Optical lens group

Abstract

This application discloses an optical lens group, which comprises six lenses with optical power, sequentially including lenses one through six along the optical axis from the object side to the image side. The first lens has negative optical power; the second lens has optical power; the third lens has optical power and its image-side surface is convex; the fourth lens has optical power and its image-side surface is concave; the fifth lens has positive optical power and its image-side surface is convex; the sixth lens has optical power, its object-side surface is convex, and its image-side surface is concave; both the fourth and sixth lenses have negative optical power, and at least one of the second and third lenses has positive optical power; or, both the second and third lenses have positive optical power, and at least one of the fourth and sixth lenses has negative optical power; the spacing distances T23, T34, and T45 along the optical axis of the second and third lenses, the third and fourth lenses, and the fourth and fifth lenses, respectively, satisfy 0 < (T23 + T34) / T45 < 0.5; the effective focal length f1 of the first lens and the total effective focal length f of the optical lens group satisfy -5 < f1 / f < -2.5.

Description

[0001] Divisional application statement

[0002] This application is a divisional application of Chinese invention patent application filed on January 22, 2019, entitled "Optical Lens Group" and with application number 201910056968.9. Technical Field

[0003] This application relates to an optical lens assembly, and more specifically, to an optical lens assembly comprising six lenses. Background Technology

[0004] In recent years, with the development of technology, portable electronic products have gradually emerged, especially those with high-performance camera functions, which have become increasingly popular in the market. Generally, the photosensitive elements of optical systems are divided into two types: photocoupled devices (CCD) or complementary metal-oxide-semiconductor devices (CMOS). With the advancement of semiconductor manufacturing technology, the pixel size of chips is becoming smaller and smaller, which places increasingly higher demands on the imaging quality of the corresponding optical systems.

[0005] Wide-angle lenses can capture clear images of a wide range of scenes and, compared to other types of lenses, can capture more information under the same conditions (e.g., the same focal length). At the same time, there is increasing market interest in lenses with smaller head sizes. Summary of the Invention

[0006] This application provides an optical lens assembly suitable for portable electronic products that can at least solve or partially solve at least one of the above-mentioned disadvantages in the prior art, for example, an optical lens assembly with wide-angle characteristics.

[0007] On one hand, this application provides an optical lens group comprising, along the optical axis from the object side to the image side, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens in that order. The first lens has negative optical power; the second lens has optical power; the third lens has optical power and its image-side surface is convex; the fourth lens has optical power and its image-side surface is concave; the fifth lens has positive optical power and its image-side surface is convex; and the sixth lens has optical power, its object-side surface is convex, and its image-side surface is concave. The combined focal length f23 of the second and third lenses and the total effective focal length f of the optical lens group satisfy 0.8 < f23 / f < 1.3.

[0008] In one embodiment, the effective focal length f1 of the first lens and the total effective focal length f of the optical lens group can satisfy -5 < f1 / f < -2.5.

[0009] In one embodiment, half the diagonal length of the effective pixel area on the imaging surface of the optical lens group, ImgH, and the total effective focal length f of the optical lens group can satisfy ImgH / f > 1.1.

[0010] In one embodiment, the radius of curvature R10 of the image-side surface of the fifth lens and the effective focal length f5 of the fifth lens can satisfy -0.7 < R10 / f5 < -0.2.

[0011] In one embodiment, the radius of curvature R12 of the image side of the sixth lens and the center thickness CT6 of the sixth lens on the optical axis can satisfy 1 < R12 / CT6 < 1.5.

[0012] In one embodiment, the center thickness CT2 of the second lens on the optical axis and the center thickness CT5 of the fifth lens on the optical axis can satisfy 0.1 < CT2 / CT5 < 0.6.

[0013] In one embodiment, the effective radius DT11 of the object side of the first lens and the distance TTL between the object side of the first lens and the imaging surface of the optical lens group on the optical axis can satisfy DT11 / TTL < 0.3.

[0014] In one embodiment, the effective radius DT11 of the object side of the first lens and the effective radius DT32 of the image side of the third lens can satisfy 0.7 < DT11 / DT32 < 1.

[0015] In one embodiment, the effective radius DT11 of the object side of the first lens and the effective radius DT62 of the image side of the sixth lens can satisfy 0.2 < DT11 / DT62 < 0.5.

[0016] In one embodiment, the on-axis distance SAG52 between the intersection of the image-side surface of the fifth lens and the optical axis and the vertex of the maximum effective radius of the image-side surface of the fifth lens and the center thickness CT5 of the fifth lens on the optical axis can satisfy -0.8 < SAG52 / CT5 < -0.5.

[0017] In one embodiment, the optical axis spacing distances T23 between the second and third lenses, T34 between the third and fourth lenses, and T45 between the fourth and fifth lenses can satisfy 0 < (T23 + T34) / T45 < 0.5.

[0018] In one embodiment, the sum of the center thicknesses of the first to sixth lenses on the optical axis, ∑CT, and the distance TD between the object side of the first lens and the image side of the sixth lens on the optical axis can satisfy 0.5 < ∑CT / TD < 0.9.

[0019] In one embodiment, the optical lens group further includes an aperture stop, and the distance SD between the aperture stop and the image side of the sixth lens on the optical axis and the distance TTL between the object side of the first lens and the imaging surface of the optical lens group on the optical axis can satisfy 0.5 < SD / TTL < 0.8.

[0020] In one embodiment, the distance Tr3r8 between the object side of the second lens and the image side of the fourth lens on the optical axis and the distance Tr9r12 between the object side of the fifth lens and the image side of the sixth lens on the optical axis can satisfy 0.5 < Tr3r8 / Tr9r12 < 1.

[0021] In one embodiment, the edge thicknesses ET2 of the second lens, ET3 of the third lens, ET4 of the fourth lens, and ET5 of the fifth lens can satisfy |ET2-(ET3+ET4+ET5) / 3|<0.15mm.

[0022] On the other hand, this application provides an optical lens assembly comprising, sequentially from the object side to the image side along the optical axis: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens. The first lens has negative optical power; the second lens has optical power; the third lens has optical power and its image-side surface is convex; the fourth lens has optical power and its image-side surface is concave; the fifth lens has positive optical power and its image-side surface is convex; the sixth lens has optical power, its object side surface is convex, and its image-side surface is concave. The radius of curvature R12 of the image-side surface of the sixth lens and its center thickness CT6 along the optical axis satisfy 1 < R12 / CT6 < 1.5.

[0023] On another front, this application provides an optical lens assembly comprising, sequentially from the object side to the image side along the optical axis, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens. The first lens has negative optical power; the second lens has optical power; the third lens has optical power and its image-side surface is convex; the fourth lens has optical power and its image-side surface is concave; the fifth lens has positive optical power and its image-side surface is convex; the sixth lens has optical power, its object-side surface is convex, and its image-side surface is concave. The effective radius DT11 of the object-side surface of the first lens and the distance TTL between the object-side surface of the first lens and the imaging surface of the optical lens assembly along the optical axis satisfy DT11 / TTL < 0.3.

[0024] On another front, this application provides an optical lens assembly comprising, sequentially from the object side to the image side along the optical axis: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens. The first lens has negative optical power; the second lens has optical power; the third lens has optical power and its image-side surface is convex; the fourth lens has optical power and its image-side surface is concave; the fifth lens has positive optical power and its image-side surface is convex; the sixth lens has optical power, its object-side surface is convex, and its image-side surface is concave. The effective radius DT11 of the object-side surface of the first lens and the effective radius DT32 of the image-side surface of the third lens satisfy 0.7 < DT11 / DT32 < 1.

[0025] On another front, this application provides an optical lens assembly comprising, sequentially from the object side to the image side along the optical axis: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens. The first lens has negative optical power; the second lens has optical power; the third lens has optical power and its image-side surface is convex; the fourth lens has optical power and its image-side surface is concave; the fifth lens has positive optical power and its image-side surface is convex; the sixth lens has optical power, its object-side surface is convex, and its image-side surface is concave. The effective radius DT11 of the object-side surface of the first lens and the effective radius DT62 of the image-side surface of the sixth lens satisfy 0.2 < DT11 / DT62 < 0.5.

[0026] On another front, this application provides an optical lens assembly comprising, sequentially from the object side to the image side along the optical axis, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens. The first lens has negative optical power; the second lens has optical power; the third lens has optical power and its image-side surface is convex; the fourth lens has optical power and its image-side surface is concave; the fifth lens has positive optical power and its image-side surface is convex; the sixth lens has optical power, its object side surface is convex, and its image-side surface is concave. The axial distance SAG52 between the intersection of the image-side surface of the fifth lens and the optical axis and the vertex of the maximum effective radius of the image-side surface of the fifth lens, and the center thickness CT5 of the fifth lens along the optical axis, satisfy -0.8 < SAG52 / CT5 < -0.5.

[0027] On another front, this application provides an optical lens assembly comprising, sequentially from the object side to the image side along the optical axis: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens. The first lens has negative optical power; the second lens has optical power; the third lens has optical power and its image-side surface is convex; the fourth lens has optical power and its image-side surface is concave; the fifth lens has positive optical power and its image-side surface is convex; the sixth lens has optical power, its object-side surface is convex, and its image-side surface is concave. The edge thicknesses ET2 of the second lens, ET3 of the third lens, ET4 of the fourth lens, and ET5 of the fifth lens satisfy |ET2-(ET3+ET4+ET5) / 3|<0.15mm.

[0028] This application employs multiple (e.g., six) lenses. By rationally allocating the optical power, surface shape, center thickness of each lens, and on-axis spacing between each lens, the aforementioned optical lens group achieves at least one beneficial effect such as wide-angle, small size, and small head size. Attached Figure Description

[0029] 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:

[0030] Figure 1 A schematic diagram of the optical lens assembly according to Embodiment 1 of this application is shown;

[0031] Figures 2A to 2D The on-axis chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of the optical lens group of Example 1 are shown respectively.

[0032] Figure 3 A schematic diagram of the optical lens assembly according to Embodiment 2 of this application is shown;

[0033] Figures 4A to 4D The on-axis chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of the optical lens group of Example 2 are shown respectively.

[0034] Figure 5 A schematic diagram of the optical lens assembly according to Embodiment 3 of this application is shown;

[0035] Figures 6A to 6D The on-axis chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of the optical lens group of Example 3 are shown respectively.

[0036] Figure 7 A schematic diagram of the optical lens assembly according to Embodiment 4 of this application is shown;

[0037] Figures 8A to 8DThe on-axis chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of the optical lens group of Example 4 are shown respectively.

[0038] Figure 9 A schematic diagram of the optical lens assembly according to Embodiment 5 of this application is shown;

[0039] Figures 10A to 10D The on-axis chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of the optical lens group of Example 5 are shown respectively.

[0040] Figure 11 A schematic diagram of the optical lens assembly according to Embodiment 6 of this application is shown;

[0041] Figures 12A to 12D The on-axis chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of the optical lens group of Example 6 are shown respectively.

[0042] Figure 13 A schematic diagram of the optical lens assembly according to Embodiment 7 of this application is shown;

[0043] Figures 14A to 14D The on-axis chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of the optical lens group of Example 7 are shown respectively.

[0044] Figure 15 A schematic diagram of the optical lens assembly according to Embodiment 8 of this application is shown;

[0045] Figures 16A to 16D The on-axis chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of the optical lens group of Example 8 are shown respectively.

[0046] Figure 17 A schematic diagram of the optical lens assembly according to Embodiment 9 of this application is shown;

[0047] Figures 18A to 18D The on-axis chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of the optical lens group of Example 9 are shown respectively.

[0048] Figure 19 A schematic diagram of the structure of the optical lens group according to Embodiment 10 of this application is shown;

[0049] Figures 20A to 20D The on-axis chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of the optical lens group of Example 10 are shown respectively.

[0050] Figure 21 A schematic diagram of the structure of the optical lens group according to Embodiment 11 of this application is shown;

[0051] Figures 22A to 22D The on-axis chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of the optical lens group of Example 11 are shown respectively. Detailed Implementation

[0052] 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.

[0053] 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.

[0054] 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.

[0055] 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 of each lens closest to the object side is called the object-side surface of the lens, and the surface of each lens closest to the image side is called the image-side surface of the lens.

[0056] 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.

[0057] 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 the meaning consistent with their meaning in the context of the relevant art and shall not be interpreted in an idealized or overly formal sense unless expressly so specified herein.

[0058] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0059] The features, principles and other aspects of this application are described in detail below.

[0060] An optical lens assembly according to an exemplary embodiment of this application may include, for example, six lenses with optical power, namely, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens. These six lenses are arranged sequentially along the optical axis from the object side to the image side, and each adjacent lens may have an air gap.

[0061] In an exemplary embodiment, the first lens may have negative optical power; the second lens may have positive or negative optical power; the third lens may have positive or negative optical power, and its image-side surface may be convex; the fourth lens may have positive or negative optical power, and its image-side surface may be concave; the fifth lens may have positive optical power, and its image-side surface may be convex; the sixth lens may have positive or negative optical power, its object-side surface may be convex, and its image-side surface may be concave. Designing the fifth lens to have positive optical power and its image-side surface to be convex can effectively correct the aberrations generated by the first lens and improve system performance.

[0062] In an exemplary embodiment, the optical lens group of this application can satisfy the condition -5 < f1 / f < -2.5, where f1 is the effective focal length of the first lens and f is the total effective focal length of the optical lens group. More specifically, f1 and f can further satisfy -4.24 ≤ f1 / f ≤ -2.54.

[0063] In an exemplary embodiment, the optical lens group of this application can satisfy the condition ImgH / f > 1.1, where ImgH is half the diagonal length of the effective pixel area on the imaging plane of the optical lens group, and f is the total effective focal length of the optical lens group. More specifically, ImgH and f can further satisfy 1.1 < ImgH / f < 1.5, for example, 1.20 ≤ ImgH / f ≤ 1.24. By reasonably setting the ratio of ImgH and f, the optical lens group can be ensured to have the characteristics of being thin and light, as well as having a wide angle, to meet the field of view requirements of portable electronic products.

[0064] In an exemplary embodiment, the optical lens group of this application can satisfy the condition 0.8 < f23 / f < 1.3, where f23 is the combined focal length of the second and third lenses, and f is the total effective focal length of the optical lens group. More specifically, f23 and f can further satisfy 0.91 ≤ f23 / f ≤ 1.21. By reasonably setting the combined focal length of the second and third lenses, the field curvature of the optical lens group can be effectively balanced, and the size of the optical lens group can be effectively controlled, achieving miniaturization.

[0065] In an exemplary embodiment, the optical lens group of this application can satisfy the condition -0.7 < R10 / f5 < -0.2, where R10 is the radius of curvature of the image-side surface of the fifth lens, and f5 is the effective focal length of the fifth lens. More specifically, R10 and f5 can further satisfy -0.55 ≤ R10 / f5 ≤ -0.31. Reasonably controlling the radius of curvature of the image-side surface of the fifth lens can effectively balance the astigmatism of the optical lens group, shorten the back focal length of the lens group, and further ensure the miniaturization of the optical lens group.

[0066] In an exemplary embodiment, the optical lens group of this application can satisfy the condition 1 < R12 / CT6 < 1.5, where R12 is the radius of curvature of the image-side surface of the sixth lens, and CT6 is the center thickness of the sixth lens on the optical axis. More specifically, R12 and CT6 can further satisfy 1.32 ≤ R12 / CT6 ≤ 1.45. Reasonably controlling the ratio of the radius of curvature of the image-side surface of the sixth lens to the center thickness of the sixth lens on the optical axis can effectively reduce the rear-end size of the lens group, avoid excessive volume of the optical lens group, and also facilitate lens assembly and achieve higher space utilization.

[0067] In an exemplary embodiment, the optical lens group of this application can satisfy the condition 0 < (T23 + T34) / T45 < 0.5, where T23 is the distance between the second and third lenses on the optical axis, T34 is the distance between the third and fourth lenses on the optical axis, and T45 is the distance between the fourth and fifth lenses on the optical axis. More specifically, T23, T34, and T45 can further satisfy 0.18 ≤ (T23 + T34) / T45 ≤ 0.45. By reasonably allocating the ratio of the sum of the distances between the second and third lenses on the optical axis (T23) and the distances between the third and fourth lenses on the optical axis (T34) to the distance between the fourth and fifth lenses on the optical axis (T45), sufficient spacing space is provided between the lenses, thereby increasing the degree of freedom in lens surface variations and improving the system's ability to correct astigmatism and field curvature.

[0068] In an exemplary embodiment, the optical lens group of this application can satisfy the condition 0.5 < ∑CT / TD < 0.9, where ∑CT is the sum of the center thicknesses of the first lens to the sixth lens on the optical axis, and TD is the distance between the object-side surface of the first lens and the image-side surface of the sixth lens on the optical axis. More specifically, ∑CT and TD can further satisfy 0.76 ≤ ∑CT / TD ≤ 0.81. Reasonably controlling the ratio of ∑CT and TD can ensure that the spacing between the lenses is relatively balanced and improve space utilization; at the same time, it can improve the aberration correction capability of the system while ensuring lens miniaturization.

[0069] In an exemplary embodiment, the optical lens group of this application can satisfy the condition 0.1 < CT2 / CT5 < 0.6, where CT2 is the center thickness of the second lens on the optical axis, and CT5 is the center thickness of the fifth lens on the optical axis. More specifically, CT2 and CT5 can further satisfy 0.20 ≤ CT2 / CT5 ≤ 0.52. Reasonably allocating the center thicknesses of the second and fifth lenses can effectively reduce the rear-end size of the system to ensure lens miniaturization and also facilitate lens assembly.

[0070] In an exemplary embodiment, the optical lens group may further include at least one aperture stop to improve the image quality of the lens. Optionally, the aperture stop may be disposed between the first lens and the second lens.

[0071] In an exemplary embodiment, the optical lens group of this application can satisfy the condition 0.5 < SD / TTL < 0.8, where SD is the distance on the optical axis between the aperture stop and the image-side surface of the sixth lens, and TTL is the distance on the optical axis between the object-side surface of the first lens and the imaging surface of the optical lens group. More specifically, SD and TTL can further satisfy 0.63 ≤ SD / TTL ≤ 0.70. Reasonably controlling the ratio of SD to TTL helps to appropriately shorten the overall length of the optical lens group, meeting the requirements for thinness and lightness.

[0072] In an exemplary embodiment, the optical lens group of this application can satisfy the condition 0.5 < Tr3r8 / Tr9r12 < 1, where Tr3r8 is the distance on the optical axis between the object-side surface of the second lens and the image-side surface of the fourth lens, and Tr9r12 is the distance on the optical axis between the object-side surface of the fifth lens and the image-side surface of the sixth lens. More specifically, Tr3r8 and Tr9r12 can further satisfy 0.58 ≤ Tr3r8 / Tr9r12 ≤ 0.88. By rationally allocating the center thickness and on-axis spacing of each lens from the second to the sixth lens, sufficient spacing space can be provided between adjacent lenses, thereby increasing the degree of freedom in lens surface variations and improving the system's ability to correct astigmatism and field curvature.

[0073] In an exemplary embodiment, the optical lens group of this application can satisfy the condition DT11 / TTL < 0.3, where DT11 is the effective radius of the object-side surface of the first lens, and TTL is the distance on the optical axis between the object-side surface of the first lens and the imaging surface of the optical lens group. More specifically, DT11 and TTL can further satisfy 0.1 < DT11 / TTL < 0.2, for example, 0.15 ≤ DT11 / TTL ≤ 0.18. By reasonably controlling the effective radius of the object-side surface of the first lens, the front end size of the lens group can be effectively reduced, giving the optical lens group a small head.

[0074] In an exemplary embodiment, the optical lens group of this application can satisfy the condition |ET2-(ET3+ET4+ET5) / 3|<0.15mm, where ET2 is the edge thickness of the second lens, ET3 is the edge thickness of the third lens, ET4 is the edge thickness of the fourth lens, and ET5 is the edge thickness of the fifth lens. More specifically, ET2, ET3, ET4, and ET5 can further satisfy 0.00mm≤|ET2-(ET3+ET4+ET5) / 3|≤0.13mm. Reasonably controlling the edge thicknesses of the second, third, fourth, and fifth lenses helps to effectively reduce the overall system length while meeting the requirements for lens manufacturability, thus enabling the system to achieve a thin and light design.

[0075] In an exemplary embodiment, the optical lens group of this application can satisfy the condition 0.7 < DT11 / DT32 < 1, where DT11 is the effective radius of the object-side surface of the first lens, and DT32 is the effective radius of the image-side surface of the third lens. More specifically, DT11 and DT32 can further satisfy 0.79 ≤ DT11 / DT32 ≤ 0.96. Reasonably controlling the ratio of the effective radius of the object-side surface of the first lens to the effective radius of the image-side surface of the third lens helps to improve the light-converging ability of the optical lens group, adjust the light focusing position, shorten the overall system length, and ensure the miniaturization characteristics of the optical lens group.

[0076] In an exemplary embodiment, the optical lens group of this application can satisfy the condition 0.2 < DT11 / DT62 < 0.5, where DT11 is the effective radius of the object-side surface of the first lens, and DT62 is the effective radius of the image-side surface of the sixth lens. More specifically, DT11 and DT62 can further satisfy 0.35 ≤ DT11 / DT62 ≤ 0.41. Reasonably controlling the ratio of the effective radius of the object-side surface of the first lens to the effective radius of the image-side surface of the sixth lens helps to improve the field of view of the optical lens group, achieving wide-angle characteristics. Furthermore, it can also improve the light-gathering ability, adjust the light-focusing position, and shorten the overall system length.

[0077] In an exemplary embodiment, the optical lens group of this application can satisfy the condition -0.8 < SAG52 / CT5 < -0.5, where SAG52 is the axial distance between the intersection of the image-side surface of the fifth lens and the optical axis and the vertex of the maximum effective radius of the image-side surface of the fifth lens, and CT5 is the center thickness of the fifth lens on the optical axis. More specifically, SAG52 and CT5 can further satisfy -0.76 ≤ SAG52 / CT5 ≤ -0.61. Reasonably controlling the ratio of SAG52 and CT5 can reasonably control the deflection angle of the principal ray, improve the matching degree with the chip, and facilitate the adjustment of the structure of the optical lens group.

[0078] Optionally, the aforementioned optical lens assembly may also include a filter for correcting color deviation and / or a protective glass for protecting the photosensitive element located on the imaging surface.

[0079] The optical lens group according to the above embodiments of this application can employ multiple lenses, such as the six lenses described above. By rationally allocating the optical power, surface shape, center thickness of each lens, and on-axis spacing between each lens, the size of the lens can be effectively reduced, the sensitivity of the lens can be decreased, and the manufacturability of the lens can be improved, making the optical lens group more conducive to manufacturing and suitable for portable electronic products. The optical lens group configured as described above also has beneficial effects such as wide-angle, small size, and small head size. In addition, the optical lens group configured as described above not only obtains an ideal field of view and good imaging effect, but also makes the subject in a cluttered environment stand out, and has higher imaging quality than similar products in terms of shooting angle range.

[0080] In embodiments of this application, at least one of the mirror surfaces of each lens is an aspherical mirror surface; that is, at least one of the object-side and image-side surfaces of each of the first, second, third, fourth, fifth, and sixth lenses is an aspherical mirror surface. An aspherical lens is characterized by a continuously changing curvature from the lens center to the lens periphery. Unlike a spherical lens, which has a constant curvature from the lens center to the lens periphery, an aspherical lens has better curvature radius characteristics, offering advantages in improving distortion aberrations and astigmatism. By using an aspherical lens, aberrations occurring during imaging can be eliminated as much as possible, thereby improving image quality. Optionally, both the object-side and image-side surfaces of each of the first, second, third, fourth, fifth, and sixth lenses are aspherical mirror surfaces.

[0081] However, those skilled in the art will understand that the number of lenses constituting the optical lens group can be varied to obtain the various results and advantages described herein without departing from the technical solutions claimed in this application. For example, although six lenses are described as an example in the embodiments, the optical lens group is not limited to including six lenses. If desired, the optical lens group may also include other numbers of lenses.

[0082] Specific embodiments of the optical lens group applicable to the above-described embodiments are further described below with reference to the accompanying drawings.

[0083] Example 1

[0084] The following is for reference Figures 1 to 2D The optical lens group according to Embodiment 1 of this application is described. Figure 1 A schematic diagram of the structure of an optical lens assembly according to Embodiment 1 of this application is shown.

[0085] like Figure 1 As shown, the optical lens group according to an exemplary embodiment of this application includes, in sequence along the optical axis from the object side to the image side: a first lens E1, an aperture stop STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7, and an imaging surface S15.

[0086] 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 positive optical power, with its object-side surface S3 being convex and its image-side surface S4 being convex. The third lens E3 has positive optical power, with its object-side surface S5 being concave 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 S9 being concave and its image-side surface S10 being convex. The sixth lens E6 has negative optical power, with its object-side surface S11 being convex and its image-side surface S12 being concave. The filter E7 has an object-side surface S13 and an image-side surface S14. Light from the object passes sequentially through surfaces S1 to S14 and is finally imaged onto the imaging surface S15.

[0087] Table 1 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens in the optical lens group of Example 1, wherein the units for radius of curvature and thickness are millimeters (mm).

[0088]

[0089]

[0090] Table 1

[0091] As shown in Table 1, the object-side surface and image-side surface of any one of the lenses, from the first lens E1 to the sixth lens E6, are aspherical. In this embodiment, the surface shape x of each aspherical lens can be defined using, but is not limited to, the following aspherical formula:

[0092]

[0093] 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 (given in Table 1); Ai is the i-th order correction coefficient of the aspherical surface. Table 2 below gives the higher-order coefficients A4, A6, A8, A12 that can be used for each aspherical mirror S1-S12 in Example 1. 10 A 12 A 14 A 16 A 18 and A 20 .

[0094] Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 4.9080E-01 -8.5780E-01 5.9703E+00 -3.2457E+01 1.2359E+02 -3.0806E+02 4.8225E+02 -4.2792E+02 1.6403E+02 S2 9.6935E-01 -7.4008E+00 1.7051E+02 -2.3507E+03 2.0271E+04 -1.0870E+05 3.5320E+05 -6.3567E+05 4.8691E+05 S3 -3.3679E-03 -5.0008E-01 2.7562E+00 4.4602E+01 -9.4678E+02 7.0207E+03 -2.5523E+04 4.5887E+04 -3.2652E+04 S4 2.7665E-01 -5.6386E+00 4.7927E+01 -3.0542E+02 1.3570E+03 -4.0166E+03 7.5316E+03 -8.0107E+03 3.6432E+03 S5 2.9943E-01 -4.4126E+00 2.5876E+01 -1.0599E+02 3.0315E+02 -5.5955E+02 6.2694E+02 -3.8971E+02 1.0447E+02 S6 2.9190E-01 -2.7206E+00 1.4082E+01 -5.0877E+01 1.2757E+02 -2.0914E+02 2.0689E+02 -1.1007E+02 2.3881E+01 S7 -6.4568E-03 -1.9252E+00 1.1766E+01 -4.3585E+01 1.0630E+02 -1.6633E+02 1.5814E+02 -8.2493E+01 1.8045E+01 S8 -8.6431E-02 -7.3428E-02 1.5648E+00 -6.6710E+00 1.5257E+01 -2.0507E+01 1.6153E+01 -6.8821E+00 1.2212E+00 S9 1.0587E-02 1.6323E-02 -8.2107E-02 8.0422E-01 -2.7488E+00 4.4937E+00 -3.8765E+00 1.7283E+00 -3.1721E-01 S10 -2.8769E-01 5.6791E-01 -1.5992E+00 3.5572E+00 -5.4052E+00 5.4366E+00 -3.4563E+00 1.2542E+00 -1.9582E-01 S11 -1.0859E-01 1.5899E-02 -2.7274E-01 6.1309E-01 -6.9207E-01 4.5773E-01 -1.8062E-01 3.9430E-02 -3.6461E-03 S12 -7.8698E-02 -1.1416E-01 2.0426E-01 -1.7480E-01 9.1575E-02 -3.0600E-02 6.3695E-03 -7.5463E-04 3.8971E-05

[0095] Table 2

[0096] Table 3 gives the total optical length TTL of the optical lens group in Example 1 (i.e., the distance from the center of the object side surface S1 of the first lens E1 to the imaging surface S15 on the optical axis), half the diagonal length of the effective pixel area on the imaging surface S15 of the optical lens group ImgH, the maximum semi-FOV, the total effective focal length f of the optical lens group, and the effective focal lengths f1 to f6 of each lens.

[0097] TTL(mm) 4.48 f2 (mm) 2.47 ImgH(mm) 2.41 f3 (mm) 7.79 Semi-FOV (°) 51.9 f4 (mm) -4.00 f(mm) 1.94 f5 (mm) 1.36 f1(mm) -8.25 f6 (mm) -1.86

[0098] Table 3

[0099] The optical lens group in Example 1 satisfies:

[0100] f1 / f = -4.24, where f1 is the effective focal length of the first lens E1 and f is the total effective focal length of the optical lens group;

[0101] ImgH / f=1.24, where ImgH is half the diagonal length of the effective pixel area on the imaging surface S15 of the optical lens group, and f is the total effective focal length of the optical lens group;

[0102] f23 / f = 1.04, where f23 is the combined focal length of the second lens E2 and the third lens E3, and f is the total effective focal length of the optical lens group;

[0103] R10 / f5=-0.50, where R10 is the radius of curvature of the image-side surface S10 of the fifth lens E5, and f5 is the effective focal length of the fifth lens E5.

[0104] R12 / CT6=1.38, where R12 is the radius of curvature of the image-side surface S12 of the sixth lens E6, and CT6 is the center thickness of the sixth lens E6 on the optical axis.

[0105] (T23+T34) / T45=0.24, where T23 is the distance between the second lens E2 and the third lens E3 on the optical axis, T34 is the distance between the third lens E3 and the fourth lens E4 on the optical axis, and T45 is the distance between the fourth lens E4 and the fifth lens E5 on the optical axis.

[0106] ∑CT / TD=0.70, where ∑CT is the sum of the center thicknesses of the first lens E1 to the sixth lens E6 on the optical axis, and TD is the distance between the object side surface S1 of the first lens E1 and the image side surface S12 of the sixth lens E6 on the optical axis.

[0107] CT2 / CT5 = 0.48, where CT2 is the center thickness of the second lens E2 on the optical axis, and CT5 is the center thickness of the fifth lens E5 on the optical axis;

[0108] SD / TTL = 0.63, where SD is the distance on the optical axis between the aperture stop STO and the image side surface S12 of the sixth lens E6, and TTL is the distance on the optical axis between the object side surface S1 of the first lens E1 and the imaging surface S15 of the optical lens group.

[0109] Tr3r8 / Tr9r12=0.88, where Tr3r8 is the distance on the optical axis between the object side surface S3 of the second lens E2 and the image side surface S8 of the fourth lens E4, and Tr9r12 is the distance on the optical axis between the object side surface S9 of the fifth lens E5 and the image side surface S12 of the sixth lens E6.

[0110] DT11 / TTL=0.16, where DT11 is the effective radius of the object side surface S1 of the first lens E1, and TTL is the distance on the optical axis between the object side surface S1 of the first lens E1 and the imaging surface S15 of the optical lens group.

[0111] |ET2-(ET3+ET4+ET5) / 3|=0.01mm, where ET2 is the edge thickness of the second lens E2, ET3 is the edge thickness of the third lens E3, ET4 is the edge thickness of the fourth lens E4, and ET5 is the edge thickness of the fifth lens E5.

[0112] DT11 / DT32 = 0.83, where DT11 is the effective radius of the object side surface S1 of the first lens E1, and DT32 is the effective radius of the image side surface S6 of the third lens E3.

[0113] DT11 / DT62 = 0.37, where DT11 is the effective radius of the object side surface S1 of the first lens E1, and DT62 is the effective radius of the image side surface S12 of the sixth lens E6.

[0114] SAG52 / CT5=-0.71, where SAG52 is the on-axis distance between the intersection of the image-side surface S10 of the fifth lens E5 and the optical axis and the vertex of the maximum effective radius of the image-side surface S10 of the fifth lens E5, and CT5 is the center thickness of the fifth lens E5 on the optical axis.

[0115] Figure 2A The on-axis chromatic aberration curve of the optical lens group of Embodiment 1 is shown, which represents the deviation of the focal point of light of different wavelengths after passing through the lens. Figure 2B The astigmatism curves of the optical lens group of Embodiment 1 are shown, which represent the meridional image plane curvature and the sagittal image plane curvature. Figure 2C The distortion curves of the optical lens group of Embodiment 1 are shown, which represent the distortion magnitude values ​​corresponding to different field of view angles. Figure 2D The magnification chromatic aberration curves of the optical lens group of Embodiment 1 are shown, representing the deviation of different image heights on the imaging plane after light passes through the lens. According to... Figures 2A to 2D It can be seen that the optical lens group given in Example 1 can achieve good imaging quality.

[0116] Example 2

[0117] The following is for reference Figures 3 to 4D The optical lens assembly according to Embodiment 2 of this application is described. In this embodiment and the following embodiments, for the sake of brevity, some descriptions similar to those in Embodiment 1 will be omitted. Figure 3 A schematic diagram of the structure of an optical lens group according to Embodiment 2 of this application is shown.

[0118] like Figure 3 As shown, the optical lens group according to an exemplary embodiment of this application includes, in sequence along the optical axis from the object side to the image side: a first lens E1, an aperture stop STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7, and an imaging surface S15.

[0119] The first lens E1 has negative optical power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative optical power, with its object-side surface S3 being concave and its image-side surface S4 being convex. 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 S9 being concave and its image-side surface S10 being convex. The sixth lens E6 has negative optical power, with its object-side surface S11 being convex and its image-side surface S12 being concave. The filter E7 has an object-side surface S13 and an image-side surface S14. Light from the object passes sequentially through surfaces S1 to S14 and is finally imaged onto the imaging surface S15.

[0120] Table 4 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens in the optical lens group of Example 2, wherein the units for radius of curvature and thickness are millimeters (mm).

[0121]

[0122]

[0123] Table 4

[0124] As shown in Table 4, in Example 2, the object-side surface and image-side surface of any one of the lenses, from the first lens E1 to the sixth lens E6, are aspherical. Table 5 shows the higher-order coefficients that can be used for each aspherical mirror in Example 2, wherein each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0125] Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 5.4435E-01 -7.6902E-01 4.4887E+00 -2.3375E+01 8.5487E+01 -1.9711E+02 2.7343E+02 -2.0671E+02 6.4785E+01 S2 9.0867E-01 -3.1443E+00 4.5817E+01 -4.0839E+02 2.3283E+03 -8.1653E+03 1.6980E+04 -1.8837E+04 8.3864E+03 S3 -1.1352E-02 -8.4646E-01 2.6268E+00 -4.7747E+01 5.7529E+02 -3.5383E+03 1.1442E+04 -1.8250E+04 1.1301E+04 S4 2.0082E-01 -6.4434E+00 3.5422E+01 -1.6339E+02 6.2954E+02 -1.4978E+03 1.4806E+03 6.9119E+02 -1.7659E+03 S5 4.1001E-01 -5.9762E+00 3.1068E+01 -1.3937E+02 5.4351E+02 -1.4321E+03 2.2607E+03 -1.9341E+03 6.9136E+02 S6 2.4015E-01 -7.6926E-01 -6.5678E+00 4.6908E+01 -1.4427E+02 2.6767E+02 -3.0617E+02 1.9535E+02 -5.2494E+01 S7 3.6458E-02 -5.2828E-01 -3.7058E+00 2.0771E+01 -3.8891E+01 3.0573E+01 -3.0739E+00 -9.1068E+00 3.7496E+00 S8 -1.2516E-01 8.3790E-01 -5.2405E+00 1.6313E+01 -2.7884E+01 2.8407E+01 -1.7457E+01 6.0445E+00 -9.1860E-01 S9 4.1197E-02 -1.2020E-01 -1.2263E-01 1.8495E+00 -6.2113E+00 1.0459E+01 -9.3324E+00 4.2328E+00 -7.7343E-01 S10 -2.4302E-01 3.9499E-01 -1.1703E+00 2.8122E+00 -4.4827E+00 4.5693E+00 -2.8781E+00 1.0226E+00 -1.5541E-01 S11 -1.3085E-01 -1.0954E-01 5.5772E-02 2.4917E-01 -5.0760E-01 4.4187E-01 -2.0721E-01 5.1402E-02 -5.2889E-03 S12 -1.6712E-01 4.0358E-02 5.8398E-02 -8.6606E-02 5.6456E-02 -2.1456E-02 4.8842E-03 -6.2008E-04 3.3923E-05

[0126] Table 5

[0127] Table 6 gives the total optical length TTL of the optical lens group in Example 2, half the diagonal length of the effective pixel area on the imaging surface S15 of the optical lens group ImgH, the maximum semi-FOV, the total effective focal length f of the optical lens group, and the effective focal lengths f1 to f6 of each lens.

[0128] TTL(mm) 4.50 f2 (mm) -588.18 ImgH(mm) 2.41 f3 (mm) 1.99 Semi-FOV (°) 52.3 f4 (mm) -4.83 f(mm) 1.99 f5 (mm) 1.34 f1(mm) -7.79 f6 (mm) -1.60

[0129] Table 6

[0130] Figure 4A The on-axis chromatic aberration curve of the optical lens group of Embodiment 2 is shown, which indicates the deviation of the focal point of light of different wavelengths after passing through the lens. Figure 4B The astigmatism curves of the optical lens group of Embodiment 2 are shown, which represent the meridional image plane curvature and the sagittal image plane curvature. Figure 4CThe distortion curves of the optical lens group of Embodiment 2 are shown, which represent the distortion magnitude values ​​corresponding to different field of view angles. Figure 4D The magnification chromatic aberration curves of the optical lens group of Embodiment 2 are shown, representing the deviation of different image heights on the imaging plane after light passes through the lens. According to... Figures 4A to 4D It can be seen that the optical lens group given in Example 2 can achieve good imaging quality.

[0131] Example 3

[0132] The following is for reference Figures 5 to 6D An optical lens assembly according to Embodiment 3 of this application is described. Figure 5 A schematic diagram of the structure of the optical lens group according to Embodiment 3 of this application is shown.

[0133] like Figure 5 As shown, the optical lens group according to an exemplary embodiment of this application includes, in sequence along the optical axis from the object side to the image side: a first lens E1, an aperture stop STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7, and an imaging surface S15.

[0134] 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 positive optical power, with its object-side surface S3 being convex and its image-side surface S4 being convex. The third lens E3 has negative optical power, with its object-side surface S5 being concave 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 S9 being concave and its image-side surface S10 being convex. The sixth lens E6 has negative optical power, with its object-side surface S11 being convex and its image-side surface S12 being concave. The filter E7 has an object-side surface S13 and an image-side surface S14. Light from the object passes sequentially through surfaces S1 to S14 and is finally imaged onto the imaging surface S15.

[0135] Table 7 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens in the optical lens group of Example 3, wherein the units for radius of curvature and thickness are millimeters (mm).

[0136]

[0137]

[0138] Table 7

[0139] As shown in Table 7, in Embodiment 3, the object-side surface and image-side surface of any one of the lenses from the first lens E1 to the sixth lens E6 are aspherical. Table 8 shows the higher-order coefficients that can be used for each aspherical mirror in Embodiment 3, wherein each aspherical surface shape can be defined by formula (1) given in Embodiment 1 above.

[0140] Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 4.5692E-01 -2.2390E-01 -3.3064E-01 6.4406E+00 -3.0008E+01 7.8737E+01 -1.2130E+02 1.0389E+02 -3.9358E+01 S2 8.1730E-01 -2.4023E+00 4.9767E+01 -5.6709E+02 4.1736E+03 -1.8946E+04 5.1758E+04 -7.7072E+04 4.8064E+04 S3 -2.0830E-02 -1.1740E+00 2.3890E+01 -3.4175E+02 2.9962E+03 -1.6516E+04 5.5220E+04 -1.0205E+05 8.0309E+04 S4 9.6683E-02 -1.0748E+00 1.4183E+00 -2.8737E+01 3.1653E+02 -1.5396E+03 3.8832E+03 -5.0602E+03 2.7463E+03 S5 2.6893E-01 -1.0409E+00 -7.6131E+00 5.3704E+01 -1.1480E+02 -3.7305E+01 5.3751E+02 -7.8690E+02 3.6777E+02 S6 -9.5685E-02 2.7388E+00 -2.3848E+01 1.0199E+02 -2.4975E+02 3.6044E+02 -2.9824E+02 1.2674E+02 -1.9850E+01 S7 -1.0405E-01 -2.4986E-02 -3.8517E+00 2.2389E+01 -5.7310E+01 8.1943E+01 -6.8770E+01 3.2326E+01 -6.8616E+00 S8 -1.2869E-01 4.2753E-01 -2.1849E+00 7.5182E+00 -1.4812E+01 1.7539E+01 -1.2421E+01 4.8513E+00 -8.0562E-01 S9 5.0143E-02 -2.3685E-01 8.9591E-01 -2.5538E+00 5.0760E+00 -6.6336E+00 5.4303E+00 -2.4769E+00 4.7351E-01 S10 -2.5933E-01 2.6130E-01 -2.7831E-01 2.4627E-01 -1.9167E-01 1.3230E-01 -5.8436E-02 6.5903E-03 3.5647E-03 S11 -1.8737E-01 1.1285E-01 -2.5708E-01 4.6634E-01 -5.4579E-01 3.9930E-01 -1.7738E-01 4.3594E-02 -4.5007E-03 S12 -1.4827E-01 6.6642E-02 -1.0587E-02 -1.6257E-02 1.5505E-02 -6.8324E-03 1.6938E-03 -2.2751E-04 1.2964E-05

[0141] Table 8

[0142] Table 9 gives the total optical length TTL of the optical lens group in Example 3, half the diagonal length of the effective pixel area on the imaging surface S15 of the optical lens group ImgH, the maximum semi-FOV, the total effective focal length f of the optical lens group, and the effective focal lengths f1 to f6 of each lens.

[0143]

[0144]

[0145] Table 9

[0146] Figure 6A The on-axis chromatic aberration curve of the optical lens group of Embodiment 3 is shown, which indicates the deviation of the focal point of light of different wavelengths after passing through the lens. Figure 6B The astigmatism curves of the optical lens group of Embodiment 3 are shown, which represent the meridional image plane curvature and the sagittal image plane curvature. Figure 6C The distortion curves of the optical lens group of Embodiment 3 are shown, which represent the distortion values ​​corresponding to different field of view angles. Figure 6D The magnification chromatic aberration curves of the optical lens group of Embodiment 3 are shown, representing the deviation of different image heights on the imaging plane after light passes through the lens. According to... Figures 6A to 6D It can be seen that the optical lens group given in Example 3 can achieve good imaging quality.

[0147] Example 4

[0148] The following is for reference Figures 7 to 8D An optical lens assembly according to Embodiment 4 of this application is described. Figure 7 A schematic diagram of the structure of the optical lens group according to Embodiment 4 of this application is shown.

[0149] like Figure 7 As shown, the optical lens group according to an exemplary embodiment of this application includes, in sequence along the optical axis from the object side to the image side: a first lens E1, an aperture stop STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7, and an imaging surface S15.

[0150] 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 positive optical power, with its object-side surface S3 being convex and its image-side surface S4 being convex. The third lens E3 has positive optical power, with its object-side surface S5 being concave and its image-side surface S6 being convex. The fourth lens E4 has positive 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 S9 being concave and its image-side surface S10 being convex. The sixth lens E6 has negative optical power, with its object-side surface S11 being convex and its image-side surface S12 being concave. The filter E7 has an object-side surface S13 and an image-side surface S14. Light from the object passes sequentially through surfaces S1 to S14 and is finally imaged onto the imaging surface S15.

[0151] Table 10 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens in the optical lens group of Example 4, wherein the units for radius of curvature and thickness are millimeters (mm).

[0152]

[0153] Table 10

[0154] As shown in Table 10, in Example 4, the object-side surface and image-side surface of any one of the lenses from the first lens E1 to the sixth lens E6 are aspherical. Table 11 shows the higher-order coefficients that can be used for each aspherical mirror in Example 4, wherein each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0155] Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 3.9316E-01 -1.6422E-01 -4.0117E-01 4.6728E+00 -1.9018E+01 4.5626E+01 -6.5058E+01 5.1291E+01 -1.7305E+01 S2 7.5331E-01 -9.7313E-01 1.9083E+01 -1.3345E+02 2.8826E+02 2.7927E+03 -2.1522E+04 5.8897E+04 -5.8569E+04 S3 4.4726E-02 -2.4021E+00 5.3078E+01 -7.3798E+02 6.3042E+03 -3.3782E+04 1.0998E+05 -1.9792E+05 1.5080E+05 S4 -1.3088E-01 8.2034E-01 -7.7285E+00 1.3778E+01 4.8195E+00 -3.0387E+00 -1.5915E+02 3.4196E+02 -1.8455E+02 S5 2.4381E-02 1.8509E+00 -1.4386E+01 4.9013E+01 -1.5844E+02 4.7065E+02 -8.9711E+02 9.1044E+02 -3.7525E+02 S6 -1.2611E+00 1.0771E+01 -5.5623E+01 2.0727E+02 -5.7368E+02 1.1118E+03 -1.3755E+03 9.5414E+02 -2.7935E+02 S7 -4.1333E-02 -2.3427E+00 1.1972E+01 -3.4424E+01 5.9614E+01 -5.4628E+01 1.3403E+01 1.5443E+01 -9.6092E+00 S8 3.2079E-01 -3.2708E+00 1.2669E+01 -2.9817E+01 4.6455E+01 -4.7598E+01 3.0692E+01 -1.1286E+01 1.8039E+00 S9 -7.4686E-02 9.7234E-01 -4.5594E+00 1.1238E+01 -1.6044E+01 1.3717E+01 -6.6800E+00 1.5736E+00 -1.0405E-01 S10 -3.4933E-01 6.8566E-01 -1.6470E+00 3.0550E+00 -4.0165E+00 3.5008E+00 -1.8439E+00 5.1081E-01 -5.1912E-02 S11 -1.6067E-01 5.5390E-02 -3.9379E-01 9.4453E-01 -1.2447E+00 1.0036E+00 -4.8874E-01 1.3080E-01 -1.4628E-02 S12 -5.4392E-02 -1.1681E-01 1.9594E-01 -1.7160E-01 9.5232E-02 -3.4078E-02 7.5816E-03 -9.5307E-04 5.1774E-05

[0156] Table 11

[0157] Table 12 gives the total optical length TTL of the optical lens group in Example 4, half the diagonal length of the effective pixel area on the imaging surface S15 of the optical lens group ImgH, the maximum semi-FOV, the total effective focal length f of the optical lens group, and the effective focal lengths f1 to f6 of each lens.

[0158] TTL(mm) 4.50 f2 (mm) 2.27 ImgH(mm) 2.41 f3 (mm) 1841.82 Semi-FOV (°) 52.0 f4 (mm) 500.01 f(mm) 1.95 f5 (mm) 1.09 f1(mm) -5.45 f6 (mm) -1.17

[0159] Table 12

[0160] Figure 8A The on-axis chromatic aberration curve of the optical lens group of Embodiment 4 is shown, which indicates the deviation of the focal point of light of different wavelengths after passing through the lens. Figure 8B The astigmatism curves of the optical lens group of Embodiment 4 are shown, which represent the meridional image plane curvature and the sagittal image plane curvature. Figure 8C The distortion curves of the optical lens group in Example 4 are shown, representing the distortion magnitude values ​​corresponding to different field of view angles. Figure 8DThe magnification chromatic aberration curves of the optical lens group in Example 4 are shown, representing the deviation of different image heights on the imaging plane after light passes through the lens. According to... Figures 8A to 8D It can be seen that the optical lens group given in Example 4 can achieve good imaging quality.

[0161] Example 5

[0162] The following is for reference Figures 9 to 10D An optical lens assembly according to Embodiment 5 of this application is described. Figure 9 A schematic diagram of the structure of an optical lens assembly according to Embodiment 5 of this application is shown.

[0163] like Figure 9 As shown, the optical lens group according to an exemplary embodiment of this application includes, in sequence along the optical axis from the object side to the image side: a first lens E1, an aperture stop STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7, and an imaging surface S15.

[0164] 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 positive optical power, with its object-side surface S3 being convex and its image-side surface S4 being convex. The third lens E3 has positive optical power, with its object-side surface S5 being concave 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 S9 being concave and its image-side surface S10 being convex. The sixth lens E6 has positive optical power, with its object-side surface S11 being convex and its image-side surface S12 being concave. The filter E7 has an object-side surface S13 and an image-side surface S14. Light from the object passes sequentially through surfaces S1 to S14 and is finally imaged onto the imaging surface S15.

[0165] Table 13 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens in the optical lens group of Example 5, wherein the units for radius of curvature and thickness are millimeters (mm).

[0166]

[0167] Table 13

[0168] As shown in Table 13, in Embodiment 5, the object-side surface and image-side surface of any one of the lenses from the first lens E1 to the sixth lens E6 are aspherical. Table 14 shows the higher-order coefficients that can be used for each aspherical mirror surface in Embodiment 5, wherein each aspherical surface shape can be defined by formula (1) given in Embodiment 1 above.

[0169]

[0170]

[0171] Table 14

[0172] Table 15 gives the total optical length TTL of the optical lens group in Example 5, half the diagonal length of the effective pixel area on the imaging surface S15 of the optical lens group ImgH, the maximum semi-FOV, the total effective focal length f of the optical lens group, and the effective focal lengths f1 to f6 of each lens.

[0173] TTL(mm) 4.53 f2 (mm) 2.37 ImgH(mm) 2.41 f3 (mm) 5.84 Semi-FOV (°) 52.0 f4 (mm) -4.52 f(mm) 1.98 f5 (mm) 5.00 f1(mm) -6.65 f6 (mm) 31.63

[0174] Table 15

[0175] Figure 10A The on-axis chromatic aberration curve of the optical lens group of Embodiment 5 is shown, which represents the deviation of the focal point of light of different wavelengths after passing through the lens. Figure 10B The astigmatism curves of the optical lens group of Embodiment 5 are shown, which represent the meridional image plane curvature and the sagittal image plane curvature. Figure 10C The distortion curves of the optical lens group of Example 5 are shown, which represent the distortion magnitude values ​​corresponding to different field of view angles. Figure 10D The magnification chromatic aberration curves of the optical lens group of Embodiment 5 are shown, representing the deviation of different image heights on the imaging plane after light passes through the lens. According to... Figures 10A to 10D It can be seen that the optical lens group given in Example 5 can achieve good imaging quality.

[0176] Example 6

[0177] The following is for reference Figures 11 to 12D An optical lens assembly according to Embodiment 6 of this application is described. Figure 11 A schematic diagram of the structure of an optical lens assembly according to Embodiment 6 of this application is shown.

[0178] like Figure 11 As shown, the optical lens group according to an exemplary embodiment of this application includes, in sequence along the optical axis from the object side to the image side: a first lens E1, an aperture stop STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7, and an imaging surface S15.

[0179] The first lens E1 has negative optical power, with its object-side surface S1 being concave and its image-side surface S2 being concave. The second lens E2 has positive optical power, with its object-side surface S3 being convex and its image-side surface S4 being convex. The third lens E3 has positive optical power, with its object-side surface S5 being concave 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 S9 being concave and its image-side surface S10 being convex. The sixth lens E6 has negative optical power, with its object-side surface S11 being convex and its image-side surface S12 being concave. The filter E7 has an object-side surface S13 and an image-side surface S14. Light from the object passes sequentially through surfaces S1 to S14 and is finally imaged onto the imaging surface S15.

[0180] Table 16 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens in the optical lens group of Example 6, wherein the units for radius of curvature and thickness are millimeters (mm).

[0181]

[0182] Table 16

[0183] As shown in Table 16, in Example 6, the object-side surface and image-side surface of any one of the lenses from the first lens E1 to the sixth lens E6 are aspherical. Table 17 shows the higher-order coefficients that can be used for each aspherical mirror in Example 6, wherein each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0184]

[0185]

[0186] Table 17

[0187] Table 18 gives the total optical length TTL of the optical lens group in Example 6, half the diagonal length of the effective pixel area on the imaging surface S15 of the optical lens group ImgH, the maximum semi-FOV, the total effective focal length f of the optical lens group, and the effective focal lengths f1 to f6 of each lens.

[0188] TTL(mm) 4.49 f2 (mm) 2.42 ImgH(mm) 2.41 f3 (mm) 5.37 Semi-FOV (°) 52.1 f4 (mm) -5.31 f(mm) 1.98 f5 (mm) 1.32 f1(mm) -5.01 f6 (mm) -1.58

[0189] Table 18

[0190] Figure 12A The on-axis chromatic aberration curve of the optical lens group of Embodiment 6 is shown, which indicates the deviation of the focal point of light of different wavelengths after passing through the lens. Figure 12B The astigmatism curves of the optical lens group of Embodiment 6 are shown, which represent the meridional image plane curvature and the sagittal image plane curvature. Figure 12CThe distortion curves of the optical lens group of Embodiment 6 are shown, which represent the distortion magnitude values ​​corresponding to different field of view angles. Figure 12D The magnification chromatic aberration curves of the optical lens group of Embodiment 6 are shown, representing the deviation of different image heights on the imaging plane after light passes through the lens. According to... Figures 12A to 12D It can be seen that the optical lens group given in Example 6 can achieve good imaging quality.

[0191] Example 7

[0192] The following is for reference Figures 13 to 14D An optical lens assembly according to Embodiment 7 of this application is described. Figure 13 A schematic diagram of the structure of the optical lens group according to Embodiment 7 of this application is shown.

[0193] like Figure 13 As shown, the optical lens group according to an exemplary embodiment of this application includes, in sequence along the optical axis from the object side to the image side: a first lens E1, an aperture stop STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7, and an imaging surface S15.

[0194] The first lens E1 has negative optical power, with its object-side surface S1 being concave and its image-side surface S2 being convex. The second lens E2 has positive optical power, with its object-side surface S3 being convex and its image-side surface S4 being convex. The third lens E3 has positive optical power, with its object-side surface S5 being concave 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 S9 being concave and its image-side surface S10 being convex. The sixth lens E6 has negative optical power, with its object-side surface S11 being convex and its image-side surface S12 being concave. The filter E7 has an object-side surface S13 and an image-side surface S14. Light from the object passes sequentially through surfaces S1 to S14 and is finally imaged onto the imaging surface S15.

[0195] Table 19 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens in the optical lens group of Example 7, wherein the units for radius of curvature and thickness are millimeters (mm).

[0196]

[0197] Table 19

[0198] As shown in Table 19, in Embodiment 7, the object-side surface and image-side surface of any one of the lenses from the first lens E1 to the sixth lens E6 are aspherical. Table 20 shows the higher-order coefficients that can be used for each aspherical mirror surface in Embodiment 7, wherein each aspherical surface shape can be defined by formula (1) given in Embodiment 1 above.

[0199] Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 5.3048E-01 -7.1472E-01 2.2485E+00 -8.5448E+00 2.4285E+01 -4.5497E+01 5.3180E+01 -3.4977E+01 9.7801E+00 S2 1.0891E+00 -2.3090E+00 2.5243E+01 -2.5950E+02 1.8584E+03 -8.3811E+03 2.2954E+04 -3.4838E+04 2.2626E+04 S3 1.1699E-01 -1.3202E+00 1.4846E+01 -1.5564E+02 1.0679E+03 -4.5308E+03 1.1443E+04 -1.5416E+04 8.3652E+03 S4 2.1241E-01 -4.2898E+00 2.5844E+01 -1.4913E+02 7.0278E+02 -2.0397E+03 3.0393E+03 -1.6632E+03 -1.7074E+02 S5 3.9190E-01 -4.2337E+00 1.9353E+01 -7.4139E+01 3.0423E+02 -9.3059E+02 1.6120E+03 -1.3838E+03 4.5238E+02 S6 3.3878E-02 -8.0039E-01 8.2329E+00 -4.7142E+01 1.7432E+02 -3.9312E+02 5.1244E+02 -3.5795E+02 1.0469E+02 S7 -5.3530E-02 -1.3531E+00 7.4530E+00 -2.4403E+01 5.5956E+01 -8.6606E+01 8.2250E+01 -4.2326E+01 8.9778E+00 S8 -4.2073E-02 -3.8335E-01 2.1469E+00 -6.5560E+00 1.3445E+01 -1.8258E+01 1.5482E+01 -7.3124E+00 1.4552E+00 S9 -4.5727E-03 6.2959E-02 -5.1118E-01 2.2841E+00 -5.0686E+00 6.1544E+00 -4.0651E+00 1.3570E+00 -1.7693E-01 S10 -2.3659E-01 1.4054E-01 1.4196E-01 -7.6271E-01 1.3860E+00 -1.3684E+00 7.6401E-01 -2.2485E-01 2.8353E-02 S11 -2.6522E-01 4.2771E-01 -1.0781E+00 1.8015E+00 -1.9163E+00 1.2883E+00 -5.3168E-01 1.2276E-01 -1.2077E-02 S12 -1.2381E-01 9.5903E-03 5.6139E-02 -5.9324E-02 3.1204E-02 -9.6597E-03 1.7608E-03 -1.7333E-04 7.0524E-06

[0200] Table 20

[0201] Table 21 gives the total optical length TTL of the optical lens group in Example 7, half the diagonal length of the effective pixel area on the imaging surface S15 of the optical lens group ImgH, the maximum semi-FOV, the total effective focal length f of the optical lens group, and the effective focal lengths f1 to f6 of each lens.

[0202] TTL(mm) 4.50 f2 (mm) 3.57 ImgH(mm) 2.41 f3 (mm) 3.71 Semi-FOV (°) 52.0 f4 (mm) -5.84 f(mm) 2.00 f5 (mm) 1.35 f1(mm) -6.43 f6 (mm) -1.63

[0203] Table 21

[0204] Figure 14A The on-axis chromatic aberration curve of the optical lens group of Embodiment 7 is shown, which represents the deviation of the focal point of light of different wavelengths after passing through the lens. Figure 14B The astigmatism curves of the optical lens group of Embodiment 7 are shown, which represent the meridional image plane curvature and the sagittal image plane curvature. Figure 14C The distortion curves of the optical lens group of Embodiment 7 are shown, which represent the distortion magnitude values ​​corresponding to different field of view angles. Figure 14D The magnification chromatic aberration curves of the optical lens group of Embodiment 7 are shown, representing the deviation of different image heights on the imaging plane after light passes through the lens. According to... Figures 14A to 14D It can be seen that the optical lens group given in Example 7 can achieve good imaging quality.

[0205] Example 8

[0206] The following is for reference Figures 15 to 16D An optical lens group according to Embodiment 8 of this application is described. Figure 15 A schematic diagram of the structure of an optical lens group according to Embodiment 8 of this application is shown.

[0207] like Figure 15 As shown, the optical lens group according to an exemplary embodiment of this application includes, in sequence along the optical axis from the object side to the image side: a first lens E1, an aperture stop STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7, and an imaging surface S15.

[0208] 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 positive optical power, with its object-side surface S3 being concave and its image-side surface S4 being convex. The third lens E3 has positive optical power, with its object-side surface S5 being concave 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 S9 being concave and its image-side surface S10 being convex. The sixth lens E6 has negative optical power, with its object-side surface S11 being convex and its image-side surface S12 being concave. The filter E7 has an object-side surface S13 and an image-side surface S14. Light from the object passes sequentially through surfaces S1 to S14 and is finally imaged onto the imaging surface S15.

[0209] Table 22 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens in the optical lens group of Example 8, wherein the units for radius of curvature and thickness are millimeters (mm).

[0210]

[0211]

[0212] Table 22

[0213] As shown in Table 22, in Embodiment 8, the object-side surface and image-side surface of any one of the lenses, from the first lens E1 to the sixth lens E6, are aspherical. Table 23 shows the higher-order coefficients that can be used for each aspherical mirror surface in Embodiment 8, wherein each aspherical surface shape can be defined by formula (1) given in Embodiment 1 above.

[0214] Table 23

[0215] Table 24 gives the total optical length TTL of the optical lens group in Example 8, half the diagonal length of the effective pixel area on the imaging surface S15 of the optical lens group ImgH, the maximum semi-FOV, the total effective focal length f of the optical lens group, and the effective focal lengths f1 to f6 of each lens.

[0216]

[0217]

[0218] Table 24

[0219] Figure 16A The on-axis chromatic aberration curve of the optical lens group of Embodiment 8 is shown, which represents the deviation of the focal point of light of different wavelengths after passing through the lens. Figure 16B The astigmatism curves of the optical lens group of Embodiment 8 are shown, which represent the meridional image plane curvature and the sagittal image plane curvature. Figure 16C The distortion curves of the optical lens group of Example 8 are shown, which represent the distortion magnitude values ​​corresponding to different field of view angles. Figure 16D The magnification chromatic aberration curves of the optical lens group of Embodiment 8 are shown, representing the deviation of different image heights on the imaging plane after light passes through the lens. According to... Figures 16A to 16D It can be seen that the optical lens group given in Example 8 can achieve good imaging quality.

[0220] Example 9

[0221] The following is for reference Figures 17 to 18D An optical lens assembly according to Embodiment 9 of this application is described. Figure 17 A schematic diagram of the structure of an optical lens assembly according to Embodiment 9 of this application is shown.

[0222] like Figure 17 As shown, the optical lens group according to an exemplary embodiment of this application includes, in sequence along the optical axis from the object side to the image side: a first lens E1, an aperture stop STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7, and an imaging surface S15.

[0223] 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 positive 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 S9 being concave and its image-side surface S10 being convex. The sixth lens E6 has negative optical power, with its object-side surface S11 being convex and its image-side surface S12 being concave. The filter E7 has an object-side surface S13 and an image-side surface S14. Light from the object passes sequentially through surfaces S1 to S14 and is finally imaged onto the imaging surface S15.

[0224] Table 25 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens in the optical lens group of Example 9, wherein the units for radius of curvature and thickness are millimeters (mm).

[0225]

[0226] Table 25

[0227] As shown in Table 25, in Example 9, the object-side surface and image-side surface of any one of the lenses from the first lens E1 to the sixth lens E6 are aspherical. Table 26 shows the higher-order coefficients that can be used for each aspherical mirror in Example 9, wherein each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0228] Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 5.4092E-01 -7.6735E-01 3.5457E+00 -1.6312E+01 5.7838E+01 -1.3754E+02 2.0380E+02 -1.6819E+02 5.8518E+01 S2 9.1047E-01 -2.6208E+00 4.2354E+01 -4.5937E+02 3.3963E+03 -1.6098E+04 4.6982E+04 -7.6608E+04 5.3694E+04 S3 -1.0860E-01 4.5551E+00 -1.3652E+02 2.0929E+03 -1.9655E+04 1.1575E+05 -4.1601E+05 8.3364E+05 -7.1322E+05 S4 4.0279E-02 -3.6035E+00 9.1187E+00 2.4481E+01 -3.9153E+02 2.3398E+03 -7.5038E+03 1.2393E+04 -8.2903E+03 S5 3.1061E-01 -4.5479E+00 2.5724E+01 -1.4304E+02 6.2461E+02 -1.6629E+03 2.5363E+03 -2.0535E+03 6.8491E+02 S6 5.2455E-02 9.1412E-02 -7.8620E+00 4.9737E+01 -1.6698E+02 3.4480E+02 -4.2628E+02 2.8450E+02 -7.8174E+01 S7 1.1109E-01 -1.4733E+00 2.1835E+00 1.4691E+00 -4.7399E+00 -8.1494E-01 8.0064E+00 -6.5237E+00 1.5943E+00 S8 -4.0239E-02 2.0675E-01 -3.0119E+00 1.1967E+01 -2.3956E+01 2.8979E+01 -2.1833E+01 9.4807E+00 -1.8120E+00 S9 -8.9510E-02 9.8217E-01 -4.7690E+00 1.4035E+01 -2.7336E+01 3.4610E+01 -2.6635E+01 1.1204E+01 -1.9725E+00 S10 -2.9264E-01 8.6216E-01 -2.9832E+00 6.9790E+00 -1.0702E+01 1.0594E+01 -6.5154E+00 2.2627E+00 -3.3696E-01 S11 2.0503E-01 -9.0081E-01 1.3357E+00 -1.3622E+00 9.2739E-01 -3.9678E-01 9.3097E-02 -7.2579E-03 -5.9924E-04 S12 6.2277E-02 -2.9122E-01 3.4287E-01 -2.4482E-01 1.1440E-01 -3.5104E-02 6.8176E-03 -7.6120E-04 3.7334E-05

[0229] Table 26

[0230] Table 27 gives the total optical length TTL of the optical lens group in Example 9, half the diagonal length of the effective pixel area on the imaging surface S15 of the optical lens group ImgH, the maximum semi-FOV, the total effective focal length f of the optical lens group, and the effective focal lengths f1 to f6 of each lens.

[0231] TTL(mm) 4.49 f2 (mm) 56.18 ImgH(mm) 2.41 f3 (mm) 2.04 Semi-FOV (°) 52.4 f4 (mm) -6.19 f(mm) 2.00 f5 (mm) 0.97 f1(mm) -6.64 f6 (mm) -1.01

[0232] Table 27

[0233] Figure 18A The on-axis chromatic aberration curve of the optical lens group of Embodiment 9 is shown, which represents the deviation of the focal point of light of different wavelengths after passing through the lens. Figure 18B The astigmatism curves of the optical lens group of Embodiment 9 are shown, which represent the meridional image plane curvature and the sagittal image plane curvature. Figure 18C The distortion curves of the optical lens group of Example 9 are shown, which represent the distortion magnitude values ​​corresponding to different field of view angles. Figure 18D The magnification chromatic aberration curves of the optical lens group of Embodiment 9 are shown, representing the deviation of different image heights on the imaging plane after light passes through the lens. According to... Figures 18A to 18D It can be seen that the optical lens group given in Example 9 can achieve good imaging quality.

[0234] Example 10

[0235] The following is for reference Figures 19 to 20D An optical lens assembly according to Embodiment 10 of this application is described. Figure 19 A schematic diagram of the structure of an optical lens group according to Embodiment 10 of this application is shown.

[0236] like Figure 19 As shown, the optical lens group according to an exemplary embodiment of this application includes, in sequence along the optical axis from the object side to the image side: a first lens E1, an aperture stop STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7, and an imaging surface S15.

[0237] 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 positive optical power, with its object-side surface S3 being convex and its image-side surface S4 being convex. The third lens E3 has positive optical power, with its object-side surface S5 being concave and its image-side surface S6 being convex. The fourth lens E4 has negative optical power, with its object-side surface S7 being concave and its image-side surface S8 being concave. The fifth lens E5 has positive optical power, with its object-side surface S9 being concave and its image-side surface S10 being convex. The sixth lens E6 has negative optical power, with its object-side surface S11 being convex and its image-side surface S12 being concave. The filter E7 has an object-side surface S13 and an image-side surface S14. Light from the object passes sequentially through surfaces S1 to S14 and is finally imaged onto the imaging surface S15.

[0238] Table 28 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens in the optical lens group of Example 10, wherein the units for radius of curvature and thickness are millimeters (mm).

[0239]

[0240] Table 28

[0241] As shown in Table 28, in Example 10, the object-side surface and image-side surface of any one of the lenses, from the first lens E1 to the sixth lens E6, are aspherical. Table 29 shows the higher-order coefficients that can be used for each aspherical mirror in Example 10, wherein each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0242]

[0243]

[0244] Table 29

[0245] Table 30 gives the total optical length TTL of the optical lens group in Example 10, half the diagonal length of the effective pixel area on the imaging surface S15 of the optical lens group ImgH, the maximum semi-FOV, the total effective focal length f of the optical lens group, and the effective focal lengths f1 to f6 of each lens.

[0246] TTL(mm) 4.49 f2 (mm) 2.16 ImgH(mm) 2.41 f3 (mm) 8.26 Semi-FOV (°) 52.2 f4 (mm) -4.01 f(mm) 1.97 f5 (mm) 1.31 f1(mm) -6.21 f6 (mm) -1.65

[0247] Table 30

[0248] Figure 20A The on-axis chromatic aberration curve of the optical lens group of Embodiment 10 is shown, which represents the deviation of the focal point of light of different wavelengths after passing through the lens. Figure 20B The astigmatism curves of the optical lens group of Embodiment 10 are shown, which represent the meridional image plane curvature and the sagittal image plane curvature. Figure 20CThe distortion curves of the optical lens group of Embodiment 10 are shown, which represent the distortion magnitude values ​​corresponding to different field of view angles. Figure 20D The magnification chromatic aberration curves of the optical lens group of Embodiment 10 are shown, representing the deviation of different image heights on the imaging plane after light passes through the lens. According to... Figures 20A to 20D It can be seen that the optical lens group given in Example 10 can achieve good imaging quality.

[0249] Example 11

[0250] The following is for reference Figures 21 to 22D An optical lens assembly according to Embodiment 11 of this application is described. Figure 21 A schematic diagram of the structure of an optical lens group according to Embodiment 11 of this application is shown.

[0251] like Figure 21 As shown, the optical lens group according to an exemplary embodiment of this application includes, in sequence along the optical axis from the object side to the image side: a first lens E1, an aperture stop STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7, and an imaging surface S15.

[0252] 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 positive optical power, with its object-side surface S3 being convex and its image-side surface S4 being convex. The third lens E3 has positive optical power, with its object-side surface S5 being concave 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 S9 being convex and its image-side surface S10 being convex. The sixth lens E6 has negative optical power, with its object-side surface S11 being convex and its image-side surface S12 being concave. The filter E7 has an object-side surface S13 and an image-side surface S14. Light from the object passes sequentially through surfaces S1 to S14 and is finally imaged onto the imaging surface S15.

[0253] Table 31 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens in the optical lens group of Example 11, wherein the units for radius of curvature and thickness are millimeters (mm).

[0254]

[0255] Table 31

[0256] As shown in Table 31, in Example 11, the object-side surface and image-side surface of any one of the lenses from the first lens E1 to the sixth lens E6 are aspherical. Table 32 shows the higher-order coefficients that can be used for each aspherical mirror in Example 11, wherein each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0257] Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 4.7699E-01 -2.8968E-01 2.1283E-01 3.9947E+00 -2.2606E+01 6.6854E+01 -1.1493E+02 1.1063E+02 -4.7355E+01 S2 8.0823E-01 -2.1694E+00 3.7499E+01 -3.4840E+02 2.0170E+03 -6.5698E+03 1.0323E+04 -2.0283E+03 -9.4736E+03 S3 -6.9256E-02 -1.4000E+00 3.4329E+01 -5.8480E+02 5.9242E+03 -3.7106E+04 1.3963E+05 -2.8986E+05 2.5542E+05 S4 6.0315E-02 -2.3979E+00 2.0019E+01 -1.7528E+02 1.0874E+03 -4.2732E+03 9.9727E+03 -1.2677E+04 6.8005E+03 S5 3.3151E-01 -2.7611E+00 8.7580E+00 -2.9975E+01 1.5567E+02 -6.0050E+02 1.2249E+03 -1.1843E+03 4.2325E+02 S6 3.9931E-01 -2.2648E+00 3.8831E+00 -5.4934E+00 4.6363E+01 -1.8830E+02 3.3483E+02 -2.7905E+02 9.0197E+01 S7 -3.3913E-03 -9.2136E-01 1.0531E+00 1.9272E+00 1.5130E+00 -2.3921E+01 4.2886E+01 -3.0010E+01 7.0286E+00 S8 -2.1571E-01 1.1922E+00 -5.4226E+00 1.5910E+01 -2.8984E+01 3.3464E+01 -2.4139E+01 9.9998E+00 -1.8271E+00 S9 2.1005E-02 -1.6497E-01 6.0488E-01 -1.0981E+00 1.1983E+00 -7.8407E-01 3.0544E-01 -6.7557E-02 6.8308E-03 S10 -2.5115E-01 3.4672E-01 -6.7062E-01 1.2348E+00 -1.6732E+00 1.5529E+00 -9.1669E-01 3.0699E-01 -4.3645E-02 S11 -2.1510E-01 8.5096E-02 -1.7462E-01 3.8670E-01 -4.9890E-01 3.8000E-01 -1.7181E-01 4.2580E-02 -4.4142E-03 S12 -1.8388E-01 9.5633E-02 -2.0276E-02 -1.7706E-02 1.8435E-02 -8.1525E-03 1.9999E-03 -2.6464E-04 1.4811E-05

[0258] Table 32

[0259] Table 33 gives the total optical length TTL of the optical lens group in Example 11, half the diagonal length of the effective pixel area on the imaging surface S15 of the optical lens group ImgH, the maximum semi-FOV, the total effective focal length f of the optical lens group, and the effective focal lengths f1 to f6 of each lens.

[0260] TTL(mm) 4.50 f2 (mm) 2.23 ImgH(mm) 2.41 f3 (mm) 22.96 Semi-FOV (°) 52.0 f4 (mm) -4.78 f(mm) 1.96 f5 (mm) 1.25 f1(mm) -5.74 f6 (mm) -1.52

[0261] Table 33

[0262] Figure 22A The on-axis chromatic aberration curve of the optical lens group of Embodiment 11 is shown, which represents the deviation of the focal point of light of different wavelengths after passing through the lens. Figure 22B The astigmatism curves of the optical lens group of Embodiment 11 are shown, which represent the meridional image plane curvature and the sagittal image plane curvature. Figure 22C The distortion curves of the optical lens group of Embodiment 11 are shown, which represent the distortion magnitude values ​​corresponding to different field of view angles. Figure 22D The magnification chromatic aberration curves of the optical lens group of Embodiment 11 are shown, representing the deviation of different image heights on the imaging plane after light passes through the lens. According to... Figures 22A to 22D It can be seen that the optical lens group given in Example 11 can achieve good imaging quality.

[0263] In summary, Examples 1 to 11 satisfy the relationships shown in Table 34.

[0264]

[0265]

[0266] Table 34

[0267] This application also provides a camera device, whose electronic photosensitive element can be a photocoupled device (CCD) or a complementary metal oxide semiconductor device (CMOS). The camera device can be a standalone camera device such as a digital camera, or a camera module integrated into a mobile electronic device such as a mobile phone. The camera device is equipped with the optical lens group described above.

[0268] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. An optical lens group, comprising, in sequence along the optical axis from the object side to the image side: The first lens, the second lens, the third lens, the fourth lens, the fifth lens, and the sixth lens are characterized in that, The first lens has negative optical power; The second lens has optical power; The third lens has optical power and its image-side surface is convex. The fourth lens has optical power and its image-side surface is concave. The fifth lens has positive optical power and its image-side surface is convex. The sixth lens has optical power, and its object side is convex and its image side is concave. Both the fourth lens and the sixth lens have negative optical power, and at least one of the second lens and the third lens has positive optical power; or, both the second lens and the third lens have positive optical power, and at least one of the fourth lens and the sixth lens has negative optical power. The optical lens group contains six lenses with optical power; and The spacing T23 between the second lens and the third lens on the optical axis, the spacing T34 between the third lens and the fourth lens on the optical axis, and the spacing T45 between the fourth lens and the fifth lens on the optical axis satisfy 0.18≤(T23+T34) / T45<0.5; The effective focal length f1 of the first lens and the total effective focal length f of the optical lens group satisfy -4.24 ≤ f1 / f < -2.5; The effective radius DT11 of the object side of the first lens and the effective radius DT32 of the image side of the third lens satisfy 0.79≤DT11 / DT32<1.

2. The optical lens assembly according to claim 1, characterized in that, The half-length of the diagonal of the effective pixel area on the imaging surface of the optical lens group, ImgH, and the total effective focal length f of the optical lens group satisfy 1.20≤ImgH / f≤1.

24.

3. The optical lens assembly according to claim 2, characterized in that, The radius of curvature R12 of the image side of the sixth lens and the center thickness CT6 of the sixth lens on the optical axis satisfy 1.32≤R12 / CT6<1.

5.

4. The optical lens assembly according to claim 1, characterized in that, The effective radius DT11 of the object side of the first lens and the effective radius DT62 of the image side of the sixth lens satisfy 0.35≤DT11 / DT62≤0.

41.

5. The optical lens assembly according to claim 1, characterized in that, The axial distance SAG52 between the intersection of the image-side surface of the fifth lens and the optical axis and the vertex of the maximum effective radius of the image-side surface of the fifth lens, and the center thickness CT5 of the fifth lens on the optical axis, satisfy -0.8 < SAG52 / CT5 ≤ -0.

61.

6. The optical lens assembly according to any one of claims 1 to 5, characterized in that, The combined focal length f23 of the second lens and the third lens satisfies 0.91≤f23 / f≤1.21 with the total effective focal length f of the optical lens group.

7. The optical lens assembly according to any one of claims 1 to 5, characterized in that, The center thickness CT2 of the second lens on the optical axis and the center thickness CT5 of the fifth lens on the optical axis satisfy 0.20≤CT2 / CT5≤0.

52.

8. The optical lens assembly according to any one of claims 1 to 5, characterized in that, The effective radius DT11 of the object side of the first lens and the distance TTL between the object side of the first lens and the imaging surface of the optical lens group on the optical axis satisfy 0.1 < DT11 / TTL ≤ 0.

18.

9. The optical lens assembly according to any one of claims 1 to 5, characterized in that, The distance Tr3r8 between the object side of the second lens and the image side of the fourth lens on the optical axis and the distance Tr9r12 between the object side of the fifth lens and the image side of the sixth lens on the optical axis satisfy 0.58≤Tr3r8 / Tr9r12≤0.88.

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