Optical lens

Abstract

The invention discloses an optical lens, which comprises a lens barrel, and a lens group and at least one shielding element accommodated in the lens barrel, and is characterized in that the lens group comprises a first lens, a second lens, a third lens, a fourth lens and a fifth lens which are sequentially arranged from an object side to an image side along an optical axis, the fourth lens is glued with the fifth lens; the at least one shielding element comprises a third shielding element which is positioned between the third lens and the fourth lens and is in contact with the image side surface of the third lens; the outer diameter of the object-side end face of the lens barrel is larger than that of the image-side end face of the lens barrel. Half Semi-FOV of the maximum field angle of the optical lens, the maximum height L of the lens barrel in the optical axis direction, 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 relative F number Fno of the optical lens meet the formula: 5.0 < = Tan (Semi-FOV) * L / (d0s + d0m) * Fnolt, 9.5.

Description

Technical Field

[0001] The present application relates to the field of optical elements, and more specifically, to an optical lens. Background Art

[0002] In recent years, with the development of technology, especially the rapid development of the emerging optical industry, users have put forward higher requirements for virtual reality / augmented reality (VR / AR) technology imaging equipment, and the requirements for imaging quality are also getting higher and higher. Since VR / AR technology is mainly used in VR products or portable products, the size of the lens is required to be as small as possible and the field of view angle is as large as possible. However, the current wide-angle lenses often have problems such as stray light caused by lens configuration, lens molding, and light refraction and reflection. Therefore, those skilled in the art urgently need to propose a new wide-angle lens solution that can improve the imaging quality of the lens while achieving miniaturization and a large field of view. Summary of the invention

[0003] The present application provides an optical lens, which may include a lens barrel, a lens group and at least one shielding element contained in the lens barrel, wherein the lens group includes a first lens, a second lens, a third lens, a fourth lens and a fifth lens arranged in sequence 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 glued to the fifth lens; the at least one shielding element includes a third shielding element, which is located between the third lens and the fourth lens and contacts 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 thereof; and half of the maximum field of view angle 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 surface of the lens barrel, the inner diameter d0m of the image side end surface of the lens barrel and the relative F number Fno of the optical lens may satisfy: 5.0≤Tan(Semi-FOV)×L / (d0s+d0m)×Fno<9.5.

[0004] In one embodiment, the at least one shielding element further includes a first shielding element, which is located between the first lens and the second lens and in contact with the image side surface of the first lens; 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 from the object side end surface of the lens barrel to the object side surface of the first shielding element on the optical axis may satisfy: 8.0 <R1×(D1s / d1s) / EP01<18.0。

[0005] In one embodiment, the at least one shielding element also includes: a first shielding 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 shielding 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 shielding element, the outer diameter D2s of the object side surface of the second shielding element, the distance EP12 from the image side surface of the first shielding element to the object side surface of the second shielding element on the optical axis, and the center thickness CT2 of the second lens on the optical axis may satisfy: 10.0<|f2×(D1m-D2s) / (EP12×CT2)|<30.0.

[0006] In one embodiment, the at least one blocking element also 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 curvature radius R3 of the object side surface of the second lens, the maximum thickness CP1 of the first blocking element along the optical axis direction, 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 curvature radius R4 of the image side surface of the second lens may satisfy: 0.0<|R3|×CP1 / [(d1m-d2s)×R4]<2.0.

[0007] In one embodiment, the at least one blocking element also 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 may satisfy: -2.0mm<|CP2×T23+CP1×T12| / f12<0.0mm.

[0008] In one embodiment, the at least one shielding element further includes a first shielding element, which is located between the first lens and the second lens and contacts the image side surface of the first lens; the curvature radius R1 of the object side surface of the first lens, the inner diameter d1s of the object side surface of the first shielding 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 shielding element further includes a second shielding element, which is located between the second lens and the third lens and contacts the image side surface of the second lens; 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 may satisfy: 0.5 <d2m×f3 / |(D2m-d2m)×R5|<2.5。

[0010] In one embodiment, the at least one shielding element further includes a second shielding element, which is located between the second lens and the third lens and in contact with the image side surface of the second lens; the distance EP23 from the image side surface of the second shielding element to the object side surface of the third shielding element on the optical axis, the effective focal length f2 of the second lens, the effective focal length f3 of the third lens, the curvature radius R3 of the object side surface of the second lens, and the curvature radius R5 of the object side surface of the third lens may 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 shielding element, the maximum thickness CP3 of the third shielding element along the optical axis, the curvature radius R6 of the image side surface of the third lens, the outer diameter D3m of the image side surface of the third shielding element and the curvature radius R7 of the object side surface of the fourth lens may 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 may satisfy: <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 lens and the fifth lens may satisfy: 0.2<(D3s / d0m)×(CT4+CT5) / f45<2.0.

[0014] The optical lens provided by the present application comprises a lens barrel, a five-piece imaging lens group and at least one shielding element arranged in the lens barrel, wherein the first to fifth lenses are arranged in sequence 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; and a third shielding element in contact with the image side surface of the third lens is arranged between the third and fourth lenses; and the outer diameter of the object side end surface of the lens barrel is arranged to be larger than the outer diameter of the image side end surface thereof, and through such arrangement of the lens, half of the maximum field of view angle of the lens Se is reasonably controlled at the same time. Parameters such as mi-FOV, the maximum height L of the lens barrel, the inner diameters d0s and d0m of the object side end face and the image side end face of the lens barrel, and the relative F number Fno of the lens are controlled to satisfy the conditional formula 5.0≤Tan(Semi-FOV)×L / (d0s+d0m)×Fno<9.5, which can effectively ensure the rationality of the overall structure 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 to improve the imaging quality of the lens. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

[0017] Figure 2A The image quality of objects photographed by existing optical lenses is shown;

[0018] Figure 2B It shows that the imaging quality of the object photographed by the optical lens according to the exemplary embodiment of the present application is improved;

[0019] Figure 3A and Figure 4A The existing optical lenses have stray light.

[0020] Figure 3B and Figure 4B The following respectively show how stray light is effectively reduced by the optical lens according to the exemplary embodiment of the present application;

[0021] Figure 5A It shows that the existing optical lens has internal reflected stray light;

[0022] Figure 5B The figure shows that the optical lens according to the exemplary embodiment of the present application effectively reduces the internal reflected stray light;

[0023] Figure 6 and Figure 7 The schematic diagrams of the structures of the optical lens according to Example 1 of the present application in two implementation modes are shown respectively;

[0024] Figures 8 to 10 The axial chromatic aberration curve, astigmatism curve and distortion curve of the optical lens of Example 1 are respectively shown;

[0025] Fig.11 and Fig.12 The schematic diagrams of the structures of the optical lens according to Example 2 of the present application in two implementation modes are shown respectively;

[0026] Figures 13 to 15 The axial chromatic aberration curve, astigmatism curve and distortion curve of the optical lens of Example 2 are respectively shown;

[0027] Fig.16 and Fig.17 The schematic diagrams of the structures of the optical lens according to Example 3 of the present application in two implementation modes are shown respectively;

[0028] Figures 18 to 20 The axial chromatic aberration curve, astigmatism curve and distortion curve of the optical lens of Example 3 are respectively shown;

[0029] Fig.21 and Fig. 22 Schematic diagrams of structures of an optical lens according to Example 4 of the present application in two implementation modes are shown respectively; and

[0030] Figure 23 to Figure 25 The axial chromatic aberration curve, astigmatism curve and distortion curve of the optical lens of Example 4 are respectively shown. DETAILED DESCRIPTION

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

[0032] 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.

[0033] In the drawings, the thickness, size and shape of the lenses have been slightly exaggerated for ease of explanation. 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 only examples and are not drawn strictly to scale.

[0034] In this article, the paraxial area refers to the area 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 area; 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 area. The judgment of the surface type in the paraxial area can be judged according to the general method in this field, for example, the positive and negative R value (R refers to the radius of curvature of the paraxial area) is used to judge the concave and convex. In this article, the surface of each lens closest to the subject is called the object side of the lens, and the surface of each lens closest to the imaging surface is called the image side of the lens. For the object 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 image 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.

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

[0036] Unless otherwise defined, all terms (including technical terms and scientific terms) used in this article have the same meaning as commonly understood by ordinary technicians in the field to which this application belongs. It should also be understood that terms (such as terms defined in commonly used dictionaries) should be interpreted as having the same meaning as their meaning in the context of the relevant technology, and will not be interpreted in an idealized or overly formal sense unless explicitly defined in this article.

[0037] It should be noted that, in the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The following embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for those of ordinary skill in the art, several variations and improvements can also be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. The present application will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

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

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

[0040] In an exemplary embodiment, the outer diameter of the object side end surface of the lens barrel (ie, the surface of the lens barrel closest to the object side end) may be greater than the outer diameter of the image side end surface thereof (ie, the surface of the lens barrel closest to the image side end).

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

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

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

[0044] In an exemplary embodiment, the optical lens of the present application may satisfy the condition 5.0≤Tan(Semi-FOV)×L / (d0s+d0m)×Fno<9.5, wherein 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 surface of the lens barrel, d0m is the inner diameter of the image side end surface 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 light-shielding element. The first to fifth lenses are arranged in order 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 light-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. Through such a setting of the lens, and by reasonably controlling parameters such as half of the maximum field of view 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 satisfy the conditional formula 5.0≤Tan(Semi-FOV)×L / (d0s + d0m)×Fno < 9.5, it can effectively ensure the overall structural rationality 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, improving the imaging quality of the lens.

[0046] In an exemplary embodiment, the optical lens may further include a first light-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 light-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 light-shielding element, d1s is the inner diameter of the object side surface of the first light-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 light-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 light-shielding element, the inner diameter of the object side surface of the first light-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 light-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 light-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 the present application may satisfy the condition 10.0<|f2×(D1m-D2s) / (EP12×CT2)|<30.0, wherein f2 is the effective focal length of the second lens, D1m is the outer diameter of the image side surface of the first blocking element, D2s is the outer diameter of the object side surface of the second blocking element, EP12 is the distance 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 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 surface of the first blocking element, the outer diameter of the object side surface of the second blocking element, the distance 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 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 middle 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, it is possible to avoid excessive edge curvature of the second lens, making lens molding easier.

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

[0051] In an exemplary embodiment, the optical lens of the present application can satisfy the conditional formula -2.0 mm < |CP2 × T23 + CP1 × T12| / f12 < 0.0 mm, where CP2 is the maximum thickness of the second light-blocking 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-blocking 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-blocking 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-blocking 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 -2.0 mm < |CP2 × T23 + CP1 × T12| / f12 < 0.0 mm, 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-blocking elements and the air gaps between the first and second lenses and between the second and third lenses can also be controlled. The larger the gap, the larger the adjustment space and the larger the space for improving stray light, 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 5.0 mm < R1 × (d0s - d1s) / |f1| < 11.0 mm, 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 surface of the lens barrel, d1s is the inner diameter of the object side surface of the first light-blocking 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 surface of the lens barrel, the inner diameter of the object side surface of the first light-blocking element, and the effective focal length of the first lens to satisfy the conditional formula 5.0 mm < R1 × (d0s - d1s) / |f1| < 11.0 mm, the shape and thickness of the first lens can be reasonably controlled, and by reasonably setting the inner diameters of the object side end surface of the lens barrel and the object side surface of the first light-blocking element, the stray light incident on the object side surface of the first lens and refracted to 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 light shielding element, f3 is the effective focal length of the third lens, D2m is the outer diameter of the image side of the second light 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 light shielding element, the effective focal length of the third lens, the outer diameter of the image side of the second light 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 in 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 light shielding element to the object side of the third light 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 light shielding element to the object side of the third light 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 light 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 light shielding element, CP3 is the maximum thickness of the third light 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 light 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 light shielding element, the maximum thickness of the third light 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 light 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|<320.0 mm -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 it easier to form the fourth lens, and being able to reasonably control the spacing between the third lens and the fourth lens, which is beneficial to ensuring the assembly stability; at the same time, by adjusting the aperture stop to a suitable position, it is beneficial to adjust the aberrations related to the aperture stop 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 expression 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 expression 0 < f45 / d3m - f34 / d3s < 5.0, the aperture stop 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 expression 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 expression 0.2 < (D3s / d0m)×(CT4 + CT5) / f45 < 2.0, the distance between the aperture stop 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 aperture stop. The aperture stop can restrict the light path and control the light intensity. The aperture stop can be disposed at an appropriate position of the optical lens. For example, the aperture stop can be disposed between the third lens and the fourth lens.

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

[0060] The optical lens according to the above-mentioned embodiment of the present application may include a lens barrel and a five-piece imaging lens group and at least one shielding element arranged in the lens barrel, wherein the first to fifth lenses are arranged in sequence from the object side to the image side along the optical axis, wherein the first and second lenses both have negative optical focal lengths, 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 arranged between the third and fourth lenses; and the outer diameter of the object side end surface of the lens barrel is arranged to be larger than the outer diameter of the image side end surface thereof, and through such arrangement of the lens and by reasonably controlling the maximum field of view angle 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 end face and the image side end face of the lens barrel, and the relative F number Fno of the lens are determined to satisfy the condition 5.0≤Tan(Semi-FOV)×L / (d0s+d0m)×Fno<9.5, which can effectively ensure the rationality of the overall structure 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 can further control the brightness of the light entering the optical lens to improve the imaging quality of the lens.

[0061] The optical lens according to the above embodiment of the present application can have the characteristics of miniaturization, large field of view and high imaging quality. The optical lens according to the above embodiment of the present application can significantly improve the imaging quality, effectively reduce stray light and effectively reduce the reflected stray light in the lens. Figure 2A It shows the imaging quality of objects photographed by existing optical lenses. Figure 2B The imaging quality of the object photographed by the optical lens according to the exemplary embodiment of the present application is shown. Figure 2A and Figure 2B It can be seen that the imaging quality of the optical lens according to the exemplary embodiment of the present application is significantly improved. Figure 3A and Figure 4A The existing optical lens has stray light. Figure 3B and Figure 4B The stray light of the optical lens according to the exemplary embodiment of the present application is shown respectively. Figure 3A and Figure 3B ,as well as Figure 4A and Figure 4B It can be seen that the optical lens according to the exemplary embodiment of the present application can effectively reduce stray light. Figure 5A It shows that the existing optical lens has internal reflected stray light. Figure 5B The internal reflected stray light of the optical lens according to the exemplary embodiment of the present application is shown. Figure 5A and Figure 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 appears 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 may be changed, and the number of shielding elements may 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 further 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 embodiments.

[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 larger 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 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 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 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 light 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 focal powers, and the fourth and fifth lenses are cemented together. And a third light 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 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 light 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 light 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, it is possible to control the combined focal length of the first lens and the second lens to be negative, ensuring that the angle of the marginal rays of the field of view after refraction is easy to image. Further, it is also possible to control 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. 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 light 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 focal powers, and the fourth and fifth lenses are cemented together. And a third light 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 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 light shielding element, the effective focal length f3 of the third lens, the outer diameter D2m of the image side surface of the second light 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, it is possible to restrict the divergence degree of the light passing through the third lens, and at the same time weaken the stray light reflected inside the third lens structure part by the stray light emitted from the second lens, 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 accompanying drawings.

[0068] Example 1

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

[0070] As Figure 1 As shown, in this embodiment, the optical lens comprises 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 in sequence from the object side to the image side along the optical axis, wherein the fourth lens E4 and the fifth lens E5 are cemented to form a doublet lens; the outer diameter of the object side end surface of the lens barrel P0 is greater than the outer diameter of the image side end surface thereof.

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

[0072] In this embodiment, the first lens E1 has negative power, its object side surface S1 is convex, and its image side surface S2 is concave. The second lens E2 has negative power, its object side surface S3 is concave, and its image side surface S4 is concave. The third lens E3 has positive power, its object side surface S5 is convex, and its image side surface S6 is concave. The fourth lens E4 has positive power, its object side surface S7 is convex, and its image side surface S8 is convex. The fifth lens E5 has negative 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, wherein the units of the radius of curvature and thickness / distance are both millimeters (mm).

[0074]

[0075] Table 1

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

[0077]

[0078] 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; Ai is the correction coefficient of the i-th order of the aspheric surface. Table 2 below gives the high-order coefficients A4, A6, A8, A9, A10, A11, A12, A13, A14, A15, A16, A17, A18, A19, A20, A21, A22, A23, A24, A25, A26, A27, A28, A29, A30, A31, A32, A33, A34, A35, A36, A37, A38, A39, 10 , A 12 , A 14 and A 16 .

[0079] Face 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 reference Figure 7 Describe the optical lens according to Example 2 of the present application.

[0083] like Figure 7 As shown, in this embodiment, the optical lens comprises 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 in sequence from the object side to the image side along the optical axis, wherein the fourth lens E4 and the fifth lens E5 are cemented to form a double cemented lens; the outer diameter of the object side end surface of the lens barrel P0 is greater than the outer diameter of the image side end surface thereof. The optical lens further comprises a plurality of shielding elements, wherein the first shielding element P1 is located between the first lens E1 and the second lens E2 and is in direct contact with the image side surface of the first lens E1; the second shielding element P2 is located between the second lens E2 and the third lens E3 and is in direct contact with the image side surface of the second lens E2; the third shielding element P3 is located between the third lens E3 and the fourth lens E4 and is in direct contact with the image side surface of the third lens E3.

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

[0085] The difference between this embodiment and the first embodiment is that the lens barrel P0 and some structural dimensions of the shielding elements P1, P2 and P3 are different. For example, the parameters such as the outer diameter D2s of the object side surface of the second shielding element P2, the outer diameter D2m of the image side surface of the second shielding element P2, the inner diameter d2s of the object side surface of the second shielding element P2, the inner diameter d2m of the image side surface of the second shielding element P2, the outer diameter D3s of the object side surface of the third shielding element P3, the outer diameter D3m of the image side surface of the third shielding element P3, the inner diameter d3s of the object side surface of the third shielding element P3, the inner diameter d3m of the image side surface of the third shielding element P3, the maximum thickness CP2 of the second shielding element P2 along the optical axis, the maximum thickness CP3 of the third shielding element P3 along the optical axis, and the distance EP23 from the image side surface of the second shielding element P2 to the object side surface of the third shielding element P3 on the optical axis are different. The above parameters of Example 1 and Example 2 and the following parameters: the outer diameter D1s of the object side surface of the first shielding element P1, the outer diameter D1m of the image side surface of the first shielding element P1, the inner diameter d1s of the object side surface of the first shielding element P1, the inner diameter d1m of the image side surface of the first shielding element P1, the inner diameter d0s of the object side end surface of the lens barrel P0, the inner diameter d0m of the image side end surface of the lens barrel P0, the maximum thickness CP1 of the first shielding element P1 along the optical axis, the distance EP01 from the object side end surface of the lens barrel P0 to the object side surface of the first shielding element P1 on the optical axis, the distance EP12 from the image side surface of the first shielding element P1 to the object side surface of the second shielding element P2 on the optical axis, and the maximum height L of the lens barrel P0 along the optical axis are respectively shown in Table 9. And, some of the above parameters are shown in the structural diagram of the optical lens as shown in FIG. Figure 1 shown.

[0086] Figure 8 The axial chromatic aberration curves of the optical lenses of Example 1 and Example 2 are shown, which indicate the deviation of the convergent focus of light rays of different wavelengths passing through the lens. Fig. 9 Astigmatism curves of the optical lenses of Example 1 and Example 2 are shown, which represent meridional field curvature and sagittal field curvature. Fig.10 The distortion curves of the optical lenses of Example 1 and Example 2 are shown, which represent the distortion values ​​corresponding to different half-viewing angles. Figures 8 to 10 It can be seen that the optical lenses provided in Example 1 and Example 2 can achieve good imaging quality.

[0087] Example 3

[0088] The following reference Fig.11 The optical lens according to Embodiment 3 of the present application is described. In this embodiment and the following embodiments, for the sake of brevity, some descriptions similar to Embodiment 1 will be omitted.

[0089] like Fig.11As shown, in this embodiment, the optical lens comprises 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 in sequence from the object side to the image side along the optical axis, wherein the fourth lens E4 and the fifth lens E5 are cemented to form a doublet lens; the outer diameter of the object side end surface of the lens barrel P0 is greater than the outer diameter of the image side end surface thereof.

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

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

[0092] Table 3 shows the basic parameters of the optical lens of Example 3, wherein the units of the radius of curvature and thickness / distance are both in millimeters (mm). Table 4 shows the high-order coefficients A4, A6, A8 and A9 that can be used for each aspherical mirror surface S3 to S9 in Example 3. 10 , wherein each aspheric surface shape can be defined by the formula (1) given in the above embodiment 1.

[0093]

[0094] Table 3

[0095] Face 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 reference Fig.12 Describe the optical lens according to Example 4 of the present application.

[0099] like Fig.12As shown, in this embodiment, the optical lens comprises 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 in sequence from the object side to the image side along the optical axis, wherein the fourth lens E4 and the fifth lens E5 are cemented to form a double cemented lens; the outer diameter of the object side end surface of the lens barrel P0 is greater than the outer diameter of the image side end surface thereof. The optical lens further comprises a plurality of shielding elements, wherein the first shielding element P1 is located between the first lens E1 and the second lens E2 and is in direct contact with the image side surface of the first lens E1; the second shielding element P2 is located between the second lens E2 and the third lens E3 and is in direct contact with the image side surface of the second lens E2; the third shielding element P3 is located between the third lens E3 and the fourth lens E4 and is in direct contact with the image side surface of the third lens E3.

[0100] The structure of the optical lens of this embodiment is the same as that of the optical lens of Embodiment 3, that is, the basic parameter table of the optical lens of this embodiment is the same as Table 3, and the high-order coefficient table of the aspherical mirror surface is the same as Table 4.

[0101] The difference between this embodiment and the third embodiment is that the lens barrel P0 and the partial structural dimensions of the shielding elements P1, P2 and P3 are different. For example, the parameters such as the outer diameter D1s of the object side surface of the first shielding element P1, the outer diameter D1m of the image side surface of the first shielding element P1, the inner diameter d1s of the object side surface of the first shielding element P1, the inner diameter d1m of the image side surface of the first shielding element P1, the outer diameter D3s of the object side surface of the third shielding element P3, the outer diameter D3m of the image side surface of the third shielding element P3, the inner diameter d3s of the object side surface of the third shielding element P3, the inner diameter d3m of the image side surface of the third shielding element P3, the inner diameter d0s of the object side end surface of the lens barrel P0, and the inner diameter d0m of the image side end surface of the lens barrel P0 are different. The above parameters of Example 1 and Example 2 and the following parameters: the outer diameter D2s of the object side surface of the second shielding element P2, the outer diameter D2m of the image side surface of the second shielding element P2, the inner diameter d2s of the object side surface of the second shielding element P2, the inner diameter d2m of the image side surface of the second shielding element P2, the maximum thickness CP1 of the first shielding element P1 along the optical axis, the maximum thickness CP2 of the second shielding element P2 along the optical axis, the maximum thickness CP3 of the third shielding element P3 along the optical axis, the distance EP01 from the object side end surface of the lens barrel P0 to the object side surface of the first shielding element P1 on the optical axis, the distance EP12 from the image side surface of the first shielding element P1 to the object side surface of the second shielding element P2 on the optical axis, the distance EP23 from the image side surface of the second shielding element P2 to the object side surface of the third shielding element P3 on the optical axis, and the maximum height L of the lens barrel P0 along the optical axis are respectively as shown in Table 9. Also, some of the above parameters are schematically shown in the structural diagram of the optical lens as shown in FIG. Figure 1 shown.

[0102] Fig.13The axial chromatic aberration curves of the optical lenses of Example 3 and Example 4 are shown, which indicate the deviation of the convergent focus of light rays of different wavelengths passing through the back of the lens. Fig.14 Astigmatism curves of the optical lenses of Examples 3 and 4 are shown, which represent meridional field curvature and sagittal field curvature. Fig.15 The distortion curves of the optical lenses of Example 3 and Example 4 are shown, which represent the distortion values ​​corresponding to different half-viewing angles. Figures 13 to 15 It can be seen that the optical lenses provided in Examples 3 and 4 can achieve good imaging quality.

[0103] Example 5

[0104] The following reference Fig.16 Describe the optical lens according to Example 5 of the present application.

[0105] like Fig.16 As shown, in this embodiment, the optical lens comprises 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 in sequence from the object side to the image side along the optical axis, wherein the fourth lens E4 and the fifth lens E5 are cemented to form a doublet lens; the outer diameter of the object side end surface of the lens barrel P0 is greater than the outer diameter of the image side end surface thereof.

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

[0107] In this embodiment, the first lens E1 has negative power, its object side surface S1 is convex, and its image side surface S2 is concave. The second lens E2 has negative power, its object side surface S3 is concave, and its image side surface S4 is concave. The third lens E3 has positive power, its object side surface S5 is convex, and its image side surface S6 is concave. The fourth lens E4 has positive power, its object side surface S7 is convex, and its image side surface S8 is convex. The fifth lens E5 has negative 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, wherein the units of the radius of curvature and thickness / distance are both millimeters (mm). Table 6 shows the high-order coefficients A4, A6, A8, A9, A10, A11, A12, A13, A14, A15, A16, A17, A18, A19, A20, A21, A22, A23, A24, A25, A26, A27, A28, A29, A30, A31, A32, A33, A34, A35, A36, A37, A38, A39, A40, A41, A42, A43, A44, A45, A46, A47, A48, A49, A50, A51, A52, A53, A54, A55, A56, A57, A58 10 , A 12 , A 14 and A 16, wherein each aspheric surface shape can be defined by the formula (1) given in the above embodiment 1.

[0109]

[0110]

[0111] Table 5

[0112] Face 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 reference Fig.17 Describe the optical lens according to Example 6 of the present application.

[0116] like Fig.17 As shown, in this embodiment, the optical lens comprises 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 in sequence from the object side to the image side along the optical axis, wherein the fourth lens E4 and the fifth lens E5 are cemented to form a double cemented lens; the outer diameter of the object side end surface of the lens barrel P0 is greater than the outer diameter of the image side end surface thereof. The optical lens further comprises a plurality of shielding elements, wherein the first shielding element P1 is located between the first lens E1 and the second lens E2 and is in direct contact with the image side surface of the first lens E1; the second shielding element P2 is located between the second lens E2 and the third lens E3 and is in direct contact with the image side surface of the second lens E2; the third shielding element P3 is located between the third lens E3 and the fourth lens E4 and is in direct contact with the image side surface of the third lens E3.

[0117] The structure of the optical lens of this embodiment is the same as that of the optical lens of Embodiment 5, that is, the basic parameter table of the optical lens of this embodiment is the same as Table 5, and the high-order coefficient table of the aspherical mirror surface is the same as Table 6.

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

[0119] Fig.18 The axial chromatic aberration curves of the optical lenses of Examples 5 and 6 are shown, which indicate the deviation of the convergent focus of light rays of different wavelengths passing through the lens. Fig.19 Astigmatism curves of the optical lenses of Examples 5 and 6 are shown, which represent meridional field curvature and sagittal field curvature. Fig. 20 The distortion curves of the optical lenses of Example 5 and Example 6 are shown, which represent the distortion values ​​corresponding to different half-viewing angles. Figures 18 to 20 It can be seen that the optical lenses provided in Examples 5 and 6 can achieve good imaging quality.

[0120] Example 7

[0121] The following reference Fig.21 Describe the optical lens according to Example 7 of the present application.

[0122] like Fig.21As shown, in this embodiment, the optical lens comprises 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 in sequence from the object side to the image side along the optical axis, wherein the fourth lens E4 and the fifth lens E5 are cemented to form a doublet lens; the outer diameter of the object side end surface of the lens barrel P0 is greater than the outer diameter of the image side end surface thereof.

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

[0124] In this embodiment, the first lens E1 has negative power, its object side surface S1 is convex, and its image side surface S2 is concave. The second lens E2 has negative power, its object side surface S3 is convex, and its image side surface S4 is concave. The third lens E3 has positive power, its object side surface S5 is concave, and its image side surface S6 is convex. The fourth lens E4 has negative power, its object side surface S7 is convex, and its image side surface S8 is concave. The fifth lens E5 has positive 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, wherein the units of the radius of curvature and thickness / distance are both millimeters (mm). Table 8 shows the high-order coefficients A4, A6, A8, A9, A10, A11, A12, A13, A14, A15, A16, A17, A18, A19, A20, A21, A22, A23, A24, A25, A26 10 , A 12 , A 14 and A 16 , wherein each aspheric surface shape can be defined by the formula (1) given in the above embodiment 1.

[0126]

[0127] Table 7

[0128] Face 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 reference Fig. 22 Describe the optical lens according to Example 8 of the present application.

[0132] like Fig. 22As shown, in this embodiment, the optical lens comprises 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 in sequence from the object side to the image side along the optical axis, wherein the fourth lens E4 and the fifth lens E5 are cemented to form a double cemented lens; the outer diameter of the object side end surface of the lens barrel P0 is greater than the outer diameter of the image side end surface thereof. The optical lens further comprises a plurality of shielding elements, wherein the first shielding element P1 is located between the first lens E1 and the second lens E2 and is in direct contact with the image side surface of the first lens E1; the second shielding element P2 is located between the second lens E2 and the third lens E3 and is in direct contact with the image side surface of the second lens E2; the third shielding element P3 is located between the third lens E3 and the fourth lens E4 and is in direct contact with the image side surface of the third lens E3.

[0133] The structure of the optical lens of this embodiment is the same as that of the optical lens of Example 7, that is, the basic parameter table of the optical lens of this embodiment is the same as Table 7, and the high-order coefficient table of the aspherical mirror surface is the same as Table 8.

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

[0135] Fig.23The axial chromatic aberration curves of the optical lenses of Example 7 and Example 8 are shown, which indicate the deviation of the convergent focus of light rays of different wavelengths passing through the back of the lens. Fig.24 Astigmatism curves of the optical lenses of Examples 7 and 8 are shown, which represent meridional image curvature and sagittal image curvature. Fig.25 The distortion curves of the optical lenses of Example 7 and Example 8 are shown, which represent the distortion values ​​corresponding to different half-viewing angles. Figure 23 to Figure 25 It can be seen that the optical lenses provided in Examples 7 and 8 can achieve good imaging quality.

[0136]

[0137]

[0138] Table 9

[0139] In addition, 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 as shown in Table 10.

[0140] Parameters / Examples 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 satisfy the conditions shown in Table 11, respectively.

[0143] Conditional / Example 1 2 3 4 5 6 7 8 R1×(D1s / d1s) / EP01 12.67 12.67 17.73 17.72 17.55 17.55 14.04 8.17 |f2×(D1m-D2s) / (EP12×CT2)| 23.52 17.35 15.26 15.29 10.33 13.90 29.94 15.64 |R3|×CP1 / [(d1m-d2s)×R4] 0.66 0.39 0.39 0.39 0.15 0.19 0.01 1.89 |CP2×T23+CP1×T12| / f12(mm) -1.20 -0.05 -0.04 -0.04 -0.05 -1.61 -0.03 -1.14 R1×(d0s-d1s) / |f1|(mm) 6.68 6.68 9.69 9.70 5.20 5.20 10.01 9.71 d2m×f3 / |(D2m-d2m)×R5| 2.07 1.29 0.80 0.80 1.47 2.12 1.36 1.36 (D3s / d0m)×(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 <![CDATA[D3s / |CP3×R6|+D3m / |CP3×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)×L / (d0s+d0m)×Fno 7.31 7.31 5.42 5.42 9.09 9.08 5.00 5.00

[0144] Table 11

[0145] The present application also provides an imaging device, which is provided with an electronic photosensitive element for imaging, and the electronic photosensitive element can be a charge coupled device (CCD) or a complementary metal oxide semiconductor (CMOS). The imaging device can 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 imaging device is equipped with the optical lens described above.

[0146] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of protection involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the concept of the present application. For example, the above features are replaced with the technical features with similar functions disclosed in the present application (but not limited to) to form a technical solution.

Claims

1. An optical lens, comprising a lens barrel, a lens group contained in the lens barrel, and at least one shielding element, The lens group includes a first lens, a second lens, a third lens, a fourth lens and a fifth lens arranged in sequence 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 and the fifth lens are cemented together; The at least one shielding element includes a third shielding element 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 thereof; and The optical lens meets the following requirements: 5.0≤Tan(Semi-FOV)×L / (d0s+d0m)×Fno<9.5, Among them, 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 surface of the lens barrel, d0m is the inner diameter of the image side end surface of the lens barrel, and Fno is the relative F number of the optical lens.

2. The optical lens according to claim 1, characterized in that: The at least one shielding element further comprises a first shielding element located between the first lens and the second lens and in contact with the image side surface of the first lens; 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 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: 8.0 <R1×(D1s / d1s) / EP01<18.0。 3. The optical lens according to claim 1, characterized in that: The at least one shielding element further includes: a first shielding 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 shielding 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 shielding element, the outer diameter D2s of the object side surface of the second shielding element, the distance EP12 from the image side surface of the first shielding element to the object side surface of the second shielding element on the optical axis, and the center thickness CT2 of the second lens on the optical axis satisfy: 10.0<|f2×(D1m-D2s) / (EP12×CT2)|<30.

0.

4. The optical lens according to claim 1, characterized in that: The at least one shielding element further includes: a first shielding 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 shielding element located between the second lens and the third lens and in contact with the image side surface of the second lens; The curvature radius 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 curvature radius R4 of the image side surface of the second lens satisfy: 0.0<|R3|×CP1 / [(d1m-d2s)×R4]<2.

0.

5. The optical lens according to claim 1, characterized in that: The at least one shielding element further includes: a first shielding 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 shielding 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 shielding element along the optical axis, the air interval 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, the air interval 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 satisfy: -2.0mm<|CP2×T23+CP1×T12| / f12<0.0mm.

6. The optical lens according to claim 1, characterized in that: The at least one shielding element further comprises a first shielding element located between the first lens and the second lens and in contact with the image side surface of the first lens; The curvature radius R1 of the object side surface of the first lens, the inner diameter d1s of the object side surface of the first shielding element, and the effective focal length f1 of the first lens satisfy: 5.0mm <R1×(d0s-d1s) / |f1|<11.0mm。 7. The optical lens according to claim 1, characterized in that: The at least one shielding element further comprises a second shielding 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 curvature radius R5 of the object side surface of the third lens satisfy: 0.5 <d2m×f3 / |(D2m-d2m)×R5|<2.5。 8. The optical lens according to any one of claims 1 to 7, characterized in that: The at least one shielding element further comprises a second shielding 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 from the image side surface of the second blocking element to 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 curvature radius R3 of the object side surface of the second lens, and the curvature radius R5 of the object side surface of the third lens satisfy: 1.0 <EP23 / (f2+f3)+|R3 / R5|<16.0。 9. The optical lens according to any one of claims 1 to 7, characterized in that: 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 curvature radius 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 curvature radius R7 of the object side surface of the fourth lens satisfy: 5.0mm -1 <D3s / |CP3×R6|+D3m / |CP3×R7|<320.0mm -1 。 10. The optical lens according to any one of claims 1 to 7, characterized in that: 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 shielding 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 shielding element satisfy: 0 <f45 / d3m-f34 / d3s<5.0。

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