Optical imaging lens

Abstract

The application discloses an optical imaging lens, which comprises, in sequence from the object side to the image side along the optical axis, a first lens with positive refractive power, the object side of which is a convex surface, and the image side of which is a plane; a variable diaphragm; a second lens with negative refractive power, the object side of which is a convex surface, and the image side of which is a concave surface; a third lens with negative refractive power, the object side of which is a convex surface, and the image side of which is a concave surface; a fourth lens with positive refractive power, the object side and the image side of which are both convex surfaces; a fifth lens, the object side of which is a convex surface, and the image side of which is a concave surface; a sixth lens with positive refractive power, the object side of which is a convex surface, and the image side of which is a concave surface; and a seventh lens with negative refractive power, the object side of which is a convex surface, and the image side of which is a concave surface; the first lens is a glass lens, and the image side of the first lens is a spherical mirror surface; the optical imaging lens has seven lenses with refractive power; and the combined focal length f12 of the first lens and the second lens and the combined focal length f34 of the third lens and the fourth lens satisfy the condition: 2.9 < f34 / f12 ≤ 4.78.

Description

[0001] Divisional application

[0002] This application is a divisional application of Chinese invention patent application filed on November 19, 2020, entitled "Optical Imaging Lens" and with application number 202011305071.4. 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, with the rapid development of portable electronic products such as smartphones, their shooting functions have become increasingly powerful, and the shooting effects have become better and better. Due to their small size, light weight, and portability, the video and photography industries are increasingly inclined to use smartphones and other portable electronic products as their main shooting tools.

[0005] Currently, mobile phone photography is not only used to record people's daily lives, but has also become widely used in brand promotion copywriting. At the same time, with the development of the mobile phone photography industry, the market has placed higher demands on mobile phone lenses. Traditional mobile phone lenses cannot simultaneously achieve a long depth of field when shooting distant scenes, while maintaining clear detail when shooting close-ups. Therefore, how to meet the needs of different shooting scenarios while maintaining lens miniaturization is one of the pressing challenges that many lens designers need to solve. Summary of the Invention

[0006] This application provides an optical imaging lens comprising, along the optical axis from the object side to the image side, a first lens, a variable aperture, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens in sequence. The first lens has positive optical power, with a convex object side and a flat image side. The second lens has negative optical power, with a convex object side and a concave image side. The third lens has negative optical power, with a convex object side and a concave image side. The fourth lens has positive optical power, with a convex object side and a convex image side. The fifth lens has optical power, with a convex object side and a concave image side. The sixth lens has positive optical power, with a convex object side and a concave image side. The seventh lens has negative optical power, with a convex object side and a concave image side. The first lens is made of glass, and its image side is a spherical mirror. The optical imaging lens comprises seven lenses with optical power. The combined focal length f12 of the first and second lenses and the combined focal length f34 of the third and fourth lenses satisfy the following condition: 2.9 < f34 / f12 ≤ 4.78.

[0007] In one embodiment, the effective focal length f2 of the second lens, the effective focal length f3 of the third lens, and the effective focal length f7 of the seventh lens satisfy: 1.4≤f3 / (f2+f7)≤1.59.

[0008] In one embodiment, the effective focal length f4 of the fourth lens and the radius of curvature R7 of the object side surface of the fourth lens satisfy: 1.3 < f4 / R7 < 1.6.

[0009] In one embodiment, the radius of curvature R12 of the image side of the sixth lens, the radius of curvature R11 of the object side of the sixth lens, and the effective focal length f6 of the sixth lens satisfy: 1.27≤(R11+R12) / f6≤1.63.

[0010] In one embodiment, the radius of curvature R3 of the object side of the second lens and the radius of curvature R4 of the image side of the second lens satisfy: 1.9 < R3 / R4 ≤ 2.13.

[0011] In one embodiment, the radius of curvature R5 of the object side of the third lens and the radius of curvature R6 of the image side of the third lens satisfy: 1.5 < R5 / R6 ≤ 1.6.

[0012] In one embodiment, the center thickness CT1 of the first lens on the optical axis, the center thickness CT2 of the second lens on the optical axis, the center thickness CT3 of the third lens on the optical axis, the spacing T12 between the first lens and the second lens on the optical axis, and the spacing T23 between the second lens and the third lens on the optical axis satisfy: 0.9 < (CT1 + T12) / (CT2 + T23 + CT3) ≤ 1.

[0013] In one embodiment, the effective radius DT31 of the object side of the third lens, the effective radius DT32 of the image side of the third lens, and the effective radius DT11 of the object side of the first lens satisfy: 1.72≤(DT31+DT32) / DT11≤1.77.

[0014] In one embodiment, the combined focal length f56 of the fifth and sixth lenses, the center thickness CT5 of the fifth lens on the optical axis, and the center thickness CT6 of the sixth lens on the optical axis satisfy: 6.61≤f56 / (CT5+CT6)<7.1.

[0015] In one embodiment, the distance SAG52 from the intersection of the image-side surface of the fifth lens and the optical axis to the effective radius vertex of the image-side surface of the fifth lens on the optical axis, the distance SAG51 from the intersection of the object-side surface of the fifth lens and the optical axis to the effective radius vertex of the object-side surface of the fifth lens on the optical axis, the distance SAG72 from the intersection of the image-side surface of the seventh lens and the optical axis to the effective radius vertex of the image-side surface of the seventh lens on the optical axis, and the distance SAG71 from the intersection of the object-side surface of the seventh lens and the optical axis to the effective radius vertex of the object-side surface of the seventh lens on the optical axis satisfy: 1.2≤(SAG71+SAG72) / (SAG51+SAG52)≤1.7.

[0016] In one embodiment, the maximum entrance pupil diameter EPDmax of the optical imaging lens, the minimum entrance pupil diameter EPDmin of the optical imaging lens, and the effective focal length f1 of the first lens satisfy: 4.21≤f1 / (EPDmax-EPDmin)≤4.31.

[0017] This application employs multiple (e.g., seven) lenses. By rationally allocating the optical power, surface shape, center thickness of each lens, and on-axis spacing between each lens, the aforementioned optical imaging lens achieves at least one beneficial effect such as miniaturization, compact structure, variable aperture, and high imaging quality. Attached Figure Description

[0018] 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:

[0019] Figure 1 A schematic diagram of the structure of an optical imaging lens with an aperture value of 1.39 according to Embodiment 1 of this application is shown;

[0020] Figure 2 A schematic diagram of the structure of an optical imaging lens with an aperture value of 2.04 according to Embodiment 1 of this application is shown;

[0021] Figures 3A to 3C The on-axis chromatic aberration curve, astigmatism curve, and distortion curve of the optical imaging lens with an aperture of f / 1.39 in Example 1 are shown respectively.

[0022] Figures 4A to 4C The on-axis chromatic aberration curve, astigmatism curve, and distortion curve of the optical imaging lens with an aperture of f / 2.04 in Example 1 are shown respectively.

[0023] Figure 5 A schematic diagram of the structure of an optical imaging lens with an aperture value of 1.39 according to Embodiment 2 of this application is shown;

[0024] Figure 6A schematic diagram of the structure of an optical imaging lens with an aperture value of 2.05 according to Embodiment 2 of this application is shown;

[0025] Figures 7A to 7C The on-axis chromatic aberration curve, astigmatism curve, and distortion curve of the optical imaging lens with an aperture of f / 1.39 in Example 2 are shown respectively.

[0026] Figures 8A to 8C The on-axis chromatic aberration curve, astigmatism curve, and distortion curve of the optical imaging lens with an aperture of f / 2.05 in Example 2 are shown respectively.

[0027] Figure 9 A schematic diagram of the structure of an optical imaging lens with an aperture value of 1.39 according to Embodiment 3 of this application is shown;

[0028] Figure 10 A schematic diagram of the structure of an optical imaging lens with an aperture value of 2.04 according to Embodiment 3 of this application is shown;

[0029] Figures 11A to 11C The on-axis chromatic aberration curve, astigmatism curve, and distortion curve of the optical imaging lens with an aperture of f / 1.39 in Example 3 are shown respectively.

[0030] Figures 12A to 12C The on-axis chromatic aberration curve, astigmatism curve, and distortion curve of the optical imaging lens with an aperture of f / 2.04 in Example 3 are shown respectively.

[0031] Figure 13 A schematic diagram of the structure of an optical imaging lens with an aperture value of 1.39 according to Embodiment 4 of this application is shown;

[0032] Figure 14 A schematic diagram of the structure of an optical imaging lens with an aperture value of 2.04 according to Embodiment 4 of this application is shown;

[0033] Figures 15A to 15C The on-axis chromatic aberration curve, astigmatism curve, and distortion curve of the optical imaging lens with an aperture of f / 1.39 in Example 4 are shown respectively.

[0034] Figures 16A to 16C The on-axis chromatic aberration curve, astigmatism curve, and distortion curve of the optical imaging lens with an aperture of f / 2.04 in Example 4 are shown respectively.

[0035] Figure 17 A schematic diagram of the structure of an optical imaging lens with an aperture value of 1.40 according to Embodiment 5 of this application is shown;

[0036] Figure 18 A schematic diagram of the structure of an optical imaging lens with an aperture value of 2.04 according to Embodiment 5 of this application is shown;

[0037] Figures 19A to 19C The on-axis chromatic aberration curve, astigmatism curve, and distortion curve of the optical imaging lens with an aperture of f / 1.40 in Example 5 are shown respectively.

[0038] Figures 20A to 20C The on-axis chromatic aberration curve, astigmatism curve, and distortion curve of the optical imaging lens with an aperture of f / 2.04 in Example 5 are shown respectively.

[0039] Figure 21 A schematic diagram of the structure of an optical imaging lens with an aperture value of 1.40 according to Embodiment 6 of this application is shown;

[0040] Figure 22 A schematic diagram of the structure of an optical imaging lens with an aperture value of 2.05 according to Embodiment 6 of this application is shown;

[0041] Figures 23A to 23C The on-axis chromatic aberration curve, astigmatism curve, and distortion curve of the optical imaging lens with an aperture of f / 1.40 in Example 6 are shown respectively; and

[0042] Figures 24A to 24C The on-axis chromatic aberration curve, astigmatism curve, and distortion curve of the optical imaging lens with an aperture of f / 2.05 in Example 6 are shown respectively. Detailed Implementation

[0043] 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.

[0044] 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 lens or the third lens.

[0045] 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 strictly to scale.

[0046] In this article, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the location of the convexity 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 location of the concaveness is not defined, it means that the lens surface is concave 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.

[0047] 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.

[0048] 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 formal sense unless expressly so specified herein.

[0049] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0050] The features, principles and other aspects of this application are described in detail below.

[0051] An optical imaging lens according to an exemplary embodiment of this application may include seven lenses with optical power, namely a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens. These seven lenses are arranged sequentially along the optical axis from the object side to the image side. Any two adjacent lenses among the first to seventh lenses may have a gap distance.

[0052] In an exemplary embodiment, the first lens may have positive optical power, its object side may be convex, and its image side may be planar; the second lens may have negative optical power; the third lens may have positive or negative optical power; the fourth lens may have positive optical power, and its image side may be convex; the fifth lens may have positive or negative optical power; the sixth lens may have positive optical power; and the seventh lens may have negative optical power.

[0053] In an exemplary embodiment, the optical imaging lens according to this application further includes a variable aperture disposed between the first lens and the second lens. For example... Figure 1 and Figure 2 As shown, the optical imaging lens is equipped with a variable aperture STO, which can achieve the effect of continuously changing the aperture value of the optical imaging lens, giving the lens a large range of aperture value variation.

[0054] In an exemplary embodiment, the first lens has positive optical power, which can effectively converge light. The object-side surface of the first lens is convex, while the image-side surface is flat, which helps to ensure that light can stably enter the optical imaging lens. Furthermore, the flat image-side surface of the first lens can fit well with the aperture stop. By rationally allocating the optical power and surface shape of the second to seventh lenses, the structure of the optical lens can be made more compact, and the light transmission can be made smoother.

[0055] In an exemplary embodiment, the first lens may be a glass lens; at least one of the second to seventh lenses may be a plastic lens. Using a glass lens as the first lens allows the optical imaging lens of this application to be composed of a combination of glass and plastic lenses, thereby improving the lens's optical performance.

[0056] In an exemplary embodiment, the image-side surface of the first lens can be a spherical mirror. This allows the variable aperture to move stably at the image-side surface of the first lens, ensuring strong stability of the lens during aperture switching.

[0057] In the 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 seventh 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 a spherical lens, which has a constant curvature from the center to the periphery, an aspherical lens has better radius of curvature characteristics, and has the advantages of improving distortion aberrations and astigmatism aberrations. By using an aspherical lens, aberrations occurring during imaging can be eliminated as much as possible, thereby improving image quality. Optionally, at least one of the object-side and image-side surfaces of each of the first, second, third, fourth, fifth, sixth, and seventh lenses is an aspherical mirror surface. Optionally, the object-side surface of the first lens and the object-side and image-side surfaces of each of the second, third, fourth, fifth, sixth, and seventh lenses are all aspherical mirror surfaces.

[0058] In an exemplary embodiment, the object-side surface of the fifth lens can be convex, and the image-side surface can be concave. This surface configuration of the fifth lens ensures smooth light transmission and avoids lens instability caused by excessively steep light transmission paths. Furthermore, given a certain overall length of the lens, this surface configuration of the fifth lens also helps to increase the lens's imaging surface.

[0059] In an exemplary embodiment, the object-side surface of the sixth lens can be convex, and the image-side surface can be concave. This surface configuration of the sixth lens ensures smooth light transmission and avoids lens instability caused by excessively steep light transmission paths. Furthermore, given a certain overall length of the lens, this surface configuration of the sixth lens also helps to increase the imaging surface area of ​​the lens.

[0060] In an exemplary embodiment, the optical imaging lens according to this application satisfies: 4.0 < f1 / (EPDmax - EPDmin) < 5.0, where EPDmax is the maximum entrance pupil diameter of the optical imaging lens, EPDmin is the minimum entrance pupil diameter of the optical imaging lens, and f1 is the effective focal length of the first lens. More specifically, f1, EPDmax, and EPDmin further satisfy: 4.1 < f1 / (EPDmax - EPDmin) < 4.4. Satisfying 4.0 < f1 / (EPDmax - EPDmin) < 5.0 allows the optical imaging lens to have good imaging performance at both large and small apertures.

[0061] In an exemplary embodiment, the optical imaging lens according to this application satisfies: 1.0 < f3 / (f2+f7) < 2.0, where f2 is the effective focal length of the second lens, f3 is the effective focal length of the third lens, and f7 is the effective focal length of the seventh lens. More specifically, f3, f2, and f7 can further satisfy: 1.3 < f3 / (f2+f7) < 1.7. Satisfying 1.0 < f3 / (f2+f7) < 2.0 is beneficial for comprehensively correcting the spherical aberration caused by the three lenses by changing the contribution of spherical aberration among the third, second, and seventh lenses.

[0062] In an exemplary embodiment, the optical imaging lens according to this application satisfies: 1.2 < f4 / R7 < 1.7, where f4 is the effective focal length of the fourth lens and R7 is the radius of curvature of the object-side surface of the fourth lens. More specifically, f4 and R7 can further satisfy: 1.3 < f4 / R7 < 1.6. Satisfying 1.2 < f4 / R7 < 1.7 allows for a reasonable setting of the shape of the fourth lens, reducing spherical aberration caused by the fourth lens. Furthermore, by changing the shape of the fourth lens, it can be combined with the third lens to comprehensively correct chromatic aberration of the lens.

[0063] In an exemplary embodiment, the optical imaging lens according to this application satisfies: 1.2 < (R11 + R12) / f6 < 1.7, where R12 is the radius of curvature of the image-side surface of the sixth lens, R11 is the radius of curvature of the object-side surface of the sixth lens, and f6 is the effective focal length of the sixth lens. Satisfying 1.2 < (R11 + R12) / f6 < 1.7 is beneficial for optimizing the edge angle of the sixth lens, thereby preventing abnormal or erroneous light transmission by controlling the edge angle of the sixth lens. It also facilitates the rational setting of the shape of the sixth lens to reduce the field curvature of the lens and minimize the phenomenon of misalignment between the inner and outer edges of the field curvature.

[0064] In an exemplary embodiment, the optical imaging lens according to this application satisfies: 1.8 < R3 / R4 < 2.3, where R3 is the radius of curvature of the object-side surface of the second lens, and R4 is the radius of curvature of the image-side surface of the second lens. More specifically, R3 and R4 can further satisfy: 1.9 < R3 / R4 < 2.2. Satisfying 1.8 < R3 / R4 < 2.3 allows for a reasonable setting of the optical power of the second lens, thereby indirectly allocating the optical power to ensure a smooth transition of light transmitted through the first lens, ultimately reducing the overall aberration of the lens.

[0065] In an exemplary embodiment, the optical imaging lens according to this application satisfies: 1.4 < R5 / R6 < 2.0, where R5 is the radius of curvature of the object-side surface of the third lens, and R6 is the radius of curvature of the image-side surface of the third lens. More specifically, R5 and R6 can further satisfy: 1.5 < R5 / R6 < 1.7. Satisfying 1.4 < R5 / R6 < 2.0 allows for a reasonable setting of the optical power of the third lens, optimizes the shape of the third lens, and can be combined with the second lens to reduce spherical aberration and coma.

[0066] In an exemplary embodiment, the optical imaging lens according to this application satisfies: 0.8 < (CT1 + T12) / (CT2 + T23 + CT3) < 1.2, where CT1 is the center thickness of the first lens on the optical axis, 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, T12 is the distance between the first and second lenses on the optical axis, and T23 is the distance between the second and third lenses on the optical axis. More specifically, CT1, T12, CT2, T23, and CT3 further satisfy: 0.9 < (CT1 + T12) / (CT2 + T23 + CT3) < 1.1. Satisfying 0.8 < (CT1 + T12) / (CT2 + T23 + CT3) < 1.2 allows for the reduction of overall field curvature and spherical aberration of the lens by controlling the parameters of the lenses from the first to the third lens, and also helps to reduce the sensitivity of the lens.

[0067] In an exemplary embodiment, the optical imaging lens according to this application satisfies: 1.6 < (DT31 + DT32) / DT11 < 2.0, where DT31 is the effective radius of the object-side surface of the third lens, DT32 is the effective radius of the image-side surface of the third lens, and DT11 is the effective radius of the object-side surface of the first lens. More specifically, DT31, DT32, and DT11 further satisfy: 1.6 < (DT31 + DT32) / DT11 < 1.8. Satisfying 1.6 < (DT31 + DT32) / DT11 < 2.0 helps the light to continue to be transmitted stably after being converged by the first lens, and at the same time helps to reduce the step difference between the first and third lenses, reduce the sensitivity of the lens, and improve the yield of the optical imaging lens.

[0068] In an exemplary embodiment, the optical imaging lens according to this application satisfies: 2.9 < f34 / f12 < 4.9, where f12 is the combined focal length of the first and second lenses, and f34 is the combined focal length of the third and fourth lenses. Satisfying 2.9 < f34 / f12 < 4.9 allows for a reasonable allocation of optical power from the first to the fourth lenses, reducing lens aberrations and improving the lens's optical performance.

[0069] In an exemplary embodiment, the optical imaging lens according to this application satisfies: 6.5 < f56 / (CT5+CT6) < 7.5, where f56 is the combined focal length of the fifth and sixth lenses, CT5 is the center thickness of the fifth lens on the optical axis, and CT6 is the center thickness of the sixth lens on the optical axis. More specifically, f56, CT5, and CT6 further satisfy: 6.5 < f56 / (CT5+CT6) < 7.1. Satisfying 6.5 < f56 / (CT5+CT6) < 7.5 is beneficial for comprehensively allocating the relationship between the optical power and center thickness of the fifth and sixth lenses, and also helps to reduce spherical aberration and field curvature.

[0070] In an exemplary embodiment, the optical imaging lens according to this application satisfies: 1.1 < (SAG71 + SAG72) / (SAG51 + SAG52) < 1.8, where SAG52 is the distance on the optical axis from the intersection of the image-side surface of the fifth lens and the optical axis to the vertex of the effective radius of the image-side surface of the fifth lens; SAG51 is the distance on the optical axis from the intersection of the object-side surface of the fifth lens and the optical axis to the vertex of the effective radius of the object-side surface of the fifth lens; SAG72 is the distance on the optical axis from the intersection of the image-side surface of the seventh lens and the optical axis to the vertex of the effective radius of the image-side surface of the seventh lens; and SAG71 is the distance on the optical axis from the intersection of the object-side surface of the seventh lens and the optical axis to the vertex of the effective radius of the object-side surface of the seventh lens. Satisfying 1.1 < (SAG71 + SAG72) / (SAG51 + SAG52) < 1.8 is beneficial for reducing the ghosting phenomenon generated by the fifth and seventh lenses, and also for reasonably setting the shape of the fifth and seventh lenses, reducing lens distortion, astigmatism, and field curvature.

[0071] In an exemplary embodiment, the optical imaging lens according to this application may further include a filter for correcting color deviation and / or a protective glass for protecting the photosensitive element located on the imaging surface.

[0072] The optical imaging lens according to the above embodiments of this application can employ multiple lenses, such as the seven lenses described above. By rationally allocating the optical power, surface shape, center thickness of each lens, and on-axis spacing between each lens, the size of the optical imaging lens can be effectively reduced and its manufacturability improved, making the optical imaging lens more conducive to production and suitable for portable electronic products. The optical imaging lens configured as described above features ultra-thinness, large image plane, variable aperture, compact structure, miniaturization, and good image quality, which can well meet the usage needs of various portable electronic products in imaging scenarios.

[0073] However, those skilled in the art will understand that the number of lenses constituting the optical imaging lens can be varied to obtain the various results and advantages described herein without departing from the technical solutions claimed in this application. For example, although seven lenses are described as an example in the embodiments, the optical imaging lens is not limited to including seven lenses. If desired, the optical imaging lens may also include other numbers of lenses.

[0074] 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.

[0075] Example 1

[0076] The following is for reference Figures 1 to 4C Describes an optical imaging lens according to Embodiment 1 of this application. Figure 1 and Figure 2 Schematic diagrams of optical imaging lenses with aperture values ​​of 1.39 and 2.04 according to Embodiment 1 of this application are shown respectively.

[0077] like Figure 1 and Figure 2 As shown, the optical imaging lens includes, from the object side to the image side, the following components in sequence: first lens E1, variable aperture STO, second lens E2, third lens E3, fourth lens E4, fifth lens E5, sixth lens E6, seventh lens E7, filter E8, and imaging surface S17.

[0078] The first lens E1 has positive optical power, with its object-side surface S1 being convex and its image-side surface S2 being flat. The second lens E2 has negative optical power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens E3 has negative optical power, with its object-side surface S5 being convex and its image-side surface S6 being concave. The fourth lens E4 has positive optical power, with its object-side surface S7 being convex and its image-side surface S8 being convex. The fifth lens E5 has negative optical power, with its object-side surface S9 being convex and its image-side surface S10 being concave. The sixth lens E6 has positive optical power, with its object-side surface S11 being convex and its image-side surface S12 being concave. The seventh lens E7 has negative optical power, with its object-side surface S13 being convex and its image-side surface S14 being concave. The filter E8 has an object-side surface S15 and an image-side surface S16. Light from the object passes sequentially through surfaces S1 to S16 and is finally imaged onto the imaging surface S17.

[0079] Table 1 shows the basic parameters of the optical imaging lens of Example 1, where the units for radius of curvature, thickness / distance, and focal length are all millimeters (mm).

[0080]

[0081]

[0082] Table 1

[0083] In this example, the total effective focal length f of the optical imaging lens is 4.86 mm, the total length TTL of the optical imaging lens (the distance on the optical axis from the object side surface S1 of the first lens E1 to the imaging surface S17 of the optical imaging lens) is 6.55 mm, half the diagonal length ImgH of the effective pixel area on the imaging surface of the optical imaging lens is 4.18 mm, the minimum F-number FNOmin of the optical imaging lens is 1.39, and the maximum F-number FNOmax of the optical imaging lens is 2.04. When the F-number is at its minimum, the relative aperture of the optical imaging lens is at its maximum; when the F-number is at its maximum, the relative aperture of the optical imaging lens is at its minimum.

[0084] In Embodiment 1, the object-side surface S1 of the first lens E1 and the object-side surface and image-side surface of any one of the second lens E2 to the seventh lens E7 are aspherical surfaces. The surface shape x of each aspherical lens can be defined using, but is not limited to, the following aspherical formula:

[0085]

[0086] 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 below give the higher-order coefficients A4, A6, A8, A14 that can be used for each aspherical mirror S1, S3-S14 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 .

[0087]

[0088]

[0089] Table 2-1

[0090] Face number A18 A20 A22 A24 A26 A28 A30 S1 9.1568E-02 -3.5792E-02 9.6047E-03 -1.6818E-03 1.7289E-04 -7.9086E-06 0.0000E+00 S3 2.3261E+00 -1.3824E+00 5.8930E-01 -1.7564E-01 3.4742E-02 -4.0962E-03 2.1779E-04 S4 -1.5543E+00 7.2695E-01 -2.1826E-01 3.7973E-02 -2.9082E-03 0.0000E+00 0.0000E+00 S5 3.6014E+00 -2.0018E+00 7.8293E-01 -2.0407E-01 3.1767E-02 -2.2301E-03 0.0000E+00 S6 4.6850E-01 -1.8747E-01 5.1571E-02 -9.2669E-03 9.8109E-04 -4.6681E-05 0.0000E+00 S7 -4.0902E-02 5.5257E-02 -2.6896E-02 7.0816E-03 -9.9463E-04 5.8398E-05 0.0000E+00 S8 -2.0791E+00 1.0588E+00 -3.8601E-01 9.8125E-02 -1.6503E-02 1.6489E-03 -7.4027E-05 S9 1.5189E-01 -6.8635E-02 2.1311E-02 -4.4975E-03 6.1709E-04 -4.9656E-05 1.7776E-06 S10 -2.8708E-02 7.4892E-03 -1.4739E-03 2.1080E-04 -2.0533E-05 1.2094E-06 -3.2316E-08 S11 -6.2389E-03 1.2982E-03 -1.9220E-04 1.9728E-05 -1.3331E-06 5.3292E-08 -9.5408E-10 S12 2.4725E-03 -3.7175E-04 3.9918E-05 -2.9837E-06 1.4727E-07 -4.3069E-09 5.6391E-11 S13 -5.2817E-05 7.6776E-06 -7.3859E-07 4.7447E-08 -1.9661E-09 4.7667E-11 -5.1469E-13 S14 1.5799E-04 -1.7106E-05 1.3309E-06 -7.2512E-08 2.6271E-09 -5.6889E-11 5.5741E-13

[0091] Table 2-2

[0092] Figure 3A and Figure 4A The on-axis chromatic aberration curves of the optical imaging lenses with aperture values ​​of 1.39 and 2.04 in Example 1 are shown respectively, which indicate the deviation of the focal point of light of different wavelengths after passing through the lens. Figure 3B and Figure 4B Astigmatism curves for optical imaging lenses with aperture values ​​of 1.39 and 2.04 in Example 1 are shown, representing meridional and sagittal image plane curvature, respectively. Figure 3C and Figure 4C The distortion curves of the optical imaging lenses with aperture values ​​of f / 1.39 and f / 2.04 in Example 1 are shown respectively, representing the distortion magnitude values ​​corresponding to different image heights. According to... Figures 3A to 4C It can be seen that the optical imaging lens given in Example 1 can achieve good imaging quality.

[0093] Example 2

[0094] The following is for reference Figures 5 to 8C This paper describes an optical imaging lens according to Embodiment 2 of this application. For the sake of brevity, descriptions similar to those in Embodiment 1 will be omitted in this embodiment and the following embodiments. Figure 5 and Figure 6 Schematic diagrams of optical imaging lenses with aperture values ​​of 1.39 and 2.05 according to Embodiment 2 of this application are shown respectively.

[0095] like Figure 5 and Figure 6 As shown, the optical imaging lens includes, from the object side to the image side, the following components in sequence: first lens E1, variable aperture STO, second lens E2, third lens E3, fourth lens E4, fifth lens E5, sixth lens E6, seventh lens E7, filter E8, and imaging surface S17.

[0096] The first lens E1 has positive optical power, with its object-side surface S1 being convex and its image-side surface S2 being flat. The second lens E2 has negative optical power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens E3 has negative optical power, with its object-side surface S5 being convex and its image-side surface S6 being concave. The fourth lens E4 has positive optical power, with its object-side surface S7 being convex and its image-side surface S8 being convex. The fifth lens E5 has negative optical power, with its object-side surface S9 being convex and its image-side surface S10 being concave. The sixth lens E6 has positive optical power, with its object-side surface S11 being convex and its image-side surface S12 being concave. The seventh lens E7 has negative optical power, with its object-side surface S13 being convex and its image-side surface S14 being concave. The filter E8 has an object-side surface S15 and an image-side surface S16. Light from the object passes sequentially through surfaces S1 to S16 and is finally imaged onto the imaging surface S17.

[0097] In this example, the total effective focal length f of the optical imaging lens is 4.86 mm, the total length TTL of the optical imaging lens is 6.55 mm, half the diagonal length of the effective pixel area on the imaging plane of the optical imaging lens, ImgH, is 4.18 mm, the minimum F-number FNOmin of the optical imaging lens is 1.39, and the maximum F-number FNOmax of the optical imaging lens is 2.05. When the F-number is at its minimum, the relative aperture of the optical imaging lens is at its maximum; when the F-number is at its maximum, the relative aperture of the optical imaging lens is at its minimum.

[0098] Table 3 shows the basic parameters of the optical imaging lens of Example 2, wherein the units of radius of curvature, thickness / distance and focal length are millimeters (mm). Tables 4-1 and 4-2 show the higher-order coefficients that can be used for each aspherical mirror in Example 2, wherein each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0099]

[0100] Table 3

[0101] Face number A4 A6 A8 A10 A12 A14 A16 S1 -4.9863E-03 1.8618E-02 -6.4308E-02 1.4308E-01 -2.2263E-01 2.4505E-01 -1.9201E-01 S3 -4.7633E-02 5.1862E-02 -1.8812E-01 6.6047E-01 -1.5630E+00 2.5505E+00 -2.9498E+00 S4 -5.1340E-02 -9.0552E-03 1.6267E-01 -5.9091E-01 1.3235E+00 -1.9754E+00 2.0103E+00 S5 -4.4593E-02 9.1661E-02 -4.6992E-01 1.3295E+00 -2.6039E+00 3.6690E+00 -3.7928E+00 S6 -4.1880E-02 9.3213E-02 -3.0158E-01 6.4702E-01 -1.0113E+00 1.1726E+00 -9.9994E-01 S7 -4.1254E-02 8.4082E-02 -2.1479E-01 4.1800E-01 -5.7148E-01 5.4150E-01 -3.4383E-01 S8 -2.8175E-02 -6.5269E-02 3.4535E-01 -1.0363E+00 2.0416E+00 -2.7913E+00 2.7233E+00 S9 -2.3808E-02 -5.2377E-02 1.0653E-01 -7.1865E-02 -7.1241E-02 2.0706E-01 -2.2799E-01 S10 -2.4718E-02 -2.1143E-01 3.9059E-01 -4.2792E-01 3.3143E-01 -1.9171E-01 8.4645E-02 S11 6.2021E-02 -1.5556E-01 1.6445E-01 -1.4040E-01 9.7666E-02 -5.2568E-02 2.0883E-02 S12 6.8744E-02 1.7348E-02 -1.2803E-01 1.4623E-01 -9.3962E-02 3.9511E-02 -1.1533E-02 S13 -1.6494E-01 6.1667E-02 -2.2956E-02 7.8596E-03 -1.0007E-03 -3.8495E-04 2.1342E-04 S14 -2.5987E-01 1.7241E-01 -1.0525E-01 5.2705E-02 -2.0119E-02 5.6764E-03 -1.1721E-03

[0102] Table 4-1

[0103]

[0104]

[0105] Table 4-2

[0106] Figure 7A and Figure 8A The on-axis chromatic aberration curves of the optical imaging lenses with aperture values ​​of 1.39 and 2.05 in Example 2 are shown respectively, which indicate the deviation of the focal point of light of different wavelengths after passing through the lens. Figure 7B and Figure 8B Astigmatism curves for optical imaging lenses with aperture values ​​of 1.39 and 2.05 in Example 2 are shown, representing meridional and sagittal image plane curvature, respectively. Figure 7C and Figure 8C The distortion curves of the optical imaging lenses with aperture values ​​of f / 1.39 and f / 2.05 in Example 2 are shown respectively, representing the distortion magnitude values ​​corresponding to different image heights. According to... Figures 7A to 8C It can be seen that the optical imaging lens given in Example 2 can achieve good imaging quality.

[0107] Example 3

[0108] The following is for reference Figures 9 to 12C An optical imaging lens according to Embodiment 3 of this application is described. Figure 9 and Figure 10 Schematic diagrams of optical imaging lenses with aperture values ​​of 1.39 and 2.04 according to Embodiment 3 of this application are shown respectively.

[0109] like Figure 9 and Figure 10 As shown, the optical imaging lens includes, from the object side to the image side, the following components in sequence: first lens E1, variable aperture STO, second lens E2, third lens E3, fourth lens E4, fifth lens E5, sixth lens E6, seventh lens E7, filter E8, and imaging surface S17.

[0110] The first lens E1 has positive optical power, with its object-side surface S1 being convex and its image-side surface S2 being flat. The second lens E2 has negative optical power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens E3 has negative optical power, with its object-side surface S5 being convex and its image-side surface S6 being concave. The fourth lens E4 has positive optical power, with its object-side surface S7 being convex and its image-side surface S8 being convex. The fifth lens E5 has positive optical power, with its object-side surface S9 being convex and its image-side surface S10 being concave. The sixth lens E6 has positive optical power, with its object-side surface S11 being convex and its image-side surface S12 being concave. The seventh lens E7 has negative optical power, with its object-side surface S13 being convex and its image-side surface S14 being concave. The filter E8 has an object-side surface S15 and an image-side surface S16. Light from the object passes sequentially through surfaces S1 to S16 and is finally imaged onto the imaging surface S17.

[0111] In this example, the total effective focal length f of the optical imaging lens is 4.86 mm, the total length TTL of the optical imaging lens is 6.55 mm, half the diagonal length of the effective pixel area on the imaging plane of the optical imaging lens, ImgH, is 4.18 mm, the minimum F-number FNOmin of the optical imaging lens is 1.39, and the maximum F-number FNOmax of the optical imaging lens is 2.04. When the F-number is at its minimum, the relative aperture of the optical imaging lens is at its maximum; when the F-number is at its maximum, the relative aperture of the optical imaging lens is at its minimum.

[0112] Table 5 shows the basic parameters of the optical imaging lens of Example 3, wherein the units of radius of curvature, thickness / distance and focal length are millimeters (mm). Tables 6-1 and 6-2 show the higher-order coefficients that can be used for each aspherical mirror in Example 3, wherein each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0113]

[0114]

[0115] Table 5

[0116] Face number A4 A6 A8 A10 A12 A14 A16 S1 -4.8883E-03 1.8142E-02 -6.6610E-02 1.5637E-01 -2.5392E-01 2.8905E-01 -2.3266E-01 S3 -4.1585E-02 4.4079E-02 -1.5481E-01 5.3990E-01 -1.2594E+00 2.0087E+00 -2.2539E+00 S4 -4.6808E-02 -9.5999E-03 1.4569E-01 -5.1701E-01 1.1433E+00 -1.6973E+00 1.7285E+00 S5 -3.9110E-02 1.5993E-02 -1.1997E-01 2.7053E-01 -3.8180E-01 3.6725E-01 -2.7897E-01 S6 -2.5558E-02 -8.5712E-03 3.0620E-02 -8.1326E-02 1.0316E-01 -3.4060E-02 -7.0737E-02 S7 -2.3205E-02 2.1812E-02 -6.0565E-02 1.6443E-01 -2.9242E-01 3.4007E-01 -2.5731E-01 S8 -1.7706E-02 -1.1403E-01 5.2674E-01 -1.5115E+00 2.9124E+00 -3.9255E+00 3.7904E+00 S9 -6.9482E-05 -8.8993E-02 1.4957E-01 -1.0809E-01 -4.6155E-02 1.8882E-01 -2.1376E-01 S10 2.0102E-02 -2.5958E-01 4.1737E-01 -4.2307E-01 3.0893E-01 -1.7065E-01 7.2758E-02 S11 1.9418E-01 -2.7870E-01 2.7179E-01 -2.1822E-01 1.4096E-01 -7.0494E-02 2.6365E-02 S12 7.3675E-02 1.5981E-02 -1.2483E-01 1.3886E-01 -8.7292E-02 3.6065E-02 -1.0368E-02 S13 -1.7357E-01 7.1985E-02 -2.9081E-02 9.8783E-03 -1.3429E-03 -3.9385E-04 2.3514E-04 S14 -2.8338E-01 2.0110E-01 -1.2840E-01 6.5845E-02 -2.5489E-02 7.2775E-03 -1.5224E-03

[0117] Table 6-1

[0118] Face number A18 A20 A22 A24 A26 A28 A30 S1 1.3258E-01 -5.3008E-02 1.4517E-02 -2.5901E-03 2.7102E-04 -1.2609E-05 0.0000E+00 S3 1.8091E+00 -1.0442E+00 4.3040E-01 -1.2380E-01 2.3644E-02 -2.6991E-03 1.3959E-04 S4 -1.2095E+00 5.7105E-01 -1.7361E-01 3.0649E-02 -2.3851E-03 0.0000E+00 0.0000E+00 S5 2.0838E-01 -1.5276E-01 8.7037E-02 -3.2166E-02 6.7026E-03 -5.9652E-04 0.0000E+00 S6 1.1228E-01 -8.0948E-02 3.4607E-02 -9.0138E-03 1.3298E-03 -8.5677E-05 0.0000E+00 S7 1.2305E-01 -3.3971E-02 3.5804E-03 6.4048E-04 -2.2372E-04 1.8417E-05 0.0000E+00 S8 -2.6529E+00 1.3470E+00 -4.9081E-01 1.2496E-01 -2.1089E-02 2.1176E-03 -9.5686E-05 S9 1.4433E-01 -6.5093E-02 2.0146E-02 -4.2363E-03 5.7910E-04 -4.6424E-05 1.6556E-06 S10 -2.4068E-02 6.1379E-03 -1.1825E-03 1.6559E-04 -1.5791E-05 9.1056E-07 -2.3822E-08 S11 -7.2431E-03 1.4462E-03 -2.0682E-04 2.0604E-05 -1.3561E-06 5.2947E-08 -9.2786E-10 S12 2.1294E-03 -3.1488E-04 3.3258E-05 -2.4456E-06 1.1876E-07 -3.4171E-09 4.4025E-11 S13 -5.6587E-05 8.3002E-06 -8.0487E-07 5.2111E-08 -2.1762E-09 5.3176E-11 -5.7869E-13 S14 2.3292E-04 -2.5952E-05 2.0802E-06 -1.1680E-07 4.3608E-09 -9.7246E-11 9.8014E-13

[0119] Table 6-2

[0120] Figure 11A and Figure 12A The on-axis chromatic aberration curves of the optical imaging lenses with aperture values ​​of 1.39 and 2.04 in Example 3 are shown respectively, which indicate the deviation of the focal point of light of different wavelengths after passing through the lens. Figure 11B and Figure 12B Astigmatism curves for optical imaging lenses with aperture values ​​of 1.39 and 2.04 in Example 3 are shown, representing meridional and sagittal image plane curvature, respectively. Figure 11C and Figure 12C The distortion curves of the optical imaging lenses with aperture values ​​of f / 1.39 and f / 2.04 in Example 3 are shown respectively, representing the distortion magnitude values ​​corresponding to different image heights. According to... Figures 11A to 12C It can be seen that the optical imaging lens given in Example 3 can achieve good imaging quality.

[0121] Example 4

[0122] The following is for reference Figures 13 to 16C An optical imaging lens according to Embodiment 4 of this application is described. Figure 13 and Figure 14 Schematic diagrams of optical imaging lenses with aperture values ​​of 1.39 and 2.04 according to Embodiment 4 of this application are shown respectively.

[0123] like Figure 13 and Figure 14 As shown, the optical imaging lens includes, from the object side to the image side, the following components in sequence: first lens E1, variable aperture STO, second lens E2, third lens E3, fourth lens E4, fifth lens E5, sixth lens E6, seventh lens E7, filter E8, and imaging surface S17.

[0124] The first lens E1 has positive optical power, with its object-side surface S1 being convex and its image-side surface S2 being flat. The second lens E2 has negative optical power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens E3 has negative optical power, with its object-side surface S5 being convex and its image-side surface S6 being concave. The fourth lens E4 has positive optical power, with its object-side surface S7 being convex and its image-side surface S8 being convex. The fifth lens E5 has positive optical power, with its object-side surface S9 being convex and its image-side surface S10 being concave. The sixth lens E6 has positive optical power, with its object-side surface S11 being convex and its image-side surface S12 being concave. The seventh lens E7 has negative optical power, with its object-side surface S13 being convex and its image-side surface S14 being concave. The filter E8 has an object-side surface S15 and an image-side surface S16. Light from the object passes sequentially through surfaces S1 to S16 and is finally imaged onto the imaging surface S17.

[0125] In this example, the total effective focal length f of the optical imaging lens is 4.87 mm, the total length TTL of the optical imaging lens is 6.55 mm, half the diagonal length of the effective pixel area on the imaging plane of the optical imaging lens, ImgH, is 4.18 mm, the minimum F-number FNOmin of the optical imaging lens is 1.39, and the maximum F-number FNOmax of the optical imaging lens is 2.04. When the F-number is at its minimum, the relative aperture of the optical imaging lens is at its maximum; when the F-number is at its maximum, the relative aperture of the optical imaging lens is at its minimum.

[0126] Table 7 shows the basic parameters of the optical imaging lens of Example 4, wherein the units of radius of curvature, thickness / distance 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 Example 4, wherein each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0127]

[0128] Table 7

[0129] Face number A4 A6 A8 A10 A12 A14 A16 S1 -4.5246E-03 1.4961E-02 -5.3078E-02 1.2282E-01 -2.0007E-01 2.2998E-01 -1.8721E-01 S3 -4.0246E-02 4.0403E-02 -1.3791E-01 4.9888E-01 -1.2063E+00 1.9905E+00 -2.3080E+00 S4 -4.6733E-02 -6.5614E-03 1.2979E-01 -4.6771E-01 1.0463E+00 -1.5697E+00 1.6148E+00 S5 -3.2037E-02 -9.8957E-03 -1.7784E-02 -3.8174E-02 2.9841E-01 -7.0667E-01 9.3002E-01 S6 -1.3448E-02 -4.6054E-02 1.2882E-01 -2.7138E-01 3.7152E-01 -3.0026E-01 1.0537E-01 S7 -1.8103E-02 1.0303E-02 -6.7531E-02 2.6111E-01 -5.5596E-01 7.5917E-01 -7.0017E-01 S8 -1.5251E-02 -1.3220E-01 6.2525E-01 -1.8546E+00 3.6835E+00 -5.0984E+00 5.0400E+00 S9 4.8951E-03 -8.2312E-02 1.3283E-01 -9.2711E-02 -4.9469E-02 1.7979E-01 -2.0039E-01 S10 1.1038E-02 -2.4084E-01 3.9684E-01 -4.0863E-01 3.0178E-01 -1.6786E-01 7.1793E-02 S11 9.3107E-02 -1.6436E-01 1.6499E-01 -1.3900E-01 9.6159E-02 -5.1473E-02 2.0347E-02 S12 5.5554E-02 2.8276E-02 -1.3398E-01 1.4585E-01 -9.1501E-02 3.7926E-02 -1.0962E-02 S13 -1.8526E-01 8.0407E-02 -3.4359E-02 1.2270E-02 -1.7604E-03 -5.2220E-04 3.2824E-04 S14 -2.8571E-01 1.9647E-01 -1.1947E-01 5.8243E-02 -2.1565E-02 5.9420E-03 -1.2096E-03

[0130] Table 8-1

[0131] Face number A18 A20 A22 A24 A26 A28 A30 S1 1.0781E-01 -4.3498E-02 1.2001E-02 -2.1539E-03 2.2640E-04 -1.0569E-05 0.0000E+00 S3 1.9133E+00 -1.1406E+00 4.8576E-01 -1.4441E-01 2.8511E-02 -3.3631E-03 1.7956E-04 S4 -1.1412E+00 5.4403E-01 -1.6694E-01 2.9733E-02 -2.3331E-03 0.0000E+00 0.0000E+00 S5 -7.5832E-01 3.9035E-01 -1.2212E-01 2.0347E-02 -1.0345E-03 -8.9274E-05 0.0000E+00 S6 4.2417E-02 -7.0674E-02 3.8772E-02 -1.1529E-02 1.8526E-03 -1.2670E-04 0.0000E+00 S7 4.4497E-01 -1.9547E-01 5.8454E-02 -1.1404E-02 1.3156E-03 -6.8527E-05 0.0000E+00 S8 -3.6025E+00 1.8646E+00 -6.9156E-01 1.7901E-01 -3.0686E-02 3.1279E-03 -1.4341E-04 S9 1.3411E-01 -6.0021E-02 1.8437E-02 -3.8476E-03 5.2196E-04 -4.1524E-05 1.4695E-06 S10 -2.3762E-02 6.0554E-03 -1.1652E-03 1.6294E-04 -1.5517E-05 8.9358E-07 -2.3346E-08 S11 -5.8337E-03 1.2045E-03 -1.7697E-04 1.8029E-05 -1.2092E-06 4.7981E-08 -8.5266E-10 S12 2.2658E-03 -3.3727E-04 3.5863E-05 -2.6546E-06 1.2976E-07 -3.7579E-09 4.8725E-11 S13 -8.2483E-05 1.2619E-05 -1.2761E-06 8.6155E-08 -3.7520E-09 9.5602E-11 -1.0849E-12 S14 1.8129E-04 -1.9882E-05 1.5740E-06 -8.7516E-08 3.2420E-09 -7.1853E-11 7.2086E-13

[0132] Table 8-2

[0133] Figure 15A and Figure 16A The on-axis chromatic aberration curves of the optical imaging lenses with aperture values ​​of 1.39 and 2.04 in Example 4 are shown respectively, which indicate the deviation of the focal point of light of different wavelengths after passing through the lens. Figure 15B and Figure 16B Astigmatism curves for optical imaging lenses with aperture values ​​of 1.39 and 2.04 in Example 4 are shown, representing meridional and sagittal image plane curvature, respectively. Figure 15C and Figure 16C The distortion curves of the optical imaging lenses with aperture values ​​of f / 1.39 and f / 2.04 in Example 4 are shown respectively, representing the distortion magnitude corresponding to different image heights. According to... Figures 15A to 16C It can be seen that the optical imaging lens given in Example 4 can achieve good imaging quality.

[0134] Example 5

[0135] The following is for reference Figures 17 to 20C An optical imaging lens according to Embodiment 5 of this application is described. Figure 17 and Figure 18Schematic diagrams of optical imaging lenses with aperture values ​​of 1.40 and 2.04 according to Embodiment 5 of this application are shown respectively.

[0136] like Figure 17 and Figure 18 As shown, the optical imaging lens includes, from the object side to the image side, the following components in sequence: first lens E1, variable aperture STO, second lens E2, third lens E3, fourth lens E4, fifth lens E5, sixth lens E6, seventh lens E7, filter E8, and imaging surface S17.

[0137] The first lens E1 has positive optical power, with its object-side surface S1 being convex and its image-side surface S2 being flat. The second lens E2 has negative optical power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens E3 has negative optical power, with its object-side surface S5 being convex and its image-side surface S6 being concave. The fourth lens E4 has positive optical power, with its object-side surface S7 being convex and its image-side surface S8 being convex. The fifth lens E5 has negative optical power, with its object-side surface S9 being convex and its image-side surface S10 being concave. The sixth lens E6 has positive optical power, with its object-side surface S11 being convex and its image-side surface S12 being concave. The seventh lens E7 has negative optical power, with its object-side surface S13 being convex and its image-side surface S14 being concave. The filter E8 has an object-side surface S15 and an image-side surface S16. Light from the object passes sequentially through surfaces S1 to S16 and is finally imaged onto the imaging surface S17.

[0138] In this example, the total effective focal length f of the optical imaging lens is 4.87 mm, the total length TTL of the optical imaging lens is 6.55 mm, half the diagonal length of the effective pixel area on the imaging plane of the optical imaging lens, ImgH, is 4.18 mm, the minimum F-number FNOmin of the optical imaging lens is 1.40, and the maximum F-number FNOmax of the optical imaging lens is 2.04. When the F-number is at its minimum, the relative aperture of the optical imaging lens is at its maximum; when the F-number is at its maximum, the relative aperture of the optical imaging lens is at its minimum.

[0139] Table 9 shows the basic parameters of the optical imaging lens of Example 5, wherein the units of radius of curvature, thickness / distance and focal length are millimeters (mm). Tables 10-1 and 10-2 show the higher-order coefficients that can be used for each aspherical mirror in Example 5, wherein each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0140]

[0141] Table 9

[0142]

[0143]

[0144] Table 10-1

[0145] Face number A18 A20 A22 A24 A26 A28 A30 S1 1.1352E-01 -4.5784E-02 1.2648E-02 -2.2764E-03 2.4027E-04 -1.1274E-05 0.0000E+00 S3 3.1714E+00 -1.8956E+00 8.0785E-01 -2.3941E-01 4.6868E-02 -5.4472E-03 2.8458E-04 S4 -1.5548E+00 7.1251E-01 -2.0981E-01 3.5849E-02 -2.7000E-03 0.0000E+00 0.0000E+00 S5 4.6765E+00 -2.5491E+00 9.6315E-01 -2.4000E-01 3.5491E-02 -2.3605E-03 0.0000E+00 S6 8.2662E-01 -3.5844E-01 1.0706E-01 -2.0938E-02 2.4121E-03 -1.2417E-04 0.0000E+00 S7 5.7410E-01 -2.1937E-01 5.6279E-02 -9.1665E-03 8.4514E-04 -3.2933E-05 0.0000E+00 S8 -2.0536E+00 1.0613E+00 -3.9247E-01 1.0115E-01 -1.7243E-02 1.7459E-03 -7.9451E-05 S9 1.0638E-01 -4.6369E-02 1.3880E-02 -2.8232E-03 3.7326E-04 -2.8940E-05 9.9817E-07 S10 -2.2773E-02 5.7830E-03 -1.1081E-03 1.5431E-04 -1.4635E-05 8.3951E-07 -2.1849E-08 S11 -5.0849E-03 1.0347E-03 -1.4976E-04 1.5028E-05 -9.9281E-07 3.8800E-08 -6.7910E-10 S12 2.2166E-03 -3.2862E-04 3.4783E-05 -2.5613E-06 1.2444E-07 -3.5781E-09 4.5996E-11 S13 -7.8546E-05 1.1966E-05 -1.2038E-06 8.0841E-08 -3.5019E-09 8.8758E-11 -1.0019E-12 S14 1.9954E-04 -2.2118E-05 1.7737E-06 -1.0003E-07 3.7607E-09 -8.4573E-11 8.6037E-13

[0146] Table 10-2

[0147] Figure 19A and Figure 20A The on-axis chromatic aberration curves of the optical imaging lenses with aperture values ​​of 1.40 and 2.04 in Example 5 are shown respectively, which indicate the deviation of the focal point of light of different wavelengths after passing through the lens. Figure 19B and Figure 20B Astigmatism curves for optical imaging lenses with aperture values ​​of 1.40 and 2.04 in Example 5 are shown, representing meridional and sagittal image plane curvature, respectively. Figure 19C and Figure 20C The distortion curves of the optical imaging lenses with aperture values ​​of f / 1.40 and f / 2.04 in Example 5 are shown respectively, representing the distortion magnitude values ​​corresponding to different image heights. According to... Figures 19A to 20C It can be seen that the optical imaging lens given in Example 5 can achieve good imaging quality.

[0148] Example 6

[0149] The following is for reference Figures 21 to 24C An optical imaging lens according to Embodiment 6 of this application is described. Figure 21 and Figure 22 Schematic diagrams of optical imaging lenses with aperture values ​​of 1.40 and 2.05 according to Embodiment 6 of this application are shown respectively.

[0150] like Figure 21 and Figure 22 As shown, the optical imaging lens includes, from the object side to the image side, the following components in sequence: first lens E1, variable aperture STO, second lens E2, third lens E3, fourth lens E4, fifth lens E5, sixth lens E6, seventh lens E7, filter E8, and imaging surface S17.

[0151] The first lens E1 has positive optical power, with its object-side surface S1 being convex and its image-side surface S2 being flat. The second lens E2 has negative optical power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens E3 has negative optical power, with its object-side surface S5 being convex and its image-side surface S6 being concave. The fourth lens E4 has positive optical power, with its object-side surface S7 being convex and its image-side surface S8 being convex. The fifth lens E5 has negative optical power, with its object-side surface S9 being convex and its image-side surface S10 being concave. The sixth lens E6 has positive optical power, with its object-side surface S11 being convex and its image-side surface S12 being concave. The seventh lens E7 has negative optical power, with its object-side surface S13 being convex and its image-side surface S14 being concave. The filter E8 has an object-side surface S15 and an image-side surface S16. Light from the object passes sequentially through surfaces S1 to S16 and is finally imaged onto the imaging surface S17.

[0152] In this example, the total effective focal length f of the optical imaging lens is 4.87 mm, the total length TTL of the optical imaging lens is 6.55 mm, half the diagonal length of the effective pixel area on the imaging plane of the optical imaging lens, ImgH, is 4.18 mm, the minimum F-number FNOmin of the optical imaging lens is 1.40, and the maximum F-number FNOmax of the optical imaging lens is 2.05. When the F-number is at its minimum, the relative aperture of the optical imaging lens is at its maximum; when the F-number is at its maximum, the relative aperture of the optical imaging lens is at its minimum.

[0153] Table 11 shows the basic parameters of the optical imaging lens of Example 6, wherein the units of radius of curvature, thickness / distance and focal length are millimeters (mm). Tables 12-1 and 12-2 show the higher-order coefficients that can be used for each aspherical mirror in Example 6, wherein each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0154]

[0155] Table 11

[0156] Face number A4 A6 A8 A10 A12 A14 A16 S1 -5.3231E-03 1.5724E-02 -5.7023E-02 1.3213E-01 -2.1396E-01 2.4395E-01 -1.9705E-01 S3 -3.5093E-02 5.6083E-02 -2.3531E-01 8.3825E-01 -1.9922E+00 3.2507E+00 -3.7459E+00 S4 -4.0345E-02 -1.5066E-02 1.8715E-01 -6.7376E-01 1.4873E+00 -2.1772E+00 2.1671E+00 S5 -5.1695E-02 1.0392E-01 -5.5395E-01 1.7735E+00 -3.8626E+00 5.8600E+00 -6.2992E+00 S6 -4.9370E-02 8.9630E-02 -2.9760E-01 7.0878E-01 -1.2010E+00 1.4427E+00 -1.2323E+00 S7 -3.7485E-02 8.2081E-02 -2.6628E-01 6.6171E-01 -1.1155E+00 1.2850E+00 -1.0258E+00 S8 -2.4465E-02 -6.9853E-02 3.3221E-01 -9.7693E-01 1.9228E+00 -2.6412E+00 2.5932E+00 S9 -1.0511E-02 -5.1694E-02 9.3186E-02 -6.0880E-02 -5.2502E-02 1.5155E-01 -1.6103E-01 S10 -5.2919E-02 -1.7304E-01 3.4461E-01 -3.7475E-01 2.8284E-01 -1.5877E-01 6.8023E-02 S11 1.6711E-02 -1.1438E-01 1.3467E-01 -1.2384E-01 8.9122E-02 -4.8298E-02 1.9089E-02 S12 6.0840E-02 2.8092E-02 -1.3572E-01 1.4651E-01 -9.1411E-02 3.7769E-02 -1.0893E-02 S13 -1.9126E-01 8.8992E-02 -3.8434E-02 1.3237E-02 -1.9419E-03 -4.5573E-04 3.0158E-04 S14 -2.8589E-01 2.0132E-01 -1.2514E-01 6.1944E-02 -2.3152E-02 6.4228E-03 -1.3168E-03

[0157] Table 12-1

[0158]

[0159]

[0160] Table 12-2

[0161] Figure 23A and Figure 24A The on-axis chromatic aberration curves of the optical imaging lenses with aperture values ​​of 1.40 and 2.05 in Example 6 are shown respectively, which indicate the deviation of the focal point of light of different wavelengths after passing through the lens. Figure 23B and Figure 24B Astigmatism curves for optical imaging lenses with aperture values ​​of 1.40 and 2.05 in Example 6 are shown, respectively, representing meridional image plane curvature and sagittal image plane curvature. Figure 23C and Figure 24C The distortion curves of the optical imaging lenses with aperture values ​​of 1.40 and 2.05 in Example 6 are shown respectively, representing the distortion magnitude values ​​corresponding to different image heights. According to... Figures 23A to 24C It can be seen that the optical imaging lens given in Example 6 can achieve good imaging quality.

[0162] In summary, Examples 1 to 6 respectively satisfy the relationships shown in Table 13.

[0163] Conditional / Example 1 2 3 4 5 6 f1 / (EPDmax-EPDmin) 4.21 4.21 4.22 4.22 4.31 4.30 f3 / (f2+f7) 1.59 1.54 1.48 1.55 1.40 1.40 f4 / R7 1.45 1.46 1.34 1.36 1.52 1.55 (R11+R12) / f6 1.63 1.63 1.48 1.27 1.62 1.62 R3 / R4 2.00 2.00 2.08 2.13 1.95 1.95 R5 / R6 1.57 1.57 1.60 1.59 1.56 1.57 (CT1+T12) / (CT2+T23+CT3) 1.00 0.99 0.99 1.00 1.00 1.00 (DT31+DT32) / DT11 1.72 1.72 1.73 1.72 1.76 1.77 f34 / f12 2.92 3.05 3.07 3.10 4.78 4.78 f56 / (CT5+CT6) 7.06 6.97 6.90 7.05 6.63 6.61 (SAG71+SAG72) / (SAG51+SAG52) 1.20 1.20 1.43 1.55 1.67 1.70

[0164] Table 13

[0165] 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.

[0166] 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, sequentially from the object side to the image side along the optical axis comprises: a first lens with positive refractive power, whose object side surface is convex, and whose image side surface is flat; a variable diaphragm; a second lens with negative refractive power, whose object side surface is convex, and whose image side surface is concave; a third lens with negative refractive power, whose object side surface is convex, and whose image side surface is concave; a fourth lens with positive refractive power, whose object side surface is convex, and whose image side surface is convex; a fifth lens with refractive power, whose object side surface is convex, and whose image side surface is concave; a sixth lens with positive refractive power, whose object side surface is convex, and whose image side surface is concave; and a seventh lens with negative refractive power, whose object side surface is convex, and whose image side surface is concave; the first lens is a glass lens, and the image side surface of the first lens is a spherical mirror surface; wherein the number of lenses with refractive power of the optical imaging lens is seven; a combined focal length f12 of the first lens and the second lens and a combined focal length f34 of the third lens and the fourth lens satisfy: 2.9 < f34 / f12 ≤ 4.78; a combined focal length f56 of the fifth lens and the sixth lens, a central thickness CT5 of the fifth lens on the optical axis, and a central thickness CT6 of the sixth lens on the optical axis satisfy: 6.61 ≤ f56 / (CT5+CT6) < 7.

1. 2.The optical imaging lens according to claim 1, wherein, an effective focal length f2 of the second lens, an effective focal length f3 of the third lens, and an effective focal length f7 of the seventh lens satisfy: 1.40 ≤ f3 / (f2+f7) ≤ 1.

59. 3.The optical imaging lens according to claim 1, wherein, an effective focal length f4 of the fourth lens and a radius of curvature R7 of the object side surface of the fourth lens satisfy: 1.3 < f4 / R7 ≤ 1.

55. 4.The optical imaging lens according to claim 1, wherein, a radius of curvature R12 of the image side surface of the sixth lens, a radius of curvature R11 of the object side surface of the sixth lens, and an effective focal length f6 of the sixth lens satisfy: 1.27 ≤ (R11+R12) / f6 ≤ 1.

63.

5. The optical imaging lens according to claim 1, characterized in that, a radius of curvature R3 of the object side surface of the second lens and a radius of curvature R4 of the image side surface of the second lens satisfy: 1.95 ≤ R3 / R4 ≤ 2.

13. 6.The optical imaging lens according to claim 1, wherein, a radius of curvature R5 of the object side surface of the third lens and a radius of curvature R6 of the image side surface of the third lens satisfy: 1.56 ≤ R5 / R6 ≤ 1.

60. 7.The optical imaging lens according to claim 1, wherein, a central thickness CT1 of the first lens on the optical axis, a central thickness CT2 of the second lens on the optical axis, a central thickness CT3 of the third lens on the optical axis, a separation distance T12 of the first lens and the second lens on the optical axis, and a separation distance T23 of the second lens and the third lens on the optical axis satisfy: 0.99 ≤ (CT1+T12) / (CT2+T23+CT3) ≤ 1.

00. 8.The optical imaging lens according to claim 1, wherein, an effective radius DT31 of the object side surface of the third lens, an effective radius DT32 of the image side surface of the third lens, and an effective radius DT11 of the object side surface of the first lens satisfy: 1.72 ≤ (DT31+DT32) / DT11 ≤ 1.

77. 9.The optical imaging lens according to claim 1, wherein, A distance SAG52 on the optical axis from an intersection of the image-side surface of the fifth lens and the optical axis to a vertex of an effective radius of the image-side surface of the fifth lens, a distance SAG51 on the optical axis from an intersection of the object-side surface of the fifth lens and the optical axis to a vertex of an effective radius of the object-side surface of the fifth lens, a distance SAG72 on the optical axis from an intersection of the image-side surface of the seventh lens and the optical axis to a vertex of an effective radius of the image-side surface of the seventh lens, and a distance SAG71 on the optical axis from an intersection of the object-side surface of the seventh lens and the optical axis to a vertex of an effective radius of the object-side surface of the seventh lens satisfy: 1.20 ≤ (SAG71 + SAG72) / (SAG51 + SAG52) ≤ 1.

70. 10.The optical imaging lens according to any one of claims 1-9, wherein, A maximum entrance pupil diameter EPDmax of the optical imaging lens, a minimum entrance pupil diameter EPDmin of the optical imaging lens, and an effective focal length f1 of the first lens satisfy: 4.21 ≤ f1 / (EPDmax - EPDmin) ≤ 4.31.

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