and 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. The surface of the optical mechanism region on the same side as the second bearing surface 21 has a groove structure, so that the light absorbing layer 211 can be prevented from overflowing to the optical effective region of the lens 20, thereby influencing the transmission of light in the optical effective region. If the depth e1 of the groove structure is less than 0.01 mm, the light absorbing layer 211 easily overflows to the optically effective area of the lens 20. If the depth e1 of the groove structure is greater than 0.15 mm, the depth of the groove structure is too large to facilitate the assembly of the lens 20. Limiting the depth e1 of the groove structure to a range of 0.01 mm to 0.15 mm ensures that the lens 20 is easily assembled while reducing the light absorbing layer 211 from spilling over the optically active area of the lens 20.

As shown in fig. 3, the spacer 30 includes a first contact surface 31, a connecting surface 32, and a second contact surface 33, which are connected in order, in a direction in which the object side surface is closer to the optical axis, the first contact surface 31 is in contact with and supported by the first support surface 11, at least a portion of the second contact surface 33 is in contact with and supported by the second support surface 21, and the first contact surface 31 is closer to the image side surface of the spacer 30 than the second contact surface 33. The first abutting surface 31 abuts against the first abutting surface 11, so that the lens barrel 10 plays a role in supporting and supporting the space ring 30, the space ring 30 can be effectively prevented from being deformed, and the structural strength of the space ring 30 is ensured. By abutting and bearing at least part of the second abutting surface 33 with the second abutting surface 21, the lens 20 plays a role of bearing the space ring 30, and the lens 20 can be stably assembled in the lens barrel 10. The first contact surface 31 is located closer to the image side surface of the spacer 30 than the second contact surface 33, which is advantageous for enhancing the lightness of the spacer 30 and reducing the possibility of deformation of the spacer 30. In addition, the object side surface of the spacer 30 is respectively abutted against the lens barrel 10 and the lens 20, so that the spacer 30 is prevented from being inclined due to uneven stress, the risk of inclination of the lens 20 is further avoided, the assembly strength of the spacer 30 and the lens 20 in the lens barrel 10 is greatly improved, the reliability is improved, the outer diameter of the lens 20 on the object side of the spacer 30 can be effectively reduced, the difficulty in molding the lens 20 is reduced, and the molding quality of the lens 20 is ensured.

Specifically, the inner cylinder wall of the lens barrel 10 further includes a slope 12 and an inner bottom surface 13, one end of the slope 12 is connected to the first bearing surface 11, and the slope 12 is close to the optical axis relative to the first bearing surface 11; the inner bottom surface 13 is connected to 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, the inner bottom surface 13 is close to the optical axis relative to the slope surface 12, the connecting surface 32 is arranged at an interval with the slope surface 12, and the second abutting surface 33 is arranged at an interval with the inner bottom surface 13. The inner bottom surface 13 and the second abutting surface 33 are spaced apart from each other, so that a certain deformation space is provided for the space ring 30, and the space ring 30 and the lens 20 can be conveniently assembled in the lens barrel 10. Meanwhile, the bearing strength of the space ring 30 on the lens 20 positioned at the object side of the space ring 30 is not affected, the bearing force of the space ring 30 on the lens 20 is ensured, the situation that the lens 20 and the space ring 30 are dislocated or inclined is further avoided, and the working stability of the space ring 30 and the lens 20 is ensured.

As shown in fig. 2, the minimum distance X1 between the connection 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. The minimum distance X1 between connecting face 32 and domatic 12 limits at 0.01 millimeter to 0.05 millimeter within range, can effectively eliminate the unstable phenomenon of assemblage that the slight deformation of space ring 30 brought, and then guarantee that lens 20 is poor stable between the time quantum, guarantee the imaging quality. The connecting surface 32 and the sloping surface 12 are spaced apart from each other, so that the spacer 30 has a certain deformation space, which facilitates the assembly of the spacer 30 and the lens 20 into the lens barrel 10.

Specifically, an included angle θ 1 between the slope surface 12 and the optical axis is greater than or equal to 15 ° and less than or equal to 35 °. The included angle theta 1 between the slope surface 12 and the optical axis is limited within the range of 15 degrees to 35 degrees, so that the phenomenon of unstable assembly caused by slight deformation of the space ring 30 can be effectively eliminated, the bearing stability of the lens 20 is further ensured, meanwhile, the absorption of the lens barrel 10 on stray light can be ensured, and the imaging quality is ensured.

Preferably, the angle θ 1 between the slope 12 and the optical axis is 20 °.

Specifically, an angle θ 2 between the connection surface 32 and the optical axis is 15 ° or more and 35 ° or less. The included angle theta 2 between the connecting surface 32 and the optical axis is limited within the range of 15 degrees to 35 degrees, so that the possibility of deformation of the space ring 30 is reduced, the structural strength of the space ring 30 can be ensured, stray light is absorbed as much as possible, the generation of the stray light is reduced, and the imaging quality of the optical imaging lens is improved.

Preferably, the angle θ 2 between the connecting surface 32 and the optical axis is 20 °.

The sloping surface 12 is parallel to the connecting surface 32.

As shown in fig. 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 with respect to the second lens group 60, and the spacer 30 is located within the second lens group 60. The space ring 30 is located in the second lens group 60, the optical imaging lens has a large step in the second lens group 60, the large step is located at random in the second lens group 60, the space ring 30 can be assembled according to the large step, the structure of the lens barrel 10 needs to be adjusted along with the large step, and the degree of freedom in designing the optical imaging lens is large.

Specifically, the optical imaging lens further includes a light shielding paper 40, and the light shielding paper 40 is disposed between two adjacent lenses 20 in the first lens group 50. By arranging the masking paper 40 between two adjacent lenses 20 in the first lens group 50, the masking paper 40 plays a role of bearing and supporting the two adjacent lenses 20, and the assembling stability of the lenses 20 in the lens barrel 10 is ensured. Meanwhile, the arrangement of the shading paper 40 can shade stray light, reduce the reflection of light on the optical mechanism area of the lens 20, reduce the generation of stray light and ensure the imaging quality of the optical imaging lens.

As shown in fig. 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 0.002 mm or more and 0.05 mm or less. The ink layer 41 is arranged on the image side surface of the light-shielding paper 40, so that the ink layer 41 can effectively fill the gap between the light-shielding paper 40 and the lens 20, the light-shielding paper 40 is adhered to the lens 20, the connection strength between the light-shielding paper 40 and the lens 20 is ensured, and the reliability is improved. Meanwhile, the arrangement of the ink layer 41 can further absorb stray light, reduce the reflection of light rays on the optical mechanism area of the lens 20, reduce the generation of stray light and increase 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 may easily cause a gap between the light-shielding paper 40 and the lens 20, resulting in a risk of the light-shielding paper 40 being separated from the lens 20, thereby affecting the assembling 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 may cause the light-shielding paper 40 to be not fit with the lens 20. Limiting the thickness d3 of the ink layer 41 to a range of 0.002 mm to 0.05 mm facilitates stable assembly of the masking sheet 40 with the lens 20.

Specifically, the width W1 of the ink layer 41 is 0.04 mm or more and 0.5 mm or less. 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, which affects 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, which tends to cause the ink layer 41 to overflow the optically effective area of the lens 20, thereby affecting the transmission of light in the optically effective area and the integrity of the image. Limiting the width W1 of the ink layer 41 to be in the range of 0.04 mm to 0.5 mm can ensure the connection strength between the masking paper 40 and the lens 20 and prevent the ink layer 41 from overflowing to the optically effective area of the lens 20.

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

As shown in fig. 6 and 7, the lens 20 positioned on the image side of the light-shielding paper 40 in the first lens group 50 includes an object-side connecting surface 23, a paraxial connecting surface 24, a first supporting surface 26, an inclined surface 25 and an outer edge bearing surface 27, wherein the object-side connecting surface 23 is abutted against the light-shielding paper 40; the paraxial axis connecting surface 24 is connected to the object-side connecting surface 23, and the paraxial axis connecting surface 24 is close to the optical axis relative to the object-side connecting surface 23; one end of the inclined surface 25 is connected to the object-side connection surface 23; the first supporting surface 26 is far from the optical axis relative to the object-side connecting surface 23, the first supporting surface 26 is far 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; the outer edge bearing surface 27 is connected with the first supporting surface 26, and the outer edge bearing surface 27 and the first supporting surface 26 are arranged at an angle.

By abutting the object-side connecting surface 23 with the shading paper 40, the shading paper 40 plays a role in carrying and protecting the lens 20, and meanwhile, light transmitted in an optical mechanism area of the lens 20 can be effectively shielded, so that the generation of stray light is reduced, and the imaging quality of the optical imaging lens is improved. The paraxial axis connecting surface 24 is connected to the object-side connecting surface 23, and the paraxial axis connecting surface 24 is close to the optical axis relative to the object-side connecting surface 23, which is favorable for reducing the thickness of the optical mechanism region of the lens 20, so that the lens 20 is easier to assemble, and the assembly difficulty is effectively reduced. One end of the inclined surface 25 is connected to the object-side connection surface 23; the first supporting surface 26 is far away from the optical axis relative to the object-side connecting surface 23, the first supporting surface 26 is far away from the masking 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, so that the assembling performance of the lens 20 and the masking paper 40 is ensured, the assembling difficulty of the lens 20 and the masking paper 40 in the lens barrel 10 can be reduced, and the assembling stability of the optical imaging lens is ensured. The outer edge bearing surface 27 and the first supporting surface 26 are arranged at an angle, so that the assembling strength of the lens 20 is greatly improved, the lens 20 is further prevented from shaking in the lens barrel 10, and the imaging quality of the optical imaging lens is ensured.

Specifically, the inner cylinder wall of the lens barrel 10 further includes an overlapping inclined surface 14, a second supporting surface 15 and an inner end surface 16, and the overlapping inclined surface 14 and the inclined surface 25 are arranged at intervals; one end of the second supporting surface 15 is connected to the overlapping inclined surface 14, the overlapping inclined surface 14 is close to the object-side end of the lens barrel 10 relative to the second supporting surface 15, the overlapping 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 abuts against the first supporting surface 26, and the lens 20 located on the image side of the light-shielding paper 40 is supported; the inner end surface 16 is connected to the other end of 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 slope 14.

The overlap slope 14 and the slope 25 are in parallel.

Specifically, the included angle θ 4 between the overlap inclined surface 14 and the optical axis is equal to or greater than 15 ° and equal to or less than 35 °. The included angle theta 4 between the lapping inclined plane 14 and the optical axis is limited within the range of 15 degrees to 35 degrees, so that the phenomenon of unstable assembly caused by slight deformation of the masking paper 40 can be effectively eliminated, the bearing stability of the lens 20 is further ensured, and the imaging quality is ensured. Preferably, the angle θ 4 between the overlap ramp 14 and the optical axis is 20 °.

An angle θ 3 between the inclined surface 25 and the optical axis is equal to or greater than 15 ° and equal to or less than 35 °. Preferably, the angle θ 3 between the inclined surface 25 and the optical axis is 20 °. The minimum distance X3 between the overlap slope 14 and the slope 25 is 0.01 mm or more and 0.15 mm or less.

Optionally, the contact area c3 between the first supporting surface 26 and the second supporting surface 15 is greater than or equal to 0.05 square millimeter and less than or equal to 0.5 square millimeter. If the contact area c3 between the first supporting surface 26 and the second supporting surface 15 is less than 0.05 square millimeter, the contact area between the first supporting surface 26 and the second supporting surface 15 is too small to be beneficial to the stability of the bearing. If the contact area c3 between the first supporting surface 26 and the second supporting surface 15 is greater than 0.5 square millimeter, the contact area between the first supporting surface 26 and the second supporting surface 15 is too large, which increases the assembling strength between the lens 20 and the lens barrel 10, but also increases the difficulty in mounting and dismounting the lens 20 and the lens barrel 10, so that the lens 20 is not easy to dismount, and is not beneficial to thinning the lens barrel 10. Limiting the contact area c3 between the first supporting surface 26 and the second supporting surface 15 to the range of 0.05 mm to 0.5 mm facilitates the stable assembly of the lens 20 while ensuring the lightness and thinness of the lens barrel 10.

Preferably, the contact area c3 between the first support surface 26 and the second support surface 15 is 0.04 square millimeters.

It is obvious that the above described embodiments are only some of the embodiments of the present invention, and not all of them. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.

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

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

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

Claims (10)

1. An optical imaging lens, comprising:

a lens barrel (10);

a plurality of lenses (20), the plurality of lenses (20) being arranged at intervals in an axial direction of the lens barrel (10);

the lens barrel (10) is provided with a first bearing surface (11), at least one part of the object side surface of the spacer (30) is in bearing contact with the first bearing surface (11), the lens (20) positioned on the object side of the spacer (30) is provided with a second bearing surface (21), at least another part of the object side surface of the spacer (30) is in bearing contact with the second bearing surface (21), the lens (20) positioned on the spacer (30) is provided with a third bearing surface (22), the image side surface of the spacer (30) is in bearing contact with the third bearing surface (22), and the projection of the third bearing surface (22) to the image side of the first bearing surface (11) is at least partially overlapped.

2. The optical imaging lens according to claim 1,

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: c1/c2 is more than or equal to 0.5 and less than or equal to 0.8; and/or

The projection of the third bearing surface (22) to the second bearing surface (21) is not coincident with the second bearing surface (21); and/or

The projection of the geometric center of the third bearing surface (22) to the first bearing surface (11) is positioned in the first bearing surface (11); and/or

The second bearing surface (21) is provided with a light absorption layer (211), and the thickness d1 of the light absorption layer (211) is 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, characterized in that the lens (20) on the object side of the spacer (30) includes an optical mechanism region having the second bearing surface (21) and an optically effective region in a direction close to the optical axis, and the surface of the optical mechanism region is a rough surface having a roughness Ra of 0.1 or more and 0.5 or less.

4. The optical imaging lens according to claim 3, characterized in that the surface of the optical mechanism region on the same side as the second bearing surface (21) has a groove structure on the side of the second bearing surface (21) close to the optical axis, and 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. Optical imaging lens according to claim 1, characterized in that the spacer (30) has an object-side surface facing in a direction closer to the optical axis comprising a first abutment surface (31), a connecting surface (32) and a second abutment surface (33) connected in sequence, the first abutment surface (31) bearing in abutment against the first bearing surface (11), at least part of the second abutment surface (33) bearing in abutment against the second bearing surface (21), the first abutment surface (31) being closer to the image-side surface of the spacer (30) than the second abutment surface (33).

6. The optical imaging lens according to claim 5, characterized in that the inner barrel wall of the lens barrel (10) further comprises:

the slope surface (12), one end of the slope surface (12) is connected with the first bearing surface (11), and the slope surface (12) is close to the optical axis relative to the first bearing surface (11);

interior bottom surface (13), interior bottom surface (13) with the other end on domatic (12) is connected, interior bottom surface (13) for first bearing is close to optical imaging lens's thing side, just interior bottom surface (13) for domatic (12) are close to the optical axis, connect face (32) with domatic (12) interval sets up, second butt face (33) with interior bottom surface (13) interval sets up.

7. Optical imaging lens according to any one of claims 1 to 6, characterized in that the plurality of lenses (20) is divided into a first lens group (50) and a second lens group (60), the first lens group (50) being close to the object side of the optical imaging lens with respect to the second lens group (60), the spacer (30) being located within the second lens group (60).

8. The optical imaging lens according to claim 7, further comprising a light-shielding paper (40), wherein the light-shielding paper (40) is disposed between adjacent two of the lenses (20) within the first lens group (50).

9. The optical imaging lens according to claim 8, wherein the lens (20) located on the image side of the light-shielding paper (40) within the first lens group (50) includes:

an object-side connection surface (23), wherein the object-side connection surface (23) abuts against the light-shielding paper (40);

a paraxial axis connection surface (24), said paraxial axis connection surface (24) being connected to said object-side connection surface (23) and said paraxial axis connection surface (24) being closer to said optical axis than said object-side connection surface (23);

an inclined surface (25), one end of the inclined surface (25) being connected to the object-side connection surface (23);

a first supporting surface (26), the first supporting surface (26) being away from the optical axis relative to the object-side connecting surface (23), the first supporting surface (26) being away from the light-shielding paper (40) relative to the object-side connecting surface (23), the other end of the inclined surface (25) being connected to the first supporting surface (26), and the first supporting surface (26) being parallel to the object-side connecting surface (23);

the outer edge bearing surface (27), the outer edge bearing surface (27) with first holding surface (26) are connected, just outer edge bearing surface (27) with first holding surface (26) are the angle setting.

10. The optical imaging lens according to claim 9, characterized in that the inner barrel wall of the lens barrel (10) further comprises:

the lapping inclined plane (14), the lapping inclined plane (14) and the inclined plane (25) are arranged at intervals;

a second supporting surface (15), one end of the second supporting surface (15) is connected to the overlapping inclined surface (14), the overlapping inclined surface (14) is close to the object side end of the lens barrel (10) relative to the second supporting surface (15), the overlapping 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, and the second supporting surface (15) abuts against the first supporting surface (26) to support the lens (20) on the image side of the light-shielding paper (40);

the inner end face (16) is connected with the other end of the second supporting face (15), the inner end face (16) is perpendicular to the second supporting face (15), and the inner end face (16) extends in the direction far away from the lap joint inclined face (14).

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