Optical imaging lens

Abstract

The application discloses an optical imaging lens, which comprises a lens barrel, a lens set and a bearing set arranged in the lens barrel, wherein the lens set comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens; the first lens has a negative focal power, the second lens has a positive focal power, the third lens has a positive focal power, the fourth lens has a positive focal power, the fifth lens has a negative focal power, the sixth lens has a positive focal power, and the seventh lens has a negative focal power; the bearing set comprises a fourth bearing; the effective half aperture of the object side of the fourth lens is smaller than the effective half aperture of each lens in the lens set; the inner diameter d0s of the object side end surface of the lens barrel, the outer diameter D4m of the image side surface of the fourth bearing, the effective half aperture DT11 of the object side of the first lens and the effective half aperture DT41 of the object side of the fourth lens satisfy 1.6<(d0s-D4m) / (DT11-DT41)<2.1; and the minimum aperture d0smin of the lens barrel in the direction perpendicular to the optical axis is located between the third lens and the fourth lens.

Description

[0001] Divisional Application Declaration

[0002] This application is a divisional application of the China Invention Patent Application No. 202311471506.6, filed on November 7, 2023, entitled “Optical Imaging Lens”, which claims priority to the China Invention Patent Application No. 202210593593.8, filed on May 18, 2022, entitled “Optical Imaging Lens”. TECHNICAL FIELD

[0003] The present application relates to the field of optical elements, in particular, to an optical imaging lens. BACKGROUND

[0004] With the development of the current VR / AR industry, optical lenses are widely used in scenarios such as photography, spatial recognition and positioning; and with the continuous innovation of technology and the continuous upgrading of functions of consumer-level electronic products such as mobile phones / tablets / unmanned aerial vehicles, people's requirements for the functions and imaging quality of lenses are also getting higher and higher.

[0005] For an ultra-wide-angle lens, the radial size of the first lens is usually large, and the front end lens occupies most of the space inside the lens barrel, which will cause the stress to be concentrated on the rear end of the lens after assembly, thereby affecting the assembly stability. Therefore, how to ensure the imaging quality of the ultra-wide-angle lens while reasonably designing the distribution of the lenses and the supporting parts to improve the assembly stability of the ultra-wide-angle lens has been one of the research directions of the current technical personnel in the field. SUMMARY

[0006] The first aspect of the present application provides an optical imaging lens, comprising a lens barrel, and a lens group and a support group disposed in the lens barrel, wherein the lens group comprises, in sequence from the object side to the image side along the optical axis, a first lens with negative refractive power, a second lens with positive refractive power, a third lens with positive refractive power, a fourth lens with positive refractive power, a fifth lens with negative refractive power, a sixth lens with positive refractive power, and a seventh lens with negative refractive power, wherein the first lens is a meniscus lens facing the image side, the refractive index N1 of the first lens is less than 1.55, and the effective half aperture of the object side surface of the first lens is greater than the effective half aperture of each lens in the lens group; the object side surface of the third lens is concave, and the image side surface is convex; the object side surface of the fourth lens is convex, and the image side surface is convex; the object side surface of the fifth lens is concave, and the image side surface is concave; the object side surface of the sixth lens is convex, and the image side surface is convex; and the object side surface of the seventh lens is convex, and the image side surface is concave; the support group comprises a second support disposed on the image side of the second lens and at least partially in contact with the image side surface of the second lens, and a fourth support disposed on the image side of the fourth lens and at least partially in contact with the image side surface of the fourth lens; the effective focal length f of the optical imaging lens and the maximum half field angle Semi-FOV of the optical imaging lens satisfy: 0.9 < f / tan(Semi-FOV) < 1.5; 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, and the maximum height L of the lens barrel along the optical axis direction satisfy: 2.6 < L / (CT1+CT2+CT3) < 3.0; and the inner diameter d0s of the object side end surface of the lens barrel, the outer diameter D2s of the object side surface of the second support, and the refractive index N1 of the first lens satisfy: 2.2 < d0s / D2s x N1 < 2.8.

[0007] The second aspect of the present application provides an optical imaging lens, comprising a lens barrel, and a lens group and a support group arranged in the lens barrel, wherein the lens group comprises, in sequence from the object side to the image side along the optical axis, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens, wherein the first lens is a meniscus lens with negative refractive power facing the image side, the second lens has positive refractive power, the third lens has positive refractive power, the object side surface of the third lens is concave, and the image side surface of the third lens is convex, the fourth lens has positive refractive power, the object side surface of the fourth lens is convex, and the image side surface of the fourth lens is convex, the fifth lens has negative refractive power, the object side surface of the fifth lens is concave, and the image side surface of the fifth lens is concave, the sixth lens has positive refractive power, the object side surface of the sixth lens is convex, and the image side surface of the sixth lens is convex, and the seventh lens has negative refractive power, the object side surface of the seventh lens is convex, and the image side surface of the seventh lens is concave; the support group comprises a fourth support arranged on the image side of the fourth lens and at least partially in contact with the image side surface of the fourth lens; the effective half aperture of the object side surface of the fourth lens is smaller than the effective half aperture of each lens in the lens group; the inner diameter d0s of the object side end surface of the lens barrel, the outer diameter D4m of the image side surface of the fourth support, the effective half aperture DT11 of the object side surface of the first lens, and the effective half aperture DT41 of the object side surface of the fourth lens satisfy: 1.6 < (d0s-D4m) / (DT11-DT41) < 2.1.

[0008] In an embodiment, the outer diameter D2m of the image side surface of the second support, the outer diameter D4s of the object side surface of the fourth support, and the central thickness CT4 of the fourth lens along the optical axis satisfy: 0.9 < (D2m-D4s) / CT4 < 2.1.

[0009] In an embodiment, the effective half aperture DT11 of the object side surface of the first lens and the effective half aperture DT21 of the object side surface of the second lens satisfy: 2.5 mm < DT11-DT21 < 5 mm.

[0010] In an embodiment, the central thickness CT3 of the third lens along the optical axis, the central thickness CT2 of the second lens along the optical axis, the air gap T23 between the second lens and the third lens along the optical axis, and the maximum thickness CP2 of the second support along the optical axis satisfy: 32.0 < CT3 / CT2+T23 / CP2 < 34.0.

[0011] In an embodiment, the radius of curvature R2 of the image side surface of the first lens, the central thickness CT1 of the first lens along the optical axis, and the refractive index N1 of the first lens satisfy: 1.9 < (R2 / CT1) / N1 < 2.7; and the inner diameter d2s of the object side surface of the second support, the maximum thickness CP2 of the second support along the optical axis, and the Abbe number V2 of the second lens satisfy: 10.0 < d2s / CP2 / V2 < 15.5.

[0012] In one embodiment, the set of abutment members further comprises a fifth abutment member disposed on the image side of the fifth lens and at least partially in contact with the image side surface of the fifth lens; the radius of curvature R9 of the object side surface of the fifth lens, the radius of curvature R10 of the image side surface of the fifth lens, the inner diameter d4s of the object side surface of the fourth abutment member and the inner diameter d5s of the object side surface of the fifth abutment member satisfy: -7.2 < (R9+R10) / (d5s-d4s) < -2.8.

[0013] In one embodiment, the effective focal length f4 of the fourth lens, the refractive index N4 of the fourth lens and the inner diameter d4m of the image side surface of the fourth abutment member satisfy: 0.6 < f4 / N4 / d4m < 1.0.

[0014] In one embodiment, the optical imaging lens further comprises a sixth abutment member disposed on the image side of the sixth lens and at least partially in contact with the image side surface of the sixth lens; the inner diameter d6m of the image side surface of the sixth abutment member, the inner diameter d6s of the object side surface of the sixth abutment member, the effective focal length f6 of the sixth lens and the radius of curvature R12 of the image side surface of the sixth lens satisfy: 0.6 < (d6m-d6s) / (f6 / R12) < 1.0.

[0015] In one embodiment, the effective half aperture of the object side surface of the fourth lens is smaller than the effective half aperture of each lens in the lens set; and the inner diameter d0s of the object side end surface of the lens barrel, the outer diameter D4m of the image side surface of the fourth abutment member, the effective half aperture DT11 of the object side surface of the first lens and the effective half aperture DT41 of the object side surface of the fourth lens satisfy: 1.6 < (d0s-D4m) / (DT11-DT41) < 2.1.

[0016] In one embodiment, the maximum thickness CP6 of the sixth abutment member along the optical axis direction and the central thickness CT6 of the sixth lens on the optical axis satisfy: 1.0 ≤ CP6 / CT6 < 1.5.

[0017] In one embodiment, the distance TD of the object side surface of the first lens to the image side surface of the seventh lens on the optical axis, the inner diameter d0m of the image side end surface of the lens barrel and the inner diameter d0s of the object side end surface of the lens barrel satisfy: -3.2 < TD / (d0m-d0s) < -2.5.

[0018] In one embodiment, the distance TD of the object side surface of the first lens to the image side surface of the seventh lens on the optical axis, the distance EP24 of the image side surface of the second abutment member to the object side surface of the fourth abutment member along the optical axis direction satisfy: 2.0 < TD / EP24 < 3.1.

[0019] In one embodiment, the seventh lens has at least one inflection point on the object side face or the image side face thereof; the inner diameter d0m of the image side end face of the lens barrel, the effective focal length f7 of the seventh lens, the radius of curvature R13 of the object side face of the seventh lens, and the radius of curvature R14 of the image side face of the seventh lens satisfy: -3.8 < d0m / (f7 / (R13+R14)) < -1.5.

[0020] In one embodiment, the effective focal length f2 of the second lens, the effective focal length f3 of the third lens, the outer diameter D2s of the object side face of the second abutting member, and the inner diameter d2s of the object side face of the second abutting member satisfy: 0.8 < (f2 / f3) / (D2s / d2s) < 3.5.

[0021] In one embodiment, the maximum thickness CP6 of the sixth abutting member in the direction of the optical axis, the maximum thickness CP5 of the fifth abutting member in the direction of the optical axis, the air gap T67 of the sixth lens and the seventh lens on the optical axis, and the air gap T56 of the fifth lens and the sixth lens on the optical axis satisfy: 69.5 < (CP6 / CP5)+(T67 / T56) < 80.

[0022] In one embodiment, the minimum aperture d0smin of the lens barrel in the direction perpendicular to the optical axis is less than 3.1 mm.

[0023] In one embodiment, the minimum aperture d0smin of the lens barrel in the direction perpendicular to the optical axis is located between the third lens and the fourth lens.

[0024] The application provides a seven-piece type ultra-wide-angle lens, through reasonable positive and negative light focus and surface type matching, the trend of light is beneficial to be controlled, the characteristics of ultra-wide-angle and high resolution are realized, the industry application demand can be better met, and 0.9 BRIEF DESCRIPTION OF DRAWINGS

[0025] Other features, objects, and advantages of the application will become more apparent from the following detailed description of non-limiting embodiments, read in conjunction with the accompanying drawings:

[0026] Figure 1 The structural arrangement diagram and the schematic diagram of part parameters of an optical imaging lens according to the application are shown;

[0027] Figures 2A-2C The stress deformation displacement schematic diagrams of the optical imaging lens according to the application in three cases are shown;

[0028] Figure 3A The structural schematic diagram of the optical imaging lens according to the embodiment 1 of the application is shown;

[0029] Figure 3B The structural schematic diagram of the optical imaging lens according to the embodiment 2 of the application is shown;

[0030] Figures 4A-4C The on-axis chromatic aberration curves, the astigmatism curves and the magnification chromatic aberration curves of the optical imaging lenses according to the embodiment 1 and the embodiment 2 of the application are respectively shown;

[0031] Figure 5A The structural schematic diagram of the optical imaging lens according to the embodiment 3 of the application is shown;

[0032] Figure 5B A structural diagram of an optical imaging lens according to Embodiment 4 of the present application is shown;

[0033] Figures 6A-6C Axial chromatic aberration curves, astigmatic curves and lateral chromatic aberration curves of optical imaging lenses according to Embodiments 3 and 4 of the present application are shown, respectively;

[0034] Figure 7A A structural diagram of an optical imaging lens according to Embodiment 5 of the present application is shown;

[0035] Figure 7B A structural diagram of an optical imaging lens according to Embodiment 6 of the present application is shown; and

[0036] Figures 8A-8C Axial chromatic aberration curves, astigmatic curves and lateral chromatic aberration curves of optical imaging lenses according to Embodiments 5 and 6 of the present application are shown, respectively. DETAILED DESCRIPTION

[0037] For a better understanding of the present application, various aspects of the present application will be described in more detail below with reference to the accompanying drawings. It is to be understood that the detailed description is merely descriptive of exemplary embodiments of the present application and is not intended to limit the scope of the present application in any way. Throughout the specification, like reference numerals refer to like elements. The expression “and / or” includes any and all combinations of one or more of the associated listed items.

[0038] It should be noted that, in the present specification, the expressions first, second, third and the like are merely used to distinguish one feature from another feature, and do not represent any limitation on the features. Therefore, the first lens discussed below can also be referred to as the second lens or the third lens without departing from the teachings of the present application.

[0039] In the drawings, the thickness, size and shape of the lenses have been slightly exaggerated for ease of explanation. Specifically, the shape of the spherical surface or aspherical surface shown in the drawings is shown by way of example. That is, the shape of the spherical surface or aspherical surface is not limited to the shape of the spherical surface or aspherical surface shown in the drawings. The drawings are merely examples and are not drawn strictly to scale.

[0040] In the present specification, the paraxial region refers to a region near the optical axis. If a lens surface is convex and the position of the convex surface is not specified, it means that the lens surface is convex at least in the paraxial region. If a lens surface is concave and the position of the concave surface is not specified, it means that the lens surface is concave at least in the paraxial region. The surface of each lens close to the object is referred to as the object side surface of the lens, and the surface of each lens close to the imaging surface is referred to as the image side surface of the lens.

[0041] 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.

[0042] 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.

[0043] 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 group, lens barrel, and support member 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, support member, etc. of that embodiment.

[0044] 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 commonly used in the art (e.g., the center thickness CT1 of the first lens on the optical axis) are not shown in the diagram. Figure 1 As shown in the figure, Figure 1 The following are merely illustrative examples of partial parameters of the lens barrel and support member of an optical imaging lens according to this application, to facilitate a better understanding of the invention. Figure 1As shown, CP2 represents the maximum thickness of the second bearing member along the optical axis direction, CP5 represents the maximum thickness of the fifth bearing member along the optical axis direction, CP6 represents the maximum thickness of the sixth bearing member along the optical axis direction, EP24 represents the distance from the image side surface of the second bearing member to the object side surface of the fourth bearing member along the optical axis direction, d0smin represents the minimum aperture of the lens barrel in the direction perpendicular to the optical axis, d2s represents the inner diameter of the object side surface of the second bearing member, D2s represents the outer diameter of the object side surface of the second bearing member, D2m represents the outer diameter of the image side surface of the second bearing member, d0s represents the inner diameter of the object end surface of the lens barrel, d4s represents the inner diameter of the object side surface of the fourth bearing member, d5s represents the inner diameter of the object side surface of the fifth bearing member, d6s represents the inner diameter of the object side surface of the sixth bearing member, D4m represents the outer diameter of the image side surface of the fourth bearing member, d6m represents the inner diameter of the image side surface of the sixth bearing member, and d0m represents the inner diameter of the image end surface of the lens barrel.

[0045] The optical imaging lens according to the exemplary embodiments of the present application comprises a lens barrel, and a lens group and a bearing member group arranged in the lens barrel. The lens group comprises, in order from the object side to the image side along the optical axis, a first lens with negative refractive power, a second lens with positive refractive power, a third lens with positive refractive power, a fourth lens with positive refractive power, a fifth lens with negative refractive power, a sixth lens with positive refractive power, and a seventh lens with negative refractive power. The first lens is a meniscus lens facing the image side, the object side surface of the third lens is concave, and the image side surface is convex; the object side surface of the fourth lens is convex, and the image side surface is convex; the object side surface of the fifth lens is concave, and the image side surface is concave; the object side surface of the sixth lens is convex, and the image side surface is convex; and the object side surface of the seventh lens is convex, and the image side surface is concave. The reasonable combination of positive and negative refractive power and surface shape in the present application is conducive to controlling the trend of light rays, realizing the characteristics of ultra-wide angle, large image surface and high resolution, and can better meet the application requirements of the industry. In the exemplary embodiments, the first lens is a meniscus lens facing the image side, the refractive index N1 of the first lens is less than 1.55, and the effective half aperture of the object side surface of the first lens is greater than the effective half aperture of each lens in the lens group.

[0046] In exemplary embodiments, the set of contact elements of the optical imaging lens can include at least one of a first contact element, a second contact element, a third contact element, a fourth contact element, a fifth contact element, and a sixth contact element. The first contact element is disposed on the image side of the first lens and at least partially contacts the image side surface of the first lens. The second contact element is disposed on the image side of the second lens and at least partially contacts the image side surface of the second lens. The third contact element is disposed on the image side of the third lens and at least partially contacts the image side surface of the third lens. The fourth contact element is disposed on the image side of the fourth lens and at least partially contacts the image side surface of the fourth lens. The fifth contact element is disposed on the image side of the fifth lens and at least partially contacts the image side surface of the fifth lens. The sixth contact element is disposed on the image side of the sixth lens and at least partially contacts the image side surface of the sixth lens. It should be understood that the number of contact elements is not specifically limited in the present application, and any number of contact elements can be included between any two lenses, and any number of contact elements can be included in the entire optical imaging lens. The contact elements help the optical imaging lens to intercept the excess catadioptric light path, and reduce the generation of stray light and ghosting. The auxiliary contact between the contact element and the lens barrel helps to improve the poor assembly stability and low performance yield caused by large step difference between lenses.

[0047] In exemplary embodiments, the set of contact elements can include a second contact element, a fourth contact element, a fifth contact element, and a sixth contact element.

[0048] In exemplary embodiments, the optical imaging lens according to the present application can satisfy: 0.9 < f / tan(Semi-FOV) < 1.5, where f is the effective focal length of the optical imaging lens, and Semi-FOV is the maximum half field of view of the optical imaging lens.

[0049] In exemplary embodiments, the maximum half field of view Semi-FOV of the optical imaging lens according to the present application can be in the range of 70° to 75°.

[0050] In exemplary embodiments, the optical imaging lens according to the present application can satisfy: 2.6 < L / (CT1+CT2+CT3) < 3.0, 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, and L is the maximum height of the lens barrel in the direction of the optical axis.

[0051] In exemplary embodiments, the optical imaging lens according to the present application can satisfy: 2.2 < d0s / D2s x N1 < 2.8, where d0s is the inner diameter of the object side end surface of the lens barrel, D2s is the outer diameter of the object side surface of the second contact element, and N1 is the refractive index of the first lens.

[0052] The optical imaging lens according to the exemplary embodiments of the present application is a seven-piece ultra-wide-angle lens, which is beneficial to control the light trend by reasonable positive and negative light focus and surface type matching, realizes the characteristics of ultra-wide-angle and high resolution, and can better meet the industry application requirements, and the effective focal length f of the optical imaging lens and the maximum half field angle Semi-FOV of the optical imaging lens satisfy: 0.9 < f / tan(Semi-FOV) < 1.5; the first lens is a meniscus lens towards the image side, the refractive index N1 of the first lens is less than 1.55, and the effective half aperture of the object side of the first lens is greater than the effective half aperture of each lens in the lens group, the first lens, the second lens and the third lens occupy most of the space inside the lens barrel, which is beneficial to better realize the ultra-wide-angle characteristic and shorten the overall lens size, but it will cause the front lens to have a large volume, the displacement of the lens assembly under pressure is large and the rear end of the lens is seriously pressed, thereby affecting the assembly stability. In the exemplary embodiments, in order to ensure the hardness of the first lens, the first lens can be made of glass. Since the weight of the glass lens is higher than that of the plastic material lens, it will increase the displacement of the lens assembly under pressure and the severity of the pressure on the rear end of the lens. By controlling 2.6 < L / (CT1+CT2+CT3) < 3.0 and 2.2 < d0s / D2s x N1 < 2.8 in the range, the volume and spatial distribution of the first three lenses can be ensured, the lens gravity center will not be offset, and the ratio of the inner diameter of the object side end of the lens barrel to the outer diameter of the object side surface of the second bearing piece and the refractive index of the first lens can be controlled, so as to ensure the required hardness of the first lens, control the radial step difference between the first lens and the second lens within a reasonable range, and be beneficial to the pressure position of the distributed lens, reduce the pressure of the front lens on the rear lens, increase the stability of the first lens, the second lens and the third lens, and improve the overall assembly stability of the lens.

[0053] By controlling 2.6 < L / (CT1+CT2+CT3) < 3.0 and 2.2 < d0s / D2s x N1 < 2.8 in the range, the optical imaging lens provided by the present application has the technical advantages of ultra-wide-angle and large image surface, and has good assembly stability, which can better meet the industry application requirements.

[0054] The technical solutions of the present application will be further described below in combination with Figures 2A-2C to illustrate the effect of the present application on improving the overall assembly stability of the lens. Figures 2A-2C The pressure deformation displacement schematic diagrams of the optical imaging lens according to the present application under three conditions of Semi-FOV = 72° are shown, which can directly show the possible deformation displacement of the lens assembly under pressure, wherein the positive value represents the movement towards the object side, the negative value represents the movement towards the image side, the deeper the color, the larger the displacement of the lens, and the greater the deformation pressure it bears.

[0055] Figure 2Ais a deformation displacement schematic diagram of an optical imaging lens satisfying d0s / D2s x N1 = 1.5 and (D2m-D4s) / CT4 = 0.5, Figure 2A In the middle, the colors of the first lens to the sixth lens are lighter, and the color of the seventh lens is darker, which indicates that when the values of d0s / D2s x N1 and (D2m-D4s) / CT4 are less than the control range of the present application, the displacement of the seventh lens is obviously larger than that of other lenses, that is, the pressure is concentrated on the seventh lens at the rear end of the lens, which further causes poor overall assembly stability.

[0056] Figure 2B is a deformation displacement schematic diagram of an optical imaging lens satisfying d0s / D2s x N1 = 2.5 and (D2m-D4s) / CT4 = 1.5, Figure 2B In the middle, the colors of the lenses are lighter and more uniform, which indicates that when the values of d0s / D2s x N1 and (D2m-D4s) / CT4 are within the control range of the present application, the relative displacement of each lens is smaller, the pressure distribution is more uniform, and through the control of the positions of the front and middle parts of the lens, the pressure on the rear part of the lens is reduced, the stability of the first lens, the second lens and the third lens is increased, and the overall assembly stability of the lens is improved.

[0057] Figure 2C is a deformation displacement schematic diagram of an optical imaging lens satisfying d0s / D2s x N1 = 3.0 and (D2m-D4s) / CT4 = 3.0, Figure 2C In the middle, the color distribution of each lens is uneven, and the colors of the first lens and the second lens are darker, which indicates that when the values of d0s / D2s x N1 and (D2m-D4s) / CT4 are greater than the control range of the present application, the deformation displacement of the first lens and the second lens under pressure is larger, the pressure on the front part of the lens is concentrated, and the overall assembly stability is poor.

[0058] The optical imaging lens according to the exemplary embodiments of the present application is a seven-piece type ultra-wide-angle large image surface lens, which comprises a lens barrel, and a lens group and a bearing piece group arranged in the lens barrel, wherein the lens group comprises, in sequence from the object side to the image side along the optical axis, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens, wherein the first lens is a meniscus lens with negative refractive power and faces the image side, the second lens has positive refractive power, the third lens has positive refractive power, the object side surface of the third lens is concave, and the image side surface of the third lens is convex, the fourth lens has positive refractive power, the object side surface of the fourth lens is convex, and the image side surface of the fourth lens is convex, the fifth lens has negative refractive power, the object side surface of the fifth lens is concave, and the image side surface of the fifth lens is concave, the sixth lens has positive refractive power, the object side surface of the sixth lens is convex, and the image side surface of the sixth lens is convex, and the seventh lens has negative refractive power, the object side surface of the seventh lens is convex, and the image side surface of the seventh lens is concave; the bearing piece group comprises a fourth bearing piece arranged on the image side of the fourth lens and at least partially in contact with the image side surface of the fourth lens; the effective half aperture of the object side surface of the fourth lens is smaller than the effective half aperture of each lens in the lens group; the inner diameter d0s of the object side end surface of the lens barrel, the outer diameter D4m of the image side surface of the fourth bearing piece, the effective half aperture DT11 of the object side surface of the first lens and the effective half aperture DT41 of the object side surface of the fourth lens satisfy 1.6 < (d0s-D4m) / (DT11-DT41) < 2.1, and by reasonably matching the positive and negative refractive powers and the surface shapes and by the relatively large radial size of the first lens, the ultra-wide-angle feature is achieved, but the effective half aperture of the object side surface of the first lens is too large, which affects the bearing between the lenses and the molding of the lenses, and in the present application, the ratio of the difference between the inner diameter of the object side surface of the lens barrel and the outer diameter of the image side surface of the fourth bearing piece to the difference between the effective half apertures of the first lens and the fourth lens is controlled within a reasonable range, so that the maximum radial segment difference of the lens can be effectively controlled, the overall radial size of the other lenses is reasonably distributed, the problem that the effective radial area is affected due to the too short structure area of the lenses or the problem that the molding of the lenses is difficult due to the too long structure area of the other lenses in order to match the height of the first lens is avoided.

[0059] In the exemplary embodiments, the optical imaging lens according to the present application can satisfy 0.9 < (D2m-D4s) / CT4 < 2.1, where D2m is the outer diameter of the image side surface of the second bearing piece, D4s is the outer diameter of the object side surface of the fourth bearing piece, and CT4 is the central thickness of the fourth lens on the optical axis. Satisfying 0.9 < (D2m-D4s) / CT4 < 2.1 can ensure that the radial segment difference from the second lens to the fourth lens is within a reasonable range and ensure the central strength of the fourth lens, the control of the front and middle positions of the lens can reduce the pressure on the rear part of the lens, increase the bearing stability of the first lens, the second lens and the third lens, improve the overall assembly stability of the lens, and ensure that the structural gravity center of the lens does not deviate.

[0060] In exemplary embodiments, the optical imaging lens according to the present application can satisfy: 2.5mm < DT11-DT21 < 5mm, where DT11 is the effective half aperture of the object side of the first lens, and DT21 is the effective half aperture of the object side of the second lens. Since this lens is an ultra-wide-angle lens, in order to shorten the total length of the system, the radial size of the first lens and the second lens is large, and the effective half aperture of the first lens and the second lens satisfies 2.5mm < DT11-DT21 < 5mm, which can ensure that the lens center of gravity is not offset due to the excessively large radial size of the object side of the first lens, and the large-angle refraction effect of the light rays in the full field of view after passing through the first lens, so that the angle of the light rays entering the second lens tends to be gentle, and finally ensures the rationality and stability of the ultra-wide-angle lens under the requirement of the specified size.

[0061] In exemplary embodiments, the optical imaging lens according to the present application can satisfy: 32.0 < CT3 / CT2+T23 / CP2 < 34.0, where CT3 is the center thickness of the third lens on the optical axis, CT2 is the center thickness of the second lens on the optical axis, T23 is the air gap between the second lens and the third lens on the optical axis, and CP2 is the maximum thickness of the second supporting part along the optical axis. When the center thicknesses of the third lens and the second lens, the gap and the second supporting part satisfy 32.0 < CT3 / CT2+T23 / CP2 < 34.0, the sensitivity to the gap between the second lens and the third lens is reduced, and the MTF yield is improved.

[0062] In exemplary embodiments, the optical imaging lens according to the present application can satisfy: 1.9 < (R2 / CT1) / N1 < 2.7 and 10.0 < d2s / CP2 / V2 < 15.5, where R2 is the curvature radius of the image side of the first lens, CT1 is the center thickness of the first lens on the optical axis, N1 is the refractive index of the first lens, d2s is the inner diameter of the object side of the second supporting part, CP2 is the maximum thickness of the second supporting part along the optical axis, and V2 is the Abbe number of the second lens. Satisfying 1.9 < (R2 / CT1) / N1 < 2.7 and 10.0 < d2s / CP2 / V2 < 15.5, by controlling the refractive index, center thickness and surface shape of the first lens, the Abbe number of the second lens, the maximum thickness and the inner diameter of the object side of the second supporting part, the processing formability of the first lens and the aperture range of the second supporting part are ensured, which can effectively prevent the excess light from entering the third lens, and effectively reduce the occurrence of stray light.

[0063] In exemplary embodiments, the optical imaging lens according to the present application can satisfy: -7.2 < (R9+R10) / (d5s-d4s) < -2.8, wherein R9 is the curvature radius of the object side surface of the fifth lens, R10 is the curvature radius of the image side surface of the fifth lens, d4s is the inner diameter of the object side surface of the fourth bearing, and d5s is the inner diameter of the object side surface of the fifth bearing. By controlling the curvature radius of the object side surface and the image side surface of the fifth lens and the inner diameters of the fourth and fifth bearings within the condition -7.2 < (R9+R10) / (d5s-d4s) < -2.8, the refraction angle of the light passing through the fifth lens is controlled, and the fourth and fifth bearings can effectively reduce the generation of internal stray light of the fourth lens.

[0064] In exemplary embodiments, the optical imaging lens according to the present application can satisfy: 0.6 < f4 / N4 / d4m < 1.0, wherein f4 is the effective focal length of the fourth lens, N4 is the refractive index of the fourth lens, and d4m is the inner diameter of the image side surface of the fourth bearing. When the focal length, the refractive index of the fourth lens, and the change of the aperture of the fourth bearing satisfy 0.6 < f4 / N4 / d4m < 1.0, the overall surface shape and the medium thickness size of the fourth lens can be ensured to be within a range that is beneficial to molding. At the same time, the inner diameter of the fourth bearing further controls the path of the subsequent light in the optical imaging lens, and prevents the emission of excess stray light.

[0065] In exemplary embodiments, the optical imaging lens according to the present application can satisfy: 0.6 < (d6m-d6s) / (f6 / R12) < 1.0, wherein d6m is the inner diameter of the image side surface of the sixth bearing, d6s is the inner diameter of the object side surface of the sixth bearing, f6 is the effective focal length of the sixth lens, and R12 is the curvature radius of the image side surface of the sixth lens. By satisfying 0.6 < (d6m-d6s) / (f6 / R12) < 1.0, the aperture of the sixth bearing and the focal length and the curvature radius of the image side surface of the sixth lens are controlled within a suitable range, the refraction of the light by the sixth lens is controlled, and the inner diameters of the object side surface and the image side surface of the sixth bearing are beneficial to the stability of the assembly of the space front and rear lenses and effectively block the light, thereby reducing the influence of stray light.

[0066] In exemplary embodiments, the effective half aperture of the object side surface of the fourth lens of the optical imaging lens according to the present application is smaller than the effective half aperture of each lens in the lens set, and can satisfy 1.6 < (d0s-D4m) / (DT11-DT41) < 2.1, wherein d0s is the inner diameter of the object side end surface of the lens barrel, D4m is the outer diameter of the image side surface of the fourth bearing, DT11 is the effective half aperture of the object side surface of the first lens, and DT41 is the effective half aperture of the object side surface of the fourth lens. Satisfying 1.6 < (d0s-D4m) / (DT11-DT41) < 2.1 controls the ratio of the difference between the inner diameter of the object side surface of the lens barrel and the outer diameter of the image side surface of the fourth bearing to the difference between the effective half apertures of the first lens and the fourth lens within a reasonable range, effectively controls the maximum radial segment difference value of the lens, reasonably allocates the overall radial size of the other lenses, avoids the problem that the effective radial area is affected by the too short lens structure area, or the other lens structure area is too long in order to match the height of the first lens, resulting in a greater difficulty in lens molding.

[0067] In exemplary embodiments, the optical imaging lens according to the present application can satisfy 1.0 ≤ CP6 / CT6 < 1.5, wherein CP6 is the maximum thickness of the sixth bearing along the optical axis direction, and CT6 is the center thickness of the sixth lens on the optical axis. Satisfying 1.0 ≤ CP6 / CT6 < 1.5 controls the ratio of the thickness of the sixth bearing to the center thickness of the sixth lens within this range, which can effectively ensure the assembly stability of the last two lens groups through the setting of the bearing when the segment difference between the sixth lens and the seventh lens is large.

[0068] In exemplary embodiments, the optical imaging lens according to the present application can satisfy -3.2 < TD / (d0m-d0s) < -2.5, wherein TD is the distance between the object side surface of the first lens and the image side surface of the seventh lens on the optical axis, d0m is the inner diameter of the image side end surface of the lens barrel, and d0s is the inner diameter of the object side end surface of the lens barrel. Satisfying -3.2 < TD / (d0m-d0s) < -2.5 can effectively control the overall height of the lens barrel. Since this lens is a “three-piece plus four-piece two-end assembly” structure, this condition can also control the inner diameters of the object side end surface and the image side end surface of the lens barrel, so that the effective light can pass through, and the overall size of the lens is not too large.

[0069] In exemplary embodiments, the optical imaging lens according to the present application can satisfy: 2.0 < TD / EP24 < 3.1, 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 seventh lens, and EP24 is the distance along the optical axis direction from the image side surface of the second supporting member to the object side surface of the fourth supporting member. Satisfying 2.0 < TD / EP24 < 3.1, by controlling the total length of the optical imaging lens and the distance from the image side surface of the second supporting member to the object side surface of the fourth supporting member, it is beneficial to reasonably allocate the internal space of the lens barrel while controlling the total length of the system.

[0070] In exemplary embodiments, the optical imaging lens according to the present application has at least one inflection point on the object side surface or the image side surface of the seventh lens, and can satisfy: -3.8 < d0m / (f7 / (R13+R14)) < -1.5, where d0m is the inner diameter of the image side end surface of the lens barrel, f7 is the effective focal length of the seventh lens, R13 is the radius of curvature of the object side surface of the seventh lens, and R14 is the radius of curvature of the image side surface of the seventh lens. Satisfying -3.8 < d0m / (f7 / (R13+R14)) < -1.5, by controlling the ratio of the inner diameter of the image side surface of the lens barrel to the radius of curvature of the seventh lens, the optical aperture of the seventh lens can be effectively ensured; at the same time, the radii of curvature of the two surfaces of the seventh lens are controlled, the rationality of the lens surface shape is ensured, and the mold processing type and forming stability of the seventh lens are beneficial.

[0071] In exemplary embodiments, the optical imaging lens according to the present application can satisfy: 0.8 < (f2 / f3) / (D2s / d2s) < 3.5, where f2 is the effective focal length of the second lens, f3 is the effective focal length of the third lens, D2s is the outer diameter of the object side surface of the second supporting member, and d2s is the inner diameter of the object side surface of the second supporting member. Satisfying 0.8 < (f2 / f3) / (D2s / d2s) < 3.5 can control the effective focal lengths of the second lens and the third lens within a reasonable range, thereby finally producing a certain limiting effect on the surface curvature of the second lens and the third lens, ensuring the rationality of mold processing, and at the same time, the outer diameter and the inner diameter of the second supporting member can be reasonably controlled, ensuring the possibility of eliminating internal stray light penetrating the second lens and the third lens by the second supporting member.

[0072] In exemplary embodiments, the optical imaging lens according to the present application can satisfy: 69.5 < (CP6 / CP5) + (T67 / T56) < 80, wherein CP6 is the maximum thickness of the sixth bearing part along the optical axis, CP5 is the maximum thickness of the fifth bearing part along the optical axis, T67 is the air gap between the sixth lens and the seventh lens along the optical axis, and T56 is the air gap between the fifth lens and the sixth lens along the optical axis. Satisfying 69.5 < (CP6 / CP5) + (T67 / T56) < 80 ensures the thickness of the fifth bearing part and the sixth bearing part, indirectly ensures the range of the thickness of the sixth lens, is beneficial to the processability of the sixth lens, and controls the air gap and the thickness of the bearing part, which is beneficial to the forming of the bearing part and ensures the stability of the overall rear lens group structure.

[0073] In exemplary embodiments, the minimum aperture d0smin of the lens barrel in the direction perpendicular to the optical axis is less than 3.1 mm, which is beneficial to the constraint of the size of the stop aperture of the ultra-wide-angle lens and can determine the structure of the overall optical system to a certain extent and affect the minimum forming size of the lens barrel.

[0074] In exemplary embodiments, the minimum aperture d0smin of the lens barrel in the direction perpendicular to the optical axis is located between the third lens and the fourth lens, that is, the aperture of the part of the inner wall of the lens barrel between the third lens and the fourth lens is the smallest. Placing the stop between the third lens and the fourth lens ensures the required imaging magnification and reasonably ensures the image height range of the full field of view, and improves the imaging quality of off-axis points.

[0075] In the embodiments of the present application, at least one of the mirror surfaces of the lenses is a non-spherical mirror surface, that is, at least one of the object side surface of the first lens to the image side surface of the seventh lens is a non-spherical mirror surface. The non-spherical mirror lens has the characteristic that the curvature continuously changes from the center of the lens to the periphery of the lens. Unlike the spherical mirror lens having a constant curvature from the center of the lens to the periphery of the lens, the non-spherical mirror lens has better curvature radius characteristics and has the advantages of improving the distortion aberration and improving the astigmatism aberration. After using the non-spherical mirror lens, the aberration that occurs during imaging can be eliminated as much as possible, thereby improving the imaging quality. Alternatively, the object side surface and the image side surface of all the lenses from the first lens to the seventh lens are non-spherical mirror surfaces.

[0076] In exemplary embodiments, the above optical imaging lens can further include a filter for correcting color deviation and / or a protective glass for protecting the photosensitive elements located on the imaging surface.

[0077] The optical imaging lens according to the above embodiments of this application can employ multiple lens elements, such as the seven elements mentioned above. By rationally allocating the optical power, surface shape, and arrangement of the supporting components of each lens element, the range of each stop in the lens-tube fit is made more uniform, enhancing the light-gathering ability and improving the imaging quality of the ultra-wide-angle, large-image-plane optical imaging lens. However, those skilled in the art should understand that the number of lens elements constituting the optical imaging lens can be changed without departing from the technical solution claimed in this application to obtain the various results and advantages described in this specification. For example, although seven lens elements are described as an example in the embodiments, the optical imaging lens is not limited to including seven lens elements. If necessary, the optical imaging lens may also include other numbers of lens elements.

[0078] Specific embodiments of the optical imaging lens applicable to the above-described embodiments are further described below with reference to the accompanying drawings. Specifically, refer to... Figures 3A-4C Description of optical imaging lenses 1001 and 1002 according to embodiments 1 and 2 of this application; see reference Figures 5A-6C Description of optical imaging lenses 2001 and 2002 according to embodiments 3 and 4 of this application; see reference Figures 7A-8C The optical imaging lenses 3001 and 3002 according to embodiments 5 and 6 of this application are described.

[0079] Example 1

[0080] Figure 3A A schematic diagram of the structure of an optical imaging lens 1001 according to Embodiment 1 of this application is shown. Figure 3A As shown, the optical imaging lens 1001 includes a lens barrel P0, lens groups E1 to E7, and a support assembly. The optical imaging lens 1001 also includes an aperture stop STO (not shown) disposed between the third and fourth lens elements.

[0081] like Figure 3A As shown, the lens group of the optical imaging lens 1001, from the object side to the image side, includes: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, and a seventh lens E7. The first lens E1 has an object-side surface S1 and an image-side surface S2. The second lens E2 has an object-side surface S3 and an image-side surface S4. The third lens E3 has an object-side surface S5 and an image-side surface S6. The fourth lens E4 has an object-side surface S7 and an image-side surface S8. The fifth lens E5 has an object-side surface S9 and an image-side surface S10. The sixth lens E6 has an object-side surface S11 and an image-side surface S12. The seventh lens E7 has an object-side surface S13 and an image-side surface S14. The filter E8 has an object-side surface S15 and an image-side surface S16. Light from the object passes sequentially through each surface S1 to S16 and is finally imaged onto the imaging surface S17 (not shown).

[0082] Table 1 shows a basic parameter table of the lens group of the optical imaging lens 1001 of Example 1, wherein the units of the radius of curvature, the thickness and the effective focal length are all millimeters (mm).

[0083]

[0084] Table 1

[0085] In Example 1, the object side and the image side of any one of the first lens E1 to the seventh lens E7 are aspherical surfaces, and the surface type x of each aspherical lens can be defined by, but not limited to, the following aspherical surface formula:

[0086]

[0087] wherein x is the sag of the aspherical surface at a height h along the optical axis from the vertex of the aspherical surface; c is the paraxial curvature of the aspherical surface, c = 1 / R (i.e., the paraxial curvature c is the inverse of the radius of curvature R in Table 1 above); k is the conic coefficient; Ai is the correction coefficient of the i-th order of the aspherical surface. Table 2 gives the high-order coefficients A4, A6, A8, A10 and A12 that can be used for each aspherical surface S1-S14 in Example 1. 10 12 14 16

[0088]

[0089]

[0090] Table 2

[0091] Table 3 shows the numerical values of the effective focal length f and the maximum half field angle Semi-FOV of the optical imaging lens 1001.

[0092] Parameter f (mm) Semi-FOV (°) Value 3.88 71.24

[0093] Table 3

[0094] As Figure 3A ​​​​As shown in Table 4, the units of the parameters in Table 4 are millimeters (mm). The above-mentioned abutments can block the entry of external light, make the lens and the lens barrel better abut, and enhance the structural stability of the optical imaging lens 1001.

[0095] Parameter d2s D2s D2m d4s D4m d5s d6s d6m d0s d0m Value 5.530 9.329 9.329 3.920 6.334 4.874 5.363 6.950 16.290 10.538 Parameter CP2 EP24 CP5 CP6 d0min DT11 DT12 DT21 DT22 DT41 Value 0.018 6.696 0.018 1.176 2.967 6.76 3.49 3.36 2.78 1.50 Parameter DT42 L D4s d4m Value 1.98 14.881 6.334 3.9198

[0096] Table 4

[0097] Example 2

[0098] Figure 3B As shown in Table 4, the units of the parameters in Table 4 are millimeters (mm). The above-mentioned abutments can block the entry of external light, make the lens and the lens barrel better abut, and enhance the structural stability of the optical imaging lens 1001.

[0099] As Figure 3B shown, the optical imaging lens 1002 includes a lens barrel P0, lens groups E1-E7, and an abutment group. The optical imaging lens 1002 further includes a stop STO (not shown) arranged between the third lens and the fourth lens. The lens groups of the optical imaging lens 1002 are exactly the same as the lens groups of the optical imaging lens 1001 of Embodiment 1, and the basic parameters are shown in Tables 1-3, which will not be described again.

[0100] As Figure 3B shown, the optical imaging lens 1002 includes a lens barrel P0, lens groups E1-E7, and an abutment group. The optical imaging lens 1002 further includes a stop STO (not shown) arranged between the third lens and the fourth lens. The lens groups of the optical imaging lens 1002 are exactly the same as the lens groups of the optical imaging lens 1001 of Embodiment 1, and the basic parameters are shown in Tables 1-3, which will not be described again. As shown in Table 5, the units of the parameters in Table 5 are millimeters (mm). The above-mentioned abutments can block the entry of external light, make the lens and the lens barrel better abut, and enhance the structural stability of the optical imaging lens 1002.

[0101] Parameter d2s D2s D2m d4s D4m d5s d6s d6m d0s d0m Value 5.607 9.629 9.629 3.920 6.950 4.934 5.423 6.950 16.332 10.838 Parameter CP2 EP24 CP5 CP6 d0min DT11 DT12 DT21 DT22 DT41 Value 0.018 6.696 0.018 1.176 2.967 6.76 3.49 3.36 2.78 1.50 Parameter DT42 L D4s d4m Value 1.98 14.881 6.950 3.9198

[0102] Table 5

[0103] Figure 4A On-axis chromatic aberration curves of the optical imaging lens 1001 of Embodiment 1 and the optical imaging lens 1002 of Embodiment 2 are shown, which represent the deviation of light rays of different wavelengths after passing through the lens. Figure 4B Astigmatism curves of the optical imaging lens 1001 of Embodiment 1 and the optical imaging lens 1002 of Embodiment 2 are shown, which represent the meridional image curvature and sagittal image curvature. Figure 4C Magnification chromatic aberration curves of the optical imaging lens 1001 of Embodiment 1 and the optical imaging lens 1002 of Embodiment 2 are shown, which represent the deviation of light rays on different image heights after passing through the lens. According to Figures 4A-4C It can be seen that the optical imaging lens 1001 and the optical imaging lens 1002 given by Embodiment 1 and Embodiment 2 can achieve good imaging quality.

[0104] Example 3

[0105] Figure 5A A structure schematic diagram of an optical imaging lens 2001 according to Embodiment 3 of the present application is shown. As Figure 5A shown, the optical imaging lens 2001 includes a lens barrel P0, lens groups E1-E7, and a support group. The optical imaging lens 2001 further includes a stop STO (not shown) disposed between the third lens and the fourth lens.

[0106] As Figure 5A shown, the lens groups of the optical imaging lens 2001 sequentially include, from the object side to the image side, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, and a seventh lens E7. The first lens E1 has an object side surface S1 and an image side surface S2. The second lens E2 has an object side surface S3 and an image side surface S4. The third lens E3 has an object side surface S5 and an image side surface S6. The fourth lens E4 has an object side surface S7 and an image side surface S8. The fifth lens E5 has an object side surface S9 and an image side surface S10. The sixth lens E6 has an object side surface S11 and an image side surface S12. The seventh lens E7 has an object side surface S13 and an image side surface S14. The filter E8 has an object side surface S15 and an image side surface S16. Light from an object sequentially passes through each surface S1-S16 and is finally imaged on an imaging surface S17 (not shown).

[0107] Table 6 shows the basic parameters of the lens group of the optical imaging lens 2001 of Example 3, wherein the units of the radius of curvature, the thickness and the effective focal length are millimeters (mm). Table 7 shows the high-order term coefficients of the aspherical surfaces in Example 3, wherein each aspherical surface can be defined by the formula (1) given in Example 1.

[0108]

[0109]

[0110] Table 6

[0111] Face Number A4 A6 A8 A10 A12 A14 A16 S1 -3.61E-04 9.53E-05 -6.63E-06 2.75E-07 -6.76E-09 9.20E-11 -5.30E-13 S2 -4.01E-03 9.44E-04 -2.65E-04 5.38E-05 -6.83E-06 4.67E-07 -1.32E-08 S3 7.76E-03 -1.29E-03 1.87E-04 -3.04E-05 2.40E-06 -6.47E-08 0.00E+00 S4 1.61E-02 -2.50E-03 5.29E-04 -9.28E-05 2.34E-06 1.20E-06 -1.03E-07 S5 2.62E-03 -2.67E-03 8.23E-04 -2.43E-04 4.54E-05 -4.51E-06 1.81E-07 S6 -1.69E-02 1.40E-02 -7.93E-03 3.26E-03 -8.49E-04 1.25E-04 -7.69E-06 S7 -1.34E-02 1.70E-02 -1.36E-02 9.11E-03 -4.04E-03 1.02E-03 -1.09E-04 S8 1.14E-03 -3.28E-03 5.91E-03 -4.29E-03 2.14E-03 -5.81E-04 6.73E-05 S9 -9.35E-03 -1.24E-02 9.88E-03 -4.88E-03 1.83E-03 -4.33E-04 4.57E-05 S10 -9.89E-03 -1.51E-03 8.82E-04 8.99E-05 -1.27E-04 2.76E-05 -1.99E-06 S11 -1.87E-02 1.00E-02 -4.96E-03 1.74E-03 -3.84E-04 4.74E-05 -2.57E-06 S12 -1.93E-02 5.48E-03 -1.14E-03 2.00E-04 -1.61E-05 0.00E+00 0.00E+00 S13 -4.05E-02 2.40E-03 -3.00E-04 6.33E-05 -9.14E-06 7.34E-07 -2.30E-08 S14 -3.59E-02 4.11E-03 -3.61E-04 2.11E-05 -7.62E-07 1.26E-08 7.93E-12

[0112] Table 7

[0113] Table 8 shows the numerical values of the effective focal length f and the maximum half field angle Semi-FOV of the optical imaging lens 2001.

[0114] Parameter f (mm) Semi-FOV (°) Value 3.89 71.23

[0115] Table 8

[0116] As Figure 5A shown, the optical imaging lens 2001 further includes four abutments, i.e., a second abutment P2, a fourth abutment P4, a fifth abutment P5 and a sixth abutment P6. The second abutment P2 is disposed on the image side of the second lens and at least partially contacts the image side surface of the second lens; the fourth abutment P4 is disposed on the image side of the fourth lens and at least partially contacts the image side surface of the fourth lens; the fifth abutment P5 is disposed on the image side of the fifth lens and at least partially contacts the image side surface of the fifth lens; and the sixth abutment P6 is disposed on the image side of the sixth lens and at least partially contacts the image side surface of the sixth lens. Table 9 shows the basic parameters of the abutments of the optical imaging lens 2001, wherein the units of the parameters in Table 9 are millimeters (mm). The abutments can block the entry of external stray light, make the lens better abut with the lens barrel, and enhance the structural stability of the optical imaging lens 2001.

[0117] Parameter d2s D2s D2m d4s D4m d5s d6s d6m d0s d0m Value 4.674 9.329 9.329 3.381 6.247 4.397 5.323 6.972 15.098 10.594 Parameter CP2 EP24 CP5 CP6 d0min DT11 DT12 DT21 DT22 DT41 Value 0.018 4.691 0.018 1.117 2.888 6.14 3.22 3.15 2.46 1.46 Parameter DT42 L D4s d4m Value 1.66 13.459 6.247 3.3813

[0118] Table 9

[0119] Example 4

[0120] Figure 5B Fig. 6 shows a structure diagram of an optical imaging lens 2002 according to Example 4 of the present application. In this and the following examples, some similar descriptions as those in Example 3 will be omitted for brevity.

[0121] As Figure 5BAs shown, the optical imaging lens 2002 includes a lens barrel P0, lens groups E1 to E7, and a support assembly. The optical imaging lens 2002 also includes an aperture stop STO (not shown) disposed between the third and fourth lens groups. The lens groups of the optical imaging lens 2002 are exactly the same as those of the optical imaging lens 2001 in Embodiment 3, and their basic parameters are detailed in Tables 6 to 8, and will not be repeated here.

[0122] like Figure 5B As shown, the optical imaging lens 2002 also includes four support members: a second support member P2, a fourth support member P4, a fifth support member P5, and a sixth support member P6. The second support member P2 is positioned on the image side of the second lens and at least partially contacts the image side of the second lens; the fourth support member P4 is positioned on the image side of the fourth lens and at least partially contacts the image side of the fourth lens; the fifth support member P5 is positioned on the image side of the fifth lens and at least partially contacts the image side of the fifth lens; and the sixth support member P6 is positioned on the image side of the sixth lens and at least partially contacts the image side of the sixth lens. Table 10 shows the basic parameters of the support members of the optical imaging lens 2002, where all parameters are in millimeters (mm). These support members can block excess external light from entering, allowing for better support between the lens and the lens barrel, and enhancing the structural stability of the optical imaging lens 2002.

[0123] Parameter d2s D2s D2m d4s D4m d5s d6s d6m d0s d0m Value 4.774 9.569 9.569 3.476 6.447 4.497 5.423 6.972 15.098 10.594 Parameter CP2 EP24 CP5 CP6 d0min DT11 DT12 DT21 DT22 DT41 Value 0.018 4.691 0.018 1.087 2.988 6.14 3.22 3.15 2.46 1.46 Parameter DT42 L D4s d4m Value 1.66 13.459 6.447 3.4756

[0124] Table 10

[0125] Figure 6A The on-axis chromatic aberration curves of the optical imaging lens 2001 of Embodiment 3 and the optical imaging lens 2002 of Embodiment 4 are shown, which indicate the deviation of the focal point of light of different wavelengths after passing through the lens. Figure 6B The astigmatism curves of the optical imaging lens 2001 of Embodiment 3 and the optical imaging lens 2002 of Embodiment 4 are shown, which represent the meridional image plane curvature and the sagittal image plane curvature. Figure 6C The magnification chromatic aberration curves of the optical imaging lens 2001 of Embodiment 3 and the optical imaging lens 2002 of Embodiment 4 are shown, representing the deviations in image height at different points on the imaging plane after light passes through the lens. According to Figures 6A-6C It can be seen that the optical imaging lens 2001 and optical imaging lens 2002 given in Embodiments 3 and 4 can achieve good imaging quality.

[0126] Example 5

[0127] Figure 7A A schematic diagram of the structure of an optical imaging lens 3001 according to Embodiment 5 of this application is shown. Figure 7AAs shown, the optical imaging lens 3001 includes a lens barrel P0, lens groups E1 to E7, and a support assembly. The optical imaging lens 3001 also includes an aperture stop STO (not shown) disposed between the third and fourth lens elements.

[0128] like Figure 7A As shown, the lens group of the optical imaging lens 3001, from the object side to the image side, includes: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, and a seventh lens E7. The first lens E1 has an object-side surface S1 and an image-side surface S2. The second lens E2 has an object-side surface S3 and an image-side surface S4. The third lens E3 has an object-side surface S5 and an image-side surface S6. The fourth lens E4 has an object-side surface S7 and an image-side surface S8. The fifth lens E5 has an object-side surface S9 and an image-side surface S10. The sixth lens E6 has an object-side surface S11 and an image-side surface S12. The seventh lens E7 has an object-side surface S13 and an image-side surface S14. The filter E8 has an object-side surface S15 and an image-side surface S16. Light from the object passes sequentially through each surface S1 to S16 and is finally imaged onto the imaging surface S17 (not shown).

[0129] Table 11 shows the basic parameters of the lens group of the optical imaging lens 3001 in Embodiment 5, wherein the units of radius of curvature, thickness and effective focal length are millimeters (mm). Table 12 shows the higher-order coefficients that can be used for each aspherical mirror in Embodiment 5, wherein each aspherical surface shape can be defined by formula (1) given in Embodiment 1 above.

[0130]

[0131]

[0132] Table 11

[0133] Face Number A4 A6 A8 A10 A12 A14 A16 S1 -6.06E-04 1.24E-04 -8.36E-06 3.38E-07 -8.15E-09 1.09E-10 -6.21E-13 S2 -4.59E-03 9.06E-04 -2.68E-04 5.62E-05 -7.24E-06 4.96E-07 -1.40E-08 S3 8.14E-03 -1.52E-03 2.23E-04 -3.36E-05 2.57E-06 -6.88E-08 0.00E+00 S4 1.49E-02 -2.39E-03 5.11E-04 -8.29E-05 4.02E-07 1.24E-06 -9.26E-08 S5 2.03E-03 -2.44E-03 7.56E-04 -2.21E-04 4.02E-05 -3.79E-06 1.44E-07 S6 -1.59E-02 1.19E-02 -6.10E-03 2.37E-03 -5.87E-04 8.19E-05 -4.61E-06 S7 -1.23E-02 1.49E-02 -1.16E-02 8.09E-03 -3.71E-03 9.61E-04 -1.05E-04 S8 8.51E-04 -4.14E-03 6.41E-03 -4.38E-03 2.12E-03 -5.65E-04 6.54E-05 S9 -7.67E-03 -1.58E-02 1.20E-02 -5.57E-03 1.89E-03 -4.07E-04 4.03E-05 S10 -8.33E-03 -4.65E-03 3.25E-03 -9.27E-04 1.25E-04 -6.11E-06 -1.31E-07 S11 -1.85E-02 9.01E-03 -4.33E-03 1.53E-03 -3.50E-04 4.47E-05 -2.52E-06 S12 -1.82E-02 4.99E-03 -1.02E-03 1.84E-04 -1.55E-05 0.00E+00 0.00E+00 S13 -4.24E-02 2.61E-03 -3.12E-04 6.31E-05 -9.04E-06 7.23E-07 -2.26E-08 S14 -3.86E-02 4.64E-03 -4.32E-04 2.76E-05 -1.14E-06 2.54E-08 -1.77E-10

[0134] Table 12

[0135] Table 13 shows the values ​​of the effective focal length f and the maximum semi-FOV of the optical imaging lens 3001.

[0136] Parameter f (mm) Semi-FOV (°) Value 3.89 74.97

[0137] Table 13

[0138] like Figure 7AAs shown in Table 14, the basic parameters of the optical imaging lens 3001 are shown in Table 14, and the units of the parameters in Table 14 are millimeters (mm). The above-mentioned abutments can block the entry of external excess light, make the lens and the lens barrel better abut, and enhance the structural stability of the optical imaging lens 3001.

[0139] Parameter d2s D2s D2m d4s D4m d5s d6s d6m d0s d0m Value 4.874 9.329 9.329 3.312 6.247 4.324 5.278 6.862 15.404 10.606 Parameter CP2 EP24 CP5 CP6 d0min DT11 DT12 DT21 DT22 DT41 Value 0.018 4.544 0.018 1.228 2.879 6.16 3.22 3.15 2.46 1.46 Parameter DT42 L D4s d4m Value 1.65 13.459 6.247 3.3119

[0140] Table 14

[0141] Example 6

[0142] Figure 7B As shown in Table 14, the basic parameters of the optical imaging lens 3001 are shown in Table 14, and the units of the parameters in Table 14 are millimeters (mm). The above-mentioned abutments can block the entry of external excess light, make the lens and the lens barrel better abut, and enhance the structural stability of the optical imaging lens 3001.

[0143] As Figure 7B shown, the optical imaging lens 3002 includes a lens barrel P0, lens groups E1-E7, and an abutment group. The optical imaging lens 3002 further includes a stop STO (not shown) disposed between the third lens and the fourth lens. The lens groups of the optical imaging lens 3002 are exactly the same as the lens groups of the optical imaging lens 3001 of Embodiment 5, and the basic parameters are shown in Tables 11-13, which will not be described again.

[0144] As Figure 7B shown, the optical imaging lens 3002 includes a lens barrel P0, lens groups E1-E7, and an abutment group. The optical imaging lens 3002 further includes a stop STO (not shown) disposed between the third lens and the fourth lens. The lens groups of the optical imaging lens 3002 are exactly the same as the lens groups of the optical imaging lens 3001 of Embodiment 5, and the basic parameters are shown in Tables 11-13, which will not be described again.

[0144] As Figure 7B shown, the optical imaging lens 3002 includes a lens barrel P0, lens groups E1-E7, and an abutment group. The optical imaging lens 3002 further includes a stop STO (not shown) disposed between the third lens and the fourth lens. The lens groups of the optical imaging lens 3002 are exactly the same as the lens groups of the optical imaging lens 3001 of Embodiment 5, and the basic parameters are shown in Tables 11-13, which will not be described again.

[0145] Parameter d2s D2s D2m d4s D4m d5s d6s d6m d0s d0m Value 4.934 9.629 9.629 3.369 6.547 4.384 5.338 6.862 15.404 10.906 Parameter CP2 EP24 CP5 CP6 d0min DT11 DT12 DT21 DT22 DT41 Value 0.018 4.544 0.018 1.228 2.879 6.16 3.22 3.15 2.46 1.46 Parameter DT42 L D4s d4m Value 1.65 13.459 6.547 3.3693

[0146] Table 15

[0147] Figure 8A On-axis chromatic aberration curves of the optical imaging lens 3001 of Embodiment 5 and the optical imaging lens 3002 of Embodiment 6 are shown, which represent the deviation of light rays of different wavelengths after passing through the lens. Figure 8B Astigmatism curves of the optical imaging lens 3001 of Embodiment 5 and the optical imaging lens 3002 of Embodiment 6 are shown, which represent the meridional image curvature and sagittal image curvature. Figure 8C Magnification chromatic aberration curves of the optical imaging lens 3001 of Embodiment 5 and the optical imaging lens 3002 of Embodiment 6 are shown, which represent the deviation of light rays on different image heights after passing through the lens. According to Figures 8A-8C It can be seen that the optical imaging lens 3001 and the optical imaging lens 3002 given by Embodiment 5 and Embodiment 6 can achieve good imaging quality.

[0148] In summary, the optical imaging lenses of Embodiment 1 to Embodiment 6 satisfy the relationships shown in Table 16.

[0149]

[0150]

[0151] Table 16

[0152] The present application also provides an imaging device, the electronic photosensitive element of which can be a charge-coupled device (CCD) or a complementary metal-oxide-semiconductor device (CMOS). The imaging device can be a standalone imaging apparatus such as a digital camera, or an imaging module integrated on a mobile electronic device such as a mobile phone. The imaging device is equipped with the optical imaging lens described above.

[0153] The above description is merely preferred embodiments of the present application and a description of the principles of the technology used. It should be understood by those skilled in the art that the scope of the application involved in the present application is not limited to the technical solutions formed by the specific combinations of the technical features described above, and should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the above features can be replaced with technical features disclosed in the present application (but not limited to) having similar functions to form technical solutions.

Claims

1. An optical imaging lens, characterized in that, The optical imaging lens comprises: a lens barrel, a lens set and a support set arranged in the lens barrel, wherein the lens set comprises, in sequence from the object side to the image side along the optical axis, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens, the first lens is a meniscus lens with a negative refractive power, the object side surface of which is convex and the image side surface of which is concave, the second lens has a positive refractive power, the third lens has a positive refractive power, the object side surface of which is concave and the image side surface of which is convex, the fourth lens has a positive refractive power, the object side surface of which is convex and the image side surface of which is convex, the fifth lens has a negative refractive power, the object side surface of which is concave and the image side surface of which is concave, the sixth lens has a positive refractive power, the object side surface of which is convex and the image side surface of which is convex, and the seventh lens has a negative refractive power, the object side surface of which is convex and the image side surface of which is concave; the support set comprises a fourth support arranged on the image side of the fourth lens and at least partially in contact with the image side surface of the fourth lens; the effective half aperture of the object side surface of the fourth lens is smaller than the effective half aperture of each lens in the lens set; the inner diameter d0s of the object side end surface of the lens barrel, the outer diameter D4m of the image side surface of the fourth support, the effective half aperture DT11 of the object side surface of the first lens and the effective half aperture DT41 of the object side surface of the fourth lens satisfy: 1.78≤(d0s-D4m) / (DT11-DT41)≤1.95; the minimum aperture d0smin of the lens barrel in the direction perpendicular to the optical axis is located between the third lens and the fourth lens; the number of lenses with refractive power in the optical imaging lens is seven. 2.The optical imaging lens according to claim 1, wherein, the support set further comprises a second support arranged on the image side of the second lens and at least partially in contact with the image side surface of the second lens; the outer diameter D2m of the image side surface of the second support, the outer diameter D4s of the object side surface of the fourth support and the central thickness CT4 of the fourth lens on the optical axis satisfy: 1.09≤(D2m-D4s) / CT4≤1.

94.

3. The optical imaging lens according to claim 1, wherein the effective half aperture DT11 of the object side surface of the first lens and the effective half aperture DT21 of the object side surface of the second lens satisfy: 2.5mm<DT11-DT21<5mm. 4.The optical imaging lens according to claim 1, wherein, the support set further comprises a second support arranged on the image side of the second lens and at least partially in contact with the image side surface of the second lens; the central thickness CT3 of the third lens on the optical axis, the central thickness CT2 of the second lens on the optical axis, the air gap T23 between the second lens and the third lens on the optical axis and the maximum thickness CP2 of the second support in the direction of the optical axis satisfy: 32.46≤CT3 / CT2+T23 / CP2≤33.

92.

5. The optical imaging lens according to claim 3, characterized in that, the support set further comprises a second support arranged on the image side of the second lens and at least partially in contact with the image side surface of the second lens; The radius of curvature R2 of the image side surface of the first lens, the central thickness CT1 of the first lens on the optical axis, and the refractive index N1 of the first lens satisfy: 2.08≤(R2 / CT1) / N1≤2.56; and The inner diameter d2s of the object side surface of the second abutting member, the maximum thickness CP2 of the second abutting member in the direction of the optical axis, and the Abbe number V2 of the second lens satisfy: 10.45≤d2s / CP2 / V2≤15.

26. 6.The optical imaging lens according to claim 1, wherein, The abutting member set further includes a fifth abutting member disposed on the image side of the fifth lens and at least partially in contact with the image side surface of the fifth lens; The radius of curvature R9 of the object side surface of the fifth lens, the radius of curvature R10 of the image side surface of the fifth lens, the inner diameter d4s of the object side surface of the fourth abutting member, and the inner diameter d5s of the object side surface of the fifth abutting member satisfy: -7.41≤(R9+R10) / (d5s-d4s)≤-3.

07. 7.The optical imaging lens according to claim 1, wherein, The effective focal length f4 of the fourth lens, the refractive index N4 of the fourth lens, and the inner diameter d4m of the image side surface of the fourth abutting member satisfy: 0.85≤f4 / N4 / d4m≤0.

94. 8.The optical imaging lens according to claim 1, wherein, The optical imaging lens further includes a sixth abutting member disposed on the image side of the sixth lens and at least partially in contact with the image side surface of the sixth lens; The inner diameter d6m of the image side surface of the sixth abutting member, the inner diameter d6s of the object side surface of the sixth abutting member, the effective focal length f6 of the sixth lens, and the radius of curvature R12 of the image side surface of the sixth lens satisfy: -2.40mm≤(d6m-d6s) / (f6 / R12)≤-1.87mm.

9. The optical imaging lens according to claim 7, wherein The abutting member set further includes a second abutting member disposed on the image side of the second lens and at least partially in contact with the image side surface of the second lens; The inner diameter d0s of the object side end surface of the lens barrel, the outer diameter D2s of the object side surface of the second abutting member, and the refractive index N1 of the first lens satisfy: 2.39≤d0s / D2s×N1≤2.

65.

10. The optical imaging lens according to claim 8, wherein The maximum thickness CP6 of the sixth abutting member in the direction of the optical axis and the central thickness CT6 of the sixth lens on the optical axis satisfy: 1.06≤CP6 / CT6≤1.

34.

11. The optical imaging lens according to claim 1, characterized in that, The distance TD of the object side surface of the first lens to the image side surface of the seventh lens on the optical axis, the inner diameter d0m of the image side end surface of the lens barrel, and the inner diameter d0s of the object side end surface of the lens barrel satisfy: -3.02≤TD / (d0m-d0s)≤-2.

73. 12.The optical imaging lens according to claim 1, wherein, The abutting member set further includes a second abutting member disposed on the image side of the second lens and at least partially in contact with the image side surface of the second lens; The distance TD of the object side surface of the first lens to the image side surface of the seventh lens on the optical axis and the distance EP24 of the image side surface of the second abutting member to the object side surface of the fourth abutting member in the direction of the optical axis satisfy: 2.34≤TD / EP24≤2.

96.

13. The optical imaging lens according to claim 1, characterized in that, the object side surface or the image side surface of the seventh lens has at least one inflection point; the inner diameter d0m of the image side end surface of the lens barrel, the effective focal length f7 of the seventh lens, the curvature radius R13 of the object side surface of the seventh lens, and the curvature radius R14 of the image side surface of the seventh lens satisfy: -3.54mm≤d0m / (f7 / (R13+R14))≤-1.14mm. 14.The optical imaging lens according to claim 1, wherein, the supporting piece set further comprises a second supporting piece arranged on the image side of the second lens and at least partially in contact with the image side surface of the second lens; the effective focal length f2 of the second lens, the effective focal length f3 of the third lens, the outer diameter D2s of the object side surface of the second supporting piece, and the inner diameter d2s of the object side surface of the second supporting piece satisfy: 1.07≤(f2 / f3) / (D2s / d2s)≤3.

15.

15. The optical imaging lens according to claim 1, characterized in that, the optical imaging lens further comprises a fifth supporting piece arranged on the image side of the fifth lens and at least partially in contact with the image side surface of the fifth lens, and a sixth supporting piece arranged on the image side of the sixth lens and at least partially in contact with the image side surface of the sixth lens; and the maximum thickness CP6 of the sixth supporting piece along the direction of the optical axis, the maximum thickness CP5 of the fifth supporting piece along the direction of the optical axis, the air gap T67 of the sixth lens and the seventh lens on the optical axis, and the air gap T56 of the fifth lens and the sixth lens on the optical axis satisfy: 70.05≤(CP6 / CP5)+(T67 / T56)≤79.

11.

16. The optical imaging lens according to any of claims 1-15, characterized in that, the minimum aperture d0smin of the lens barrel in the direction perpendicular to the optical axis is less than 3.1mm.

17. The optical imaging lens according to any of claims 1-15, characterized in that, the refractive index N1 of the first lens is less than 1.55, and the effective half aperture of the object side surface thereof is greater than the effective half aperture of each lens in the lens set.

18. The optical imaging lens according to any one of claims 1-15, wherein the effective focal length f of the optical imaging lens and the maximum half field angle Semi-FOV of the optical imaging lens satisfy: 1.04mm≤f / tan(Semi-FOV)≤1.32mm.

19. The optical imaging lens according to any one of claims 1-15, wherein the central thickness CT1 of the first lens on the optical axis, the central thickness CT2 of the second lens on the optical axis, the central thickness CT3 of the third lens on the optical axis, and the maximum height L of the lens barrel along the direction of the optical axis satisfy: 2.73≤L / (CT1+CT2+CT3)≤2.80.

Images