Optical lens and electronic equipment with same

Abstract

The invention provides an optical lens and electronic equipment with the same, and the optical lens comprises a first lens which has positive focal power, the first side surface of the first lens is a convex surface, and the second side surface of the first lens is a concave surface; the second lens has negative focal power, and the first side face of the second lens and the second side face of the second lens are both concave faces; the third lens has positive focal power, and the first side surface of the third lens and the second side surface of the third lens are convex surfaces; the fourth lens has positive focal power, and at least one of the first side surface of the fourth lens and the second side surface of the fourth lens is a convex surface; and the fifth lens has focal power, the first side surface of the fifth lens is a convex surface, and the second side surface of the fifth lens is a concave surface. According to the invention, at least one problem of difficulty in miniaturization of an optical lens, poor imaging quality in a dark environment, poor resolution, serious ghost image, and incapability of giving consideration to low cost and stability in the prior art is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of optical imaging equipment, and in particular to an optical lens and an electronic device having the same. Background Art

[0002] With the development of science and technology and the increase in application needs, optical lenses have been widely used in many devices, especially in vehicle-mounted applications. Optical lenses are key components for automatic driving assistance systems to obtain external information. With the rapid development of automatic driving assistance systems, users' demand for optical lenses is also increasing. In order to detect farther distances, optical lenses need to have the characteristics of large light flux, but the existing optical lenses with large image planes and large light flux are large in size, which is difficult to meet special installation positions, and the resolution is poor, and the ghost image is more serious, causing the automatic driving assistance system to misjudge the current road conditions and fail to meet the requirements of safe driving. In addition, in order to achieve the effect of reducing costs and lightness, optical lenses usually use plastic lenses. However, the thermal expansion and contraction characteristics of plastic lenses are difficult to overcome, resulting in the best image plane deviating from the chip at high and low temperatures of -40℃ to 120℃, resulting in unsharp images and other adverse effects, and the high plasticization system has poor thermal stability. After returning from high temperature to room temperature, the resolution cannot meet the requirements.

[0003] That is to say, the optical lens in the prior art has at least one of the following problems: difficulty in miniaturization, poor imaging quality in dark environments, poor resolution, severe ghost images, and inability to balance low cost and stability. Summary of the invention

[0004] The main purpose of the present invention is to provide an optical lens and an electronic device having the same, so as to solve at least one of the problems in the prior art that the optical lens is difficult to miniaturize, has poor imaging quality in dark environments, has poor resolution, has severe ghost images, and cannot balance low cost and stability.

[0005] To achieve the above-mentioned object, according to one aspect of the present invention, there is provided an optical lens, comprising: a first lens, the first lens having positive optical power, a first side surface of the first lens being a convex surface, and a second side surface of the first lens being a concave surface; a second lens, the second lens having negative optical power, a first side surface of the second lens and a second side surface of the second lens being concave surfaces; a third lens, the third lens having positive optical power, a first side surface of the third lens and a second side surface of the third lens being convex surfaces; a fourth lens, the fourth lens having positive optical power, at least one of a first side surface of the fourth lens and a second side surface of the fourth lens being a convex surface; and a fifth lens, the fifth lens having optical power, a first side surface of the fifth lens being a convex surface, and a second side surface of the fifth lens being a concave surface.

[0006] Furthermore, the first side surface of the fourth lens and the second side surface of the fourth lens are both convex surfaces.

[0007] Furthermore, the first side surface of the fourth lens is a concave surface, and the second side surface of the fourth lens is a convex surface.

[0008] Furthermore, the first side surface of the fourth lens is a convex surface, and the second side surface of the fourth lens is a concave surface.

[0009] Further, the fifth lens has positive refractive power.

[0010] Furthermore, the fifth lens has negative refractive power.

[0011] Furthermore, both the first lens and the fourth lens are aspherical lenses.

[0012] Furthermore, both the first lens and the fifth lens are aspherical lenses.

[0013] Furthermore, the optical lens also includes a stop, and the stop is located between the fourth lens and the fifth lens.

[0014] Furthermore, the optical lens also includes a stop, and the stop is located between the third lens and the fourth lens.

[0015] Further, the first side surface of the first lens and the second side surface of the fourth lens have an inflection point.

[0016] Furthermore, the second lens and the third lens are cemented to form a cemented lens.

[0017] Furthermore, the focal length value F23 of the cemented lens and the focal length value F of the entire set of optical lenses satisfy: F23 / F≤8.

[0018] Furthermore, a curvature radius R9 of the first side surface of the fifth lens, a curvature radius R10 of the second side surface of the fifth lens, and a center thickness d9 of the fifth lens satisfy: 0.5≤R9 / (R10+d9)≤1.5.

[0019] Furthermore, an air interval d5 between the third lens and the fourth lens and a total optical length TTL of the optical lens satisfy: d5 / TTL≤0.15.

[0020] Furthermore, the central thickness d4 of the third lens and the total optical length TTL of the optical lens satisfy: 0.1≤d4 / TTL.

[0021] Furthermore, the optical back focus BFL of the optical lens and the total optical length TTL of the optical lens satisfy: 0.09≤BFL / TTL.

[0022] Furthermore, the total optical length TTL of the optical lens, the image height H corresponding to the maximum field angle of the optical lens, and the arc value θ of the maximum field angle of the optical lens satisfy: TTL / H / θ≤20.

[0023] Furthermore, the entire focal length value F of the optical lens and the entrance pupil diameter ENPD of the optical lens satisfy: F / ENPD≤1.5.

[0024] Furthermore, the entire focal length value F of the optical lens, the entrance pupil diameter ENPD of the optical lens, and the maximum clear aperture D of the first side surface of the first lens corresponding to the maximum field angle of the optical lens satisfy the following: F / ENPD / D≤0.1.

[0025] Furthermore, a curvature radius R1 of the first side surface of the first lens and a focal length value F of the entire optical lens group satisfy: 0.8≤R1 / F≤2.

[0026] Furthermore, the focal length value F4 of the fourth lens and the focal length value F of the entire optical lens group satisfy: 0.8≤F4 / F≤4.

[0027] Furthermore, the entire focal length value F of the optical lens, the arc value θ of the maximum field angle of the optical lens, and the maximum light clearance D of the first side surface of the first lens corresponding to the maximum field angle of the optical lens satisfy the following: 0.2≤(F*θ) / D.

[0028] Furthermore, the Abbe number VD2 of the second lens element and the Abbe number VD3 of the third lens element satisfy: 80≤VD2+VD3.

[0029] Furthermore, the maximum light clearance D of the first side surface of the first lens corresponding to the maximum field angle of the optical lens, the image height H corresponding to the maximum field angle of the optical lens, and the entire focal length value F of the optical lens satisfy: 0.06≤D / H / F.

[0030] Furthermore, the image height H corresponding to the maximum field angle of the optical lens and the entire focal length value F of the optical lens satisfy: 1.2≤F / H≤3.8.

[0031] Furthermore, the clear aperture D9 of the first side surface of the fifth lens, the optical back focus BFL of the optical lens, and the image height H corresponding to the maximum field angle of the optical lens satisfy: 7.2≤D9*BFL / H.

[0032] Furthermore, the clear aperture D10 of the second side surface of the fifth lens, the optical back focus BFL of the optical lens, and the image height H corresponding to the maximum field angle of the optical lens satisfy: 5.5≤D10*BFL / H≤15.

[0033] Furthermore, a curvature radius R1 of the first side surface of the first lens, a curvature radius R2 of the second side surface of the first lens, and a center thickness d1 of the first lens satisfy: 0.49≤R1 / (R2+d1)≤1.5.

[0034] Furthermore, the focal length F3 of the third lens element and the focal length F4 of the fourth lens element satisfy: 0.1≤F3 / F4≤1.

[0035] Furthermore, the focal length value F5 of the fifth lens and the focal length value F of the entire optical lens group satisfy: -11≤F5 / F≤150.

[0036] Furthermore, the vector height SAG(S4) of the first side surface of the third lens and the clear aperture D4 of the first side surface of the third lens satisfy: -0.3≤arctan(SAG(S4) / D4).

[0037] Furthermore, the central thickness d6 of the fourth lens and the total optical length TTL of the optical lens satisfy: 0.07≤d6 / TTL.

[0038] According to another aspect of the present invention, there is provided an optical lens, comprising: a first lens, the first lens having positive optical power; a second lens, the second lens having negative optical power; a third lens, the third lens having positive optical power; a fourth lens, the fourth lens having positive optical power; and a fifth lens, the fifth lens having optical power; wherein a combined focal length value F23 of the second lens and the third lens and a focal length value F of the entire group of the optical lens satisfy the following condition: F23 / F≤8.

[0039] Furthermore, the first side surface of the first lens is a convex surface, and the second side surface of the first lens is a concave surface.

[0040] Furthermore, the first side surface of the second lens and the second side surface of the second lens are both concave surfaces.

[0041] Furthermore, the first side surface of the third lens and the second side surface of the third lens are both convex surfaces.

[0042] Furthermore, the first side surface of the fourth lens and the second side surface of the fourth lens are both convex surfaces.

[0043] Furthermore, the first side surface of the fourth lens is a concave surface, and the second side surface of the fourth lens is a convex surface.

[0044] Furthermore, the first side surface of the fourth lens is a convex surface, and the second side surface of the fourth lens is a concave surface.

[0045] Furthermore, the fifth lens has positive optical power, the first side surface of the fifth lens is a convex surface, and the second side surface of the fifth lens is a concave surface.

[0046] Furthermore, the fifth lens has negative optical power, the first side surface of the fifth lens is a convex surface, and the second side surface of the fifth lens is a concave surface.

[0047] Furthermore, both the first lens and the fourth lens are aspherical lenses.

[0048] Furthermore, both the first lens and the fifth lens are aspherical lenses.

[0049] Furthermore, the optical lens also includes a stop, and the stop is located between the fourth lens and the fifth lens.

[0050] Furthermore, the optical lens also includes a stop, and the stop is located between the third lens and the fourth lens.

[0051] Further, the first side surface of the first lens and the second side surface of the fourth lens have an inflection point.

[0052] Furthermore, the second lens and the third lens are cemented to form a cemented lens.

[0053] Furthermore, a curvature radius R9 of the first side surface of the fifth lens, a curvature radius R10 of the second side surface of the fifth lens, and a center thickness d9 of the fifth lens satisfy: 0.5≤R9 / (R10+d9)≤1.5.

[0054] Furthermore, an air interval d5 between the third lens and the fourth lens and a total optical length TTL of the optical lens satisfy: d5 / TTL≤0.15.

[0055] Furthermore, the central thickness d4 of the third lens and the total optical length TTL of the optical lens satisfy: 0.1≤d4 / TTL.

[0056] Furthermore, the optical back focus BFL of the optical lens and the total optical length TTL of the optical lens satisfy: 0.09≤BFL / TTL.

[0057] Furthermore, the total optical length TTL of the optical lens, the image height H corresponding to the maximum field angle of the optical lens, and the arc value θ of the maximum field angle of the optical lens satisfy: TTL / H / θ≤20.

[0058] Furthermore, the entire focal length value F of the optical lens and the entrance pupil diameter ENPD of the optical lens satisfy: F / ENPD≤1.5.

[0059] Furthermore, the entire focal length value F of the optical lens, the entrance pupil diameter ENPD of the optical lens, and the maximum clear aperture D of the first side surface of the first lens corresponding to the maximum field angle of the optical lens satisfy the following: F / ENPD / D≤0.1.

[0060] Furthermore, a curvature radius R1 of the first side surface of the first lens and a focal length value F of the entire optical lens group satisfy: 0.8≤R1 / F≤2.

[0061] Furthermore, the focal length value F4 of the fourth lens and the focal length value F of the entire optical lens group satisfy: 0.8≤F4 / F≤4.

[0062] Furthermore, the entire focal length value F of the optical lens, the arc value θ of the maximum field angle of the optical lens, and the maximum light clearance D of the first side surface of the first lens corresponding to the maximum field angle of the optical lens satisfy the following: 0.2≤(F*θ) / D.

[0063] Furthermore, the Abbe number VD2 of the second lens element and the Abbe number VD3 of the third lens element satisfy: 80≤VD2+VD3.

[0064] Furthermore, the maximum light clearance D of the first side surface of the first lens corresponding to the maximum field angle of the optical lens, the image height H corresponding to the maximum field angle of the optical lens, and the entire focal length value F of the optical lens satisfy: 0.06≤D / H / F.

[0065] Furthermore, the image height H corresponding to the maximum field angle of the optical lens and the entire focal length value F of the optical lens satisfy: 1.2≤F / H≤3.8.

[0066] Furthermore, the clear aperture D9 of the first side surface of the fifth lens, the optical back focus BFL of the optical lens, and the image height H corresponding to the maximum field angle of the optical lens satisfy: 7.2≤D9*BFL / H.

[0067] Furthermore, the clear aperture D10 of the second side surface of the fifth lens, the optical back focus BFL of the optical lens, and the image height H corresponding to the maximum field angle of the optical lens satisfy: 5.5≤D10*BFL / H≤15.

[0068] Furthermore, a curvature radius R1 of the first side surface of the first lens, a curvature radius R2 of the second side surface of the first lens, and a center thickness d1 of the first lens satisfy: 0.49≤R1 / (R2+d1)≤1.5.

[0069] Furthermore, the focal length F3 of the third lens element and the focal length F4 of the fourth lens element satisfy: 0.1≤F3 / F4≤1.

[0070] Furthermore, the focal length value F5 of the fifth lens and the focal length value F of the entire optical lens group satisfy: -11≤F5 / F≤150.

[0071] Furthermore, the vector height SAG(S4) of the first side surface of the third lens and the clear aperture D4 of the first side surface of the third lens satisfy: -0.3≤arctan(SAG(S4) / D4).

[0072] Furthermore, the central thickness d6 of the fourth lens and the total optical length TTL of the optical lens satisfy: 0.07≤d6 / TTL.

[0073] According to another aspect of the present invention, there is provided an electronic device comprising the above-mentioned optical lens and an imaging element for converting an optical image formed by the optical lens into an electrical signal.

[0074] The above technical solution is capable of converging light by setting the first lens to have positive optical power, and by setting the first side surface of the first lens to be convex and the second side surface of the first lens to be concave, so that the shape of the first lens is close to concentric circles, which is conducive to shrinking the front light, reducing the height at which the light enters the second lens, and helping to reduce the front port diameter of the optical lens.

[0075] By setting the second lens to have a negative optical focal length, receiving the light emitted by the first lens and diverging it appropriately, and setting the first side surface of the second lens and the second side surface of the second lens to be concave, it is beneficial for the light to be emitted smoothly and improve the aberration.

[0076] By setting the third lens to have a positive focal length, the light is converged. At the same time, the first side surface of the third lens and the second side surface of the third lens are both convex, so that the light emitted by the second lens is more reasonably converged, and the defocus of the peripheral field of view and the central field of view has a greater adjustment ability, thereby improving the imaging quality.

[0077] By gluing the second lens and the third lens together to form a cemented lens, the material combination of the two lenses is reasonably controlled, chromatic aberration is reduced, and the combined focal length of the cemented lens is controlled, the trend of light entering the cemented lens can be effectively controlled, and the aberration caused by the large-angle light entering through the first lens can be reduced. At the same time, the lens structure is made compact, which is conducive to miniaturization. The gluing surface has a large opening angle, which is conducive to rapid focusing of peripheral light and improved imaging quality.

[0078] By setting the fourth lens to have a positive focal length, the light collected at the front end can be compressed and the light can be smoothly transitioned to the rear, thereby reducing the sensitivity of the system, while reducing the diameter of the rear port of the optical lens and reducing the cost. Optionally, the first side of the fourth lens and the second side of the fourth lens are both convex. The light can be further converged so that the light of the edge field of view is deflected in the direction of the optical axis after passing through the second side of the fourth lens, which is beneficial to reducing the diameter of the rear port of the optical lens. Of course, it can also be set that the first side of the fourth lens is concave and the second side of the fourth lens is convex. It is beneficial to receive the light passing through the third lens, the light of each field of view is deflected, the energy loss is small, and the light is smoothly transitioned, which is beneficial to reducing the sensitivity of the lens. Of course, it can also be set that the first side of the fourth lens is convex and the second side of the fourth lens is concave, that is, the fourth lens is meniscus-shaped, which is beneficial to collecting light of a large field of view and improving the light throughput of the optical lens; the second side of the fourth lens is concave, and the optical path of the light of the edge field of view and the central field of view when passing through the lens is different, and the optical path of the edge field of view is larger, which is beneficial to defocus correction of the aberration of the edge field of view and improves the resolution.

[0079] By setting the first side surface of the fifth lens to be convex and the second side surface of the fifth lens to be concave, it is helpful to converge the light and achieve the large aperture requirement. Optionally, the fifth lens has a positive focal length and has a converging effect on the light. Reasonable setting of the focal length of the fifth lens further deflects the light toward the optical axis and reduces the rear port diameter. Of course, it can also be set that the fifth lens has a negative focal length and has a divergent effect on the light, so that the subsequent optical system has a larger light receiving surface. Reasonable distribution of the focal length is conducive to reducing aberrations and improving optical performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0080] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0081] Figure 1 A cross-sectional view of an optical lens according to Example 1 of the present invention is shown;

[0082] Figure 2 A cross-sectional view of an optical lens according to Example 2 of the present invention is shown;

[0083] Figure 3 A cross-sectional view of an optical lens according to Example 3 of the present invention is shown;

[0084] Figure 4 A cross-sectional view of an optical lens according to Example 4 of the present invention is shown;

[0085] Figure 5 A cross-sectional view of an optical lens according to Example 5 of the present invention is shown;

[0086] Figure 6 A cross-sectional view of an optical lens according to Example 6 of the present invention is shown;

[0087] Figure 7 A cross-sectional view of an optical lens according to Example 7 of the present invention is shown;

[0088] Figure 8 A cross-sectional view of an optical lens according to Example 8 of the present invention is shown.

[0089] The above drawings include the following reference numerals:

[0090] STO, aperture; L1, first lens; S1, first side surface of the first lens; S2, second side surface of the first lens; L2, second lens; S3, first side surface of the second lens; S4, second side surface of the second lens (first side surface of the third lens); L3, third lens; S5, second side surface of the third lens; L4, fourth lens; S6, first side surface of the fourth lens; S7, second side surface of the fourth lens; L5, fifth lens; S9, first side surface of the fifth lens; S10, second side surface of the fifth lens; S11, first side surface of the filter; S12, second side surface of the filter; IMA, imaging surface. DETAILED DESCRIPTION

[0091] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0092] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0093] In the present invention, unless otherwise specified, the directional words used, such as "up, down, top, bottom", usually refer to the directions shown in the drawings, or to the components themselves in the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "inside and outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directional words are not used to limit the present invention.

[0094] It should be noted that in this specification, the expressions of first, second, third, etc. are only used to distinguish one feature from another feature, and do not represent any limitation on the features. Therefore, without departing from the teaching of the present application, the first lens discussed below may also be referred to as the second lens or the third lens.

[0095] In the 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 shown by way of example. That is, the shapes of the spherical or aspherical surfaces are not limited to the shapes of the spherical or aspherical surfaces shown in the drawings. The drawings are for illustration only and are not drawn strictly to scale.

[0096] In this article, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the position of the convex surface 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 position of the concave surface is not defined, it means that the lens surface is concave at least in the paraxial region. The surface of each lens close to the object side is called the first side of the lens, and the surface of each lens close to the image side is called the second side of the lens. The judgment of the surface shape in the paraxial region can be based on the judgment method of the general knowledge in this field, and the positive and negative R value (R refers to the radius of curvature of the paraxial region, usually refers to the R value on the lens database (lens data) in the optical software) is used to judge the concave and convex. For the first side, when the R value is positive, it is judged as a convex surface, and when the R value is negative, it is judged as a concave surface; for the second side, when the R value is positive, it is judged as a concave surface, and when the R value is negative, it is judged as a convex surface.

[0097] This application generally protects an ordinary optical lens. In the accompanying drawings, the left side is the object side and the right side is the image side, that is, the first side is the object side and the second side is the image side.

[0098] In an exemplary embodiment, the optical lens provided by the present application can be used as, for example, a vehicle-mounted lens. Light from the object side can form an image on the image side.

[0099] When the optical lens in the present application is applied to a projection lens or a radar transmitting lens, the left side is the imaging side and the right side is the image source side. In an exemplary embodiment, the optical lens provided in the present application can be used as, for example, a projection lens or a laser radar transmitting end lens. In this case, the image side of the optical lens can be the image source side, and the object side can be the imaging side. Light from the image source side can be imaged on the imaging side. The imaging surface of the optical lens is the image source surface.

[0100] In order to solve at least one of the problems in the prior art that optical lenses are difficult to miniaturize, have poor imaging quality in dark environments, have poor resolution, have serious ghost images, and cannot balance low cost and stability, the present invention provides an optical lens and an electronic device having the same.

[0101] Embodiment 1

[0102] like Figures 1 to 8 As shown, the optical lens includes a first lens, a second lens, a third lens, a fourth lens and a fifth lens, the first lens has positive optical power, the first side surface of the first lens is convex, and the second side surface of the first lens is concave; the second lens has negative optical power, and the first side surface of the second lens and the second side surface of the second lens are both concave; the third lens has positive optical power, and the first side surface of the third lens and the second side surface of the third lens are both convex; the fourth lens has positive optical power, and at least one of the first side surface of the fourth lens and the second side surface of the fourth lens is convex; the fifth lens has optical power, the first side surface of the fifth lens is convex, and the second side surface of the fifth lens is concave.

[0103] By setting the first lens to have positive optical power, light can be converged. By setting the first side surface of the first lens to be convex and the second side surface of the first lens to be concave, the shape of the first lens is close to concentric circles, which is conducive to shrinking the front light and reducing the height at which the light enters the second lens, which is conducive to reducing the front port diameter of the optical lens.

[0104] By setting the second lens to have a negative optical focal length, receiving the light emitted by the first lens and diverging it appropriately, and setting the first side surface of the second lens and the second side surface of the second lens to be concave, it is beneficial for the light to be emitted smoothly and improve the aberration.

[0105] By setting the third lens to have a positive focal length, the light is converged. At the same time, the first side surface of the third lens and the second side surface of the third lens are both convex, so that the light emitted by the second lens is more reasonably converged, and the defocus of the peripheral field of view and the central field of view has a greater adjustment ability, thereby improving the imaging quality.

[0106] By setting the fourth lens to have positive focal power, the light collected at the front end can be compressed and smoothly transitioned to the rear, thereby reducing the sensitivity of the system and reducing the diameter of the rear port of the optical lens, thereby reducing costs.

[0107] Optionally, the first side surface of the fourth lens and the second side surface of the fourth lens are both convex surfaces, which can further converge the light, so that the edge field light is deflected toward the optical axis after passing through the second side surface of the fourth lens, which is beneficial to reducing the rear port diameter of the optical lens.

[0108] Of course, the first side surface of the fourth lens can also be set to be a concave surface, and the second side surface of the fourth lens can be set to be a convex surface. This is beneficial to receiving the light passing through the third lens, the light of each field of view is deflected, the energy loss is small, and the light transition is smooth, which is beneficial to reducing the sensitivity of the lens.

[0109] Of course, it can also be set that the first side surface of the fourth lens is convex, and the second side surface of the fourth lens is concave, that is, the fourth lens is meniscus-shaped, which is conducive to collecting light from a large field of view and improving the light throughput of the optical lens; the second side surface of the fourth lens is concave, and the optical path of the light from the edge field of view and the central field of view when passing through the lens is different, and the optical path of the edge field of view is larger, which is conducive to defocus correction of the aberration of the edge field of view and improves the resolution.

[0110] By setting the first side surface of the fifth lens to be a convex surface and the second side surface of the fifth lens to be a concave surface, it is beneficial to converge the light and achieve the large aperture requirement.

[0111] Optionally, the fifth lens has positive optical power and has a converging effect on light. Reasonable setting of the optical power of the fifth lens further deflects the light toward the optical axis and reduces the rear port diameter.

[0112] Of course, the fifth lens can also be set to have negative optical power, which has a divergent effect on light, so that the subsequent optical system has a larger light receiving surface. Reasonable distribution of optical power is conducive to reducing aberrations and improving optical performance.

[0113] Optionally, the first lens and the fourth lens are both aspherical lenses, and of course, the first lens and the fifth lens can also be aspherical lenses, which is beneficial to correcting system aberrations, improving resolution, and especially reducing large field aberrations.

[0114] In this embodiment, the optical lens further includes an aperture, and optionally, the aperture is located between the fourth lens and the fifth lens, which is beneficial to effectively converge the light entering the optical lens, reduce the lens aperture at the front end of the optical lens, and reduce the assembly sensitivity of the optical lens. Of course, the aperture can also be set between the third lens and the fourth lens.

[0115] In this embodiment, the first side surface of the first lens and the second side surface of the fourth lens have an inflection point, which is beneficial to balancing the aberrations of the central field of view and the edge field of view and improving the resolution.

[0116] In this embodiment, the second lens and the third lens are glued together to form a glued lens. Using a glued lens can reduce the air gap between the two lenses, making the overall structure of the optical lens compact, while reducing the tolerance sensitivity problems such as overall eccentricity generated by the lens during the assembly process, and reducing the light loss caused by reflection between lenses. In addition, the combination of high and low refractive indices is conducive to the rapid transition of the front light, increasing the aperture and improving the amount of light passing. It can also effectively eliminate the influence of ghost images on the optical lens, so that the optical lens can ensure a higher resolution on the basis of eliminating ghost images, reasonably control the material combination of the second lens and the third lens, reduce chromatic aberration, and fully correct various aberrations of the optical lens. Under the premise of compact structure, it can improve resolution, optimize optical properties such as distortion and CRA (chief light angle); in addition, the negative lens in the glued lens has a higher refractive index than the positive lens, so that the light can be effectively and smoothly converged at the end, so that the light reaches the imaging surface smoothly, and the glued surface has a large opening angle, which is conducive to the rapid focusing of peripheral light, improves imaging quality, and reduces overall weight and cost.

[0117] In this embodiment, the focal length value F23 of the cemented lens and the focal length value F of the entire optical lens group satisfy: F23 / F≤8. By limiting F23 / F within a reasonable range, the trend of light entering the cemented lens can be effectively controlled, and the aberration caused by the large-angle light entering through the first lens can be reduced. At the same time, the optical lens structure is made compact, which is conducive to miniaturization. Preferably, F23 / F≤6.

[0118] In this embodiment, the radius of curvature R9 of the first side surface of the fifth lens, the radius of curvature R10 of the second side surface of the fifth lens, and the center thickness d9 of the fifth lens satisfy: 0.5≤R9 / (R10+d9)≤1.5. By limiting R9 / (R10+d9) within a reasonable range, the shape of the fifth lens is close to concentric circles, so that there is an optical path difference between the peripheral light and the central light passing through the fifth lens, the divergent central light enters the rear optical system, and the aperture of the front lens of the lens is reduced, thereby reducing the size of the lens, which is conducive to miniaturization and cost reduction. Preferably, 0.6≤R9 / (R10+d9)≤1.3.

[0119] In this embodiment, the air interval d5 between the third lens and the fourth lens and the total optical length TTL of the optical lens satisfy: d5 / TTL≤0.15. By limiting d5 / TTL within a reasonable range and reasonably setting the air interval between the third lens and the fourth lens, it is beneficial to compact the overall structure of the optical lens and achieve miniaturization. Preferably, d5 / TTL≤0.1.

[0120] In this embodiment, the center thickness d4 of the third lens and the total optical length TTL of the optical lens satisfy: 0.1≤d4 / TTL. By limiting d4 / TTL within a reasonable range and reasonably setting the center thickness of the third lens, it is beneficial to compact the overall structure of the optical lens and achieve miniaturization. Preferably, 0.2≤d4 / TTL.

[0121] In this embodiment, the optical back focus BFL of the optical lens and the optical total length TTL of the optical lens satisfy: 0.09≤BFL / TTL. By limiting BFL / TTL within a reasonable range, it is helpful to meet the special requirements of the back focus length of the optical lens, and it can also reserve space for the installation and focusing of optical elements to avoid mechanical interference. Preferably, 0.13≤BFL / TTL.

[0122] In this embodiment, the total optical length TTL of the optical lens, the image height H corresponding to the maximum field angle of the optical lens, and the arc value θ of the maximum field angle of the optical lens satisfy: TTL / H / θ≤20. By limiting TTL / H / θ within a reasonable range, it is helpful to ensure a shorter total optical length under the same imaging plane, and the miniaturization of the lens can be achieved. Preferably, TTL / H / θ≤18.

[0123] In this embodiment, the focal length value F of the optical lens and the entrance pupil diameter ENPD of the optical lens satisfy: F / ENPD≤1.5. By limiting F / ENPD within a reasonable range, the entrance pupil diameter can be controlled to be larger, which is conducive to increasing the amount of light passing and achieving a small FNO. Preferably, F / ENPD≤1.1.

[0124] In this embodiment, the focal length value F of the entire optical lens, the entrance pupil diameter ENPD of the optical lens, and the maximum aperture D of the first side surface of the first lens corresponding to the maximum field angle of the optical lens satisfy: F / ENPD / D≤0.1. By limiting F / ENPD / D within a reasonable range, the optical lens is ensured to have a small aperture while meeting the high light throughput, which is conducive to miniaturization of the lens. Preferably, F / ENPD / D≤0.08.

[0125] In this embodiment, the radius of curvature R1 of the first side surface of the first lens and the focal length F of the entire optical lens group satisfy: 0.8≤R1 / F≤2. By limiting R1 / F within a reasonable range, it is beneficial to reasonably allocate the focal length of the first lens, help balance various aberrations, and achieve high resolution. Preferably, 1≤R1 / F≤1.6.

[0126] In this embodiment, the focal length value F4 of the fourth lens and the focal length value F of the entire optical lens group satisfy: 0.8≤F4 / F≤4. By limiting F4 / F within a reasonable range, the focal length of the fourth lens can be reasonably allocated, which is conducive to the entry of light with a large field angle into the optical system. Preferably, 1≤F4 / F≤3.5.

[0127] In this embodiment, the focal length value F of the entire optical lens, the arc value θ of the maximum field angle of the optical lens, and the maximum light aperture D of the first side surface of the first lens corresponding to the maximum field angle of the optical lens satisfy: 0.2≤(F*θ) / D. By limiting (F*θ) / D within a reasonable range, the front port diameter of the lens can be made smaller and the volume of the optical lens can be reduced. Preferably, 0.3≤(F*θ) / D.

[0128] In this embodiment, the Abbe number VD2 of the second lens and the Abbe number VD3 of the third lens satisfy: 80≤VD2+VD3. By limiting VD2+VD3 to a reasonable range, the material combination of the second lens and the third lens can be reasonably set, which is helpful to correct chromatic aberration and improve resolution. Preferably, 90≤VD2+VD3.

[0129] In this embodiment, the maximum aperture D of the first side surface of the first lens corresponding to the maximum field angle of the optical lens, the image height H corresponding to the maximum field angle of the optical lens, and the focal length value F of the entire set of the optical lens satisfy: 0.06≤D / H / F. By limiting D / H / F within a reasonable range, under the condition of a fixed focal length, the optical lens can be provided with the characteristics of a large target surface and a small aperture. Preferably, 0.1≤D / H / F.

[0130] In this embodiment, the image height H corresponding to the maximum field angle of the optical lens and the focal length value F of the entire optical lens group satisfy: 1.2≤F / H≤3.8. By limiting F / H within a reasonable range, it is beneficial to improve the resolution. Preferably, 1.7≤F / H≤2.9.

[0131] In this embodiment, the clear aperture D9 of the first side surface of the fifth lens, the optical back focus BFL of the optical lens, and the image height H corresponding to the maximum field angle of the optical lens satisfy: 7.2≤D9*BFL / H. By limiting D9*BFL / H to a reasonable range, the back focus is long at the same imaging plane and the same image height, which is conducive to achieving a small CRA. Preferably, 8≤D9*BFL / H.

[0132] In this embodiment, the clear aperture D10 of the second side surface of the fifth lens, the optical back focus BFL of the optical lens, and the image height H corresponding to the maximum field angle of the optical lens satisfy: 5.5≤D10*BFL / H≤15. By limiting D10*BFL / H to a reasonable range, the back focus is long at the same imaging plane and the same image height, which is conducive to achieving a small CRA. Preferably, 6.8≤D10*BFL / H≤13.

[0133] In this embodiment, the radius of curvature R1 of the first side surface of the first lens, the radius of curvature R2 of the second side surface of the first lens, and the center thickness d1 of the first lens satisfy: 0.49≤R1 / (R2+d1)≤1.5. By limiting R1 / (R2+d1) within a reasonable range, the first lens is a special setting with a shape close to concentric circles, so that there is an optical path difference between the peripheral light and the central light, and the central light is diverged and enters the rear optical system, which is conducive to achieving high resolution. Preferably, 0.6≤R1 / (R2+d1)≤1.

[0134] In this embodiment, the focal length value F3 of the third lens and the focal length value F4 of the fourth lens satisfy: 0.1≤F3 / F4≤1. By limiting F3 / F4 within a reasonable range, the focal lengths of two adjacent lenses are close, which helps to smoothly transition the light and improve the image quality. Preferably, 0.2≤F3 / F4≤0.8.

[0135] In this embodiment, the focal length value F5 of the fifth lens and the focal length value F of the entire optical lens group satisfy: -11≤F5 / F≤150. By limiting F5 / F within a reasonable range, the fifth lens, which is also the last lens, has a short focal length, which helps to collect light and ensure the amount of light passing. Preferably, -9≤F5 / F≤110.

[0136] In this embodiment, the vector height SAG(S4) of the first side surface of the third lens and the clear aperture D4 of the first side surface of the third lens satisfy: -0.3≤arctan(SAG(S4) / D4). By limiting arctan(SAG(S4) / D4) within a reasonable range, the bonding surface angle is larger, which is conducive to rapid focusing of peripheral light and improved imaging quality. Preferably, -0.2≤arctan(SAG(S4) / D4).

[0137] In this embodiment, the center thickness d6 of the fourth lens and the total optical length TTL of the optical lens satisfy: 0.07≤d6 / TTL. By limiting d6 / TTL within a reasonable range, the center thickness of the fourth lens is controlled to be larger, which is beneficial to reduce the reflection of the lens and achieve the effect of no ghost image; at the same time, it is beneficial to reduce the diameter of the rear port and make the light transition smoothly to ensure the imaging quality. Preferably, 0.09≤d6 / TTL.

[0138] Embodiment 2

[0139] like Figures 1 to 8 As shown, the optical lens includes a first lens, a second lens, a third lens, a fourth lens and a fifth lens, the first lens has positive focal power; the second lens has negative focal power; the third lens has positive focal power; the fourth lens has positive focal power; the fifth lens has optical focal power; wherein the combined focal length value F23 of the second lens and the third lens and the entire group focal length value F of the optical lens satisfy: F23 / F≤8.

[0140] By setting the first lens to have a positive focal power, the light can be converged. By setting the second lens to have a negative focal power, the light emitted by the first lens is received and appropriately diverged. By setting the third lens to have a positive focal power, the light can be converged. By setting the fourth lens to have a positive focal power, the light collected at the front end can be compressed and the light can be smoothly transitioned to the rear, reducing the sensitivity of the system, while reducing the diameter of the rear port of the optical lens and reducing costs. Optionally, the fifth lens has a positive focal power and has a converging effect on the light. Reasonable setting of the focal power of the fifth lens further deflects the light in the direction of the optical axis and reduces the diameter of the rear port. Of course, the fifth lens can also be set to have a negative focal power, which has a divergent effect on the light, so that the subsequent optical system has a larger light receiving surface. Reasonable distribution of focal power is conducive to reducing aberrations and improving optical performance.

[0141] The use of cemented lenses can reduce the air gap between the two lenses, making the overall structure of the optical lens compact, while reducing tolerance sensitivity issues such as overall eccentricity generated during the assembly process of the lens, and reducing light loss caused by reflection between lenses. The combination of high and low refractive indices is conducive to the rapid transition of the front light, increasing the aperture and improving the amount of light passing. It can also effectively eliminate the influence of ghost images on the optical lens, so that the optical lens can ensure a higher resolution on the basis of eliminating ghost images, reasonably control the material combination of the second lens and the third lens, reduce chromatic aberration, and fully correct various aberrations of the optical lens. Under the premise of compact structure, it can improve resolution, optimize optical properties such as distortion and CRA (chief light angle); in addition, the negative lens in the cemented lens has a higher refractive index than the positive lens, so that the light can be effectively and smoothly converged at the end, so that the light reaches the imaging surface smoothly, and the cemented surface has a large opening angle, which is conducive to the rapid focusing of peripheral light, improving imaging quality, and reducing overall weight and cost. By limiting F23 / F within a reasonable range, the trend of light entering the cemented lens can be effectively controlled, reducing the aberration caused by the large-angle light entering through the first lens, while making the optical lens structure compact and conducive to miniaturization. Preferably, F23 / F≤6.

[0142] By setting the first side surface of the first lens to be convex and the second side surface of the first lens to be concave, the shape of the first lens is close to a concentric circle, which is conducive to shrinking the front light, so that the height of the light entering the second lens is reduced, which is conducive to reducing the front port diameter of the optical lens. By setting the first side surface of the second lens and the second side surface of the second lens to be concave, it is conducive to smooth emission of light and improved aberration. By setting the first side surface of the third lens and the second side surface of the third lens to be convex, the light emitted by the second lens is more reasonably converged, and the defocus of the peripheral field of view and the central field of view has a greater adjustment ability, thereby improving the imaging quality.

[0143] Optionally, the first side of the fourth lens and the second side of the fourth lens are both convex. It is possible to further converge the light, so that the edge field of view light is deflected in the direction of the optical axis after passing through the second side of the fourth lens, which is beneficial to reducing the diameter of the rear port of the optical lens. Of course, it can also be set that the first side of the fourth lens is concave and the second side of the fourth lens is convex. It is beneficial to receive the light passing through the third lens, the light of each field of view is deflected, the energy loss is small, and the light transition is smooth, which is beneficial to reduce the sensitivity of the lens. Of course, it can also be set that the first side of the fourth lens is convex and the second side of the fourth lens is concave, that is, the fourth lens is meniscus-shaped, which is beneficial to collect large field of view light and improve the light throughput of the optical lens; the second side of the fourth lens is concave, the edge field of view and the center field of view light have different optical paths when passing through the lens, and the edge field of view optical path is larger, which is beneficial to defocus correction of the aberration of the edge field of view and improve the resolution. By setting the first side of the fifth lens to be convex and the second side of the fifth lens to be concave, it is beneficial to converge the light and achieve the large aperture requirement.

[0144] Optionally, the first lens and the fourth lens are both aspherical lenses, and of course, the first lens and the fifth lens can also be aspherical lenses, which is beneficial to correcting system aberrations, improving resolution, and especially reducing large field aberrations.

[0145] In this embodiment, the optical lens further includes an aperture, and optionally, the aperture is located between the fourth lens and the fifth lens, which is beneficial to effectively converge the light entering the optical lens, reduce the lens aperture at the front end of the optical lens, and reduce the assembly sensitivity of the optical lens. Of course, the aperture can also be set between the third lens and the fourth lens.

[0146] In this embodiment, the first side surface of the first lens and the second side surface of the fourth lens have an inflection point, which is beneficial to balancing the aberrations of the central field of view and the edge field of view and improving the resolution.

[0147] In this embodiment, the second lens and the third lens are glued together to form a glued lens. Using a glued lens can reduce the air gap between the two lenses, making the overall structure of the optical lens compact, while reducing the tolerance sensitivity problems such as overall eccentricity generated by the lens during the assembly process, and reducing the light loss caused by reflection between lenses. In addition, the combination of high and low refractive indices is conducive to the rapid transition of the front light, increasing the aperture and improving the amount of light passing. It can also effectively eliminate the influence of ghost images on the optical lens, so that the optical lens can ensure a higher resolution on the basis of eliminating ghost images, reasonably control the material combination of the second lens and the third lens, reduce chromatic aberration, and fully correct various aberrations of the optical lens. Under the premise of compact structure, it can improve resolution, optimize optical properties such as distortion and CRA (chief light angle); in addition, the negative lens in the glued lens has a higher refractive index than the positive lens, so that the light can be effectively and smoothly converged at the end, so that the light reaches the imaging surface smoothly, and the glued surface has a large opening angle, which is conducive to the rapid focusing of peripheral light, improves imaging quality, and reduces overall weight and cost.

[0148] In this embodiment, the radius of curvature R9 of the first side surface of the fifth lens, the radius of curvature R10 of the second side surface of the fifth lens, and the center thickness d9 of the fifth lens satisfy: 0.5≤R9 / (R10+d9)≤1.5. By limiting R9 / (R10+d9) within a reasonable range, the shape of the fifth lens is close to concentric circles, so that there is an optical path difference between the peripheral light and the central light passing through the fifth lens, the divergent central light enters the rear optical system, and the aperture of the front lens of the lens is reduced, thereby reducing the size of the lens, which is conducive to miniaturization and cost reduction. Preferably, 0.6≤R9 / (R10+d9)≤1.3.

[0149] In this embodiment, the air interval d5 between the third lens and the fourth lens and the total optical length TTL of the optical lens satisfy: d5 / TTL≤0.15. By limiting d5 / TTL within a reasonable range and reasonably setting the air interval between the third lens and the fourth lens, it is beneficial to compact the overall structure of the optical lens and achieve miniaturization. Preferably, d5 / TTL≤0.1.

[0150] In this embodiment, the center thickness d4 of the third lens and the total optical length TTL of the optical lens satisfy: 0.1≤d4 / TTL. By limiting d4 / TTL within a reasonable range and reasonably setting the center thickness of the third lens, it is beneficial to compact the overall structure of the optical lens and achieve miniaturization. Preferably, 0.2≤d4 / TTL.

[0151] In this embodiment, the optical back focus BFL of the optical lens and the optical total length TTL of the optical lens satisfy: 0.09≤BFL / TTL. By limiting BFL / TTL within a reasonable range, it is helpful to meet the special requirements of the back focus length of the optical lens, and it can also reserve space for the installation and focusing of optical elements to avoid mechanical interference. Preferably, 0.13≤BFL / TTL.

[0152] In this embodiment, the total optical length TTL of the optical lens, the image height H corresponding to the maximum field angle of the optical lens, and the arc value θ of the maximum field angle of the optical lens satisfy: TTL / H / θ≤20. By limiting TTL / H / θ within a reasonable range, it is beneficial to ensure a shorter total optical length under the same imaging plane, and the miniaturization of the lens can be achieved. Preferably, TTL / H / θ≤18.

[0153] In this embodiment, the focal length value F of the entire optical lens and the entrance pupil diameter ENPD of the optical lens satisfy: F / ENPD≤1.5. By limiting F / ENPD within a reasonable range, the entrance pupil diameter can be controlled to be larger, which is conducive to increasing the amount of light passing and achieving a small FNO. Preferably, F / ENPD≤1.1.

[0154] In this embodiment, the focal length value F of the entire optical lens, the entrance pupil diameter ENPD of the optical lens, and the maximum aperture D of the first side surface of the first lens corresponding to the maximum field angle of the optical lens satisfy: F / ENPD / D≤0.1. By limiting F / ENPD / D within a reasonable range, the optical lens is ensured to have a small aperture while meeting the high light throughput, which is conducive to miniaturization of the lens. Preferably, F / ENPD / D≤0.08.

[0155] In this embodiment, the radius of curvature R1 of the first side surface of the first lens and the focal length F of the entire optical lens group satisfy: 0.8≤R1 / F≤2. By limiting R1 / F within a reasonable range, it is beneficial to reasonably allocate the focal length of the first lens, help balance various aberrations, and achieve high resolution. Preferably, 1≤R1 / F≤1.6.

[0156] In this embodiment, the focal length value F4 of the fourth lens and the focal length value F of the entire optical lens group satisfy: 0.8≤F4 / F≤4. By limiting F4 / F within a reasonable range, the focal length of the fourth lens can be reasonably allocated, which is conducive to the entry of light with a large field angle into the optical system. Preferably, 1≤F4 / F≤3.5.

[0157] In this embodiment, the focal length value F of the entire optical lens, the arc value θ of the maximum field angle of the optical lens, and the maximum light aperture D of the first side surface of the first lens corresponding to the maximum field angle of the optical lens satisfy: 0.2≤(F*θ) / D. By limiting (F*θ) / D within a reasonable range, the front port diameter of the lens can be made smaller and the volume of the optical lens can be reduced. Preferably, 0.3≤(F*θ) / D.

[0158] In this embodiment, the Abbe number VD2 of the second lens and the Abbe number VD3 of the third lens satisfy: 80≤VD2+VD3. By limiting VD2+VD3 to a reasonable range, the material combination of the second lens and the third lens can be reasonably set, which is helpful to correct chromatic aberration and improve resolution. Preferably, 90≤VD2+VD3.

[0159] In this embodiment, the maximum aperture D of the first side surface of the first lens corresponding to the maximum field angle of the optical lens, the image height H corresponding to the maximum field angle of the optical lens, and the focal length value F of the entire set of the optical lens satisfy: 0.06≤D / H / F. By limiting D / H / F within a reasonable range, under the condition of a fixed focal length, the optical lens can be provided with the characteristics of a large target surface and a small aperture. Preferably, 0.1≤D / H / F.

[0160] In this embodiment, the image height H corresponding to the maximum field angle of the optical lens and the focal length value F of the entire optical lens group satisfy: 1.2≤F / H≤3.8. By limiting F / H within a reasonable range, it is beneficial to improve the resolution. Preferably, 1.7≤F / H≤2.9.

[0161] In this embodiment, the clear aperture D9 of the first side surface of the fifth lens, the optical back focus BFL of the optical lens, and the image height H corresponding to the maximum field angle of the optical lens satisfy: 7.2≤D9*BFL / H. By limiting D9*BFL / H to a reasonable range, the back focus is long at the same imaging plane and the same image height, which is conducive to achieving a small CRA. Preferably, 8≤D9*BFL / H.

[0162] In this embodiment, the clear aperture D10 of the second side surface of the fifth lens, the optical back focus BFL of the optical lens, and the image height H corresponding to the maximum field angle of the optical lens satisfy: 5.5≤D10*BFL / H≤15. By limiting D10*BFL / H to a reasonable range, the back focus is long at the same imaging plane and the same image height, which is conducive to achieving a small CRA. Preferably, 6.8≤D10*BFL / H≤13.

[0163] In this embodiment, the radius of curvature R1 of the first side surface of the first lens, the radius of curvature R2 of the second side surface of the first lens, and the center thickness d1 of the first lens satisfy: 0.49≤R1 / (R2+d1)≤1.5. By limiting R1 / (R2+d1) within a reasonable range, the first lens is a special setting with a shape close to concentric circles, so that there is an optical path difference between the peripheral light and the central light, and the central light is diverged and enters the rear optical system, which is conducive to achieving high resolution. Preferably, 0.6≤R1 / (R2+d1)≤1.

[0164] In this embodiment, the focal length value F3 of the third lens and the focal length value F4 of the fourth lens satisfy: 0.1≤F3 / F4≤1. By limiting F3 / F4 within a reasonable range, the focal lengths of two adjacent lenses are close, which helps to smoothly transition the light and improve the image quality. Preferably, 0.2≤F3 / F4≤0.8.

[0165] In this embodiment, the focal length value F5 of the fifth lens and the focal length value F of the entire optical lens group satisfy: -11≤F5 / F≤150. By limiting F5 / F within a reasonable range, the fifth lens, which is also the last lens, has a short focal length, which helps to collect light and ensure the amount of light passing. Preferably, -9≤F5 / F≤110.

[0166] In this embodiment, the vector height SAG(S4) of the first side surface of the third lens and the clear aperture D4 of the first side surface of the third lens satisfy: -0.3≤arctan(SAG(S4) / D4). By limiting arctan(SAG(S4) / D4) within a reasonable range, the bonding surface angle is larger, which is conducive to rapid focusing of peripheral light and improved imaging quality. Preferably, -0.2≤arctan(SAG(S4) / D4).

[0167] In this embodiment, the center thickness d6 of the fourth lens and the total optical length TTL of the optical lens satisfy: 0.07≤d6 / TTL. By limiting d6 / TTL within a reasonable range, the center thickness of the fourth lens is controlled to be larger, which is beneficial to reduce the reflection of the lens and achieve the effect of no ghost image; at the same time, it is beneficial to reduce the diameter of the rear port and make the light transition smoothly to ensure the imaging quality. Preferably, 0.09≤d6 / TTL.

[0168] It should be noted that the total length TTL of the optical lens is the distance from the first side surface of the first lens to the imaging surface of the optical lens, and the optical back focus BFL is the distance from the last lens to the imaging surface of the optical lens.

[0169] Optionally, the optical lens may further include a filter for correcting color deviation and a protective glass for protecting a photosensitive element located on the imaging surface.

[0170] The optical lens in the present application may use multiple lenses, such as the five lenses mentioned above. In the present application, at least one of the mirror surfaces of each 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. Unlike 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 during imaging can be eliminated as much as possible, thereby improving the imaging quality. Specifically, when focusing on the imaging quality of the optical lens, the first lens to the fifth lens can all use aspherical lenses.

[0171] In an exemplary embodiment, the first lens to the fifth lens may all be glass lenses. An optical lens made of glass can suppress the deviation of the back focus of the optical lens with temperature changes to improve the stability of the system. At the same time, the use of glass material can avoid lens imaging blur caused by high and low temperature changes in the use environment, which affects the normal use of the lens. For example, the temperature range of the optical lens with an all-glass design is relatively wide, and stable optical performance can be maintained in the range of -40°C to 105°C. Specifically, when focusing on resolution quality and reliability, the first lens to the fifth lens may all be glass aspherical lenses. Of course, in applications where temperature stability requirements are lower, the first lens to the fifth lens in the optical lens may also be made of plastic. Using plastic to make optical lenses can effectively reduce production costs. Of course, the first lens to the fifth lens in the optical lens may also be made of a combination of plastic and glass.

[0172] The present application also provides an electronic device, comprising the above-mentioned optical lens and an imaging element for converting an optical image formed by the optical lens into an electrical signal. The imaging element may be a charge coupled device (CCD) or a complementary metal oxide semiconductor (CMOS). The electronic device may be an independent imaging device such as a digital camera, or an imaging module integrated in a mobile electronic device such as a mobile phone. The electronic device is equipped with the above-described optical lens.

[0173] However, those skilled in the art should understand that, without departing from the technical solution claimed in the present application, the number of lenses constituting the optical lens can be changed to obtain the various results and advantages described in this specification. For example, although five lenses are described as an example in the embodiment, the optical lens is not limited to including five lenses. If necessary, the optical lens may also include other numbers of lenses.

[0174] The following further describes examples of specific surface shapes and parameters of the optical lens applicable to the above-mentioned embodiments with reference to the accompanying drawings.

[0175] Example 1

[0176] like Figure 1 As shown, the optical lens includes, from the object side to the image side, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, an aperture STO, a fifth lens L5, a filter and an imaging surface IMA.

[0177] The first lens L1 has positive power, the first side surface S1 of the first lens is convex, and the second side surface S2 of the first lens is concave. The second lens L2 has negative power, the first side surface S3 of the second lens is concave, and the second side surface S4 of the second lens is concave. The third lens L3 has positive power, the first side surface S4 of the third lens is convex, and the second side surface S5 of the third lens is convex. The fourth lens L4 has positive power, the first side surface S6 of the fourth lens is convex, and the second side surface S7 of the fourth lens is convex. The fifth lens L5 has positive power, the first side surface S9 of the fifth lens is convex, and the second side surface S10 of the fifth lens is concave. The filter has a first side surface S11 of the filter and a second side surface S12 of the filter. Light from the object passes through each surface S1 to S12 in sequence and is finally imaged on the imaging surface IMA.

[0178] In this example, the focal length F of the optical lens is 13.5189 mm, the total length TTL of the optical lens is 41.8026 mm, and the maximum field of view FOV of the optical lens is 25.0200°.

[0179] In this example, the second lens and the third lens are cemented lenses, so the second side surface of the second lens and the first side surface of the third lens are both S4, but for the first side surface and the second side surface, when the radius of curvature is the same, the surface shapes of the two are different, so the second side surface S4 of the second lens is concave, and the first side surface S4 of the third lens is convex.

[0180] Table 1 shows the basic structural parameters of the optical lens of Example 1, wherein the units of the radius of curvature and the thickness / distance are all millimeters (mm). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity means infinity.

[0181] Surf Radius Thickness Nd Vd 1 19.9254 3.9879 1.69 53.15 2 20.0463 4.0829 3 -18.4519 0.5000 1.62 36.35 4 18.1122 10.7834 1.62 63.41 5 -15.7240 3.6376 6 12.7953 10.1386 1.59 61.25 7 -300.0283 1.8851 STO Infinity -1.7090 9 4.8501 1.5444 1.69 31.08 10 4.2697 2.9082 11 Infinity 1.0609 1.52 54.09 12 Infinity 2.9825 IMA / /

[0182] Table 1

[0183] In this example, the first lens and the fifth lens are both aspheric lenses. The surface shape of each aspheric lens can be defined by but not limited to the following aspheric formula:

[0184]

[0185] Wherein, x is the distance vector height from the vertex of the aspheric surface when the aspheric surface is 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 cone coefficient; and A is the high-order coefficient. Table 2 below shows the cone coefficient k and the high-order coefficients A (4th-order coefficient), B (6th-order coefficient), C (8th-order coefficient), D (10th-order coefficient), E (12th-order coefficient), F (14th-order coefficient), and G (16th-order coefficient) that can be used for the surface of the aspheric lens in this example.

[0186] Surf K A B C D E F G 1 0.2527 -8.7814E-05 -3.5616E-07 3.7668E-09 -1.0251E-10 2.5935E-13 1.4389E-22 0.0000E+00 2 1.8846 -1.1946E-04 8.3253E-07 -1.5964E-08 1.0602E-10 -1.0211E-12 1.9635E-27 0.0000E+00 9 -0.7717 5.0890E-04 1.7764E-05 -1.3850E-07 -6.1996E-08 -3.9225E-09 2.2464E-10 0.0000E+00 10 -0.5417 4.7809E-04 1.2628E-04 -1.7260E-05 1.1740E-07 5.5137E-08 -2.2891E-09 0.0000E+00

[0187] Table 2

[0188] Example 2

[0189] like Figure 2 As shown, the optical lens includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, an aperture STO, a fifth lens L5, a filter and an imaging surface IMA from the object side to the image side. For the sake of brevity, some descriptions similar to those in Example 1 will be omitted.

[0190] The first lens L1 has positive power, the first side surface S1 of the first lens is convex, and the second side surface S2 of the first lens is concave. The second lens L2 has negative power, the first side surface S3 of the second lens is concave, and the second side surface S4 of the second lens is concave. The third lens L3 has positive power, the first side surface S4 of the third lens is convex, and the second side surface S5 of the third lens is convex. The fourth lens L4 has positive power, the first side surface S6 of the fourth lens is convex, and the second side surface S7 of the fourth lens is convex. The fifth lens L5 has positive power, the first side surface S9 of the fifth lens is convex, and the second side surface S10 of the fifth lens is concave. The filter has a first side surface S11 of the filter and a second side surface S12 of the filter. Light from the object passes through each surface S1 to S12 in sequence and is finally imaged on the imaging surface IMA.

[0191] In this example, the focal length F of the optical lens is 13.5449 mm, the total length TTL of the optical lens is 42.0514 mm, and the maximum field of view FOV of the optical lens is 25.0200°.

[0192] In this example, the second lens and the third lens are cemented lenses, so the second side surface of the second lens and the first side surface of the third lens are both S4, but for the first side surface and the second side surface, when the radius of curvature is the same, the surface shapes of the two are different, so the second side surface S4 of the second lens is concave, and the first side surface S4 of the third lens is convex.

[0193] Table 3 shows the basic structural parameters of the optical lens of Example 2, where the units of the radius of curvature and the thickness / distance are all millimeters (mm). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity means infinity.

[0194]

[0195]

[0196] Table 3

[0197] In this example, both the first lens and the fifth lens are aspherical lenses.

[0198] Table 4 shows the conic coefficient k and the coefficients of the higher-order terms that can be used for the surface of the aspheric lens in this example. The surface shape of each aspheric lens can be defined by, but not limited to, the formula (1) in Example 1.

[0199] Surf K A B C D E F G 1 0.2527 -8.7814E-05 -3.5615E-07 3.7668E-09 -1.0251E-10 2.5935E-13 1.4389E-22 0.0000E+00 2 1.8846 -1.1946E-04 8.3253E-07 -1.5964E-08 1.0602E-10 -1.0211E-12 1.9081E-27 0.0000E+00 9 -0.7769 5.0140E-04 1.7248E-05 -1.6243E-07 -6.3252E-08 -3.9764E-09 1.1138E-10 0.0000E+00 10 -0.5422 4.7907E-04 1.2580E-04 -1.7325E-05 1.1276E-07 5.4711E-08 -1.1589E-09 0.0000E+00

[0200] Table 4

[0201] Example 3

[0202] like Figure 3 As shown, the optical lens includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, an aperture STO, a fifth lens L5, a filter and an imaging surface IMA from the object side to the image side. For the sake of brevity, some descriptions similar to those in Example 1 will be omitted.

[0203] The first lens L1 has positive power, the first side surface S1 of the first lens is convex, and the second side surface S2 of the first lens is concave. The second lens L2 has negative power, the first side surface S3 of the second lens is concave, and the second side surface S4 of the second lens is concave. The third lens L3 has positive power, the first side surface S4 of the third lens is convex, and the second side surface S5 of the third lens is convex. The fourth lens L4 has positive power, the first side surface S6 of the fourth lens is concave, and the second side surface S7 of the fourth lens is convex. The fifth lens L5 has positive power, the first side surface S9 of the fifth lens is convex, and the second side surface S10 of the fifth lens is concave. The filter has a first side surface S11 of the filter and a second side surface S12 of the filter. Light from an object passes through each surface S1 to S12 in sequence and is finally imaged on an imaging surface IMA.

[0204] In this example, the focal length F of the optical lens is 13.7197 mm, the total length TTL of the optical lens is 37.5923 mm, and the maximum field of view FOV of the optical lens is 25.0200°.

[0205] In this example, the second lens and the third lens are cemented lenses, so the second side surface of the second lens and the first side surface of the third lens are both S4, but for the first side surface and the second side surface, when the radius of curvature is the same, the surface shapes of the two are different, so the second side surface S4 of the second lens is concave, and the first side surface S4 of the third lens is convex.

[0206] Table 5 shows the basic structural parameters of the optical lens of Example 3, where the units of the radius of curvature and the thickness / distance are all millimeters (mm). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity means infinity.

[0207]

[0208]

[0209] Table 5

[0210] In this example, both the first lens and the fourth lens are aspherical lenses.

[0211] Table 6 shows the conic coefficient k and the coefficients of the higher-order terms that can be used for the surface of the aspheric lens in this example. The surface shape of each aspheric lens can be defined by, but not limited to, the formula (1) in Example 1.

[0212] Surf K A B C D E F G 1 -0.2570 -8.4429E-05 -1.5083E-06 1.2966E-08 -1.5378E-10 1.8378E-12 -2.1585E-14 0.0000E+00 2 0.8640 -1.8765E-04 1.0992E-06 -5.2647E-08 7.4218E-10 -1.2909E-12 -5.7372E-14 0.0000E+00 6 200.0000 -3.1405E-05 -6.5299E-07 1.1340E-08 3.9229E-10 -4.4690E-12 -1.7082E-14 0.0000E+00 7 1.7554 -9.1180E-07 1.7794E-06 5.6950E-10 -1.5278E-11 7.6787E-14 -8.7982E-14 0.0000E+00

[0213] Table 6

[0214] Example 4

[0215] like Figure 4 As shown, the optical lens includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, an aperture STO, a fifth lens L5, a filter and an imaging surface IMA from the object side to the image side. For the sake of brevity, some descriptions similar to those in Example 1 will be omitted.

[0216] The first lens L1 has positive power, the first side surface S1 of the first lens is convex, and the second side surface S2 of the first lens is concave. The second lens L2 has negative power, the first side surface S3 of the second lens is concave, and the second side surface S4 of the second lens is concave. The third lens L3 has positive power, the first side surface S4 of the third lens is convex, and the second side surface S5 of the third lens is convex. The fourth lens L4 has positive power, the first side surface S6 of the fourth lens is concave, and the second side surface S7 of the fourth lens is convex. The fifth lens L5 has positive power, the first side surface S9 of the fifth lens is convex, and the second side surface S10 of the fifth lens is concave. The filter has a first side surface S11 of the filter and a second side surface S12 of the filter. Light from an object passes through each surface S1 to S12 in sequence and is finally imaged on an imaging surface IMA.

[0217] In this example, the focal length F of the optical lens is 13.7768 mm, the total length TTL of the optical lens is 38.3304 mm, and the maximum field of view FOV of the optical lens is 25.0200°.

[0218] In this example, the second lens and the third lens are cemented lenses, so the second side surface of the second lens and the first side surface of the third lens are both S4, but for the first side surface and the second side surface, when the radius of curvature is the same, the surface shapes of the two are different, so the second side surface S4 of the second lens is concave, and the first side surface S4 of the third lens is convex.

[0219] Table 7 shows the basic structural parameters of the optical lens of Example 4, where the units of the radius of curvature and the thickness / distance are all millimeters (mm). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity means infinity.

[0220] Surf Radius Thickness Nd Vd 1 15.5171 4.5363 1.69 53.15 2 14.4576 2.2055 3 -51.5922 1.6250 1.62 36.35 4 9.1576 12.7494 1.62 63.41 5 -15.8491 0.2605 6 -334.9970 5.0398 1.59 61.16 7 -21.1430 1.9643 STO Infinity -1.8228 9 6.7617 4.4847 1.69 54.57 10 5.2378 2.9082 11 Infinity 1.0609 1.52 54.09 12 Infinity 3.3186 IMA / /

[0221] Table 7

[0222] In this example, both the first lens and the fourth lens are aspherical lenses.

[0223] Table 8 shows the conic coefficient k and the coefficients of the higher-order terms that can be used for the surface of the aspheric lens in this example. The surface shape of each aspheric lens can be defined by, but not limited to, the formula (1) in Example 1.

[0224] Surf K A B C D E F G 1 -0.2560 -8.4412E-05 -1.5063E-06 1.2980E-08 -1.5370E-10 1.8372E-12 -2.1572E-14 0.0000E+00 2 0.8628 -1.8770E-04 1.0967E-06 -5.2672E-08 7.4202E-10 -1.2925E-12 -5.7445E-14 0.0000E+00 6 2798.5000 -3.1507E-05 -6.4996E-07 1.1381E-08 3.9229E-10 -4.4832E-12 -1.7574E-14 0.0000E+00 7 1.7519 -7.3486E-07 1.7761E-06 4.7595E-10 -1.6778E-11 6.7899E-14 -8.7888E-14 0.0000E+00

[0225] Table 8

[0226] Example 5

[0227] like Figure 5As shown, the optical lens includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, an aperture STO, a fifth lens L5, a filter and an imaging surface IMA from the object side to the image side. For the sake of brevity, some descriptions similar to those in Example 1 will be omitted.

[0228] The first lens L1 has positive power, the first side surface S1 of the first lens is convex, and the second side surface S2 of the first lens is concave. The second lens L2 has negative power, the first side surface S3 of the second lens is concave, and the second side surface S4 of the second lens is concave. The third lens L3 has positive power, the first side surface S4 of the third lens is convex, and the second side surface S5 of the third lens is convex. The fourth lens L4 has positive power, the first side surface S6 of the fourth lens is convex, and the second side surface S7 of the fourth lens is concave. The fifth lens L5 has negative power, the first side surface S9 of the fifth lens is convex, and the second side surface S10 of the fifth lens is concave. The filter has a first side surface S11 of the filter and a second side surface S12 of the filter. Light from the object passes through each surface S1 to S12 in sequence and is finally imaged on the imaging surface IMA.

[0229] In this example, the focal length F of the optical lens is 14.6995 mm, the total length TTL of the optical lens is 39.3595 mm, and the maximum field of view FOV of the optical lens is 25.0200°.

[0230] In this example, the second lens and the third lens are cemented lenses, so the second side surface of the second lens and the first side surface of the third lens are both S4, but for the first side surface and the second side surface, when the radius of curvature is the same, the surface shapes of the two are different, so the second side surface S4 of the second lens is concave, and the first side surface S4 of the third lens is convex.

[0231] In this example, the first side surface of the first lens and the second side surface of the fourth lens have an inflection point.

[0232] Table 9 shows the basic structural parameters of the optical lens of Example 5, where the units of the radius of curvature and the thickness / distance are all in millimeters (mm). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity means infinity.

[0233] Surf Radius Thickness Nd Vd 1 18.2379 3.9366 1.69 53.15 2 17.1428 3.4895 3 -17.8100 1.2274 1.62 36.35 4 15.3022 11.5388 1.62 63.41 5 -15.3022 0.1024 6 10.3402 9.3140 1.59 61.16 7 114.6164 2.6811 STO Infinity -2.5816 9 6.4053 1.5875 1.69 54.57 10 4.5169 2.8658 11 Infinity 1.0454 1.52 54.09 12 Infinity 4.1524 IMA / /

[0234] Table 9

[0235] In this example, both the first lens and the fourth lens are aspherical lenses.

[0236] Table 10 shows the conic coefficient k and the coefficients of the higher-order terms that can be used for the surface of the aspheric lens in this example. The surface shape of each aspheric lens can be defined by, but not limited to, the formula (1) in Example 1.

[0237] Surf K A B C D E F G 1 -0.4167 -1.4192E-04 -5.2490E-07 4.6734E-11 -8.2539E-11 1.5990E-12 -1.1694E-14 0.0000E+00 2 0.9552 -2.4488E-04 1.1307E-07 -9.2479E-09 2.2536E-10 -1.4776E-12 1.7878E-15 0.0000E+00 6 -0.5222 -1.1726E-05 1.0148E-07 -8.4543E-09 1.2331E-10 -1.4071E-12 4.8839E-15 0.0000E+00 7 159.4500 5.9026E-06 -1.6228E-06 4.2611E-09 1.4565E-10 -3.4094E-12 2.3693E-14 0.0000E+00

[0238] Table 10

[0239] Example 6

[0240] like Figure 6 As shown, the optical lens includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, an aperture STO, a fifth lens L5, a filter and an imaging surface IMA from the object side to the image side. For the sake of brevity, some descriptions similar to those in Example 1 will be omitted.

[0241] The first lens L1 has positive power, the first side surface S1 of the first lens is convex, and the second side surface S2 of the first lens is concave. The second lens L2 has negative power, the first side surface S3 of the second lens is concave, and the second side surface S4 of the second lens is concave. The third lens L3 has positive power, the first side surface S4 of the third lens is convex, and the second side surface S5 of the third lens is convex. The fourth lens L4 has positive power, the first side surface S6 of the fourth lens is convex, and the second side surface S7 of the fourth lens is concave. The fifth lens L5 has negative power, the first side surface S9 of the fifth lens is convex, and the second side surface S10 of the fifth lens is concave. The filter has a first side surface S11 of the filter and a second side surface S12 of the filter. Light from the object passes through each surface S1 to S12 in sequence and is finally imaged on the imaging surface IMA.

[0242] In this example, the focal length F of the optical lens is 14.0000 mm, the total length TTL of the optical lens is 33.3451 mm, and the maximum field of view FOV of the optical lens is 25.0200°.

[0243] In this example, the second lens and the third lens are cemented lenses, so the second side surface of the second lens and the first side surface of the third lens are both S4, but for the first side surface and the second side surface, when the radius of curvature is the same, the surface shapes of the two are different, so the second side surface S4 of the second lens is concave, and the first side surface S4 of the third lens is convex.

[0244] In this example, the first side surface of the first lens and the second side surface of the fourth lens have an inflection point.

[0245] Table 11 shows the basic structural parameters of the optical lens of Example 6, where the units of the radius of curvature and the thickness / distance are all millimeters (mm). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity means infinity.

[0246] Surf Radius Thickness Nd Vd 1 15.0245 3.3413 1.69 53.15 2 14.2811 2.9159 3 -14.7858 0.9151 1.62 36.35 4 12.6756 9.6011 1.62 63.41 5 -12.6756 0.0857 6 8.6322 7.8171 1.59 61.16 7 94.2069 1.7996 STO Infinity -1.7072 9 6.5338 1.3015 1.69 54.57 10 4.0867 2.3770 11 Infinity 0.8671 1.52 54.09 12 Infinity 4.0310 IMA / /

[0247] Table 11

[0248] In this example, both the first lens and the fourth lens are aspherical lenses.

[0249] Table 12 shows the conic coefficient k and the coefficients of the higher-order terms that can be used for the surface of the aspheric lens in this example. The surface shape of each aspheric lens can be defined using, but not limited to, the formula (1) in Example 1.

[0250]

[0251]

[0252] Table 12

[0253] Example 7

[0254] like Figure 7 As shown, the optical lens includes a first lens L1, a second lens L2, a third lens L3, an aperture STO, a fourth lens L4, a fifth lens L5, a filter and an imaging surface IMA in order from the object side to the image side. For the sake of brevity, some descriptions similar to those in Example 1 will be omitted.

[0255] The first lens L1 has positive power, the first side surface S1 of the first lens is convex, and the second side surface S2 of the first lens is concave. The second lens L2 has negative power, the first side surface S3 of the second lens is concave, and the second side surface S4 of the second lens is concave. The third lens L3 has positive power, the first side surface S4 of the third lens is convex, and the second side surface S5 of the third lens is convex. The fourth lens L4 has positive power, the first side surface S6 of the fourth lens is convex, and the second side surface S7 of the fourth lens is convex. The fifth lens L5 has negative power, the first side surface S9 of the fifth lens is convex, and the second side surface S10 of the fifth lens is concave. The filter has a first side surface S11 of the filter and a second side surface S12 of the filter. Light from the object passes through each surface S1 to S12 in sequence and is finally imaged on the imaging surface IMA.

[0256] In this example, the focal length F of the optical lens is 13.2025 mm, the total length TTL of the optical lens is 35.4123 mm, and the maximum field of view FOV of the optical lens is 25.0200°.

[0257] In this example, the second lens and the third lens are cemented lenses, so the second side surface of the second lens and the first side surface of the third lens are both S4, but for the first side surface and the second side surface, when the radius of curvature is the same, the surface shapes of the two are different, so the second side surface S4 of the second lens is concave, and the first side surface S4 of the third lens is convex.

[0258] Table 13 shows the basic structural parameters of the optical lens of Example 7, where the units of the radius of curvature and the thickness / distance are all millimeters (mm). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity means infinity.

[0259] Surf Radius Thickness Nd Vd 1 20.3879 3.4986 1.69 53.15 2 21.4358 3.0077 3 -21.8812 1.2297 1.62 36.35 4 9.3219 9.8960 1.62 63.41 5 -16.1748 0.2317 STO Infinity -0.1309 6 10.9568 10.4505 1.59 61.25 7 -98.3084 0.1052 9 4.9418 1.6264 1.69 31.08 10 3.4825 3.0000 11 Infinity 0.5000 1.52 54.09 12 Infinity 1.9975 IMA / /

[0260] Table 13

[0261] In this example, both the first lens and the fifth lens are aspherical lenses.

[0262] Table 14 shows the conic coefficient k and the coefficients of the higher-order terms that can be used for the surface of the aspheric lens in this example. The surface shape of each aspheric lens can be defined using, but not limited to, the formula (1) in Example 1.

[0263] Surf K A B C D E F G 1 0.4009 -8.7461E-05 -1.6983E-07 2.0782E-09 -8.3619E-11 1.1175E-12 -1.2241E-14 0.0000E+00 2 2.4591 -8.4723E-05 6.9420E-07 -2.7859E-08 2.2921E-10 -8.8192E-13 -2.3389E-14 0.0000E+00 9 -1.0124 2.7026E-04 -1.0187E-05 -1.0896E-06 -2.4458E-08 -2.8704E-09 3.1537E-11 0.0000E+00 10 -0.5810 -2.7474E-04 1.3077E-04 -1.5356E-05 -9.0441E-08 3.0100E-08 -5.5032E-10 0.0000E+00

[0264] Table 14

[0265] Example 8

[0266] like Figure 8 As shown, the optical lens includes a first lens L1, a second lens L2, a third lens L3, an aperture STO, a fourth lens L4, a fifth lens L5, a filter and an imaging surface IMA in order from the object side to the image side. For the sake of brevity, some descriptions similar to those in Example 1 will be omitted.

[0267] The first lens L1 has positive power, the first side surface S1 of the first lens is convex, and the second side surface S2 of the first lens is concave. The second lens L2 has negative power, the first side surface S3 of the second lens is concave, and the second side surface S4 of the second lens is concave. The third lens L3 has positive power, the first side surface S4 of the third lens is convex, and the second side surface S5 of the third lens is convex. The fourth lens L4 has positive power, the first side surface S6 of the fourth lens is convex, and the second side surface S7 of the fourth lens is convex. The fifth lens L5 has negative power, the first side surface S9 of the fifth lens is convex, and the second side surface S10 of the fifth lens is concave. The filter has a first side surface S11 of the filter and a second side surface S12 of the filter. Light from the object passes through each surface S1 to S12 in sequence and is finally imaged on the imaging surface IMA.

[0268] In this example, the focal length F of the optical lens is 13.1955 mm, the total length TTL of the optical lens is 35.5056 mm, and the maximum field of view FOV of the optical lens is 25.0200°.

[0269] In this example, the second lens and the third lens are cemented lenses, so the second side surface of the second lens and the first side surface of the third lens are both S4, but for the first side surface and the second side surface, when the radius of curvature is the same, the surface shapes of the two are different, so the second side surface S4 of the second lens is concave, and the first side surface S4 of the third lens is convex.

[0270] Table 15 shows the basic structural parameters of the optical lens of Example 8, where the units of the radius of curvature and the thickness / distance are all millimeters (mm). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity means infinity.

[0271]

[0272]

[0273] Table 15

[0274] In this example, both the first lens and the fifth lens are aspherical lenses.

[0275] Table 16 shows the conic coefficient k and the coefficients of the higher-order terms that can be used for the surface of the aspheric lens in this example. The surface shape of each aspheric lens can be defined using, but not limited to, formula (1) in Example 1.

[0276] Surf K A B C D E F G 1 -0.5490 -9.8754E-05 -4.3690E-07 3.0442E-09 -3.4968E-11 2.1634E-12 -2.7560E-14 0.0000E+00 2 2.1500 -8.8966E-05 5.3305E-07 -1.1881E-08 3.1905E-10 9.9724E-14 -4.1819E-14 0.0000E+00 9 -1.3589 -2.5658E-05 -2.4057E-05 -1.4475E-06 3.3578E-09 7.3751E-10 -2.2563E-12 0.0000E+00 10 -0.6500 -8.2904E-04 8.0040E-05 -1.3604E-05 6.6940E-08 2.9686E-08 -9.1586E-10 0.0000E+00

[0277] Table 16

[0278] In summary, Examples 1 to 8 respectively satisfy the relationships shown in Table 17.

[0279]

[0280]

[0281] Table 17

[0282] Table 18 gives the focal length value F of the entire group of optical lenses of Examples 1 to 8, the focal length values ​​F1 to F5 of each lens (unit: mm), etc.

[0283] Parameters / Examples 1 2 3 4 5 6 E7 E8 F 13.5189 13.5449 13.7197 13.7768 14.6995 14.0000 13.2025 13.1955 FNO 0.9656 0.9675 0.9000 1.0000 0.8000 0.8000 0.9430 0.9425 ENPD 14.0000 14.0000 15.2441 13.7768 18.3744 17.5000 14.0000 14.0000 TTL 41.8026 42.0514 37.5923 38.3304 39.3595 33.3451 35.4123 35.5056 FOV 25.0200 25.0200 25.0200 25.0200 25.0200 25.0200 25.0200 25.0200 θ 0.4367 0.4367 0.4367 0.4367 0.4367 0.4367 0.4367 0.4367 H 5.7640 5.9694 5.6146 6.1697 6.3820 5.9115 5.8235 5.8412 D 16.4000 16.4000 16.6000 16.6000 16.4418 13.6372 16.4000 16.4000 BFL 6.9517 7.2659 6.5314 7.2877 8.0637 7.2751 5.4975 5.4987 F1 337.5203 337.5203 416.6623 422.7750 917.5196 515.7288 260.1453 191.6578 F2 -15.0325 -15.0171 -12.5865 -12.7283 -13.4188 -11.1424 -10.6483 -10.5592 F3 15.7245 15.7245 11.6736 11.8148 14.6619 12.1542 11.3882 11.4683 F4 21.4219 21.4183 38.2993 38.7066 18.9864 15.8634 17.6221 17.1479 F5 792.2671 1379.6872 174.3676 178.6641 -34.1498 -20.4458 -31.8439 -26.3954 d1 3.9879 3.9879 4.5576 4.5363 3.9366 3.3413 3.4986 3.4990 d4 10.7834 10.7834 12.5000 12.7494 11.5388 9.6011 9.8960 10.4964 d5 3.6376 3.6376 0.2688 0.2605 0.1024 0.0857 0.2317 0.1032 d6 10.1386 10.0000 4.9843 5.0398 9.3140 7.8171 10.4505 10.5673 d9 1.5444 1.5403 4.4864 4.4847 1.5875 1.3015 1.6263 1.5761 Vd2 36.3479 36.3479 36.3479 36.3479 36.3479 36.3479 36.3479 36.3479 Vd3 63.4058 63.4058 63.4058 63.4058 63.4058 63.4058 63.4058 63.4058 D4 17.8263 17.8449 15.4699 14.1132 16.2637 13.5000 13.4085 13.7607 D9 7.8787 7.9862 11.2308 10.3111 9.3451 8.7002 9.5565 9.6253 D10 6.7503 6.9171 7.7692 7.2253 7.2940 6.9388 7.9306 7.7136 SAG(S4) -2.2955 -2.3007 -0.5818 -0.4849 -1.9649 -1.6307 -1.0524 -1.1077 F23 66.7401 66.3884 32.3077 32.2660 59.8245 49.5816 57.1487 57.6014

[0284] Table 18

[0285] Obviously, the above-described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0286] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0287] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0288] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An optical lens, characterized in that: include: A first lens, wherein the first lens has positive optical power, a first side surface of the first lens is a convex surface, and a second side surface of the first lens is a concave surface; A second lens, wherein the second lens has negative optical power, and a first side surface of the second lens and a second side surface of the second lens are both concave surfaces; A third lens, the third lens has positive optical power, and the first side surface of the third lens and the second side surface of the third lens are both convex surfaces; a fourth lens having positive optical power, wherein at least one of the first side surface of the fourth lens and the second side surface of the fourth lens is a convex surface; A fifth lens has optical power, a first side surface of the fifth lens is a convex surface, and a second side surface of the fifth lens is a concave surface.

2. The optical lens according to claim 1, characterized in that: The clear aperture D9 of the first side surface of the fifth lens, the optical back focus BFL of the optical lens, and the image height H corresponding to the maximum field angle of the optical lens satisfy the following: 7.2≤D9*BFL / H.

3. The optical lens according to claim 1, characterized in that: The clear aperture D10 of the second side surface of the fifth lens, the optical back focus BFL of the optical lens, and the image height H corresponding to the maximum field angle of the optical lens satisfy the following: 5.5≤D10*BFL / H≤15.

4. The optical lens according to claim 1, characterized in that: A curvature radius R1 of a first side surface of the first lens, a curvature radius R2 of a second side surface of the first lens, and a center thickness d1 of the first lens satisfy: 0.49≤R1 / (R2+d1)≤1.

5.

5. The optical lens according to claim 1, characterized in that: A focal length value F3 of the third lens and a focal length value F4 of the fourth lens satisfy: 0.1≤F3 / F4≤1.

6. The optical lens according to claim 1, characterized in that: The focal length value F5 of the fifth lens and the focal length value F of the entire optical lens group satisfy the following: -11≤F5 / F≤150.

7. The optical lens according to claim 1, characterized in that: The vector height SAG(S4) of the first side surface of the third lens and the clear aperture D4 of the first side surface of the third lens satisfy the following: -0.3≤arctan(SAG(S4) / D4).

8. The optical lens according to claim 1, characterized in that: The central thickness d6 of the fourth lens and the total optical length TTL of the optical lens satisfy the following relationship: 0.07≤d6 / TTL.

9. An optical lens, characterized in that: include: a first lens having positive optical power; a second lens having negative optical power; a third lens having positive optical power; a fourth lens having positive refractive power; a fifth lens having optical power; The combined focal length value F23 of the second lens and the third lens and the entire focal length value F of the optical lens group satisfy the following condition: F23 / F≤8.

10. An electronic device, characterized in that: The invention comprises the optical lens according to any one of claims 1 to 9 and an imaging element for converting an optical image formed by the optical lens into an electrical signal.

Images