Camera lens

Abstract

The present application discloses a camera lens comprising, in order from the object side to the image side along the optical axis: a first lens having negative optical power; a second lens having optical power; a third lens having optical power; a fourth lens having positive optical power; a fifth lens having positive optical power; a sixth lens having optical power; and a seventh lens having optical power. The total effective focal length f of the camera lens, the effective focal length f2 of the second lens, and the effective focal length fi of the i-th lens satisfy the following: |f / f2|>|f / fi|, where i is selected from 1, 3, 4, 5, 6, or 7.

Description

Technical Field

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

[0002] In recent years, with the increasing popularity of smart devices like smartphones and robot vacuums, users have increasingly demanded higher image quality from these devices. Currently, most cameras on these devices are trending towards wider angles. For example, obstacle avoidance devices require a wider field of view. Furthermore, given the need for these devices to operate in the dark, they also have higher requirements for light transmission.

[0003] Therefore, how to design a camera lens with wide angle and high light throughput has become one of the difficult problems that many lens designers need to solve urgently. Summary of the Invention

[0004] In one aspect, the present application provides a camera lens comprising, in order from the object side to the image side along the optical axis, a first lens having negative optical power; a second lens having optical power; a third lens having optical power; a fourth lens having positive optical power; a fifth lens having positive optical power; a sixth lens having optical power; and a seventh lens having optical power. The total effective focal length f of the camera lens, the effective focal length f2 of the second lens, and the effective focal length fi of the i-th lens may satisfy the following: |f / f2|>|f / fi|, where i is selected from 1, 3, 4, 5, 6, or 7.

[0005] In one embodiment, at least one of the mirror surfaces from the object side surface of the first lens to the image side surface of the seventh lens is an aspherical mirror surface.

[0006] In one embodiment, the total effective focal length f of the camera lens, the effective focal length f1 of the first lens, and the effective focal length fj of the j-th lens may satisfy: |f / f1|<|f / fj|, where j is selected from 2, 3, 4, 5, 6 or 7.

[0007] In one embodiment, the chromatic aberration coefficient V of the m-th lens and the refractive index N of the m-th lens may satisfy: 20<V / N<35, wherein the m-th lens is one of the first to seventh lenses.

[0008] In one embodiment, the distance SAG21 from the intersection of the object side surface of the second lens and the optical axis to the vertex of the maximum effective radius of the object side surface of the second lens on the optical axis and the distance Y21 from the critical point of the object side surface of the second lens at the off-axis position to the intersection of the object side surface of the second lens and the optical axis on the optical axis may satisfy: (SAG21+Y21)≤0.25mm.

[0009] In one embodiment, the distance SAG61 from the intersection of the object side surface of the sixth lens and the optical axis to the maximum effective radius vertex of the object side surface of the sixth lens on the optical axis and the edge thickness ET6 of the sixth lens at the maximum effective radius may satisfy: -0.8<SAG61 / ET6<-0.5.

[0010] In one embodiment, a distance SAG71 from the intersection of the object-side surface of the seventh lens and the optical axis to the maximum effective radius vertex of the object-side surface of the seventh lens on the optical axis and a center thickness CT7 of the seventh lens on the optical axis may satisfy: 0.7<SAG71 / CT7<1.0.

[0011] In one embodiment, the distance SAG11 from the intersection of the object side surface of the first lens and the optical axis to the vertex of the maximum effective radius of the object side surface of the first lens on the optical axis, the distance SAG12 from the intersection of the image side surface of the first lens and the optical axis to the vertex of the maximum effective radius of the image side surface of the first lens on the optical axis, and the edge thickness ET1 of the first lens at the maximum effective radius may satisfy: 0<(SAG12-SAG11) / ET1<0.4.

[0012] In one embodiment, the distance SAG22 from the intersection of the image side surface of the second lens and the optical axis to the vertex of the maximum effective radius of the image side surface of the second lens on the optical axis, the distance SAG31 from the intersection of the object side surface of the third lens and the optical axis to the vertex of the maximum effective radius of the object side surface of the third lens on the optical axis, and the air gap T23 between the second lens and the third lens on the optical axis may satisfy: 1.0≤(SAG22-T23) / (SAG31-T23)≤1.1.

[0013] In one embodiment, an edge thickness ET2 of the second lens at the maximum effective radius and a center thickness CT2 of the second lens on the optical axis may satisfy: 1.5<ET2 / CT2<3.1.

[0014] In one embodiment, an edge thickness ET7 of the seventh lens at the maximum effective radius and a center thickness CT7 of the seventh lens on the optical axis may satisfy: 2.0<CT7 / ET7≤3.0.

[0015] In one embodiment, the camera lens further includes an aperture stop disposed between the third lens and the fourth lens, and the effective radius DTs of the aperture stop, the effective radius DT11 of the object side surface of the first lens, and the effective radius DT72 of the image side surface of the seventh lens may satisfy: 1.5<(DT11-DTs) / (DT72-DTs)<2.5.

[0016] In one embodiment, the effective radius DT11 of the object side surface of the first lens, the effective radius DT12 of the image side surface of the first lens, the effective radius DT21 of the object side surface of the second lens, and the effective radius DT22 of the image side surface of the second lens may satisfy: 1.4<(DT11-DT21) / (DT12-DT22)<2.0.

[0017] In one embodiment, the total effective focal length f of the camera lens, the center thickness CT4 of the fourth lens on the optical axis, the center thickness CT5 of the fifth lens on the optical axis, and the center thickness CT7 of the seventh lens on the optical axis may satisfy: 2.5<f / CT4+f / CT5+f / CT7<3.5.

[0018] In one embodiment, the center thickness CT4 of the fourth lens, the center thickness CT5 of the fifth lens, and the center thickness CT7 of the seventh lens on the optical axis may satisfy: 0.9<(CT5-CT7) / (CT5-CT4)<1.3.

[0019] In one embodiment, the total effective focal length f of the camera lens and the combined focal length f23 of the second lens and the third lens may satisfy: -3.5≤f23 / f<-2.5.

[0020] In one embodiment, the total effective focal length f of the camera lens and the combined focal length f56 of the fifth lens and the sixth lens may satisfy: 0<f / f56≤0.2.

[0021] In one embodiment, the total effective focal length f of the camera lens and the curvature radius R3 of the object-side surface of the second lens may satisfy: -1.0<f / R3<0.

[0022] In one embodiment, the total effective focal length f of the camera lens and the curvature radius R5 of the object-side surface of the third lens may satisfy: 0<f / R5<1.5.

[0023] In one embodiment, the total effective focal length f of the camera lens and the curvature radius R12 of the image-side surface of the sixth lens element may satisfy: -1.0<f / R12<0.

[0024] In one embodiment, at least one lens among the first to seventh lenses is a glass lens, and the glass lens is a spherical lens or an aspherical lens.

[0025] In one embodiment, the maximum field of view FOV of the camera lens and the F number Fno of the camera lens may satisfy: 0.9<Fno / tan(FOV / 4)<1.5.

[0026] In one embodiment, the distance TTL from the object side surface of the first lens to the imaging surface of the camera lens on the optical axis and the maximum field of view FOV of the camera lens may satisfy the following relationship: 3.0 mm < TTL / tan(FOV / 3) < 6.0 mm.

[0027] Another aspect of the present application provides an imaging lens comprising, in order from the object side to the image side along the optical axis: a first lens having negative optical power; a second lens having optical power; a third lens having optical power; a fourth lens having positive optical power; a fifth lens having positive optical power; a sixth lens having optical power; and a seventh lens having optical power. An edge thickness ET7 of the seventh lens at its maximum effective radius and a center thickness CT7 of the seventh lens on the optical axis may satisfy the following: 2.0 < CT7 / ET7 ≤ 3.0.

[0028] In one embodiment, the total effective focal length f of the camera lens, the effective focal length f1 of the first lens, and the effective focal length fj of the j-th lens may satisfy: |f / f1|<|f / fj|, where j is selected from 2, 3, 4, 5, 6 or 7.

[0029] In one embodiment, the chromatic aberration coefficient V of the m-th lens and the refractive index N of the m-th lens may satisfy: 20<V / N<35, wherein the m-th lens is one of the first to seventh lenses.

[0030] In one embodiment, the distance SAG21 from the intersection of the object side surface of the second lens and the optical axis to the vertex of the maximum effective radius of the object side surface of the second lens on the optical axis and the distance Y21 from the critical point of the object side surface of the second lens at the off-axis position to the intersection of the object side surface of the second lens and the optical axis on the optical axis may satisfy: (SAG21+Y21)≤0.25mm.

[0031] In one embodiment, the distance SAG61 from the intersection of the object side surface of the sixth lens and the optical axis to the maximum effective radius vertex of the object side surface of the sixth lens on the optical axis and the edge thickness ET6 of the sixth lens at the maximum effective radius may satisfy: -0.8<SAG61 / ET6<-0.5.

[0032] In one embodiment, a distance SAG71 from the intersection of the object-side surface of the seventh lens and the optical axis to the maximum effective radius vertex of the object-side surface of the seventh lens on the optical axis and a center thickness CT7 of the seventh lens on the optical axis may satisfy: 0.7<SAG71 / CT7<1.0.

[0033] In one embodiment, the distance SAG11 from the intersection of the object side surface of the first lens and the optical axis to the vertex of the maximum effective radius of the object side surface of the first lens on the optical axis, the distance SAG12 from the intersection of the image side surface of the first lens and the optical axis to the vertex of the maximum effective radius of the image side surface of the first lens on the optical axis, and the edge thickness ET1 of the first lens at the maximum effective radius may satisfy: 0<(SAG12-SAG11) / ET1<0.4.

[0034] In one embodiment, the distance SAG22 from the intersection of the image side surface of the second lens and the optical axis to the vertex of the maximum effective radius of the image side surface of the second lens on the optical axis, the distance SAG31 from the intersection of the object side surface of the third lens and the optical axis to the vertex of the maximum effective radius of the object side surface of the third lens on the optical axis, and the air gap T23 between the second lens and the third lens on the optical axis may satisfy: 1.0≤(SAG22-T23) / (SAG31-T23)≤1.1.

[0035] In one embodiment, an edge thickness ET2 of the second lens at the maximum effective radius and a center thickness CT2 of the second lens on the optical axis may satisfy: 1.5<ET2 / CT2<3.1.

[0036] In one embodiment, the camera lens further includes an aperture stop disposed between the third lens and the fourth lens, and the effective radius DTs of the aperture stop, the effective radius DT11 of the object side surface of the first lens, and the effective radius DT72 of the image side surface of the seventh lens may satisfy: 1.5<(DT11-DTs) / (DT72-DTs)<2.5.

[0037] In one embodiment, the effective radius DT11 of the object side surface of the first lens, the effective radius DT12 of the image side surface of the first lens, the effective radius DT21 of the object side surface of the second lens, and the effective radius DT22 of the image side surface of the second lens may satisfy: 1.4<(DT11-DT21) / (DT12-DT22)<2.0.

[0038] In one embodiment, the total effective focal length f of the camera lens, the center thickness CT4 of the fourth lens on the optical axis, the center thickness CT5 of the fifth lens on the optical axis, and the center thickness CT7 of the seventh lens on the optical axis may satisfy: 2.5<f / CT4+f / CT5+f / CT7<3.5.

[0039] In one embodiment, the center thickness CT4 of the fourth lens, the center thickness CT5 of the fifth lens, and the center thickness CT7 of the seventh lens on the optical axis may satisfy: 0.9<(CT5-CT7) / (CT5-CT4)<1.3.

[0040] In one embodiment, the total effective focal length f of the camera lens and the combined focal length f23 of the second lens and the third lens may satisfy: -3.5≤f23 / f<-2.5.

[0041] In one embodiment, the total effective focal length f of the camera lens and the combined focal length f56 of the fifth lens and the sixth lens may satisfy: 0<f / f56≤0.2.

[0042] In one embodiment, the total effective focal length f of the camera lens and the curvature radius R3 of the object-side surface of the second lens may satisfy: -1.0<f / R3<0.

[0043] In one embodiment, the total effective focal length f of the camera lens and the curvature radius R5 of the object-side surface of the third lens may satisfy: 0<f / R5<1.5.

[0044] In one embodiment, the total effective focal length f of the camera lens and the curvature radius R12 of the image-side surface of the sixth lens may satisfy: -1.0<f / R12<0.

[0045] In one embodiment, at least one lens among the first to seventh lenses is a glass lens, and the glass lens is a spherical lens or an aspherical lens.

[0046] In one embodiment, the maximum field of view FOV of the camera lens and the F number Fno of the camera lens may satisfy: 0.9<Fno / tan(FOV / 4)<1.5.

[0047] In one embodiment, the distance TTL from the object side surface of the first lens to the imaging surface of the camera lens on the optical axis and the maximum field of view FOV of the camera lens may satisfy the following relationship: 3.0 mm < TTL / tan(FOV / 3) < 6.0 mm.

[0048] In one embodiment, the total effective focal length f of the camera lens, the effective focal length f2 of the second lens, and the effective focal length fi of the i-th lens may satisfy: |f / f2|>|f / fi|, where i is selected from 1, 3, 4, 5, 6 or 7.

[0049] The present application provides a camera lens suitable for lightweight electronic products by reasonably allocating optical focal length and optimizing optical parameters, which has at least one of the beneficial effects of a large field of view, a large aperture, a small size, a high pixel count, and good imaging quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Other features, objects and advantages of the present application will become more apparent upon reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0051] Figure 11 shows a schematic structural diagram of a camera lens according to Example 1 of the present application;

[0052] Figure 2A and Figure 2B axial chromatic aberration curve and astigmatism curve of the imaging lens of Example 1 are respectively shown;

[0053] Figure 3 Schematic diagram of the structure of a camera lens according to embodiment 2 of the present application is shown;

[0054] Figure 4A and Figure 4B axial chromatic aberration curve and astigmatism curve of the imaging lens of Example 2 are respectively shown;

[0055] Figure 5 1 shows a schematic structural diagram of a camera lens according to Example 3 of the present application;

[0056] Figure 6A and Figure 6B axial chromatic aberration curve and astigmatism curve of the imaging lens of Example 3 are shown respectively;

[0057] Figure 7 1 shows a schematic structural diagram of a camera lens according to Example 4 of the present application;

[0058] Figure 8A and Figure 8B axial chromatic aberration curve and astigmatism curve of the imaging lens of Example 4 are respectively shown;

[0059] Figure 9 1 shows a schematic structural diagram of a camera lens according to Example 5 of the present application;

[0060] Figure 10A and Figure 10B axial chromatic aberration curve and astigmatism curve of the imaging lens of Example 5 are shown respectively;

[0061] Figure 11 A schematic structural diagram of a camera lens according to embodiment 6 of the present application is shown; and

[0062] Figure 12A and Figure 12B The axial chromatic aberration curve and the astigmatism curve of the imaging lens of Example 6 are respectively shown. DETAILED DESCRIPTION

[0063] For a better understanding of the present application, various aspects of the present application will be described in more detail with reference to the accompanying drawings. It should be understood that these detailed descriptions are merely descriptions of exemplary embodiments of the present application and are not intended to limit the scope of the present application in any way. Throughout the specification, the same reference numerals refer to the same elements. The expression "and / or" includes any and all combinations of one or more of the associated listed items.

[0064] It should be noted that in this specification, the terms "first," "second," "third," etc., are used solely to distinguish one feature from another and do not limit the features. Thus, the first lens discussed below could also be referred to as the second lens or the third lens without departing from the teachings of this application.

[0065] In the drawings, the thickness, size, and shape of the lenses are slightly exaggerated for ease of illustration. Specifically, the shapes of the spherical and aspherical surfaces shown in the drawings are provided by way of example. That is, the shapes of the spherical and aspherical surfaces are not limited to those shown in the drawings. The drawings are for illustration only and are not drawn strictly to scale.

[0066] In this article, the paraxial region refers to the area near the optical axis. If a lens surface is convex and the location of the convex surface is undefined, it means that the lens surface is convex at least in the paraxial region. If a lens surface is concave and the location of the concave surface is undefined, 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.

[0067] It should also be understood that the terms "comprises," "including," "having," "includes," and / or "comprising," when used in this specification, indicate the presence of the stated features, elements, and / or components, but do not preclude the presence or addition of one or more other features, elements, components, and / or combinations thereof. In addition, when expressions such as "at least one of..." appear after a list of listed features, they modify the entire list of features rather than modifying the individual elements in the list. In addition, when describing embodiments of the present application, "may" is used to mean "one or more embodiments of the present application." And, the term "exemplary" is intended to refer to an example or illustration.

[0068] Unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by those skilled in the art to which this application belongs. It should also be understood that terms (such as those defined in commonly used dictionaries) should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology and will not be interpreted in an idealized or overly formal sense unless expressly defined as such herein.

[0069] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0070] The features, principles and other aspects of the present application are described in detail below.

[0071] The imaging lens according to an exemplary embodiment of the present application may include seven lenses having 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 in order from the object side to the image side along the optical axis. An air gap may be provided between any two adjacent lenses among the first through seventh lenses.

[0072] In an exemplary embodiment of the present application, the first lens may have negative optical power; the second lens may have positive optical power or negative optical power; the third lens may have positive optical power or negative optical power; the fourth lens may have positive optical power; the fifth lens may have positive optical power; the sixth lens may have positive optical power or negative optical power; and the seventh lens may have positive optical power or negative optical power.

[0073] In an exemplary embodiment, the imaging lens according to the present application may satisfy the following relationship: |f / f2|>|f / fi|, where f is the total effective focal length of the imaging lens, f2 is the effective focal length of the second lens, and fi is the effective focal length of the i-th lens, where i is selected from 1, 3, 4, 5, 6, or 7. Satisfying |f / f2|>|f / fi| facilitates the rational allocation of the optical power of each lens and reduces lens aberrations.

[0074] In an exemplary embodiment, the imaging lens according to the present application may satisfy the following relationship: |f / f1| < |f / fj|, where f is the total effective focal length of the imaging lens, f1 is the effective focal length of the first lens, fj is the effective focal length of the j-th lens, and j is selected from 2, 3, 4, 5, 6, or 7. Satisfying |f / f1| < |f / fj| facilitates the rational allocation of the optical power of each lens and reduces lens aberrations.

[0075] In an exemplary embodiment, the camera lens according to the present application can satisfy the following conditions: 20 < V / N < 35, where V is the Abbe number of the m-th lens, and N is the refractive index of the m-th lens, which is one of the first through seventh lenses. Meeting this condition helps reduce chromatic aberration in the camera lens and improve image quality.

[0076] In an exemplary embodiment, the camera lens according to the present application may satisfy the following condition: (SAG21+Y21)≤0.25mm, where SAG21 is the distance from the intersection of the object side surface of the second lens and the optical axis to the vertex of the maximum effective radius of the object side surface of the second lens on the optical axis, and Y21 is the distance from the critical point of the object side surface of the second lens at the off-axis position to the intersection of the object side surface of the second lens and the optical axis on the optical axis. Specifically, the critical point Y21 of the object side surface of the second lens at the off-axis position is the point, other than the intersection of the object side surface of the second lens and the optical axis, at which the object side surface of the second lens is tangent to a plane perpendicular to the optical axis. Satisfying (SAG21+Y21)≤0.25mm is beneficial for controlling the shape of the second lens, so that the second lens meets processing requirements.

[0077] In an exemplary embodiment, the camera lens according to the present application may satisfy the following relationship: -0.8 < SAG61 / ET6 < -0.5, where SAG61 is the distance on the optical axis from the intersection of the object-side surface of the sixth lens element and the optical axis to the vertex of the maximum effective radius of the object-side surface of the sixth lens element, and ET6 is the edge thickness of the sixth lens element at the maximum effective radius. Meeting this condition facilitates controlling the shape of the sixth lens element and reduces lens manufacturing difficulty.

[0078] In an exemplary embodiment, the camera lens according to the present application may satisfy the following ratio: 0.7 < SAG71 / CT7 < 1.0, where SAG71 is the distance on the optical axis from the intersection of the object-side surface of the seventh lens element and the optical axis to the vertex of the maximum effective radius of the object-side surface of the seventh lens element, and CT7 is the center thickness of the seventh lens element on the optical axis. This ratio helps meet the processing requirements of the seventh lens element.

[0079] In an exemplary embodiment, the camera lens according to the present application may satisfy the following conditions: 0 < (SAG12 - SAG11) / ET1 < 0.4, where SAG11 is the distance from the intersection of the object-side surface of the first lens and the optical axis to the vertex of the maximum effective radius of the object-side surface of the first lens on the optical axis, SAG12 is the distance from the intersection of the image-side surface of the first lens and the optical axis to the vertex of the maximum effective radius of the image-side surface of the first lens on the optical axis, and ET1 is the edge thickness of the first lens at the maximum effective radius. Satisfying 0 < (SAG12 - SAG11) / ET1 < 0.4 facilitates controlling the shape of the first lens and reduces the difficulty of lens manufacturing.

[0080] In an exemplary embodiment, the camera lens according to the present application may satisfy the following: 1.0 ≤ (SAG22 - T23) / (SAG31 - T23) ≤ 1.1, where SAG22 is the distance on the optical axis from the intersection of the image-side surface of the second lens and the optical axis to the vertex of the maximum effective radius of the image-side surface of the second lens, SAG31 is the distance on the optical axis from the intersection of the object-side surface of the third lens and the optical axis to the vertex of the maximum effective radius of the object-side surface of the third lens, and T23 is the air spacing on the optical axis between the second and third lenses. Satisfying 1.0 ≤ (SAG22 - T23) / (SAG31 - T23) ≤ 1.1 facilitates controlling the shapes of the second and third lenses, ensuring that the second and third lenses meet processability and assembly requirements.

[0081] In an exemplary embodiment, the camera lens according to the present application may satisfy the following relationship: 1.5 < ET2 / CT2 < 3.1, where ET2 is the edge thickness of the second lens element at its maximum effective radius, and CT2 is the center thickness of the second lens element along the optical axis. More specifically, ET2 and CT2 may further satisfy the following relationship: 1.7 < ET2 / CT2 < 3.1. This relationship improves the processability of the second lens element, ensuring it meets molding requirements.

[0082] In an exemplary embodiment, the camera lens according to the present application may satisfy the following relationship: 2.0 < CT7 / ET7 ≤ 3.0, where ET7 is the edge thickness of the seventh lens element at its maximum effective radius, and CT7 is the center thickness of the seventh lens element along the optical axis. More specifically, CT7 and ET7 may further satisfy the following relationship: 2.3 < CT7 / ET7 ≤ 3.0. This relationship improves the processability of the seventh lens element, thereby meeting molding requirements.

[0083] In an exemplary embodiment, the imaging lens further includes an aperture stop disposed between the third lens element and the fourth lens element. The imaging lens according to the present application may satisfy the following conditions: 1.5 < (DT11 - DTs) / (DT72 - DTs) < 2.5, where DTs is the effective radius of the aperture stop, DT11 is the effective radius of the object-side surface of the first lens element, and DT72 is the effective radius of the image-side surface of the seventh lens element. More specifically, DT11, DTs, and DT72 may further satisfy the following conditions: 1.6 < (DT11 - DTs) / (DT72 - DTs) < 2.2. Satisfying 1.5 < (DT11 - DTs) / (DT72 - DTs) < 2.5 helps reduce light vignetting and improve relative illumination.

[0084] In an exemplary embodiment, the camera lens according to the present application may satisfy the following: 1.4 < (DT11 - DT21) / (DT12 - DT22) < 2.0, where DT11 is the effective radius of the object-side surface of the first lens, DT12 is the effective radius of the image-side surface of the first lens, DT21 is the effective radius of the object-side surface of the second lens, and DT22 is the effective radius of the image-side surface of the second lens. Satisfying 1.4 < (DT11 - DT21) / (DT12 - DT22) < 2.0 helps reduce the structural step difference between the first and second lenses, thereby improving the assembly stability of the first and second lenses.

[0085] In an exemplary embodiment, the camera lens according to the present application may satisfy the following: 2.5 < f / CT4 + f / CT5 + f / CT7 < 3.5, where f is the total effective focal length of the camera lens, CT4 is the center thickness of the fourth lens element on the optical axis, CT5 is the center thickness of the fifth lens element on the optical axis, and CT7 is the center thickness of the seventh lens element on the optical axis. More specifically, f, CT4, CT5, and CT7 may further satisfy the following: 2.7 < f / CT4 + f / CT5 + f / CT7 < 3.3. This 2.5 < f / CT4 + f / CT5 + f / CT7 < 3.5 not only facilitates achieving a wide field of view, but also helps keep the thicknesses of the fourth, fifth, and seventh lenses within a reasonable range, thereby reducing the overall length of the camera lens.

[0086] In an exemplary embodiment, the camera lens according to the present application may satisfy the following: 0.9 < (CT5 - CT7) / (CT5 - CT4) < 1.3, where CT4 is the center thickness of the fourth lens element on the optical axis, CT5 is the center thickness of the fifth lens element on the optical axis, and CT7 is the center thickness of the seventh lens element on the optical axis. Satisfying 0.9 < (CT5 - CT7) / (CT5 - CT4) < 1.3 helps reduce the overall length of the camera lens.

[0087] In an exemplary embodiment, the imaging lens according to the present application may satisfy the following relationship: -3.5 ≤ f23 / f < -2.5, where f is the total effective focal length of the imaging lens and f23 is the combined focal length of the second and third lenses. This condition facilitates the proper distribution of the optical power of the second and third lenses, improving imaging quality.

[0088] In an exemplary embodiment, the imaging lens according to the present application may satisfy the following: 0 < f / f56 ≤ 0.2, where f is the total effective focal length of the imaging lens and f56 is the combined focal length of the fifth and sixth lenses. This 0 < f / f56 ≤ 0.2 condition facilitates the proper distribution of the optical power of the fifth and sixth lenses, improving imaging quality.

[0089] In an exemplary embodiment, the imaging lens according to the present application may satisfy the following relationship: -1.0 < f / R3 < 0, where f is the total effective focal length of the imaging lens and R3 is the radius of curvature of the object-side surface of the second lens element. More specifically, f and R3 may further satisfy the following relationship: -0.7 < f / R3 < -0.3. This relationship, -1.0 < f / R3 < 0, facilitates controlling the shape of the second lens element, ensuring that it meets processability requirements.

[0090] In an exemplary embodiment, the imaging lens according to the present application may satisfy the following relationship: 0 < f / R5 < 1.5, where f is the total effective focal length of the imaging lens and R5 is the radius of curvature of the object-side surface of the third lens element. More specifically, f and R5 may further satisfy the following relationship: 0.8 < f / R5 < 1.3. This 0 < f / R5 < 1.5 requirement facilitates controlling the shape of the third lens element, ensuring that it meets processability requirements.

[0091] In an exemplary embodiment, the imaging lens according to the present application may satisfy the following relationship: -1.0 < f / R12 < 0, where f is the total effective focal length of the imaging lens and R12 is the radius of curvature of the image-side surface of the sixth lens element. More specifically, f and R12 may further satisfy the following relationship: -0.7 < f / R12 < -0.3. This relationship, -1.0 < f / R12 < 0, facilitates controlling the shape of the sixth lens element, ensuring that it meets processability requirements.

[0092] In an exemplary embodiment, at least one of the first through seventh lenses is a glass lens, and the glass lens is either a spherical lens or an aspherical lens. The inclusion of at least one glass lens in a camera lens helps mitigate lens temperature drift and ensures excellent imaging quality at varying temperatures.

[0093] In an exemplary embodiment, the camera lens according to the present application can satisfy the following conditions: 0.9 < Fno / tan (FOV / 4) < 1.5, where FOV is the maximum field of view of the camera lens, and Fno is the F number of the camera lens. Satisfying 0.9 < Fno / tan (FOV / 4) < 1.5 is conducive to achieving characteristics such as a large field of view and a large aperture. Specifically, a large field of view is conducive to widening the shooting range, and a large aperture is conducive to increasing the clear aperture of the camera lens to allow more light to enter the image plane, thereby improving the shooting effect in dark environments.

[0094] In an exemplary embodiment, the camera lens according to the present application may satisfy the following conditions: 3.0mm < TTL / tan(FOV / 3) < 6.0mm, where TTL is the distance on the optical axis from the object-side surface of the first lens to the imaging plane of the camera lens, and FOV is the maximum field of view of the camera lens. More specifically, TTL and FOV may further satisfy the following conditions: 3.3mm < TTL / tan(FOV / 3) < 5.8mm. Meeting 3.0mm < TTL / tan(FOV / 3) < 6.0mm facilitates achieving characteristics such as a large field of view and a small size. The large field of view helps expand the range of framing for capture.

[0095] In an exemplary embodiment, the camera lens according to the present application may satisfy: FOV>190°, where FOV is the maximum field of view of the camera lens. Satisfying FOV>190° is beneficial for widening the shooting range.

[0096] In an exemplary embodiment, the camera lens according to the present application further includes a filter for correcting color deviation and / or a protective glass for protecting the photosensitive element located on the imaging surface. The present application proposes a camera lens with the characteristics of a large field of view, a large aperture, a small size, a high pixel and a high imaging quality. The camera lens provided by the present application has a wide-angle characteristic, which can broaden the shooting range; at the same time, the camera lens also has a large aperture characteristic, which can meet the shooting needs in dark environments. The camera lens according to the above embodiment of the present application can adopt multiple lenses, such as the seven lenses mentioned above. By reasonably allocating the optical power, surface shape, center thickness of each lens and the on-axis spacing between each lens, etc., the incident light can be effectively converged, the total optical length of the imaging lens can be reduced and the machinability of the imaging lens can be improved, making the camera lens more conducive to production and processing.

[0097] In an embodiment of the present application, at least one of the mirror surfaces from the object side of the second lens to the image side of the seventh lens is an aspherical mirror surface. The characteristic of an aspherical lens is that the curvature changes continuously from the center of the lens to the periphery of the lens. Different from a spherical lens with a constant curvature from the center of the lens to the periphery of the lens, an aspherical lens has a better curvature radius characteristic, and has the advantages of improving distortion aberration and improving astigmatism aberration. After adopting an aspherical lens, the aberration that occurs when imaging can be eliminated as much as possible, thereby improving the imaging quality. Optionally, at least one of the object side and image side of each lens in the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens and the seventh lens is an aspherical mirror surface. Optionally, the object side and image side of each lens in the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens and the seventh lens are all aspherical mirror surfaces.

[0098] However, those skilled in the art will appreciate that the number of lenses comprising the imaging lens may be varied to achieve the various results and advantages described herein without departing from the claimed technical solutions. For example, while the embodiments describe seven lenses as an example, the imaging lens is not limited to including seven lenses. If desired, the imaging lens may also include other numbers of lenses.

[0099] Specific embodiments of the imaging lens applicable to the above-mentioned embodiments will be further described below with reference to the accompanying drawings.

[0100] Example 1

[0101] The following reference Figures 1 to 2B The imaging lens according to the first embodiment of the present application will be described. Figure 1 A schematic structural diagram of a camera lens according to embodiment 1 of the present application is shown.

[0102] like Figure 1 As shown, the camera lens includes, from the object side to the image side, a first lens E1, a second lens E2, a third lens E3, an aperture STO, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter E8 and an imaging surface S17.

[0103] The first lens E1 has negative optical power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative optical power, with its object-side surface S3 being concave and its image-side surface S4 being concave. The third lens E3 has positive 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 concave 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 convex. The sixth lens E6 has negative optical power, with its object-side surface S11 being concave and its image-side surface S12 being convex. The seventh lens E7 has positive 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 an object sequentially passes through surfaces S1 to S16 and is ultimately imaged on an imaging surface S17.

[0104] Table 1 shows basic parameters of the camera lens of Example 1, wherein the units of curvature radius, thickness / distance and focal length are all millimeters (mm).

[0105]

[0106] Table 1

[0107] In this example, the total effective focal length f of the camera lens is 1.44 mm, and the maximum field of view FOV of the camera lens is 213.0°.

[0108] In Example 1, the object-side surface and the image-side surface of any lens from the second lens E2 to the seventh lens E7 are both aspherical surfaces. The surface shape x of each aspherical lens can be defined by, but is not limited to, the following aspherical surface formula:

[0109]

[0110] Wherein, x is the distance vector height of the aspheric surface from the vertex of the aspheric surface at a height of h along the optical axis; c is the paraxial curvature of the aspheric surface, c = 1 / R (i.e., the paraxial curvature c is the reciprocal of the curvature radius R in Table 1 above); k is the conic coefficient; Ai is the correction coefficient of the i-th order of the aspheric surface. The following Tables 2-1 and 2-2 give the high-order coefficients A4, A6, A8, A9, A10, A11, A12, A13, A14, A15, A16, A17, A18, A19, A20, A21, A22, A23, A24, A25, A26, A27, A28, A29, A30, A31, A32, A33, A34, A35, A36, A37, A38, A39, A40, A41, A42, A43, A44, A45, A46, A47, A50, A51, A52, A53, A54, A55, A56, A57, A58, A59, A60, A61, A71, A72, A73, A74, A75, A80, A81, A9, A10, A11, A12, A13, A14, A15 10 、A 12 、A 14 、A 16 、A 18 、A 20 、A 22 、A 24 、A 26 、A 28 and A 30 .

[0111] Face number A4 A6 A8 A10 A12 A14 A16 S3 2.0847E-01 -1.8247E-01 1.2846E-01 -6.0006E-02 1.1838E-02 6.3105E-03 -6.7850E-03 S4 -8.1664E-01 7.4713E+00 -4.5879E+01 1.9340E+02 -5.6672E+02 1.1769E+03 -1.7566E+03 S5 -7.6232E-01 5.9557E+00 -3.6555E+01 1.5655E+02 -4.6624E+02 9.8460E+02 -1.4960E+03 S6 5.3767E-02 1.7403E-01 -1.7537E+00 1.5814E+01 -8.3752E+01 2.7725E+02 -5.8669E+02 S7 -1.2324E-02 8.8816E-02 -4.6056E-01 1.5112E+00 -3.0118E+00 3.5977E+00 -2.3760E+00 S8 -7.7609E-02 1.4768E-01 -2.3866E-01 2.6763E-01 -2.1053E-01 1.1310E-01 -3.9818E-02 S9 -8.3964E-02 1.6401E-01 -2.5794E-01 3.2197E-01 -3.1548E-01 2.4217E-01 -1.4589E-01 S10 -1.4684E-01 3.8112E-01 -1.3507E+00 2.5558E+00 -2.9512E+00 2.3049E+00 -1.2816E+00 S11 1.3998E-01 1.0173E-01 -1.0347E+00 2.3637E+00 -3.1188E+00 2.8050E+00 -1.8348E+00 S12 7.2277E-02 -5.0314E-03 6.7379E-02 -1.9532E-01 3.0313E-01 -3.1381E-01 2.2768E-01 S13 -1.6389E-01 1.6035E-01 -1.4642E-01 1.0297E-01 -5.2149E-02 1.8666E-02 -4.6378E-03 S14 -6.7828E-02 3.4728E-02 -1.3516E-02 -8.5009E-03 1.9213E-02 -1.5264E-02 7.2466E-03

[0112] Table 2-1

[0113] Face number A18 A20 A22 A24 A26 A28 A30 S3 3.1987E-03 -9.6220E-04 1.9692E-04 -2.7390E-05 2.4829E-06 -1.3239E-07 3.1502E-09 S4 1.8972E+03 -1.4798E+03 8.2297E+02 -3.1743E+02 8.0502E+01 -1.2046E+01 8.0412E-01 S5 1.6466E+03 -1.3106E+03 7.4508E+02 -2.9434E+02 7.6642E+01 -1.1811E+01 8.1529E-01 S6 7.6949E+02 -5.1578E+02 -7.2920E+01 4.7510E+02 -4.2040E+02 1.7198E+02 -2.8408E+01 S7 7.0031E-01 -3.2400E-02 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S8 8.3440E-03 -7.8890E-04 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S9 6.8736E-02 -2.4968E-02 6.8005E-03 -1.3306E-03 1.7508E-04 -1.3782E-05 4.8814E-07 S10 5.1866E-01 -1.5315E-01 3.2518E-02 -4.7997E-03 4.6254E-04 -2.5774E-05 6.1532E-07 S11 8.9461E-01 -3.2541E-01 8.6876E-02 -1.6464E-02 2.0891E-03 -1.5867E-04 5.4427E-06 S12 -1.1770E-01 4.3527E-02 -1.1426E-02 2.0780E-03 -2.4886E-04 1.7646E-05 -5.6101E-07 S13 7.6436E-04 -7.2275E-05 1.1149E-06 6.4061E-07 -8.3355E-08 4.6127E-09 -1.0116E-10 S14 -2.2929E-03 5.0176E-04 -7.6416E-05 7.9609E-06 -5.4125E-07 2.1640E-08 -3.8583E-10

[0114] Table 2-2

[0115] Figure 2A The axial chromatic aberration curve of the optical imaging lens of Example 1 is shown, which indicates the deviation of the focal point of light of different wavelengths passing through the lens. Figure 2B The astigmatism curve of the optical imaging lens of Example 1 is shown, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 2A and Figure 2B It can be seen that the camera lens provided in Example 1 can achieve good imaging quality.

[0116] Example 2

[0117] The following reference Figures 3 to 4B The camera lens according to Embodiment 2 of the present application is described. In this embodiment and the following embodiments, for the sake of brevity, some descriptions similar to those in Embodiment 1 will be omitted. Figure 3 A schematic structural diagram of a camera lens according to embodiment 2 of the present application is shown.

[0118] like Figure 3As shown, the camera lens includes, from the object side to the image side, a first lens E1, a second lens E2, a third lens E3, an aperture STO, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter E8 and an imaging surface S17.

[0119] The first lens E1 has negative optical power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative optical power, with its object-side surface S3 being concave and its image-side surface S4 being concave. The third lens E3 has positive 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 concave 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 convex. The sixth lens E6 has negative optical power, with its object-side surface S11 being concave and its image-side surface S12 being convex. The seventh lens E7 has positive 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 an object sequentially passes through surfaces S1 to S16 and is ultimately imaged on an imaging surface S17.

[0120] In this example, the total effective focal length f of the camera lens is 1.50 mm, and the maximum field of view FOV of the camera lens is 194.8°.

[0121] Table 3 shows the basic parameters of the camera lens of Example 2, where the units of curvature radius, thickness / distance, and focal length are all in millimeters (mm). Tables 4-1 and 4-2 show the high-order coefficients of the various aspherical mirror surfaces that can be used in Example 2, where the surface shapes of the various aspherical surfaces can be defined by formula (1) given in Example 1 above.

[0122]

[0123] Table 3

[0124]

[0125]

[0126] Table 4-1

[0127] Face number A18 A20 A22 A24 A26 A28 A30 S3 -3.9660E-03 4.4746E-04 -8.7019E-06 -5.7333E-06 9.2208E-07 -6.3425E-08 1.7408E-09 S4 1.6857E+03 -1.3243E+03 7.3713E+02 -2.8326E+02 7.1326E+01 -1.0570E+01 6.9735E-01 S5 1.2667E+03 -1.0304E+03 5.9414E+02 -2.3690E+02 6.2072E+01 -9.6103E+00 6.6605E-01 S6 -7.3174E+02 1.8757E+01 9.7880E+02 -1.3510E+03 9.1172E+02 -3.2212E+02 4.7627E+01 S7 5.6826E-01 -7.8764E-02 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S8 1.0094E-02 -8.8301E-04 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S9 1.5510E-01 -5.0565E-02 1.2145E-02 -2.0902E-03 2.4419E-04 -1.7347E-05 5.6505E-07 S10 5.7886E-01 -1.6265E-01 3.1225E-02 -3.8822E-03 2.7708E-04 -7.8841E-06 -8.2412E-08 S11 4.2476E-01 -1.3903E-01 3.2652E-02 -5.4360E-03 6.1596E-04 -4.3027E-05 1.4077E-06 S12 -2.5186E-01 8.2103E-02 -1.9518E-02 3.2783E-03 -3.6789E-04 2.4716E-05 -7.5096E-07 S13 -1.5043E-03 3.2685E-04 -4.9900E-05 5.2485E-06 -3.6217E-07 1.4754E-08 -2.6876E-10 S14 -6.8436E-03 1.3140E-03 -1.8051E-04 1.7291E-05 -1.0963E-06 4.1329E-08 -7.0083E-10

[0128] Table 4-2

[0129] Figure 4A The axial chromatic aberration curve of the optical imaging lens of Example 2 is shown, which indicates the deviation of the focal point of light of different wavelengths passing through the lens. Figure 4B The astigmatism curve of the optical imaging lens of Example 2 is shown, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 4A and Figure 4B It can be seen that the camera lens provided in Example 2 can achieve good imaging quality.

[0130] Example 3

[0131] The following reference Figures 5 to 6B The imaging lens according to Embodiment 3 of the present application is described. Figure 5 A schematic structural diagram of a camera lens according to embodiment 3 of the present application is shown.

[0132] like Figure 5 As shown, the camera lens includes, from the object side to the image side, a first lens E1, a second lens E2, a third lens E3, an aperture STO, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter E8 and an imaging surface S17.

[0133] The first lens E1 has negative optical power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative optical power, with its object-side surface S3 being concave and its image-side surface S4 being concave. The third lens E3 has positive 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 concave 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 convex. The sixth lens E6 has negative optical power, with its object-side surface S11 being concave and its image-side surface S12 being convex. The seventh lens E7 has positive 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 an object sequentially passes through surfaces S1 to S16 and is ultimately imaged on an imaging surface S17.

[0134] In this example, the total effective focal length f of the camera lens is 1.51 mm, and the maximum field of view FOV of the camera lens is 199.4°.

[0135] Table 5 shows the basic parameters of the camera lens of Example 3, where the units of curvature radius, thickness / distance, and focal length are all in millimeters (mm). Tables 6-1 and 6-2 show the high-order coefficients of the various aspherical mirror surfaces that can be used in Example 3, where the surface shapes of the various aspherical surfaces can be defined by formula (1) given in Example 1 above.

[0136]

[0137] Table 5

[0138]

[0139]

[0140] Table 6-1

[0141] Face number A18 A20 A22 A24 A26 A28 A30 S3 -2.5962E-03 1.7299E-05 7.9262E-05 -1.7648E-05 1.9564E-06 -1.1563E-07 2.9068E-09 S4 1.0856E+03 -8.3016E+02 4.4399E+02 -1.6186E+02 3.8133E+01 -5.1992E+00 3.0859E-01 S5 1.0347E+03 -8.4504E+02 4.8623E+02 -1.9274E+02 5.0103E+01 -7.6896E+00 5.2827E-01 S6 -1.3773E+04 1.7821E+04 -1.6470E+04 1.0605E+04 -4.5196E+03 1.1465E+03 -1.3117E+02 S7 5.3954E-01 -7.5919E-02 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S8 1.4316E-03 -1.4161E-04 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S9 4.0398E-02 -1.7188E-02 5.3607E-03 -1.1649E-03 1.6554E-04 -1.3764E-05 5.0654E-07 S10 1.3492E+00 -4.4175E-01 1.0387E-01 -1.7064E-02 1.8559E-03 -1.1984E-04 3.4726E-06 S11 2.1775E+00 -7.9381E-01 2.0850E-01 -3.8414E-02 4.7067E-03 -3.4416E-04 1.1355E-05 S12 -2.9061E-02 1.3288E-02 -4.1409E-03 8.6036E-04 -1.1429E-04 8.7950E-06 -2.9864E-07 S13 -2.5445E-03 5.0817E-04 -7.3102E-05 7.3741E-06 -4.9445E-07 1.9770E-08 -3.5628E-10 S14 -7.2244E-03 1.4531E-03 -2.0966E-04 2.1131E-05 -1.4112E-06 5.6074E-08 -1.0028E-09

[0142] Table 6-2

[0143] Figure 6A The axial chromatic aberration curve of the optical imaging lens of Example 3 is shown, which indicates the deviation of the focal point of light of different wavelengths passing through the lens. Figure 6B The astigmatism curve of the optical imaging lens of Example 3 is shown, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 6A and Figure 6B It can be seen that the camera lens provided in Example 3 can achieve good imaging quality.

[0144] Example 4

[0145] The following reference Figures 7 to 8B The imaging lens according to Embodiment 4 of the present application is described. Figure 7 A schematic structural diagram of a camera lens according to Example 4 of the present application is shown.

[0146] like Figure 7 As shown, the camera lens includes, from the object side to the image side, a first lens E1, a second lens E2, a third lens E3, an aperture STO, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter E8 and an imaging surface S17.

[0147] The first lens E1 has negative optical power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative optical power, with its object-side surface S3 being concave and its image-side surface S4 being concave. The third lens E3 has positive 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 concave 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 convex. The sixth lens E6 has negative optical power, with its object-side surface S11 being concave and its image-side surface S12 being convex. The seventh lens E7 has positive 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 an object sequentially passes through surfaces S1 to S16 and is ultimately imaged on an imaging surface S17.

[0148] In this example, the total effective focal length f of the camera lens is 1.53 mm, and the maximum field of view FOV of the camera lens is 187.8°.

[0149] Table 7 shows the basic parameters of the camera lens of Example 4, where the units of curvature radius, thickness / distance, and focal length are all in millimeters (mm). Tables 8-1 and 8-2 show the high-order coefficients of the various aspherical mirror surfaces that can be used in Example 4, where the surface shape of each aspherical surface can be defined by formula (1) given in Example 1 above.

[0150]

[0151] Table 7

[0152] Face number A4 A6 A8 A10 A12 A14 A16 S3 1.6814E-01 -1.4063E-01 9.2491E-02 -2.2075E-02 -2.9459E-02 3.9458E-02 -2.5019E-02 S4 -2.6527E-01 3.3703E+00 -2.6506E+01 1.3025E+02 -4.1887E+02 9.2047E+02 -1.4210E+03 S5 -3.0361E-01 1.9673E+00 -1.4377E+01 6.9618E+01 -2.2182E+02 4.8297E+02 -7.3750E+02 S6 8.0482E-02 -7.5584E-01 8.4213E+00 -5.1383E+01 2.0205E+02 -5.2093E+02 8.4607E+02 S7 -1.8775E-02 9.6337E-02 -4.7413E-01 1.3871E+00 -2.4215E+00 2.5744E+00 -1.6139E+00 S8 -6.1375E-02 9.5363E-02 -1.4143E-01 1.4798E-01 -1.0645E-01 4.9566E-02 -1.4218E-02 S9 -7.0706E-02 1.1267E-01 -1.5312E-01 1.7069E-01 -1.5450E-01 1.1782E-01 -7.7285E-02 S10 -1.1057E-01 3.7765E-01 -1.6107E+00 3.4551E+00 -4.5059E+00 3.9714E+00 -2.4824E+00 S11 1.8004E-01 8.3636E-02 -1.3923E+00 3.7303E+00 -5.6264E+00 5.6434E+00 -3.9956E+00 S12 1.1493E-01 -1.5690E-01 2.5983E-01 -2.8111E-01 2.1571E-01 -1.3729E-01 7.9804E-02 S13 -1.0983E-01 2.2149E-02 4.7657E-02 -7.4600E-02 5.9764E-02 -3.1740E-02 1.1954E-02 S14 -1.1617E-02 -3.5615E-02 6.3819E-02 -6.2053E-02 4.0822E-02 -1.9211E-02 6.6580E-03

[0153] Table 8-1

[0154]

[0155]

[0156] Table 8-2

[0157] Figure 8A The axial chromatic aberration curve of the optical imaging lens of Example 4 is shown, which indicates the deviation of the focal point of light of different wavelengths passing through the lens. Figure 8B The astigmatism curve of the optical imaging lens of Example 4 is shown, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 8A and Figure 8B It can be seen that the camera lens provided in Example 4 can achieve good imaging quality.

[0158] Example 5

[0159] The following reference Figures 9 to 10B The imaging lens according to Embodiment 5 of the present application is described. Figure 9 A schematic structural diagram of a camera lens according to embodiment 5 of the present application is shown.

[0160] like Figure 9 As shown, the camera lens includes, from the object side to the image side, a first lens E1, a second lens E2, a third lens E3, an aperture STO, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter E8 and an imaging surface S17.

[0161] The first lens E1 has negative optical power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative optical power, with its object-side surface S3 being concave and its image-side surface S4 being concave. The third lens E3 has positive 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 concave 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 convex. The sixth lens E6 has negative optical power, with its object-side surface S11 being concave and its image-side surface S12 being convex. The seventh lens E7 has positive 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 an object sequentially passes through surfaces S1 to S16 and is ultimately imaged on an imaging surface S17.

[0162] In this example, the total effective focal length f of the camera lens is 1.47 mm, and the maximum field of view FOV of the camera lens is 213.7°.

[0163] Table 9 shows the basic parameters of the camera lens of Example 5, where the units of curvature radius, thickness / distance, and focal length are all in millimeters (mm). Tables 10-1 and 10-2 show the high-order coefficients of the various aspherical mirror surfaces that can be used in Example 5, where the surface shape of each aspherical surface can be defined by formula (1) given in Example 1 above.

[0164]

[0165]

[0166] Table 9

[0167] Face number A4 A6 A8 A10 A12 A14 A16 S3 2.2456E-01 -2.4972E-01 2.3728E-01 -1.6563E-01 7.9720E-02 -2.3854E-02 2.7077E-03 S4 -7.8204E-01 7.7736E+00 -4.8764E+01 2.0519E+02 -5.9525E+02 1.2184E+03 -1.7861E+03 S5 -6.8202E-01 5.4866E+00 -3.3567E+01 1.4306E+02 -4.2377E+02 8.8811E+02 -1.3345E+03 S6 1.8456E-01 -2.9863E+00 3.9875E+01 -3.1698E+02 1.6691E+03 -6.0983E+03 1.5875E+04 S7 -1.2739E-02 6.3805E-02 -2.5664E-01 6.3896E-01 -9.8336E-01 9.5885E-01 -5.6711E-01 S8 -6.2843E-02 1.0062E-01 -1.7777E-01 2.4206E-01 -2.3363E-01 1.4912E-01 -5.9472E-02 S9 -6.9220E-02 9.0132E-02 -9.8556E-02 7.2395E-02 -2.0341E-02 -1.7473E-02 2.2386E-02 S10 -2.3555E-02 -3.6746E-02 -2.2784E-01 6.3807E-01 -7.6628E-01 5.5632E-01 -2.6690E-01 S11 1.5577E-01 -1.5718E-01 -1.8711E-01 8.9596E-01 -1.5307E+00 1.6606E+00 -1.2729E+00 S12 8.3409E-02 -1.6955E-01 4.8239E-01 -8.5124E-01 1.0189E+00 -8.7014E-01 5.4088E-01 S13 -7.8567E-02 2.3241E-02 2.8387E-02 -5.1224E-02 4.1870E-02 -2.1922E-02 8.0042E-03 S14 -3.1535E-02 -1.8445E-02 5.3124E-02 -5.8266E-02 4.1409E-02 -2.0789E-02 7.6140E-03

[0168] Table 10-1

[0169] Face number A18 A20 A22 A24 A26 A28 A30 S3 1.0547E-03 -6.1180E-04 1.5506E-04 -2.3667E-05 2.2331E-06 -1.2055E-07 2.8578E-09 S4 1.8883E+03 -1.4374E+03 7.7827E+02 -2.9165E+02 7.1736E+01 -1.0395E+01 6.7086E-01 S5 1.4473E+03 -1.1312E+03 6.2970E+02 -2.4313E+02 6.1792E+01 -9.2879E+00 6.2504E-01 S6 -2.9826E+04 4.0519E+04 -3.9398E+04 2.6714E+04 -1.1991E+04 3.2005E+03 -3.8450E+02 S7 1.8343E-01 -2.4744E-02 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S8 1.3380E-02 -1.2926E-03 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S9 -1.1279E-02 2.7945E-03 -1.3615E-04 -1.1611E-04 3.3789E-05 -3.9786E-06 1.8141E-07 S10 8.5120E-02 -1.6564E-02 1.1769E-03 2.8758E-04 -9.0029E-05 1.0186E-05 -4.4288E-07 S11 7.0882E-01 -2.8696E-01 8.3313E-02 -1.6855E-02 2.2516E-03 -1.7830E-04 6.3326E-06 S12 -2.4635E-01 8.2000E-02 -1.9690E-02 3.3173E-03 -3.7174E-04 2.4868E-05 -7.5111E-07 S13 -2.1043E-03 4.0191E-04 -5.5356E-05 5.3601E-06 -3.4618E-07 1.3381E-08 -2.3393E-10 S14 -2.0577E-03 4.0960E-04 -5.9218E-05 6.0354E-06 -4.1020E-07 1.6651E-08 -3.0477E-10

[0170] Table 10-2

[0171] Figure 10A The axial chromatic aberration curve of the optical imaging lens of Example 5 is shown, which indicates the deviation of the focal point of light of different wavelengths passing through the lens. Figure 10B The astigmatism curve of the optical imaging lens of Example 5 is shown, which represents the meridional field curvature and the sagittal field curvature. Figure 10A and Figure 10B It can be seen that the camera lens provided in Example 5 can achieve good imaging quality.

[0172] Example 6

[0173] The following reference Figures 11 to 12B The imaging lens according to Embodiment 6 of the present application is described. Figure 11 A structural schematic diagram of a camera lens according to Example 6 of the present application is shown.

[0174] like Figure 11 As shown, the camera lens includes, from the object side to the image side, a first lens E1, a second lens E2, a third lens E3, an aperture STO, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter E8 and an imaging surface S17.

[0175] The first lens E1 has negative optical power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative optical power, with its object-side surface S3 being concave and its image-side surface S4 being concave. The third lens E3 has positive 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 concave 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 convex. The sixth lens E6 has negative optical power, with its object-side surface S11 being concave and its image-side surface S12 being convex. The seventh lens E7 has positive 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 an object sequentially passes through surfaces S1 to S16 and is ultimately imaged on an imaging surface S17.

[0176] In this example, the total effective focal length f of the camera lens is 1.41 mm, and the maximum field of view FOV of the camera lens is 219.6°.

[0177] Table 11 shows the basic parameters of the camera lens of Example 6, where the units of curvature radius, thickness / distance, and focal length are all in millimeters (mm). Tables 12-1 and 12-2 show the high-order coefficients of the various aspherical mirror surfaces that can be used in Example 6, where the surface shape of each aspherical surface can be defined by formula (1) given in Example 1 above.

[0178]

[0179]

[0180] Table 11

[0181] Face number A4 A6 A8 A10 A12 A14 A16 S3 2.6580E-01 -3.5779E-01 4.1766E-01 -3.6443E-01 2.3172E-01 -1.0757E-01 3.6612E-02 S4 1.1248E-01 3.1163E-01 -5.8746E-01 -1.2727E+01 8.8462E+01 -2.9245E+02 6.0276E+02 S5 -9.2193E-02 5.4808E-01 -3.1107E+00 1.0272E+01 -1.9269E+01 1.6228E+01 1.3111E+01 S6 1.9707E-01 -3.1900E+00 4.1918E+01 -3.3548E+02 1.7874E+03 -6.6110E+03 1.7412E+04 S7 -1.2865E-02 7.7860E-02 -3.2809E-01 8.2606E-01 -1.2494E+00 1.1635E+00 -6.4270E-01 S8 -1.0238E-01 2.0304E-01 -3.2663E-01 3.6769E-01 -2.9118E-01 1.5745E-01 -5.5450E-02 S9 -1.2268E-01 2.8389E-01 -5.3638E-01 7.8218E-01 -8.5411E-01 6.9121E-01 -4.1424E-01 S10 -2.1402E-02 -2.5270E-01 5.9002E-01 -9.2697E-01 1.1283E+00 -1.0244E+00 6.7696E-01 S11 2.7494E-01 -6.4426E-01 1.2463E+00 -1.7233E+00 1.6531E+00 -1.0499E+00 3.8623E-01 S12 9.0993E-02 -2.4569E-01 7.4956E-01 -1.3187E+00 1.5303E+00 -1.2553E+00 7.5009E-01 S13 -1.7516E-01 1.4828E-01 -8.5852E-02 1.7541E-02 1.6725E-02 -1.8094E-02 9.1429E-03 S14 1.5647E-02 -1.1363E-01 2.2661E-01 -2.7138E-01 2.1638E-01 -1.1995E-01 4.7413E-02

[0182] Table 12-1

[0183] Face number A18 A20 A22 A24 A26 A28 A30 S3 -9.1175E-03 1.6420E-03 -2.0844E-04 1.7779E-05 -9.2943E-07 2.4235E-08 -1.4740E-10 S4 -8.3912E+02 8.1174E+02 -5.4707E+02 2.5203E+02 -7.5663E+01 1.3337E+01 -1.0468E+00 S5 -5.7154E+01 8.0376E+01 -6.5779E+01 3.3878E+01 -1.0823E+01 1.9614E+00 -1.5411E-01 S6 -3.3079E+04 4.5411E+04 -4.4594E+04 3.0521E+04 -1.3820E+04 3.7194E+03 -4.5029E+02 S7 1.9098E-01 -2.3347E-02 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S8 1.1479E-02 -1.0572E-03 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S9 1.8392E-01 -6.0283E-02 1.4413E-02 -2.4482E-03 2.8032E-04 -1.9423E-05 6.1549E-07 S10 -3.2430E-01 1.1251E-01 -2.8041E-02 4.9061E-03 -5.7328E-04 4.0224E-05 -1.2819E-06 S11 -2.8514E-02 -4.9734E-02 2.8897E-02 -8.2340E-03 1.3627E-03 -1.2524E-04 4.9675E-06 S12 -3.3017E-01 1.0694E-01 -2.5152E-02 4.1751E-03 -4.6323E-04 3.0801E-05 -9.2744E-07 S13 -2.9637E-03 6.6183E-04 -1.0339E-04 1.1131E-05 -7.8828E-07 3.3062E-08 -6.2223E-10 S14 -1.3535E-02 2.7949E-03 -4.1322E-04 4.2607E-05 -2.9075E-06 1.1791E-07 -2.1503E-09

[0184] Table 12-2

[0185] Figure 12AThe axial chromatic aberration curve of the optical imaging lens of Example 6 is shown, which indicates the deviation of the focal point of light of different wavelengths passing through the lens. Figure 12B The astigmatism curve of the optical imaging lens of Example 6 is shown, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 12A and Figure 12B It can be seen that the camera lens provided in Example 6 can achieve good imaging quality.

[0186] In summary, Examples 1 to 6 respectively satisfy the relationships shown in Table 13.

[0187] Conditional formula / Example 1 2 3 4 5 6 Fno / tan(FOV / 4) 1.08 1.27 1.22 1.35 1.07 0.96 TTL / tan(FOV / 3)(mm) 3.78 5.16 4.87 5.63 3.91 3.39 SAG21+Y21(mm) 0.14 0.11 0.12 0.24 0.06 0.12 SAG61 / ET6 -0.65 -0.70 -0.65 -0.65 -0.54 -0.63 SAG71 / CT7 0.90 0.86 0.81 0.79 0.88 0.76 (SAG12-SAG11) / ET1 0.32 0.18 0.01 0.31 0.14 0.22 (SAG22-T23) / (SAG31-T23) 1.03 1.04 1.06 1.04 1.03 1.07 ET2 / CT2 2.80 2.65 2.73 1.81 3.04 2.58 CT7 / ET7 2.98 2.99 2.53 2.50 2.40 2.54 (DT11-DTs) / (DT72-DTs) 1.85 1.94 1.75 2.02 2.12 1.96 (DT11-DT21) / (DT12-DT22) 1.61 1.73 1.44 1.75 1.92 1.89 f / CT4+f / CT5+f / CT7 2.93 2.92 3.08 3.20 3.06 2.82 (CT5-CT7) / (CT5-CT4) 1.17 1.11 0.98 1.03 1.21 0.93 f23 / f -3.48 -2.84 -2.68 -2.95 -2.96 -3.32 f / f56 0.12 0.15 0.08 0.10 0.16 0.09 f / R3 -0.50 -0.53 -0.56 -0.40 -0.54 -0.49 f / R5 1.22 1.14 1.02 1.10 1.15 0.90 f / R12 -0.52 -0.57 -0.45 -0.51 -0.46 -0.43

[0188] Table 13

[0189] The present application also provides an imaging device, wherein the electronic photosensitive element thereof may be a charge coupled device (CCD) or a complementary metal oxide semiconductor (CMOS). The imaging device may be a standalone 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 camera lens described above.

[0190] The above description is merely a preferred embodiment of the present application and an illustration 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 the technical solutions formed by the specific combination of the above-mentioned technical features, but also encompasses other technical solutions formed by any combination of the above-mentioned technical features or their equivalents without departing from the inventive concept. For example, a technical solution formed by replacing the above-mentioned features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A camera lens, characterized in that: Along the optical axis from the object side to the image side, they include: a first lens having negative optical power, wherein the object-side surface is convex and the image-side surface is concave; a second lens having negative optical power, wherein the object-side surface and the image-side surface are concave; The third lens has positive optical power, its object-side surface is convex and its image-side surface is concave; a fourth lens element having positive optical power, whose object-side surface is concave and whose image-side surface is convex; a fifth lens element having positive optical power, with a convex object-side surface and a convex image-side surface; a sixth lens element having negative optical power, whose object-side surface is concave and whose image-side surface is convex; and The seventh lens element has positive refractive power, its object-side surface is convex and its image-side surface is concave; The number of lenses having optical power in the camera lens is seven; The total effective focal length f of the camera lens, the effective focal length f2 of the second lens, and the effective focal length fi of the i-th lens satisfy the following conditions: |f / f2|>|f / fi|, where i is selected from 1, 3, 4, 5, 6, or 7; The total effective focal length f of the camera lens, the center thickness CT4 of the fourth lens on the optical axis, the center thickness CT5 of the fifth lens on the optical axis, and the center thickness CT7 of the seventh lens on the optical axis satisfy: 2.82≤f / CT4+f / CT5+f / CT7≤3.

20.

2. The imaging lens according to claim 1, wherein: The effective focal length f1 of the first lens and the effective focal length fj of the j-th lens satisfy: |f / f1|<|f / fj|, where j is selected from 2, 3, 4, 5, 6 or 7.

3. The camera lens according to claim 1, wherein: The chromatic aberration coefficient V of the m-th lens and the refractive index N of the m-th lens satisfy: 20<V / N<35, wherein the m-th lens is one lens among the first lens to the seventh lens.

4. The imaging lens according to claim 1, wherein: The distance SAG21 from the intersection of the object side surface of the second lens and the optical axis to the vertex of the maximum effective radius of the object side surface of the second lens on the optical axis and the distance Y21 from the critical point of the object side surface of the second lens at the off-axis position to the intersection of the object side surface of the second lens and the optical axis on the optical axis satisfy: 0.06mm≤(SAG21+Y21)<0.25mm.

5. The imaging lens according to claim 1, wherein: The distance SAG61 from the intersection of the object side surface of the sixth lens and the optical axis to the maximum effective radius vertex of the object side surface of the sixth lens on the optical axis and the edge thickness ET6 of the sixth lens at the maximum effective radius satisfy: -0.70≤SAG61 / ET6<-0.

5.

6. The camera lens according to claim 1, wherein: A distance SAG71 from the intersection of the object side surface of the seventh lens and the optical axis to the maximum effective radius vertex of the object side surface of the seventh lens on the optical axis and a center thickness CT7 of the seventh lens on the optical axis satisfy: 0.76≤SAG71 / CT7≤0.

90.

7. The imaging lens according to claim 1, wherein: The distance SAG11 from the intersection of the object side surface of the first lens and the optical axis to the vertex of the maximum effective radius of the object side surface of the first lens on the optical axis, the distance SAG12 from the intersection of the image side surface of the first lens and the optical axis to the vertex of the maximum effective radius of the image side surface of the first lens on the optical axis, and the edge thickness ET1 of the first lens at the maximum effective radius satisfy: 0<(SAG12-SAG11) / ET1≤0.

32.

8. The imaging lens according to claim 1, wherein: The distance SAG22 from the intersection of the image side surface of the second lens and the optical axis to the vertex of the maximum effective radius of the image side surface of the second lens on the optical axis, the distance SAG31 from the intersection of the object side surface of the third lens and the optical axis to the vertex of the maximum effective radius of the object side surface of the third lens on the optical axis, and the air gap T23 between the second lens and the third lens on the optical axis satisfy: 1.0<(SAG22-T23) / (SAG31-T23)<1.

1.

9. The imaging lens according to claim 1, wherein: An edge thickness ET2 of the second lens at the maximum effective radius and a center thickness CT2 of the second lens on the optical axis satisfy the following: 1.81≤ET2 / CT2≤3.

04.

10. The imaging lens according to claim 1, wherein: An edge thickness ET7 of the seventh lens at the maximum effective radius and a center thickness CT7 of the seventh lens on the optical axis satisfy the following: 2.40≤CT7 / ET7<3.

0.

11. The imaging lens according to claim 1, wherein: The camera lens further includes an aperture provided between the third lens and the fourth lens. The effective radius DTs of the aperture, the effective radius DT11 of the object-side surface of the first lens, and the effective radius DT72 of the image-side surface of the seventh lens satisfy the following: 1.75≤(DT11-DTs) / (DT72-DTs)≤2.

12.

12. The imaging lens according to claim 1, wherein: An effective radius DT11 of the object side surface of the first lens, an effective radius DT12 of the image side surface of the first lens, an effective radius DT21 of the object side surface of the second lens, and an effective radius DT22 of the image side surface of the second lens satisfy: 1.4<(DT11-DT21) / (DT12-DT22)≤1.

92.

13. The imaging lens according to claim 1, wherein: A center thickness CT4 of the fourth lens on the optical axis, a center thickness CT5 of the fifth lens on the optical axis, and a center thickness CT7 of the seventh lens on the optical axis satisfy the following: 0.9<(CT5-CT7) / (CT5-CT4)≤1.

21.

14. The imaging lens according to claim 1, wherein: A combined focal length f23 of the second lens and the third lens satisfies: -3.5<f23 / f≤-2.

68.

15. The imaging lens according to claim 1, wherein: A combined focal length f56 of the fifth lens and the sixth lens satisfies: 0.08≤f / f56<0.

2.

16. The imaging lens according to claim 1, wherein: A curvature radius R3 of the object-side surface of the second lens satisfies: -0.56≤f / R3≤-0.

40.

17. The imaging lens according to claim 1, wherein: The curvature radius R5 of the object-side surface of the third lens satisfies: 0.90≤f / R5≤1.

22.

18. The imaging lens according to claim 1, wherein: A curvature radius R12 of the image-side surface of the sixth lens satisfies: -0.57≤f / R12≤-0.

43.

19. The camera lens according to any one of claims 1 to 18, wherein: At least one of the first to seventh lenses is a glass lens.

20. The camera lens according to any one of claims 1 to 18, wherein: The maximum field of view FOV of the camera lens and the F number Fno of the camera lens satisfy the following conditions: 0.96≤Fno / tan(FOV / 4)≤1.

35.

21. The camera lens according to any one of claims 1 to 18, wherein: The distance TTL from the object side surface of the first lens to the imaging surface of the camera lens on the optical axis and the maximum field of view FOV of the camera lens satisfy the following conditions: 3.39 mm ≤ TTL / tan(FOV / 3) ≤ 5.63 mm.

Images