Optical imaging lens

Abstract

The utility model discloses an optical imaging lens, and the optical imaging lens comprises a lens barrel, and a lens group and a separator group which are disposed in the lens barrel, and the lens group comprises a first lens with negative focal power, a second lens with negative focal power, and a third lens with negative focal power, the second lens has positive focal power; the third lens has positive focal power; the fourth lens and the fifth lens have focal power; the following conditions are satisfied: 0.4 lt; (EP12 + EP23) / (CT2 + CT3) lt; 1.0 and 4 lt; d2s / (SAG22 + SAG31) lt; eP12 is the distance from the image side face of the first isolation piece to the object side face of the second isolation piece in the optical axis direction, EP23 is the distance from the image side face of the second isolation piece to the object side face of the third isolation piece in the optical axis direction, CT2 is the center thickness of the second lens on the optical axis, CT3 is the center thickness of the third lens on the optical axis, d2s is the inner diameter of the object side face of the second isolation piece, and d2s is the inner diameter of the object side face of the third isolation piece. SAG22 is the axial distance between the intersection point of the image side face of the second lens and the optical axis and the effective radius vertex of the image side face of the second lens, and SAG31 is the axial distance between the intersection point of the object side face of the third lens and the optical axis and the effective radius vertex of the object side face of the third lens.

Description

Technical Field

[0001] The present application relates to the field of optical elements, and in particular, to an optical imaging lens. Background Art

[0002] In recent years, with the improvement of people's living standards, drones have gradually entered the public's field of vision. In order to better improve people's experience of using drones, the development of drone automation and intelligence is imperative. Obstacle avoidance technology is one of the key links to achieve this goal. A perfect obstacle avoidance system can reduce injuries to personnel or damage to drones caused by operating errors. As the core component of obstacle avoidance technology, obstacle avoidance lenses will be fully applied with the development of intelligent drones, and their application prospects are broad.

[0003] Obstacle avoidance lenses generally use large-aperture, ultra-wide-angle lenses. This type of lens has a large light transmittance and a wide field of view. However, this also increases the difficulty of light control, which makes it easy for stray light to appear in the lens, resulting in unsatisfactory imaging quality of the lens. Usually, a spacer is set between the lenses to block some stray light at the edge of the lens. At the same time, the spacer can also support the lens and the lens barrel to improve the assembly stability of the lens in the lens. However, if the design of the spacer is unreasonable, many problems will arise. For example, if the spacer is too short, it cannot effectively solve the stray light problem; if the spacer is too long, it will cause the unsupported part of the spacer to bend. Therefore, in order to ensure the assembly yield and imaging quality of the optical imaging lens, the design of the spacer is particularly important. Utility Model Content

[0004] The first aspect of the present application provides an optical imaging lens, which includes: a lens barrel, and a lens group and a spacer group disposed within the lens barrel. Among them, the lens group sequentially includes, from the object side to the image side along the optical axis: a first lens with a negative optical power; a second lens with a positive optical power, whose object side is convex and image side is concave; a third lens with a positive optical power, whose object side is convex and image side is convex; a fourth lens with an optical power; and a fifth lens with an optical power; the spacer group includes: a first spacer disposed between the first lens and the second lens and at least partially contacting the image side of the first lens; a second spacer disposed between the second lens and the third lens and at least partially contacting the image side of the second lens; and a third spacer disposed between the third lens and the fourth lens and at least partially contacting the object side of the fourth lens; the optical imaging lens satisfies: 0.4 < (EP12 + EP23) / (CT2 + CT3) < 1.0 and 4 < d2s / (SAG22 + SAG31) < 11, where EP12 is the distance along the optical axis from the image side of the first spacer to the object side of the second spacer, EP23 is the distance along the optical axis from the image side of the second spacer to the object side of the third spacer, CT2 is the central thickness of the second lens on the optical axis, CT3 is the central thickness of the third lens on the optical axis, d2s is the inner diameter of the object side of the second spacer, SAG22 is the axial distance from the intersection of the image side of the second lens and the optical axis to the effective radius vertex of the image side of the second lens, and SAG31 is the axial distance from the intersection of the object side of the third lens and the optical axis to the effective radius vertex of the object side of the third lens.

[0005] In one embodiment, the optical imaging lens satisfies: -0.2 < (d1s - d2s) / f2 < 0.4, where d1s is the inner diameter of the object side of the first spacer, d2s is the inner diameter of the object side of the second spacer, and f2 is the effective focal length of the second lens.

[0006] In one embodiment, the optical imaging lens satisfies: -6 < d0s / R1 - d1s / R2 < -1, where d0s is the inner diameter of the object side end face of the lens barrel, d1s is the inner diameter of the object side of the first spacer, R1 is the curvature radius of the object side of the first lens, and R2 is the curvature radius of the image side of the first lens.

[0007] In one embodiment, the optical imaging lens satisfies: 0.5 < (D0s - D1s) / (DT11 - DT12) < 0.7, where D0s is the outer diameter of the object side end face of the lens barrel, D1s is the outer diameter of the object side of the first spacer, DT11 is the diameter of the light-transmitting part of the object side of the first lens, and DT12 is the diameter of the light-transmitting part of the image side of the first lens.

[0008] In one embodiment, the optical imaging lens satisfies: -1 < (D1m - d1s) / (f1 - f2) < 0, where D1m is the outer diameter of the image side of the first spacer, d1s is the inner diameter of the object side of the first spacer, f1 is the effective focal length of the first lens, and f2 is the effective focal length of the second lens.

[0009] In one embodiment, the optical imaging lens satisfies: 0 < D2s / DT22 - D2m / DT31 < 0.5, where D2s is the outer diameter of the object side of the second spacer, D2m is the outer diameter of the image side of the second spacer, DT22 is the diameter of the light-transmitting portion of the image side of the second lens, and DT31 is the diameter of the light-transmitting portion of the object side of the third lens.

[0010] In one embodiment, the optical imaging lens satisfies: -2 < d3s / f3 - d3m / f4 < 2, where d3s is the inner diameter of the object side of the third spacer, d3m is the inner diameter of the image side of the third spacer, f3 is the effective focal length of the third lens, and f4 is the effective focal length of the fourth lens.

[0011] In one embodiment, the optical imaging lens satisfies: 0 < (D2m - D3s) / CT3 < 3, where D2m is the outer diameter of the image side of the second spacer, D3s is the outer diameter of the object side of the third spacer, and CT3 is the central thickness of the third lens on the optical axis.

[0012] In one embodiment, the spacer group further includes: a fourth spacer disposed between the fourth lens and the fifth lens and at least partially contacting the image side of the fourth lens; the optical imaging lens satisfies: -1 < (D4m - d4s) / (f4 - f5) < 0.5, where D4m is the outer diameter of the image side of the fourth spacer, d4s is the inner diameter of the object side of the fourth spacer, f4 is the effective focal length of the fourth lens, and f5 is the effective focal length of the fifth lens.

[0013] In one embodiment, the spacer group further includes: a fourth spacer disposed between the fourth lens and the fifth lens and at least partially contacting the image side of the fourth lens; the optical imaging lens satisfies: -2 < d4m / (R8 + R9) < 1, where d4m is the inner diameter of the image side of the fourth spacer, R8 is the radius of curvature of the image side of the fourth lens, and R9 is the radius of curvature of the object side of the fifth lens.

[0014] In one embodiment, the spacer group further includes: a fourth spacer disposed between the fourth lens and the fifth lens and at least partially in contact with the image side surface of the fourth lens; the optical imaging lens satisfies: 3 < D4m / (DT51 + D0m / DT52) < 5, where D4m is the outer diameter of the image side surface of the fourth spacer, D0m is the outer diameter of the image side end surface of the lens barrel, DT51 is the diameter of the light-transmitting portion of the object side surface of the fifth lens, and DT52 is the diameter of the light-transmitting portion of the image side surface of the fifth lens.

[0015] In one embodiment, the spacer group further includes: a fourth spacer disposed between the fourth lens and the fifth lens and at least partially in contact with the image side surface of the fourth lens; the optical imaging lens satisfies: -2 < d3m / R7 + d4s / R8 < 3, where d3m is the inner diameter of the image side surface of the third spacer, d4s is the inner diameter of the object side surface of the fourth spacer, R7 is the curvature radius of the object side surface of the fourth lens, and R8 is the curvature radius of the image side surface of the fourth lens.

[0016] The present application provides a five-piece optical imaging lens. By controlling that the sum of the distances between the first spacer and the second spacer and between the second spacer and the third spacer is more than two-fifths of the sum of the central thicknesses of the second lens and the third lens, and satisfying 0.4 < (EP12 + EP23) / (CT2 + CT3) < 1.0, and the object side surface of the second lens is convex and the image side surface is concave, and the object side surface of the third lens is convex, it is possible to avoid too large a difference in thickness between the non-light-transmitting portion and the light-transmitting portion of the second lens and the third lens, thereby facilitating the control of the light path between the second lens and the third lens and avoiding the generation of some stray light. At the same time, the present application also controls d2s, SAG22, and SAG31 to satisfy 4 < d2s / (SAG22 + SAG31) < 11, which can ensure that the inner diameter of the second spacer is within a reasonable range and effectively improve the problem of reflected stray light between the second lens and the third lens. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Other features, objects, and advantages of the present application will become more apparent by reading the detailed description of the non-limiting embodiments with reference to the following drawings:

[0018] Figure 1 Shows a structural layout diagram of an optical imaging lens and a schematic diagram of some parameters according to the present application;

[0019] Figure 2A Shows a schematic structural diagram of the optical imaging lens according to Embodiment 1 of the present application;

[0020] Figure 2B Shows a schematic structural diagram of the optical imaging lens according to Embodiment 2 of the present application;

[0021] Figure 2C A schematic structural diagram of an optical imaging lens according to Embodiment 3 of the present application is shown;

[0022] FIG. 3A to FIG. 3D The axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the optical imaging lens according to Embodiments 1 to 3 of the present application are respectively shown;

[0023] Figure 4A A schematic structural diagram of an optical imaging lens according to Embodiment 4 of the present application is shown;

[0024] Figure 4B A schematic structural diagram of an optical imaging lens according to Embodiment 5 of the present application is shown;

[0025] Figure 4C A schematic structural diagram of an optical imaging lens according to Embodiment 6 of the present application is shown;

[0026] FIG. 5A to FIG. 5D The axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the optical imaging lens according to Embodiment 4 to Embodiment 6 of the present application are respectively shown;

[0027] Fig. 6A A schematic structural diagram of an optical imaging lens according to Embodiment 7 of the present application is shown;

[0028] Figure 6B A schematic structural diagram of an optical imaging lens according to Embodiment 8 of the present application is shown;

[0029] Figure 6C A schematic structural diagram of an optical imaging lens according to Embodiment 9 of the present application is shown;

[0030] FIG. 7A to FIG. 7D The axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the optical imaging lenses according to Embodiments 7 to 9 of the present application are respectively shown;

[0031] Figure 8 A simulation diagram of stray light spots at an imaging surface of an optical imaging lens according to the present application is shown when (EP12+EP23) / (CT2+CT3)=2 and d2s / (SAG22+SAG31)=15;

[0032] Fig. 9 A simulation diagram of stray light spots at an imaging surface of an optical imaging lens according to the present application is shown when (EP12+EP23) / (CT2+CT3)=0.1 and d2s / (SAG22+SAG31)=2;

[0033] Fig.10A simulation diagram of stray light spots at an imaging surface of an optical imaging lens according to the present application is shown when (EP12+EP23) / (CT2+CT3)=0.7 and d2s / (SAG22+SAG31)=6.5;

[0034] Fig.11 A simulation diagram of stray light spots at an imaging surface of an optical imaging lens according to the present application is shown when (EP12+EP23) / (CT2+CT3)=0.8 and d2s / (SAG22+SAG31)=10.2. DETAILED DESCRIPTION

[0035] In order to better understand the present application, a more detailed description will be made of various aspects of the present application with reference to the accompanying drawings. It should be understood that these detailed descriptions are only descriptions of exemplary embodiments of the present application, and are not intended to limit the scope of the present application in any way. Throughout the specification, the same reference numerals refer to the same elements. The expression "and / or" includes any and all combinations of one or more of the associated listed items.

[0036] It should be noted that in this 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, without departing from the teaching of the present application, the first lens discussed below may also be referred to as the second lens or the third lens.

[0037] In the drawings, the thickness, size and shape of the lenses have been slightly exaggerated for ease of explanation. Specifically, the shapes of the spherical or aspherical surfaces shown in the drawings are shown by way of example. That is, the shapes of the spherical or aspherical surfaces are not limited to the shapes of the spherical or aspherical surfaces shown in the drawings. The drawings are only examples and are not drawn strictly to scale.

[0038] In this article, the paraxial region refers to the 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 surface of each lens close to the object is called the object side of the lens, and the surface of each lens close to the imaging plane is called the image side of the lens.

[0039] It should also be understood that the terms "comprises", "including", "having", "includes" and / or "comprising", when used in this specification, indicate the presence of the stated features, elements and / or components, but do not exclude the presence or addition of one or more other features, elements, components and / or combinations thereof. In addition, when expressions such as "at least one of..." appear after a list of listed features, they modify the entire listed features rather than modifying the individual elements in the list. In addition, when describing embodiments of the present application, "may" is used to mean "one or more embodiments of the present application". And, the term "exemplary" is intended to refer to an example or illustration.

[0040] Unless otherwise defined, all terms (including technical terms and scientific terms) used in this article have the same meaning as those commonly understood by ordinary technicians in the field to which this application belongs. It should also be understood that terms (such as terms defined in commonly used dictionaries) should be interpreted as having the same meaning as their meaning in the context of the relevant technology, and will not be interpreted in an idealized or overly formal sense unless explicitly defined in this article.

[0041] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The following embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for those of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. For example, the lens groups, lens barrels and spacers in the various embodiments of the present application can be combined arbitrarily, and are not limited to the lens groups in one embodiment being only combined with the lens barrels, spacers, etc. of the embodiment.

[0042] The present application will be described in detail below with reference to the accompanying drawings and in combination with embodiments. Figure 1 The structure arrangement diagram of an optical imaging lens according to the present application and a schematic diagram of some parameters are shown. It should be understood by those skilled in the art that some parameters of lenses commonly used in the art (such as the center thickness CT1 of the first lens on the optical axis) are not shown in the figure. Figure 1 It is shown in Figure 1 Only some parameters of the lens barrel and the spacer of an optical imaging lens of the present application are shown as examples to facilitate a better understanding of the present invention. Figure 1As shown, EP12 is the distance from the image side surface of the first isolating member to the object side surface of the second isolating member along the optical axis direction, EP23 is the distance from the image side surface of the second isolating member to the object side surface of the third isolating member along the optical axis direction, D0s is the outer diameter of the object side end surface of the lens barrel, d0s is the inner diameter of the object side end surface of the lens barrel, d1s is the inner diameter of the object side surface of the first isolating member, D1s is the outer diameter of the object side surface of the first isolating member, D1m is the outer diameter of the image side surface of the first isolating member, and d2s is the outer diameter of the second isolating member. d2s is the inner diameter of the object side surface of the second isolation member, D2m is the outer diameter of the image side surface of the second isolation member, d3s is the inner diameter of the object side surface of the third isolation member, d3m is the inner diameter of the image side surface of the third isolation member, D3s is the outer diameter of the object side surface of the third isolation member, d4s is the inner diameter of the object side surface of the fourth isolation member, d4m is the inner diameter of the image side surface of the fourth isolation member, D4m is the outer diameter of the image side surface of the fourth isolation member, and D0m is the outer diameter of the image side end surface of the lens barrel.

[0043] The optical imaging lens according to an exemplary embodiment of the present application may include a lens barrel, a lens group and a spacer group disposed in the lens barrel. The lens group may include, from the object side to the image side along the optical axis, a first lens having negative optical power, a second lens having positive optical power, a third lens having positive optical power, a fourth lens having positive optical power or negative optical power, and a fifth lens having positive optical power or negative optical power.

[0044] In an exemplary embodiment, the spacer group of the optical imaging lens may include at least one of a first spacer, a second spacer, a third spacer, and a fourth spacer. The first spacer is placed between the first lens and the second lens and is in at least partial contact with the image side surface of the first lens. The second spacer is placed between the second lens and the third lens and is in at least partial contact with the image side surface of the second lens. The third spacer is placed between the third lens and the fourth lens and is in at least partial contact with the object side surface of the fourth lens. The fourth spacer is placed between the fourth lens and the fifth lens and is in at least partial contact with the image side surface of the fourth lens.

[0045] It should be understood that the present application does not specifically limit the number of spacers, and any number of spacers may be included between any two lenses, and the entire optical imaging lens may also include any number of spacers. Spacers help the optical imaging lens intercept excess refractive and reflective light paths and reduce stray light and ghosting. Adding auxiliary support between the spacer and the lens barrel is helpful to improve the problems of poor assembly stability and low performance yield caused by large step differences between lenses.

[0046] In an exemplary embodiment, the optical imaging lens may further include a diaphragm for restricting light beams to further improve the imaging quality of the optical lens. Exemplarily, the diaphragm may be disposed between the second lens and the third lens. The diaphragm is beneficial to converge the light rays entering the optical lens, reduce the maximum clear aperture of the optical lens, and reduce the assembly sensitivity of the system. However, it should be noted that the position of the diaphragm disclosed herein is only an example and not a limitation; in an alternative embodiment, the diaphragm may also be disposed at other positions according to actual needs.

[0047] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: 0.4 < (EP12 + EP23) / (CT2 + CT3) < 1.0, where EP12 is the distance along the optical axis from the image side of the first spacer to the object side of the second spacer, EP23 is the distance along the optical axis from the image side of the second spacer to the object side of the third spacer, CT2 is the central thickness of the second lens on the optical axis, and CT3 is the central thickness of the third lens on the optical axis.

[0048] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: 4 < d2s / (SAG22 + SAG31) < 11, where d2s is the inner diameter of the object side of the second spacer, SAG22 is the axial distance between the intersection of the image side of the second lens and the optical axis and the vertex of the effective radius of the image side of the second lens, and SAG31 is the axial distance between the intersection of the object side of the third lens and the optical axis and the vertex of the effective radius of the object side of the third lens.

[0049] An optical imaging lens according to an exemplary embodiment of the present application includes: a lens barrel, and a lens group and a spacer group disposed within the lens barrel. Among them, the lens group sequentially includes, from the object side to the image side along the optical axis: a first lens with a negative optical power, a second lens with a positive optical power, a third lens with a positive optical power, a fourth lens with an optical power, and a fifth lens with an optical power. Among them, the object side surface of the second lens is convex, and the image side surface is concave; the object side surface of the third lens is convex, and the image side surface is convex; the spacer group includes: a first spacer disposed between the first lens and the second lens and at least partially contacting the image side surface of the first lens, a second spacer disposed between the second lens and the third lens and at least partially contacting the image side surface of the second lens, and a third spacer disposed between the third lens and the fourth lens and at least partially contacting the object side surface of the fourth lens; when EP12, EP23, CT2, and CT3 satisfy 0.4 < (EP12 + EP23) / (CT2 + CT3) < 1.0, the sum of the distances between the first spacer and the second spacer and between the second spacer and the third spacer is more than two-fifths of the sum of the central thicknesses of the second lens and the third lens, and the object side surface of the second lens is convex, the image side surface is concave, and the object side surface of the third lens is convex, which can avoid too large a thickness difference between the non-light-transmitting part and the light-transmitting part of the second lens and the third lens, thereby facilitating the control of the light path between the second lens and the third lens and avoiding the generation of some stray light. At the same time, by controlling d2s, SAG22, and SAG31 to satisfy 4 < d2s / (SAG22 + SAG31) < 11, the inner diameter of the second spacer can be ensured to be within a reasonable range, effectively improving the problem of reflected stray light between the second lens and the third lens.

[0050] By controlling the conditional expressions 0.4 < (EP12 + EP23) / (CT2 + CT3) < 1.0 and 4 < d2s / (SAG22 + SAG31) < 11 within a reasonable range, the spacer design of the optical imaging lens provided by the present application is more reasonable, and while blocking stray light, the phenomenon of spacer bending can be avoided. The following will further illustrate that the optical imaging lens of the present application has the above technical effects in combination with Figures 8 to 11 , further illustrate that the optical imaging lens of the present application has the above technical effects.

[0051] Figure 8 Shows the simulation diagram of the stray light spot at the imaging surface of the optical imaging lens according to the present application when (EP12 + EP23) / (CT2 + CT3) = 2 and d2s / (SAG22 + SAG31) = 15.

[0052] Fig. 9 Shows the simulation diagram of the stray light spot at the imaging surface of the optical imaging lens according to the present application when (EP12 + EP23) / (CT2 + CT3) = 0.1 and d2s / (SAG22 + SAG31) = 2.

[0053] Fig.10 A simulation diagram of stray light spots at the imaging surface of the optical imaging lens according to the present application is shown when (EP12+EP23) / (CT2+CT3)=0.7 and d2s / (SAG22+SAG31)=6.5.

[0054] Fig.11 A simulation diagram of stray light spots at the imaging surface of the optical imaging lens according to the present application is shown when (EP12+EP23) / (CT2+CT3)=0.8 and d2s / (SAG22+SAG31)=10.2.

[0055] Figure 8 and Fig. 9 (EP12+EP23) / (CT2+CT3) and d2s / (SAG22+SAG31) do not meet the above ranges of this application, Figure 8 and Fig. 9 The stray light spot at the imaging surface in the image is distributed in a wide range and has strong energy. Fig.10 and Fig.11 (EP12+EP23) / (CT2+CT3) and d2s / (SAG22+SAG31) both meet the above ranges of this application, Fig.10 and Fig.11 There are fewer stray light spots on the imaging surface and their energy is weaker.

[0056] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: -0.2<(d1s-d2s) / f2<0.4, wherein d1s is the inner diameter of the object side of the first spacer, d2s is the inner diameter of the object side of the second spacer, and f2 is the effective focal length of the second lens. By satisfying -0.2<(d1s-d2s) / f2<0.4 and adjusting the deflection angle of the light in the edge field of view of the second lens by setting the effective focal length of the second lens, it is possible to ensure that the main light entering the second lens is transmitted along a predetermined path, thereby effectively reducing the sensitivity of the lens. In addition, by controlling the inner diameters of the object sides of the first spacer and the second spacer, the first spacer and the second spacer can effectively block stray light passing through the second lens without affecting the main path of the incident light.

[0057] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: -6 < d0s / R1 - d1s / R2 < -1, where d0s is the inner diameter of the object-side end face of the lens barrel, d1s is the inner diameter of the object-side face of the first spacer, R1 is the curvature radius of the object-side face of the first lens, and R2 is the curvature radius of the image-side face of the first lens. Satisfying -6 < d0s / R1 - d1s / R2 < -1, by controlling the magnitudes of R1 and R2, it is beneficial to control the size of the front end of the lens, ensure that the lens has as small a head as possible, and at the same time, through this formula, the size of the light-blocking portion of the image-side face of the first lens and the curvature radius of the image-side face can be kept within a reasonable range, reducing the problem of difficult lens forming due to too large R2, being beneficial to the forming of the first lens, and reducing the risk of weld lines occurring.

[0058] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: 0.5 < (D0s - D1s) / (DT11 - DT12) < 0.7, where D0s is the outer diameter of the object-side end face of the lens barrel, D1s is the outer diameter of the object-side face of the first spacer, DT11 is the diameter of the light-transmitting portion of the object-side face of the first lens, and DT12 is the diameter of the light-transmitting portion of the image-side face of the first lens. Satisfying 0.5 < (D0s - D1s) / (DT11 - DT12) < 0.7, by controlling this formula within a reasonable range, the thickness of the lens barrel and the light-blocking portion of the first lens can be kept within a reasonable range, which is beneficial to the forming of the lens barrel and the control of the lens barrel size, and is also beneficial to controlling the size of the light-transmitting portion of the first lens within a reasonable range, reducing the forming difficulty of the lens.

[0059] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: -1 < (D1m - d1s) / (f1 - f2) < 0, where D1m is the outer diameter of the image-side face of the first spacer, d1s is the inner diameter of the object-side face of the first spacer, f1 is the effective focal length of the first lens, and f2 is the effective focal length of the second lens. Satisfying -1 < (D1m - d1s) / (f1 - f2) < 0, by controlling this formula within a reasonable range, the focal length of the first lens is made less than the focal length of the second lens, and at the same time, by controlling the inner and outer diameters of the image-side face of the first spacer, the length of the light-blocking portion of the second lens can be controlled to keep this length within a reasonable range, which is beneficial to the stability of the second lens assembly and the forming of the second lens.

[0060] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: 0 < D2s / DT22 - D2m / DT31 < 0.5, where D2s is the outer diameter of the object side surface of the second spacer, D2m is the outer diameter of the image side surface of the second spacer, DT22 is the diameter of the light-transmitting portion of the image side surface of the second lens, and DT31 is the diameter of the light-transmitting portion of the object side surface of the third lens. By satisfying 0 < D2s / DT22 - D2m / DT31 < 0.5 and controlling this formula within a reasonable range, it can be ensured that the second spacer can effectively block stray light and make the second spacer adhere as close as possible to the edge of the chief ray, so as to improve the imaging quality of the optical imaging lens.

[0061] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: -2 < d3s / f3 - d3m / f4 < 2, where d3s is the inner diameter of the object side surface of the third spacer, d3m is the inner diameter of the image side surface of the third spacer, f3 is the effective focal length of the third lens, and f4 is the effective focal length of the fourth lens. By satisfying -2 < d3s / f3 - d3m / f4 < 2 and controlling this formula within a reasonable range, the inner diameter of the third spacer can be kept within a reasonable range, which can effectively block stray light. At the same time, the effective focal lengths of the third lens and the fourth lens are restricted, which is beneficial to controlling the light path in the third lens and the fourth lens and reducing the generation of stray light.

[0062] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: 0 < (D2m - D3s) / CT3 < 3, where D2m is the outer diameter of the image side surface of the second spacer, D3s is the outer diameter of the object side surface of the third spacer, and CT3 is the central thickness of the third lens on the optical axis. By satisfying 0 < (D2m - D3s) / CT3 < 3 and controlling this formula within a reasonable range, the outer diameters of the second spacer and the third spacer can be restricted, and the length of the non-light-transmitting portion of the third lens can be kept within a reasonable range. When the lens is inverted and the aperture position is close to the third lens, the light-transmitting portion of the third lens is the smallest position of the light-transmitting portion inside the lens. Therefore, by controlling the length of the non-light-transmitting portion of the third lens, the lengths of the non-light-transmitting portions of the fourth lens and the fifth lens can be controlled at the same time, so that their non-light-transmitting portions are kept within a reasonable range to meet the requirements of actual production.

[0063] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: -1 < (D4m - d4s) / (f4 - f5) < 0.5, where D4m is the outer diameter of the image side of the fourth spacer, d4s is the inner diameter of the object side of the fourth spacer, f4 is the effective focal length of the fourth lens, and f5 is the effective focal length of the fifth lens. By controlling this formula within a reasonable range, the size of the fourth spacer can be controlled, the bending moment generated by the fourth spacer during the assembly of the optical lens can be reduced, and thus the stability of the optical lens assembly can be improved.

[0064] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: -2 < d4m / (R8 + R9) < 1, where d4m is the inner diameter of the image side of the fourth spacer, R8 is the radius of curvature of the image side of the fourth lens, and R9 is the radius of curvature of the object side of the fifth lens. By controlling this formula within a reasonable range, the inner diameter of the object side of the fourth spacer can be controlled, the effect of effectively blocking stray light can be achieved, and at the same time, the surface shape of the fourth lens can be constrained to control the trend of light rays.

[0065] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: 3 < D4m / DT51 + D0m / DT52 < 5, where D4m is the outer diameter of the image side of the fourth spacer, D0m is the outer diameter of the image-side end face of the lens barrel, DT51 is the diameter of the light-transmitting part of the object side of the fifth lens, and DT52 is the diameter of the light-transmitting part of the image side of the fifth lens. By controlling the ratio of the outer diameter of the fourth spacer to the diameter of the light-transmitting part of the object side of the fifth lens and the ratio of the outer diameter of the object-side end face of the lens barrel to the diameter of the light-transmitting part of the image side of the fifth lens, the ratio of the non-light-transmitting part to the light-transmitting part of the fifth lens is within a reasonable range, which is beneficial to the molding of the fifth lens. At the same time, by controlling this formula within a reasonable range, the overall size of the lens is controlled within a reasonable range, which is beneficial to the window design of the module and meets the requirements of lens miniaturization.

[0066] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: -2 < d3m / R7 + d4s / R8 < 3, where d3m is the inner diameter of the image side of the third spacer, d4s is the inner diameter of the object side of the fourth spacer, R7 is the radius of curvature of the object side of the fourth lens, and R8 is the radius of curvature of the image side of the fourth lens. Satisfying -2 < d3m / R7 + d4s / R8 < 3 and controlling this formula within a reasonable range helps to ensure the performance and imaging quality requirements of the optical lens. The magnitudes of the curvatures of the object side and the image side of the fourth lens determine whether the fourth lens is a concave lens or a convex lens, affecting the structure of the fourth lens; the inner diameter of the image side of the third spacer determines the degree of obstruction of the optical path of the fourth lens by the third spacer; the inner diameter of the object side of the fourth spacer determines the degree of obstruction of the optical path of the fifth lens by the fourth spacer, thereby affecting the imaging quality of the lens.

[0067] In an embodiment of the present application, at least one of the lens surfaces of each lens is an aspherical surface, that is, at least one of the lens surfaces from the object side of the first lens to the image side of the fifth lens is an aspherical surface. The characteristics of an aspherical lens are that the curvature changes continuously from the center of the lens to the periphery of the lens. Different from a spherical lens with a constant curvature from the center of the lens to the periphery, an aspherical lens has better radius-of-curvature characteristics and has the advantages of improving distortion aberration and astigmatism aberration. After using an aspherical lens, it is possible to eliminate as much aberration as possible during imaging, thereby improving the imaging quality. Optionally, the object sides and image sides of all the lenses from the first lens to the fifth lens are aspherical surfaces.

[0068] In an exemplary embodiment, the above optical imaging lens may further include a filter for correcting color deviation and / or a protective glass for protecting the photosensitive element located on the imaging surface.

[0069] The optical imaging lens according to the above embodiment of the present application may employ multiple lenses, such as the five lenses described above. By reasonably distributing the optical power, surface shape of each lens, and the arrangement of each spacer, etc., the span of each gear in the cooperation between the lens and the lens barrel is relatively uniform, enhancing the ability of light convergence and improving the imaging quality of the optical imaging lens. However, those skilled in the art should understand that without departing from the technical solution claimed in the present application, the number of lenses constituting the optical imaging lens can be changed to obtain the various results and advantages described in this specification. For example, although five lenses are described as an example in the embodiment, the optical imaging lens is not limited to including five lenses. If necessary, the optical imaging lens may further include other numbers of lenses.

[0070] The following further describes specific embodiments of the optical imaging lens applicable to the above embodiments with reference to the accompanying drawings. Specifically, refer to FIG. 2A to FIG. 3DDescribe the optical imaging lens according to Embodiment 1 to Embodiment 3 of the present application; refer to 4A to 5D Describe the optical imaging lens according to Embodiment 4 to Embodiment 6 of the present application; refer to 6A to 7D Optical imaging lenses according to Embodiments 7 to 9 of the present application are described.

[0071] Example 1

[0072] Figure 2A FIG. 1 shows a schematic structural diagram of an optical imaging lens 1001 according to Embodiment 1 of the present application. Figure 2A As shown, the optical imaging lens 1001 includes a lens barrel P0, a lens group and a spacer group. The optical imaging lens 1001 also includes a stop STO (not shown) disposed between the second lens and the third lens.

[0073] like Figure 2A As shown, the lens group of the optical imaging lens 1001 includes, from the object side to the image side, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4 and a fifth lens E5. The first lens E1 has an object-side surface S1 and an image-side surface S2. The second lens E2 has an object-side surface S3 and an image-side surface S4. The third lens E3 has an object-side surface S5 and an image-side surface S6. The fourth lens E4 has an object-side surface S7 and an image-side surface S8. The fifth lens E5 has an object-side surface S9 and an image-side surface S10. The optical imaging lens 1001 also includes a filter (not shown) for correcting color deviation, and the filter has an object-side surface S11 and an image-side surface S12. Light from the object passes through each surface S1 to S12 in sequence and is finally imaged on an imaging surface S13 (not shown).

[0074] Table 1 shows a basic parameter table of the lens group of the optical imaging lens 1001 of Example 1, wherein the units of the curvature radius, thickness / distance and effective focal length are all millimeters (mm).

[0075]

[0076] Table 1

[0077] In Example 1, the object side surface and the image side surface of any lens among the first lens E1 to the fifth lens E5 are both aspherical surfaces, and the surface shape x of each aspherical lens can be defined by but not limited to the following aspherical surface formula:

[0078]

[0079] Wherein, x is the distance vector height from the vertex of the aspherical surface when the aspherical surface is at a height of h along the optical axis; c is the paraxial curvature of the aspherical surface, c=1 / R (i.e., the paraxial curvature c is the reciprocal of the curvature radius R in Table 1 above); k is the cone coefficient; Ai is the correction coefficient of the i-th order of the aspherical surface. Tables 2-1 and 2-2 give the high-order coefficients A4, A6, A8, A9, A10, A11, A12, A13, A14, A15, A16, A17, A18, A19, A20, A21, A22, A23, A24, A25, A26, A27, A28, A29, A30, A31, A32, A33, A34, A35, A36, A37, A 10 , A 12 , A 14 , A 16 , A 18 , A 20 , A 22 , A 24 , A 26 , A 28 and A 30 .

[0080]

[0081]

[0082] Table 2-1

[0083] Face number A18 A20 A22 A24 A26 A28 A30 S1 -3.0617E+01 1.4315E+01 -4.8643E+00 1.1660E+00 -1.8664E-01 1.7886E-02 -7.7549E-04 S2 -2.7153E+06 6.3509E+06 -1.0490E+07 1.1956E+07 -8.9428E+06 3.9481E+06 -7.7929E+05 S3 1.3640E+06 -3.7428E+06 7.2305E+06 -9.6411E+06 8.4531E+06 -4.3878E+06 1.0219E+06 S4 -7.7435E+09 4.5144E+10 -1.8920E+11 5.5512E+11 -1.0820E+12 1.2580E+12 -6.6025E+11 S5 3.1919E+07 -1.0436E+08 2.2130E+08 -2.7343E+08 1.4910E+08 0.0000E+00 0.0000E+00 S6 2.1156E+07 -5.9307E+07 1.1552E+08 -1.4777E+08 1.1112E+08 -3.7059E+07 0.0000E+00 S7 4.3598E+06 -9.4490E+06 1.4885E+07 -1.6559E+07 1.2326E+07 -5.5069E+06 1.1168E+06 S8 -1.5289E+06 3.0351E+06 -4.3421E+06 4.3594E+06 -2.9130E+06 1.1625E+06 -2.0945E+05 S9 -1.0298E+06 2.0224E+06 -2.8574E+06 2.8362E+06 -1.8796E+06 7.4748E+05 -1.3500E+05 S10 -4.4577E+04 6.0305E+04 -5.8408E+04 3.9476E+04 -1.7674E+04 4.7089E+03 -5.6497E+02

[0084] Table 2-2

[0085] Table 3 shows the values ​​of the maximum half field of view angle Semi-FOV, entrance pupil diameter EPD and effective focal length f of the optical imaging lens 1001.

[0086] parameter Semi-FOV(°) EPD(mm) f(mm) Numeric 56.470 0.634 0.901

[0087] Table 3

[0088] like Figure 2A As shown, the optical imaging lens 1001 also includes four spacers, namely a first spacer P1, a second spacer P2, a third spacer P3 and a fourth spacer P4. The first spacer P1 is placed on the image side of the first lens and is in at least partial contact with the image side surface of the first lens; the second spacer P2 is placed on the image side of the second lens and is in at least partial contact with the image side surface of the second lens; the third spacer P3 is placed on the image side of the third lens and is in at least partial contact with the object side surface of the fourth lens; the fourth spacer P4 is placed on the image side of the fourth lens and is in at least partial contact with the image side surface of the fourth lens. Table 4 shows a basic parameter table of the spacers and lens barrel of the optical imaging lens 1001, and the units of each parameter in Table 4 are millimeters (mm). The above-mentioned spacers can block the excess light from the edge of the lens from entering, so that the lens and the lens barrel can be better supported, and the structural stability of the optical imaging lens 1001 is enhanced.

[0089] parameter d1s D1s D1m d2s D2s D2m d3s d3m D0m Numeric 1.722 4.855 4.855 0.957 4.644 4.644 1.487 1.542 4.34 parameter D3s d4s d4m D4m d0s D0s EP12 EP23 Numeric 3.559 1.542 1.542 3.642 5.424 5.924 0.424 0.295

[0090] Table 4

[0091] Example 2

[0092] Figure 2B The structure diagram of the optical imaging lens 1002 according to Embodiment 2 of the present application is shown. In this embodiment and the following embodiments, for the sake of brevity, some descriptions similar to Embodiment 1 will be omitted.

[0093] like Figure 2B As shown, the optical imaging lens 1002 includes a lens barrel P0, a lens group, and a spacer group. The optical imaging lens 1002 also includes a stop STO (not shown) disposed between the second lens and the third lens. The lens group of the optical imaging lens 1002 is exactly the same as the lens group of the optical imaging lens 1001 of Example 1. The basic parameters thereof are detailed in Tables 1 to 3, and will not be described in detail.

[0094] like Figure 2B As shown, the optical imaging lens 1002 also includes four spacers, namely a first spacer P1, a second spacer P2, a third spacer P3 and a fourth spacer P4. The first spacer P1 is placed on the image side of the first lens and is in at least partial contact with the image side surface of the first lens; the second spacer P2 is placed on the image side of the second lens and is in at least partial contact with the image side surface of the second lens; the third spacer P3 is placed on the image side of the third lens and is in at least partial contact with the object side surface of the fourth lens; the fourth spacer P4 is placed on the image side of the fourth lens and is in at least partial contact with the image side surface of the fourth lens. Table 5 shows a basic parameter table of the spacers and lens barrel of the optical imaging lens 1002, and the units of each parameter in Table 5 are millimeters (mm). The above-mentioned spacers can block the excess light from the edge of the lens from entering, so that the lens and the lens barrel can be better supported, and the structural stability of the optical imaging lens 1002 is enhanced.

[0095] parameter d1s D1s D1m d2s D2s D2m d3s d3m D0m Numeric 1.740 4.855 4.855 0.950 4.039 4.039 1.393 1.393 4.34 parameter D3s d4s d4m D4m d0s D0s EP12 EP23 Numeric 3.775 1.729 1.729 2.073 5.424 5.924 0.424 0.535

[0096] Table 5

[0097] Example 3

[0098] Figure 2C A schematic structural diagram of an optical imaging lens 1003 according to Embodiment 3 of the present application is shown.

[0099] like Figure 2CAs shown, the optical imaging lens 1003 includes a lens barrel P0, a lens group and a spacer group. The optical imaging lens 1003 also includes a stop STO (not shown) disposed between the second lens and the third lens. The lens group of the optical imaging lens 1003 is exactly the same as the lens group of the optical imaging lens 1001 of Example 1. The basic parameters thereof are detailed in Tables 1 to 3 and will not be described in detail.

[0100] like Figure 2C As shown, the optical imaging lens 1003 also includes four spacers, namely a first spacer P1, a second spacer P2, a third spacer P3 and a fourth spacer P4. The first spacer P1 is placed on the image side of the first lens and is in at least partial contact with the image side surface of the first lens; the second spacer P2 is placed on the image side of the second lens and is in at least partial contact with the image side surface of the second lens; the third spacer P3 is placed on the image side of the third lens and is in at least partial contact with the object side surface of the fourth lens; the fourth spacer P4 is placed on the image side of the fourth lens and is in at least partial contact with the image side surface of the fourth lens. Table 6 shows a basic parameter table of the spacers and lens barrel of the optical imaging lens 1003, and the units of each parameter in Table 6 are millimeters (mm). The above-mentioned spacers can block the excess light from the edge of the lens from entering, so that the lens and the lens barrel can be better supported, and the structural stability of the optical imaging lens 1003 is enhanced.

[0101] parameter d1s D1s D1m d2s D2s D2m d3s d3m D0m Numeric 1.710 4.795 4.795 0.990 4.644 4.644 3.427 1.540 3.99 parameter D3s d4s d4m D4m d0s D0s EP12 EP23 Numeric 3.759 1.709 1.709 3.080 5.364 5.924 0.424 0.010

[0102] Table 6

[0103] Figure 3A The axial chromatic aberration curves of the optical imaging lenses of Examples 1 to 3 are shown, which indicate the deviation of light rays of different wavelengths from the focal point behind the lens. Figure 3B Astigmatism curves of the optical imaging lenses of Examples 1 to 3 are shown, which represent meridional image curvature and sagittal image curvature. Figure 3C The distortion curves of the optical imaging lenses of Examples 1 to 3 are shown, which represent the distortion values ​​corresponding to different field angles. Figure 3D The magnification chromatic aberration curves of the optical imaging lenses of Examples 1 to 3 are shown, which represent the deviations of different image heights on the imaging surface after the light passes through the lens. FIG. 3A to FIG. 3D It can be seen that the optical imaging lenses provided in Examples 1 to 3 can achieve good imaging quality.

[0104] Example 4

[0105] Figure 4A FIG. 2 shows a schematic structural diagram of an optical imaging lens 2001 according to Embodiment 4 of the present application. Figure 4AAs shown, the optical imaging lens 2001 includes a lens barrel P0, a lens group and a spacer group. The optical imaging lens 2001 also includes a stop STO (not shown) disposed between the second lens and the third lens.

[0106] like Figure 4A As shown, the lens group of the optical imaging lens 2001 includes, from the object side to the image side, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4 and a fifth lens E5. The first lens E1 has an object side surface S1 and an image side surface S2. The second lens E2 has an object side surface S3 and an image side surface S4. The third lens E3 has an object side surface S5 and an image side surface S6. The fourth lens E4 has an object side surface S7 and an image side surface S8. The fifth lens E5 has an object side surface S9 and an image side surface S10. The optical imaging lens 1001 also includes a filter (not shown) for correcting color deviation, and the filter has an object side surface S11 and an image side surface S12. Light from the object passes through each surface S1 to S12 in sequence and is finally imaged on an imaging surface S13 (not shown).

[0107] Table 7 shows the basic parameters of the lens group of the optical imaging lens 2001 of Example 4, wherein the units of the radius of curvature, thickness / distance and effective focal length are all in millimeters (mm). Tables 8-1 and 8-2 show the high-order coefficients of each aspherical mirror surface that can be used in Example 4, wherein the surface type of each aspherical surface can be defined by the formula (1) given in the above-mentioned Example 1.

[0108]

[0109] Table 7

[0110] Face number A4 A6 A8 A10 A12 A14 A16 S1 -3.2106E-01 8.1416E-01 -1.8624E+00 3.2425E+00 -4.0674E+00 3.6852E+00 -2.4385E+00 S2 -6.0522E-01 2.0496E+00 -4.7437E+00 -3.7921E+01 3.9965E+02 -1.7675E+03 4.7383E+03 S3 7.2275E-01 -4.4234E+01 1.0293E+03 -1.3134E+04 1.0416E+05 -5.4985E+05 2.0106E+06 S4 3.6745E-01 -9.4013E+00 3.8451E+02 -9.9882E+03 1.7747E+05 -2.2345E+06 2.0405E+07 S5 1.9427E-02 9.6184E-02 -1.2069E+01 6.1999E+02 -1.4280E+04 1.9109E+05 -1.6589E+06 S6 -3.4316E+00 6.9065E+01 -7.9269E+02 5.7334E+03 -2.4945E+04 4.1227E+04 2.2099E+05 S7 -5.0396E+00 9.0462E+01 -1.1850E+03 1.1487E+04 -8.3359E+04 4.5376E+05 -1.8508E+06 S8 -3.1065E+00 2.0880E+01 -7.1105E+01 -3.8044E+02 6.9963E+03 -4.9257E+04 2.1721E+05 S9 -1.4971E+00 6.0496E+00 -2.2723E+01 6.4268E+01 -1.2391E+02 1.5953E+02 -1.3493E+02 S10 7.3675E-02 -7.0542E-01 3.6361E+00 -1.0853E+01 2.1243E+01 -2.5730E+01 1.9195E+01

[0111] Table 8-1

[0112]

[0113]

[0114] Table 8-2

[0115] Table 9 shows the values ​​of the maximum half field of view Semi-FOV, entrance pupil diameter EPD and effective focal length f of the optical imaging lens 2001.

[0116] parameter Semi-FOV(°) EPD(mm) f(mm) Numeric 54.792 0.619 0.8847

[0117] Table 9

[0118] like Figure 4AAs shown, the optical imaging lens 2001 also includes four spacers, namely a first spacer P1, a second spacer P2, a third spacer P3 and a fourth spacer P4. The first spacer P1 is placed on the image side of the first lens and is in at least partial contact with the image side surface of the first lens; the second spacer P2 is placed on the image side of the second lens and is in at least partial contact with the image side surface of the second lens; the third spacer P3 is placed on the image side of the third lens and is in at least partial contact with the object side surface of the fourth lens; the fourth spacer P4 is placed on the image side of the fourth lens and is in at least partial contact with the image side surface of the fourth lens. Table 10 shows a basic parameter table of the spacers and lens barrel of the optical imaging lens 2001, and the units of each parameter in Table 10 are millimeters (mm). The above-mentioned spacers can block the entry of excess external light, so that the lens and the lens barrel can be better supported, and the structural stability of the optical imaging lens 2001 is enhanced.

[0119] parameter d1s D1s D1m d2s D2s D2m d3s d3m D0m Numeric 1.976 5.383 5.383 1.075 4.019 4.019 1.550 1.550 4.71 parameter D3s d4s d4m D4m d0s D0s EP12 EP23 Numeric 3.819 1.923 1.923 3.619 6.060 6.400 0.710 0.582

[0120] Table 10

[0121] Example 5

[0122] Figure 4B A schematic structural diagram of an optical imaging lens 2002 according to Embodiment 5 of the present application is shown.

[0123] like Figure 4B As shown, the optical imaging lens 2002 includes a lens barrel P0, a lens group and a spacer group. The optical imaging lens 2002 also includes a stop STO (not shown) disposed between the second lens and the third lens. The lens group of the optical imaging lens 2002 is exactly the same as the lens group of the optical imaging lens 2001 of Example 1. The basic parameters thereof are detailed in Tables 7 to 9 and will not be described in detail.

[0124] like Figure 4B As shown, the optical imaging lens 2002 also includes four spacers, namely a first spacer P1, a second spacer P2, a third spacer P3 and a fourth spacer P4. The first spacer P1 is placed on the image side of the first lens and is in at least partial contact with the image side surface of the first lens; the second spacer P2 is placed on the image side of the second lens and is in at least partial contact with the image side surface of the second lens; the third spacer P3 is placed on the image side of the third lens and is in at least partial contact with the object side surface of the fourth lens; the fourth spacer P4 is placed on the image side of the fourth lens and is in at least partial contact with the image side surface of the fourth lens. Table 11 shows a basic parameter table of the spacers and lens barrel of the optical imaging lens 2002, and the units of each parameter in Table 11 are millimeters (mm). The above-mentioned spacers can block the excess light from the edge of the lens from entering, so that the lens and the lens barrel can be better supported, and the structural stability of the optical imaging lens 2002 is enhanced.

[0125] parameter d1s D1s D1m d2s D2s D2m d3s d3m D0m Numeric 1.996 5.383 5.383 1.060 4.019 4.019 1.562 1.829 4.71 parameter D3s d4s d4m D4m d0s D0s EP12 EP23 Numeric 3.404 1.562 1.829 3.644 5.941 6.400 0.710 0.349

[0126] Table 11

[0127] Example 6

[0128] Figure 4C A schematic structural diagram of an optical imaging lens 2003 according to Embodiment 6 of the present application is shown.

[0129] like Figure 4C As shown, the optical imaging lens 2003 includes a lens barrel P0, a lens group and a spacer group. The optical imaging lens 2003 also includes a stop STO (not shown) disposed between the second lens and the third lens. The lens group of the optical imaging lens 2003 is exactly the same as the lens group of the optical imaging lens 2001 of Example 1. The basic parameters thereof are detailed in Tables 7 to 9 and will not be described in detail.

[0130] like Figure 4C As shown, the optical imaging lens 2003 also includes four spacers, namely a first spacer P1, a second spacer P2, a third spacer P3 and a fourth spacer P4. The first spacer P1 is placed on the image side of the first lens and is in at least partial contact with the image side surface of the first lens; the second spacer P2 is placed on the image side of the second lens and is in at least partial contact with the image side surface of the second lens; the third spacer P3 is placed on the image side of the third lens and is in at least partial contact with the object side surface of the fourth lens; the fourth spacer P4 is placed on the image side of the fourth lens and is in at least partial contact with the image side surface of the fourth lens. Table 12 shows a basic parameter table of the spacers and lens barrel of the optical imaging lens 2003, and the units of each parameter in Table 12 are all millimeters (mm). The above-mentioned spacers can block the excess light from the edge of the lens from entering, so that the lens and the lens barrel can be better supported, and the structural stability of the optical imaging lens 2003 is enhanced.

[0131] parameter d1s D1s D1m d2s D2s D2m d3s d3m D0m Numeric 1.998 5.383 5.383 2.454 3.600 3.817 1.527 1.527 4.71 parameter D3s d4s d4m D4m d0s D0s EP12 EP23 Numeric 3.719 1.942 2.127 3.415 6.060 6.400 0.510 0.430

[0132] Table 12

[0133] Figure 5A The axial chromatic aberration curves of the optical imaging lenses of Examples 4 to 6 are shown, which indicate the deviation of light rays of different wavelengths from the focal point behind the lens. Figure 5B Astigmatism curves of the optical imaging lenses of Examples 4 to 6 are shown, which represent meridional image curvature and sagittal image curvature. Figure 5C The distortion curves of the optical imaging lenses of Examples 4 to 6 are shown, which represent the distortion values ​​corresponding to different field angles. Figure 5D The magnification chromatic aberration curves of the optical imaging lenses of Examples 4 to 6 are shown, which represent the deviations of different image heights on the imaging surface after the light passes through the lens. FIG. 5A to FIG. 5DIt can be seen that the optical imaging lenses provided in Examples 4 to 6 can achieve good imaging quality.

[0134] Example 7

[0135] Fig. 6A FIG. 3 shows a schematic structural diagram of an optical imaging lens 3001 according to Embodiment 7 of the present application. Fig. 6A As shown, the optical imaging lens 3001 includes a lens barrel P0, a lens group and a spacer group. The optical imaging lens 3001 also includes a stop STO (not shown) disposed between the second lens and the third lens.

[0136] like Fig. 6A As shown, the lens group of the optical imaging lens 3001 includes, from the object side to the image side, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4 and a fifth lens E5. The first lens E1 has an object side surface S1 and an image side surface S2. The second lens E2 has an object side surface S3 and an image side surface S4. The third lens E3 has an object side surface S5 and an image side surface S6. The fourth lens E4 has an object side surface S7 and an image side surface S8. The fifth lens E5 has an object side surface S9 and an image side surface S10. The optical imaging lens 1001 also includes a filter (not shown) for correcting color deviation, and the filter has an object side surface S11 and an image side surface S12. Light from the object passes through each surface S1 to S12 in sequence and is finally imaged on an imaging surface S13 (not shown).

[0137] Table 13 shows the basic parameter table of the lens group of the optical imaging lens 3001 of Example 7, wherein the units of the radius of curvature, thickness / distance and effective focal length are all in millimeters (mm). Tables 14-1 and 14-2 show the high-order coefficients of each aspherical mirror surface that can be used in Example 7, wherein the surface type of each aspherical surface can be defined by the formula (1) given in the above Example 1.

[0138]

[0139]

[0140] Table 13

[0141] Face number A4 A6 A8 A10 A12 A14 A16 S1 1.9190E+00 -5.9769E+00 1.5870E+01 -3.2454E+01 4.9736E+01 -5.6810E+01 4.8358E+01 S2 2.3497E+00 -1.0956E+01 1.6228E+02 -2.5233E+03 2.5923E+04 -1.7630E+05 8.2454E+05 S3 6.1326E-01 -4.8954E+00 1.3690E+01 3.9386E+02 -6.9897E+03 6.1680E+04 -3.4980E+05 S4 2.2918E+00 -1.6138E+02 8.1413E+03 -2.6108E+05 5.6936E+06 -8.7429E+07 9.6531E+08 S5 -1.8759E-01 1.1286E+01 -3.7551E+02 7.5707E+03 -1.0282E+05 9.8289E+05 -6.6783E+06 S6 -6.0743E+00 8.6170E+01 -1.2188E+03 1.4732E+04 -1.4045E+05 1.0125E+06 -5.4130E+06 S7 -5.9959E+00 8.1221E+01 -1.0025E+03 9.6759E+03 -6.9905E+04 3.7408E+05 -1.4834E+06 S8 1.4347E+00 -2.0713E+01 3.4550E+02 -3.8233E+03 2.8553E+04 -1.4939E+05 5.6071E+05 S9 2.4368E+00 -1.2894E+01 2.0631E+02 -2.4482E+03 1.8987E+04 -1.0098E+05 3.7997E+05 S10 9.8420E-01 -4.0428E+00 5.7484E+01 -4.7389E+02 2.5107E+03 -9.1727E+03 2.3816E+04

[0142] Table 14-1

[0143] Face number A18 A20 A22 A24 A26 A28 A30 S1 -3.0617E+01 1.4315E+01 -4.8643E+00 1.1660E+00 -1.8664E-01 1.7886E-02 -7.7549E-04 S2 -2.7153E+06 6.3509E+06 -1.0490E+07 1.1956E+07 -8.9428E+06 3.9481E+06 -7.7929E+05 S3 1.3640E+06 -3.7426E+06 7.2301E+06 -9.6405E+06 8.4526E+06 -4.3875E+06 1.0218E+06 S4 -7.7431E+09 4.5141E+10 -1.8919E+11 5.5508E+11 -1.0819E+12 1.2579E+12 -6.6018E+11 S5 3.1919E+07 -1.0436E+08 2.2130E+08 -2.7343E+08 1.4910E+08 0.0000E+00 0.0000E+00 S6 2.1156E+07 -5.9307E+07 1.1552E+08 -1.4777E+08 1.1112E+08 -3.7058E+07 0.0000E+00 S7 4.3598E+06 -9.4490E+06 1.4885E+07 -1.6559E+07 1.2326E+07 -5.5069E+06 1.1168E+06 S8 -1.5289E+06 3.0351E+06 -4.3421E+06 4.3594E+06 -2.9130E+06 1.1625E+06 -2.0945E+05 S9 -1.0298E+06 2.0224E+06 -2.8574E+06 2.8362E+06 -1.8796E+06 7.4748E+05 -1.3500E+05 S10 -4.4577E+04 6.0305E+04 -5.8408E+04 3.9476E+04 -1.7674E+04 4.7089E+03 -5.6497E+02

[0144] Table 14-2

[0145] Table 15 shows the values ​​of the maximum half field of view Semi-FOV, entrance pupil diameter EPD and effective focal length f of the optical imaging lens 3001.

[0146] parameter Semi-FOV(°) EPD(mm) f(mm) Numeric 55.676 0.652 0.925

[0147] Table 15

[0148] like Fig. 6A As shown, the optical imaging lens 3001 also includes four spacers, namely a first spacer P1, a second spacer P2, a third spacer P3 and a fourth spacer P4. The first spacer P1 is placed on the image side of the first lens and is in at least partial contact with the image side surface of the first lens; the second spacer P2 is placed on the image side of the second lens and is in at least partial contact with the image side surface of the second lens; the third spacer P3 is placed on the image side of the third lens and is in at least partial contact with the object side surface of the fourth lens; the fourth spacer P4 is placed on the image side of the fourth lens and is in at least partial contact with the image side surface of the fourth lens. Table 16 shows a basic parameter table of the spacers and lens barrel of the optical imaging lens 3001, and the units of each parameter in Table 16 are millimeters (mm). The above-mentioned spacers can block the entry of excess external light, so that the lens and the lens barrel can be better supported, and the structural stability of the optical imaging lens 3001 is enhanced.

[0149] parameter d1s D1s D1m d2s D2s D2m d3s d3m D0m Numeric 1.618 4.261 4.261 0.980 4.061 4.061 1.240 1.620 3.78 parameter D3s d4s d4m D4m d0s D0s EP12 EP23 Numeric 3.317 1.680 1.680 3.461 4.926 5.266 0.452 0.345

[0150] Table 16

[0151] Example 8

[0152] Figure 6B A schematic structural diagram of an optical imaging lens 3002 according to Embodiment 8 of the present application is shown.

[0153] like Figure 6B As shown, the optical imaging lens 3002 includes a lens barrel P0, a lens group, and a spacer group. The optical imaging lens 3002 also includes an aperture STO (not shown) disposed between the second lens and the third lens. The lens group of the optical imaging lens 3002 is exactly the same as the lens group of the optical imaging lens 3001 of Example 1. The basic parameters thereof are detailed in Tables 13 to 15, and will not be described in detail.

[0154] like Figure 6BAs shown, the optical imaging lens 3002 also includes four spacers, namely a first spacer P1, a second spacer P2, a third spacer P3 and a fourth spacer P4. The first spacer P1 is placed on the image side of the first lens and is in at least partial contact with the image side surface of the first lens; the second spacer P2 is placed on the image side of the second lens and is in at least partial contact with the image side surface of the second lens; the third spacer P3 is placed on the image side of the third lens and is in at least partial contact with the object side surface of the fourth lens; the fourth spacer P4 is placed on the image side of the fourth lens and is in at least partial contact with the image side surface of the fourth lens. Table 17 shows a basic parameter table of the spacers and lens barrel of the optical imaging lens 3002, and the units of each parameter in Table 17 are millimeters (mm). The above-mentioned spacers can block the excess light from the edge of the lens from entering, so that the lens and the lens barrel can be better supported, and the structural stability of the optical imaging lens 3002 is enhanced.

[0155] parameter d1s D1s D1m d2s D2s D2m d3s d3m D0m Numeric 1.610 4.261 4.261 1.000 3.661 3.661 1.419 1.618 4.07 parameter D3s d4s d4m D4m d0s D0s EP12 EP23 Numeric 3.117 1.677 1.677 2.238 4.926 5.266 0.452 0.345

[0156] Table 17

[0157] Example 9

[0158] Figure 6C A schematic structural diagram of an optical imaging lens 3003 according to Embodiment 9 of the present application is shown.

[0159] like Figure 6C As shown, the optical imaging lens 3003 includes a lens barrel P0, a lens group and a spacer group. The optical imaging lens 3003 also includes a stop STO (not shown) disposed between the second lens and the third lens. The lens group of the optical imaging lens 3003 is exactly the same as the lens group of the optical imaging lens 3001 of Example 1. The basic parameters thereof are detailed in Tables 13 to 15 and will not be described in detail.

[0160] like Figure 6C As shown, the optical imaging lens 3003 also includes four spacers, namely a first spacer P1, a second spacer P2, a third spacer P3 and a fourth spacer P4. The first spacer P1 is placed on the image side of the first lens and is in at least partial contact with the image side surface of the first lens; the second spacer P2 is placed on the image side of the second lens and is in at least partial contact with the image side surface of the second lens; the third spacer P3 is placed on the image side of the third lens and is in at least partial contact with the object side surface of the fourth lens; the fourth spacer P4 is placed on the image side of the fourth lens and is in at least partial contact with the image side surface of the fourth lens. Table 18 shows a basic parameter table of the spacers and lens barrel of the optical imaging lens 3003, and the units of each parameter in Table 18 are millimeters (mm). The above-mentioned spacers can block the excess light from the edge of the lens from entering, so that the lens and the lens barrel can be better supported, and the structural stability of the optical imaging lens 3003 is enhanced.

[0161] parameter d1s D1s D1m d2s D2s D2m d3s d3m D0m Numeric 1.620 4.261 4.261 0.950 3.589 3.589 1.268 1.613 4.05 parameter D3s d4s d4m D4m d0s D0s EP12 EP23 Numeric 3.008 1.691 1.691 3.261 5.084 5.444 0.452 0.345

[0162] Table 18

[0163] Fig. 7A The axial chromatic aberration curves of the optical imaging lenses of Examples 7 to 9 are shown, which indicate the deviation of light rays of different wavelengths from the focal point behind the lens. Figure 7B Astigmatism curves of the optical imaging lenses of Examples 7 to 9 are shown, which represent meridional image curvature and sagittal image curvature. Figure 7C The distortion curves of the optical imaging lenses of Examples 7 to 9 are shown, which represent the distortion values ​​corresponding to different field angles. Fig.7D The magnification chromatic aberration curves of the optical imaging lenses of Examples 7 to 9 are shown, which represent the deviations of different image heights on the imaging surface after the light passes through the lens. FIG. 7A to FIG. 7D It can be seen that the optical imaging lenses provided in Examples 7 to 9 can achieve good imaging quality.

[0164] In summary, the optical imaging lenses of Examples 1 to 9 satisfy the relationship shown in Table 19.

[0165] Conditional / Example 1 2 3 4 5 6 7 8 9 d2s / (SAG22+SAG31) 6.4863 6.4369 6.7079 4.4676 4.4053 10.1998 6.6395 6.7757 6.4362 (EP12+EP23) / (CT2+CT3) 0.7373 0.9828 0.4449 0.8702 0.7133 0.6330 0.8174 0.8174 0.8174 <h2 style=";text-align:left;direction:ltr">(d1s-d2s) / f2 0.1450 0.1498 0.1366 0.3836 0.3985 -0.1941 0.1210 0.1157 0.1271 <h2 style=";text-align:left;direction:ltr"> d0s / R1-d1s / R2 -5.9894 -5.9917 -5.9241 -2.2236 -2.3022 -2.2694 -5.4462 -5.4453 -5.6143 <h2 style=";text-align:left;direction:ltr"> (D0s-D1s) / (DT11-DT12) 0.5880 0.5880 0.6210 0.5534 0.5534 0.5534 0.5813 0.5813 0.6841 <h2 style=";text-align:left;direction:ltr"> (D1m-d1s) / (f1-f2) -0.4617 -0.4590 -0.4546 -0.9824 -0.9766 -0.9760 -0.3880 -0.3891 -0.3876 <h2 style=";text-align:left;direction:ltr"> D2s / DT22-D2m / DT31 0.3391 0.2949 0.3391 0.3307 0.3307 0.1222 0.2965 0.2673 0.2620 <h2 style=";text-align:left;direction:ltr"> d3s / f3-d3m / f4 -1.4993 -1.3455 -1.1310 1.6540 1.7729 1.6292 -1.6096 -1.5736 -1.5961 <h2 style=";text-align:left;direction:ltr"> (D2m-D3s) / CT3 2.3473 0.5707 1.9150 0.2953 0.9085 0.1448 1.6093 1.1772 1.2546 <h2 style=";text-align:left;direction:ltr"> (D4m-d4s) / (f4-f5) 0.3466 0.0567 0.2261 -0.4311 -0.5291 -0.3745 0.2933 0.0924 0.2585 <h2 style=";text-align:left;direction:ltr"> d4m / (R8+R9) -1.4686 -1.6476 -1.6285 0.8481 0.8067 0.9381 -1.6005 -1.5974 -1.6109 <h2 style=";text-align:left;direction:ltr"> D4m / DT51+D0m / DT52 4.3561 3.4084 3.8446 4.0486 4.0605 3.9506 3.9666 3.3738 3.9805 <h2 style=";text-align:left;direction:ltr"> d3m / R7+d4s / R8 -0.6736 -1.1227 -0.9314 2.2069 1.9617 2.2170 -0.7995 -0.7967 -0.8240

[0166] Table 19

[0167] The present application also provides an imaging device, whose electronic photosensitive element can be a photosensitive coupled device (CCD) or a complementary metal oxide semiconductor element (CMOS). The imaging device can be an independent imaging device such as a digital camera, or an imaging module integrated in a mobile electronic device such as a mobile phone. The imaging device is equipped with the optical imaging lens described above.

[0168] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the above features are replaced with (but not limited to) technical features with similar functions disclosed in the present application.

Claims

1. An optical imaging lens, characterized in that, it comprises: a lens barrel, and a lens group and a spacer group disposed within the lens barrel, wherein, the lens group sequentially includes, from the object side to the image side along the optical axis: a first lens with a negative optical power; a second lens with a positive optical power, having a convex object side surface and a concave image side surface; a third lens with a positive optical power, having a convex object side surface and a convex image side surface; a fourth lens with an optical power; and a fifth lens with an optical power; the spacer group includes: a first spacer disposed between the first lens and the second lens and at least partially contacting the image side surface of the first lens; a second spacer disposed between the second lens and the third lens and at least partially contacting the image side surface of the second lens; and a third spacer disposed between the third lens and the fourth lens and at least partially contacting the object side surface of the fourth lens; the optical imaging lens satisfies: 0.4 < (EP12 + EP23) / (CT2 + CT3) < 1.0 and 4 < d2s / (SAG22 + SAG31) < 11, where EP12 is the distance along the optical axis from the image side surface of the first spacer to the object side surface of the second spacer, EP23 is the distance along the optical axis from the image side surface of the second spacer to the object side surface of the third spacer, CT2 is the central thickness of the second lens on the optical axis, CT3 is the central thickness of the third lens on the optical axis, d2s is the inner diameter of the object side surface of the second spacer, SAG22 is the axial distance from the intersection of the image side surface of the second lens and the optical axis to the vertex of the effective radius of the image side surface of the second lens, and SAG31 is the axial distance from the intersection of the object side surface of the third lens and the optical axis to the vertex of the effective radius of the object side surface of the third lens.

2. The optical imaging lens according to claim 1, characterized in that, the optical imaging lens satisfies: -0.2 < (d1s - d2s) / f2 < 0.4, where d1s is the inner diameter of the object side surface of the first spacer, d2s is the inner diameter of the object side surface of the second spacer, and f2 is the effective focal length of the second lens.

3. The optical imaging lens according to claim 1, characterized in that, the optical imaging lens satisfies: -6 < d0s / R1 - d1s / R2 < -1, where d0s is the inner diameter of the object side end face of the lens barrel, d1s is the inner diameter of the object side surface of the first spacer, R1 is the curvature radius of the object side surface of the first lens, and R2 is the curvature radius of the image side surface of the first lens.

4. The optical imaging lens according to claim 1, characterized in that, the optical imaging lens satisfies: 0.5 < (D0s - D1s) / (DT11 - DT12) < 0.7, where D0s is the outer diameter of the object side end face of the lens barrel, D1s is the outer diameter of the object side surface of the first spacer, DT11 is the diameter of the light-transmitting part of the object side surface of the first lens, and DT12 is the diameter of the light-transmitting part of the image side surface of the first lens.

5. The optical imaging lens according to claim 1, characterized in that, the optical imaging lens satisfies: -1 < (D1m - d1s) / (f1 - f2) < 0, where D1m is the outer diameter of the image side of the first spacer, d1s is the inner diameter of the object side of the first spacer, f1 is the effective focal length of the first lens, and f2 is the effective focal length of the second lens.

6. The optical imaging lens according to claim 1, characterized in that, the optical imaging lens satisfies: 0 < D2s / DT22 - D2m / DT31 < 0.5, where D2s is the outer diameter of the object side of the second spacer, D2m is the outer diameter of the image side of the second spacer, DT22 is the diameter of the light-transmitting part of the image side of the second lens, and DT31 is the diameter of the light-transmitting part of the object side of the third lens.

7. The optical imaging lens according to claim 1, characterized in that, the optical imaging lens satisfies: -2 < d3s / f3 - d3m / f4 < 2, where d3s is the inner diameter of the object side of the third spacer, d3m is the inner diameter of the image side of the third spacer, f3 is the effective focal length of the third lens, and f4 is the effective focal length of the fourth lens.

8. The optical imaging lens according to claim 1, characterized in that, the optical imaging lens satisfies: 0 < (D2m - D3s) / CT3 < 3, where D2m is the outer diameter of the image side of the second spacer, D3s is the inner diameter of the object side of the third spacer, and CT3 is the central thickness of the third lens on the optical axis.

9. The optical imaging lens according to any one of claims 1-8, characterized in that, the spacer group further includes: a fourth spacer, disposed between the fourth lens and the fifth lens and at least partially in contact with the image side of the fourth lens; the optical imaging lens satisfies: -1 < (D4m - d4s) / (f4 - f5) < 0.5, where D4m is the outer diameter of the image side of the fourth spacer, d4s is the inner diameter of the object side of the fourth spacer, f4 is the effective focal length of the fourth lens, and f5 is the effective focal length of the fifth lens.

10. The optical imaging lens according to any one of claims 1-8, characterized in that, the spacer group further includes: a fourth spacer, disposed between the fourth lens and the fifth lens and at least partially in contact with the image side of the fourth lens; the optical imaging lens satisfies: -2 < d4m / (R8 + R9) < 1, where d4m is the inner diameter of the image side of the fourth spacer, R8 is the radius of curvature of the image side of the fourth lens, and R9 is the radius of curvature of the object side of the fifth lens.

11. The optical imaging lens according to any one of claims 1-8, characterized in that, the spacer group further includes: a fourth spacer, disposed between the fourth lens and the fifth lens and at least partially in contact with the image side of the fourth lens; The optical imaging lens satisfies: 3 < D4m / DT51 + D0m / DT52 < 5, where D4m is the outer diameter of the image side of the fourth spacer, D0m is the outer diameter of the image-side end face of the lens barrel, DT51 is the diameter of the light-transmitting portion of the object side of the fifth lens, and DT52 is the diameter of the light-transmitting portion of the image side of the fifth lens.

12. The optical imaging lens according to any one of claims 1-8, characterized in that the spacer group further includes: a fourth spacer disposed between the fourth lens and the fifth lens and at least partially contacting the image side of the fourth lens; the optical imaging lens satisfies: -2 < d3m / R7 + d4s / R8 < 3, where d3m is the inner diameter of the image side of the third spacer, d4s is the inner diameter of the object side of the fourth spacer, R7 is the curvature radius of the object side of the fourth lens, and R8 is the curvature radius of the image side of the fourth lens.

Images