wide-angle lens

Abstract

A wide-angle lens includes, in order from the object side to the image side along the optical axis, a first lens having negative refractive power, an object-side surface of which is convex, a second lens having refractive power, a third lens having positive refractive power, an image-side surface of which is convex, a fourth lens having positive refractive power, a fifth lens having negative refractive power, a sixth lens having positive refractive power, an object-side surface of which is convex, and a seventh lens having negative refractive power.

Description

Technical Field

[0001] This application relates to the field of optical devices, specifically to a seven-element wide-angle lens. Background Technology

[0002] Because of their wide shooting range and ability to capture more content, wide-angle lenses are suitable for applications with specific requirements for imaging range, such as action cameras, drones, automotive imaging, and video conferencing equipment. As the demand for wide-angle lenses in these fields continues to increase, the requirements for their image quality are also becoming increasingly stringent.

[0003] Wide-angle lenses have a wide range of applications in these fields, operating in complex environments such as severe vibration, high pressure, or extreme temperatures. Therefore, they require higher performance. Wide-angle lenses not only need excellent thermal stability to cope with varying operating conditions, but also need to be small in size and weight, and be compatible with high-resolution sensors to meet the needs of different usage scenarios. However, traditional wide-angle lenses perform poorly in these complex environments, making it difficult to meet the requirements for use in such conditions. Summary of the Invention

[0004] This application provides a wide-angle lens that can at least solve or partially solve at least one problem or other problems existing in the prior art.

[0005] One aspect of this application provides a wide-angle lens comprising, along the optical axis from the object side to the image side, the following in sequence: a first lens having negative optical power and a convex object side; a second lens having optical power; a third lens having positive optical power and a convex image side; a fourth lens having positive optical power; a fifth lens having negative optical power; a sixth lens having positive optical power and a convex object side; and a seventh lens having negative optical power.

[0006] According to an exemplary embodiment of this application, the image-side surface of the first lens is concave.

[0007] According to an exemplary embodiment of this application, the object-side surface of the second lens is convex, and the image-side surface is concave.

[0008] According to an exemplary embodiment of this application, the object-side surface of the fourth lens is convex, and the image-side surface is also convex.

[0009] According to an exemplary embodiment of this application, the object-side surface of the fifth lens is concave, and the image-side surface is convex.

[0010] According to an exemplary embodiment of this application, the object-side surface of the seventh lens is concave, and the image-side surface is also concave.

[0011] According to an exemplary embodiment of this application, the maximum optical aperture D of the wide-angle lens and the effective focal length F1 of the first lens satisfy: -1.4≤D / F1≤-0.5.

[0012] According to an exemplary embodiment of this application, the effective focal length F1 of the first lens and the total effective focal length F of the wide-angle lens satisfy: -3.0≤F1 / F≤-1.5.

[0013] According to an exemplary embodiment of this application, the radius of curvature R21 of the object side of the second lens and the radius of curvature R22 of the image side of the second lens satisfy: -0.2≤(R21-R22) / (R21+R22)≤1.0.

[0014] According to an exemplary embodiment of this application, the effective focal length F3 of the third lens and the total effective focal length F of the wide-angle lens satisfy: 1.6≤F3 / F≤3.2.

[0015] According to an exemplary embodiment of this application, the effective focal length F4 of the fourth lens and the total effective focal length F of the wide-angle lens satisfy: 1.3≤F4 / F≤2.5.

[0016] According to an exemplary embodiment of this application, the effective focal length F5 of the fifth lens and the total effective focal length F of the wide-angle lens satisfy: -7.6≤F5 / F≤-4.5.

[0017] According to an exemplary embodiment of this application, the effective focal length F6 of the sixth lens and the total effective focal length F of the wide-angle lens satisfy: 2.5≤F6 / F≤8.5.

[0018] According to an exemplary embodiment of this application, the effective focal length F7 of the seventh lens and the total effective focal length F of the wide-angle lens satisfy: -1.9≤F7 / F≤-1.0.

[0019] According to an exemplary embodiment of this application, the combined focal length F34 of the third lens and the fourth lens satisfies the following condition with respect to the total effective focal length F of the wide-angle lens: 0.7 ≤ F34 / F ≤ 1.4.

[0020] According to an exemplary embodiment of this application, the effective focal length F1 of the first lens and the effective focal length F7 of the seventh lens satisfy: 0.2≤F7 / F1≤1.1.

[0021] According to an exemplary embodiment of this application, the combined focal length F12 of the first lens and the second lens and the combined focal length F67 of the sixth lens and the seventh lens satisfy: 0.4≤F12 / F67≤1.3.

[0022] According to an exemplary embodiment of this application, the sum of the center thicknesses of each of the first to seventh lenses on the optical axis, ∑CT, satisfies the following condition with respect to the total optical length TTL of the wide-angle lens: 0.3≤∑CT / TTL≤0.9.

[0023] According to an exemplary embodiment of this application, the edge thickness ET1 of the first lens and the center thickness CT1 of the first lens on the optical axis satisfy: 1.2≤ET1 / CT1≤3.2.

[0024] According to an exemplary embodiment of this application, the radius of curvature R11 of the object side of the first lens and the center thickness CT1 of the first lens on the optical axis satisfy: 9.0≤R11 / CT1≤30.1.

[0025] According to an exemplary embodiment of this application, the air gap T12 between the first lens and the second lens on the optical axis and the total optical length TTL of the wide-angle lens satisfy: 0≤T12 / TTL≤0.3.

[0026] According to an exemplary embodiment of this application, the edge thickness ET4 of the fourth lens and the center thickness CT4 of the fourth lens on the optical axis satisfy: 0.1≤ET4 / CT4≤0.9.

[0027] According to an exemplary embodiment of this application, the air gap T34 between the third lens and the fourth lens on the optical axis and the combined focal length F34 of the third lens and the fourth lens satisfy: 0≤T34 / F34≤0.2.

[0028] According to an exemplary embodiment of this application, the edge thickness ET6 of the sixth lens and the center thickness CT6 of the sixth lens on the optical axis satisfy: 0.1≤ET6 / CT6≤0.9.

[0029] According to an exemplary embodiment of this application, the center thickness CT6 of the sixth lens on the optical axis, the center thickness CT7 of the seventh lens on the optical axis, and the air gap T67 of the sixth and seventh lenses on the optical axis satisfy: 0.7≤(CT6+CT7) / T67≤3.0.

[0030] According to an exemplary embodiment of this application, the total optical length TTL of the wide-angle lens and the maximum image height IH corresponding to the maximum field of view of the wide-angle lens satisfy: 2.5≤TTL / IH≤4.1.

[0031] According to an exemplary embodiment of this application, the back focal length BFL of the wide-angle lens and the total effective focal length F of the wide-angle lens satisfy: 0.1≤BFL / F≤0.3.

[0032] According to an exemplary embodiment of this application, the maximum image height IH corresponding to the maximum field of view of the wide-angle lens and the entrance pupil diameter ENPD of the wide-angle lens satisfy the following condition: 3.0≤IH / ENPD≤3.8.

[0033] This application employs seven lenses. By rationally allocating the optical power and surface shape of each lens and matching them with reasonable parameter settings, the wide-angle lens can be made suitable for high and low temperature environments, and achieve at least one of the following beneficial effects: high resolution (48 million pixels), large field of view, large image plane (maximum image height IH ≥ 12mm corresponding to the maximum field of view), and miniaturization. Attached Figure Description

[0034] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0035] Figure 1 A schematic diagram of the structure of a wide-angle lens according to Embodiment 1 of this application is shown;

[0036] Figure 2 A schematic diagram of the structure of a wide-angle lens according to Embodiment 2 of this application is shown;

[0037] Figure 3 A schematic diagram of the structure of a wide-angle lens according to Embodiment 3 of this application is shown;

[0038] Figure 4 A schematic diagram of the structure of a wide-angle lens according to Embodiment 4 of this application is shown;

[0039] Figure 5 A schematic diagram of the structure of a wide-angle lens according to Embodiment 5 of this application is shown; and

[0040] Figure 6 A schematic diagram of the structure of a wide-angle lens according to Embodiment 6 of this application is shown. Detailed Implementation

[0041] To better understand this application, various aspects of this application will be described in detail with reference to the accompanying drawings. It should be understood that these detailed descriptions are merely descriptions of exemplary embodiments of this application and are not intended to limit the scope of this application in any way.

[0042] In the accompanying drawings, the thickness, size, and shape of the lenses have been slightly exaggerated for ease of illustration. Specifically, the shapes of the spherical or aspherical surfaces shown in the drawings are illustrated by way of example. That is, the shapes of the spherical or aspherical surfaces are not limited to those shown in the drawings. The drawings are for illustrative purposes only and are not drawn strictly to scale.

[0043] In this article, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the location of the convexity is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the location of the concaveness is not defined, it means that the lens surface is concave at least in the paraxial region. The surface of each lens closest to the subject is called the object-side surface of the lens, and the surface of each lens closest to the imaging plane is called the image-side surface of the lens.

[0044] It should also be understood that the terms "comprising," "including," "having," "containing," and / or "comprises" as 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. It should be noted that in this specification, the expressions "first," "second," "third," etc., are used only to distinguish one feature from another and do not imply any limitation on the features.

[0045] Unless otherwise specified, all terms used herein shall have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. Terms shall be interpreted as having the meaning consistent with their meaning in the context of the relevant art and shall not be interpreted in an idealized or overly formal sense unless expressly stated herein.

[0046] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0047] A wide-angle lens according to an exemplary embodiment of this application may include a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens, which are arranged sequentially along the optical axis from the object side to the image side. Air gaps may exist between adjacent lenses in the first to seventh lenses.

[0048] In an exemplary embodiment, the first lens may have negative optical power. The object-side surface of the first lens may be convex, and the image-side surface may be concave. By configuring the first lens with the above-described structure, the angle of incidence of light on the object-side surface of the first lens is small, and the light can smoothly reach the rear system after passing through the first lens, which is beneficial for achieving a large field of view of a wide-angle lens.

[0049] In an exemplary embodiment, the second lens may have optical power. The object-side surface of the second lens may be convex, and the image-side surface may be concave. By configuring the second lens with the above-described structure, it is beneficial to reduce the large-angle light rays introduced by the first lens and balance the aberrations generated by the first lens, thereby reducing the edge aberrations of the wide-angle lens and minimizing the risk of ghosting. As an example, the radius of curvature of the object-side surface of the second lens is similar to the radius of curvature of the image-side surface of the second lens, which facilitates a smooth transition of light on the second lens and reduces the sensitivity of the second lens.

[0050] In an exemplary embodiment, the third lens may have positive optical power. The object-side surface of the third lens may be concave, and the image-side surface may be convex. By setting the third lens to the above-described structural form, the light path between the second and third lenses can be made smooth, ensuring that the light emitted from the second lens is well received by the third lens, reducing light loss in each field of view, and improving the relative illumination of each field of view. Alternatively, the object-side surface of the third lens may be convex, and the image-side surface may be convex. By setting the third lens to the above-described structural form, the shape difference between the image-side surface of the second lens and the object-side surface of the third lens can be significant, ensuring that the third lens effectively converges the forward light and smoothly transitions it to the rear, improving the illumination of the wide-angle lens.

[0051] In an exemplary embodiment, the fourth lens may have positive optical power. The object-side surface of the fourth lens may be convex, and the image-side surface may also be convex. By setting the fourth lens as a positive lens, it is beneficial to converge light rays while reducing the refraction angle of the light, resulting in a smooth transition of light path. Furthermore, the biconvex design of the fourth lens reduces the impact of its own coma on the wide-angle lens, improving the image quality of the wide-angle lens. As an example, the fourth lens may be a glass lens, which helps balance high and low temperatures. Combined with an aspherical design, this further enhances the image quality of the wide-angle lens, achieving high resolution.

[0052] In an exemplary embodiment, the fifth lens may have negative optical power. The object-side surface of the fifth lens may be concave, and the image-side surface may be convex. By configuring the fifth lens with the above-described structure, the field curvature produced by the fifth lens can be reduced, thereby improving the imaging quality of the wide-angle lens.

[0053] In an exemplary embodiment, the sixth lens may have positive optical power. The object-side surface of the sixth lens may be convex. By configuring the sixth lens with the above-described structure, it is advantageous to allow light passing through the fifth lens to transition smoothly through the sixth lens, thereby reducing the distortion of the wide-angle lens, increasing the imaging illumination of the wide-angle lens, and also helping to reduce the aberration sensitivity of the wide-angle lens and improve the imaging quality of the wide-angle lens.

[0054] In an exemplary embodiment, the seventh lens may have negative optical power. The object-side surface of the seventh lens may be concave, and the image-side surface may also be concave. By configuring the seventh lens with the above-described structure, it is beneficial to effectively transmit the light rays adjusted by each lens to the imaging plane, thereby ensuring that the wide-angle lens achieves the characteristic of a large image plane. As an example, the image-side surface of the seventh lens has at least one inflection point. By having at least one inflection point on the image-side surface of the seventh lens, it is beneficial to elevate the light rays, allowing the light rays to smoothly transition to the imaging plane, thereby achieving a large image plane for the wide-angle lens.

[0055] In an exemplary embodiment, the wide-angle lens may also include an aperture stop. The aperture stop may, for example, be positioned between the third lens and the fourth lens.

[0056] In an exemplary embodiment, the maximum optical aperture D of the wide-angle lens and the effective focal length F1 of the first lens can satisfy: -1.4 ≤ D / F1 ≤ -0.5. Properly configuring the ratio of the maximum optical aperture of the wide-angle lens to the effective focal length of the first lens is beneficial for allowing large-angle light rays to enter the system, effectively increasing the field of view of the wide-angle lens.

[0057] In an exemplary embodiment, the effective focal length F1 of the first lens and the total effective focal length F of the wide-angle lens can satisfy: -3.0 ≤ F1 / F ≤ -1.5. Properly configuring the effective focal length value of the first lens is beneficial for increasing the field of view of the wide-angle lens and realizing its wide-angle characteristics.

[0058] In an exemplary embodiment, the radius of curvature R21 of the object-side surface of the second lens and the radius of curvature R22 of the image-side surface of the second lens can satisfy: -0.2≤(R21-R22) / (R21+R22)≤1.0. By rationally configuring the radii of curvature of the object-side and image-side surfaces of the second lens, it is possible to effectively converge light rays from a large field of view and reduce the aberrations produced by the first lens, thereby achieving high resolution in a wide-angle lens.

[0059] In an exemplary embodiment, the effective focal length F3 of the third lens and the total effective focal length F of the wide-angle lens can satisfy: 1.6 ≤ F3 / F ≤ 3.2. A reasonable configuration of the effective focal length of the third lens is beneficial for improving the light-converging ability of the wide-angle lens, shortening the total optical length of the wide-angle lens, and effectively balancing the spherical aberration, coma, and field curvature generated by the third lens, thereby achieving high resolution in the wide-angle lens.

[0060] In an exemplary embodiment, the effective focal length F4 of the fourth lens and the total effective focal length F of the wide-angle lens can satisfy: 1.3 ≤ F4 / F ≤ 2.5. A reasonable configuration of the effective focal length value of the fourth lens facilitates smooth light transmission and effectively corrects aberrations in the wide-angle lens, thereby improving its image quality.

[0061] In an exemplary embodiment, the effective focal length F5 of the fifth lens and the total effective focal length F of the wide-angle lens can satisfy: -7.6 ≤ F5 / F ≤ -4.5. By rationally configuring the effective focal length value of the fifth lens, the imaging area of ​​the wide-angle lens can be increased, and various aberrations of the wide-angle lens can be effectively balanced, thereby improving the imaging quality of the wide-angle lens.

[0062] In an exemplary embodiment, the effective focal length F6 of the sixth lens and the total effective focal length F of the wide-angle lens can satisfy: 2.5 ≤ F6 / F ≤ 8.5. By rationally configuring the effective focal length value of the sixth lens, the imaging area of ​​the wide-angle lens can be increased, and various aberrations of the wide-angle lens can be effectively balanced, thereby improving the imaging quality of the wide-angle lens.

[0063] In an exemplary embodiment, the effective focal length F7 of the seventh lens and the total effective focal length F of the wide-angle lens can satisfy: -1.9 ≤ F7 / F ≤ -1.0. By rationally configuring the effective focal length value of the seventh lens, the imaging area of ​​the wide-angle lens can be increased, and the astigmatism and field curvature of the wide-angle lens can be effectively balanced, thereby improving the imaging quality of the wide-angle lens.

[0064] In an exemplary embodiment, the combined focal length F34 of the third and fourth lenses and the total effective focal length F of the wide-angle lens can satisfy: 0.7 ≤ F34 / F ≤ 1.4. Reasonably configuring the combined focal length of the third and fourth lenses helps control the light path between the second and fifth lenses, reducing aberrations caused by large-angle light rays entering through the second lens. Simultaneously, the combined lens formed by the third and fourth lenses is a positive lens, which can suppress light rays, reduce the rear aperture of the wide-angle lens, and achieve miniaturization of the wide-angle lens.

[0065] In an exemplary embodiment, the effective focal length F1 of the first lens and the effective focal length F7 of the seventh lens can satisfy: 0.2 ≤ F7 / F1 ≤ 1.1. Reasonably configuring the effective focal length values ​​of the first and seventh lenses can prevent the optical power of the wide-angle lens from concentrating on the first lens, which helps reduce the sensitivity of the first lens. Simultaneously, the seventh lens can be used to balance the spherical aberration and field curvature that are not completely eliminated by the six front lenses, thereby improving the imaging quality of the wide-angle lens.

[0066] In an exemplary embodiment, the combined focal length F12 of the first and second lenses and the combined focal length F67 of the sixth and seventh lenses can satisfy: 0.4 ≤ F12 / F67 ≤ 1.3. Reasonably configuring the optical power contribution of the front and rear lenses of a wide-angle lens is beneficial for correcting aberrations such as field curvature and distortion, thereby improving the image quality of the wide-angle lens. It also helps to shorten the overall optical length of the wide-angle lens, achieving miniaturization.

[0067] In an exemplary embodiment, the sum of the center thicknesses of the lenses in the first to seventh lenses along the optical axis, ∑CT, and the total optical length TTL of the wide-angle lens can satisfy the following condition: 0.3 ≤ ∑CT / TTL ≤ 0.9. Reasonably configuring the center thicknesses of each lens along the optical axis can effectively shorten the total optical length of the wide-angle lens, while also benefiting the structural design and manufacturing process of the wide-angle lens.

[0068] In an exemplary embodiment, the edge thickness ET1 of the first lens and the center thickness CT1 of the first lens on the optical axis can satisfy: 1.2≤ET1 / CT1≤3.2. Reasonably configuring the edge thickness and center thickness of the first lens not only ensures good manufacturability of the first lens but also allows light entering the system at a large field of view to diverge, reducing the angle of incidence, making the light path smoother, and reducing the difficulty of aberration correction.

[0069] In an exemplary embodiment, the radius of curvature R11 of the object-side surface of the first lens and the center thickness CT1 of the first lens on the optical axis can satisfy: 9.0 ≤ R11 / CT1 ≤ 30.1. Reasonably configuring the ratio of the radius of curvature of the object-side surface of the first lens to the center thickness of the first lens on the optical axis helps to constrain the shape of the first lens, preventing it from becoming excessively curved, and also facilitates the processing and shaping of the first lens.

[0070] In an exemplary embodiment, the air gap T12 between the first lens and the second lens on the optical axis and the total optical length TTL of the wide-angle lens can satisfy: 0 ≤ T12 / TTL ≤ 0.3. Properly configuring the air gap between the first lens and the second lens on the optical axis facilitates a smooth transition of light to the rear system and also allows sufficient space for structural configuration.

[0071] In an exemplary embodiment, the edge thickness ET4 and the center thickness CT4 of the fourth lens on the optical axis can satisfy: 0.1 ≤ ET4 / CT4 ≤ 0.9. Properly configuring the edge and center thicknesses of the fourth lens helps reduce its tolerance sensitivity.

[0072] In an exemplary embodiment, the air gap T34 between the third and fourth lenses on the optical axis and the combined focal length F34 of the third and fourth lenses can satisfy: 0 ≤ T34 / F34 ≤ 0.2. A reasonable configuration of the ratio of the air gap between the third and fourth lenses on the optical axis to the combined focal length of the third and fourth lenses facilitates a smooth transition of light from the image side of the third lens to the object side of the fourth lens, thereby reducing the deflection angle of peripheral light rays at the third and fourth lenses, improving the imaging quality of the peripheral field of view. Simultaneously, it helps to avoid light reflection between the third and fourth lenses, reducing the risk of ghosting and improving the imaging quality of the wide-angle lens.

[0073] In an exemplary embodiment, the edge thickness ET6 of the sixth lens and the center thickness CT6 of the sixth lens on the optical axis can satisfy: 0.1≤ET6 / CT6≤0.9. Reasonably configuring the edge thickness and center thickness of the sixth lens can reduce its size while ensuring its manufacturability, and also mitigate the deflection of light at the sixth lens.

[0074] In an exemplary embodiment, the center thickness CT6 of the sixth lens on the optical axis, the center thickness CT7 of the seventh lens on the optical axis, and the air gap T67 of the sixth and seventh lenses on the optical axis can satisfy: 0.7 ≤ (CT6 + CT7) / T67 ≤ 3.0. Properly configuring the ratio of the sum of the center thicknesses of the sixth and seventh lenses to the air gap between them is beneficial for controlling astigmatism in wide-angle lenses.

[0075] In an exemplary embodiment, the total optical length (TTL) of the wide-angle lens and the maximum image height (IH) corresponding to the maximum field of view of the wide-angle lens can satisfy the following condition: 2.5 ≤ TTL / IH ≤ 4.1. By rationally configuring the total optical length and the maximum image height corresponding to the maximum field of view of the wide-angle lens, it is possible to effectively shorten the total optical length of the wide-angle lens while ensuring good image quality, thereby achieving miniaturization of the wide-angle lens.

[0076] In an exemplary embodiment, the back focal length (BFL) of the wide-angle lens and the total effective focal length (F) of the wide-angle lens can satisfy the following condition: 0.1 ≤ BFL / F ≤ 0.3. Reasonably configuring the ratio of the back focal length to the total effective focal length of the wide-angle lens helps to achieve a balance between good image quality and an easy-to-assemble back focal length, thus reducing the assembly difficulty of the wide-angle lens while ensuring its image quality.

[0077] In an exemplary embodiment, the maximum image height IH corresponding to the maximum field of view of the wide-angle lens and the entrance pupil diameter ENPD of the wide-angle lens can satisfy: 3.0 ≤ IH / ENPD ≤ 3.8. By appropriately configuring the ratio of the maximum image height corresponding to the maximum field of view of the wide-angle lens to the entrance pupil diameter of the wide-angle lens, the width of the light beam entering the wide-angle lens can be increased, thereby improving the brightness of the image plane of the wide-angle lens while avoiding vignetting.

[0078] The wide-angle lens according to the above embodiments of this application can employ multiple lenses, such as the seven lenses mentioned above. By rationally allocating optical parameters such as the optical power, surface shape, center thickness of each lens, and on-axis spacing between each lens, the wide-angle lens can be made suitable for high and low temperature environments, and at least one of the following can be achieved: high resolution, large field of view, large image plane, and miniaturization. The wide-angle lens provided in this application can be, for example, a wide-angle lens with a maximum image height IH ≥ 12mm corresponding to the maximum field of view and 48 million pixels.

[0079] In embodiments of this application, at least one of the mirror surfaces of the first to seventh lenses is an aspherical mirror surface. An aspherical lens is characterized by a continuously changing curvature from its center to its periphery. Unlike a spherical lens, which has a constant curvature from its center to its periphery, an aspherical lens has superior curvature radius characteristics, offering advantages in improving distortion and astigmatism. By using an aspherical lens, aberrations occurring during imaging can be eliminated as much as possible, thereby improving image quality. Optionally, both the object-side and image-side surfaces of the second to seventh lenses are aspherical mirror surfaces.

[0080] However, those skilled in the art should understand that, without departing from the technical solutions claimed in this application, the number of lenses constituting the wide-angle lens can be changed to obtain the various results and advantages described in this specification.

[0081] The following describes in further detail, with reference to the accompanying drawings, specific embodiments of the wide-angle lens applicable to the above-described embodiments.

[0082] Example 1

[0083] The following is for reference Figure 1 Describes a wide-angle lens according to Embodiment 1 of this application. Figure 1 This is a schematic diagram of the structure of a wide-angle lens according to Embodiment 1 of this application.

[0084] like Figure 1 As shown, the wide-angle lens 100 includes, in sequence along the optical axis from the object side to the image side: a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7. The aperture stop STO can be positioned between the third lens L3 and the fourth lens L4.

[0085] The first lens L1 has negative optical power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens L2 has positive optical power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens L3 has positive optical power, with its object-side surface S5 being concave and its image-side surface S6 being convex. The fourth lens L4 has positive optical power, with its object-side surface S7 being convex and its image-side surface S8 being convex. The fifth lens L5 has negative optical power, with its object-side surface S9 being concave and its image-side surface S10 being convex. The sixth lens L6 has positive optical power, with its object-side surface S11 being convex and its image-side surface S12 being concave. The seventh lens L7 has negative optical power, with its object-side surface S13 being concave and its image-side surface S14 being concave. The filter CG 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 plane IMA. It should be noted that surfaces S1 to S16 are... Figure 1 Not shown in the image.

[0086] Table 1 shows the basic parameters of the wide-angle lens 100 of Embodiment 1, wherein the units for radius of curvature, thickness / distance and focal length are millimeters (mm).

[0087]

[0088]

[0089] Table 1

[0090] In Embodiment 1, the object-side surface and image-side surface of any one of the second lens L2 to the seventh lens L7 are aspherical surfaces, and the surface shape x of each aspherical lens can be defined using, but is not limited to, the following aspherical formula:

[0091]

[0092] Where x is the distance vector from the vertex of the aspherical surface at a height of h along the optical axis; c is the paraxial curvature of the aspherical surface, c = 1 / R (i.e., the paraxial curvature c is the reciprocal of the radius of curvature R in Table 1 above); k is the conic coefficient; Ai is the i-th order correction coefficient of the aspherical surface. Table 2 gives the conic coefficient k and higher-order coefficients A4, A6, A8, A14 that can be used for each aspherical mirror S3-S14 in Example 1. 10 A 12 A 14 and A 16 .

[0093] Face number k A4 A6 A8 A10 A12 A14 A16 S3 9.947 6.20E-04 -7.87E-06 2.31E-07 1.00E-08 -9.90E-10 3.31E-11 -3.76E-13 S4 46.186 3.39E-03 -3.11E-05 1.76E-05 -3.08E-07 -1.30E-07 2.77E-08 -1.13E-09 S5 -109.072 -1.59E-04 -9.76E-05 -1.10E-05 2.87E-06 -1.66E-07 -2.78E-08 3.72E-09 S6 0.081 5.25E-03 -2.73E-03 5.64E-04 6.47E-05 -4.67E-05 5.33E-06 4.73E-08 S7 22.403 -8.30E-04 -3.31E-03 -3.01E-05 2.01E-04 -2.45E-05 -1.80E-05 3.33E-06 S8 -5.340 -1.13E-02 3.63E-05 1.75E-06 -1.72E-05 -7.94E-07 1.10E-06 -1.48E-07 S9 3.007 -2.07E-03 2.29E-04 5.97E-05 6.78E-06 -5.13E-07 1.10E-07 -2.49E-08 S10 -36.429 -1.12E-03 2.43E-04 1.77E-05 -4.11E-08 5.28E-07 -4.69E-08 -1.41E-09 S11 1.865 -3.93E-03 8.58E-05 -1.16E-05 6.36E-07 -1.23E-07 -1.13E-08 1.22E-09 S12 -15.557 -3.93E-03 5.80E-05 1.15E-05 -1.13E-06 1.69E-09 1.34E-09 -2.22E-10 S13 10.332 -2.32E-02 1.67E-03 -2.63E-05 -5.42E-07 -2.02E-08 1.27E-08 -9.68E-10 S14 -33.410 -9.30E-03 4.47E-04 -9.75E-06 1.46E-08 2.63E-09 6.49E-11 -4.15E-12

[0094] Table 2

[0095] Example 2

[0096] The following is for reference Figure 2 Describes a wide-angle lens according to Embodiment 2 of this application. Figure 2 This is a schematic diagram of the structure of a wide-angle lens according to Embodiment 2 of this application.

[0097] like Figure 2 As shown, the wide-angle lens 200 includes, in sequence along the optical axis from the object side to the image side: a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7. The aperture stop STO can be positioned between the third lens L3 and the fourth lens L4.

[0098] The first lens L1 has negative optical power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens L2 has negative optical power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens L3 has positive optical power, with its object-side surface S5 being convex and its image-side surface S6 being convex. The fourth lens L4 has positive optical power, with its object-side surface S7 being convex and its image-side surface S8 being convex. The fifth lens L5 has negative optical power, with its object-side surface S9 being concave and its image-side surface S10 being convex. The sixth lens L6 has positive optical power, with its object-side surface S11 being convex and its image-side surface S12 being convex. The seventh lens L7 has negative optical power, with its object-side surface S13 being concave and its image-side surface S14 being concave. The filter CG has an object-side surface S15 and an image-side surface S16. Light from the object passes sequentially through surfaces S1 to S16 and is finally imaged onto the imaging plane IMA. It should be noted that surfaces S1 to S16 are... Figure 2 Not shown in the image.

[0099] Table 3 shows the basic parameters of the wide-angle lens 200 of Embodiment 2, where the units for radius of curvature, thickness / distance, and focal length are all millimeters (mm).

[0100]

[0101] Table 3

[0102] In Example 2, the object-side and image-side surfaces of any one of the lenses from the second lens L2 to the seventh lens L7 are aspherical. Table 4 shows the conic coefficient k and higher-order coefficients A4, A6, A8, and A14 that can be used for each aspherical mirror S3-S14 in Example 2. 10 A 12 A 14 and A 16 .

[0103] Face number k A4 A6 A8 A10 A12 A14 A16 S3 2.876 4.50E-03 -7.45E-05 -2.10E-06 5.32E-07 -3.75E-08 2.06E-10 -4.11E-10 S4 14.146 7.02E-03 -1.88E-04 1.83E-07 3.50E-06 -4.23E-07 -8.03E-10 -1.98E-08 S5 -70.812 -4.12E-03 -2.93E-04 6.44E-05 -9.92E-06 2.84E-06 -3.92E-08 3.54E-08 S6 1.349 3.87E-03 -1.46E-04 1.78E-04 2.31E-05 4.53E-06 -1.13E-06 -1.15E-06 S7 -0.747 -2.47E-04 -1.33E-04 -1.60E-04 1.67E-05 1.83E-06 3.24E-07 -7.30E-08 S8 4.432 -1.09E-02 7.62E-04 7.24E-05 -1.17E-05 -4.98E-07 1.62E-07 7.60E-08 S9 3.185 -3.39E-03 1.02E-03 -2.20E-05 5.70E-06 -3.28E-07 -3.60E-08 -4.37E-10 S10 13.392 4.74E-03 3.51E-04 2.90E-05 -2.50E-06 -3.10E-07 9.33E-09 1.61E-09 S11 -37.152 -7.59E-03 -5.60E-04 3.26E-05 4.88E-07 3.82E-07 5.88E-08 5.47E-10 S12 17.995 -7.18E-03 -1.72E-04 1.13E-05 1.31E-06 2.13E-08 1.81E-08 1.87E-09 S13 18.308 -2.25E-02 7.65E-04 -4.02E-05 -5.16E-06 9.96E-07 -3.59E-08 -4.80E-09 S14 -20.702 -6.98E-03 3.68E-04 -1.91E-05 1.52E-07 9.19E-09 1.29E-10 -1.25E-11

[0104] Table 4

[0105] Example 3

[0106] The following is for reference Figure 3 Describes a wide-angle lens according to Embodiment 3 of this application. Figure 3 This is a schematic diagram of the structure of a wide-angle lens according to Embodiment 3 of this application.

[0107] like Figure 3 As shown, the wide-angle lens 300 includes, in sequence along the optical axis from the object side to the image side: a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7. The aperture stop STO can be positioned between the third lens L3 and the fourth lens L4.

[0108] The first lens L1 has negative optical power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens L2 has negative optical power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens L3 has positive optical power, with its object-side surface S5 being convex and its image-side surface S6 being convex. The fourth lens L4 has positive optical power, with its object-side surface S7 being convex and its image-side surface S8 being convex. The fifth lens L5 has negative optical power, with its object-side surface S9 being concave and its image-side surface S10 being convex. The sixth lens L6 has positive optical power, with its object-side surface S11 being convex and its image-side surface S12 being convex. The seventh lens L7 has negative optical power, with its object-side surface S13 being concave and its image-side surface S14 being concave. The filter CG has an object-side surface S15 and an image-side surface S16. Light from the object passes sequentially through surfaces S1 to S16 and is finally imaged onto the imaging plane IMA. It should be noted that surfaces S1 to S16 are... Figure 3 Not shown in the image.

[0109] Table 5 shows the basic parameters of the wide-angle lens 300 of Embodiment 3, where the units for radius of curvature, thickness / distance, and focal length are all millimeters (mm).

[0110]

[0111] Table 5

[0112] In Example 3, the object-side and image-side surfaces of any one of the lenses from the second lens L2 to the seventh lens L7 are aspherical. Table 6 shows the conic coefficient k and higher-order coefficients A4, A6, A8, and A14 that can be used for each aspherical mirror S3-S14 in Example 3. 10 A 12 A 14 and A 16 .

[0113]

[0114]

[0115] Table 6

[0116] Example 4

[0117] The following is for reference Figure 4 Describes a wide-angle lens according to Embodiment 4 of this application. Figure 4 This is a schematic diagram of the structure of a wide-angle lens according to Embodiment 4 of this application.

[0118] like Figure 4 As shown, the wide-angle lens 400 includes, in sequence along the optical axis from the object side to the image side: a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7. The aperture stop STO can be positioned between the third lens L3 and the fourth lens L4.

[0119] The first lens L1 has negative optical power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens L2 has negative optical power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens L3 has positive optical power, with its object-side surface S5 being convex and its image-side surface S6 being convex. The fourth lens L4 has positive optical power, with its object-side surface S7 being convex and its image-side surface S8 being convex. The fifth lens L5 has negative optical power, with its object-side surface S9 being concave and its image-side surface S10 being convex. The sixth lens L6 has positive optical power, with its object-side surface S11 being convex and its image-side surface S12 being convex. The seventh lens L7 has negative optical power, with its object-side surface S13 being concave and its image-side surface S14 being concave. The filter CG 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 plane IMA. It should be noted that surfaces S1 to S16 are... Figure 4 Not shown in the image.

[0120] Table 7 shows the basic parameters of the wide-angle lens 400 of Embodiment 4, where the units for radius of curvature, thickness / distance, and focal length are all millimeters (mm).

[0121]

[0122] Table 7

[0123] In Example 4, the object-side and image-side surfaces of any one of the lenses from the second lens L2 to the seventh lens L7 are aspherical. Table 8 shows the conic coefficient k and higher-order coefficients A4, A6, A8, and A14 that can be used for each aspherical mirror S3-S14 in Example 4. 10 A 12 A 14 and A 16 .

[0124] Face number k A4 A6 A8 A10 A12 A14 A16 S3 23.535 1.20E-03 -3.56E-05 4.68E-07 -5.33E-08 -1.07E-09 3.23E-10 -3.33E-11 S4 36.235 4.11E-03 -1.14E-04 -7.03E-06 2.45E-06 1.17E-08 1.28E-07 -3.06E-08 S5 10.615 -8.18E-04 3.90E-05 -1.86E-05 1.07E-05 2.91E-07 -1.75E-09 -2.39E-08 S6 -3.402 6.57E-03 -1.14E-03 1.59E-04 2.74E-05 -5.44E-06 1.49E-05 -4.77E-06 S7 39.964 2.81E-03 -1.51E-03 -4.42E-04 6.69E-05 6.26E-07 9.67E-07 -1.62E-06 S8 -6.766 -1.38E-02 5.65E-05 -8.76E-05 -1.13E-05 -3.71E-06 1.47E-06 -3.30E-07 S9 14.840 -4.01E-03 7.79E-04 1.54E-05 1.20E-05 -2.06E-06 -7.81E-07 1.17E-07 S10 50.000 -4.73E-03 8.23E-04 9.38E-05 -3.72E-06 -6.09E-08 -1.73E-07 1.18E-08 S11 -21.778 -8.96E-03 -2.07E-04 6.97E-06 4.97E-06 -5.84E-07 -6.63E-08 1.92E-08 S12 7.305 -2.52E-03 -6.80E-04 1.08E-05 -1.36E-07 -9.74E-08 -3.25E-08 8.70E-10 S13 5.765 -2.40E-02 1.62E-03 -1.16E-04 7.57E-07 1.31E-07 -7.04E-09 -2.81E-09 S14 -25.839 -7.30E-03 3.73E-04 -1.36E-05 -5.32E-08 1.23E-08 1.53E-10 -1.43E-11

[0125] Table 8

[0126] Example 5

[0127] The following is for reference Figure 5 Describes a wide-angle lens according to Embodiment 5 of this application. Figure 5 This is a schematic diagram of the structure of a wide-angle lens according to Embodiment 5 of this application.

[0128] like Figure 5 As shown, the wide-angle lens 500 includes, in sequence along the optical axis from the object side to the image side: a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7. The aperture stop STO can be positioned between the third lens L3 and the fourth lens L4.

[0129] The first lens L1 has negative optical power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens L2 has positive optical power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens L3 has positive optical power, with its object-side surface S5 being concave and its image-side surface S6 being convex. The fourth lens L4 has positive optical power, with its object-side surface S7 being convex and its image-side surface S8 being convex. The fifth lens L5 has negative optical power, with its object-side surface S9 being concave and its image-side surface S10 being convex. The sixth lens L6 has positive optical power, with its object-side surface S11 being convex and its image-side surface S12 being concave. The seventh lens L7 has negative optical power, with its object-side surface S13 being concave and its image-side surface S14 being concave. The filter CG has an object-side surface S15 and an image-side surface S16. Light from the object passes sequentially through surfaces S1 to S16 and is finally imaged onto the imaging plane IMA. It should be noted that surfaces S1 to S16 are... Figure 5 Not shown in the image.

[0130] Table 9 shows the basic parameters of the wide-angle lens 500 of Embodiment 5, where the units for radius of curvature, thickness / distance, and focal length are all millimeters (mm).

[0131]

[0132]

[0133] Table 9

[0134] In Example 5, the object-side and image-side surfaces of any one of the lenses from the second lens L2 to the seventh lens L7 are aspherical. Table 10 gives the conic coefficient k and higher-order coefficients A4, A6, A8, and A14 that can be used for each aspherical mirror S3-S14 in Example 5. 10 A 12 A 14 and A 16 .

[0135] Face number k A4 A6 A8 A10 A12 A14 A16 S3 -5.410 7.55E-04 -2.21E-05 3.65E-07 -1.22E-08 -1.04E-09 1.86E-10 -1.03E-11 S4 23.157 1.94E-03 -9.54E-05 -6.37E-06 -9.58E-07 -2.57E-07 6.73E-08 -8.05E-09 S5 -123 -1.24E-04 -4.96E-05 -3.69E-05 3.55E-06 3.98E-08 -3.67E-09 -1.58E-09 S6 -2.729 7.94E-03 -3.21E-03 5.28E-04 9.05E-05 -4.24E-05 4.02E-06 1.10E-07 S7 28.567 3.15E-03 -3.41E-03 -3.77E-04 1.62E-04 2.51E-06 -6.90E-06 -2.06E-06 S8 -8.141 -1.25E-02 -3.52E-04 9.29E-05 2.10E-06 -7.27E-06 4.76E-07 4.04E-08 S9 0.580 -3.36E-03 7.64E-04 3.43E-05 2.40E-05 -1.53E-06 -7.85E-07 8.18E-08 S10 -8.234 -3.46E-03 9.44E-04 3.28E-05 -7.81E-06 2.15E-07 7.12E-08 -1.31E-08 S11 -3.531 -5.68E-03 1.63E-04 -2.53E-05 1.31E-06 -1.28E-07 -1.16E-08 5.63E-10 S12 -50.004 -2.90E-03 -2.23E-04 9.55E-06 -4.68E-07 -1.25E-08 -7.07E-09 2.58E-10 S13 6.685 -2.28E-02 1.55E-03 -5.31E-05 -1.14E-06 -3.03E-08 2.58E-08 -1.07E-09 S14 -50 -1.10E-02 5.59E-04 -1.86E-05 1.24E-07 1.16E-08 2.56E-10 -1.92E-11

[0136] Table 10

[0137] Example 6

[0138] The following is for reference Figure 6 Describes a wide-angle lens according to Embodiment 6 of this application. Figure 6 This is a schematic diagram of the structure of a wide-angle lens according to Embodiment 6 of this application.

[0139] like Figure 6 As shown, the wide-angle lens 600 includes, in sequence along the optical axis from the object side to the image side: a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7. The aperture stop STO can be positioned between the third lens L3 and the fourth lens L4.

[0140] The first lens L1 has negative optical power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens L2 has positive optical power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens L3 has positive optical power, with its object-side surface S5 being convex and its image-side surface S6 being convex. The fourth lens L4 has positive optical power, with its object-side surface S7 being convex and its image-side surface S8 being convex. The fifth lens L5 has negative optical power, with its object-side surface S9 being concave and its image-side surface S10 being convex. The sixth lens L6 has positive optical power, with its object-side surface S11 being convex and its image-side surface S12 being convex. The seventh lens L7 has negative optical power, with its object-side surface S13 being concave and its image-side surface S14 being concave. The filter CG has an object-side surface S15 and an image-side surface S16. Light from the object passes sequentially through surfaces S1 to S16 and is finally imaged onto the imaging plane IMA. It should be noted that surfaces S1 to S16 are... Figure 6 Not shown in the image.

[0141] Table 11 shows the basic parameters of the wide-angle lens 600 of Embodiment 6, wherein the units for radius of curvature, thickness / distance and focal length are millimeters (mm).

[0142]

[0143] Table 11

[0144] In Example 6, the object-side and image-side surfaces of any one of the lenses from the second lens L2 to the seventh lens L7 are aspherical. Table 12 gives the conic coefficient k and higher-order coefficients A4, A6, A8, and A14 that can be used for each aspherical mirror S3-S14 in Example 6. 10 A 12 A 14 and A 16 .

[0145] Face number k A4 A6 A8 A10 A12 A14 A16 S3 -4.033 1.29E-03 -3.05E-05 5.47E-07 -6.34E-08 -3.78E-09 1.79E-11 0.00E+00 S4 16.265 4.08E-03 -1.76E-04 -8.56E-06 -1.86E-06 -5.04E-07 8.36E-08 0.00E+00 S5 23.941 -1.55E-04 -5.32E-05 -5.25E-05 4.83E-06 -3.30E-07 5.05E-08 1.12E-09 S6 -8.269 7.38E-03 -1.64E-03 3.39E-04 7.87E-05 -3.20E-05 5.59E-06 4.27E-07 S7 18.706 2.69E-03 -2.95E-03 -2.87E-04 1.47E-04 -1.81E-05 -6.10E-06 -2.83E-07 S8 -8.258 -1.25E-02 -7.23E-04 -3.42E-05 3.34E-06 -3.45E-06 -7.34E-07 6.27E-08 S9 6.253 -3.53E-03 -2.68E-04 -1.94E-04 4.66E-05 5.45E-06 -6.62E-07 -8.18E-09 S10 27.942 -5.92E-03 6.24E-04 1.40E-04 -1.81E-06 -2.78E-07 -2.90E-07 4.30E-08 S11 -49.717 -8.18E-03 2.89E-04 8.01E-05 3.28E-06 -1.80E-06 -1.96E-07 2.75E-08 S12 16.849 -3.34E-03 -4.19E-04 2.64E-05 2.04E-06 -4.94E-08 -1.67E-08 -1.81E-09 S13 14.782 -3.02E-02 2.24E-03 -6.94E-05 -5.26E-06 -1.65E-07 7.61E-08 -3.94E-09 S14 -15.764 -1.10E-02 8.07E-04 -3.09E-05 -9.35E-08 2.30E-08 5.75E-10 -3.04E-11

[0146] Table 12

[0147] In summary, the conditional expressions in Examples 1 to 6 satisfy the relationships shown in Table 13.

[0148] Conditional / Example 1 2 3 4 5 6 D / F1 -0.858 -0.785 -0.914 -0.960 -1.144 -1.015 F1 / F -2.536 -2.264 -2.620 -2.526 -1.867 -2.039 (R21-R22) / (R21+R22) 0.018 0.158 0.310 0.135 -0.149 -0.061 F3 / F 2.894 1.982 2.316 2.006 2.765 2.337 F4 / F 1.584 1.674 1.752 2.206 1.560 1.938 F5 / F -6.475 -7.272 -5.151 -6.860 -4.755 -4.939 F6 / F 8.165 6.208 3.162 2.902 5.669 2.722 F7 / F -1.514 -1.498 -1.274 -1.193 -1.597 -1.256 F34 / F 1.051 0.955 1.091 1.126 1.040 1.158 F7 / F1 0.597 0.662 0.486 0.472 0.855 0.616 F12 / F67 1.104 0.833 0.657 0.740 0.795 0.569 ∑CT / TTL 0.651 0.550 0.595 0.600 0.583 0.615 ET1 / CT1 2.886 1.576 1.828 1.739 1.502 1.621 R11 / CT1 30.446 9.173 15.941 14.629 11.475 15.064 T12 / TTL 0.108 0.145 0.180 0.188 0.166 0.177 ET4 / CT4 0.655 0.400 0.490 0.479 0.322 0.584 T34 / F34 0.028 0.032 0.085 0.059 0.046 0.053 ET6 / CT6 0.655 0.581 0.408 0.368 0.591 0.333 (CT6+CT7) / T67 1.186 1.677 1.610 1.935 0.998 2.260 TTL / IH 3.793 2.784 3.581 3.618 3.813 3.608 BFL / F 0.234 0.269 0.275 0.258 0.235 0.278 IH / ENPD 3.297 3.634 3.559 3.618 3.255 3.537

[0149] Table 13

[0150] This application also provides an imaging device, wherein the electronic photosensitive element may be a photocoupled device (CCD) or a complementary metal oxide semiconductor device (CMOS), and the imaging device is equipped with the wide-angle lens described above.

[0151] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A wide-angle lens, characterized in that, Along the optical axis from the object side to the image side, in sequence: The first lens has negative optical power and its object side is convex. The second lens has optical power; The third lens has positive optical power and its image-side surface is convex. The fourth lens has positive optical power; The fifth lens has negative optical power; The sixth lens has positive optical power and its object-side surface is convex; and The seventh lens has negative optical power; The wide-angle lens has seven lenses with optical power. The effective focal length F6 of the sixth lens and the total effective focal length F of the wide-angle lens satisfy the following condition: 2.722≤F6 / F≤8.

165.

2. The wide-angle lens according to claim 1, characterized in that, The image-side surface of the first lens is concave.

3. The wide-angle lens according to claim 1, characterized in that, The object-side surface of the second lens is convex, and the image-side surface is concave.

4. The wide-angle lens according to claim 1, characterized in that, The object-side surface of the fourth lens is convex, and the image-side surface is also convex.

5. The wide-angle lens according to claim 1, characterized in that, The object-side surface of the fifth lens is concave, and the image-side surface is convex.

6. The wide-angle lens according to claim 1, characterized in that, The object-side surface of the seventh lens is concave, and the image-side surface is also concave.

7. The wide-angle lens according to any one of claims 1 to 6, characterized in that, The maximum optical aperture D of the wide-angle lens and the effective focal length F1 of the first lens satisfy the following condition: -1.144≤D / F1≤-0.

785.

8. The wide-angle lens according to any one of claims 1 to 6, characterized in that, The effective focal length F1 of the first lens and the total effective focal length F of the wide-angle lens satisfy: -2.620≤F1 / F≤-1.

867.

9. The wide-angle lens according to any one of claims 1 to 6, characterized in that, The radius of curvature R21 of the object side of the second lens and the radius of curvature R22 of the image side of the second lens satisfy: -0.149≤(R21-R22) / (R21+R22)≤0.

310.

10. The wide-angle lens according to any one of claims 1 to 6, characterized in that, The effective focal length F3 of the third lens and the total effective focal length F of the wide-angle lens satisfy the following condition: 1.982≤F3 / F≤2.

894.

11. The wide-angle lens according to any one of claims 1 to 6, characterized in that, The effective focal length F4 of the fourth lens and the total effective focal length F of the wide-angle lens satisfy the following condition: 1.560≤F4 / F≤2.

206.

12. The wide-angle lens according to any one of claims 1 to 6, characterized in that, The effective focal length F5 of the fifth lens and the total effective focal length F of the wide-angle lens satisfy the following condition: -7.272≤F5 / F≤-4.

755.

13. The wide-angle lens according to any one of claims 1 to 6, characterized in that, The effective focal length F7 of the seventh lens and the total effective focal length F of the wide-angle lens satisfy the following condition: -1.597≤F7 / F≤-1.

193.

14. The wide-angle lens according to any one of claims 1 to 6, characterized in that, The combined focal length F34 of the third lens and the fourth lens satisfies the following condition with respect to the total effective focal length F of the wide-angle lens: 0.955≤F34 / F≤1.

158.

15. The wide-angle lens according to any one of claims 1 to 6, characterized in that, The effective focal length F1 of the first lens and the effective focal length F7 of the seventh lens satisfy the condition: 0.472≤F7 / F1≤0.

855.

16. The wide-angle lens according to any one of claims 1 to 6, characterized in that, The combined focal length F12 of the first lens and the second lens and the combined focal length F67 of the sixth lens and the seventh lens satisfy the following condition: 0.569≤F12 / F67≤1.

104.

17. The wide-angle lens according to any one of claims 1 to 6, characterized in that, The sum of the center thicknesses of each lens in the first to the seventh lens along the optical axis, ∑CT, satisfies the following condition with respect to the total optical length TTL of the wide-angle lens: 0.550≤∑CT / TTL≤0.

651.

18. The wide-angle lens according to any one of claims 1 to 6, characterized in that, The edge thickness ET1 of the first lens and the center thickness CT1 of the first lens on the optical axis satisfy the following condition: 1.502≤ET1 / CT1≤2.

886.

19. The wide-angle lens according to any one of claims 1 to 6, characterized in that, The radius of curvature R11 of the object side of the first lens and the center thickness CT1 of the first lens on the optical axis satisfy: 9.173≤R11 / CT1≤30.

446.

20. The wide-angle lens according to any one of claims 1 to 6, characterized in that, The air gap T12 between the first lens and the second lens on the optical axis and the total optical length TTL of the wide-angle lens satisfy the following condition: 0.108≤T12 / TTL≤0.

188.

21. The wide-angle lens according to any one of claims 1 to 6, characterized in that, The edge thickness ET4 of the fourth lens and the center thickness CT4 of the fourth lens on the optical axis satisfy the following condition: 0.322≤ET4 / CT4≤0.

655.

22. The wide-angle lens according to any one of claims 1 to 6, characterized in that, The air gap T34 between the third lens and the fourth lens on the optical axis and the combined focal length F34 of the third lens and the fourth lens satisfy: 0≤T34 / F34≤0.

085.

23. The wide-angle lens according to any one of claims 1 to 6, characterized in that, The edge thickness ET6 of the sixth lens and the center thickness CT6 of the sixth lens on the optical axis satisfy the following condition: 0.333≤ET6 / CT6≤0.

655.

24. The wide-angle lens according to any one of claims 1 to 6, characterized in that, The center thickness CT6 of the sixth lens on the optical axis, the center thickness CT7 of the seventh lens on the optical axis, and the air gap T67 of the sixth and seventh lenses on the optical axis satisfy the following condition: 0.998≤(CT6+CT7) / T67≤2.

260.

25. The wide-angle lens according to any one of claims 1 to 6, characterized in that, The total optical length TTL of the wide-angle lens and the maximum image height IH corresponding to the maximum field of view of the wide-angle lens satisfy the following condition: 2.784≤TTL / IH≤3.

813.

26. The wide-angle lens according to any one of claims 1 to 6, characterized in that, The back focal length BFL of the wide-angle lens and the total effective focal length F of the wide-angle lens satisfy the condition: 0.234≤BFL / F≤0.

3.

27. The wide-angle lens according to any one of claims 1 to 6, characterized in that, The maximum image height IH corresponding to the maximum field of view of the wide-angle lens and the entrance pupil diameter ENPD of the wide-angle lens satisfy the following condition: 3.255≤IH / ENPD≤3.634.

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