Optical lens

Abstract

The application discloses an optical lens, comprising a lens barrel, a lens set and at least one shielding element contained in the lens barrel, the lens set comprising a first lens, a second lens, a third lens, a fourth lens and a fifth lens arranged in sequence from an object side to an image side along an optical axis, wherein the first lens and the second lens both have negative refractive power, and the fourth lens and the fifth lens are cemented; the at least one shielding element comprises a third shielding element located between the third lens and the fourth lens and in contact with an image side surface of the third lens; and an outer diameter of an object side end surface of the lens barrel is greater than an outer diameter of an image side end surface of the lens barrel. Half of a maximum field angle of the optical lens Semi-FOV, a maximum height of the lens barrel along the optical axis direction L, an inner diameter d0s of the object side end surface of the lens barrel, an inner diameter d0m of the image side end surface of the lens barrel and a relative F number Fno of the optical lens satisfy: 5.0 <= Tan(Semi-FOV) * L / (d0s + d0m) * Fno < 9.5.

Description

Technical Field

[0001] This application relates to the field of optical components, and more specifically, to an optical lens. Background Technology

[0002] In recent years, with the development of technology, especially the rapid development of emerging optical industries, users have placed higher demands on imaging devices for virtual reality / augmented reality (VR / AR) technology, and the requirements for image quality are also becoming increasingly stringent. Since VR / AR technology is mainly used in VR products or portable products, it requires lenses to be as small as possible and have as wide a field of view as possible. However, current wide-angle lenses often suffer from stray light problems caused by lens configuration, lens shaping, and light refraction and reflection. Therefore, those skilled in the art urgently need to propose a new wide-angle lens solution that can improve image quality while achieving lens miniaturization and a large field of view. Summary of the Invention

[0003] This application provides an optical lens, which may include a lens barrel and a lens group and at least one blocking element housed in the lens barrel. The lens group includes a first lens, a second lens, a third lens, a fourth lens, and a fifth lens arranged sequentially from the object side to the image side along the optical axis, wherein the first lens and the second lens both have negative optical power, and the fourth lens is cemented to the fifth lens. The at least one blocking element includes a third blocking element located between the third lens and the fourth lens and in contact with the image side of the third lens. The outer diameter of the object side end face of the lens barrel is larger than the outer diameter of its image side end face. The relative F-number Fno of the optical lens can satisfy the following: half of the maximum field of view (Semi-FOV) of the optical lens, the maximum height L of the lens barrel along the optical axis, the inner diameter d0s of the object side end face of the lens barrel, the inner diameter d0m of the image side end face of the lens barrel, and the optical lens relative F-number Fno: 5.0 ≤ Tan(Semi-FOV) × L / (d0s + d0m) × Fno < 9.5.

[0004] In one embodiment, the at least one blocking element further includes a first blocking element located between the first lens and the second lens and in contact with the image-side surface of the first lens; the radius of curvature R1 of the object-side surface of the first lens, the outer diameter D1s of the object-side surface of the first blocking element, the inner diameter d1s of the object-side surface of the first blocking element, and the distance EP01 from the object-side end face of the lens barrel to the object-side surface of the first blocking element on the optical axis can satisfy: 8.0 <R1×(D1s / d1s) / EP01<18.0。

[0005] In one embodiment, the at least one blocking element further includes: a first blocking element located between the first lens and the second lens and in contact with the image-side surface of the first lens; and a second blocking element located between the second lens and the third lens and in contact with the image-side surface of the second lens; the effective focal length f2 of the second lens, the outer diameter D1m of the image-side surface of the first blocking element, the outer diameter D2s of the object-side surface of the second blocking element, the distance EP12 from the image-side surface of the first blocking element to the object-side surface of the second blocking element on the optical axis, and the center thickness CT2 of the second lens on the optical axis can satisfy: 10.0 < |f2×(D1m-D2s) / (EP12×CT2)| < 30.0.

[0006] In one embodiment, the at least one blocking element further includes: a first blocking element located between the first lens and the second lens and in contact with the image-side surface of the first lens; and a second blocking element located between the second lens and the third lens and in contact with the image-side surface of the second lens; wherein the radius of curvature R3 of the object-side surface of the second lens, the maximum thickness CP1 of the first blocking element along the optical axis, the inner diameter d1m of the image-side surface of the first blocking element, the inner diameter d2s of the object-side surface of the second blocking element, and the radius of curvature R4 of the image-side surface of the second lens can satisfy: 0.0 < |R3|×CP1 / [(d1m-d2s)×R4] < 2.0.

[0007] In one embodiment, the at least one blocking element further includes: a first blocking element located between the first lens and the second lens and in contact with the image-side surface of the first lens; and a second blocking element located between the second lens and the third lens and in contact with the image-side surface of the second lens; the maximum thickness CP2 of the second blocking element along the optical axis, the air gap T23 between the second lens and the third lens on the optical axis, the maximum thickness CP1 of the first blocking element along the optical axis, the air gap T12 between the first lens and the second lens on the optical axis, and the combined focal length f12 of the first lens and the second lens can satisfy: -2.0mm < |CP2×T23+CP1×T12| / f12 < 0.0mm.

[0008] In one embodiment, the at least one blocking element further includes a first blocking element located between the first lens and the second lens and in contact with the image-side surface of the first lens; the radius of curvature R1 of the object-side surface of the first lens, the inner diameter d1s of the object-side surface of the first blocking element, and the effective focal length f1 of the first lens can satisfy: 5.0 mm. <R1×(d0s-d1s) / |f1|<11.0mm。

[0009] In one embodiment, the at least one blocking element further includes a second blocking element, located between the second lens and the third lens and in contact with the image-side surface of the second lens; the inner diameter d2m of the image-side surface of the second blocking element, the effective focal length f3 of the third lens, the outer diameter D2m of the image-side surface of the second blocking element, and the radius of curvature R5 of the object-side surface of the third lens can satisfy: 0.5 <d2m×f3 / |(D2m-d2m)×R5|<2.5。

[0010] In one embodiment, the at least one blocking element further includes a second blocking element located between the second lens and the third lens and in contact with the image-side surface of the second lens; the distance EP23 between the image-side surface of the second blocking element and the object-side surface of the third blocking element on the optical axis, the effective focal length f2 of the second lens, the effective focal length f3 of the third lens, the radius of curvature R3 of the object-side surface of the second lens, and the radius of curvature R5 of the object-side surface of the third lens can satisfy: 1.0 <EP23 / (f2+f3)+|R3 / R5|<16.0。

[0011] In one embodiment, the outer diameter D3s of the object-side surface of the third blocking element, the maximum thickness CP3 of the third blocking element along the optical axis, the radius of curvature R6 of the image-side surface of the third lens, the outer diameter D3m of the image-side surface of the third blocking element, and the radius of curvature R7 of the object-side surface of the fourth lens can satisfy: 5.0 mm. -1 <D3s / |CP3×R6|+D3m / |CP3×R7|<320.0mm -1 .

[0012] In one embodiment, the combined focal length f45 of the fourth lens and the fifth lens, the inner diameter d3m of the image-side surface of the third blocking element, the combined focal length f34 of the third lens and the fourth lens, and the inner diameter d3s of the object-side surface of the third blocking element can satisfy: 0 <f45 / d3m-f34 / d3s<5.0。

[0013] In one embodiment, the outer diameter D3s of the object side of the third blocking element, the center thickness CT4 of the fourth lens on the optical axis, the center thickness CT5 of the fifth lens on the optical axis, and the combined focal length f45 of the fourth and fifth lenses can satisfy: 0.2 < (D3s / d0m) × (CT4 + CT5) / f45 < 2.0.

[0014] The optical lens provided in this application includes a lens barrel and a five-element imaging lens group disposed within the lens barrel, and at least one blocking element. The first to fifth lenses are arranged sequentially along the optical axis from the object side to the image side. The first and second lenses both have negative optical power, and the fourth and fifth lenses are cemented together. Furthermore, a third blocking element is disposed between the third and fourth lenses, contacting the image side surface of the third lens. The outer diameter of the object-side end face of the lens barrel is larger than the outer diameter of its image-side end face. Through this arrangement of the lens, half of the maximum field of view Se of the lens is reasonably controlled. The parameters such as the semi-fov, the maximum height L of the lens barrel, the inner diameters d0s and d0m of the object-side and image-side end faces of the lens barrel, and the relative F-number Fno of the lens are set to satisfy the condition 5.0≤Tan(Semi-FOV)×L / (d0s+d0m)×Fno<9.5. This can effectively ensure the overall structural rationality of the optical imaging lens, ensure that the object-side inner diameter and image-side inner diameter of the optical imaging lens are within a reasonable range, and further control the brightness of the light entering the optical lens, thereby improving the imaging quality of the lens. Attached Figure Description

[0015] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments, taken in conjunction with the accompanying drawings. In the drawings:

[0016] Figure 1 A schematic diagram showing the structure and some parameters of an optical lens according to an exemplary embodiment of this application is provided;

[0017] Figure 2A This demonstrates the image quality of objects captured by existing optical lenses;

[0018] Figure 2B This illustrates a situation where the image quality of an object captured by an optical lens according to an exemplary embodiment of this application is improved;

[0019] Figure 3A and Figure 4A The following examples illustrate the stray light issues present in existing optical lenses;

[0020] Figure 3B and Figure 4B The examples illustrate how optical lenses according to exemplary embodiments of this application effectively reduce stray light;

[0021] Figure 5A This demonstrates the presence of internal stray light in existing optical lenses;

[0022] Figure 5B This illustrates an optical lens according to an exemplary embodiment of the present application that effectively reduces internal stray light;

[0023] Figure 6 andFigure 7 Schematic diagrams of the optical lens according to Embodiment 1 of this application are shown in two different embodiments.

[0024] Figure 8 to Figure 10 The on-axis chromatic aberration curve, astigmatism curve, and distortion curve of the optical lens of Example 1 are shown respectively.

[0025] Figure 11 and Figure 12 Schematic diagrams of the optical lens according to Embodiment 2 of this application are shown in two different embodiments.

[0026] Figure 13 to Figure 15 The on-axis chromatic aberration curve, astigmatism curve, and distortion curve of the optical lens of Example 2 are shown respectively.

[0027] Figure 16 and Figure 17 Schematic diagrams of the optical lens according to Embodiment 3 of this application are shown in two different embodiments.

[0028] Figure 18 to Figure 20 The on-axis chromatic aberration curve, astigmatism curve, and distortion curve of the optical lens of Example 3 are shown respectively.

[0029] Figure 21 and Figure 22 Schematic diagrams of the optical lens according to Embodiment 4 of this application are shown in two different embodiments; and

[0030] Figure 23 to Figure 25 The on-axis chromatic aberration curve, astigmatism curve, and distortion curve of the optical lens of Example 4 are shown respectively. Detailed Implementation

[0031] To better understand this application, various aspects of this application will be described in more detail with reference to the accompanying drawings. It should be understood that these detailed descriptions are merely illustrative of exemplary embodiments of this application and are not intended to limit the scope of this application in any way. Throughout the specification, the same reference numerals refer to the same elements. The expression "and / or" includes any and all combinations of one or more of the associated listed items.

[0032] It should be noted that in this specification, the terms "first," "second," "third," etc., are used only to distinguish one feature from another and do not imply any limitation on the features. Therefore, without departing from the teachings of this application, the first lens discussed below may also be referred to as the second lens or the third lens.

[0033] In the accompanying drawings, the thickness, size, and shape of the lenses have been slightly exaggerated for ease of illustration. Specifically, the shapes of the spherical or aspherical surfaces shown in the drawings are illustrated by way of example. That is, the shapes of the spherical or aspherical surfaces are not limited to those shown in the drawings. The drawings are for illustrative purposes only and are not strictly to scale.

[0034] In this paper, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the location of the convexity is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the location of the concaveness is not defined, it means that the lens surface is concave at least in the paraxial region. The surface shape in the paraxial region can be determined according to methods commonly used in the art, such as using the sign of the R value (R refers to the radius of curvature of the paraxial region) to determine concavity or convexity. In this paper, the surface of each lens closest to the subject is called the object-side surface of the lens, and the surface of each lens closest to the imaging plane is called the image-side surface of the lens. For the object-side surface, when the R value is positive, it is determined to be convex, and when the R value is negative, it is determined to be concave; for the image-side surface, when the R value is positive, it is determined to be concave, and when the R value is negative, it is determined to be convex.

[0035] It should also be understood that the terms "comprising," "including," "having," "containing," and / or "comprising," when used in this specification, indicate the presence of the stated features, elements, and / or components, but do not exclude the presence or addition of one or more other features, elements, components, and / or combinations thereof. Furthermore, when expressions such as "at least one of..." appear after a list of listed features, they modify the entire list of features, not individual elements in the list. Additionally, when describing embodiments of this application, the word "may" is used to mean "one or more embodiments of this application." And the term "exemplary" is intended to refer to an example or illustration.

[0036] Unless otherwise specified, all terms used herein (including technical and scientific terms) shall have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. It should also be understood that terms (e.g., those defined in common dictionaries) shall be interpreted as having a meaning consistent with their meaning in the context of the relevant art and shall not be interpreted in an idealized or overly formalized sense, unless expressly so specified herein.

[0037] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other. The following embodiments merely illustrate several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this application. It should be pointed out that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0038] The features, principles and other aspects of this application are described in detail below.

[0039] An optical lens according to an exemplary embodiment of this application may include a lens barrel and a lens group housed in the lens barrel and at least one blocking element. The lens group may be a five-element lens group, including a first lens, a second lens, a third lens, a fourth lens, and a fifth lens arranged sequentially along the optical axis from the object side to the image side.

[0040] In an exemplary embodiment, the outer diameter of the object-side end face (i.e., the surface of the lens barrel closest to the object-side end) may be larger than the outer diameter of its image-side end face (i.e., the surface of the lens barrel closest to the image-side end).

[0041] In an exemplary embodiment, the first lens may have negative optical power. The second lens may have negative optical power. The fourth and fifth lenses may be cemented together to form a cemented doublet lens.

[0042] In an exemplary embodiment, the optical lens may include one or more blocking elements. The object-side surface of any blocking element may contact an adjacent lens or another adjacent blocking element. The image-side surface of any blocking element may contact an adjacent lens or another adjacent blocking element.

[0043] In an exemplary embodiment, the optical lens may include a third blocking element located between the third lens and the fourth lens and in contact with the image side of the third lens.

[0044] In an exemplary embodiment, the optical lens of this application can satisfy the condition 5.0≤Tan(Semi-FOV)×L / (d0s+d0m)×Fno<9.5, where Semi-FOV is half of the maximum field of view of the optical lens, L is the maximum height of the lens barrel along the optical axis, d0s is the inner diameter of the object-side end face of the lens barrel, d0m is the inner diameter of the image-side end face of the lens barrel, and Fno is the relative F-number of the optical lens.

[0045] An optical lens according to an exemplary embodiment of the present application includes a lens barrel, a five-piece imaging lens group disposed in the lens barrel, and at least one shielding element. The first to fifth lenses are arranged in sequence from the object side to the image side along the optical axis. Among them, the first and second lenses both have negative optical powers, and the fourth and fifth lenses are cemented together. And a third shielding element that contacts the image side surface of the third lens is disposed between the third and fourth lenses. And the outer diameter of the object side end surface of the lens barrel is greater than the outer diameter of its image side end surface. By such a setting of the lens, and by reasonably controlling parameters such as half of the maximum field angle of the lens Semi-FOV, the maximum height L of the lens barrel, the inner diameters d0s and d0m of the object side end surface and the image side end surface of the lens barrel, and the relative F-number Fno of the lens, etc., to make it satisfy the conditional formula 5.0 ≤ Tan(Semi-FOV) × L / (d0s + d0m) × Fno < 9.5, it can effectively ensure the rationality of the overall structure of the optical imaging lens, ensure that the object side inner diameter and the image side inner diameter of the optical imaging lens are within a reasonable range, and can further control the light brightness entering the optical lens, and improve the imaging quality of the lens.

[0046] In an exemplary embodiment, the optical lens may further include a first shielding element located between the first lens and the second lens and contacting the image side surface of the first lens.

[0047] In an exemplary embodiment, the optical lens may further include a second shielding element located between the second lens and the third lens and contacting the image side surface of the second lens.

[0048] In an exemplary embodiment, the optical lens of the present application may satisfy the conditional formula 8.0 < R1 × (D1s / d1s) / EP01 < 18.0, where R1 is the curvature radius of the object side surface of the first lens, D1s is the outer diameter of the object side surface of the first shielding element, d1s is the inner diameter of the object side surface of the first shielding element, and EP01 is the distance on the optical axis from the object side end surface of the lens barrel to the object side surface of the first shielding element. By controlling the curvature radius of the object side surface of the first lens, the outer diameter of the object side surface of the first shielding element, the inner diameter of the object side surface of the first shielding element, and the distance on the optical axis from the object side end surface of the lens barrel to the object side surface of the first shielding element to satisfy the conditional formula 8.0 < R1 × (D1s / d1s) / EP01 < 18.0, it is possible to restrict the thickness, shape, and light converging degree of the first lens, further control the light passing amount of the light entering the second lens, improve the stray light generated after passing through the second lens, and improve the stray light yield of the lens. At the same time, by controlling the inner diameter of the first shielding element, it is possible to effectively block the stray light directly transmitted through the edge of the first lens, which is beneficial to improving the imaging quality.

[0049] In an exemplary embodiment, the optical lens of this application can satisfy the condition 10.0 < |f2×(D1m-D2s) / (EP12×CT2)| < 30.0, where f2 is the effective focal length of the second lens, D1m is the outer diameter of the image side of the first blocking element, D2s is the outer diameter of the object side of the second blocking element, EP12 is the distance on the optical axis from the image side of the first blocking element to the object side of the second blocking element, and CT2 is the center thickness of the second lens on the optical axis. By controlling the effective focal length of the second lens, the outer diameter of the image side of the first blocking element, the outer diameter of the object side of the second blocking element, the distance on the optical axis from the image side of the first blocking element to the object side of the second blocking element, and the center thickness of the second lens on the optical axis to satisfy the condition 10.0 < |f2×(D1m-D2s) / (EP12×CT2)| < 30.0, the edge thickness and center thickness of the second lens can be controlled within a reasonable range, which is beneficial to improving the stability of the lens. Furthermore, by reasonably controlling the edge thickness of the second lens, the edge curvature of the second lens can be avoided from being too large, making the lens forming easier.

[0050] In an exemplary embodiment, the optical lens of this application can satisfy the condition 0.0 < |R3|×CP1 / [(d1m-d2s)×R4] < 2.0, where R3 is the radius of curvature of the object side of the second lens, CP1 is the maximum thickness of the first blocking element along the optical axis, d1m is the inner diameter of the image side of the first blocking element, d2s is the inner diameter of the object side of the second blocking element, and R4 is the radius of curvature of the image side of the second lens. By controlling the radius of curvature of the object side of the second lens, the maximum thickness of the first blocking element along the optical axis, the inner diameter of the image side of the first blocking element, the inner diameter of the object side of the second blocking element, and the radius of curvature of the image side of the second lens to satisfy the condition 0.0 < |R3|×CP1 / [(d1m-d2s)×R4] < 2.0, the angle of light refraction on the object side and the angle of light refraction on the image side of the second lens can be reasonably controlled, so that the refractive power of the second lens is kept within a reasonable range. This is also beneficial for controlling the thickness of the middle and edge of the second lens and the difficulty of its molding. At the same time, it can also make the angle of light incident on the third lens smaller, avoiding stray light problems caused by the incident angle.

[0051] In an exemplary embodiment, the optical lens of the present application can satisfy the conditional formula -2.0mm < |CP2×T23 + CP1×T12| / f12 < 0.0mm, where CP2 is the maximum thickness of the second light shielding element along the optical axis direction, T23 is the air gap between the second lens and the third lens on the optical axis, CP1 is the maximum thickness of the first light shielding element along the optical axis direction, T12 is the air gap between the first lens and the second lens on the optical axis, and f12 is the combined focal length of the first lens and the second lens. By controlling the maximum thickness of the second light shielding element along the optical axis direction, the air gap between the second lens and the third lens on the optical axis, the maximum thickness of the first light shielding element along the optical axis direction, the air gap between the first lens and the second lens on the optical axis, and the combined focal length of the first lens and the second lens to satisfy the conditional formula -2.0mm < |CP2×T23 + CP1×T12| / f12 < 0.0mm, the combined focal length of the first lens and the second lens can be controlled to be negative, ensuring that the angles of the marginal rays of the field of view after refraction are easy to image. Further, the thicknesses of the first and second light shielding elements, the air gap between the first and second lenses, and the air gap between the second and third lenses can also be controlled. The larger the gap, the larger the adjustment space and the larger the stray light improvement space, which is beneficial to the improvement of the overall quality.

[0052] In an exemplary embodiment, the optical lens of the present application can satisfy the conditional formula 5.0mm < R1×(d0s - d1s) / |f1| < 11.0mm, where R1 is the curvature radius of the object side surface of the first lens, d0s is the inner diameter of the object side end face of the lens barrel, d1s is the inner diameter of the object side surface of the first light shielding element, and f1 is the effective focal length of the first lens. By controlling the curvature radius of the object side surface of the first lens, the inner diameter of the object side end face of the lens barrel, the inner diameter of the object side surface of the first light shielding element, and the effective focal length of the first lens to satisfy the conditional formula 5.0mm < R1×(d0s - d1s) / |f1| < 11.0mm, the shape and thickness of the first lens can be reasonably controlled, and by reasonably setting the inner diameters of the object side end face of the lens barrel and the object side surface of the first light shielding element, the stray light refracted from the object side surface of the first lens and incident on the second lens structure part can be blocked, improving the imaging quality.

[0053] In an exemplary embodiment, the optical lens of the present application can satisfy the conditional formula 0.5 < d2m × f3 / |(D2m - d2m) × R5| < 2.5, where d2m is the inner diameter of the image side of the second shielding element, f3 is the effective focal length of the third lens, D2m is the outer diameter of the image side of the second shielding element, and R5 is the curvature radius of the object side of the third lens. By controlling the inner diameter of the image side of the second shielding element, the effective focal length of the third lens, the outer diameter of the image side of the second shielding element, and the curvature radius of the object side of the third lens to satisfy the conditional formula 0.5 < d2m × f3 / |(D2m - d2m) × R5| < 2.5, the divergence degree of the light passing through the third lens can be restricted, and at the same time, the stray light reflected within the third lens structure part due to the stray light emitted from the second lens can be weakened, improving the stray light situation of the lens.

[0054] In an exemplary embodiment, the optical lens of the present application can satisfy the conditional formula 1.0 < EP23 / (f2 + f3) + |R3 / R5| < 16.0, where EP23 is the distance on the optical axis from the image side of the second shielding element to the object side of the third shielding element, f2 is the effective focal length of the second lens, f3 is the effective focal length of the third lens, R3 is the curvature radius of the object side of the second lens, and R5 is the curvature radius of the object side of the third lens. By controlling the distance on the optical axis from the image side of the second shielding element to the object side of the third shielding element, the effective focal length of the second lens, the effective focal length of the third lens, the curvature radius of the object side of the second lens, and the curvature radius of the object side of the third lens to satisfy the conditional formula 1.0 < EP23 / (f2 + f3) + |R3 / R5| < 16.0, reasonably control the curvature radius of the object side of the second lens, the curvature radius of the object side of the third lens, and the effective focal lengths of the two lenses, control the thickness of the second shielding element, change the installation position between the second lens and the third lens. The larger the interval, the larger the adjustment space, and the larger the stray light improvement space, which is beneficial to the improvement of the overall quality.

[0055] In an exemplary embodiment, the optical lens of the present application can satisfy the conditional formula 5.0mm -1 < D3s / |CP3 × R6| + D3m / |CP3 × R7| < 320.0mm -1 , where D3s is the outer diameter of the object side of the third shielding element, CP3 is the maximum thickness of the third shielding element along the optical axis direction, R6 is the curvature radius of the image side of the third lens, D3m is the outer diameter of the image side of the third shielding element, and R7 is the curvature radius of the object side of the fourth lens. By controlling the outer diameter of the object side of the third shielding element, the maximum thickness of the third shielding element along the optical axis direction, the curvature radius of the image side of the third lens, the outer diameter of the image side of the third shielding element, and the curvature radius of the object side of the fourth lens to satisfy the conditional formula 5.0mm -1<D3s / |CP3×R6|+D3m / |CP3×R7|<320.0mm -1 , the curvature radius of the image side of the third lens, the curvature radius of the object side of the fourth lens, and the thickness of the third shielding element itself can be reasonably controlled, thereby improving the thickness ratio of the fourth lens, making the molding of the fourth lens easier, and being able to reasonably control the distance between the third lens and the fourth lens, which is beneficial to ensuring the assembly stability; meanwhile, by adjusting the diaphragm to a suitable position, it is beneficial to adjust the aberration related to the diaphragm and control the light flux entering the fourth lens, meeting the requirements of the chip for main value parameters such as light flux and relative illuminance.

[0056] In an exemplary embodiment, the optical lens of the present application can satisfy the conditional formula 0 < f45 / d3m - f34 / d3s < 5.0, where f45 is the combined focal length of the fourth lens and the fifth lens, d3m is the inner diameter of the image side surface of the third shielding element, f34 is the combined focal length of the third lens and the fourth lens, and d3s is the inner diameter of the object side surface of the third shielding element. By controlling the combined focal length of the fourth lens and the fifth lens, the inner diameter of the image side surface of the third shielding element, the combined focal length of the third lens and the fourth lens, and the inner diameter of the object side surface of the third shielding element to satisfy the conditional formula 0 < f45 / d3m - f34 / d3s < 5.0, the diaphragm position can be controlled between the third lens and the fourth lens, and the light flux entering the fourth lens can be controlled, thereby meeting the requirements of the chip for main value parameters such as light flux and relative illuminance.

[0057] In an exemplary embodiment, the optical lens of the present application can satisfy the conditional formula 0.2 < (D3s / d0m)×(CT4 + CT5) / f45 < 2.0, where D3s is the outer diameter of the object side surface of the third shielding element, d0m is the inner diameter of the image side end surface of the lens barrel, CT4 is the central thickness of the fourth lens on the optical axis, CT5 is the central thickness of the fifth lens on the optical axis, and f45 is the combined focal length of the fourth lens and the fifth lens. By controlling the outer diameter of the object side surface of the third shielding element, the inner diameter of the image side end surface of the lens barrel, the central thickness of the fourth lens on the optical axis, the central thickness of the fifth lens on the optical axis, and the combined focal length of the fourth lens and the fifth lens to satisfy the conditional formula 0.2 < (D3s / d0m)×(CT4 + CT5) / f45 < 2.0, the distance between the diaphragm and the image plane can be reasonably controlled, the light flux of the light rays and the divergence degree of the chief ray can be controlled, and thus the distortion of the image plane can be controlled.

[0058] In an exemplary embodiment, the optical lens of the present application may include at least one diaphragm. The diaphragm can restrict the light path and control the light intensity. The diaphragm can be set at an appropriate position of the optical lens. For example, the diaphragm can be set between the third lens and the fourth lens.

[0059] In an exemplary embodiment, the optical lens may optionally include a filter for correcting color deviation and / or a protective glass for protecting the photosensitive element located on the imaging surface.

[0060] The optical lens according to the above embodiments of this application may include a lens barrel and a five-element imaging lens group disposed in the lens barrel and at least one blocking element. The first to fifth lenses are arranged sequentially from the object side to the image side along the optical axis, wherein the first and second lenses both have negative optical power, and the fourth and fifth lenses are cemented together; and a third blocking element is disposed between the third and fourth lenses, which contacts the image side of the third lens; and the outer diameter of the object side end face of the lens barrel is larger than the outer diameter of its image side end face. Through this arrangement of the lens, and by reasonably controlling the maximum field of view of the lens, The parameters such as half of the Semi-FOV, the maximum height L of the lens barrel, the inner diameters d0s and d0m of the object-side and image-side end faces of the lens barrel, and the relative F-number Fno of the lens are used to ensure that the condition 5.0≤Tan(Semi-FOV)×L / (d0s+d0m)×Fno<9.5. This can effectively ensure the overall structural rationality of the optical imaging lens, ensure that the object-side inner diameter and image-side inner diameter of the optical imaging lens are within a reasonable range, and further control the brightness of the light entering the optical lens, thereby improving the imaging quality of the lens.

[0061] The optical lens according to the above embodiments of this application can have the characteristics of miniaturization, large field of view, and high image quality. The optical lens according to the above embodiments of this application can significantly improve image quality, effectively reduce stray light, and effectively reduce in-lens reflection stray light. Figure 2A This demonstrates the image quality of objects captured by existing optical lenses. Figure 2B The image quality of an object captured by an optical lens according to an exemplary embodiment of this application is shown, and a comparison is made. Figure 2A and Figure 2B As can be seen, the imaging quality of the optical lens according to the exemplary embodiments of this application has been significantly improved. Figure 3A and Figure 4A The following are examples of stray light issues present in existing optical lenses. Figure 3B and Figure 4B The stray light conditions of optical lenses according to exemplary embodiments of this application are shown respectively, and compared. Figure 3A and Figure 3B ,as well as Figure 4A and Figure 4B As can be seen, the optical lens according to the exemplary embodiments of this application can effectively reduce stray light. Figure 5A This demonstrates the presence of internal stray light in existing optical lenses. Figure 5B The internal reflection stray light of an optical lens according to an exemplary embodiment of this application is shown in the comparison. Figure 5A andFigure 5B It can be seen that the optical lens according to the exemplary embodiment of the present application can effectively reduce internal reflection stray light.

[0062] In the embodiment of the present application, one or more aspherical surfaces may be provided on the surfaces of the first lens, the second lens, the third lens, the fourth lens and the fifth lens. The aspherical lens has better curvature radius characteristics and has the advantages of improving distortion aberration and astigmatism aberration. After using the aspherical lens, it is possible to eliminate the aberration that occurs during imaging as much as possible, thereby improving the imaging quality.

[0063] However, those skilled in the art should understand that without departing from the technical solutions claimed in the present application, the number of lenses constituting the optical lens can be changed, and the number of shielding elements can also be changed to obtain the various results and advantages described in this specification. The present application does not make specific limitations in this regard. 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. Again, for example, according to needs, the optical lens may also include other numbers of shielding elements different from those described in the above embodiment.

[0064] On the other hand, the optical lens according to the exemplary embodiment of the present application may include a lens barrel and a five-piece imaging lens group and at least one shielding element disposed in the lens barrel. The first to fifth lenses are arranged in sequence from the object side to the image side along the optical axis. Among them, the first and second lenses both have negative optical powers, and the fourth and fifth lenses are cemented; and a third shielding element in contact with the image side surface of the third lens is disposed between the third and fourth lenses; and the outer diameter of the object side end surface of the lens barrel is greater than the outer diameter of its image side end surface. By such a setting of the lens, and at the same time by reasonably controlling that the curvature radius R1 of the object side surface of the first lens, the outer diameter D1s of the object side surface of the first shielding element, the inner diameter d1s of the object side surface of the first shielding element, and the distance EP01 on the optical axis from the object side end surface of the lens barrel to the object side surface of the first shielding element satisfy the conditional formula 8.0 < R1 × (D1s / d1s) / EP01 < 18.0, it is possible to restrict the thickness, shape and the degree of light convergence of the first lens, further control the light passing amount of the light entering the second lens, improve the stray light generated after passing through the second lens, and enhance the stray light yield of the lens; at the same time, by controlling the inner diameter of the first shielding element, it is possible to effectively block the stray light directly transmitted through the edge of the first lens, which is beneficial to improving the imaging quality.

[0065] In another aspect, an optical lens according to an exemplary embodiment of the present application may include a lens barrel, a five-piece imaging lens group disposed in the lens barrel, and at least one shielding element. The first to fifth lenses are arranged in sequence from the object side to the image side along the optical axis. Among them, the first and second lenses both have negative optical powers, and the fourth and fifth lenses are cemented together. And a third shielding element that contacts the image side surface of the third lens is disposed between the third and fourth lenses. And the outer diameter of the object-side end surface of the lens barrel is set to be larger than the outer diameter of its image-side end surface. Through such a setting of the lens, and by reasonably controlling the maximum thickness CP2 of the second shielding element along the optical axis direction, the air gap T23 between the second lens and the third lens on the optical axis, the maximum thickness CP1 of the first shielding element along the optical axis direction, the air gap T12 between the first lens and the second lens on the optical axis, and the combined focal length f12 of the first lens and the second lens to satisfy the conditional formula -2.0mm < |CP2 × T23 + CP1 × T12| / f12 < 0.0mm, the combined focal length of the first lens and the second lens can be controlled to be negative, ensuring that the angles of the marginal rays of the field angle after refraction are easy to image. Further, the thicknesses of the first and second shielding elements, the air gap between the first and second lenses, and the air gap between the second and third lenses can also be controlled. The larger the gap, the larger the adjustment space and the larger the stray light improvement space, which is beneficial to the improvement of the overall quality.

[0066] In still another aspect, an optical lens according to an exemplary embodiment of the present application may include a lens barrel, a five-piece imaging lens group disposed in the lens barrel, and at least one shielding element. The first to fifth lenses are arranged in sequence from the object side to the image side along the optical axis. Among them, the first and second lenses both have negative optical powers, and the fourth and fifth lenses are cemented together. And a third shielding element that contacts the image side surface of the third lens is disposed between the third and fourth lenses. And the outer diameter of the object-side end surface of the lens barrel is set to be larger than the outer diameter of its image-side end surface. Through such a setting of the lens, and by reasonably controlling the inner diameter d2m of the image side surface of the second shielding element, the effective focal length f3 of the third lens, the outer diameter D2m of the image side surface of the second shielding element, and the curvature radius R5 of the object side surface of the third lens to satisfy the conditional formula 0.5 < d2m × f3 / |(D2m - d2m) × R5| < 2.5, the divergence degree of the light rays passing through the third lens can be restricted, and at the same time, the stray light reflected inside the third lens structure due to the stray light emitted from the second lens can be weakened, improving the stray light situation of this lens.

[0067] The following further describes specific embodiments of the optical lens applicable to the above embodiments with reference to the drawings.

[0068] Example 1

[0069] The following refers to Figure 6 Describe the optical lens according to Embodiment 1 of the present application.

[0070] AsFigure 1 As shown, in this embodiment, the optical lens includes a lens barrel P0 and a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, and a fifth lens E5 arranged sequentially along the optical axis from the object side to the image side, wherein the fourth lens E4 and the fifth lens E5 are cemented together to form a cemented doublet lens; the outer diameter of the object-side end face of the lens barrel P0 is larger than the outer diameter of its image-side end face.

[0071] In this embodiment, the optical lens further includes multiple blocking elements, wherein the first blocking element P1 is located between the first lens E1 and the second lens E2 and is in direct contact with the image side of the first lens E1; the second blocking element P2 is located between the second lens E2 and the third lens E3 and is in direct contact with the image side of the second lens E2; and the third blocking element P3 is located between the third lens E3 and the fourth lens E4 and is in direct contact with the image side of the third lens E3.

[0072] In this embodiment, the first lens E1 has negative optical power, its object-side surface S1 is convex, and its image-side surface S2 is concave. The second lens E2 has negative optical power, its object-side surface S3 is concave, and its image-side surface S4 is concave. The third lens E3 has positive optical power, its object-side surface S5 is convex, and its image-side surface S6 is concave. The fourth lens E4 has positive optical power, its object-side surface S7 is convex, and its image-side surface S8 is convex. The fifth lens E5 has negative optical power, its object-side surface S8 is concave, and its image-side surface S9 is convex.

[0073] Table 1 shows the basic parameters of the optical lens of Example 1, where the units for radius of curvature and thickness / distance are millimeters (mm).

[0074]

[0075] Table 1

[0076] In Example 1, the object-side surface and image-side surface of any one of the second lens E2 to the fifth lens E5 are aspherical surfaces, and the surface shape x of each aspherical lens can be defined using, but is not limited to, the following aspherical formula:

[0077]

[0078] Where x is the distance vector from the vertex of the aspherical surface at a height of h along the optical axis; c is the paraxial curvature of the aspherical surface, c = 1 / R (i.e., the paraxial curvature c is the reciprocal of the radius of curvature R in Table 1 above); k is the conic coefficient; Ai is the i-th order correction coefficient of the aspherical surface. Table 2 below gives the higher-order coefficients A4, A6, A8, A9, A10, A11, A12, A13, A14, A15, A16, A17, A18, A19 ... 10 A 12 A 14 and A 16 .

[0079] Surface number A4 A6 A8 A10 A12 A14 A16 S3 1.0582E-02 -2.5694E-03 2.0871E-04 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S4 5.2423E-02 -1.5297E-02 6.6388E-02 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S5 5.9759E-02 -1.2581E-01 1.1462E+00 -3.5953E+00 6.3650E+00 -5.6885E+00 2.0912E+00 S6 7.0654E-02 -9.0698E-02 7.5718E-01 -1.1937E+00 4.3950E-01 1.2393E+00 -3.5206E-01 S7 3.3269E-02 -2.2909E-01 1.5376E+00 -5.1078E+00 9.5109E+00 -9.3081E+00 3.7462E+00 S8 -1.1375E+00 2.6530E+00 -3.1239E+00 6.3913E+00 -8.1887E+00 4.1553E+00 2.7496E-01 S9 -5.7760E-02 3.4483E-01 -1.8761E-01 4.5629E-01 -1.2328E+00 1.5242E+00 -6.4502E-01

[0080] Table 2

[0081] Example 2

[0082] The following is for reference Figure 7 Describes an optical lens according to Embodiment 2 of this application.

[0083] like Figure 7 As shown, in this embodiment, the optical lens includes a lens barrel P0 and a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, and a fifth lens E5 arranged sequentially along the optical axis from the object side to the image side. The fourth lens E4 and the fifth lens E5 are cemented together to form a cemented doublet lens. The outer diameter of the object-side end face of the lens barrel P0 is larger than the outer diameter of its image-side end face. The optical lens also includes multiple blocking elements. A first blocking element P1 is located between the first lens E1 and the second lens E2 and directly contacts the image-side surface of the first lens E1. A second blocking element P2 is located between the second lens E2 and the third lens E3 and directly contacts the image-side surface of the second lens E2. A third blocking element P3 is located between the third lens E3 and the fourth lens E4 and directly contacts the image-side surface of the third lens E3.

[0084] The structure of the optical lens in this embodiment is the same as that of the optical lens in Embodiment 1. That is, the basic parameter table of the optical lens in this embodiment is the same as that in Table 1, and the table of higher-order coefficients of the aspherical mirror is the same as that in Table 2.

[0085] The difference between this embodiment and Embodiment 1 lies in the different structural dimensions of the lens barrel P0 and some of the blocking elements P1, P2, and P3. For example, the outer diameter D2s of the object side of the second blocking element P2, the outer diameter D2m of the image side of the second blocking element P2, the inner diameter d2s of the object side of the second blocking element P2, the inner diameter d2m of the image side of the second blocking element P2, the outer diameter D3s of the object side of the third blocking element P3, the outer diameter D3m of the image side of the third blocking element P3, the inner diameter d3s of the object side of the third blocking element P3, the inner diameter d3m of the image side of the third blocking element P3, the maximum thickness CP2 of the second blocking element P2 along the optical axis, the maximum thickness CP3 of the third blocking element P3 along the optical axis, and the distance EP23 between the image side of the second blocking element P2 and the object side of the third blocking element P3 on the optical axis are different. The parameters described above in Examples 1 and 2, as well as the following parameters: the outer diameter D1s of the object-side surface of the first blocking element P1, the outer diameter D1m of the image-side surface of the first blocking element P1, the inner diameter d1s of the object-side surface of the first blocking element P1, the inner diameter d1m of the image-side surface of the first blocking element P1, the inner diameter d0s of the object-side end face of the lens barrel P0, the inner diameter d0m of the image-side end face of the lens barrel P0, the maximum thickness CP1 of the first blocking element P1 along the optical axis, the distance EP01 between the object-side end face of the lens barrel P0 and the object-side surface of the first blocking element P1 along the optical axis, the distance EP12 between the image-side surface of the first blocking element P1 and the object-side surface of the second blocking element P2 along the optical axis, and the maximum height L of the lens barrel P0 along the optical axis, are shown in Table 9. Furthermore, some of the above parameters are illustrated in the structural diagram of the optical lens as follows: Figure 1 As shown.

[0086] Figure 8 The on-axis chromatic aberration curves of the optical lenses of Embodiments 1 and 2 are shown, which represent the deviation of light of different wavelengths from the convergent focal point after passing through the lens. Figure 9 The astigmatism curves of the optical lenses of Embodiments 1 and 2 are shown, which represent the meridional image plane curvature and the sagittal image plane curvature. Figure 10 The distortion curves of the optical lenses of Embodiments 1 and 2 are shown, representing the distortion magnitude values ​​corresponding to different half-field angles. According to... Figure 8 to Figure 10 It can be seen that the optical lenses given in Embodiments 1 and 2 can achieve good imaging quality.

[0087] Example 3

[0088] The following is for reference Figure 11 This paper describes an optical lens according to Embodiment 3 of this application. For the sake of brevity, descriptions similar to those in Embodiment 1 will be omitted in this embodiment and the following embodiments.

[0089] like Figure 11As shown, in this embodiment, the optical lens includes a lens barrel P0 and a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, and a fifth lens E5 arranged sequentially along the optical axis from the object side to the image side, wherein the fourth lens E4 and the fifth lens E5 are cemented together to form a cemented doublet lens; the outer diameter of the object-side end face of the lens barrel P0 is larger than the outer diameter of its image-side end face.

[0090] In this embodiment, the optical lens further includes multiple blocking elements, wherein the first blocking element P1 is located between the first lens E1 and the second lens E2 and is in direct contact with the image side of the first lens E1; the second blocking element P2 is located between the second lens E2 and the third lens E3 and is in direct contact with the image side of the second lens E2; and the third blocking element P3 is located between the third lens E3 and the fourth lens E4 and is in direct contact with the image side of the third lens E3.

[0091] In this embodiment, the first lens E1 has negative optical power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative optical power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens E3 has positive optical power, with its object-side surface S5 being convex and its image-side surface S6 being convex. The fourth lens E4 has negative optical power, with its object-side surface S7 being convex and its image-side surface S8 being concave. The fifth lens E5 has positive optical power, with its object-side surface S8 being convex and its image-side surface S9 being convex.

[0092] Table 3 shows the basic parameters of the optical lens of Example 3, where the units for radius of curvature and thickness / distance are millimeters (mm). Table 4 shows the higher-order coefficients A4, A6, A8, and A6 that can be used for the aspherical mirrors S3 to S9 in Example 3. 10 Each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0093]

[0094] Table 3

[0095] Surface number A4 A6 A8 A10 S3 3.0393E-02 -9.4980E-03 1.3270E-03 -1.0643E-04 S4 7.5003E-02 2.6933E-02 1.7857E-02 1.6840E-02 S5 -2.4264E-02 -1.3314E-02 0.0000E+00 0.0000E+00 S6 5.9918E-02 -4.3211E-02 3.5941E-02 -1.1385E-02 S7 1.1592E-01 -4.4311E-01 3.8017E-01 -2.0920E-01 S8 1.1910E+00 -2.0561E+00 1.5181E+00 -4.5810E-01 S9 -6.6446E-02 3.0630E-02 -3.2347E-02 1.4301E-02

[0096] Table 4

[0097] Example 4

[0098] The following is for reference Figure 12 The optical lens according to Embodiment 4 of this application is described.

[0099] like Figure 12As shown, in this embodiment, the optical lens includes a lens barrel P0 and a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, and a fifth lens E5 arranged sequentially along the optical axis from the object side to the image side. The fourth lens E4 and the fifth lens E5 are cemented together to form a cemented doublet lens. The outer diameter of the object-side end face of the lens barrel P0 is larger than the outer diameter of its image-side end face. The optical lens also includes multiple blocking elements. A first blocking element P1 is located between the first lens E1 and the second lens E2 and directly contacts the image-side surface of the first lens E1. A second blocking element P2 is located between the second lens E2 and the third lens E3 and directly contacts the image-side surface of the second lens E2. A third blocking element P3 is located between the third lens E3 and the fourth lens E4 and directly contacts the image-side surface of the third lens E3.

[0100] The structure of the optical lens in this embodiment is the same as that of the optical lens in embodiment 3. That is, the basic parameter table of the optical lens in this embodiment is the same as that in Table 3, and the table of higher-order coefficients of the aspherical mirror is the same as that in Table 4.

[0101] The difference between this embodiment and embodiment 3 lies in the different structural dimensions of the lens barrel P0 and some of the blocking elements P1, P2, and P3. For example, the outer diameter D1s of the object side of the first blocking element P1, the outer diameter D1m of the image side of the first blocking element P1, the inner diameter d1s of the object side of the first blocking element P1, the inner diameter d1m of the image side of the first blocking element P1, the outer diameter D3s of the object side of the third blocking element P3, the outer diameter D3m of the image side of the third blocking element P3, the inner diameter d3s of the object side of the third blocking element P3, the inner diameter d3m of the image side of the third blocking element P3, the inner diameter d0s of the object side end face of the lens barrel P0, and the inner diameter d0m of the image side end face of the lens barrel P0 are different. The parameters described above in Examples 1 and 2, as well as the following parameters: the outer diameter D2s of the object-side surface of the second blocking element P2, the outer diameter D2m of the image-side surface of the second blocking element P2, the inner diameter d2s of the object-side surface of the second blocking element P2, the inner diameter d2m of the image-side surface of the second blocking element P2, the maximum thickness CP1 of the first blocking element P1 along the optical axis, the maximum thickness CP2 of the second blocking element P2 along the optical axis, the maximum thickness CP3 of the third blocking element P3 along the optical axis, the distance EP01 from the object-side end face of the lens barrel P0 to the object-side surface of the first blocking element P1 along the optical axis, the distance EP12 from the image-side surface of the first blocking element P1 to the object-side surface of the second blocking element P2 along the optical axis, the distance EP23 from the image-side surface of the second blocking element P2 to the object-side surface of the third blocking element P3 along the optical axis, and the maximum height L of the lens barrel P0 along the optical axis, are shown in Table 9. Furthermore, some of the above parameters are illustrated in the structural diagram of the optical lens as follows: Figure 1 As shown.

[0102] Figure 13The on-axis chromatic aberration curves of the optical lenses of Embodiments 3 and 4 are shown, which represent the deviation of light of different wavelengths from the convergence focal point after passing through the lens. Figure 14 The astigmatism curves of the optical lenses of Embodiments 3 and 4 are shown, which represent the meridional image plane curvature and the sagittal image plane curvature. Figure 15 The distortion curves of the optical lenses of Embodiments 3 and 4 are shown, representing the distortion magnitude values ​​corresponding to different half-field angles. According to... Figure 13 to Figure 15 It can be seen that the optical lenses given in Examples 3 and 4 can achieve good imaging quality.

[0103] Example 5

[0104] The following is for reference Figure 16 The optical lens according to Embodiment 5 of this application is described.

[0105] like Figure 16 As shown, in this embodiment, the optical lens includes a lens barrel P0 and a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, and a fifth lens E5 arranged sequentially along the optical axis from the object side to the image side, wherein the fourth lens E4 and the fifth lens E5 are cemented together to form a cemented doublet lens; the outer diameter of the object-side end face of the lens barrel P0 is larger than the outer diameter of its image-side end face.

[0106] In this embodiment, the optical lens further includes multiple blocking elements, wherein the first blocking element P1 is located between the first lens E1 and the second lens E2 and is in direct contact with the image side of the first lens E1; the second blocking element P2 is located between the second lens E2 and the third lens E3 and is in direct contact with the image side of the second lens E2; and the third blocking element P3 is located between the third lens E3 and the fourth lens E4 and is in direct contact with the image side of the third lens E3.

[0107] In this embodiment, the first lens E1 has negative optical power, its object-side surface S1 is convex, and its image-side surface S2 is concave. The second lens E2 has negative optical power, its object-side surface S3 is concave, and its image-side surface S4 is concave. The third lens E3 has positive optical power, its object-side surface S5 is convex, and its image-side surface S6 is concave. The fourth lens E4 has positive optical power, its object-side surface S7 is convex, and its image-side surface S8 is convex. The fifth lens E5 has negative optical power, its object-side surface S8 is concave, and its image-side surface S9 is convex.

[0108] Table 5 shows the basic parameters of the optical lens of Example 5, where the units for radius of curvature and thickness / distance are millimeters (mm). Table 6 shows the higher-order coefficients A4, A6, A8, and A6 that can be used for the aspherical mirrors S3 to S9 in Example 5. 10 A 12 A 14 and A 16Each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0109]

[0110]

[0111] Table 5

[0112] Surface number A4 A6 A8 A10 A12 A14 A16 S3 8.3850E-03 -1.8189E-03 1.8292E-04 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S4 6.4754E-02 1.5443E-02 2.8613E-02 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S5 1.5799E-01 -2.1779E-01 1.0136E+00 -2.5985E+00 3.8274E+00 -2.8592E+00 8.7003E-01 S6 -1.3903E-01 7.9999E-01 -1.7845E+00 2.5359E+00 -2.1304E+00 1.2393E+00 -3.5206E-01 S7 -3.6888E-01 1.1014E+00 -3.1194E+00 5.4328E+00 -5.9024E+00 3.5712E+00 -9.4638E-01 S8 -1.4862E+00 3.3366E+00 -2.9140E+00 2.7583E+00 -1.8770E+00 -4.6366E-01 1.1539E+00 S9 -1.1496E-01 5.8524E-01 -7.5596E-01 1.6325E+00 -2.8366E+00 2.8009E+00 -1.0621E+00

[0113] Table 6

[0114] Example 6

[0115] The following is for reference Figure 17 The optical lens according to Embodiment 6 of this application is described.

[0116] like Figure 17 As shown, in this embodiment, the optical lens includes a lens barrel P0 and a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, and a fifth lens E5 arranged sequentially along the optical axis from the object side to the image side. The fourth lens E4 and the fifth lens E5 are cemented together to form a cemented doublet lens. The outer diameter of the object-side end face of the lens barrel P0 is larger than the outer diameter of its image-side end face. The optical lens also includes multiple blocking elements. A first blocking element P1 is located between the first lens E1 and the second lens E2 and directly contacts the image-side surface of the first lens E1. A second blocking element P2 is located between the second lens E2 and the third lens E3 and directly contacts the image-side surface of the second lens E2. A third blocking element P3 is located between the third lens E3 and the fourth lens E4 and directly contacts the image-side surface of the third lens E3.

[0117] The structure of the optical lens in this embodiment is the same as that of the optical lens in embodiment 5. That is, the basic parameter table of the optical lens in this embodiment is the same as that in Table 5, and the table of higher-order coefficients of the aspherical mirror is the same as that in Table 6.

[0118] The difference between this embodiment and embodiment 5 lies in the different structural dimensions of the lens barrel P0 and some of the blocking elements P1, P2, and P3. For example, the outer diameter D2s of the object side of the second blocking element P2, the outer diameter D2m of the image side of the second blocking element P2, the inner diameter d2s of the object side of the second blocking element P2, the inner diameter d2m of the image side of the second blocking element P2, the outer diameter D3s of the object side of the third blocking element P3, the inner diameter d0m of the image side end face of the lens barrel P0, the maximum thickness CP2 of the second blocking element P2 along the optical axis, and the distance EP23 between the image side of the second blocking element P2 and the object side of the third blocking element P3 on the optical axis are different. The parameters described above in Examples 5 and 6, as well as the following parameters: the outer diameter D1s of the object side of the first blocking element P1, the outer diameter D1m of the image side of the first blocking element P1, the inner diameter d1s of the object side of the first blocking element P1, the inner diameter d1m of the image side of the first blocking element P1, the outer diameter D3m of the image side of the third blocking element P3, the inner diameter d3s of the object side of the third blocking element P3, the inner diameter d3m of the image side of the third blocking element P3, the inner diameter d0s of the object side end face of the lens barrel P0, the maximum thickness CP1 of the first blocking element P1 along the optical axis, the maximum thickness CP3 of the third blocking element P3 along the optical axis, the distance EP01 from the object side end face of the lens barrel P0 to the object side of the first blocking element P1 along the optical axis, the distance EP12 from the image side of the first blocking element P1 to the object side of the second blocking element P2 along the optical axis, and the maximum height L of the lens barrel P0 along the optical axis are shown in Table 9. And, some of the above parameters are illustrated in the structural diagram of the optical lens as follows: Figure 1 As shown.

[0119] Figure 18 The on-axis chromatic aberration curves of the optical lenses of Embodiments 5 and 6 are shown, which represent the deviation of light of different wavelengths from the convergence focal point after passing through the lens. Figure 19 The astigmatism curves of the optical lenses of Embodiments 5 and 6 are shown, which represent the meridional image plane curvature and the sagittal image plane curvature. Figure 20 The distortion curves of the optical lenses of Embodiments 5 and 6 are shown, representing the distortion magnitude values ​​corresponding to different half-field angles. According to... Figure 18 to Figure 20 It can be seen that the optical lenses given in Examples 5 and 6 can achieve good imaging quality.

[0120] Example 7

[0121] The following is for reference Figure 21 The optical lens according to Embodiment 7 of this application is described.

[0122] like Figure 21As shown, in this embodiment, the optical lens includes a lens barrel P0 and a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, and a fifth lens E5 arranged sequentially along the optical axis from the object side to the image side, wherein the fourth lens E4 and the fifth lens E5 are cemented together to form a cemented doublet lens; the outer diameter of the object-side end face of the lens barrel P0 is larger than the outer diameter of its image-side end face.

[0123] In this embodiment, the optical lens further includes multiple blocking elements, wherein the first blocking element P1 is located between the first lens E1 and the second lens E2 and is in direct contact with the image side of the first lens E1; the second blocking element P2 is located between the second lens E2 and the third lens E3 and is in direct contact with the image side of the second lens E2; and the third blocking element P3 is located between the third lens E3 and the fourth lens E4 and is in direct contact with the image side of the third lens E3.

[0124] In this embodiment, the first lens E1 has negative optical power, its object-side surface S1 is convex, and its image-side surface S2 is concave. The second lens E2 has negative optical power, its object-side surface S3 is convex, and its image-side surface S4 is concave. The third lens E3 has positive optical power, its object-side surface S5 is concave, and its image-side surface S6 is convex. The fourth lens E4 has negative optical power, its object-side surface S7 is convex, and its image-side surface S8 is concave. The fifth lens E5 has positive optical power, its object-side surface S8 is convex, and its image-side surface S9 is convex.

[0125] Table 7 shows the basic parameters of the optical lens of Example 7, where the units for radius of curvature and thickness / distance are millimeters (mm). Table 8 shows the higher-order coefficients A4, A6, A8, and A6 that can be used for the aspherical mirrors S3 to S9 in Example 7. 10 A 12 A 14 and A 16 Each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0126]

[0127] Table 7

[0128] Surface number A4 A6 A8 A10 A12 A14 A16 S3 -1.7850E-01 -4.6370E-01 6.4421E-01 -5.3757E-01 4.3546E-01 -2.7162E-01 6.6334E-02 S4 -2.7775E-01 -4.6998E-01 -2.2883E+00 1.5198E+01 -3.8166E+01 4.6316E+01 -2.2184E+01 S5 5.0505E-02 -1.8609E-01 2.2441E-01 -1.6746E-02 1.5094E-01 -2.4771E-01 1.5694E-01 S6 -9.4530E-02 -3.8530E-02 1.0578E-01 -1.0994E-01 1.5292E-13 -1.2845E-17 3.1087E-19 S7 -8.1366E-02 4.0552E-02 -1.2593E-01 1.2249E-01 -3.9384E-15 -1.6120E-17 -7.2098E-20 S8 4.9887E-01 -1.1483E+00 1.7300E+00 -2.1385E+00 -4.9420E-01 3.6846E+00 -2.7167E+00 S9 -1.0012E-02 6.3384E-02 -2.7212E-01 8.8171E-01 -1.6207E+00 1.5868E+00 -6.0835E-01

[0129] Table 8

[0130] Example 8

[0131] The following is for reference Figure 22 The optical lens according to Embodiment 8 of this application is described.

[0132] like Figure 22As shown, in this embodiment, the optical lens includes a lens barrel P0 and a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, and a fifth lens E5 arranged sequentially along the optical axis from the object side to the image side. The fourth lens E4 and the fifth lens E5 are cemented together to form a cemented doublet lens. The outer diameter of the object-side end face of the lens barrel P0 is larger than the outer diameter of its image-side end face. The optical lens also includes multiple blocking elements. A first blocking element P1 is located between the first lens E1 and the second lens E2 and directly contacts the image-side surface of the first lens E1. A second blocking element P2 is located between the second lens E2 and the third lens E3 and directly contacts the image-side surface of the second lens E2. A third blocking element P3 is located between the third lens E3 and the fourth lens E4 and directly contacts the image-side surface of the third lens E3.

[0133] The structure of the optical lens in this embodiment is the same as that of the optical lens in embodiment 7. That is, the basic parameter table of the optical lens in this embodiment is the same as that in Table 7, and the table of higher-order coefficients of the aspherical mirror is the same as that in Table 8.

[0134] The difference between this embodiment and embodiment 7 lies in the different structural dimensions of the lens barrel P0 and some of the blocking elements P1, P2, and P3. For example, the outer diameter D1s of the object side of the first blocking element P1, the outer diameter D1m of the image side of the first blocking element P1, the inner diameter d1s of the object side of the first blocking element P1, the inner diameter d1m of the image side of the first blocking element P1, the outer diameter D3s of the object side of the third blocking element P3, the outer diameter D3m of the image side of the third blocking element P3, the inner diameter d3s of the object side of the third blocking element P3, the inner diameter d3m of the image side of the third blocking element P3, the maximum thickness CP1 of the first blocking element P1 along the optical axis, the maximum thickness CP3 of the third blocking element P3 along the optical axis, the distance EP12 from the image side of the first blocking element P1 to the object side of the second blocking element P2 on the optical axis, and the distance EP23 from the image side of the second blocking element P2 to the object side of the third blocking element P3 on the optical axis are different. The parameters described above in Examples 5 and 6, as well as the following parameters: the outer diameter D2s of the object-side surface of the second blocking element P2, the outer diameter D2m of the image-side surface of the second blocking element P2, the inner diameter d2s of the object-side surface of the second blocking element P2, the inner diameter d2m of the image-side surface of the second blocking element P2, the inner diameter d0s of the object-side end face of the lens barrel P0, the inner diameter d0m of the image-side end face of the lens barrel P0, the maximum thickness CP2 of the second blocking element P2 along the optical axis, the distance EP01 from the object-side end face of the lens barrel P0 to the object-side surface of the first blocking element P1 along the optical axis, and the maximum height L of the lens barrel P0 along the optical axis, are shown in Table 9. Furthermore, some of the above parameters are illustrated in the structural diagram of the optical lens as follows: Figure 1 As shown.

[0135] Figure 23The on-axis chromatic aberration curves of the optical lenses of Embodiments 7 and 8 are shown, which represent the deviation of light of different wavelengths from the convergence focal point after passing through the lens. Figure 24 The astigmatism curves of the optical lenses of Embodiments 7 and 8 are shown, which represent the meridional image plane curvature and the sagittal image plane curvature. Figure 25 The distortion curves of the optical lenses of Embodiments 7 and 8 are shown, representing the distortion magnitude values ​​corresponding to different half-field angles. According to... Figure 23 to Figure 25 It can be seen that the optical lenses given in Examples 7 and 8 can achieve good imaging quality.

[0136]

[0137]

[0138] Table 9

[0139] Furthermore, in Examples 1 to 8, the effective focal length f of the optical lens and the effective focal length values ​​f1 to f5 of each lens are shown in Table 10.

[0140] Parameter / Example 1 2 3 4 5 6 7 8 f (mm) 0.87 0.87 0.93 0.93 0.93 0.93 1.09 1.09 f1 (mm) -3.70 -3.70 -3.61 -3.61 -4.76 -4.76 -3.25 -3.25 f2 (mm) -1.82 -1.82 -2.24 -2.24 -1.92 -1.92 -5.76 -5.76 f3 (mm) 3.29 3.29 1.76 1.76 8.17 8.17 7.08 7.08 f4 (mm) 1.21 1.21 -3.06 -3.06 1.28 1.28 -11.57 -11.57 f5 (mm) -2.56 -2.56 2.37 2.37 -2.16 -2.16 1.39 1.39

[0141] Table 10

[0142] Examples 1 to 8 respectively satisfy the conditions shown in Table 11.

[0143] Condition / Example 1 2 3 4 5 6 7 8 R1 x (D1s / d1s) / EP01 12.67 12.67 17.73 17.72 17.55 17.55 14.04 8.17 |f2 x (D1m-D2s) / (EP12 x CT2)| 23.52 17.35 15.26 15.29 10.33 13.90 29.94 15.64 |R3| x CP1 / [(d1m-d2s) x R4] 0.66 0.39 0.39 0.39 0.15 0.19 0.01 1.89 |CP2 x T23 + CP1 x T12| / f12 (mm) -1.20 -0.05 -0.04 -0.04 -0.05 -1.61 -0.03 -1.14 R1 x (d0s-d1s) / |f1| (mm) 6.68 6.68 9.69 9.70 5.20 5.20 10.01 9.71 d2m x f3 / |(D2m-d2m) x R5| 2.07 1.29 0.80 0.80 1.47 2.12 1.36 1.36 (D3s / d0m) x (CT4+CT5) / f45 0.90 1.20 0.22 0.22 1.81 1.89 1.56 1.47 EP23 / (f2+f3) + |R3 / R5| 14.83 15.41 15.92 15.92 4.45 4.28 1.10 1.04 D3s / |CP3 x R6| + D3m / |CP3 x R7| (mm -1 )]]> 5.58 160.82 161.45 161.16 236.80 237.70 317.10 14.55 f45 / d3m-f34 / d3s 0.20 0.09 4.89 4.91 0.06 0.06 0.24 0.39 Tan (Semi-FOV) x L / (d0s+d0m) x Fno 7.31 7.31 5.42 5.42 9.09 9.08 5.00 5.00

[0144] Table 11

[0145] This application also provides an imaging device equipped with an electronic photosensitive element for imaging. The electronic photosensitive element can be a charge-coupled device (CCD) or a complementary metal oxide semiconductor (CMOS) device. The imaging device can be a standalone imaging device such as a digital camera, or an imaging module integrated into a mobile electronic device such as a mobile phone. The imaging device is equipped with the optical lens described above.

[0146] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of protection involved in this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the concept of this application. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. An optical lens characterized in that, The optical lens comprises a lens barrel, a lens group and at least one shielding element accommodated in the lens barrel, The lens group comprises, in order from the object side to the image side along the optical axis, a first lens, a second lens, a third lens, a fourth lens and a fifth lens, wherein the first lens and the second lens both have negative refractive power, the third lens has positive refractive power, the fourth lens and the fifth lens are cemented, and the fourth lens and the fifth lens have opposite positive and negative properties of refractive power; The object side surface of the first lens is convex, and the image side surface of the first lens is concave; the image side surface of the second lens is concave; the object side surface of the fourth lens is convex; and the image side surface of the fifth lens is convex; The at least one shielding element comprises a first shielding element, a second shielding element and a third shielding element, the first shielding element is located between the first lens and the second lens and in contact with the image side surface of the first lens, the second shielding element is located between the second lens and the third lens and in contact with the image side surface of the second lens, and the third shielding element is located between the third lens and the fourth lens and in contact with the image side surface of the third lens; The outer diameter of the object side end surface of the lens barrel is greater than the outer diameter of the image side end surface of the lens barrel; and The number of lenses with refractive power in the optical lens is five; The optical lens satisfies: 5.0≤Tan(Semi-FOV)×L / (d0s+d0m)×Fno≤9.09, 10.33≤|f2×(D1m-D2s) / (EP12×CT2)|≤29.94 and 1.0<EP23 / (f2+f3)+|R3 / R5|≤15.92; wherein Semi-FOV is half of the maximum field of view angle of the optical lens, L is the maximum height of the lens barrel along the optical axis, d0s is the inner diameter of the object side end surface of the lens barrel, d0m is the inner diameter of the image side end surface of the lens barrel, Fno is the relative F number of the optical lens, f2 is the effective focal length of the second lens, D1m is the outer diameter of the image side surface of the first shielding element, D2s is the outer diameter of the object side surface of the second shielding element, EP12 is the distance from the image side surface of the first shielding element to the object side surface of the second shielding element on the optical axis, CT2 is the central thickness of the second lens on the optical axis, EP23 is the distance from the image side surface of the second shielding element to the object side surface of the third shielding element on the optical axis, f3 is the effective focal length of the third lens, R3 is the radius of curvature of the object side surface of the second lens, and R5 is the radius of curvature of the object side surface of the third lens.

2. The optical lens according to claim 1, wherein The radius of curvature R1 of the object side surface of the first lens, the outer diameter D1s of the object side surface of the first shielding element, the inner diameter d1s of the object side surface of the first shielding element and the distance EP01 from the object side end surface of the lens barrel to the object side surface of the first shielding element on the optical axis satisfy: 8.17≤R1×(D1s / d1s) / EP01≤17.

73.

3. The optical lens according to claim 1, wherein a radius of curvature R3 of an object side surface of the second lens, a maximum thickness CP1 of the first blocking element in the direction of the optical axis, an inner diameter dlm of an image side surface of the first blocking element, an inner diameter d2s of an object side surface of the second blocking element, and a radius of curvature R4 of an image side surface of the second lens satisfy: 0.0 < |R3| x CP1 / [(dlm-d2s) x R4] < 1.

89.

4. The optical lens according to claim 1, wherein a maximum thickness CP2 of the second blocking element in the direction of the optical axis, an air separation T23 of the second lens and the third lens on the optical axis, a maximum thickness CP1 of the first blocking element in the direction of the optical axis, an air separation T12 of the first lens and the second lens on the optical axis, and a combined focal length f12 of the first lens and the second lens satisfy: -1.61 mm < |CP2 x T23 + CP1 x T12| / f12 < 0.0 mm.

5. The optical lens according to claim 1, wherein a radius of curvature R1 of an object side surface of the first lens, an inner diameter dls of an object side surface of the first blocking element, and an effective focal length fl of the first lens satisfy: 5.20 mm < R1 x (dOs-dls) / |fl| < 10.01 mm.

6. The optical lens according to claim 1, wherein an inner diameter d2m of an image side surface of the second blocking element, an effective focal length f3 of the third lens, an outer diameter D2m of an image side surface of the second blocking element, and a radius of curvature R5 of an object side surface of the third lens satisfy: 0.80 < d2m x f3 / |(D2m-d2m) x R5| < 2.

12. an outer diameter D3s of an object side surface of the third blocking element, a maximum thickness CP3 of the third blocking element in the direction of the optical axis, a radius of curvature R6 of an image side surface of the third lens, an outer diameter D3m of an image side surface of the third blocking element, and a radius of curvature R7 of an object side surface of the fourth lens satisfy: 0.0 < (D3s x R6) / (D3m x R7) < 1.

89. a combined focal length f45 of the fourth lens and the fifth lens, an inner diameter d3m of an image side surface of the third blocking element, a combined focal length f34 of the third lens and the fourth lens, and an inner diameter d3s of an object side surface of the third blocking element satisfy: 0.06 < f45 / d3m - f34 / d3s < 4.

91. an outer diameter D3s of an object side surface of the third blocking element, a central thickness CT4 of the fourth lens on the optical axis, a central thickness CT5 of the fifth lens on the optical axis, and a combined focal length f45 of the fourth lens and the fifth lens satisfy: 0.2 < (D3s / dOm) x (CT4 + CT5) / f45 < 1.

89. ​ ​ ​ ​ ​ 7. The optical lens of any of claims 1 to 6, wherein, ​ 5.58 mm -1 ≤ D3s / |CP3 x R6| + D3m / |CP3 x R7| ≤ 317.10 mm -1 .

8. The optical lens of any of claims 1 to 6, wherein, ​ ​ 9. The optical lens of any of claims 1 to 6, wherein, ​ ​

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