Photographic lens

Abstract

The present application provides a photographic lens, which comprises, in sequence from the light-in side to the light-out side: a first lens, the surface of which towards the light-in side is a convex surface, and the surface of which towards the light-out side is a concave surface; a second lens and a third lens, between which at least one spacer is arranged, the surface of which towards the light-in side is a concave surface, and the surface of which towards the light-out side is a convex surface; a fourth lens and a fifth lens, between which at least one spacer is arranged, the surface of which towards the light-out side is a concave surface; and at least one spacer arranged between the fourth lens and the fifth lens, wherein the outer diameter D4s of the surface of the fourth spacer towards the light-in side, the inner diameter d4s of the surface of the fourth spacer towards the light-in side, the interval EP23 between the second spacer and the third spacer, and half of the maximum field angle Semi-FOV of the photographic lens satisfy the following relationship: 1.5<(D4s-d4s) / EP23*TAN(Semi-FOV)<8.5. The present application solves the problem of instability in the prior art front photographic lens.

Description

TECHNICAL FIELD

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

[0002] With the rapid development of electronic products, electronic products have gradually become a necessary variety of daily life. With the popularity of full-screen mobile phones, tablets and notebook computers, the market has increasingly high requirements for the photographic lens mounted on electronic products. Not only does the imaging quality need to be high, but the size of the imaging lens also needs to be reduced to reduce the screen-to-body ratio. In addition, the photographic range needs to be expanded, and the problems of unstable assembly and stray light in assembly and yield detection (including stray light detection) need to be solved to avoid the influence of stray light and assembly stability.

[0003] That is, the prior art front-facing photographic lens has the problems of large screen-to-body ratio, small photographic range (small field of view), stray light and unstable assembly. SUMMARY

[0004] The main purpose of the present application is to provide a photographic lens to solve the problem of unstable assembly of the prior art front-facing photographic lens.

[0005] In order to achieve the above-mentioned purpose, according to one aspect of the present application, a photographic lens is provided, which comprises, in order from the light-in side to the light-out side: a first lens, the surface of the first lens facing the light-in side is a convex surface, and the surface of the first lens facing the light-out side is a concave surface; a second lens; at least one spacer is arranged between the first lens and the second lens, and the spacer in contact with the surface of the first lens facing the light-out side is a first spacer; a third lens; at least one spacer is arranged between the second lens and the third lens, and the spacer in contact with the surface of the second lens facing the light-out side is a second spacer; a fourth lens, the surface of the fourth lens facing the light-in side is a concave surface, and the surface of the fourth lens facing the light-out side is a convex surface; at least one spacer is arranged between the third lens and the fourth lens, and the spacer in contact with the surface of the third lens facing the light-out side is a third spacer; a fifth lens, the surface of the fifth lens facing the light-out side is a concave surface; at least one spacer is arranged between the fourth lens and the fifth lens, and the spacer in contact with the surface of the fourth lens facing the light-out side is a fourth spacer, wherein the outer diameter D4s of the surface of the fourth spacer facing the light-in side, the inner diameter d4s of the surface of the fourth spacer facing the light-in side, the interval EP23 between the second spacer and the third spacer, and half of the maximum field of view angle Semi-FOV of the photographic lens satisfy: 1.5 < (D4s-d4s) / EP23 TAN(Semi-FOV) < 8.5.

[0006] Further, the photographing lens further comprises a lens barrel, and the first lens to the fifth lens and the spacers therebetween are located in the lens barrel.

[0007] Further, an inner diameter d0m of a surface of the lens barrel facing the light-outgoing side, an outer diameter D0m of the surface of the lens barrel facing the light-outgoing side, and an axial distance TD from the surface of the first lens facing the light-ingoing side to the surface of the last lens facing the light-outgoing side satisfy: (D0m-d0m) / TD>0.

[0008] Further, a radius of curvature R3 of the surface of the second lens facing the light-ingoing side, the axial distance TD from the surface of the first lens facing the light-ingoing side to the surface of the last lens facing the light-outgoing side, and a maximum height L of the lens barrel satisfy: R3 / TD+R3 / L<-19.0.

[0009] Further, an outer diameter D4s of the surface of the fourth spacer facing the light-ingoing side, an inner diameter d4s of the surface of the fourth spacer facing the light-ingoing side, and a radius of curvature R8 of the surface of the fourth lens facing the light-outgoing side satisfy: (D4s-d4s) / R8<-1.0.

[0010] Further, an outer diameter D4m of the surface of the fourth spacer facing the light-outgoing side, an outer diameter D1m of the surface of the first spacer facing the light-outgoing side, a maximum thickness CP1 of the first spacer, a central thickness CT2 of the second lens on the optical axis, a central thickness CT3 of the third lens on the optical axis, and a spacing EP34 between the third spacer and the fourth spacer satisfy: (D4m-D1m) / (CP1+CT2+CT3+EP34)>1.0.

[0011] Further, an inner diameter d3s of the surface of the third spacer facing the light-ingoing side, an inner diameter d1s of the surface of the first spacer facing the light-ingoing side, a spacing EP12 between the first spacer and the second spacer, a central thickness CT2 of the second lens on the optical axis of the photographing lens, a central thickness CT3 of the third lens on the optical axis, and an air spacing T23 between the second lens and the third lens on the optical axis satisfy: (d3s-d1s) / (EP12+CT2+T23+CT3)>0.

[0012] Further, a central thickness CT3 of the third lens on the optical axis of the photographing lens, a central thickness CT4 of the fourth lens on the optical axis, a maximum thickness CP3 of the third spacer, and a maximum thickness CP4 of the fourth spacer satisfy: CT3 / CP4+CT4 / CP3<75.

[0013] Further, a spacing EP23 between the second spacer and the third spacer, a central thickness CT2 of the second lens on the optical axis of the photographing lens, and an effective focal length f3 of the third lens satisfy: f3 / EP23+f3 / CT2>-320.

[0014] Further, a distance EP12 between the first spacer and the second spacer, a distance EP34 between the third spacer and the fourth spacer, and an air distance T12 between the first lens and the second lens on the optical axis of the photographic lens satisfy: (EP12+EP34) / T12<6.0.

[0015] Further, at least one spacer between the fourth lens and the fifth lens is a metal spacer.

[0016] According to another aspect of the present application, there is provided a photographic lens comprising, in order from an entrance side to an exit side: a first lens, a surface of the first lens facing the entrance side being a convex surface, and a surface of the first lens facing the exit side being a concave surface; a second lens; at least one spacer is provided between the first lens and the second lens, and a spacer in contact with the surface of the first lens facing the exit side is a first spacer; a third lens; at least one spacer is provided between the second lens and the third lens, and a spacer in contact with a surface of the second lens facing the exit side is a second spacer; a fourth lens, a surface of the fourth lens facing the entrance side being a concave surface, and a surface of the fourth lens facing the exit side being a convex surface; at least one spacer is provided between the third lens and the fourth lens, and a spacer in contact with a surface of the third lens facing the exit side is a third spacer; a fifth lens, a surface of the fifth lens facing the exit side being a concave surface; at least one spacer is provided between the fourth lens and the fifth lens, and a spacer in contact with a surface of the fourth lens facing the exit side is a fourth spacer; wherein a distance EP23 between the second spacer and the third spacer, a central thickness CT2 of the second lens on the optical axis of the photographic lens, and an effective focal length f3 of the third lens satisfy: f3 / EP23+f3 / CT2>-320.

[0017] Further, the photographic lens further comprises a lens barrel, and the first lens to the fifth lens and the lenses and spacers therebetween are located in the lens barrel.

[0018] Further, an inner diameter dOm of a surface of the lens barrel facing the exit side, an outer diameter D0m of the surface of the lens barrel facing the exit side, and an axial distance TD from the surface of the first lens facing the entrance side to the surface of the last lens facing the exit side satisfy: (D0m-d0m) / TD>0.

[0019] Further, a radius of curvature R3 of the surface of the second lens facing the entrance side, the axial distance TD from the surface of the first lens facing the entrance side to the surface of the last lens facing the exit side, and a maximum height L of the lens barrel satisfy: R3 / TD+R3 / L>-19.0.

[0020] Further, an outer diameter D4s of the fourth spacer toward the light-incoming side surface, an inner diameter d4s of the fourth spacer toward the light-incoming side surface, and a radius of curvature R8 of the fourth lens toward the light-outgoing side surface satisfy: (D4s-d4s) / R8<-1.0.

[0021] Further, an outer diameter D4m of the fourth spacer toward the light-outgoing side surface, an outer diameter D1m of the first spacer toward the light-outgoing side surface, a maximum thickness CP1 of the first spacer, a central thickness CT2 of the second lens on the optical axis, a central thickness CT3 of the third lens on the optical axis, and a distance EP34 between the third spacer and the fourth spacer satisfy: (D4m-D1m) / (CP1+CT2+CT3+EP34)>1.0.

[0022] Further, an inner diameter d3s of the third spacer toward the light-incoming side surface, an inner diameter d1s of the first spacer toward the light-incoming side surface, a distance EP12 between the first spacer and the second spacer, a central thickness CT2 of the second lens on the optical axis of the photographing lens, a central thickness CT3 of the third lens on the optical axis, and an air distance T23 between the second lens and the third lens on the optical axis satisfy: (d3s-d1s) / (EP12+CT2+T23+CT3)>0.

[0023] Further, a central thickness CT3 of the third lens on the optical axis of the photographing lens, a central thickness CT4 of the fourth lens on the optical axis, a maximum thickness CP3 of the third spacer, and a maximum thickness CP4 of the fourth spacer satisfy: CT3 / CP4+CT4 / CP3<75.

[0024] Further, a distance EP12 between the first spacer and the second spacer, a distance EP34 between the third spacer and the fourth spacer, and an air distance T12 between the first lens and the second lens on the optical axis of the photographing lens satisfy: (EP12+EP34) / T12<6.0.

[0025] Further, at least one spacer between the fourth lens and the fifth lens is a metal spacer.

[0026] The technical scheme of the present application is applied to a photographic lens, which comprises, in sequence from the light-in side to the light-out side, a first lens, a second lens, a third lens, a fourth lens and a fifth lens, the surface of the first lens facing the light-in side is a convex surface, and the surface of the first lens facing the light-out side is a concave surface; at least one spacer is arranged between the first lens and the second lens, and the spacer in contact with the surface of the first lens facing the light-out side is the first spacer; at least one spacer is arranged between the second lens and the third lens, and the spacer in contact with the surface of the second lens facing the light-out side is the second spacer; the surface of the fourth lens facing the light-in side is a concave surface, and the surface of the fourth lens facing the light-out side is a convex surface; at least one spacer is arranged between the third lens and the fourth lens, and the spacer in contact with the surface of the third lens facing the light-out side is the third spacer; the surface of the fifth lens facing the light-out side is a concave surface; at least one spacer is arranged between the fourth lens and the fifth lens, and the spacer in contact with the surface of the fourth lens facing the light-out side is the fourth spacer. The outer diameter D4s of the surface of the fourth spacer facing the light-in side, the inner diameter d4s of the surface of the fourth spacer facing the light-in side, the interval EP23 between the second spacer and the third spacer, and half of the maximum field angle Semi-FOV of the photographic lens satisfy the following relationship: 1.5 < (D4s-d4s) / EP23 TAN(Semi-FOV) < 8.5.

[0027] The arrangement of the at least one spacer between the adjacent two lenses can reduce the reflection of light between the adjacent two lenses, reduce the generation of stray light, and ensure the imaging quality of the photographic lens. Meanwhile, the arrangement of the at least one spacer between the adjacent two lenses can adjust the distance between the adjacent two lenses, and ensure the imaging quality of the photographic lens. In addition, the arrangement of the spacer can ensure the stable abutment of the lenses, ensure the stability of the lens assembly, and effectively increase the stability of the photographic lens assembly. The (D4s-d4s) / EP23 TAN(Semi-FOV) control is within a reasonable range, which can control the luminous flux of the fifth lens, and by controlling the size of the inner diameter of the fourth spacer, the external excess light can be blocked, and the stray light generated by the fifth lens is improved, and the imaging quality of the photographic lens is improved, so as to improve the yield of the lens. At the same time, by controlling the maximum field of view and the interval between the second spacer and the third spacer within a reasonable range, the assembly requirement between the second lens, the third lens and the fourth lens, the outer diameter of the light entering side of the fourth spacer and the inner diameter of the light entering side of the fourth spacer are reasonably controlled, which ensures the contact area with the light emitting side of the fourth lens, and limits the light entering the fifth lens, and further controls the size of the whole photographic lens rear end shape, so as to ensure the miniaturization of the photographic lens while ensuring the system field of view. BRIEF DESCRIPTION OF DRAWINGS

[0028] The drawings constituting a part of the specification of this application are used to provide further understanding of the present application, the illustrative embodiments of the present application and the description thereof are used to explain the present application, and do not constitute improper limitation on the present application. In the drawings:

[0029] Figure 1 The structure schematic diagram of the photographic lens of an optional embodiment of the present application is shown;

[0030] Figure 2 The structure schematic diagram of the photographic lens of example one of the present application in the first state is shown;

[0031] Figure 3 The structure schematic diagram of the photographic lens of example one of the present application in the second state is shown;

[0032] Figures 4 to 7 The on-axis chromatic aberration curve, the astigmatism curve, the distortion curve and the magnification chromatic aberration curve of example one of the present application are shown respectively.

[0033] Figure 8 The structure schematic diagram of the photographic lens of example two of the present application in the first state is shown;

[0034] Figure 9 The structure schematic diagram of the photographic lens of example two of the present application in the second state is shown;

[0035] Figures 10 to 13 The on-axis chromatic aberration curve, the astigmatism curve, the distortion curve and the magnification chromatic aberration curve of example two of the present application are shown respectively.

[0036] Figure 14 The structure schematic diagram of the photographic lens of example three of the present application in the first state is shown;

[0037] Figure 15 The structure schematic diagram of the photographic lens of example three of the present application in the second state is shown;

[0038] Figures 16 to 19 The on-axis chromatic aberration curve, the astigmatism curve, the distortion curve and the lateral chromatic aberration curve of Example Three of the present application are shown respectively.

[0039] Figure 20 The light path trend chart of the stray light of the photographic lens of an optional embodiment of the present application is shown.

[0040] In the above drawings, reference numerals include the following:

[0041] 10, lens barrel; E1, first lens; S1, light entrance side surface of the first lens; S2, light exit side surface of the first lens; P1, first spacer; P1b, sixth spacer; E2, second lens; S3, light entrance side surface of the second lens; S4, light exit side surface of the second lens; P2, second spacer; E3, third lens; S5, light entrance side surface of the third lens; S6, light exit side surface of the third lens; P3, third spacer; P3b, seventh spacer; E4, fourth lens; S7, light entrance side surface of the fourth lens; S8, light exit side surface of the fourth lens; P4, fourth spacer; P4b, fifth spacer; E5, fifth lens; S9, light entrance side surface of the fifth lens; S10, light exit side surface of the fifth lens. DETAILED DESCRIPTION

[0042] It should be noted that the embodiments in the present application and the imaging lens groups, lens barrel structures and spacer elements in the embodiments can be combined with each other without conflict, and are not limited to the combination of the imaging lens group in one embodiment with the lens barrel structure, spacer element, etc. of the embodiment. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0043] It should be noted that, unless otherwise specified, all technical and scientific terms used in the present application have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs.

[0044] 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" and "outer" refer 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.

[0045] It should be noted that, in the present specification, the expressions of first, second, third, etc. are only used to distinguish one feature from another feature, and do not represent any limitation on the features. Therefore, the first lens discussed below can also be referred to as the second lens or the third lens without departing from the teachings of the present application.

[0046] In the drawings, the thickness, size, and shape of the lenses have been exaggerated slightly for ease of explanation. Specifically, the shape of the spherical or aspherical surface is shown by way of example. That is, the shape of the spherical or aspherical surface is not limited to the shape of the spherical or aspherical surface shown in the drawings. The drawings are merely examples and are not strictly drawn to scale.

[0047] In this context, the paraxial region refers to a region near the optical axis. If the lens surface is convex and the position of the convex surface is not defined, it means that the lens surface is convex at least in the paraxial region. If the lens surface is concave and the position of the concave surface is not defined, it means that the lens surface is concave at least in the paraxial region. The judgment of the surface shape in the paraxial region can be made according to the judgment method of those skilled in the art, with the R value (R refers to the radius of curvature in the paraxial region, usually refers to the R value on the lens data in the optical software) to judge the convexity and concavity. With respect to the light entering side, when the R value is positive, it is determined to be convex, and when the R value is negative, it is determined to be concave. With respect to the light exiting side, when the R value is positive, it is determined to be concave, and when the R value is negative, it is determined to be convex.

[0048] In order to solve the problem of unstable assembly of the front camera lens in the prior art, the present application provides a camera lens.

[0049] Embodiment one

[0050] As shown in Figures 1 to 19 the camera lens sequentially comprises a first lens, a second lens, a third lens, a fourth lens, and a fifth lens from the light entering side to the light exiting side. The surface of the first lens facing the light entering side is convex, and the surface of the first lens facing the light exiting side is concave. At least one spacer is arranged between the first lens and the second lens, and the spacer in contact with the surface of the first lens facing the light exiting side among the spacers between the first lens and the second lens is the first spacer. At least one spacer is arranged between the second lens and the third lens, and the spacer in contact with the surface of the second lens facing the light exiting side among the spacers between the second lens and the third lens is the second spacer. The surface of the fourth lens facing the light entering side is concave, and the surface of the fourth lens facing the light exiting side is convex. At least one spacer is arranged between the third lens and the fourth lens, and the spacer in contact with the surface of the third lens facing the light exiting side among the spacers between the third lens and the fourth lens is the third spacer. The surface of the fifth lens facing the light exiting side is concave. At least one spacer is arranged between the fourth lens and the fifth lens, and the spacer in contact with the surface of the fourth lens facing the light exiting side among the spacers between the fourth lens and the fifth lens is the fourth spacer. The outer diameter D4s of the surface of the fourth spacer facing the light entering side, the inner diameter d4s of the surface of the fourth spacer facing the light entering side, the interval EP23 between the second spacer and the third spacer, and half of the maximum field angle Semi-FOV of the camera lens satisfy: 1.5 < (D4s-d4s) / EP23 TAN(Semi-FOV) < 8.5.

[0051] By setting at least one spacer between the two adjacent lenses, the reflection of light between the two adjacent lenses can be reduced, which helps to reduce the generation of stray light and ensure the imaging quality of the photographic lens. At the same time, assembling at least one spacer between the two adjacent lenses helps to adjust the distance between the two adjacent lenses to ensure the imaging quality of the photographic lens. In addition, the setting of the spacer can also ensure the stable support of the lens and ensure the stability of the lens assembly, effectively increasing the stability of the photographic lens group. By setting (D4s-d4s) / EP23 TAN(Semi-FOV) is controlled within a reasonable range, which can control the luminous flux of the fifth lens, and by controlling the size of the inner diameter of the fourth spacer, the external excess light can be blocked, and the stray light generated by the fifth lens can be improved, and the imaging quality of the photographic lens is improved, so as to improve the yield of the lens. At the same time, by controlling the maximum field of view and the interval between the second spacer and the third spacer within a reasonable range, the assembly requirement between the second lens, the third lens and the fourth lens, the reasonable control of the outer diameter of the light entrance side of the fourth spacer and the inner diameter of the light entrance side of the fourth spacer, ensures the contact area with the light exit side of the fourth lens, and limits the light entering the fifth lens, thereby controlling the size of the entire photographic lens rear end shape, to ensure the miniaturization of the photographic lens while ensuring the system field of view. Preferably, 1.7 < (D4s-d4s) / EP23 TAN(Semi-FOV) < 8.45.

[0052] It should be noted that the spacer can be a relatively thin light shielding piece or a relatively thick spacer ring to serve as a supporting and limiting function. Of course, the thickness of the multiple spacers between the two lenses can be the same or different, which needs to be designed according to actual needs. The thickness of the spacers between different lenses can be the same or different, which needs to be designed according to actual design needs.

[0053] The present application provides a small head wide-angle imaging lens, which can select different lenses, spacer elements and different assembly methods between lens barrels according to product use environment, for example, using lens clamping structure to increase the stability of eccentricity suitable for electronic devices with strict jitter parameters. Reasonably controlling the thickness of the lens can improve the quality of the lens, using the combination of spacers with different thicknesses to improve the appearance of the lens and avoid stray light; metal spacers can also be set to increase the assembly stability and strength, meeting the market demand.

[0054] For example, Figure 1As shown, the photographic lens further comprises a lens barrel 10, the first lens to the fifth lens and the spacers therebetween are located in the lens barrel 10. The structure between the first lens to the fifth lens is as a lens group, and the lens group is assembled in the lens barrel 10, so that the position of each lens is fixed, the misalignment and tilt of the lens are avoided, and the stability of the photographic lens is ensured. Meanwhile, the lens barrel 10 can protect the lens group, avoid the collision of other structural members to the lens, and effectively ensure the stability of the photographic lens.

[0055] In the embodiment, the inner diameter d0m of the surface of the lens barrel 10 towards the light-out side, the outer diameter D0m of the surface of the lens barrel 10 towards the light-out side, and the axial distance TD from the surface of the first lens towards the light-in side to the surface of the last lens towards the light-out side satisfy: (D0m-d0m) / TD>0. By limiting (D0m-d0m) / TD within a reasonable range, the color filter can be placed at the lens end or the module end to meet different requirements of customers, and can also be set according to the product shape size. In addition, such setting increases the freedom of the color filter placement position. Preferably, (D0m-d0m) / TD>0.3.

[0056] In the embodiment, the curvature radius R3 of the surface of the second lens towards the light-in side, the axial distance TD from the surface of the first lens towards the light-in side to the surface of the last lens towards the light-out side, and the maximum height L of the lens barrel 10 satisfy: R3 / TD+R3 / L<-19.0. By controlling R3 / TD+R3 / L within a reasonable range, the total length between the first lens to the last lens can be limited within a reasonable range, and at the same time, the maximum height of the lens barrel 10 is also limited within a reasonable range, so as to ensure the miniaturization of the photographic lens, and at the same time, the curvature radius of the second lens is controlled within a reasonable range, the control of the chief ray deflection angle can limit the height of the lens barrel 10, so as to ensure the wide-angle requirement of the photographic lens while taking into account the miniaturization feature. Preferably, -18.8

[0057] In the embodiment, the outer diameter D4s of the surface of the fourth spacer towards the light-in side, the inner diameter d4s of the surface of the fourth spacer towards the light-in side, and the curvature radius R8 of the surface of the fourth lens towards the light-out side satisfy: (D4s-d4s) / R8<-1.0. By controlling (D4s-d4s) / R8 within a reasonable range, the bearing area of the fourth spacer and the fourth lens can be ensured, and then the stability of the bearing between the fourth spacer and the fourth lens is ensured, and the assembly stability of the photographic lens is ensured. At the same time, such setting is conducive to controlling the surface shape of the surface of the fourth lens towards the light-out side, improving the processability of the fourth lens, increasing the yield, and at the same time, the quality of the fourth lens can be ensured. Preferably, -3

[0057] In the embodiment, the outer diameter D4s of the surface of the fourth spacer towards the light-in side, the inner diameter d4s of the surface of the fourth spacer towards the light-in side, and the curvature radius R8 of the surface of the fourth lens towards the light-out side satisfy: (D4s-d4s) / R8<-1.0. By controlling (D4s-d4s) / R8 within a reasonable range, the bearing area of the fourth spacer and the fourth lens can be ensured, and then the stability of the bearing between the fourth spacer and the fourth lens is ensured, and the assembly stability of the photographic lens is ensured. At the same time, such setting is conducive to controlling the surface shape of the surface of the fourth lens towards the light-out side, improving the processability of the fourth lens, increasing the yield, and at the same time, the quality of the fourth lens can be ensured. Preferably, -3

[0058] It should be noted that if there is only one spacer between the fourth lens and the fifth lens, it is the fourth spacer, in this case, controlling (D4s-d4s) / R8 within a reasonable range can ensure the bearing area of the fourth spacer with the fourth lens and the fifth lens, to ensure the stability of the bearing between the fourth spacer and the fourth lens and the fifth lens.

[0059] In the embodiment, the outer diameter D4m of the surface of the fourth spacer towards the light emitting side, the outer diameter D1m of the surface of the first spacer towards the light emitting side, the maximum thickness CP1 of the first spacer, the central thickness CT2 of the second lens on the optical axis, the central thickness CT3 of the third lens on the optical axis, and the interval EP34 between the third spacer and the fourth spacer satisfy: (D4m-D1m) / (CP1+CT2+CT3+EP34)>1.0. By controlling the distance between the third spacer and the fourth spacer, the thickness of the fourth lens can be controlled to reduce the deformation of the lens caused by the assembly temperature and improve the yield of lens processing and molding. Controlling the maximum thickness CP1 of the first spacer can effectively control the air gap between the first lens and the second lens, meet the stability of the assembly of the first lens and the second lens, control the central thickness CT2 of the second lens and the central thickness of the third lens, so that it is not easy to break in actual application, control the distance between the third spacer and the fourth spacer, meet the stability of the assembly, and ensure the miniaturization of the optical system, reasonably control the outer diameter of the surface of the first spacer towards the light emitting side and the outer diameter of the surface of the fourth spacer towards the light emitting side, and ensure the field angle of the system. Preferably, 1.3<(D4m-D1m) / (CP1+CT2+CT3+EP34)<6.

[0060] In this embodiment, the inner diameter d3s of the surface of the third spacer facing the light-incident side, the inner diameter d1s of the surface of the first spacer facing the light-incident side, the spacing EP12 between the first and second spacers, the center thickness CT2 of the second lens on the optical axis of the camera lens, the center thickness CT3 of the third lens on the optical axis, and the air gap T23 between the second and third lenses on the optical axis satisfy the following condition: (d3s-d1s) / (EP12+CT2+T23+CT3) > 0. By limiting (d3s-d1s) / (EP12+CT2+T23+CT3) within a reasonable range, the minimum inner diameters of the first and third spacers can be constrained, reducing stray light generated by excess light on the spacers and lenses. This effectively controls the relative illumination of the edge field of view, enabling the camera lens to still achieve clear imaging in low-light environments and ensuring good image quality. By appropriately setting the spacing between the first and second spacers, the stability of the system can be ensured, and the sensitivity of the gap between the first and second lenses can be reduced. By appropriately setting the center thickness of the second and third lenses, and limiting the air gap between them, while ensuring the center thicknesses of the two lenses meet the molding process requirements, the axial spacing between the second and third lenses is reasonably constrained. This allows light to diverge effectively after passing through the second lens, while the third lens bears the corresponding third-order distortion aberration, enabling the system to reasonably control distortion. Preferably, 0.5 < (d3s - d1s) / (EP12 + CT2 + T23 + CT3) < 2.

[0061] In this embodiment, the center thickness CT3 of the third lens on the optical axis of the camera lens, the center thickness CT4 of the fourth lens on the optical axis, the maximum thickness CP3 of the third spacer, and the maximum thickness CP4 of the fourth spacer satisfy the following relationship: CT3 / CP4 + CT4 / CP3 < 75. By controlling CT3 / CP4 + CT4 / CP3 within a reasonable range, the thickness of the third and fourth lenses can be controlled within a reasonable range, while ensuring the uniformity of the thickness of the third and fourth spacers, thus improving the stability of the camera lens structure. Preferably, 2 < CT3 / CP4 + CT4 / CP3 < 74.

[0062] In this embodiment, the spacing EP23 between the second and third spacers, the center thickness CT2 of the second lens on the optical axis of the camera lens, and the effective focal length f3 of the third lens satisfy the following condition: f3 / EP23 + f3 / CT2 > -320. By controlling f3 / EP23 + f3 / CT2 within a reasonable range, the distance between the second and third spacers can be controlled within a reasonable range, thereby controlling the edge thickness of the second lens within a reasonable range. Simultaneously, the center thickness of the second lens is controlled within a reasonable range to ensure the shape of the second lens and improve its quality. Furthermore, f3 / EP23 + f3 / CT2 can also limit the focal length of the third lens, controlling the deflection angle of the edge field of view on the third lens and effectively reducing the system's sensitivity. Controlling the spacing between the second and third spacers within a certain range ensures stable engagement between the lenses, reducing eccentricity sensitivity. Reasonably selecting the thickness and number of spacers reduces stray light generation and increases assembly stability. Preferably, -320 < f3 / EP23 + f3 / CT2 < 160.

[0063] In this embodiment, the distance EP12 between the first and second spacers, the distance EP34 between the third and fourth spacers, and the air gap T12 between the first and second lenses on the optical axis of the lens satisfy the following condition: (EP12+EP34) / T12 < 6.0. By controlling the distance between the first and second lenses, the light energy emitted from the first lens is ensured to enter the second lens precisely, guaranteeing that the lens can form an image. By controlling the distance between the first and second spacers and the distance between the third and fourth spacers, the stability of the assembly of the first, second, third, and fourth lenses is ensured, while effectively reducing the size of the lens head, which is beneficial for the miniaturization of the lens. Preferably, 1.5 < (EP12+EP34) / T12 < 5.9.

[0064] In this embodiment, at least one spacer between the fourth and fifth lenses is a metal spacer. The metal spacer between the fourth and fifth lenses improves assembly stability, effectively reduces deformation and field curvature variations in each field of view, and ensures the imaging stability of the camera lens.

[0065] Example 2

[0066] like Figures 1 to 19The photographic lens shown includes, from the light-incident side to the light-outcident side, a first lens, a second lens, a third lens, a fourth lens, and a fifth lens. The surface of the first lens facing the light-incident side is convex, and the surface of the first lens facing the light-outcident side is concave. At least one spacer is provided between the first and second lenses, and the spacer that contacts the surface of the first lens facing the light-outcident side is the first spacer. At least one spacer is provided between the second and third lenses, and the spacer that contacts the surface of the second lens facing the light-outcident side is the second spacer. The surface of the fourth lens facing the light-incident side is concave, and the surface of the fourth lens facing the light-outcident side is concave. The surface is convex; at least one spacer is provided between the third lens and the fourth lens, and the spacer that contacts the light-emitting side surface of the third lens is the third spacer; the surface of the fifth lens facing the light-emitting side is concave; at least one spacer is provided between the fourth lens and the fifth lens, and the spacer that contacts the light-emitting side surface of the fourth lens is the fourth spacer; the distance EP23 between the second spacer and the third spacer, the center thickness CT2 of the second lens on the optical axis of the camera lens, and the effective focal length f3 of the third lens satisfy: f3 / EP23+f3 / CT2>-320.

[0067] By placing at least one spacer between two adjacent lens elements, light reflection between them can be reduced, which helps to minimize stray light and ensure the image quality of the camera lens. Simultaneously, installing at least one spacer between adjacent lens elements allows for adjustment of the distance between them, ensuring image quality. Furthermore, the spacer ensures stable lens mounting, enhancing the stability of the lens assembly. By controlling f3 / EP23+f3 / CT2 within a reasonable range, the distance between the second and third spacers can be controlled within a reasonable range, thereby controlling the edge thickness and center thickness of the second lens element within a reasonable range, ensuring its shape and improving lens quality. Additionally, f3 / EP23+f3 / CT2 can limit the focal length of the third lens element, controlling the deflection angle of the edge field of view within the third lens element, effectively reducing system sensitivity. Controlling the distance between the second and third spacers within a certain range ensures stable engagement between the lenses, thereby reducing eccentricity sensitivity. Appropriate selection of the thickness and number of spacers reduces stray light generation and increases assembly stability.

[0068] Preferably, the spacing EP23 between the second and third spacers, the center thickness CT2 of the second lens on the optical axis of the camera lens, and the effective focal length f3 of the third lens satisfy the following: -320 < f3 / EP23 + f3 / CT2 < 160.

[0069] It should be noted that the spacer can be a relatively thin light-blocking component or a relatively thick spacer ring, in order to serve as a support and limiter.

[0070] Of course, the thickness of the multiple spacers between two lenses can be the same or different, depending on the specific requirements. Similarly, the thickness of the spacers between different lenses can also be the same or different, again depending on the actual design requirements.

[0071] like Figure 1 As shown, the camera lens also includes a lens barrel 10, within which the first to fifth lens elements, along with the lenses and spacers between them, are located. The structure between the first to fifth lens elements forms a lens group. Assembling this lens group within the lens barrel 10 fixes the position of each lens element, preventing misalignment or tilting and ensuring the stability of the camera lens during operation. Simultaneously, the lens barrel 10 protects the lens group from collisions with other structural components, effectively guaranteeing the stability of the camera lens during operation.

[0072] In this embodiment, the outer diameter D0s of the surface of the lens barrel 10 facing the light-incident side, the outer diameter D0m of the surface of the lens barrel 10 facing the light-outcident side, and the axial distance TD from the surface of the first lens facing the light-incident side to the surface of the last lens facing the light-outcident side satisfy the condition: (D0m-d0m) / TD>0. By limiting (D0m-d0m) / TD to a reasonable range, the color filter can be placed at the lens end or the module end to meet different customer needs, and can also be set according to the product's own external dimensions. Furthermore, this setting increases the freedom of color filter placement. Preferably, (D0m-d0m) / TD>0.3.

[0073] In this embodiment, the radius of curvature R3 of the surface of the second lens facing the light-incident side, the axial distance TD from the surface of the first lens facing the light-incident side to the surface of the last lens facing the light-outcident side, and the maximum height L of the lens barrel 10 satisfy the following condition: R3 / TD + R3 / L > -19.0. By controlling R3 / TD + R3 / L within a reasonable range, the overall length between the first and last lenses can be limited within a reasonable range, and the maximum height of the lens barrel 10 can also be limited within a reasonable range, thus ensuring the miniaturization of the photographic lens. Simultaneously, controlling the radius of curvature of the second lens within a reasonable range, and controlling the deflection angle of the principal ray, can limit the height of the lens barrel 10, ensuring the wide-angle requirements of the photographic lens while also considering its miniaturization. Preferably, -18.8 < R3 / TD + R3 / L < 60.

[0074] In this embodiment, the outer diameter D4s of the surface of the fourth spacer facing the light-incident side, the inner diameter d4s of the surface of the fourth spacer facing the light-incident side, and the radius of curvature R8 of the surface of the fourth lens facing the light-outcident side satisfy the following condition: (D4s-d4s) / R8 < -1.0. By controlling (D4s-d4s) / R8 within a reasonable range, the bearing area between the fourth spacer and the fourth lens can be guaranteed, thereby ensuring the stability of the bearing between the fourth spacer and the fourth lens and ensuring the stability of the camera lens assembly. At the same time, this setting is beneficial for controlling the surface shape of the surface of the fourth lens facing the light-outcident side, improving the manufacturability of the fourth lens, increasing the yield, and ensuring the quality of the fourth lens. Preferably, -3 < (D4s-d4s) / R8 < -1.2.

[0075] It should be noted that if there is only one spacer between the fourth and fifth lenses, then it is the fourth spacer. In this case, controlling (D4s-d4s) / R8 within a reasonable range can ensure the bearing area between the fourth spacer and the fourth and fifth lenses, so as to ensure the stability of the bearing between the fourth spacer and the fourth and fifth lenses.

[0076] In this embodiment, the outer diameter D4s of the surface of the fourth spacer facing the light-incident side, the inner diameter d4s of the surface of the fourth spacer facing the light-incident side, the distance EP23 between the second and third spacers, and half of the maximum field of view (Semi-FOV) of the camera lens satisfy the following condition: 1.5 < (D4s - d4s) / EP23 TAN(Semi-FOV) < 8.5. This is achieved by using (D4s-d4s) / EP23 By controlling the TAN (Semi-FOV) within a reasonable range, the light throughput of the fifth lens element can be controlled. Furthermore, by controlling the inner diameter of the fourth spacer, excess external light can be blocked, and stray light generated by the fifth lens element can be reduced, thus improving the image quality of the lens and increasing its yield. Simultaneously, by controlling the maximum field of view and the spacing between the second and third spacers within a reasonable range, and considering the assembly requirements of the second, third, and fourth lenses, the outer diameter and inner diameter of the fourth spacer on its light-incident side are rationally controlled. This ensures sufficient contact area with the light-emitting side of the fourth lens while limiting the light entering the fifth lens element, thereby controlling the overall size of the rear end of the lens. This ensures both lens miniaturization and a stable system field of view. Preferably, 1.7 < (D4s - d4s) / EP23 TAN(Semi-FOV) < 8.45.

[0077] In this embodiment, the outer diameter D4m of the surface of the fourth spacer facing the light-emitting side, the outer diameter D1m of the surface of the first spacer facing the light-emitting side, the maximum thickness CP1 of the first spacer, the center thickness CT2 of the second lens on the optical axis, the center thickness CT3 of the third lens on the optical axis, and the distance EP34 between the third and fourth spacers satisfy the following condition: (D4m-D1m) / (CP1+CT2+CT3+EP34)>1.0. By controlling the distance between the third and fourth spacers, the thickness of the fourth lens can be controlled to reduce the deformation of the lens due to assembly temperature and improve the yield of lens processing. Controlling the maximum thickness CP1 of the first spacer effectively controls the air gap between the first and second lenses, ensuring the stability of the assembly of the first and second lenses. Controlling the center thickness CT2 of the second lens and the center thickness of the third lens prevents breakage in practical applications. Controlling the distance between the third and fourth spacers ensures stable assembly while maintaining the miniaturization of the optical system. Reasonably controlling the outer diameter of the surface of the first spacer facing the light-emitting side and the outer diameter of the surface of the fourth spacer facing the light-emitting side guarantees the system's field of view. Preferably, 1.3 < (D4m - D1m) / (CP1 + CT2 + CT3 + EP34) < 6.

[0078] In this embodiment, the inner diameter d3s of the surface of the third spacer facing the light-incident side, the inner diameter d1s of the surface of the first spacer facing the light-incident side, the spacing EP12 between the first and second spacers, the center thickness CT2 of the second lens on the optical axis of the camera lens, the center thickness CT3 of the third lens on the optical axis, and the air gap T23 between the second and third lenses on the optical axis satisfy the following condition: (d3s-d1s) / (EP12+CT2+T23+CT3) > 0. By limiting (d3s-d1s) / (EP12+CT2+T23+CT3) within a reasonable range, the minimum inner diameters of the first and third spacers can be constrained, reducing stray light generated by excess light on the spacers and lenses. This effectively controls the relative illumination of the edge field of view, enabling the camera lens to still achieve clear imaging in low-light environments and ensuring good image quality. By appropriately setting the spacing between the first and second spacers, the stability of the system can be ensured, and the sensitivity of the gap between the first and second lenses can be reduced. By appropriately setting the center thickness of the second and third lenses, and limiting the air gap between them, while ensuring the center thicknesses of the two lenses meet the molding process requirements, the axial spacing between the second and third lenses is reasonably constrained. This allows light to diverge effectively after passing through the second lens, while the third lens bears the corresponding third-order distortion aberration, enabling the system to reasonably control distortion. Preferably, 0.5 < (d3s - d1s) / (EP12 + CT2 + T23 + CT3) < 2.

[0079] In this embodiment, the center thickness CT3 of the third lens on the optical axis of the camera lens, the center thickness CT4 of the fourth lens on the optical axis, the maximum thickness CP3 of the third spacer, and the maximum thickness CP4 of the fourth spacer satisfy the following relationship: CT3 / CP4 + CT4 / CP3 < 75. By controlling CT3 / CP4 + CT4 / CP3 within a reasonable range, the thickness of the third and fourth lenses can be controlled within a reasonable range, while ensuring the uniformity of the thickness of the third and fourth spacers, thus improving the stability of the camera lens structure. Preferably, 2 < CT3 / CP4 + CT4 / CP3 < 74.

[0080] In this embodiment, the distance EP12 between the first and second spacers, the distance EP34 between the third and fourth spacers, and the air gap T12 between the first and second lenses on the optical axis of the lens satisfy the following condition: (EP12+EP34) / T12 < 6.0. By controlling the distance between the first and second lenses, the light energy emitted from the first lens is ensured to enter the second lens precisely, guaranteeing that the lens can form an image. By controlling the distance between the first and second spacers and the distance between the third and fourth spacers, the stability of the assembly of the first, second, third, and fourth lenses is ensured, while effectively reducing the size of the lens head, which is beneficial for the miniaturization of the lens. Preferably, 1.5 < (EP12+EP34) / T12 < 5.9.

[0081] In this embodiment, at least one spacer between the fourth and fifth lenses is a metal spacer. The metal spacer between the fourth and fifth lenses improves assembly stability, effectively reduces deformation and field curvature variations in each field of view, and ensures the imaging stability of the camera lens.

[0082] Optionally, the aforementioned photographic lens may also include a filter for correcting color deviation and / or a protective glass for protecting the photosensitive element located on the imaging surface.

[0083] The photographic lens in this application can employ multiple lens elements, such as the five elements mentioned above. By rationally allocating the optical power, surface shape, center thickness of each lens element, and on-axis distance between each lens element, the aperture of the photographic lens can be effectively increased, the sensitivity of the lens can be reduced, and the manufacturability of the lens can be improved, making the photographic lens more conducive to production and processing and suitable for portable electronic devices such as smartphones.

[0084] In this application, at least one of the lens surfaces is an aspherical lens. An aspherical lens is characterized by a continuously changing curvature from its center to its periphery. Unlike spherical lenses, which have a constant curvature from their center to their periphery, aspherical lenses possess superior curvature radius characteristics, offering advantages in improving distortion and astigmatism. By employing aspherical lenses, aberrations occurring during image formation can be eliminated as much as possible, thereby improving image quality.

[0085] However, those skilled in the art will understand that the number of lenses constituting the photographic lens can be varied to obtain the various results and advantages described herein without departing from the technical solutions claimed in this application. For example, although five lenses are described as an example in the embodiments, the photographic lens is not limited to including five lenses. If necessary, the photographic lens may also include other numbers of lenses.

[0086] Figure 1 A schematic diagram of the structure of a photographic lens of this application is shown, wherein Figure 1 The diagram clearly shows parameters such as d1s, D1S, and D1m to provide a clear and intuitive understanding of their meaning. For ease of reference to lens structure and specific surface shapes, these parameters will not be shown in the accompanying diagrams when illustrating specific examples.

[0087] Figure 20 The image shows a stray light path in one of the photographic lenses in the application. Figure 20 The light beam passes through the first lens and enters the second lens, then is reflected by the surface of the third lens towards the light-emitting side. After being reflected by the second spacer P2, a portion of the stray light is absorbed. Then, some of the stray light is reflected by the second spacer P2 to the third spacer P3 and absorbed. Of course... Figure 20 The paper only shows one optical path for stray light absorption, but the optical paths for stray light absorption will also be different for different structures. The structural design in this application can reduce the generation of stray light.

[0088] The following description, with reference to the accompanying drawings, further illustrates examples of specific surface shapes and parameters of photographic lenses applicable to the above embodiments.

[0089] It should be noted that the following example includes both a first state and a second state. In the same example, the curvature radius, center thickness, and other parameters of the first, second, third, fourth, and fifth lenses of the photographic lens, as well as the spacing between the lenses and the higher-order image coefficients, are the same in both the first and second states. However, the parameters of the lens barrel 10, the thickness of the spacers, the inner and outer diameters of the spacers, and the distance between the spacers are different, and the shapes of some lenses are also different. In other words, the main structure used for imaging is the same, but the auxiliary structures used for imaging are different.

[0090] It should be noted that any of the examples one through three below are applicable to all embodiments of this application.

[0091] Example 1

[0092] like Figures 2 to 7 As shown, the photographic lens of Example 1 of this application is described. Figure 2 This shows a schematic diagram of the camera lens in Example 1 in its first state. Figure 3 A schematic diagram of the camera lens in Example 1 in its second state is shown.

[0093] like Figure 2 and Figure 3 As shown, the camera lens includes, in sequence from the light-incident side to the light-outcident side: first lens E1, first spacer P1, second lens E2, second spacer P2, third lens E3, third spacer P3, seventh spacer P3b, fourth lens E4, fourth spacer P4, fifth spacer P4b, and fifth lens E5.

[0094] exist Figure 2 In this configuration, both the first lens E1 and the second lens E2 rest against the first spacer P1, and in other positions, the first lens E1 and the second lens E2 are spaced apart. There are two spacers between the third lens E3 and the fourth lens E4 to achieve a primary step difference setting, and two spacers between the fourth lens E4 and the fifth lens E5 to achieve a secondary step difference setting. This achieves a large step difference while facilitating the stable support of each structure.

[0095] exist Figure 3 In the process, the first lens E1 and the second lens E2 are fastened together to form a fastening structure. The first spacer P1 is disposed on the inner side of the fastening structure, while the first lens E1 and the second lens E2 abut against each other in the outer area of ​​the first spacer P1.

[0096] The first lens has a convex incident light side S1 and a concave exit light side S2. The second lens has a convex incident light side S3 and a concave exit light side S4. The third lens E3 has positive optical power; its convex incident light side S5 and concave exit light side S6. The fourth lens has a concave incident light side S7 and a convex exit light side S8. The fifth lens has a concave incident light side S9 and a concave exit light side S10. Light from the object passes sequentially through surfaces S1 to S10 and is finally imaged on the imaging plane.

[0097] In this example, the axial distance TD from the surface of the first lens facing the light-incident side to the surface of the last lens facing the light-outcident side is 2.89 mm, and the maximum semi-FOV of the camera lens is 44.1°.

[0098] Table 1 shows the basic structural parameters of the photographic lens in Example 1, where the units for radius of curvature, thickness / distance, focal length, and effective radius are all millimeters (mm).

[0099]

[0100] Table 1

[0101] In Example 1, the incident and exit surfaces of any one of the lenses, from the first lens E1 to the fifth lens E5, are aspherical. The surface shape of each aspherical lens can be defined using, but is not limited to, the following aspherical formula:

[0102] Formula 1

[0103] Where x is the distance vector from the vertex of the aspherical surface at a height h along the optical axis; c is the paraxial curvature of the aspherical surface, c = 1 / R, that is, the paraxial curvature c is the reciprocal of the radius of curvature R in Table 1 above; k is the conic coefficient; Ai is the i-th order correction coefficient of the aspherical surface. Table 2 below gives the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, A30 that can be used for the aspherical mirrors S1-S10 in Example 1.

[0104]

[0105] Table 2

[0106] Figure 4 The on-axis chromatic aberration curve of the camera lens in Example 1 is shown, which indicates the deflection of the focal point of light of different wavelengths after passing through the camera lens. Figure 5 The astigmatism curve of the photographic lens in Example 1 is shown, which represents the curvature of the meridional image plane and the curvature of the sagittal image plane. Figure 6 The distortion curve of the camera lens in Example 1 is shown, which represents the distortion magnitude corresponding to different field of view angles. Figure 7 The magnification chromatic aberration curve of the camera lens in Example 1 is shown, which represents the deviation of light at different image heights on the imaging plane after passing through the camera lens.

[0107] according to Figures 4 to 7 As can be seen, the camera lens given in Example 1 can achieve good image quality.

[0108] Example 2

[0109] like Figures 8 to 13 As shown, the photographic lens of Example 2 of this application is described. Figure 8 A schematic diagram of the camera lens in Example 2 in its first state is shown. Figure 9A schematic diagram of the camera lens in Example 2 in its second state is shown.

[0110] like Figure 8 and Figure 9 As shown, the camera lens, from the light-incident side to the light-outcident side, includes the following components in sequence: first lens E1, first spacer P1, second lens E2, second spacer P2, third lens E3, third spacer P3, fourth lens E4, fourth spacer P4, fifth spacer P4b, and fifth lens E5.

[0111] exist Figure 8 The second spacer P2 is sandwiched between the second lens E2 and the third lens E3, and the remaining positions of the second lens E2 and the third lens E3 are spaced apart.

[0112] exist Figure 9 The second lens E2 and the third lens E3 are fastened together to form a fastening structure, and the second spacer P2 is located inside the fastening structure, that is, the second spacer P2 is spaced apart from the inner wall surface of the lens barrel.

[0113] The first lens has a convex incident light side S1 and a concave exit light side S2. The second lens has a concave incident light side S3 and a convex exit light side S4. The third lens E3 has negative optical power; its incident light side S5 is convex and its exit light side S6 is concave. The fourth lens has a concave incident light side S7 and a convex exit light side S8. The fifth lens has a convex incident light side S9 and a concave exit light side S10. Light from the object passes sequentially through surfaces S1 to S10 and is finally imaged on the imaging plane.

[0114] In this example, the axial distance TD from the surface of the first lens facing the light-incident side to the surface of the last lens facing the light-outcident side is 2.32 mm, and the maximum semi-FOV of the camera lens is 49.9°.

[0115] Table 3 shows the basic structural parameters of the photographic lens in Example 2, where the units for radius of curvature, thickness / distance, focal length, and effective radius are all millimeters (mm).

[0116]

[0117] Table 3

[0118] Table 4 shows the higher-order coefficients that can be used for each aspherical mirror in Example 2, wherein each aspherical surface shape can be defined by Formula 1 given in Example 1 above.

[0119]

[0120] Table 4

[0121] Figure 10 The on-axis chromatic aberration curve of the camera lens in Example 2 is shown, which indicates the deflection of the focal point of light of different wavelengths after passing through the camera lens. Figure 11 The astigmatism curve of the camera lens in Example 2 is shown, which represents the curvature of the meridional image plane and the curvature of the sagittal image plane. Figure 12 The distortion curve of the camera lens in Example 2 is shown, which represents the distortion magnitude corresponding to different field of view angles. Figure 13 The magnification chromatic aberration curve of the camera lens in Example 2 is shown, which represents the deviation of light at different image heights on the imaging plane after passing through the camera lens.

[0122] according to Figures 10 to 13 As can be seen, the camera lens given in Example 2 can achieve good image quality.

[0123] Example 3

[0124] like Figures 14 to 19 As shown, the photographic lens of Example 3 of this application is described. Figure 14 A schematic diagram of the camera lens in Example 3 in its first state is shown. Figure 15 A schematic diagram of the camera lens in Example 3 in the second state is shown.

[0125] like Figure 14 and Figure 15 As shown, the camera lens, from the light-incident side to the light-outcident side, includes the following components in sequence: first lens E1, first spacer P1, second lens E2, second spacer P2, third lens E3, third spacer P3, fourth lens E4, fourth spacer P4, fifth spacer P4b, and fifth lens E5.

[0126] exist Figure 14 In the first lens E1 and the second lens E2, there are two spacers, namely the first spacer P1 and the sixth spacer P1b. The thickness of the first spacer P1 is less than the thickness of the sixth spacer P1b.

[0127] exist Figure 15 In this structure, there is a spacer, namely the first spacer P1, between the first lens E1 and the second lens E2. The first lens E1 and the second lens E2 are fastened together to form a fastening structure, and the first spacer P1 is disposed on the inner side of the fastening structure.

[0128] The first lens has a convex incident light side S1 and a concave exit light side S2. The second lens has a convex incident light side S3 and a concave exit light side S4. The third lens E3 has positive optical power; its incident light side S5 is convex and its exit light side S6 is concave. The fourth lens has a concave incident light side S7 and a convex exit light side S8. The fifth lens has a convex incident light side S9 and a concave exit light side S10. Light from the object passes sequentially through surfaces S1 to S10 and is finally imaged on the imaging plane.

[0129] In this example, the axial distance TD from the surface of the first lens facing the light-incident side to the surface of the last lens facing the light-outcident side is 2.69 mm, and the maximum semi-FOV of the camera lens is 50.9°.

[0130] Table 5 shows the basic structural parameters of the photographic lens in Example 3, where the units for radius of curvature, thickness / distance, focal length, and effective radius are all millimeters (mm).

[0131]

[0132] Table 5

[0133] Table 6 shows the higher-order coefficients that can be used for each aspherical mirror in Example 3, wherein each aspherical surface shape can be defined by Formula 1 given in Example 1 above.

[0134]

[0135] Table 6

[0136] Figure 16 The on-axis chromatic aberration curve of the camera lens in Example 3 is shown, which indicates the deflection of the focal point of light of different wavelengths after passing through the camera lens. Figure 17 The astigmatism curve of the camera lens in Example 3 is shown, which represents the curvature of the meridional image plane and the curvature of the sagittal image plane. Figure 18 The distortion curve of the camera lens in Example 3 is shown, which represents the distortion magnitude corresponding to different field of view angles. Figure 19 The magnification chromatic aberration curve of the camera lens in Example 3 is shown, which represents the deviation of light at different image heights on the imaging plane after passing through the camera lens.

[0137] according to Figures 16 to 19 As can be seen, the camera lens given in Example 3 can achieve good image quality.

[0138] In summary, Examples 1 to 3 satisfy the relationships shown in Table 7.

[0139]

[0140] Table 7

[0141] Table 8 provides the camera lens parameters for Examples 1 to 3.

[0142]

[0143] Table 8

[0144] It should be noted that in Table 8, 1-1 represents some parameters of the camera lens in Example 1 in the first state, 1-2 represents some parameters of the camera lens in Example 1 in the second state, 2-1 represents some parameters of the camera lens in Example 2 in the first state, 2-2 represents some parameters of the camera lens in Example 2 in the second state, 3-1 represents some parameters of the camera lens in Example 3 in the first state, and 3-2 represents some parameters of the camera lens in Example 3 in the second state.

[0145] Table 9 shows the effective focal length f3 of the third lens in Examples 1 to 3.

[0146]

[0147] Table 9

[0148] This application also provides an imaging device, whose electronic photosensitive element can be a photocoupled device (CCD) or a complementary metal oxide semiconductor device (CMOS). The imaging device can be a stand-alone imaging device such as a digital camera, or an imaging module integrated into a mobile electronic device such as a mobile phone. The imaging device is equipped with the photographic lens described above.

[0149] Obviously, the embodiments described above are merely some, not all, embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort should fall within the scope of protection of the present invention.

[0150] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0151] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0152] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A photographic lens, characterized in that, From the input side to the output side, the following are included in sequence: The first lens has positive optical power, the surface of the first lens facing the light-incident side is convex, and the surface of the first lens facing the light-outcident side is concave. Second lens; At least one spacer is provided between the first lens and the second lens, and the spacer that contacts the surface of the first lens facing the light-emitting side is the first spacer; The third lens has a convex surface facing the light-incident side and a concave surface facing the light-out side. At least one spacer is provided between the second lens and the third lens, and the spacer that contacts the surface of the second lens facing the light-emitting side is the second spacer; The fourth lens has positive optical power, the surface of the fourth lens facing the light-incident side is concave, and the surface of the fourth lens facing the light-outcident side is convex. At least one spacer is provided between the third lens and the fourth lens, and the spacer that contacts the surface of the third lens facing the light-emitting side is the third spacer; The fifth lens has negative optical power, and the surface of the fifth lens facing the light-emitting side is concave. At least one spacer is provided between the fourth lens and the fifth lens, and the spacer that contacts the surface of the fourth lens facing the light-emitting side is the fourth spacer. The lens barrel (10) contains the first lens to the fifth lens and the lenses and spacers between them. The outer diameter D4s of the surface of the fourth spacer facing the light-incident side, the inner diameter d4s of the surface of the fourth spacer facing the light-incident side, the distance EP23 between the second spacer and the third spacer, and half of the maximum field of view (Semi-FOV) of the camera lens satisfy the following condition: 1.83 ≤ (D4s - d4s) / EP23 TAN(Semi-FOV)≤8.38; The radius of curvature R3 of the surface of the second lens facing the light-incident side, the axial distance TD from the surface of the first lens facing the light-incident side to the surface of the last lens facing the light-outcident side, and the maximum height L of the lens barrel (10) satisfy the following: -18.74≤R3 / TD+R3 / L≤51.

53.

2. The photographic lens according to claim 1, characterized in that, The inner diameter d0m of the surface of the lens barrel (10) facing the light-emitting side, the outer diameter D0m of the surface of the lens barrel (10) facing the light-emitting side, and the axial distance TD from the surface of the first lens facing the light-incident side to the surface of the last lens facing the light-emitting side satisfy the following condition: 0.41≤(D0m-d0m) / TD≤1.

79.

3. The photographic lens according to claim 1, characterized in that, The outer diameter D4s of the surface of the fourth spacer facing the light-incident side, the inner diameter d4s of the surface of the fourth spacer facing the light-incident side, and the radius of curvature R8 of the surface of the fourth lens facing the light-outcident side satisfy the following condition: -2.98≤(D4s-d4s) / R8≤-1.

30.

4. The photographic lens according to claim 1, characterized in that, The outer diameter D4m of the surface of the fourth spacer facing the light-emitting side, the outer diameter D1m of the surface of the first spacer facing the light-emitting side, the maximum thickness CP1 of the first spacer, the center thickness CT2 of the second lens on the optical axis, the center thickness CT3 of the third lens on the optical axis, and the interval EP34 between the third spacer and the fourth spacer satisfy the following: 1.42≤(D4m-D1m) / (CP1+CT2+CT3+EP34)≤5.

44.

5. The photographic lens according to claim 1, characterized in that, The inner diameter d3s of the surface of the third spacer facing the light-incident side, the inner diameter d1s of the surface of the first spacer facing the light-incident side, the spacing EP12 between the first spacer and the second spacer, the center thickness CT2 of the second lens on the optical axis of the camera lens, the center thickness CT3 of the third lens on the optical axis, and the air gap T23 between the second lens and the third lens on the optical axis satisfy the following: 0.81≤(d3s-d1s) / (EP12+CT2+T23+CT3)≤1.

53.

6. The photographic lens according to claim 1, characterized in that, The central thickness CT3 of the third lens on the optical axis of the photographic lens, the central thickness CT4 of the fourth lens on the optical axis, the maximum thickness CP3 of the third spacer, and the maximum thickness CP4 of the fourth spacer satisfy the following condition: 3.58≤CT3 / CP4+CT4 / CP3≤73.

06.

7. The photographic lens according to claim 1, characterized in that, The interval EP23 between the second spacer and the third spacer, the center thickness CT2 of the second lens on the optical axis of the camera lens, and the effective focal length f3 of the third lens satisfy the following: -314.24≤f3 / EP23+f3 / CT2≤151.

13.

8. The photographic lens according to claim 1, characterized in that, The distance EP12 between the first spacer and the second spacer, the distance EP34 between the third spacer and the fourth spacer, and the air gap T12 between the first lens and the second lens on the optical axis of the camera lens satisfy the following: 1.97≤(EP12+EP34) / T12≤5.

84.

9. The photographic lens according to any one of claims 1 to 8, characterized in that, At least one of the spacers between the fourth lens and the fifth lens is a metal spacer.

10. A photographic lens, characterized in that, From the input side to the output side, the following are included in sequence: The first lens has positive optical power, the surface of the first lens facing the light-incident side is convex, and the surface of the first lens facing the light-outcident side is concave. Second lens; At least one spacer is provided between the first lens and the second lens, and the spacer that contacts the surface of the first lens facing the light-emitting side is the first spacer; The third lens has a convex surface facing the light-incident side and a concave surface facing the light-out side. At least one spacer is provided between the second lens and the third lens, and the spacer that contacts the surface of the second lens facing the light-emitting side is the second spacer; The fourth lens has positive optical power, the surface of the fourth lens facing the light-incident side is concave, and the surface of the fourth lens facing the light-outcident side is convex. At least one spacer is provided between the third lens and the fourth lens, and the spacer that contacts the surface of the third lens facing the light-emitting side is the third spacer; The fifth lens has negative optical power, and the surface of the fifth lens facing the light-emitting side is concave. At least one spacer is provided between the fourth lens and the fifth lens, and the spacer that contacts the surface of the fourth lens facing the light-emitting side is the fourth spacer. The lens barrel (10) contains the first lens to the fifth lens and the lenses and spacers between them. Wherein, the interval EP23 between the second spacer and the third spacer, the center thickness CT2 of the second lens on the optical axis of the photographic lens, and the effective focal length f3 of the third lens satisfy the following: -314.24≤f3 / EP23+f3 / CT2≤151.13; The radius of curvature R3 of the surface of the second lens facing the light-incident side, the axial distance TD from the surface of the first lens facing the light-incident side to the surface of the last lens facing the light-outcident side, and the maximum height L of the lens barrel (10) satisfy the following: -18.74≤R3 / TD+R3 / L≤51.

53.

11. The photographic lens according to claim 10, characterized in that, The inner diameter d0m of the surface of the lens barrel (10) facing the light-emitting side, the outer diameter D0m of the surface of the lens barrel (10) facing the light-emitting side, and the axial distance TD from the surface of the first lens facing the light-incident side to the surface of the last lens facing the light-emitting side satisfy the following condition: 0.41≤(D0m-d0m) / TD≤1.

79.

12. The photographic lens according to claim 10, characterized in that, The outer diameter D4s of the surface of the fourth spacer facing the light-incident side, the inner diameter d4s of the surface of the fourth spacer facing the light-incident side, and the radius of curvature R8 of the surface of the fourth lens facing the light-outcident side satisfy the following condition: -2.98≤(D4s-d4s) / R8≤-1.

30.

13. The photographic lens according to claim 10, characterized in that, The outer diameter D4m of the surface of the fourth spacer facing the light-emitting side, the outer diameter D1m of the surface of the first spacer facing the light-emitting side, the maximum thickness CP1 of the first spacer, the center thickness CT2 of the second lens on the optical axis, the center thickness CT3 of the third lens on the optical axis, and the interval EP34 between the third spacer and the fourth spacer satisfy the following: 1.42≤(D4m-D1m) / (CP1+CT2+CT3+EP34)≤5.

44.

14. The photographic lens according to claim 10, characterized in that, The inner diameter d3s of the surface of the third spacer facing the light-incident side, the inner diameter d1s of the surface of the first spacer facing the light-incident side, the spacing EP12 between the first spacer and the second spacer, the center thickness CT2 of the second lens on the optical axis of the camera lens, the center thickness CT3 of the third lens on the optical axis, and the air gap T23 between the second lens and the third lens on the optical axis satisfy the following: 0.81≤(d3s-d1s) / (EP12+CT2+T23+CT3)≤1.

53.

15. The photographic lens according to claim 10, characterized in that, The central thickness CT3 of the third lens on the optical axis of the photographic lens, the central thickness CT4 of the fourth lens on the optical axis, the maximum thickness CP3 of the third spacer, and the maximum thickness CP4 of the fourth spacer satisfy the following condition: 3.58≤CT3 / CP4+CT4 / CP3≤73.

06.

16. The photographic lens according to claim 10, characterized in that, The distance EP12 between the first spacer and the second spacer, the distance EP34 between the third spacer and the fourth spacer, and the air gap T12 between the first lens and the second lens on the optical axis of the camera lens satisfy the following: 1.97≤(EP12+EP34) / T12≤5.

84.

17. The photographic lens according to any one of claims 10 to 16, characterized in that, At least one of the spacers between the fourth lens and the fifth lens is a metal spacer.

Images