Optical image capturing system

Abstract

The utility model discloses an optical imaging system, and the system comprises a lens group. The zoom lens sequentially comprises a first lens with negative focal power, a second lens with positive focal power, a third lens with positive focal power, a fourth lens with negative focal power, a fifth lens with focal power, a sixth lens with positive focal power and a seventh lens with positive focal power from an object side to an image side along an optical axis, the spacing element group comprises a fourth spacing element and a fifth spacing element; and a lens barrel for accommodating the lens group and the spacer element group, wherein the half Semi-FOV of the maximum field angle of the optical imaging system meets the following conditions: 59.6 degree lt; the Semi-FOV is less than or equal to 61.6 degrees; the inner diameter d0m of the image-side end surface of the lens barrel and the inner diameter d0s of the object-side end surface of the lens barrel meet the following condition: 4.1 < = d0m / d0s < = 6.2; the axial distance EP45 from the image side face of the fourth spacing element to the object side face of the fifth spacing element, the thickness CP5 of the fifth spacing element in the optical axis direction and the center thickness CT6 of the sixth lens on the optical axis meet the condition that (EP45 + CP5) / CT6 is larger than or equal to 1.1 and smaller than or equal to 1.62.

Description

Technical Field

[0001] This application relates to the field of optical elements, and more particularly, to an optical imaging system. Background Art

[0002] With the continuous progress of technology and the continuous update and iteration of mobile electronic devices, the optimization and upgrading of related industries have been promoted. The most representative is that the mobile phone industry has driven the continuous iteration and upgrading of optical imaging lenses. The continuous increase in the memory of mobile phones and people's extreme pursuit of photo-taking quality have prompted the requirements for photo-taking and photography capabilities such as high pixels, large image planes, high definition, and high image cleanliness (the fewer stray light ghosts and flares, the higher the image cleanliness) to become strong demands of end-user customers. However, the requirements for high pixels and large image planes have also led to an increasing number of lens elements in the lens, an increasing number of mechanisms and components for supporting and installing, and an increasing number of components that can generate stray light. For example, as the number of lens elements increases, the design difficulty of the lens assembly space increases. If the size design of the lens barrel is unreasonable, stray light is likely to be generated, which is contrary to the requirement of high image cleanliness.

[0003] Therefore, how to reasonably set the relevant parameters of the lens, spacer element, and lens barrel to reduce stray light has always been one of the research hotspots of those skilled in the art. Summary of the Utility Model

[0004] The first aspect of this application provides such an optical imaging system, which includes: a lens barrel, and a lens group and a spacer element group disposed in the lens barrel. The lens group sequentially includes, from the object side to the image side along the optical axis: a first lens with a negative focal power, a second lens with a positive focal power, a third lens with a positive focal power, a fourth lens with a negative focal power, a fifth lens with a focal power, a sixth lens with a positive focal power, and a seventh lens with a positive focal power. The spacer element group includes a fourth spacer element and a fifth spacer element. Among them, the fourth spacer element is disposed on the image side of the fourth lens and at least partially contacts the image side surface of the fourth lens, and the fifth spacer element is disposed on the image side of the fifth lens and at least partially contacts the image side surface of the fifth lens. Half of the maximum field of view angle Semi-FOV of the optical imaging system satisfies: 59.6° < Semi-FOV ≤ 61.6°; the inner diameter d0m of the image-side end face of the lens barrel and the inner diameter d0s of the object-side end face of the lens barrel satisfy: 4.1 ≤ d0m / d0s ≤ 6.2; the axial distance EP45 from the image side surface of the fourth spacer element to the object side surface of the fifth spacer element, the thickness CP5 of the fifth spacer element along the optical axis direction, and the central thickness CT6 of the sixth lens on the optical axis satisfy: 1.1 ≤ (EP45 + CP5) / CT6 ≤ 1.62.

[0005] In one embodiment, the spacer element group further includes: a sixth spacer element disposed on the image side of the sixth lens and at least partially in contact with the image side surface of the sixth lens; the optical imaging system satisfies: 1.5 ≤ T67 / (T56 + CP6) ≤ 8.2, where T67 is the air gap between the sixth lens and the seventh lens on the optical axis, T56 is the air gap between the fifth lens and the sixth lens on the optical axis, and CP6 is the thickness of the sixth spacer element along the optical axis direction.

[0006] In one embodiment, the spacer element group further includes: a sixth spacer element disposed on the image side of the sixth lens and at least partially in contact with the image side surface of the sixth lens; the optical imaging system satisfies: 1.1 ≤ R14 / R13 < 1.6 and 0.9 < f7 / d6m ≤ 3.7, where R13 is the radius of curvature of the object side surface of the seventh lens, R14 is the radius of curvature of the image side surface of the seventh lens, f7 is the effective focal length of the seventh lens, and d6m is the inner diameter of the image side surface of the sixth spacer element.

[0007] In one embodiment, the optical imaging system satisfies: 0.9 ≤ CT6 / EP45 ≤ 5.5, where CT6 is the central thickness of the sixth lens on the optical axis, and EP45 is the axial distance from the image side surface of the fourth spacer element to the object side surface of the fifth spacer element.

[0008] In one embodiment, the optical imaging system satisfies: 0.6 < CP5 / CT5 < 2.2, where CP5 is the thickness of the fifth spacer element along the optical axis direction, and CT5 is the central thickness of the fifth lens on the optical axis.

[0009] In one embodiment, the optical imaging system satisfies: 2.7 < f6 / (EP45 + CP5) ≤ 5.6, where f6 is the effective focal length of the sixth lens, EP45 is the axial distance from the image side surface of the fourth spacer element to the object side surface of the fifth spacer element, and CP5 is the thickness of the fifth spacer element along the optical axis direction.

[0010] In one embodiment, the optical imaging system satisfies: -7.5 < d5s / R10 - d5m / R11 < -4.9, where d5s is the inner diameter of the object side surface of the fifth spacer element, R10 is the radius of curvature of the image side surface of the fifth lens, d5m is the inner diameter of the image side surface of the fifth spacer element, and R11 is the radius of curvature of the object side surface of the sixth lens.

[0011] In one embodiment, the optical imaging system satisfies: -1.4 ≤ SAG52 / (CP4 + CT5) < -1.2, 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 effective radius of the image side surface of the fifth lens, CP4 is the thickness of the fourth spacer element along the optical axis direction, and CT5 is the central thickness of the fifth lens on the optical axis.

[0012] In one embodiment, the spacer element group further includes: a third spacer element disposed on the image side of the third lens and at least partially in contact with the image side surface of the third lens; the optical imaging system satisfies: 2.0 < (D4s - d4s) / (D3m - d3m) ≤ 3.9, where D4s is the outer diameter of the object side surface of the fourth spacer element, d4s is the inner diameter of the object side surface of the fourth spacer element, D3m is the outer diameter of the image side surface of the third spacer element, and d3m is the inner diameter of the image side surface of the third spacer element.

[0013] In one embodiment, the spacer element group further includes: a second spacer element and a third spacer element, where the second spacer element is disposed on the image side of the second lens and at least partially in contact with the image side surface of the second lens, and the third spacer element is disposed on the image side of the third lens and at least partially in contact with the image side surface of the third lens; the optical imaging system satisfies: 2.1 ≤ CT3 / EP23 ≤ 2.7, where CT3 is the central thickness of the third lens on the optical axis, and EP23 is the axial distance from the image side surface of the second spacer element to the object side surface of the third spacer element.

[0014] In one embodiment, the spacer element group further includes: a second spacer element disposed on the image side of the second lens and at least partially in contact with the image side surface of the second lens; the optical imaging system satisfies: 1.1 ≤ R4 / R3 < 1.3 and 1.9 < (V3 - V2) / f2 × d2s < 4.3, where R3 is the radius of curvature of the object side surface of the second lens, R4 is the radius of curvature of the image side surface of the second lens, V2 is the Abbe number of the second lens, V3 is the Abbe number of the third lens, f2 is the effective focal length of the second lens, and d2s is the inner diameter of the object side surface of the second spacer element.

[0015] In one embodiment, the spacer element group further includes: a first spacer element disposed on the image side of the first lens and at least partially in contact with the image side surface of the first lens; the optical imaging system satisfies: 3.3 ≤ CT1 / (T12 + CP1) < 4.8, where CT1 is the central thickness of the first lens on the optical axis, T12 is the air gap between the first lens and the second lens on the optical axis, and CP1 is the thickness of the first spacer element along the optical axis direction.

[0016] In one embodiment, the spacer element group further includes: a third spacer element disposed on the image side of the third lens and at least partially in contact with the image side surface of the third lens; the optical imaging system satisfies: 2.8 < T34 / (T23 + CP3) ≤ 4.4, where T34 is the air gap between the third lens and the fourth lens on the optical axis, T23 is the air gap between the second lens and the third lens on the optical axis, and CP3 is the thickness of the third spacer element along the optical axis direction.

[0017] In one embodiment, the spacer element group further includes: a first spacer element and a sixth spacer element, wherein the first spacer element is disposed on the image side of the first lens and at least partially contacts the image side surface of the first lens, and the sixth spacer element is disposed on the image side of the sixth lens and at least partially contacts the image side surface of the sixth lens; the optical imaging system satisfies: 4.9 ≤ DT72 / DT11 < 5.5 and 3.5 < d6m / d1s ≤ 4.2, where DT11 is the diameter of the light-transmitting portion of the object side surface of the first lens, DT72 is the diameter of the light-transmitting portion of the image side surface of the seventh lens, d6m is the inner diameter of the image side surface of the sixth spacer element, and d1s is the inner diameter of the object side surface of the first spacer element.

[0018] In one embodiment, the spacer element group further includes: a first spacer element, a second spacer element, and a third spacer element, wherein the first spacer element is disposed on the image side of the first lens and at least partially contacts the image side surface of the first lens, the second spacer element is disposed on the image side of the second lens and at least partially contacts the image side surface of the second lens, and the third spacer element is disposed on the image side of the third lens and at least partially contacts the image side surface of the third lens; the optical imaging system satisfies: 1.1 ≤ d2s / d1s < 1.4, 1.1 ≤ d3s / d2s ≤ 1.3, and 2.2 < T23 / T12 < 2.5, where d1s is the inner diameter of the object side surface of the first spacer element, d2s is the inner diameter of the object side surface of the second spacer element, d3s is the inner diameter of the object side surface of the third spacer element, T23 is the air gap on the optical axis between the second lens and the third lens, and T12 is the air gap on the optical axis between the first lens and the second lens.

[0019] In one embodiment, in the spacer element group, the inner diameter of the object side surface and the inner diameter of the image side surface of the fifth spacer element are the largest.

[0020] A second aspect of the present application provides such an optical imaging system, which includes: a lens barrel and a lens group and a spacer element group disposed in the lens barrel. The lens group sequentially includes, along the optical axis from the object side to the image side: a first lens with a negative optical power, a second lens with a positive optical power, a third lens with a positive optical power, a fourth lens with a negative optical power, a fifth lens with an optical power, a sixth lens with a positive optical power, and a seventh lens with a positive optical power. The spacer element group includes a second spacer element and a third spacer element, wherein the second spacer element is disposed on the image side of the second lens and at least partially contacts the image side surface of the second lens, and the third spacer element is disposed on the image side of the third lens and at least partially contacts the image side surface of the third lens. The optical imaging system satisfies: 2.1 ≤ CT3 / EP23 ≤ 2.7, where CT3 is the central thickness of the third lens on the optical axis, and EP23 is the axial distance from the image side surface of the second spacer element to the object side surface of the third spacer element.

[0021] A third aspect of the present application provides an optical imaging system, which includes a lens barrel and a lens group and a spacer element group disposed in the lens barrel. The lens group sequentially includes, from the object side to the image side along the optical axis: a first lens with a negative focal power, a second lens with a positive focal power, a third lens with a positive focal power, a fourth lens with a negative focal power, a fifth lens with a focal power, a sixth lens with a positive focal power, and a seventh lens with a positive focal power. The spacer element group includes a third spacer element, and the third spacer element is disposed on the image side of the third lens and at least partially contacts the image side surface of the third lens. The optical imaging system satisfies: 2.8 < T34 / (T23 + CP3) ≤ 4.4, where T34 is the air gap between the third lens and the fourth lens on the optical axis, T23 is the air gap between the second lens and the third lens on the optical axis, and CP3 is the thickness of the third spacer element along the optical axis direction.

[0022] The present application provides a seven-lens optical imaging system, which reasonably designs the arrangement of the focal powers of each lens and satisfies: 59.6° < Semi-FOV ≤ 61.6°, 4.1 ≤ d0m / d0s ≤ 6.2, and 1.1 ≤ (EP45 + CP5) / CT6 ≤ 1.62. While achieving the wide-angle feature, it controls the inner diameters of the object-side end face and the image-side end face of the lens barrel to prevent the object-side end and the image-side end of the lens barrel from blocking light and avoid the generation of stray light; further, it also controls EP45, CP5, and CT6, which helps to adjust the field curvature, improve the light-gathering ability of the optical system, enhance the imaging clarity, and also improve the matching degree between the CRA of the lens edge field of view and the CRA of the chip, reducing the risk of color cast; in addition, it can effectively eliminate problems such as defocus, chromatic aberration, and distortion caused by the air gap, and at the same time intercept the ineffective optical paths reflected by the non-light-transmitting regions of the lenses, which is beneficial to improving the optical performance, reducing the stray light spots, and improving the imaging quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Other features, objects, and advantages of the present application will become more apparent by reading the detailed description of the non-limiting embodiments with reference to the following drawings:

[0024] Figure 1 shows a schematic structural diagram of an optical imaging system according to the present application and a schematic diagram of some parameters;

[0025] Figure 2A shows a schematic structural diagram of the optical imaging system according to Embodiment 1 of the present application;

[0026] Figure 2B shows a schematic structural diagram of the optical imaging system according to Embodiment 2 of the present application;

[0027] Figure 2C shows a schematic structural diagram of the optical imaging system according to Embodiment 3 of the present application;

[0028] Figure 3A and Figure 3B respectively show the axial chromatic aberration curve and the astigmatism curve of the optical imaging system according to Embodiment 1, Embodiment 2, and Embodiment 3 of the present application;

[0029] Figure 4A shows a schematic structural diagram of the optical imaging system according to Embodiment 4 of the present application;

[0030] Figure 4B shows a schematic structural diagram of the optical imaging system according to Embodiment 5 of the present application;

[0031] Figure 4C shows a schematic structural diagram of the optical imaging system according to Embodiment 6 of the present application;

[0032] Figure 5A and Figure 5B respectively show the axial chromatic aberration curve and the astigmatism curve of the optical imaging system according to Embodiment 4, Embodiment 5, and Embodiment 6 of the present application;

[0033] Fig. 6A shows a schematic structural diagram of the optical imaging system according to Embodiment 7 of the present application;

[0034] Figure 6B shows a schematic structural diagram of the optical imaging system according to Embodiment 8 of the present application;

[0035] Figure 6C shows a schematic structural diagram of the optical imaging system according to Embodiment 9 of the present application;

[0036] Fig. 7A and Figure 7B respectively show the axial chromatic aberration curve and the astigmatism curve of the optical imaging system according to Embodiment 7, Embodiment 8, and Embodiment 9 of the present application;

[0037] Figure 8 shows the stray light energy map on the imaging plane when the optical imaging system satisfies Semi - FOV = 61°, d0m / d0s = 5.1, (EP45 + CP5) / CT6 = 1.4;

[0038] Fig. 9 shows the stray light energy map on the imaging plane when the optical imaging system satisfies Semi - FOV = 61°, d0m / d0s = 5.1, (EP45 + CP5) / CT6 = 1.4;

[0039] Fig.10 shows the stray light energy map on the imaging plane when the optical imaging system satisfies Semi - FOV = 61°, d0m / d0s = 0.5, (EP45 + CP5) / CT6 = 0.1; and

[0040] Fig.11 Shows the stray light energy map on the imaging plane when the optical imaging system satisfies Semi - FOV = 61°, d0m / d0s = 12, and (EP45 + CP5) / CT6 = 8. Detailed implementation manners

[0041] To better understand the present application, more detailed descriptions of various aspects of the present application will be made with reference to the accompanying drawings. It should be understood that these detailed descriptions are only descriptions of the exemplary embodiments of the present application and do not limit the scope of the present application in any way. Throughout the specification, the same reference numerals refer to the same elements. The expression "and / or" includes any and all combinations of one or more of the associated listed items.

[0042] It should be noted that in this specification, the expressions such as first, second, third, etc. are only used to distinguish one feature from another feature and do not represent any limitation on the features. Therefore, without departing from the teachings of the present application, the first lens discussed below may also be referred to as the second lens or the third lens.

[0043] In the drawings, for the sake of convenience of illustration, the thickness, size and shape of the lens have been slightly exaggerated. Specifically, the spherical or aspherical shapes shown in the drawings are shown by way of example. That is, the spherical or aspherical shapes are not limited to the spherical or aspherical shapes shown in the drawings. The drawings are only examples and are not drawn strictly to scale.

[0044] In this article, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the position of the convex surface is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the position of the concave surface is not defined, it means that the lens surface is concave at least in the paraxial region. The surface of each lens close to the object to be photographed is called the object side surface of the lens, and the surface of each lens close to the imaging surface is called the image side surface of the lens.

[0045] It should also be understood that the terms "comprises", "comprising", "has", "including" and / or "including having", 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 their combinations. In addition, when an expression such as "at least one of..." appears after the list of listed features, it modifies the entire list of listed features rather than individual elements in the list. In addition, when describing the embodiments of the present application, the use of "may" means "one or more embodiments of the present application". And the term "exemplary" is intended to refer to an example or illustration.

[0046] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It should also be understood that terms (such as those defined in a common dictionary) should be interpreted as having a meaning consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

[0047] It should be noted that, without conflict, the embodiments and features in the embodiments of this application may be combined with each other. The following embodiments only represent several implementation manners of this application, and their descriptions are relatively specific and detailed, but should not be construed as limiting the patent scope of this application. It should be pointed out that for those of ordinary skill in the art, without departing from the concept of this application, several modifications and improvements can be made, and these all belong to the protection scope of this application. For example, the lens groups, lens barrels, and spacer elements in the embodiments of this application can be arbitrarily combined, and it is not limited that the lens group in one embodiment can only be combined with the lens barrel, spacer element, etc. of this embodiment.

[0048] The present application will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

[0049] An optical imaging system according to an exemplary embodiment of the present application includes a lens group and a spacer element group. The lens group may include seven lenses having optical powers, namely a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens. These seven lenses are arranged in sequence along the optical axis from the object side to the image side. There may be a spacing distance between any two adjacent lenses among the first lens to the seventh lens.

[0050] In the exemplary embodiment, the first lens may have a negative optical power, the second lens may have a positive optical power, the third lens may have a positive optical power, the fourth lens may have a negative optical power, the fifth lens may have a positive or negative optical power, the sixth lens may have a positive optical power, and the seventh lens may have a positive optical power.

[0051] In an exemplary embodiment, the spacer element group of the optical imaging system may include at least one of a first spacer element, a second spacer element, a third spacer element, a fourth spacer element, a fifth spacer element, and a sixth spacer element. The first spacer element is disposed on the image side of the first lens and at least partially contacts the image side surface of the first lens. The second spacer element is disposed on the image side of the second lens and at least partially contacts the image side surface of the second lens. The third spacer element is disposed on the image side of the third lens and at least partially contacts the image side surface of the third lens. The fourth spacer element is disposed on the image side of the fourth lens and at least partially contacts the image side surface of the fourth lens. The fifth spacer element is disposed on the image side of the fifth lens and at least partially contacts the image side surface of the fifth lens. The sixth spacer element is disposed on the image side of the sixth lens and at least partially contacts the image side surface of the sixth lens.

[0052] It should be understood that the present application does not specifically limit the number of spacer elements. Any number of spacer elements may be included between any two lenses, and the entire optical imaging system may also include any number of spacer elements. The spacer elements help the optical imaging system intercept redundant catadioptric light paths, reducing the generation of stray light and ghost images. The spacer elements also help increase the auxiliary support between the lens and the lens barrel, which is beneficial to improving problems such as poor assembly stability and low performance yield caused by large step differences between lenses.

[0053] In an exemplary embodiment, the spacer element group may include: a fourth spacer element and a fifth spacer element, wherein the fourth spacer element is disposed on the image side of the fourth lens and at least partially contacts the image side surface of the fourth lens, and the fifth spacer element is disposed on the image side of the fifth lens and at least partially contacts the image side surface of the fifth lens.

[0054] The optical imaging system according to an exemplary embodiment of the present application further includes a lens barrel for accommodating the lenses and the spacer elements.

[0055] Figure 1 A schematic structural diagram of an optical imaging system according to the present application and a schematic diagram of some parameters are shown. Figure 1 The reference numerals of the lens barrel, the lenses, and the spacer elements are not shown, and may be combined with Figure 2A the reference numerals of the lens barrel, the lenses, and the spacer elements of the optical imaging system of Embodiment 1 of the present application shown. As Figure 1 and Figure 2A shown, an optical imaging system of the present application may include a lens barrel P0, a lens group, and a spacer element group. The lens group sequentially includes, from the object side to the image side along the optical axis: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, and a seventh lens E7. The spacer element group includes a second spacer element P2, a third spacer element P3, a fourth spacer element P4, a fifth spacer element P5, and a sixth spacer element P6.

[0056] like Figure 1 As shown, CP1 is the thickness of the first spacing element along the optical axis, CP3 is the thickness of the third spacing element along the optical axis, CP4 is the thickness of the fourth spacing element along the optical axis, CP5 is the thickness of the fifth spacing element along the optical axis, CP6 is the thickness of the sixth spacing element along the optical axis, EP23 is the axial distance from the image side surface of the second spacing element to the object side surface of the third spacing element, EP45 is the axial distance from the image side surface of the fourth spacing element to the object side surface of the fifth spacing element, d1s is the inner diameter of the object side surface of the first spacing element, and d2s is the inner diameter of the The inner diameter of the object side surface of the second spacing element, d3s is the inner diameter of the object side surface of the third spacing element, the inner diameter of the object side end surface of the lens barrel is d0s, d4s is the inner diameter of the object side surface of the fourth spacing element, d5s is the inner diameter of the object side surface of the fifth spacing element, D4s is the outer diameter of the object side surface of the fourth spacing element, d3m is the inner diameter of the image side surface of the third spacing element, D3m is the outer diameter of the image side surface of the third spacing element, d6m is the inner diameter of the image side surface of the sixth spacing element, d5m is the inner diameter of the image side surface of the fifth spacing element, and d0m is the inner diameter of the image side end surface of the lens barrel.

[0057] Those skilled in the art should understand that some parameters of lenses commonly used in the art (such as the center thickness CT1 of the first lens on the optical axis) are not included in the description. Figure 1 It is shown in Figure 1 Only partial parameters of a lens barrel and a spacer element of an optical imaging system of the present application are exemplified to facilitate a better understanding of the present invention.

[0058] In an exemplary embodiment, at least one trimmed lens may be included in the lens group. The outer peripheral surface of the trimmed lens may have a trimmed portion and a non-trimmed portion, and the outer diameter of the trimmed portion of the lens is smaller than the outer diameter of the non-trimmed portion of the lens. When the outer peripheral surface of the lens has a trimmed portion, the outer diameter of the lens generally refers to the outer diameter of the non-trimmed portion of the lens.

[0059] In an exemplary embodiment, at least one trimmed spacer element may be included in the spacer element group. The outer circumference of the trimmed spacer element may have a trimmed portion and a non-trimmed portion, and the outer diameter of the trimmed portion of the spacer element is smaller than the outer diameter of the non-trimmed portion of the spacer element. When the outer circumference of the trimmed spacer element has a trimmed portion, the outer diameter of the spacer element generally refers to the maximum outer diameter of the non-trimmed portion.

[0060] In an exemplary embodiment, half of the maximum field of view (Semi-FOV) of the optical imaging system according to the present application satisfies: 59.6° <Semi-FOV≤61.6°,使光学成像系统具有大视场的特点。

[0061] In an exemplary embodiment, the optical imaging system according to the present application may satisfy: 4.1 ≤ d0m / d0s ≤ 6.2, where d0m is the inner diameter of the image-side end face of the lens barrel, and d0s is the inner diameter of the object-side end face of the lens barrel. By controlling the inner diameters of the object-side end face and the image-side end face of the lens barrel, it is possible to prevent the object-side end and the image-side end of the lens barrel from blocking light and avoid the generation of stray light.

[0062] In an exemplary embodiment, the optical imaging system according to the present application may satisfy: 1.1 ≤ (EP45 + CP5) / CT6 ≤ 1.62, where EP45 is the on-axis distance from the image-side face of the fourth spacer element to the object-side face of the fifth spacer element, CP5 is the thickness of the fifth spacer element along the optical axis direction, and CT6 is the central thickness of the sixth lens on the optical axis. Controlling EP45, that is, controlling the edge thickness of the fifth lens, and making the ratio of the sum of the edge thickness and the central thickness of the fifth lens to the central thickness of the sixth lens satisfy 1.1 ≤ (EP45 + CP5) / CT6 ≤ 1.62, helps to adjust the field curvature. At the same time, it can improve the light-gathering ability of the optical imaging system, enhance the imaging clarity, and also improve the matching degree between the CRA of the lens edge field of view and the CRA of the chip, reducing the risk of color cast. In addition, satisfying 1.1 ≤ (EP45 + CP5) / CT6 ≤ 1.62 can effectively eliminate problems such as defocus, chromatic aberration, and distortion caused by the air gap, and at the same time intercept the ineffective optical paths where light is reflected in the non-light-transmitting area of the lens, which is beneficial to improving the optical performance, reducing the stray light spot, and improving the imaging quality.

[0063] An optical imaging system according to an exemplary embodiment of the present application may include a lens barrel, a lens group, and a spacer element group disposed in the lens barrel. The lens group may include a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens. The first lens may have a negative optical power, the second lens may have a positive optical power, the third lens may have a positive optical power, the fourth lens may have a negative optical power, the fifth lens may have a positive or negative optical power, the sixth lens may have a positive optical power, and the seventh lens may have a positive optical power. The spacer element group may include a fourth spacer element and a fifth spacer element. Among them, the fourth spacer element is disposed on the image side of the fourth lens and is at least partially in contact with the image side surface of the fourth lens, and the fifth spacer element is disposed on the image side of the fifth lens and is at least partially in contact with the image side surface of the fifth lens. The optical imaging system may satisfy: 59.6° < Semi-FOV ≤ 61.6°, 4.1 ≤ d0m / d0s ≤ 6.2, and 1.1 ≤ (EP45 + CP5) / CT6 ≤ 1.62, where Semi-FOV is half of the maximum field of view angle of the optical imaging system, d0m is the inner diameter of the image side end face of the lens barrel, d0s is the inner diameter of the object side end face of the lens barrel, EP45 is the on-axis distance from the image side surface of the fourth spacer element to the object side surface of the fifth spacer element, CP5 is the thickness of the fifth spacer element along the optical axis direction, and CT6 is the central thickness of the sixth lens on the optical axis. In the present application, the arrangement of the optical powers of the lenses is reasonably designed. While satisfying the wide-angle characteristics, by controlling the inner diameters of the object side end face and the image side end face of the lens barrel, it is possible to prevent the object side end and the image side end of the lens barrel from blocking light, avoid generating stray light. At the same time, by controlling the ratio of the sum of the edge thickness and the central thickness of the fifth lens to the central thickness of the sixth lens to meet a reasonable range, while adjusting the field curvature, the light-gathering ability of the optical system can be improved, the imaging clarity can be increased, and the matching degree between the CRA of the lens edge field of view and the CRA of the chip can be improved, reducing the risk of color cast; in addition, satisfying 1.1 ≤ (EP45 + CP5) / CT6 ≤ 1.62 can effectively eliminate problems such as defocus, chromatic aberration, and distortion caused by the air gap, and at the same time intercept the ineffective optical paths reflected by the non-light-transmitting regions of the lenses, which is beneficial to improving the optical performance, reducing the stray light spots, and improving the imaging quality.

[0064] The optical imaging system of the present application satisfies 59.6° < Semi-FOV ≤ 61.6°, 4.1 ≤ d0m / d0s ≤ 6.2, and 1.1 ≤ (EP45 + CP5) / CT6 ≤ 1.62. While satisfying the wide-angle characteristics, by controlling the inner diameters of the object side end face and the image side end face of the lens barrel, it is possible to prevent the object side end and the image side end of the lens barrel from blocking light, avoid generating stray light. In addition, by controlling the ratio of the sum of the edge thickness and the central thickness of the fifth lens to the central thickness of the sixth lens to meet a reasonable range, intercept the ineffective optical paths reflected by the non-light-transmitting regions of the lenses, which is beneficial to improving the optical performance, reducing the stray light spots, and improving the imaging quality. The following is combined with Figures 8 to 11, further illustrate the effect of the technical solution of the present application on reducing the stray light risk and improving the imaging quality.

[0065] Figure 8 Shows the stray light energy map on the imaging surface of the optical imaging system 1 when Semi-FOV = 61°, d0m / d0s = 5.1, and (EP45 + CP5) / CT6 = 1.4; Fig. 9 Shows the stray light energy map on the imaging surface of the optical imaging system 1 when Semi-FOV = 61°, d0m / d0s = 5.1, and (EP45 + CP5) / CT6 = 1.4; Fig.10 Shows the stray light energy map on the imaging surface of the optical imaging system 2 when Semi-FOV = 61°, d0m / d0s = 0.5, and (EP45 + CP5) / CT6 = 0.1; Fig.11 Shows the stray light energy map on the imaging surface of the optical imaging system 3 when Semi-FOV = 61°, d0m / d0s = 12, and (EP45 + CP5) / CT6 = 8.

[0066] Among them, Figure 8 , Fig.10 and Fig.11 are the same shooting angles. By comparing Figure 8 , Fig.10 and Fig.11 , it can be known that Figure 8 both the d0m / d0s and (EP45 + CP5) / CT6 of the optical imaging system 1 shown satisfy the ranges of 4.1 ≤ d0m / d0s ≤ 6.2 and 1.1 ≤ (EP45 + CP5) / CT6 ≤ 1.62 of the present application, and the distribution range of the stray light spots on the imaging surface is small and the energy is weak; while Fig.10 the optical imaging system 2 shown and Fig.11 the optical imaging system 3 shown do not satisfy the ranges of 4.1 ≤ d0m / d0s ≤ 6.2 and 1.1 ≤ (EP45 + CP5) / CT6 ≤ 1.62 of the present application, and the distribution range of the stray light spots on their imaging surfaces is large and the energy is strong.

[0067] In addition, Fig. 9 shows the stray light energy map on the imaging surface of the optical imaging system 1 at another shooting angle, and the energy of the stray light spots on the imaging surface is weak.

[0068] In an exemplary embodiment, the optical imaging system according to the present application can satisfy: 1.5 ≤ T67 / (T56 + CP6) ≤ 8.2, where T67 is the air gap between the sixth lens and the seventh lens on the optical axis, T56 is the air gap between the fifth lens and the sixth lens on the optical axis, and CP6 is the thickness of the sixth spacer element along the optical axis direction. Satisfying 1.5 ≤ T67 / (T56 + CP6) ≤ 8.2 can constrain the thickness of the sixth spacer element within a reasonable range, greatly reduce the assembly deformation and baking deformation of the sixth spacer element, and further reduce the risks of assembly deformation and baking deformation; it can also control the air gaps between the fifth lens, the sixth lens, and the seventh lens on the optical axis within a reasonable range and keep them stable, which is beneficial to improving the assembly stability and consistency, and is more conducive to adjusting the field curvature and enhancing the lens performance.

[0069] In an exemplary embodiment, the optical imaging system according to the present application can satisfy: 1.1 ≤ R14 / R13 < 1.6 and 0.9 < f7 / d6m ≤ 3.7, where R13 is the radius of curvature of the object side surface of the seventh lens, R14 is the radius of curvature of the image side surface of the seventh lens, f7 is the effective focal length of the seventh lens, and d6m is the inner diameter of the image side surface of the sixth spacer element. By controlling the radius of curvature of the seventh lens and the effective focal length of the seventh lens, the processability of the seventh lens can be improved, the surface shape deviation, distortion, and appearance problems caused by molding can be reduced, and the production yield of the lens can be increased; in addition, by controlling the inner diameter of the image side surface of the sixth spacer element, the stray light rays generated by the sixth lens can be effectively blocked, avoiding the generation of stray light and improving the imaging quality.

[0070] In an exemplary embodiment, the optical imaging system according to the present application can satisfy: 0.9 ≤ CT6 / EP45 ≤ 5.5, where CT6 is the central thickness of the sixth lens on the optical axis, and EP45 is the axial distance from the image side surface of the fourth spacer element to the object side surface of the fifth spacer element. Satisfying 0.9 ≤ CT6 / EP45 ≤ 5.5 can control the central thickness of the sixth lens on the optical axis, effectively reduce the risk of welding marks of the sixth lens, avoid the stray light of the welding marks, and improve the imaging quality.

[0071] In an exemplary embodiment, the optical imaging system according to the present application can satisfy: 0.6 < CP5 / CT5 < 2.2, where CP5 is the thickness of the fifth spacer element along the optical axis direction, and CT5 is the central thickness of the fifth lens on the optical axis. Satisfying 0.6 < CP5 / CT5 < 2.2 can control the thickness of the fifth spacer element, ensure that there is no obvious deformation after the fifth spacer element is assembled, and there is no obvious deformation during the high-temperature baking process, improve the light blocking efficiency, and reduce the risk of stray light; in addition, it can also control the central thickness of the fifth lens on the optical axis, effectively reduce the risk of welding marks of the fifth lens, avoid the stray light of the welding marks, and improve the imaging quality.

[0072] In an exemplary embodiment, the optical imaging system according to the present application may satisfy: 2.7 < f6 / (EP45 + CP5) ≤ 5.6, where f6 is the effective focal length of the sixth lens, EP45 is the on-axis distance from the image side of the fourth spacer element to the object side of the fifth spacer element, and CP5 is the thickness of the fifth spacer element along the optical axis direction. Satisfying 2.7 < f6 / (EP45 + CP5) ≤ 5.6 can control the edge thickness of the fifth lens and the effective focal length of the sixth lens, which is beneficial to balancing the back focal length of the optical imaging system, enabling the imaging focal plane of the optical system to reach a relatively stable position, and thus improving the stability of the lens during use.

[0073] In an exemplary embodiment, the optical imaging system according to the present application may satisfy: -7.5 < d5s / R10 - d5m / R11 < -4.9, where d5s is the inner diameter of the object side of the fifth spacer element, R10 is the radius of curvature of the image side of the fifth lens, d5m is the inner diameter of the image side of the fifth spacer element, and R11 is the radius of curvature of the object side of the sixth lens. Satisfying -7.5 < d5s / R10 - d5m / R11 < -4.9 and controlling the radii of curvature of the object side of the sixth lens and the image side of the fifth lens can improve the processability of the fifth lens and the sixth lens, reduce the surface shape deviation, distortion, and appearance problems caused by molding, and improve the production yield of the lens; in addition, by controlling the inner diameters of the object side and the image side of the fifth spacer element, it can effectively block the stray light rays generated by the fifth lens from entering the sixth lens, avoid the generation of stray light, and improve the imaging quality.

[0074] In an exemplary embodiment, the optical imaging system according to the present application may satisfy: -1.4 ≤ SAG52 / (CP4 + CT5) < -1.2, where SAG52 is the on-axis distance between the intersection of the image side of the fifth lens and the optical axis and the vertex of the effective radius of the image side of the fifth lens, CP4 is the thickness of the fourth spacer element along the optical axis direction, and CT5 is the central thickness of the fifth lens on the optical axis. Satisfying -1.4 ≤ SAG52 / (CP4 + CT5) < -1.2 can improve the smoothness and formability of the effective surface (the aspherical surface for transmitting effective light rays) of the fifth lens, ensure that the fifth lens does not have a large bending surface shape, improve the stability during lens assembly, reduce assembly deformation, and improve the imaging quality.

[0075] In an exemplary embodiment, the optical imaging system according to the present application may satisfy: 2.0 < (D4s - d4s) / (D3m - d3m) ≤ 3.9, where D4s is the outer diameter of the object side surface of the fourth spacer element, d4s is the inner diameter of the object side surface of the fourth spacer element, D3m is the outer diameter of the image side surface of the third spacer element, and d3m is the inner diameter of the image side surface of the third spacer element. Satisfying 2.0 < (D4s - d4s) / (D3m - d3m) ≤ 3.9 can effectively improve the light shielding efficiency of the third spacer element and the fourth spacer element. Further, when the inner and outer diameters of the third spacer element and the fourth spacer element are within this range, the risks of baking deformation and assembly eccentricity of the third spacer element and the fourth spacer element can be significantly reduced, and the probability of light leakage and stray light generated due to the deformation and assembly eccentricity of the spacer elements can be reduced.

[0076] In an exemplary embodiment, the optical imaging system according to the present application may satisfy: 2.1 ≤ CT3 / EP23 ≤ 2.7, where CT3 is the central thickness of the third lens on the optical axis, and EP23 is the axial distance from the image side surface of the second spacer element to the object side surface of the third spacer element. Satisfying 2.1 ≤ CT3 / EP23 ≤ 2.7 can control the central thickness and edge thickness of the third lens within a relatively reasonable range, reduce the risk of welding marks during the molding of the third lens, thereby reducing the risk of stray light caused by welding marks, improving the cleanliness of the lens imaging, reducing the demolding force when the plastic lens is demolded after molding, reducing the problem of surface shape deviation from the design curve caused by lens demolding deformation, and improving the MTF quality of the lens.

[0077] In an exemplary embodiment, the optical imaging system according to the present application may satisfy: 1.1 ≤ R4 / R3 < 1.3 and 1.9 < (V3 - V2) / f2 × d2s < 4.3, where R3 is the radius of curvature of the object side surface of the second lens, R4 is the radius of curvature of the image side surface of the second lens, V2 is the Abbe number of the second lens, V3 is the Abbe number of the third lens, f2 is the effective focal length of the second lens, and d2s is the inner diameter of the object side surface of the second spacer element. When optimizing the design of the optical imaging system, by selecting materials with different dispersion coefficients for the second lens and the third lens, the chromatic aberration of the optical imaging system can be reduced, and the overall imaging effect of the optical imaging system can be improved; at the same time, the light converging ability of the optical imaging system can be improved, and the imaging clarity can be increased; in addition, the control of the inner diameter of the object side surface of the second spacer element is beneficial to blocking the stray light path generated by the second lens and improving the imaging quality of the lens.

[0078] In an exemplary embodiment, the optical imaging system according to the present application may satisfy: 3.3 ≤ CT1 / (T12 + CP1) < 4.8, where CT1 is the central thickness of the first lens on the optical axis, T12 is the air gap between the first lens and the second lens on the optical axis, and CP1 is the thickness of the first spacer element in the optical axis direction. Satisfying 3.3 ≤ CT1 / (T12 + CP1) < 4.8 controls the central thickness of the first lens within a relatively reasonable range, and at the same time controls the air gap between the first lens and the second lens on the optical axis and the maximum thickness of the first spacer element, avoiding assembly interference and making it more convenient to adjust the field curvature later.

[0079] In an exemplary embodiment, the optical imaging system according to the present application may satisfy: 2.8 < T34 / (T23 + CP3) ≤ 4.4, where T34 is the air gap between the third lens and the fourth lens on the optical axis, T23 is the air gap between the second lens and the third lens on the optical axis, and CP3 is the thickness of the third spacer element in the optical axis direction. Satisfying 2.8 < T34 / (T23 + CP3) ≤ 4.4 can, on the one hand, greatly reduce the assembly deformation and baking deformation of the third spacer element by restricting the thickness of the third spacer element within a reasonable range, thereby reducing the risks of assembly deformation and baking deformation; on the other hand, it can control the air gap between the second lens, the third lens and the fourth lens on the optical axis within a reasonable range and keep it stable, which is beneficial to improving the assembly stability and consistency, and is more conducive to adjusting the field curvature and improving the lens performance.

[0080] In an exemplary embodiment, the optical imaging system according to the present application may satisfy: 4.9 ≤ DT72 / DT11 < 5.5 and 3.5 < d6m / d1s ≤ 4.2, where DT11 is the diameter of the light-transmitting part of the object side of the first lens, DT72 is the diameter of the light-transmitting part of the image side of the seventh lens, d6m is the inner diameter of the image side of the sixth spacer element, and d1s is the inner diameter of the object side of the first spacer element. Satisfying 4.9 ≤ DT72 / DT11 < 5.5 and 3.5 < d6m / d1s ≤ 4.2 can improve the smoothness and formability of the effective surfaces (aspherical surfaces for transmitting effective light) of the first lens and the seventh lens, ensure that the first lens and the seventh lens do not have large curved surface shapes, improve the stability during lens assembly, reduce assembly deformation, and improve the imaging quality; at the same time, controlling the inner diameters of the first spacer element and the sixth spacer element is beneficial to improving the light blocking efficiency of the first spacer element and the sixth spacer element and reducing the risk of stray light.

[0081] In an exemplary embodiment, the optical imaging system according to the present application may satisfy: 1.1 ≤ d2s / d1s < 1.4, 1.1 ≤ d3s / d2s ≤ 1.3, and 2.2 < T23 / T12 < 2.5, where d1s is the inner diameter of the object side surface of the first spacer element, d2s is the inner diameter of the object side surface of the second spacer element, d3s is the inner diameter of the object side surface of the third spacer element, T23 is the air gap between the second lens and the third lens on the optical axis, and T12 is the air gap between the first lens and the second lens on the optical axis. Satisfying 1.1 ≤ d2s / d1s < 1.4, 1.1 ≤ d3s / d2s ≤ 1.3, and 2.2 < T23 / T12 < 2.5 is beneficial to ensuring that the inner diameter of the second spacer element is always greater than that of the first spacer element, the inner diameter of the third spacer element is always greater than that of the second spacer element, so that the inner diameter of the subsequent spacer element is greater than that of the previous spacer element, avoiding stray light generated when light hits its inner diameter surface, and improving the imaging quality; in addition, controlling the air gaps between the first lens, the second lens, and the third lens on the optical axis is beneficial to avoiding assembly interference and is more convenient for adjusting the field curvature in the later stage.

[0082] In an exemplary embodiment, among all the spacer elements of the optical imaging system according to the present application, the inner diameter of the object side surface and the inner diameter of the image side surface of the fifth spacer element are the largest, which can effectively avoid stray light generated when light hits its inner diameter surface and improve the imaging quality.

[0083] The optical imaging system according to an exemplary embodiment of the present application may include a lens barrel and a lens group and a spacer element group disposed in the lens barrel. The lens group may include a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens. The first lens may have a negative optical power, the second lens may have a positive optical power, the third lens may have a positive optical power, the fourth lens may have a negative optical power, the fifth lens may have a positive or negative optical power, the sixth lens may have a positive optical power, and the seventh lens may have a positive optical power. The spacer element group may include: a second spacer element and a third spacer element, where the second spacer element is disposed on the image side of the second lens and at least partially contacts the image side surface of the second lens, and the third spacer element is disposed on the image side of the third lens and at least partially contacts the image side surface of the third lens. The optical imaging system may satisfy: 2.1 ≤ CT3 / EP23 ≤ 2.7, where CT3 is the central thickness of the third lens on the optical axis, and EP23 is the axial distance from the image side surface of the second spacer element to the object side surface of the third spacer element. By controlling the central thickness and the edge thickness of the third lens within a relatively reasonable range, the risk of welding marks during the molding of the third lens can be reduced, thereby reducing the risk of stray light caused by welding marks, improving the cleanliness of the lens imaging, reducing the demolding force when the plastic lens is demolded after molding, reducing the problem of surface shape deviation from the designed curve caused by lens demolding deformation, and improving the MTF quality of the lens.

[0084] An optical imaging system according to an exemplary embodiment of the present application may include a lens barrel, a lens group, and a spacer element group disposed in the lens barrel. The lens group may include a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens. The first lens may have a negative optical power, the second lens may have a positive optical power, the third lens may have a positive optical power, the fourth lens may have a negative optical power, the fifth lens may have a positive or negative optical power, the sixth lens may have a positive optical power, and the seventh lens may have a positive optical power. The spacer element group may include a third spacer element disposed on the image side of the second lens and at least partially in contact with the image side surface of the second lens. The optical imaging system may satisfy: 2.8 < T34 / (T23 + CP3) ≤ 4.4, where T34 is the air gap on the optical axis between the third lens and the fourth lens, T23 is the air gap on the optical axis between the second lens and the third lens, and CP3 is the thickness of the third spacer element in the optical axis direction. Satisfying 2.8 < T34 / (T23 + CP3) ≤ 4.4, on the one hand, by restricting the thickness of the third spacer element within a reasonable range, the assembly deformation and baking deformation of the third spacer element can be significantly reduced, thereby reducing the risks of assembly deformation and baking deformation; on the other hand, the air gaps on the optical axis between the second lens, the third lens, and the fourth lens can be controlled within a reasonable range and remain stable, which is beneficial to improving the assembly stability and consistency, and is more beneficial to adjusting the field curvature and enhancing the lens performance.

[0085] In an embodiment of the present 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 surface of the first lens to the image side surface of the seventh lens is an aspherical mirror surface. The characteristics of an aspherical lens are that the curvature changes continuously from the center of the lens to the periphery of the lens. Different from a spherical lens with a constant curvature from the center of the lens to the periphery of the lens, an aspherical lens has better curvature radius characteristics and has the advantages of improving distortion aberration and astigmatism aberration. After using an aspherical lens, it is possible to eliminate the aberration that appears during imaging as much as possible, thereby improving the imaging quality. Optionally, the object side surfaces and image side surfaces of all the lenses from the first lens to the seventh lens are aspherical mirror surfaces.

[0086] In an exemplary embodiment, according to needs, the optical imaging system of the present application may further include a filter and / or a protective glass disposed between the seventh lens and the imaging surface. The filter can filter light rays with different wavelengths, and the protective glass can prevent damage to the image-side elements (such as chips) of the optical lens.

[0087] The optical imaging system according to the above embodiments of the present application may employ multiple lenses, such as seven lenses as described above. The optical imaging system provided by the present application has at least one of the imaging advantages such as a large viewing angle, high pixels, high definition, and high picture cleanliness, and each structural element has good processability. However, those skilled in the art should understand that without departing from the technical solutions claimed in the present application, the number of lenses constituting the optical imaging system can be changed to obtain the various results and advantages described in this specification. For example, although seven lenses are described as an example in the embodiments, the optical imaging system is not limited to including seven lenses. If necessary, the optical imaging system may also include other numbers of lenses.

[0088] Specific embodiments of the optical imaging system applicable to the above embodiments will be further described below with reference to the accompanying drawings. Specifically, refer to FIG. 2A to FIG. 3B Describe the optical imaging system 1001 according to Embodiment 1 of the present application, the optical imaging system 1002 according to Embodiment 2, and the optical imaging system 1003 according to Embodiment 3; refer to FIG. 4A to FIG. 5B Describe the optical imaging system 2001 according to Embodiment 4 of the present application, the optical imaging system 2002 according to Embodiment 5, and the optical imaging system 2003 according to Embodiment 6; refer to 6A to 7B Describe the optical imaging system 3001 according to Embodiment 7 of the present application, the optical imaging system 3002 according to Embodiment 8, and the optical imaging system 3003 according to Embodiment 9.

[0089] Example 1

[0090] Figure 2A The structural schematic diagram of the optical imaging system 1001 according to Embodiment 1 of the present application is shown. As Figure 2A shown, the optical imaging system 1001 includes a lens barrel P0, a lens group, and a spacer element group.

[0091] As Figure 2A shown, the lens group includes, in order from the object side to the image side: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, and a seventh lens E7. The first lens E1 has an object side surface S1 and an image side surface S2. The second lens E2 has an object side surface S3 and an image side surface S4. The third lens E3 has an object side surface S5 and an image side surface S6. The fourth lens E4 has an object side surface S7 and an image side surface S8. The fifth lens E5 has an object side surface S9 and an image side surface S10. The sixth lens E6 has an object side surface S11 and an image side surface S12. The seventh lens E7 has an object side surface S13 and an image side surface S14.

[0092] The optical imaging system 1001 further includes a filter (not shown) for correcting color deviation, and the filter has an object side S15 and an image side S16. The optical imaging system 1001 further includes a stop STO (not shown) disposed on the object side of the first lens. Light from the object sequentially passes through the surfaces S1 to S16 and finally forms an image on an imaging surface (not shown).

[0093] Table 1 shows the basic parameter table of the lens group of the optical imaging system 1001 in Embodiment 1, where the units of the radius of curvature, thickness / distance, and effective focal length are all millimeters (mm).

[0094]

[0095]

[0096] Table 1

[0097] In Embodiment 1, the object side and the image side of any one of the first lens E1 to the seventh lens E7 are aspherical surfaces, and the surface profile x of each aspherical lens can be defined by, but not limited to, the following aspherical formula:

[0098]

[0099] where x is the sagitta, the distance from the vertex of the aspherical surface at the position with a height of h along the optical axis direction; c is the paraxial curvature of the aspherical surface, c = 1 / R (that is, the paraxial curvature c is the reciprocal of the radius of curvature R in Table 1 above); k is the conic coefficient; Ai is the correction coefficient of the i-th order of the aspherical surface. Tables 2-1 and 2-2 give the higher-order term coefficients A4, A6, A8, A 10 、A 12 、A 14 、A 16 、A 18 、A 20 、A 22 、A 24 、A 26 、A 28 and A 30 .

[0100] Face number A4 A6 A8 A10 A12 A14 A16 S1 1.7036E-02 -7.9893E-04 -1.7070E-05 9.6653E-06 1.0232E-05 1.0583E-05 -1.8003E-06 S2 -7.5624E-03 1.1404E-03 -8.6818E-04 1.3114E-04 -5.6145E-05 1.1404E-05 -1.2535E-06 S3 -8.0948E-02 -5.3573E-04 -1.2553E-03 2.8717E-04 -4.7270E-05 3.4536E-05 -5.3163E-06 S4 -9.5383E-02 -7.5934E-04 1.0031E-03 5.8044E-04 -3.9522E-05 -5.1530E-05 7.4343E-06 S5 3.0259E-04 5.6189E-03 4.3849E-04 -5.6380E-04 -5.1014E-04 5.3406E-05 1.0354E-04 S6 1.9084E-01 3.1415E-02 4.8060E-03 -6.6108E-04 -2.9540E-04 8.0348E-05 1.0581E-04 S7 1.5443E-01 -8.3904E-03 5.7043E-03 -1.4237E-04 -1.3365E-03 2.5513E-05 -3.0098E-04 S8 3.0432E-01 9.3706E-02 3.8810E-03 1.8752E-02 1.1769E-03 4.5795E-03 7.6923E-04 S9 1.9009E-01 3.1193E-02 -2.5651E-02 9.3809E-03 -4.6763E-03 1.5024E-03 -7.4468E-04 S10 -1.5609E-01 3.9233E-02 2.4480E-04 7.5511E-03 -1.6701E-03 1.4648E-03 -8.6050E-04 S11 -1.4624E+00 2.0217E-01 -6.9406E-02 4.1571E-02 -1.6197E-02 7.4521E-03 -5.1279E-03 S12 -1.4884E+00 2.8349E-01 -1.4142E-01 6.2684E-02 -2.3470E-02 1.4676E-02 -9.7191E-03 S13 -2.0779E+00 5.5617E-01 -2.4435E-01 1.1785E-01 -6.3175E-02 4.2571E-02 -2.7554E-02 S14 -1.6410E+00 4.4829E-01 -2.0459E-01 1.1536E-01 -7.3589E-02 5.2481E-02 -3.6614E-02

[0101] Table 2-1

[0102]

[0103]

[0104] Table 2-2

[0105] Table 3 shows the effective focal length f and half of the maximum field of view Semi-FOV of the optical imaging system 1001 in Embodiment 1. The unit of f is millimeter (mm), and the unit of Semi-FOV is degree (°).

[0106] parameter f Semi-FOV Numeric 2.2569 59.6775

[0107] Table 3

[0108] As Figure 2A shown, the optical imaging system 1001 further includes six spacer elements, namely, a first spacer element P1, a second spacer element P2, a third spacer element P3, a fourth spacer element P4, a fifth spacer element P5, and a sixth spacer element P6. The first spacer element P1 is placed on the image side of the first lens and at least partially contacts the image side surface of the first lens; the second spacer element P2 is placed on the image side of the second lens and at least partially contacts the image side surface of the second lens; the third spacer element P3 is placed on the image side of the third lens and at least partially contacts the image side surface of the third lens; the fourth spacer element P4 is placed on the image side of the fourth lens and at least partially contacts the image side surface of the fourth lens; the fifth spacer element P5 is placed on the image side of the fifth lens and at least partially contacts the image side surface of the fifth lens; the sixth spacer element P6 is placed on the image side of the sixth lens and at least partially contacts the image side surface of the sixth lens. Table 4 shows the basic parameter table of the spacer elements of the optical imaging system 1001. The unit of each parameter in Table 4 is millimeter (mm). The above spacer elements can block external redundant light from entering, enable the lens and the lens barrel to be better supported, and enhance the structural stability of the optical imaging system 1001.

[0109] parameter d1s d2s d3s d3m D3m d4s D4s d5s d5m d6m Numeric 1.2021 1.4655 1.7491 1.7491 3.3005 2.3367 6.4884 2.9026 4.6410 4.4490 parameter d0s d0m CP1 EP23 CP3 CP4 EP45 CP5 CP6 / Numeric 1.4108 7.1326 0.0160 0.2455 0.0160 0.0160 0.2757 1.2198 0.0160 /

[0110] Table 4

[0111] Example 2

[0112] Figure 2B shows a schematic structural diagram of the optical imaging system 1002 according to Embodiment 2 of the present application. In this embodiment and the following embodiments, for the sake of brevity, some descriptions similar to those in Embodiment 1 will be omitted.

[0113] As Figure 2BAs shown, the optical imaging system 1002 includes a lens barrel P0, a lens group, and a spacer element group. The lens group of the optical imaging system 1002 is exactly the same as that of the optical imaging system 1001 in Embodiment 1 and will not be described in detail. The optical imaging system 1002 further includes a filter (not shown) for correcting color deviation, and the filter has an object side S15 and an image side S16. The optical imaging system 1002 further includes a stop STO (not shown) disposed on the object side of the first lens. The light from the object sequentially passes through the surfaces S1 to S16 and finally forms an image on an imaging surface (not shown). The basic parameters of the optical imaging system 1002 are shown in Tables 1 to 3 and will not be described in detail.

[0114] As Figure 2B shown, the optical imaging system 1002 further includes six spacer elements, namely, a first spacer element P1, a second spacer element P2, a third spacer element P3, a fourth spacer element P4, a fifth spacer element P5, and a sixth spacer element P6. The first spacer element P1 is disposed on the image side of the first lens and is at least partially in contact with the image side surface of the first lens; the second spacer element P2 is disposed on the image side of the second lens and is at least partially in contact with the image side surface of the second lens; the third spacer element P3 is disposed on the image side of the third lens and is at least partially in contact with the image side surface of the third lens; the fourth spacer element P4 is disposed on the image side of the fourth lens and is at least partially in contact with the image side surface of the fourth lens; the fifth spacer element P5 is disposed on the image side of the fifth lens and is at least partially in contact with the image side surface of the fifth lens; the sixth spacer element P6 is disposed on the image side of the sixth lens and is at least partially in contact with the image side surface of the sixth lens. Table 5 shows the basic parameter table of the spacer elements of the optical imaging system 1002, and the unit of each parameter in Table 5 is millimeter (mm). The above spacer elements can block the entry of excess external light, enable the lenses and the lens barrel to be better supported, and enhance the structural stability of the optical imaging system 1002.

[0115] parameter d1s d2s d3s d3m D3m d4s D4s d5s d5m d6m Numeric 1.1712 1.3947 1.6956 1.6956 3.0867 2.3007 6.2989 3.0523 4.7908 4.4764 parameter d0s d0m CP1 EP23 CP3 CP4 EP45 CP5 CP6 / Numeric 1.7013 7.2740 0.0180 0.2435 0.0180 0.0180 0.2737 1.1671 0.0180 /

[0116] Table 5

[0117] Example 3

[0118] Figure 2C shows a schematic structural diagram of an optical imaging system 1003 according to Embodiment 3 of the present application.

[0119] As Figure 2CAs shown, the optical imaging system 1003 includes a lens barrel P0, a lens group, and a spacer element group. The lens group of the optical imaging system 1003 is exactly the same as that of the optical imaging system 1001 in Embodiment 1, and will not be described in detail. The optical imaging system 1003 further includes a filter (not shown) for correcting color deviation, and the filter has an object side S15 and an image side S16. The optical imaging system 1003 further includes a stop STO (not shown) disposed on the object side of the first lens. Light from the object sequentially passes through each surface S1 to S16 and finally forms an image on an imaging surface (not shown). The basic parameters of the optical imaging system 1003 are shown in Tables 1 to 3 and will not be described in detail.

[0120] As Figure 2C shown, the optical imaging system 1003 further includes six spacer elements, namely a first spacer element P1, a second spacer element P2, a third spacer element P3, a fourth spacer element P4, a fifth spacer element P5, and a sixth spacer element P6. The first spacer element P1 is disposed on the image side of the first lens and at least partially contacts the image side surface of the first lens; the second spacer element P2 is disposed on the image side of the second lens and at least partially contacts the image side surface of the second lens; the third spacer element P3 is disposed on the image side of the third lens and at least partially contacts the image side surface of the third lens; the fourth spacer element P4 is disposed on the image side of the fourth lens and at least partially contacts the image side surface of the fourth lens; the fifth spacer element P5 is disposed on the image side of the fifth lens and at least partially contacts the image side surface of the fifth lens; the sixth spacer element P6 is disposed on the image side of the sixth lens and at least partially contacts the image side surface of the sixth lens. Table 6 shows the basic parameter table of the spacer elements of the optical imaging system 1003, and the unit of each parameter in Table 6 is millimeter (mm). The above spacer elements can block external redundant light from entering, enable the lens and the lens barrel to better bear against each other, and enhance the structural stability of the optical imaging system 1003.

[0121] parameter d1s d2s d3s d3m D3m d4s D4s d5s d5m d6m Numeric 1.2031 1.3622 1.6643 1.6643 2.9064 2.2685 4.8561 4.4156 5.1221 4.5231 parameter d0s d0m CP1 EP23 CP3 CP4 EP45 CP5 CP6 / Numeric 1.5402 7.3191 0.0190 0.2322 0.0190 0.0190 0.9213 0.5433 0.0190 /

[0122] Table 6

[0123] Figure 3A shows the axial chromatic aberration curves of the optical imaging system 1001 in Embodiment 1, the optical imaging system 1002 in Embodiment 2, and the optical imaging system 1003 in Embodiment 3, which represent the deviation of the focusing points of light rays with different wavelengths after passing through the lens. Figure 3B shows the astigmatism curves of the optical imaging system 1001 in Embodiment 1, the optical imaging system 1002 in Embodiment 2, and the optical imaging system 1003 in Embodiment 3, which represent the meridional image plane curvature and the sagittal image plane curvature. According to Figure 3A and Figure 3BIt can be seen that the optical imaging system 1001 of Embodiment 1, the optical imaging system 1002 of Embodiment 2, and the optical imaging system 1003 of Embodiment 3 can all achieve good imaging quality.

[0124] Example 4

[0125] Figure 4A The structural schematic diagram of the optical imaging system 2001 according to Embodiment 4 of the present application is shown. As Figure 4A shown, the optical imaging system 2001 includes a lens barrel, a lens group, and a spacer element group.

[0126] As Figure 4A shown, the lens group sequentially includes, from the object side to the image side: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, and a seventh lens E7. The first lens E1 has an object side surface S1 and an image side surface S2. The second lens E2 has an object side surface S3 and an image side surface S4. The third lens E3 has an object side surface S5 and an image side surface S6. The fourth lens E4 has an object side surface S7 and an image side surface S8. The fifth lens E5 has an object side surface S9 and an image side surface S10. The sixth lens E6 has an object side surface S11 and an image side surface S12. The sixth lens E7 has an object side surface S13 and an image side surface S14.

[0127] The optical imaging system 2001 further includes a filter (not shown) for correcting color deviation, and the filter has an object side surface S15 and an image side surface S16. The optical imaging system 2001 further includes a stop STO (not shown) disposed on the object side of the first lens. The light from the object sequentially passes through the surfaces S1 to S16 and finally forms an image on an imaging surface (not shown).

[0128] Table 7 shows the basic parameter table of the lens group of the optical imaging system 2001 of Embodiment 4, where the units of the radius of curvature, thickness / distance, and effective focal length are all millimeters (mm).

[0129]

[0130] Table 7

[0131] Tables 8-1 and 8-2 show the high-order term coefficients of the aspherical mirror surfaces that can be used in Embodiment 4, where each aspherical surface type can be defined by the formula (1) given in Embodiment 1 above.

[0132]

[0133]

[0134] Table 8-1

[0135] Face number A18 A20 A22 A24 A26 A28 A30 S1 -3.7857E-06 -4.3571E-06 -1.7990E-06 -7.6048E-07 9.6587E-07 1.9730E-07 -8.5134E-08 S2 -1.7957E-07 2.9506E-06 -7.4121E-07 3.9191E-07 -6.4813E-07 3.0465E-07 -4.3012E-08 S3 -2.7898E-07 -1.4570E-06 2.2169E-06 4.9920E-07 2.3478E-07 -4.2979E-07 8.2701E-08 S4 6.7489E-06 1.9659E-06 -6.5049E-07 -1.5051E-07 -1.1330E-07 7.0678E-08 -9.4484E-09 S5 -8.5036E-07 -3.0027E-05 3.2675E-07 4.9844E-06 3.8401E-07 -1.0081E-06 2.1982E-07 S6 3.9709E-05 4.1207E-06 1.4649E-06 -3.1520E-06 2.2689E-06 -2.6809E-06 7.5915E-07 S7 1.9669E-04 6.3249E-05 6.0719E-05 -6.0128E-05 2.9209E-05 -1.8675E-05 -3.2032E-07 S8 1.6940E-05 -5.0592E-05 3.3140E-04 -2.9384E-04 1.3737E-04 -3.2782E-05 2.4381E-06 S9 6.7008E-04 2.6882E-04 1.1853E-04 -2.7604E-04 2.8046E-04 -1.1838E-04 2.8164E-05 S10 3.3374E-04 -2.2401E-04 -9.3826E-05 2.6948E-05 -1.8211E-05 -1.8436E-05 8.9113E-06 S11 2.3898E-03 -1.8991E-03 1.7472E-03 -1.2692E-03 7.1328E-04 -3.5782E-04 2.0422E-05 S12 9.4022E-03 -1.1594E-02 8.3650E-03 -1.2124E-03 -1.8207E-03 9.7716E-04 -1.4458E-04 S13 2.0349E-02 -2.1351E-02 1.8767E-02 -7.7419E-03 -9.9324E-04 1.8173E-03 -3.8037E-04 S14 2.3722E-02 -1.7788E-02 1.6854E-02 -1.4191E-02 8.3135E-03 -2.9346E-03 4.5914E-04

[0136] Table 8-2

[0137] Table 9 shows the effective focal length f and half of the maximum field of view Semi-FOV of the optical imaging system 2001 of Example 4. The unit of f is millimeter (mm), and the unit of Semi-FOV is degree (°).

[0138] parameter f Semi-FOV Numeric 2.3277 61.2666

[0139] Table 9

[0140] As Figure 4A shown, the optical imaging system 2001 further includes six spacer elements, namely a first spacer element P1, a second spacer element P2, a third spacer element P3, a fourth spacer element P4, a fifth spacer element P5, and a sixth spacer element P6. The first spacer element P1 is placed on the image side of the first lens and is at least partially in contact with the image side surface of the first lens; the second spacer element P2 is placed on the image side of the second lens and is at least partially in contact with the image side surface of the second lens; the third spacer element P3 is placed on the image side of the third lens and is at least partially in contact with the image side surface of the third lens; the fourth spacer element P4 is placed on the image side of the fourth lens and is at least partially in contact with the image side surface of the fourth lens; the fifth spacer element P5 is placed on the image side of the fifth lens and is at least partially in contact with the image side surface of the fifth lens; the sixth spacer element P6 is placed on the image side of the sixth lens and is at least partially in contact with the image side surface of the sixth lens. Table 10 shows the basic parameter table of the spacer elements of the optical imaging system 2001. The unit of each parameter in Table 10 is millimeter (mm). The above spacer elements can block the entry of external excess light, make the lens and the lens barrel better supported, and enhance the structural stability of the optical imaging system 2001.

[0141] parameter d1s d2s d3s d3m D3m d4s D4s d5s d5m d6m Numeric 1.1521 1.4577 1.7763 1.7763 3.3197 2.2905 6.2238 2.8664 4.6048 4.2696 parameter d0s d0m CP1 EP23 CP3 CP4 EP45 CP5 CP6 / Numeric 1.2508 6.8680 0.0210 0.2014 0.0210 0.0210 0.2383 1.2198 0.0210 /

[0142] Table 10

[0143] Example 5

[0144] Figure 4B shows a schematic structural diagram of the optical imaging system 2002 according to Embodiment 5 of the present application.

[0145] As Figure 4BAs shown, the optical imaging system 2002 includes a lens barrel P0, a lens group, and a spacer element group. The lens group of the optical imaging system 2002 is exactly the same as that of the optical imaging system 2001 in Embodiment 4, and will not be described in detail. The optical imaging system 2002 further includes a filter (not shown) for correcting color deviation, and the filter has an object side S15 and an image side S16. The optical imaging system 2002 further includes a stop STO (not shown) disposed on the object side of the first lens. The light from the object sequentially passes through the surfaces S1 to S16 and finally forms an image on an imaging surface (not shown). The basic parameters of the optical imaging system 2002 are shown in Tables 7 to 9 and will not be described in detail.

[0146] As Figure 4B shown, the optical imaging system 2002 further includes six spacer elements, namely a first spacer element P1, a second spacer element P2, a third spacer element P3, a fourth spacer element P4, a fifth spacer element P5, and a sixth spacer element P6. The first spacer element P1 is disposed on the image side of the first lens and is at least partially in contact with the image side surface of the first lens; the second spacer element P2 is disposed on the image side of the second lens and is at least partially in contact with the image side surface of the second lens; the third spacer element P3 is disposed on the image side of the third lens and is at least partially in contact with the image side surface of the third lens; the fourth spacer element P4 is disposed on the image side of the fourth lens and is at least partially in contact with the image side surface of the fourth lens; the fifth spacer element P5 is disposed on the image side of the fifth lens and is at least partially in contact with the image side surface of the fifth lens; the sixth spacer element P6 is disposed on the image side of the sixth lens and is at least partially in contact with the image side surface of the sixth lens. Table 11 shows the basic parameter table of the spacer elements of the optical imaging system 2002, and the unit of each parameter in Table 11 is millimeter (mm). The above spacer elements can block external redundant light from entering, enable the lens and the lens barrel to be better supported, and enhance the structural stability of the optical imaging system 2002.

[0147] parameter d1s d2s d3s d3m D3m d4s D4s d5s d5m d6m Numeric 1.1198 1.4163 1.8125 1.8125 2.7791 2.2596 5.8646 2.7979 4.7565 4.3025 parameter d0s d0m CP1 EP23 CP3 CP4 EP45 CP5 CP6 / Numeric 1.5741 6.5087 0.0220 0.2087 0.0220 0.0220 0.2234 1.1665 0.0220 /

[0148] Table 11

[0149] Example 6

[0150] Figure 4C shows a schematic structural diagram of an optical imaging system 2003 according to Embodiment 6 of the present application.

[0151] As Figure 4CAs shown, the optical imaging system 2003 includes a lens barrel P0, a lens group, and a spacer element group. The lens group of the optical imaging system 2003 is exactly the same as that of the optical imaging system 2001 in Embodiment 4, and will not be described in detail. The optical imaging system 2003 further includes a filter (not shown) for correcting color deviation, and the filter has an object side S15 and an image side S16. The optical imaging system 2003 also includes a diaphragm STO (not shown) disposed on the object side of the first lens. The light from the object sequentially passes through the surfaces S1 to S16 and finally forms an image on an imaging surface (not shown). The basic parameters of the optical imaging system 2003 are shown in Tables 7 to 9 and will not be described in detail.

[0152] As Figure 4C shown, the optical imaging system 2003 further includes six spacer elements, namely a first spacer element P1, a second spacer element P2, a third spacer element P3, a fourth spacer element P4, a fifth spacer element P5, and a sixth spacer element P6. The first spacer element P1 is disposed on the image side of the first lens and at least partially contacts the image side surface of the first lens; the second spacer element P2 is disposed on the image side of the second lens and at least partially contacts the image side surface of the second lens; the third spacer element P3 is disposed on the image side of the third lens and at least partially contacts the image side surface of the third lens; the fourth spacer element P4 is disposed on the image side of the fourth lens and at least partially contacts the image side surface of the fourth lens; the fifth spacer element P5 is disposed on the image side of the fifth lens and at least partially contacts the image side surface of the fifth lens; the sixth spacer element P6 is disposed on the image side of the sixth lens and at least partially contacts the image side surface of the sixth lens. Table 12 shows the basic parameter table of the spacer elements of the optical imaging system 2003, and the unit of each parameter in Table 12 is millimeter (mm). The above spacer elements can block external redundant light from entering, enable the lens and the lens barrel to better bear against each other, and enhance the structural stability of the optical imaging system 2003.

[0153] parameter d1s d2s d3s d3m D3m d4s D4s d5s d5m d6m Numeric 1.2210 1.5187 1.8465 1.8465 2.7118 2.3590 4.8379 4.3974 5.0276 4.3618 parameter d0s d0m CP1 EP23 CP3 CP4 EP45 CP5 CP6 / Numeric 1.3847 6.6815 0.0230 0.2335 0.0230 0.0230 0.9117 0.4932 0.0230 /

[0154] Table 12

[0155] Figure 5A shows the axial chromatic aberration curves of the optical imaging system 2001 in Embodiment 4, the optical imaging system 2002 in Embodiment 5, and the optical imaging system 2003 in Embodiment 6, which represent the deviation of the focusing points of light rays of different wavelengths after passing through the lens. Figure 5B shows the astigmatism curves of the optical imaging system 2001 in Embodiment 4, the optical imaging system 2002 in Embodiment 5, and the optical imaging system 2003 in Embodiment 6, which represent the meridional image plane curvature and the sagittal image plane curvature. According to Figure 5A and Figure 5BIt can be seen that the optical imaging system 2001 of Embodiment 4, the optical imaging system 2002 of Embodiment 5, and the optical imaging system 2003 of Embodiment 6 can all achieve good imaging quality.

[0156] Example 7

[0157] Fig. 6A The structural schematic diagram of the optical imaging system 3001 according to Embodiment 7 of the present application is shown. As Fig. 6A shown, the optical imaging system 3001 includes a lens barrel P0, a lens group, and a spacer element group.

[0158] As Fig. 6A shown, the lens group sequentially includes, from the object side to the image side: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, and a seventh lens E7. The first lens E1 has an object side surface S1 and an image side surface S2. The second lens E2 has an object side surface S3 and an image side surface S4. The third lens E3 has an object side surface S5 and an image side surface S6. The fourth lens E4 has an object side surface S7 and an image side surface S8. The fifth lens E5 has an object side surface S9 and an image side surface S10. The sixth lens E6 has an object side surface S11 and an image side surface S12. The sixth lens E7 has an object side surface S13 and an image side surface S14.

[0159] The optical imaging system 3001 further includes a filter (not shown) for correcting color deviation, and the filter has an object side surface S15 and an image side surface S16. The optical imaging system 3001 further includes a diaphragm STO (not shown) disposed on the object side of the first lens. The light from the object sequentially passes through the surfaces S1 to S16 and finally forms an image on an imaging surface (not shown).

[0160] Table 13 shows the basic parameter table of the lens group of the optical imaging system 3001 of Embodiment 7, where the units of the radius of curvature, thickness / distance, and effective focal length are all millimeters (mm).

[0161]

[0162] Table 13

[0163] Tables 14-1 and 14-2 show the high-order term coefficients of the aspherical mirror surfaces that can be used in Embodiment 7, where each aspherical surface type can be defined by the formula (1) given in Embodiment 1 above.

[0164] Face number A4 A6 A8 A10 A12 A14 A16 S1 7.5302E-03 -6.4732E-05 -1.0012E-05 4.5705E-07 2.0986E-06 1.3077E-06 1.2241E-06 S2 -8.5559E-03 3.0929E-03 -5.1262E-04 1.3339E-04 -3.6340E-05 -6.3624E-06 7.4187E-06 S3 -5.4200E-02 4.1463E-03 -6.8831E-04 3.2889E-04 -8.7375E-05 1.3226E-05 -1.4528E-05 S4 -7.2665E-02 -1.8766E-03 5.7279E-04 5.6011E-04 1.0551E-04 -4.4175E-05 -2.4823E-05 S5 -1.5838E-02 -5.8238E-04 5.3798E-04 6.0301E-04 1.1321E-04 -1.0796E-04 -4.1109E-05 S6 7.9976E-02 3.2704E-03 1.2856E-03 -1.0876E-03 1.6337E-04 -1.5103E-04 4.6449E-05 S7 1.8039E-01 -2.8809E-02 9.0179E-03 -1.7186E-03 1.5007E-03 -8.4890E-04 2.6390E-04 S8 1.1374E-01 2.2088E-02 -1.3177E-02 5.8944E-03 -2.1852E-03 7.4351E-04 -5.9911E-04 S9 2.8583E-01 9.4499E-02 -3.0735E-02 1.8189E-02 -7.4288E-03 4.7641E-03 -2.5746E-03 S10 -1.7332E-01 6.1636E-02 -3.7984E-03 8.7874E-03 -3.1586E-03 2.3065E-03 -1.0415E-03 S11 -1.1891E+00 5.9262E-02 -1.1222E-02 1.5770E-03 4.7431E-03 -1.6130E-03 1.2829E-03 S12 -1.6062E+00 2.6527E-01 -1.4848E-01 6.5183E-02 -2.7747E-02 2.1724E-02 -1.4620E-02 S13 -2.4601E+00 5.2771E-01 -2.7153E-01 1.4227E-01 -7.6454E-02 5.4708E-02 -3.5147E-02 S14 -1.8375E+00 2.8375E-01 -1.3947E-01 9.9109E-02 -5.9736E-02 4.7327E-02 -3.4688E-02

[0165] Table 14-1

[0166] Face number A18 A20 A22 A24 A26 A28 A30 S1 -3.6680E-06 -3.9963E-06 -4.5721E-06 -1.6848E-06 1.3887E-06 9.7481E-07 -3.3894E-07 S2 -9.9873E-07 5.1040E-06 -4.7297E-06 2.9342E-06 -1.2463E-06 2.6962E-07 -2.1900E-08 S3 8.2812E-06 1.4423E-06 2.3923E-06 -2.4823E-06 1.7005E-06 -6.6542E-07 8.8179E-08 S4 -6.7749E-06 2.4377E-06 2.0834E-06 2.8478E-06 -4.7061E-07 -7.8836E-07 1.9142E-07 S5 2.3647E-07 1.0457E-05 5.4402E-07 1.0599E-06 -1.0340E-06 2.4716E-07 -2.9761E-08 S6 -7.7893E-05 4.2699E-05 -1.2759E-05 1.5370E-05 -1.0156E-05 4.0167E-06 -6.1301E-07 S7 -3.0536E-04 1.5383E-04 -4.7805E-05 4.0333E-05 -1.9480E-05 4.1090E-06 -3.4115E-07 S8 -7.8243E-05 1.3174E-04 1.3288E-04 -1.7200E-04 5.4556E-05 -1.9203E-06 -6.6401E-07 S9 1.1835E-03 -4.7426E-04 4.5240E-04 -4.6091E-04 2.7035E-04 -8.7034E-05 1.1774E-05 S10 1.2556E-03 -5.1400E-04 2.7370E-04 -1.0963E-04 1.8174E-05 -2.9066E-05 5.7032E-06 S11 -8.5691E-04 -3.9736E-04 3.6731E-04 -1.1600E-04 2.6248E-04 -2.3373E-04 5.7525E-05 S12 1.2640E-02 -1.4540E-02 1.1248E-02 9.5980E-04 -5.3359E-03 1.9987E-03 -1.6053E-04 S13 2.5785E-02 -2.2178E-02 1.5265E-02 -2.1220E-03 -4.0313E-03 1.7147E-03 -9.4904E-05 S14 2.3418E-02 -1.7380E-02 1.1851E-02 -9.0701E-03 5.7858E-03 -2.6199E-03 6.2388E-04

[0167] Table 14-2

[0168] Table 15 shows the effective focal length f and half of the maximum field of view Semi - FOV of the optical imaging system 3001 in Example 7. The unit of f is millimeter (mm), and the unit of Semi - FOV is degree (°).

[0169] parameter f Semi-FOV Numeric 2.0849 61.5899

[0170] Table 15

[0171] As Fig. 6A shown, the optical imaging system 3001 further includes 6 spacer elements, namely the first spacer element P1, the second spacer element P2, the third spacer element P3, the fourth spacer element P4, the fifth spacer element P5 and the sixth spacer element P6. The first spacer element P1 is placed on the image side of the first lens and at least partially contacts the image side surface of the first lens; the second spacer element P2 is placed on the image side of the second lens and at least partially contacts the image side surface of the second lens; the third spacer element P3 is placed on the image side of the third lens and at least partially contacts the image side surface of the third lens; the fourth spacer element P4 is placed on the image side of the fourth lens and at least partially contacts the image side surface of the fourth lens; the fifth spacer element P5 is placed on the image side of the fifth lens and at least partially contacts the image side surface of the fifth lens; the sixth spacer element P6 is placed on the image side of the sixth lens and at least partially contacts the image side surface of the sixth lens. Table 16 shows the basic parameter table of the spacer elements of the optical imaging system 3001. The unit of each parameter in Table 16 is millimeter (mm). The above - mentioned spacer elements can block the entry of external redundant light, enable the lens and the lens barrel to be better supported, and enhance the structural stability of the optical imaging system 3001.

[0172] parameter d1s d2s d3s d3m D3m d4s D4s d5s d5m d6m Numeric 1.1124 1.4703 1.6865 1.6865 3.3877 2.3020 6.2918 2.7765 4.3638 4.4267 parameter d0s d0m CP1 EP23 CP3 CP4 EP45 CP5 CP6 / Numeric 1.1446 7.0903 0.0280 0.2104 0.0280 0.0280 0.2348 1.1208 0.0280 /

[0173] Table 16

[0174] Example 8

[0175] Figure 6B shows the structural schematic diagram of the optical imaging system 3002 according to Embodiment 8 of the present application.

[0176] As Figure 6BAs shown in the figure, the optical imaging system 3002 includes a lens barrel P0, a lens group, and a spacer element group. The lens group of the optical imaging system 3002 is exactly the same as that of the optical imaging system 3001 in Embodiment 7, and will not be described in detail. The optical imaging system 3002 further includes a filter (not shown) for correcting color deviation, and the filter has an object side S15 and an image side S16. The optical imaging system 3002 also includes a diaphragm STO (not shown) disposed on the object side of the first lens. The light from the object sequentially passes through the surfaces S1 to S16 and finally forms an image on an imaging surface (not shown). The basic parameters of the optical imaging system 3002 are shown in Tables 13 to 15 in detail and will not be described again.

[0177] As Figure 6B shown, the optical imaging system 3002 further includes six spacer elements, namely a first spacer element P1, a second spacer element P2, a third spacer element P3, a fourth spacer element P4, a fifth spacer element P5, and a sixth spacer element P6. The first spacer element P1 is disposed on the image side of the first lens and is at least partially in contact with the image side surface of the first lens; the second spacer element P2 is disposed on the image side of the second lens and is at least partially in contact with the image side surface of the second lens; the third spacer element P3 is disposed on the image side of the third lens and is at least partially in contact with the image side surface of the third lens; the fourth spacer element P4 is disposed on the image side of the fourth lens and is at least partially in contact with the image side surface of the fourth lens; the fifth spacer element P5 is disposed on the image side of the fifth lens and is at least partially in contact with the image side surface of the fifth lens; the sixth spacer element P6 is disposed on the image side of the sixth lens and is at least partially in contact with the image side surface of the sixth lens. Table 17 shows the basic parameter table of the spacer elements of the optical imaging system 3002, and the unit of each parameter in Table 17 is millimeter (mm). The above spacer elements can block the entry of excess external light, enable the lens and the lens barrel to be better supported, and enhance the structural stability of the optical imaging system 3002.

[0178] parameter d1s d2s d3s d3m D3m d4s D4s d5s d5m d6m Numeric 1.0655 1.4125 1.6418 1.6418 2.5808 2.3551 5.9920 2.9279 4.4292 4.4582 parameter d0s d0m CP1 EP23 CP3 CP4 EP45 CP5 CP6 / Numeric 1.3299 6.7905 0.0290 0.2036 0.0290 0.0290 0.2510 1.0643 0.0290 /

[0179] Table 17

[0180] Example 9

[0181] Figure 6C shows a schematic structural diagram of an optical imaging system 3003 according to Embodiment 9 of the present application.

[0182] As Figure 6CAs shown, the optical imaging system 3003 includes a lens barrel P0, a lens group, and a spacer element group. The lens group of the optical imaging system 3003 is exactly the same as that of the optical imaging system 3001 in Embodiment 7, and will not be described in detail. The optical imaging system 3003 further includes a filter (not shown) for correcting color deviation, and the filter has an object side S15 and an image side S16. The optical imaging system 3003 further includes a stop STO (not shown) disposed on the object side of the first lens. Light from the object sequentially passes through each surface S1 to S16 and finally forms an image on an imaging surface (not shown). The basic parameters of the optical imaging system 3003 are shown in Tables 13 to 15 and will not be described in detail.

[0183] As Figure 6C shown, the optical imaging system 3003 further includes six spacer elements, namely a first spacer element P1, a second spacer element P2, a third spacer element P3, a fourth spacer element P4, a fifth spacer element P5, and a sixth spacer element P6. The first spacer element P1 is disposed on the image side of the first lens and at least partially contacts the image side surface of the first lens; the second spacer element P2 is disposed on the image side of the second lens and at least partially contacts the image side surface of the second lens; the third spacer element P3 is disposed on the image side of the third lens and at least partially contacts the image side surface of the third lens; the fourth spacer element P4 is disposed on the image side of the fourth lens and at least partially contacts the image side surface of the fourth lens; the fifth spacer element P5 is disposed on the image side of the fifth lens and at least partially contacts the image side surface of the fifth lens; the sixth spacer element P6 is disposed on the image side of the sixth lens and at least partially contacts the image side surface of the sixth lens. Table 18 shows the basic parameter table of the spacer elements of the optical imaging system 3003, and the unit of each parameter in Table 18 is millimeter (mm). The above spacer elements can block external redundant light from entering, enable the lens and the lens barrel to better bear against each other, and enhance the structural stability of the optical imaging system 3003.

[0184] parameter d1s d2s d3s d3m D3m d4s D4s d5s d5m d6m Numeric 1.1722 1.5377 1.7458 1.7458 2.4955 2.4081 4.8075 4.6859 5.1713 4.4768 parameter d0s d0m CP1 EP23 CP3 CP4 EP45 CP5 CP6 / Numeric 1.3730 6.9400 0.0300 0.1882 0.0300 0.0300 0.8939 0.4167 0.0300 /

[0185] Table 18

[0186] Fig. 7A shows the axial chromatic aberration curves of the optical imaging system 3001 in Embodiment 7, the optical imaging system 3002 in Embodiment 8, and the optical imaging system 3003 in Embodiment 9, which represent the deviation of the convergence points of light rays with different wavelengths after passing through the lens. Figure 7B shows the astigmatism curves of the optical imaging system 3001 in Embodiment 7, the optical imaging system 3002 in Embodiment 8, and the optical imaging system 3003 in Embodiment 9, which represent the meridional image plane curvature and the sagittal image plane curvature. According to Fig. 7A and Figure 7BIt can be seen that the optical imaging system 3001 of Embodiment 7, the optical imaging system 3002 of Embodiment 8, and the optical imaging system 3003 of Embodiment 9 can all achieve good imaging quality.

[0187] In summary, the optical imaging systems of Embodiments 1 to 9 satisfy the relationships shown in Table 19.

[0188] Conditional / Example 1 2 3 4 5 6 7 8 9 (EP45+CP5) / CT6 1.4272 1.3750 1.3976 1.1925 1.1367 1.1491 1.6061 1.5586 1.5529 d0m / d0s 5.0557 4.2755 4.7522 5.4910 4.1349 4.8252 6.1948 5.1058 5.0546 T67 / (T56+CP6) 8.1874 7.8455 7.6851 5.0511 4.9538 4.8601 1.5778 1.5513 1.5256 R14 / R13 1.1629 1.1629 1.1629 1.1230 1.1230 1.1230 1.5456 1.5456 1.5456 f7 / d6m 3.6509 3.6285 3.5910 3.5992 3.5716 3.5231 0.9997 0.9926 0.9885 CT6 / EP45 3.8004 3.8281 1.1375 5.1319 5.4743 1.3411 3.5951 3.3619 0.9441 CP5 / CT5 2.0823 1.9923 0.9274 2.1442 2.0504 0.8670 1.8135 1.7221 0.6743 f6 / (EP45 + CP5) 2.7959 2.9020 2.8551 5.2903 5.5500 5.4903 3.7152 3.8287 3.8426 d5s / R10 - d5m / R11 -5.8927 -6.1264 -7.4432 -4.9618 -4.9859 -6.5017 -5.1557 -5.3048 -7.0226 SAG52 / (CP4 + CT5) -1.2628 -1.2586 -1.2565 -1.3538 -1.3515 -1.3492 -1.2693 -1.2673 -1.2654 (D4s - d4s) / (D3m - d3m) 2.6760 2.8741 2.0834 2.5485 3.7296 2.8647 2.3453 3.8733 3.2007 CT3 / EP23 2.1260 2.1435 2.2474 2.6060 2.5149 2.2481 2.4118 2.4928 2.6969 R4 / R3 1.1190 1.1190 1.1190 1.1047 1.1047 1.1047 1.2327 1.2327 1.2327 (V3 - V2) / f2 × d2s 2.6640 2.5352 2.4761 2.0162 1.9591 2.1006 4.0520 3.8928 4.2378 CT1 / (T12 + CP1) 4.7322 4.5350 4.4424 4.4867 4.4004 4.3174 3.4487 3.3902 3.3337 T34 / (T23 + CP3) 4.3577 4.2560 4.2069 3.8646 3.8221 3.7806 2.9190 2.8902 2.8619 DT72 / DT11 5.1442 5.1442 5.1442 4.9158 4.9158 4.9158 5.4231 5.4231 5.4231 d6m / d1s 3.7011 3.8220 3.7596 3.7060 3.8421 3.5724 3.9796 4.1841 3.8190 d2s / d1s 1.2192 1.1908 1.1323 1.2653 1.2648 1.2439 1.3218 1.3257 1.3118 d3s / d2s 1.1934 1.2158 1.2218 1.2186 1.2797 1.2158 1.1470 1.1623 1.1353 T23 / T12 2.2561 2.2561 2.2561 2.3010 2.3010 2.3010 2.4066 2.4066 2.4066

[0189] Table 19

[0190] The present application also provides an imaging device, and its electronic photosensitive element can be a charge-coupled device (CCD) or a complementary metal-oxide-semiconductor element (CMOS). The imaging device can be an independent imaging device such as a digital camera, or an imaging module integrated on a mobile electronic device such as a mobile phone. The imaging device is equipped with the optical imaging system described above.

[0191] The above description is only a preferred embodiment of the present application and an explanation of the applied technical principles. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solutions formed by the specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the technical solutions formed by mutually replacing the above features with the (but not limited to) technical features having similar functions disclosed in the present application.

Claims

1. An optical imaging system, characterized in that: Comprising: A lens group, which sequentially includes, from the object side to the image side along the optical axis: a first lens with a negative focal power, a second lens with a positive focal power, a third lens with a positive focal power, a fourth lens with a negative focal power, a fifth lens with a focal power, a sixth lens with a positive focal power, and a seventh lens with a positive focal power; An interval element group, including: a fourth interval element and a fifth interval element, wherein the fourth interval element is disposed on the image side of the fourth lens and at least partially contacts the image side surface of the fourth lens, and the fifth interval element is disposed on the image side of the fifth lens and at least partially contacts the image side surface of the fifth lens; and A lens barrel for accommodating the lens group and the interval element group; Wherein, The number of lenses with a focal power in the optical imaging system is seven; Half of the maximum field of view angle Semi-FOV of the optical imaging system satisfies: 59.6° < Semi-FOV < 61.6°; The inner diameter d0m of the image-side end surface of the lens barrel and the inner diameter d0s of the object-side end surface of the lens barrel satisfy: 4.1 < d0m / d0s < 6.2; The on-axis distance EP45 from the image side surface of the fourth interval element to the object side surface of the fifth interval element, the thickness CP5 of the fifth interval element along the optical axis direction, and the central thickness CT6 of the sixth lens on the optical axis satisfy: 1.1 < (EP45 + CP5) / CT6 < 1.

62.

2. The optical imaging system according to claim 1, wherein The interval element group further includes: a sixth interval element disposed on the image side of the sixth lens and at least partially contacting the image side surface of the sixth lens; The optical imaging system satisfies: 1.5 < T67 / (T56 + CP6) < 8.2, where T67 is the air interval between the sixth lens and the seventh lens on the optical axis, T56 is the air interval between the fifth lens and the sixth lens on the optical axis, and CP6 is the thickness of the sixth interval element along the optical axis direction.

3. The optical imaging system according to claim 1, wherein The interval element group further includes: a sixth interval element disposed on the image side of the sixth lens and at least partially contacting the image side surface of the sixth lens; The optical imaging system satisfies: 1.1 < R14 / R13 < 1.6 and 0.9885 ≤ f7 / d6m < 3.7, where R13 is the curvature radius of the object side surface of the seventh lens, R14 is the curvature radius of the image side surface of the seventh lens, f7 is the effective focal length of the seventh lens, and d6m is the inner diameter of the image side surface of the sixth interval element.

4. The optical imaging system according to claim 1, wherein The optical imaging system satisfies: 0.9 < CT6 / EP45 < 5.5, where CT6 is the central thickness of the sixth lens on the optical axis, and EP45 is the on-axis distance from the image side surface of the fourth interval element to the object side surface of the fifth interval element.

5. The optical imaging system according to claim 1, wherein The optical imaging system satisfies: 0.6743 ≤ CP5 / CT5 ≤ 2.1442, where CP5 is the thickness of the fifth spacer element along the optical axis direction, and CT5 is the central thickness of the fifth lens on the optical axis.

6. The optical imaging system according to claim 1, wherein The optical imaging system satisfies: 2.7959 ≤ f6 / (EP45 + CP5) < 5.6, where f6 is the effective focal length of the sixth lens, EP45 is the on-axis distance from the image side of the fourth spacer element to the object side of the fifth spacer element, and CP5 is the thickness of the fifth spacer element along the optical axis direction.

7. The optical imaging system according to claim 1, wherein The optical imaging system satisfies: -7.4432 ≤ d5s / R10 - d5m / R11 ≤ -4.9618, where d5s is the inner diameter of the object side of the fifth spacer element, R10 is the radius of curvature of the image side of the fifth lens, d5m is the inner diameter of the image side of the fifth spacer element, and R11 is the radius of curvature of the object side of the sixth lens.

8. The optical imaging system according to claim 1, wherein The optical imaging system satisfies: -1.4 < SAG52 / (CP4 + CT5) < -1.2, where SAG52 is the on-axis distance between the intersection of the image side of the fifth lens and the optical axis and the vertex of the effective radius of the image side of the fifth lens, CP4 is the thickness of the fourth spacer element along the optical axis direction, and CT5 is the central thickness of the fifth lens on the optical axis.

9. The optical imaging system according to any one of claims 1-8, wherein The spacer element group further includes: a third spacer element disposed on the image side of the third lens and at least partially in contact with the image side of the third lens; The optical imaging system satisfies: 2.0834 ≤ (D4s - d4s) / (D3m - d3m) < 3.9, where D4s is the outer diameter of the object side of the fourth spacer element, d4s is the inner diameter of the object side of the fourth spacer element, D3m is the outer diameter of the image side of the third spacer element, and d3m is the inner diameter of the image side of the third spacer element.

10. The optical imaging system according to any one of claims 1-8, wherein The spacer element group further includes: a second spacer element and a third spacer element, wherein the second spacer element is disposed on the image side of the second lens and at least partially in contact with the image side of the second lens, and the third spacer element is disposed on the image side of the third lens and at least partially in contact with the image side of the third lens; The optical imaging system satisfies: 2.1 < CT3 / EP23 < 2.7, where CT3 is the central thickness of the third lens on the optical axis, and EP23 is the on-axis distance from the image side of the second spacer element to the object side of the third spacer element.

11. The optical imaging system according to any one of claims 1-8, wherein The spacer element group further includes: a second spacer element disposed on the image side of the second lens and at least partially in contact with the image side surface of the second lens; The optical imaging system satisfies: 1.1 < R4 / R3 ≤ 1.2327 and 1.9 < (V3 - V2) / f2 × d2s ≤ 4.2378, where R3 is the radius of curvature of the object side surface of the second lens, R4 is the radius of curvature of the image side surface of the second lens, V2 is the Abbe number of the second lens, V3 is the Abbe number of the third lens, f2 is the effective focal length of the second lens, and d2s is the inner diameter of the object side surface of the second spacer element.

12. The optical imaging system according to any one of claims 1-8, wherein The spacer element group further includes: a first spacer element disposed on the image side of the first lens and at least partially in contact with the image side surface of the first lens; The optical imaging system satisfies: 3.3 < CT1 / (T12 + CP1) ≤ 4.7322, where CT1 is the central thickness of the first lens on the optical axis, T12 is the air gap between the first lens and the second lens on the optical axis, and CP1 is the thickness of the first spacer element along the optical axis direction.

13. The optical imaging system according to any one of claims 1-8, wherein The spacer element group further includes: a third spacer element disposed on the image side of the third lens and at least partially in contact with the image side surface of the third lens; The optical imaging system satisfies: 2.8619 ≤ T34 / (T23 + CP3) < 4.4, where T34 is the air gap between the third lens and the fourth lens on the optical axis, T23 is the air gap between the second lens and the third lens on the optical axis, and CP3 is the thickness of the third spacer element along the optical axis direction.

14. The optical imaging system according to any one of claims 1, 4-8, wherein The spacer element group further includes: a first spacer element and a sixth spacer element, wherein the first spacer element is disposed on the image side of the first lens and at least partially in contact with the image side surface of the first lens, and the sixth spacer element is disposed on the image side of the sixth lens and at least partially in contact with the image side surface of the sixth lens; The optical imaging system satisfies: 4.9 < DT72 / DT11 ≤ 5.4231 and 3.5724 ≤ d6m / d1s < 4.2, where DT11 is the diameter of the light-transmitting portion of the object side surface of the first lens, DT72 is the diameter of the light-transmitting portion of the image side surface of the seventh lens, d6m is the inner diameter of the image side surface of the sixth spacer element, and d1s is the inner diameter of the object side surface of the first spacer element.

15. The optical imaging system according to any one of claims 1-8, wherein The spacer element group further includes: a first spacer element, a second spacer element, and a third spacer element. Among them, the first spacer element is placed on the image side of the first lens and at least partially contacts the image side surface of the first lens; the second spacer element is placed on the image side of the second lens and at least partially contacts the image side surface of the second lens; the third spacer element is placed on the image side of the third lens and at least partially contacts the image side surface of the third lens. The optical imaging system satisfies: 1.1 < d2s / d1s ≤ 1.3257, 1.1 < d3s / d2s < 1.3, and 2.2 < T23 / T12 ≤ 2.4066, where d1s is the inner diameter of the object side surface of the first spacer element, d2s is the inner diameter of the object side surface of the second spacer element, d3s is the inner diameter of the object side surface of the third spacer element, T23 is the air gap between the second lens and the third lens on the optical axis, and T12 is the air gap between the first lens and the second lens on the optical axis.

16. The optical imaging system according to any one of claims 1-8, characterized in that In the spacer element group, the inner diameter of the object side surface and the inner diameter of the image side surface of the fifth spacer element are the largest.

17. The optical imaging system according to claim 1, characterized in that The object side surface of the first lens is concave. The object side surface of the second lens is convex, and the image side surface is concave. The image side surface of the third lens is convex. The object side surface of the fourth lens is concave, and the image side surface is convex. The object side surface of the fifth lens is concave, and the image side surface is convex. The object side surface of the sixth lens is convex, and the image side surface is concave. The object side surface of the seventh lens is convex, and the image side surface is concave.

Images