Optical imaging lens

Abstract

This application discloses an optical imaging lens, comprising: an imaging lens group consisting of a first lens, a second lens, a third lens, a fourth lens, and a fifth lens arranged sequentially along the optical axis from the object side to the image side; the imaging lens group includes three lenses with positive optical power among the lenses with a refractive index less than 1.65; the fifth lens in the imaging lens group has the smallest absolute value of effective focal length; multiple isolation members including a second isolation member abutting the image side of the second lens and a third isolation member abutting the image side of the third lens; and a lens barrel for accommodating the imaging lens group and the multiple isolation members; the effective focal length f3 of the third lens, the effective focal length f2 of the second lens, and the distance EP23 between the second and third isolation members along the optical axis satisfying: 6.5 < |f3-|f2|| / EP23 < 30.5; and the outer diameter D0m of the image side end of the lens barrel and the radius of curvature R10 of the image side side of the fifth lens satisfying: 0 < |D0m / R10| < 6.0.

Description

[0001] Divisional application statement

[0002] This application is a divisional application of Chinese invention patent application filed on November 4, 2022, entitled "Optical Imaging Lens" and with application number 202211375124.9. Technical Field

[0003] This application relates to the field of optical components, and more specifically, to an optical imaging lens. Background Technology

[0004] In recent years, the mobile phone industry has been developing towards lighter, higher-resolution, and more multifunctional designs. The constraints on the camera lenses mounted on mobile phones have become increasingly stringent, especially regarding stray light, weight, optical parameters, and reliability. If these parameters are not kept within reasonable ranges, mobile phone lenses equipped with conventional optical elements are prone to stray light, out-of-tolerance optical parameters, and poor product reliability, thereby affecting product yield. Therefore, how to improve these issues has become one of the key issues in the development of the lens industry.

[0005] Five-element lenses, especially those with small heads and ultra-thin designs, are prone to stray light due to the high refractive index of the elements. Furthermore, there are limitations in the manufacturing process for these elements, and assembly stability issues caused by large differences in lens size are common. Therefore, to meet customer needs and ensure good optical imaging quality, designing a five-element optical imaging lens that optimizes the optical power, surface shape, and size of the lens elements, thereby addressing the problems of poor assembly stability and stray light, is of practical significance. Summary of the Invention

[0006] The present application provides an optical imaging lens, which includes: an imaging lens group composed of a first lens, a second lens, a third lens, a fourth lens, and a fifth lens arranged in sequence from the object side to the image side along the optical axis. Among them, three lenses with positive optical power are included in the lenses with a refractive index less than 1.65 in the imaging lens group, and the absolute value of the effective focal length of the fifth lens in the imaging lens group is the smallest; a plurality of spacers, including a second spacer placed between the second lens and the third lens and abutting against the image side surface of the second lens, and a third spacer placed between the third lens and the fourth lens and abutting against the image side surface of the third lens; and a lens barrel for accommodating the imaging lens group and the plurality of spacers. The maximum height L of the lens barrel in the optical axis direction, the effective focal length f of the optical imaging lens, and the maximum semi-field angle Semi-FOV of the optical imaging lens satisfy: 0.8 < L / (f × tan(Semi-FOV)) < 1.7; the radius of curvature R4 of the image side surface of the second lens, the radius of curvature R6 of the image side surface of the third lens, the inner diameter d3s of the object side surface of the third spacer, and the inner diameter d2m of the image side surface of the second spacer satisfy: 3.5 < (R4 - R6) / (d3s - d2m) < 26.5.

[0007] On the other hand, the present application also provides an optical imaging lens, which includes: an imaging lens group composed of a first lens, a second lens, a third lens, a fourth lens, and a fifth lens arranged in sequence from the object side to the image side along the optical axis. Among them, three lenses with positive optical power are included in the lenses with a refractive index less than 1.65 in the imaging lens group, and the absolute value of the effective focal length of the fifth lens in the imaging lens group is the smallest; a plurality of spacers, including a second spacer placed between the second lens and the third lens and abutting against the image side surface of the second lens, and a third spacer placed between the third lens and the fourth lens and abutting against the image side surface of the third lens; and a lens barrel for accommodating the imaging lens group and the plurality of spacers. Three lenses with positive optical power are included in the lenses with a refractive index less than 1.65 in the imaging lens group, and the absolute value of the effective focal length of the fifth lens in the imaging lens group is the smallest; the plurality of spacers include a second spacer abutting against the image side surface of the second lens and a third spacer abutting against the image side surface of the third lens; and a lens barrel for accommodating the imaging lens group and the plurality of spacers. The effective focal length f3 of the third lens, the effective focal length f2 of the second lens, and the interval EP23 of the second spacer and the third spacer in the optical axis direction satisfy: 6.5 < |f3 - |f2|| / EP23 < 30.5; and the outer diameter D0m of the image side end of the lens barrel and the radius of curvature R10 of the image side surface of the fifth lens satisfy: 0 < |D0m / R10| < 6.0.

[0008] In one embodiment, the plurality of spacers further includes a first spacer disposed between the first lens and the second lens and abutting against the image side of the first lens, and a fourth spacer disposed between the fourth lens and the fifth lens and abutting against the image side of the fourth lens.

[0009] In one embodiment, the optical imaging lens further includes at least one of a third auxiliary isolation member disposed between the image side of the third isolation member and the object side of the fourth lens, and a fourth auxiliary isolation member disposed between the image side of the fourth isolation member and the object side of the fifth lens.

[0010] In one embodiment, the radius of curvature R4 of the image side of the second lens, the radius of curvature R6 of the image side of the third lens, the maximum thickness CP2 of the second isolator along the optical axis, and the maximum thickness CP3 of the third isolator along the optical axis satisfy: -110mm < (R4×R6) / CP2 / 10 < 0mm, and -110mm < (R4×R6) / CP3 / 10 < 0mm.

[0011] In one embodiment, the air gap T23 between the second and third lenses on the optical axis, the maximum thickness CP2 of the second separator along the optical axis, the maximum thickness CP3 of the third separator along the optical axis, and the air gap T34 between the third and fourth lenses on the optical axis satisfy: 7.5 <T23 / CP2+CP3 / T34<22.5。

[0012] In one embodiment, the effective focal length f3 of the third lens, the effective focal length f2 of the second lens, and the spacing EP23 between the second and third isolators along the optical axis satisfy: 6.5 < |f3-|f2|| / EP23 < 30.5.

[0013] In one embodiment, the distance TD between the object side of the first lens and the image side of the fifth lens along the optical axis, the spacing EP23 between the second and third spacers along the optical axis, and the spacing EP12 between the first and second spacers along the optical axis satisfy: 2.5 <TD / (EP23+EP12)<6.5。

[0014] In one embodiment, the radius of curvature R3 of the object side of the second lens, the radius of curvature R4 of the image side of the second lens, the maximum thickness CP1 of the first isolator along the optical axis, and the maximum thickness CP2 of the second isolator along the optical axis satisfy: 5.5 < (R3 + R4) / (CP1 + CP2) / 10 < 21.5.

[0015] In one embodiment, the effective focal length f of the optical imaging lens, the inner diameter d0m of the image-side end of the lens barrel, and the inner diameter d0s of the object-side end of the lens barrel satisfy: 3.5mm 2 <f×(d0m-d0s)<11.5mm2 .

[0016] In one embodiment, the outer diameter D3m of the image side of the third isolator, the outer diameter D2m of the image side of the second isolator, the maximum effective radius DT32 of the image side of the third lens, and the maximum effective radius DT22 of the image side of the second lens satisfy: 0 < (D3m - D2m) / (DT32 - DT22) < 5.5.

[0017] In one embodiment, the outer diameter D0m of the image-side end of the lens barrel and the radius of curvature R10 of the image-side surface of the fifth lens satisfy: 0 < |D0m / R10| < 6.0.

[0018] In one embodiment, the radius of curvature R4 of the image-side surface of the second lens, the radius of curvature R6 of the image-side surface of the third lens, the inner diameter d3s of the object-side surface of the third separator, and the inner diameter d2s of the object-side surface of the second separator satisfy: -8.5 <R6 / R4+d3s / d2s<0。

[0019] In one embodiment, the distance EP23 between the second and third spacers along the optical axis, and the refractive index N2 and refractive index N3 of the second and third lenses respectively satisfy: 2.0 mm. <EP23 / (N2-N3)<11.5mm。

[0020] In one embodiment, the maximum height L of the lens barrel along the optical axis, the distance EP01 from the object-side end of the lens barrel to the object-side surface of the first spacer on the optical axis, and the sum of the air gaps ∑AT between any two adjacent lenses among the first to fifth lenses on the optical axis satisfy: 4.2 mm. <L / EP01×∑AT<11.5mm。

[0021] This application relates to a five-element ultra-thin lens, which is prone to stray light due to its high refractive index lenses. Furthermore, the lens molding process has certain limitations. By rationally allocating the optical power of the lenses and controlling the relationship between the lens height, effective focal length, and maximum half-field angle within a reasonable range, the lens can achieve a thinner and lighter design while maintaining a large imaging surface. Further control of the inner diameter of the image side of the second isolator, the inner diameter of the object side of the third isolator, and the relationship between the curvature radii of the image sides of the second and third lenses within a reasonable range helps improve the molding processability of the second and third lenses, enhances assembly stability, controls the lens barrel size, and helps control the phenomenon of large outer diameter differences between the second and third lenses. It also improves the problems of transmitted stray light and internal reflection stray light between the second and third lenses, thereby enhancing the lens's image quality.

[0022] The optical imaging lens provided in this application satisfies 6.5 < |f3-|f2|| / EP23 < 30.5. By constraining the effective focal lengths of the second and third lenses, it helps to rationally allocate optical power, improve the imaging quality of the optical imaging lens, and has a positive effect on mold forming and lens strength. The larger the EP23, the easier it is to select the isolator, the greater the optimization space for field adjustment, and the greater the space for improving stray light, thus helping to improve the overall stray light quality of the optical imaging system. The optical imaging lens provided in this application also satisfies 0 < |D0m / R10| < 6.0, and comprehensively considers the manufacturability of the mold to ensure the uniformity of the contour shape of the fifth lens, avoiding the problems of easy breakage due to the excessive length of the fifth lens mechanism and easy chipping due to the thin edge. Satisfying 0 < |D0m / R10| < 6.0 also helps to improve the problem of lens weld lines caused by the excessive thickness ratio of the fifth lens, improves lens forming, and avoids the risk of weld lines in advance. Attached Figure Description

[0023] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0024] Figure 1 A structural layout diagram and schematic diagram of some parameters of an optical imaging lens according to this application are shown;

[0025] Figures 2A to 2C A schematic diagram of the structure of an optical imaging lens according to Embodiment 1 of this application is shown;

[0026] Figures 3A to 3D The on-axis chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of the optical imaging lens according to Embodiment 1 of this application are shown respectively.

[0027] Figures 4A to 4C A schematic diagram of the structure of an optical imaging lens according to Embodiment 2 of this application is shown;

[0028] Figures 5A to 5D The on-axis chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of the optical imaging lens according to Embodiment 2 of this application are shown respectively.

[0029] Figures 6A to 6C A schematic diagram of the structure of an optical imaging lens according to Embodiment 3 of this application is shown; and

[0030] Figures 7A to 7D The on-axis chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of the optical imaging lens according to Embodiment 3 of this application are shown respectively. Detailed Implementation

[0031] To better understand this application, various aspects of this application will be described in more detail with reference to the accompanying drawings. It should be understood that these detailed descriptions are merely illustrative of exemplary embodiments of this application and are not intended to limit the scope of this 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.

[0032] It should be noted that in this specification, the terms "first," "second," "third," etc., are used only to distinguish one feature from another and do not imply any limitation on the features. Therefore, without departing from the teachings of this application, the first lens discussed below may also be referred to as the second or third lens.

[0033] In the accompanying drawings, the thickness, size, and shape of the lenses have been slightly exaggerated for ease of illustration. Specifically, the shapes of the spherical or aspherical surfaces shown in the drawings are illustrated by way of example. That is, the shapes of the spherical or aspherical surfaces are not limited to those shown in the drawings. The drawings are for illustrative purposes only and are not drawn strictly to scale.

[0034] In this article, curvature or paraxial curvature refers to the curvature of the region near the optical axis. If the curvature of a lens surface is positive and its location is not defined, it means that the curvature of the lens surface is positive at least in the paraxial region; if the curvature of a lens surface is negative and its location is not defined, it means that the curvature of the lens surface is negative at least in the paraxial region. The surface of each lens closest to the subject is called the object-side surface of the lens, and the surface of each lens closest to the imaging plane is called the image-side surface of the lens.

[0035] It should also be understood that the terms "comprising," "including," "having," "containing," 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. Furthermore, when expressions such as "at least one of..." appear after a list of listed features, they modify the entire list of features, not individual elements in the list. Additionally, when describing embodiments of this application, the word "may" is used to mean "one or more embodiments of this application." And the term "exemplary" is intended to refer to an example or illustration.

[0036] Unless otherwise specified, all terms used herein (including technical and scientific terms) shall have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. It should also be understood that terms (e.g., those defined in common dictionaries) shall be interpreted as having the meaning consistent with their meaning in the context of the relevant art and shall not be interpreted in an idealized or overly formalized sense, unless expressly so specified herein.

[0037] It should be noted that, unless otherwise specified, the embodiments and features described in the embodiments of this application can be combined with each other. The following embodiments only illustrate several implementation methods of this application, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the patent application. It should be pointed out that, for those skilled in the art, several modifications and improvements can be made without departing from the concept of this application, and these all fall within the protection scope of this application. For example, the lens groups (i.e., the first to fifth lenses), lens barrel structures, and spacers in the various embodiments of this application can be arbitrarily combined, and it is not limited to the lens group in one embodiment being combined only with the lens barrel structure, spacers, etc. of that embodiment.

[0038] The present application will now be described in detail with reference to the accompanying drawings and embodiments. Figure 1 This diagram illustrates the structural layout and schematic diagram of some parameters of an optical imaging lens according to this application. Those skilled in the art will understand that some parameters frequently used in the art, such as the air gap T23 between the second and third lenses on the optical axis, are not shown. Figure 1 As shown in the figure, Figure 1 The following are merely illustrative examples of partial parameters of the lens barrel and insulating component of an optical imaging lens according to this application, to facilitate a better understanding of the invention. Figure 1 As shown, EP01 represents the distance along the optical axis from the object-side end of the lens barrel to the object-side surface of the first spacer; EP12 represents the spacing between the first and second spacers along the optical axis; EP23 represents the spacing between the second and third spacers along the optical axis; L represents the maximum height of the lens barrel along the optical axis (i.e., the distance along the optical axis from the object-side end of the lens barrel near the object side to the image-side end of the lens barrel near the image side); CP3 represents the maximum thickness of the third spacer along the optical axis; CP2 represents the maximum thickness of the second spacer along the optical axis; d0s represents the inner diameter of the object-side end of the lens barrel; D0s d3s represents the outer diameter of the object-side end of the lens barrel; d3s represents the inner diameter of the object-side side of the third spacer; D3s represents the outer diameter of the object-side side of the third spacer; d2m represents the inner diameter of the image-side side of the second spacer; D2m represents the outer diameter of the image-side side of the second spacer; d2s represents the inner diameter of the object-side side of the second spacer; D2s represents the outer diameter of the object-side side of the second spacer; d3m represents the inner diameter of the image-side side of the third spacer; D3m represents the outer diameter of the image-side side of the third spacer; D0m represents the outer diameter of the image-side end of the lens barrel near the image side; d0m represents the inner diameter of the image-side end of the lens barrel near the image side.

[0039] An optical imaging lens according to an exemplary embodiment of the present application includes an imaging lens group and a plurality of spacers. Among them, the imaging lens group includes, in order from the object side to the image side along the optical axis: a first lens, a second lens, a third lens, a fourth lens, and a fifth lens. Among them, three lenses with positive optical power are included among the lenses with a refractive index less than 1.65 in the imaging lens group, and the absolute value of the effective focal length of the fifth lens in the imaging lens group is the smallest. Reasonably setting the optical power and refractive index of the lenses is conducive to finally refracting the light path and making the imaging surface large enough. On the basis of reasonably setting the optical power and refractive index of the lenses, the optical imaging lens according to the present application can satisfy: 0.8 < L / (f × tan(Semi-FOV)) < 1.7 and 3.5 < (R4 - R6) / (d3s - d2m) < 26.5, where L is the maximum height of the lens barrel along the optical axis, f is the effective focal length of the optical imaging lens, Semi-FOV is the maximum semi-field angle of the optical imaging lens, R4 is the radius of curvature of the image side of the second lens, R6 is the radius of curvature of the image side of the third lens, d3s is the inner diameter of the object side of the third spacer, and d2m is the inner diameter of the image side of the second spacer. Satisfying 0.8 < L / (f × tan(Semi-FOV)) < 1.7 and 3.5 < (R4 - R6) / (d3s - d2m) < 26.5, by controlling the relationship between the lens height, effective focal length, and maximum semi-field angle, on the premise of ensuring a sufficiently large imaging surface, the optical power is reasonably distributed to improve the imaging quality of the optical lens; controlling the relationship between the inner diameter of the image side of the second spacer, the inner diameter of the object side of the third spacer, and the radii of curvature of the image sides of the second and third lenses within a reasonable range helps to improve the molding processability of the second and third lenses, improve the assembly stability, and control the lens barrel size; at the same time, it also helps to improve the problems of penetrating stray light and internal reflection stray light between the second and third lenses and enhance the imaging quality of the lens.

[0040] In an exemplary embodiment, the plurality of spacers may include a first spacer placed between the first lens and the second lens and abutting against the image side of the first lens, a second spacer placed between the second lens and the third lens and abutting against the image side of the second lens, a third spacer placed between the third lens and the fourth lens and abutting against the image side of the third lens, and a fourth spacer placed between the fourth lens and the fifth lens and abutting against the image side of the fourth lens. The first spacer can effectively intercept light, control the light passing amount of the lens light entering the second lens, improve the stray light generated after passing through the second lens, and enhance the stray light yield of the lens; for a five-piece optical imaging lens, the fourth spacer plays a key role in whether the last lens generates stray light when there is no auxiliary spacer. Under the condition of ensuring the lens illuminance, the more light is blocked, the better the stray light is improved, and the higher the imaging quality of the lens.

[0041] In an exemplary embodiment, the optical imaging lens further includes at least one of a third auxiliary isolation member disposed between the image-side surface of the third isolation member and the object-side surface of the fourth lens, and a fourth auxiliary isolation member disposed between the image-side surface of the fourth isolation member and the object-side surface of the fifth lens. It is understood that the first to fourth isolation members are primary isolation members, disposed on the image-side surface of the lens and at least partially in contact with it, while the auxiliary isolation members are secondary isolation members disposed on the image-side surface of the primary isolation members. For large step-change lenses, the spacing between the last three lens elements is relatively large. Considering the manufacturability of the mold, to ensure the uniformity of the lens contour shape gradient, avoid the problem of lens chipping due to irregular shape and thin edges, and avoid affecting the lens surface shape, strength, and injection molding flowability, thick isolation members are usually added. For example, the third and fourth isolation members have a large thickness along the optical axis. Adding auxiliary isolation members can effectively absorb stray light generated by the inner diameter surface of the thick isolation member, while preventing light from entering the next lens and generating unrecoverable internal reflection stray light.

[0042] It should be understood that this application does not specifically limit the number of isolators; any number of isolators may be included between any two lens elements, and the entire optical imaging lens may also include any number of isolators. Isolators help the optical imaging lens intercept excess refractive and reflected light paths, reducing stray light and ghosting. Adding auxiliary support between the isolators and the lens barrel helps improve problems such as poor assembly stability and low performance yield caused by large step differences between lens elements.

[0043] In an exemplary embodiment, the optical imaging lens further includes a lens barrel for housing an imaging lens group and a plurality of spacers. The lens barrel has an object-side end near the object side and an image-side end near the image side, and the interior of the lens barrel has a through-hole for light to pass through.

[0044] In an exemplary embodiment, the optical imaging lens according to the present application can satisfy: -110 mm < (R4 × R6) / CP2 / 10 < 0 mm, and -110 mm < (R4 × R6) / CP3 / 10 < 0 mm, where R4 is the radius of curvature of the image side of the second lens, R6 is the radius of curvature of the image side of the third lens, CP2 is the maximum thickness of the second spacer along the optical axis direction, and CP3 is the maximum thickness of the third spacer along the optical axis direction. More specifically, R4, R6, CP2, and CP3 can further satisfy: -110 mm < (R4 × R6) / CP2 / 10 < -20 mm, and -70 mm < (R4 × R6) / CP3 / 10 < 0 mm. The radius of curvature R4 of the image side of the second lens and the radius of curvature R6 of the image side of the third lens determine the surface type trends of the second lens and the third lens, and at the same time affect the maximum thicknesses of the second spacer and the third spacer. When the maximum thickness of the second spacer is closer to the bandwidth size of the third spacer, the improvement of the assembly stability of the lens is more obvious, and the assembly stability of the lens is better. Therefore, satisfying -110 mm < (R4 × R6) / CP2 / 10 < 0 mm, and -110 mm < (R4 × R6) / CP3 / 10 < 0 mm plays an important role in reducing the field curvature sensitivity and improving the lens assembly yield.

[0045] In an exemplary embodiment, the optical imaging lens according to the present application can satisfy: 7.5 < T23 / CP2 + CP3 / T34 < 22.5, where T23 is the air gap between the second lens and the third lens on the optical axis, CP2 is the maximum thickness of the second spacer along the optical axis direction, CP3 is the maximum thickness of the third spacer along the optical axis direction, and T34 is the air gap between the third lens and the fourth lens on the optical axis. Satisfying 7.5 < T23 / CP2 + CP3 / T34 < 22.5, by controlling the relationship between the air gap between the second lens and the third lens on the optical axis and the maximum thickness of the second spacer within a reasonable range, an optimal bearing position can be adopted for the third lens to improve the assembly stability and reduce the field curvature change amount of the outer field of view after high temperature and high humidity; in addition, by controlling the maximum thickness of the third spacer, the change amount of the air gap along the optical axis between the third lens and the fourth lens during assembly can be reduced, thereby improving the problem of peak drop in the outer field of view during assembly and enhancing the lens performance.

[0046] In an exemplary embodiment, the optical imaging lens according to the present application can satisfy: 6.5 < |f3 - |f2|| / EP23 < 30.5, where f3 is the effective focal length of the third lens, f2 is the effective focal length of the second lens, and EP23 is the distance between the second spacer and the third spacer along the optical axis direction. Satisfying 6.5 < |f3 - |f2|| / EP23 < 30.5 helps to reasonably distribute the optical power by constraining the effective focal lengths of the second lens and the third lens, improves the imaging quality of the optical imaging lens, has a positive effect on mold forming and lens strength. The larger EP23 is, the easier it is to select the spacer, and the larger the optimization space for field area adjustment is, and at the same time, the larger the stray light improvement space is, which is beneficial to improving the overall stray light quality of the optical imaging system.

[0047] In an exemplary embodiment, the optical imaging lens according to the present application can satisfy: 2.5 < TD / (EP23 + EP12) < 6.5, where TD is the distance on the optical axis from the object side surface of the first lens to the image side surface of the fifth lens, EP23 is the distance between the second spacer and the third spacer along the optical axis direction, and EP12 is the distance between the first spacer and the second spacer along the optical axis direction. Satisfying 2.5 < TD / (EP23 + EP12) < 6.5 can effectively control the height of the lens barrel, achieve ultra-thin lenses, reduce the lens volume, and can also effectively control the edge thickness and outer diameter of the lens, improve the extreme process during lens production, ensure that the outer diameters of the first two or the first three lenses are not very different, prevent large step differences from occurring here, and are more conducive to performance stability.

[0048] In an exemplary embodiment, the optical imaging lens according to the present application can satisfy: 5.5 < (R3 + R4) / (CP1 + CP2) / 10 < 21.5, where R3 is the radius of curvature of the object side surface of the second lens, R4 is the radius of curvature of the image side surface of the second lens, CP1 is the maximum thickness of the first spacer along the optical axis direction, and CP2 is the maximum thickness of the second spacer along the optical axis direction. Satisfying 5.5 < (R3 + R4) / (CP1 + CP2) / 10 < 21.5 can keep the wall thickness of the mechanism part within a reasonable range, ensure the stability of molding, help to control the size of the spacer, and prevent the lenses from contacting each other and breaking during the reliability experiment, resulting in abnormal phenomena.

[0049] In an exemplary embodiment, the optical imaging lens according to the present application can satisfy: 3.5mm 2 < f × (d0m - d0s) < 11.5mm 2 , where f is the effective focal length of the optical imaging lens, d0m is the inner diameter of the image side end of the lens barrel, and d0s is the inner diameter of the object side end of the lens barrel. Satisfying 3.5mm 2 < f × (d0m - d0s) < 11.5mm 2, it can ensure that the lens barrel has sufficient stiffness and strength, which helps to improve the wall thickness uniformity of the lens barrel, reduce the molding risk of the lens barrel, ensure the processing stability of the lens barrel replication mold and reduce the risk of its appearance abrasion. At the same time, it can ensure that the true roundness of the inner diameter of the lens barrel is within the design requirements of the lens, improving the assembly stability of the lens group.

[0050] In an exemplary embodiment, the optical imaging lens according to the present application can satisfy: 0 < (D3m - D2m) / (DT32 - DT22) < 5.5, where D3m is the outer diameter of the image side of the third spacer, D2m is the outer diameter of the image side of the second spacer, DT32 is the maximum effective radius of the image side of the third lens, and DT22 is the maximum effective radius of the image side of the second lens. Satisfying 0 < (D3m - D2m) / (DT32 - DT22) < 5.5 and reasonably controlling the mutual relationship among the outer diameter of the image side of the second spacer, the outer diameter of the image side of the third spacer, the maximum effective radius of the image side of the third lens, and the maximum effective radius of the image side of the second lens can ensure that the second spacer and the third spacer effectively block stray light, and make the second spacer and the third spacer as close as possible to the edge of the chief ray. The third spacer is located at a position close to the maximum effective radius of the image side of the third lens to improve the imaging quality of the optical imaging lens. At the same time, since the outer diameter of the lens barrel increases sequentially from the object side to the image side, satisfying this relational expression can also ensure the uniformity of the lens barrel, which is beneficial to improving the assembly stability of the optical imaging lens.

[0051] In an exemplary embodiment, the optical imaging lens according to the present application can satisfy: 0 < |D0m / R10| < 6.0, where D0m is the outer diameter of the image side end of the lens barrel and R10 is the curvature radius of the image side of the fifth lens. Satisfying 0 < |D0m / R10| < 6.0 and comprehensively considering the processability of the mold can ensure the uniform change of the contour shape of the fifth lens, avoiding the problems that the fifth lens is easy to break due to too long mechanical part and easy to crack due to too thin edge; satisfying this relational expression can also help to improve the problem of the welding mark of the lens caused by the too thick thickness ratio of the fifth lens, improve the lens molding and avoid the risk of welding marks in advance.

[0052] In an exemplary embodiment, the optical imaging lens according to the present application can satisfy: -8.5 < R6 / R4 + d3s / d2s < 0, where R6 is the curvature radius of the image side of the third lens, R4 is the curvature radius of the image side of the second lens, d3s is the inner diameter of the object side of the third spacer, and d2s is the inner diameter of the object side of the second spacer. Satisfying -8.5 < R6 / R4 + d3s / d2s < 0, by controlling the curvature radius of the image side of the second lens and the third lens and the inner diameter of the object side of the second spacer and the third spacer, the maximum step size between the lenses can be ensured to be within a reasonable value range, which can effectively ensure the assembly stability and then ensure the stability of the performance yield.

[0053] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: 2.0 mm < EP23 / (N2 - N3) < 11.5 mm, where EP23 is the distance between the second spacer and the third spacer along the optical axis, N2 is the refractive index of the second lens, and N3 is the refractive index of the third lens. Satisfying 2.0 mm < EP23 / (N2 - N3) < 11.5 mm helps to ensure the imaging and assembly stability of the optical imaging lens. The imaging light is refracted by the second lens and the third lens, crosses and converges, and finally converges to form an image at the imaging surface. Reasonably selecting the refractive indices of the second lens and the third lens can ensure that the incident light shows a converging trend when passing through the second lens and a diverging trend when passing through the third lens, which can ensure the rationality of the trend of the incident light when passing through the third lens, effectively block stray light, and at the same time make the second lens bear the corresponding amount of third-order distortion aberration, so that the system can reasonably control the distortion and improve the imaging quality of the optical imaging lens.

[0054] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: 4.2 mm < L / EP01×∑AT < 11.5 mm, where L is the maximum height of the lens barrel along the optical axis, EP01 is the distance on the optical axis from the object side end of the lens barrel to the object side surface of the first spacer, and ∑AT is the sum of the air gaps between any two adjacent lenses among the first lens to the fifth lens on the optical axis. Satisfying 4.2 mm < L / EP01×∑AT < 11.5 mm keeps the overall thickness of the lenses sufficient when the height of the head of the lens barrel is fixed. This strengthens the bearing strength of the top surface of the first lens. When the position of the exit hole is fixed, the position of the flare can be freely adjusted, making the overall thickness of the lenses at the position of the light passing hole sufficient and plump, which is beneficial to improving the problems of feathers and other stray light caused by the insufficient overall thickness of the lenses resulting in the exit hole being shiny and white during injection molding.

[0055] In an exemplary embodiment, the first lens has a positive optical power, the second lens has a positive or negative optical power, the third lens has a positive optical power, the fourth lens has a positive optical power, and the fifth lens has a negative optical power.

[0056] 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. The optical imaging lens according to the above embodiment of the present application may employ multiple lenses, such as the five lenses mentioned above. By reasonably distributing the optical power, surface shape, central thickness of each lens, and the axial spacing between each lens, etc., the incident light can be effectively converged, the optical total length of the imaging lens can be reduced, and the processability of the imaging lens can be improved, making the optical imaging lens more conducive to production and processing.

[0057] In embodiments of this application, at least one of the mirror surfaces of each lens is an aspherical mirror surface; that is, at least one mirror surface from the object-side surface of the first lens to the image-side surface of the fifth lens is an aspherical mirror surface. The characteristic of an aspherical lens is that its curvature changes continuously from the center to the periphery of the lens. Unlike spherical lenses, which have a constant curvature from the center to the periphery, aspherical lenses have better radius of curvature characteristics, offering advantages in improving distortion aberrations and astigmatism. By using aspherical lenses, aberrations occurring during imaging can be eliminated as much as possible, thereby improving image quality. Optionally, the object-side surface and image-side surface of each of the first, second, third, fourth, and fifth lenses are aspherical mirror surfaces.

[0058] The following describes in further detail, with reference to the accompanying drawings, specific embodiments of the optical imaging lens applicable to the above-described embodiments.

[0059] Example 1

[0060] The following is for reference Figures 2A to 3D The optical imaging lens 1001, optical imaging lens 1002 and optical imaging lens 1003 according to Embodiment 1 of this application are described. Figures 2A to 2C Schematic diagrams of the optical imaging lens 1001, optical imaging lens 1002 and optical imaging lens 1003 according to Embodiment 1 of this application are shown respectively.

[0061] like Figures 2A to 2C As shown, optical imaging lenses 1001, 1002 and 1003 each include a lens barrel P0, imaging lens groups E1 to E5 and multiple isolation components P1 to P4.

[0062] like Figures 2A to 2C As shown, optical imaging lenses 1001, 1002, and 1003 employ the same imaging lens group, which, from the object side to the image side, sequentially includes: 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 positive optical power and has an object-side surface S1 and an image-side surface S2. The second lens E2 has negative optical power and has an object-side surface S3 and an image-side surface S4. The third lens E3 has positive optical power and has an object-side surface S5 and an image-side surface S6. The fourth lens E4 has positive optical power and has an object-side surface S7 and an image-side surface S8. The fifth lens E5 has negative optical power and has an object-side surface S9 and an image-side surface S10. A filter (not shown) has an object-side surface S11 (not shown) and an image-side surface S12 (not shown). Light from the object passes sequentially through surfaces S1 to S12 and is finally imaged onto the imaging surface S13 (not shown).

[0063] Table 1 shows the basic parameters of the imaging lens group of optical imaging lens 1001, optical imaging lens 1002 and optical imaging lens 1003 in Embodiment 1, wherein the units of radius of curvature, thickness and focal length are all millimeters (mm).

[0064]

[0065] Table 1

[0066] In this example, optical imaging lenses 1001, 1002, and 1003 also have the following basic parameters: the effective focal length f of optical imaging lenses 1001, 1002, and 1003 is 3.23 mm, and the maximum semi-field of view (Semi-FOV) of optical imaging lenses 1001, 1002, and 1003 is 42.68°.

[0067] In Example 1, the object-side surface and image-side surface of the first lens E1 to the fifth lens E5 are aspherical, and the surface shape x of each aspherical lens can be defined using, but is not limited to, the following aspherical formula:

[0068]

[0069] Where x is the distance vector from the vertex of the aspherical surface 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 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. Tables 2-1 and 2-2 give the higher-order coefficients A4, A6, A8, A10 that can be used for each aspherical mirror S1-S10 in Example 1. 10 A 12 A 14 A 16 A 18 A 20 A 22 A 24 A 26 A 28 and A 30 .

[0070] Face number A4 A6 A8 A10 A12 A14 A16 S1 1.83E-02 -6.19E-01 5.98E+00 -3.57E+01 1.39E+02 -3.69E+02 6.85E+02 S2 -2.91E+00 1.50E+01 -4.77E+01 9.82E+01 -1.30E+02 1.05E+02 -4.79E+01 S3 -2.78E+00 1.90E+01 -1.70E+02 1.69E+03 -1.28E+04 6.75E+04 -2.54E+05 S4 -3.71E-01 6.48E-01 6.22E+00 -4.73E+01 1.48E+02 -2.28E+02 1.44E+02 S5 -2.18E-01 1.05E-01 -6.97E-01 3.37E+00 -7.43E+00 5.95E+00 0.00E+00 S6 -2.19E-01 -4.11E-01 2.75E+00 -1.11E+01 2.81E+01 -4.25E+01 3.46E+01 S7 -1.62E-01 1.13E-01 3.92E-01 -1.11E+01 6.50E+01 -2.11E+02 4.34E+02 S8 -1.06E-01 4.62E-01 -1.39E+00 -5.83E-01 1.83E+01 -7.12E+01 1.59E+02 S9 -7.23E-01 1.66E+00 -5.09E+00 1.36E+01 -2.72E+01 3.95E+01 -4.16E+01 S10 -7.90E-01 1.57E+00 -3.03E+00 4.67E+00 -5.40E+00 4.63E+00 -2.94E+00

[0071] Table 2-1

[0072] Face number A18 A20 A22 A24 A26 A28 A30 S1 -9.02E+02 8.45E+02 -5.58E+02 2.53E+02 -7.49E+01 1.29E+01 -9.88E-01 S2 9.28E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 S3 6.86E+05 -1.34E+06 1.89E+06 -1.86E+06 1.22E+06 -4.78E+05 8.47E+04 S4 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 S5 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 S6 -1.13E+01 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 S7 -5.89E+02 5.23E+02 -2.92E+02 9.27E+01 -1.28E+01 0.00E+00 0.00E+00 S8 -2.35E+02 2.42E+02 -1.74E+02 8.59E+01 -2.79E+01 5.36E+00 -4.63E-01 S9 3.19E+01 -1.77E+01 7.00E+00 -1.92E+00 3.48E-01 -3.72E-02 1.78E-03 S10 1.38E+00 -4.79E-01 1.21E-01 -2.15E-02 2.56E-03 -1.82E-04 5.87E-06

[0073] Table 2-2

[0074] like Figures 2A to 2CAs shown, the optical imaging lenses 1001, 1002, and 1003 each include a first isolation member P1, a second isolation member P2, a third isolation member P3, and a fourth isolation member P4. Specifically, the first isolation member P1 is disposed between the first lens E1 and the second lens E2 and contacts the image-side surface of the first lens E1; the second isolation member P2 is disposed between the second lens E2 and the third lens E3 and contacts the image-side surface of the second lens E2; the third isolation member P3 is disposed between the third lens E3 and the fourth lens E4 and contacts the image-side surface of the third lens E3; and the fourth isolation member P4 is disposed between the fourth lens E4 and the fifth lens E5 and contacts the image-side surface of the fourth lens E4. These isolation members can block excess external light from entering, allowing the lenses to better contact the lens barrel and enhancing the structural stability of the optical imaging lenses 1001, 1002, and 1003.

[0075] like Figure 2A As shown, the optical imaging lens 1001 also includes a third auxiliary isolation member P3b disposed between the image-side surface of the third isolation member P3 and the object-side surface of the fourth lens E4, and a fourth auxiliary isolation member P4b disposed between the image-side surface of the fourth isolation member P4 and the object-side surface of the fifth lens E5. Figure 2B As shown, the optical imaging lens 1002 also includes a third auxiliary spacer P3b positioned between the image-side surface of the third spacer P3 and the object-side surface of the fourth lens E4. For example... Figure 2C As shown, the optical imaging lens 1003 also includes a fourth auxiliary isolation member P4b placed between the image side of the fourth isolation member P4 and the object side of the fifth lens E5.

[0076] Table 3 shows the basic parameters of the lenses, spacers, and lens barrels of optical imaging lenses 1001, 1002, and 1003 in Embodiment 1. The unit of each parameter in Table 3 is millimeters (mm).

[0077]

[0078]

[0079] Table 3

[0080] Figure 3A The on-axis chromatic aberration curves of optical imaging lenses 1001, 1002 and 1003 of Embodiment 1 are shown, which indicate the deviation of the focal point of light of different wavelengths after passing through the lens. Figure 3B The astigmatism curves of optical imaging lenses 1001, 1002 and 1003 of Embodiment 1 are shown, which represent the meridional image plane curvature and the sagittal image plane curvature. Figure 3CThe distortion curves of optical imaging lenses 1001, 1002 and 1003 of Embodiment 1 are shown, which represent the distortion magnitude values ​​corresponding to different field of view angles. Figure 3D The magnification chromatic aberration curves of optical imaging lenses 1001, 1002, and 1003 of Embodiment 1 are shown, representing the deviations in image height at different points on the imaging plane after light passes through the lenses. According to... Figures 3A to 3D It can be seen that the optical imaging lens 1001, optical imaging lens 1002 and optical imaging lens 1003 given in Example 1 can achieve good imaging quality.

[0081] Example 2

[0082] The following is for reference Figures 4A to 5D The optical imaging lens 2001, optical imaging lens 2002, and optical imaging lens 2003 according to Embodiment 2 of this application are described. In this embodiment and the following embodiments, for the sake of brevity, some descriptions similar to those in Embodiment 1 will be omitted. Figures 4A to 4C Schematic diagrams of the optical imaging lens 2001, optical imaging lens 2002 and optical imaging lens 2003 according to Embodiment 2 of this application are shown respectively.

[0083] like Figures 4A to 4C As shown, optical imaging lenses 2001, 2002 and 2003 each include a lens barrel P0, imaging lens groups E1 to E5 and multiple isolation components P1 to P4.

[0084] like Figures 4A to 4C As shown, optical imaging lenses 2001, 2002, and 2003 employ the same imaging lens group, which, from the object side to the image side, sequentially includes: 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 positive optical power and has an object-side surface S1 and an image-side surface S2. The second lens E2 has negative optical power and has an object-side surface S3 and an image-side surface S4. The third lens E3 has positive optical power and has an object-side surface S5 and an image-side surface S6. The fourth lens E4 has positive optical power and has an object-side surface S7 and an image-side surface S8. The fifth lens E5 has negative optical power and has an object-side surface S9 and an image-side surface S10. A filter (not shown) has an object-side surface S11 (not shown) and an image-side surface S12 (not shown). Light from the object passes sequentially through each surface S1 to S12 and is finally imaged onto the imaging surface S13 (not shown).

[0085] In this example, optical imaging lenses 2001, 2002, and 2003 also have the following basic parameters: the effective focal length f of optical imaging lenses 2001, 2002, and 2003 is 4.07 mm, and the maximum semi-FOV of optical imaging lenses 2001, 2002, and 2003 is 37.22°.

[0086] Table 4 shows the basic parameters of the imaging lens groups of optical imaging lenses 2001, 2002 and 2003 in Embodiment 2, wherein the units of radius of curvature, thickness and focal length are millimeters (mm). Tables 5-1 and 5-2 show the higher-order coefficients that can be used for each aspherical mirror in Embodiment 2, wherein each aspherical surface shape can be defined by formula (1) given in Embodiment 1 above.

[0087]

[0088] Table 4

[0089] Face number A4 A6 A8 A10 A12 A14 A16 S1 7.82E-03 8.78E-02 -7.95E-01 5.43E+00 -2.06E+01 4.43E+01 -5.18E+01 S2 2.25E-01 -5.15E-01 2.11E+00 -7.56E+00 1.41E+01 -1.14E+01 3.35E+00 S3 -5.82E-02 2.04E+00 -3.54E+01 4.38E+02 -3.70E+03 2.17E+04 -9.06E+04 S4 -2.06E-01 5.40E-01 1.53E+00 -2.35E+01 1.28E+02 -4.24E+02 9.04E+02 S5 -1.23E-01 -5.95E-02 4.23E-01 -9.23E-01 1.11E+00 -2.76E-01 -1.62E-01 S6 -9.37E-02 -2.63E-01 1.31E+00 -5.04E+00 1.33E+01 -2.35E+01 2.78E+01 S7 -1.38E-02 9.00E-02 -8.69E-01 1.70E+00 9.75E-01 -1.13E+01 2.50E+01 S8 2.80E-01 -6.03E-01 2.36E+00 -9.75E+00 2.81E+01 -5.44E+01 7.23E+01 S9 1.65E+00 -4.63E+00 8.66E+00 -1.12E+01 1.03E+01 -6.89E+00 3.38E+00 S10 1.14E+00 -2.92E+00 4.54E+00 -4.83E+00 3.67E+00 -2.04E+00 8.42E-01

[0090] Table 5-1

[0091] Face number A18 A20 A22 A24 A26 A28 A30 S1 3.06E+01 -6.71E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 S2 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 S3 2.73E+05 -5.94E+05 9.25E+05 -1.00E+06 7.20E+05 -3.07E+05 5.90E+04 S4 -1.20E+03 8.89E+02 -2.83E+02 0.00E+00 0.00E+00 0.00E+00 0.00E+00 S5 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 S6 -2.10E+01 9.16E+00 -1.76E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 S7 -2.98E+01 2.17E+01 -9.63E+00 2.41E+00 -2.60E-01 0.00E+00 0.00E+00 S8 -6.78E+01 4.52E+01 -2.14E+01 7.04E+00 -1.53E+00 1.98E-01 -1.16E-02 S9 -1.22E+00 3.25E-01 -6.27E-02 8.53E-03 -7.77E-04 4.24E-05 -1.05E-06 S10 -2.58E-01 5.84E-02 -9.62E-03 1.12E-03 -8.68E-05 4.03E-06 -8.46E-08

[0092] Table 5-2

[0093] like Figures 4A to 4C As shown, the optical imaging lenses 2001, 2002, and 2003 each include a first isolation member P1, a second isolation member P2, a third isolation member P3, and a fourth isolation member P4. Specifically, the first isolation member P1 is disposed between the first lens E1 and the second lens E2 and contacts the image-side surface of the first lens E1; the second isolation member P2 is disposed between the second lens E2 and the third lens E3 and contacts the image-side surface of the second lens E2; the third isolation member P3 is disposed between the third lens E3 and the fourth lens E4 and contacts the image-side surface of the third lens E3; and the fourth isolation member P4 is disposed between the fourth lens E4 and the fifth lens E5 and contacts the image-side surface of the fourth lens E4. These isolation members can block excess external light from entering, allowing the lenses to better contact the lens barrel and enhancing the structural stability of the optical imaging lenses 2001, 2002, and 2003.

[0094] like Figure 4A As shown, the optical imaging lens 2001 also includes a fourth auxiliary spacer P4b positioned between the image-side surface of the fourth spacer P4 and the object-side surface of the fifth lens E5. For example... Figure 4BAs shown, the optical imaging lens 2002 also includes a third auxiliary isolation member P3b disposed between the image-side surface of the third isolation member P3 and the object-side surface of the fourth lens E4, and a fourth auxiliary isolation member P4b disposed between the image-side surface of the fourth isolation member P4 and the object-side surface of the fifth lens E5. Figure 4C As shown, the optical imaging lens 2003 also includes a third auxiliary isolation member P3b placed between the image side of the third isolation member P3 and the object side of the fourth lens E4.

[0095] Table 6 shows the basic parameters of the lenses, spacers, and lens barrels of optical imaging lenses 2001, 2002, and 2003 of Embodiment 2. The unit of each parameter in Table 6 is millimeters (mm).

[0096] Example parameters Optical Imaging Lens 2001 Optical Imaging Lens 2002 Optical Imaging Lens 2003 d2s 1.786 1.804 1.800 d2m 1.748 1.748 1.748 D2m 4.235 3.600 3.500 d3s 2.382 2.353 2.370 D3m 5.340 4.560 4.273 d0s 3.660 3.651 3.727 d0m 6.213 6.313 6.140 EP01 0.770 0.562 0.509 CP1 0.012 0.016 0.015 EP12 0.378 0.365 0.371 CP2 0.019 0.028 0.026 EP23 0.504 0.344 0.344 CP3 0.030 0.227 0.246 L 3.700 3.540 3.460 D0m 6.589 6.729 6.689 DT22 0.7882 0.7882 0.7882 DT32 1.0036 1.0036 1.0036

[0097] Table 6

[0098] Figure 5A The on-axis chromatic aberration curves of optical imaging lenses 2001, 2002 and 2003 of Embodiment 2 are shown, which indicate the deviation of the focal point of light of different wavelengths after passing through the lens. Figure 5B The astigmatism curves of optical imaging lenses 2001, 2002 and 2003 of Embodiment 2 are shown, which represent the meridional image plane curvature and the sagittal image plane curvature. Figure 5C The distortion curves of optical imaging lenses 2001, 2002 and 2003 of Embodiment 2 are shown, which represent the distortion magnitude values ​​corresponding to different field of view angles. Figure 5D The magnification chromatic aberration curves of optical imaging lenses 2001, 2002, and 2003 of Embodiment 2 are shown, representing the deviations in image height at different points on the imaging plane after light passes through the lenses. According to... Figures 5A to 5D It can be seen that the optical imaging lens 2001, optical imaging lens 2002 and optical imaging lens 2003 given in Example 2 can achieve good imaging quality.

[0099] Example 3

[0100] The following is for reference Figures 6A to 7D The optical imaging lens 3001, optical imaging lens 3002 and optical imaging lens 3003 according to Embodiment 3 of this application are described. Figures 6A to 6C Schematic diagrams of the optical imaging lens 3001, optical imaging lens 3002 and optical imaging lens 3003 according to Embodiment 3 of this application are shown respectively.

[0101] like Figures 6A to 6CAs shown, optical imaging lenses 3001, 3002 and 3003 each include a lens barrel P0, imaging lens groups E1 to E5 and multiple isolation components P1 to P4.

[0102] like Figures 6A to 6C As shown, optical imaging lenses 3001, 3002, and 3003 employ the same imaging lens group, which, from the object side to the image side, sequentially includes: 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 positive optical power and has an object-side surface S1 and an image-side surface S2. The second lens E2 has positive optical power and has an object-side surface S3 and an image-side surface S4. The third lens E3 has positive optical power and has an object-side surface S5 and an image-side surface S6. The fourth lens E4 has positive optical power and has an object-side surface S7 and an image-side surface S8. The fifth lens E5 has negative optical power and has an object-side surface S9 and an image-side surface S10. A filter (not shown) has an object-side surface S11 (not shown) and an image-side surface S12 (not shown). Light from the object passes sequentially through surfaces S1 to S12 and is finally imaged onto the imaging surface S13 (not shown).

[0103] In this example, optical imaging lenses 3001, 3002, and 3003 also have the following basic parameters: the effective focal length f of optical imaging lenses 3001, 3002, and 3003 is 3.72 mm, and the maximum semi-FOV of optical imaging lenses 3001, 3002, and 3003 is 37.29°.

[0104] Table 7 shows the basic parameters of the imaging lens groups of optical imaging lenses 3001, 3002, and 3003 in Embodiment 3, wherein the units of radius of curvature, thickness, and focal length are millimeters (mm). Tables 8-1 and 8-2 show the higher-order coefficients that can be used for each aspherical mirror in Embodiment 3, wherein each aspherical surface shape can be defined by formula (1) given in Embodiment 1 above.

[0105]

[0106]

[0107] Table 7

[0108] Face number A4 A6 A8 A10 A12 A14 A16 S1 -8.06E-03 5.47E-03 1.40E-01 -1.67E+00 8.59E+00 -2.67E+01 5.50E+01 S2 7.07E-03 1.94E-01 -7.55E-01 1.63E+00 -2.29E+00 2.11E+00 -1.22E+00 S3 -7.81E-02 4.70E-01 -3.56E+00 3.37E+01 -2.57E+02 1.43E+03 -5.81E+03 S4 -5.69E-02 1.45E-01 7.90E-01 -6.07E+00 2.13E+01 -3.57E+01 2.43E+01 S5 -1.30E-01 -2.94E-02 -2.29E-01 7.57E-01 -1.99E+00 2.52E+00 0.00E+00 S6 -1.78E-01 3.91E-02 -7.51E-01 2.90E+00 -7.10E+00 1.05E+01 -8.77E+00 S7 -1.27E-01 1.14E-01 -3.78E-01 -9.83E-01 7.88E+00 -2.28E+01 3.87E+01 S8 -1.26E-01 3.48E-01 -1.42E+00 4.53E+00 -1.21E+01 2.53E+01 -3.89E+01 S9 -5.05E-01 6.32E-01 -9.81E-01 1.52E+00 -1.89E+00 1.72E+00 -1.13E+00 S10 -5.33E-01 7.79E-01 -1.22E+00 1.62E+00 -1.68E+00 1.29E+00 -7.38E-01

[0109] Table 8-1

[0110] Face number A18 A20 A22 A24 A26 A28 A30 S1 -7.83E+01 7.85E+01 -5.51E+01 2.66E+01 -8.38E+00 1.56E+00 -1.29E-01 S2 4.00E-01 -5.65E-02 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 S3 1.73E+04 -3.80E+04 6.03E+04 -6.71E+04 4.96E+04 -2.18E+04 4.32E+03 S4 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 S5 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 S6 3.35E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 S7 -4.19E+01 2.94E+01 -1.31E+01 3.35E+00 -3.77E-01 0.00E+00 0.00E+00 S8 4.32E+01 -3.44E+01 1.92E+01 -7.33E+00 1.82E+00 -2.63E-01 1.68E-02 S9 5.38E-01 -1.86E-01 4.65E-02 -8.25E-03 9.88E-04 -7.18E-05 2.39E-06 S10 3.12E-01 -9.64E-02 2.15E-02 -3.37E-03 3.50E-04 -2.16E-05 6.02E-07

[0111] Table 8-2

[0112] like Figures 6A to 6C As shown, the optical imaging lenses 3001, 3002, and 3003 each include a first isolation member P1, a second isolation member P2, a third isolation member P3, and a fourth isolation member P4. Specifically, the first isolation member P1 is disposed between the first lens E1 and the second lens E2 and contacts the image-side surface of the first lens E1; the second isolation member P2 is disposed between the second lens E2 and the third lens E3 and contacts the image-side surface of the second lens E2; the third isolation member P3 is disposed between the third lens E3 and the fourth lens E4 and contacts the image-side surface of the third lens E3; and the fourth isolation member P4 is disposed between the fourth lens E4 and the fifth lens E5 and contacts the image-side surface of the fourth lens E4. These isolation members can block excess external light from entering, allowing the lenses to better contact the lens barrel and enhancing the structural stability of the optical imaging lenses 3001, 3002, and 3003.

[0113] like Figures 6A to 6C As shown, optical imaging lenses 3001, 3002 and 3003 also include a third auxiliary isolation member P3b placed between the image side of the third isolation member P3 and the object side of the fourth lens E4, and a fourth auxiliary isolation member P4b placed between the image side of the fourth isolation member P4 and the object side of the fifth lens E5.

[0114] Table 9 shows the basic parameters of the lenses, spacers, and lens barrels of optical imaging lenses 3001, 3002, and 3003 in Embodiment 3. The unit of each parameter in Table 9 is millimeters (mm).

[0115] Example parameters Optical Imaging Mirror 3001 Optical Imaging Lens 3002 Optical Imaging Lens 3003 d2s 1.223 1.269 1.301 d2m 1.169 1.233 1.222 D2m 4.200 3.398 2.863 d3s 2.162 2.641 2.368 D3m 4.240 4.240 4.080 d0s 3.332 3.664 3.212 d0m 5.820 5.584 5.431 EP01 0.672 0.888 0.582 CP1 0.022 0.018 0.022 EP12 0.286 0.316 0.313 CP2 0.016 0.018 0.016 EP23 0.337 0.390 0.337 CP3 0.313 0.261 0.384 L 3.434 3.678 3.371 D0m 6.020 5.784 5.631 DT22 0.5912 0.5912 0.5912 DT32 0.884 0.884 0.884

[0116] Table 9

[0117] Figure 7A The on-axis chromatic aberration curves of optical imaging lenses 3001, 3002 and 3003 of Embodiment 3 are shown, which indicate the deviation of the focal point of light of different wavelengths after passing through the lens. Figure 7B The astigmatism curves of optical imaging lenses 3001, 3002 and 3003 of Embodiment 3 are shown, which represent the meridional image plane curvature and the sagittal image plane curvature. Figure 7C The distortion curves of optical imaging lenses 3001, 3002 and 3003 of Embodiment 3 are shown, which represent the distortion magnitude values ​​corresponding to different field of view angles. Figure 7DThe magnification chromatic aberration curves of optical imaging lenses 3001, 3002, and 3003 of Embodiment 3 are shown, representing the deviations in image height at different points on the imaging plane after light passes through the lenses. According to... Figures 7A to 7D It can be seen that the optical imaging lens 3001, optical imaging lens 3002 and optical imaging lens 3003 given in Example 3 can achieve good imaging quality.

[0118] In summary, the optical imaging lenses 1001, 1002, 1003, 2001, 2002, 2003, 3001, 3002 and 3003 of Examples 1 to 3 satisfy the relationship shown in Table 10.

[0119]

[0120]

[0121] Table 10

[0122] This application also provides an imaging device, wherein the 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 optical imaging lens described above.

[0123] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. An optical imaging lens, characterized in that, include: An imaging lens group consists of a first lens with positive optical power, a second lens with positive optical power, a third lens with positive optical power, a fourth lens with positive optical power, and a fifth lens with negative optical power, arranged sequentially along the optical axis from the object side to the image side. Among the lenses with a refractive index less than 1.65 in the imaging lens group, there are three lenses with positive optical power. The fifth lens in the imaging lens group has the smallest absolute value of effective focal length. A plurality of spacers, including a second spacer positioned between the second lens and the third lens and abutting the image-side surface of the second lens, and a third spacer positioned between the third lens and the fourth lens and abutting the image-side surface of the third lens; and A lens barrel for housing the imaging lens group and the plurality of spacers; The optical imaging lens has five lenses with optical power. The object side of the first lens is convex; The object side of the second lens is convex, and the image side is concave. The image-side surface of the third lens is convex. The effective focal length f3 of the third lens, the effective focal length f2 of the second lens, and the spacing EP23 between the second and third isolators along the optical axis satisfy: 7.33 ≤ |f3 - |f2|| / EP23 ≤ 29.76; and The outer diameter D0m of the image-side end of the lens barrel and the radius of curvature R10 of the image-side surface of the fifth lens satisfy the following condition: 1.76≤|D0m / R10|≤4.

97.

2. The optical imaging lens according to claim 1, characterized in that, The plurality of isolation members further includes a first isolation member disposed between the first lens and the second lens and abutting the image side of the first lens, and a fourth isolation member disposed between the fourth lens and the fifth lens and abutting the image side of the fourth lens.

3. The optical imaging lens according to claim 2, characterized in that, The optical imaging lens further includes at least one of a third auxiliary isolation member disposed between the image side of the third isolation member and the object side of the fourth lens, and a fourth auxiliary isolation member disposed between the image side of the fourth isolation member and the object side of the fifth lens.

4. The optical imaging lens according to claim 1, characterized in that, The radius of curvature R4 of the image side surface of the second lens, the radius of curvature R6 of the image side surface of the third lens, the maximum thickness CP2 of the second isolator along the optical axis, and the maximum thickness CP3 of the third isolator along the optical axis satisfy the following: -107.43mm≤(R4×R6) / CP2 / 10≤-24.23mm, and -68.04mm≤(R4×R6) / CP3 / 10≤-1.98mm.

5. The optical imaging lens according to claim 1, characterized in that, The air gap T23 between the second and third lenses on the optical axis, the maximum thickness CP2 of the second isolator along the optical axis, the maximum thickness CP3 of the third isolator along the optical axis, and the air gap T34 between the third and fourth lenses on the optical axis satisfy: 8.15≤T23 / CP2+CP3 / T34≤21.

30.

6. The optical imaging lens according to claim 1, characterized in that, The maximum height L of the lens barrel along the optical axis, the effective focal length f of the optical imaging lens, and the maximum semi-field of view (Semi-FOV) of the optical imaging lens satisfy the following condition: 1.12 ≤ L / (f × tan(Semi-FOV)) ≤ 1.

30.

7. The optical imaging lens according to claim 2, characterized in that, The distance TD from the object side of the first lens to the image side of the fifth lens on the optical axis, the interval EP23 between the second and third isolation members along the optical axis, and the interval EP12 between the first and second isolation members along the optical axis satisfy: 3.55≤TD / (EP23+EP12)≤5.

67.

8. The optical imaging lens according to claim 2, characterized in that, The radius of curvature R3 of the object side of the second lens, the radius of curvature R4 of the image side of the second lens, the maximum thickness CP1 of the first isolator along the optical axis and the maximum thickness CP2 of the second isolator along the optical axis satisfy: 6.63≤(R3+R4) / (CP1+CP2) / 10≤20.

83.

9. The optical imaging lens according to claim 1, characterized in that, The effective focal length f of the optical imaging lens, the inner diameter d0m of the image-side end of the lens barrel, and the inner diameter d0s of the object-side end of the lens barrel satisfy the following condition: 4.28 mm. 2 ≤f×(d0m-d0s)≤10.84mm 2 .

10. The optical imaging lens according to claim 1, characterized in that, The outer diameter D3m of the image side of the third isolator, the outer diameter D2m of the image side of the second isolator, the maximum effective radius DT32 of the image side of the third lens, and the maximum effective radius DT22 of the image side of the second lens satisfy the following: 0.14≤(D3m-D2m) / (DT32-DT22)≤5.

13.

11. The optical imaging lens according to claim 1, characterized in that, The radius of curvature R4 of the image side of the second lens, the radius of curvature R6 of the image side of the third lens, the inner diameter d3s of the object side of the third isolator and the inner diameter d2m of the image side of the second isolator satisfy: 4.46≤(R4-R6) / (d3s-d2m)≤25.

10.

12. The optical imaging lens according to claim 1, characterized in that, The radius of curvature R4 of the image side of the second lens, the radius of curvature R6 of the image side of the third lens, the inner diameter d3s of the object side of the third isolator and the inner diameter d2s of the object side of the second isolator satisfy: -7.86≤R6 / R4+d3s / d2s≤-0.

51.

13. The optical imaging lens according to claim 11, characterized in that, The distance EP23 between the second and third isolation members along the optical axis, the refractive index N2 of the second lens and the refractive index N3 of the third lens satisfy: 2.94mm≤EP23 / (N2-N3)≤10.81mm.

14. The optical imaging lens according to claim 2, characterized in that, The maximum height L of the lens barrel along the optical axis, the distance EP01 from the object side end of the lens barrel to the object side of the first isolator on the optical axis, and the sum of the air gaps ∑AT of any two adjacent lenses from the first lens to the fifth lens on the optical axis satisfy: 5.16mm≤L / EP01×∑AT≤10.46mm.

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