Imaging system

Abstract

The application discloses an imaging system, comprising a lens barrel and first to eighth lenses arranged in sequence from an object side to an image side along an optical axis and accommodated in the lens barrel, wherein the product of the curvature radius values of the object side surface and the image side surface of a lens satisfying an Abbe number greater than 30 among the first to eighth lenses is greater than zero; the imaging system further comprises third, fourth, fifth, sixth and seventh abutting members respectively located on the image side of the third, fourth, fifth, sixth and seventh lenses and at least partially in contact with the image side surface of the third, fourth, fifth, sixth and seventh lenses. The effective focal length f, the entrance pupil diameter EPD, the Abbe numbers V6, V7 and V8 of the sixth, seventh and eighth lenses, the outer diameter D0s of the object side end surface of the lens barrel, the outer diameter D0m of the image side end surface of the lens barrel and the effective focal length f5 of the fifth lens of the imaging system respectively satisfy: 1.2 < f / EPD < 1.8, 3.7 < (V7+V8) / V6 < 5.5 and -6mm < (D0s+D0m)×EPD / f5 < -1mm.

Description

Technical Field

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

[0002] As photography technology is used more and more frequently in various scenarios, the requirements for optical lenses are also gradually increasing. The number of lens elements has increased from three to six or more, while higher demands are placed on lens structural stability and optical imaging quality. However, the requirements for high pixels and large image planes have led to an increase in the number of lens elements, the number of supporting and mounting mechanisms and components, and the number of components that can generate stray light. For example, an unreasonable design of the front and rear dimensions of the lens barrel and its matching with the lens elements can easily produce stray light, which contradicts the requirement for high image cleanliness. Moreover, the lens shape is getting larger and heavier, which contradicts the requirements for lightweight and miniaturized terminal devices.

[0003] Therefore, it is hoped that by optimizing and controlling the parameters and structure of the internal optical system, as well as by optimizing and controlling the dimensions of, for example, the object-side and image-side ends of the lens barrel, it is possible to reasonably control the relative thickness of the lens while satisfying the requirements of a large lens aperture, ensuring lens strength and assembly stability, thereby achieving both miniaturization and stable image quality; and it is also hoped that while reducing stray light, the lens can have a large aperture and further ensure lens reliability. Summary of the Invention

[0004] The present application provides an imaging system, which may include a lens barrel and a lens group and a plurality of abutting members accommodated in the lens barrel. Among them, the lens group includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens and an eighth lens arranged in sequence from the object side to the image side along the optical axis; for the lenses in the first lens to the eighth lens that satisfy the Abbe number being greater than 30, the product of the curvature radius value of the object side surface and the curvature radius value of the image side surface thereof is greater than zero; the plurality of abutting members include: a third abutting member, located on the image side of the third lens and at least partially contacting the image side surface of the third lens; a fourth abutting member, located on the image side of the fourth lens and at least partially contacting the image side surface of the fourth lens; a fifth abutting member, located on the image side of the fifth lens and at least partially contacting the image side surface of the fifth lens; a sixth abutting member, located on the image side of the sixth lens and at least partially contacting the image side surface of the sixth lens; a seventh abutting member, located on the image side of the seventh lens and at least partially contacting the image side surface of the seventh lens; the imaging system satisfies: 1.2 < f / EPD < 1.8; 3.7 < (V7 + V8) / V6 < 5.5; and -6 mm < (D0s + D0m) × EPD / f5 < -1 mm, where f is the effective focal length of the imaging system, EPD is the entrance pupil diameter of the imaging system, V7 is the Abbe number of the seventh lens, V8 is the Abbe number of the eighth lens, V6 is the Abbe number of the sixth lens, D0s is the outer diameter of the object side end face of the lens barrel, D0m is the outer diameter of the image side end face of the lens barrel, and f5 is the effective focal length of the fifth lens.

[0005] In one embodiment, the outer diameter D3m of the image side surface of the third abutting member, the outer diameter D6s of the object side surface of the sixth abutting member, the effective focal length f3 of the third lens and the effective focal length f6 of the sixth lens satisfy: -0.1 < (D3m + D6s) / (f3 - f6) < 1.5.

[0006] In one embodiment, half of the maximum field angle Semi - FOV of the imaging system, the effective focal length f of the imaging system and the maximum height L of the lens barrel satisfy: 0.5 < tan(Semi - FOV) × f / L < 0.9.

[0007] In one embodiment, the distance TD on the optical axis from the object side surface of the first lens to the image side surface of the eighth lens, 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: 0.5 < TD / (d0m - d0s) < 2.

[0008] In one embodiment, the inner diameter d7s of the object side of the seventh support member, the outer diameter D7m of the image side of the seventh support member, the effective focal length f7 of the seventh lens, and the effective focal length f8 of the eighth lens satisfy: 0<(d7s+D7m) / |f7+f8|<8.

[0009] In one embodiment, the inner diameter d7s of the object side of the seventh support member, the inner diameter d7m of the image side of the seventh support member, the radius of curvature R14 of the image side of the seventh lens, the radius of curvature R15 of the object side of the eighth lens, the radius of curvature R13 of the object side of the seventh lens, the radius of curvature R16 of the image side of the eighth lens, the thickness CP7 of the seventh support member, the air gap T78 between the seventh and eighth lenses on the optical axis, and the center thickness CT8 of the eighth lens on the optical axis satisfy: -7.5 < (d7s + d7m) / (R14 + R15) < -1.5 and 8 < (R13 - R16) / (CP7 + T78 + CT8) < 19.

[0010] In one embodiment, the air gap T45 between the fourth lens and the fifth lens on the optical axis, the air gap T56 between the fifth lens and the sixth lens on the optical axis, the thickness CP4 of the fourth support member and the thickness CP6 of the sixth support member satisfy: 0 < (T45 + T56) / (CP4 + CP6) < 22.

[0011] In one embodiment, the inner diameter d5s of the object side of the fifth support member, the outer diameter D5m of the image side of the fifth support member, the radius of curvature R8 of the image side of the fourth lens, and the radius of curvature R9 of the object side of the fifth lens satisfy: 0<(d5s+D5m) / |R8-R9|<18.

[0012] In one embodiment, the inner diameter d3m of the image side of the third support member, the outer diameter D3s of the object side of the third support member, the effective focal length f3 of the third lens, and the thickness CP3 of the third support member satisfy: -16<(d3m×D3s) / (f3×CP3)<0.

[0013] In one embodiment, the distance EP45 between the image side of the fourth support member and the object side of the fifth support member on the optical axis, the distance EP56 between the image side of the fifth support member and the object side of the sixth support member on the optical axis, and the radius of curvature R8 of the image side of the fourth lens and the radius of curvature R9 of the object side of the fifth lens satisfy: -1<(EP45-EP56) / (R8-R9)<1.

[0014] In one embodiment, the plurality of supporting members further includes: a second supporting member, located on the image side of the second lens, and at least partially contacting the image side surface of the second lens; the effective focal length f2 of the second lens, the Abbe number V2 of the second lens, the Abbe number V3 of the third lens, and the inner diameter d2s of the object side surface of the second supporting member satisfy: -12 < f2×(V2 - V3) / d2s < -6.

[0015] In one embodiment, the plurality of supporting members further includes: a first supporting member, located on the image side of the first lens, and at least partially contacting the image side surface of the first lens; the distance TD on the optical axis from the object side surface of the first lens to the image side surface of the eighth lens, the distance EP01 on the optical axis from the object side end surface of the lens barrel to the object side surface of the first supporting member, and the maximum height L of the lens barrel satisfy: 4 < TD / EP01 + TD / L < 6.

[0016] In one embodiment, the plurality of supporting members further includes: a first supporting member, located on the image side of the first lens, and at least partially contacting the image side surface of the first lens; and a second supporting member, located on the image side of the second lens, and at least partially contacting the image side surface of the second lens; the inner diameter d1s of the object side surface of the first supporting member and the inner diameter djs of the object side surface of the j-th supporting member satisfy: 1 < d1s / djs < 3, where j = 2, 3, or 4.

[0017] In one embodiment, the effective focal length f6 of the sixth lens, the distance EP67 on the optical axis from the image side surface of the sixth supporting member to the object side surface of the seventh supporting member, the outer diameter D6m of the image side surface of the sixth supporting member, and the distance SAG62 on the optical axis from the intersection point of the image side surface of the sixth lens and the optical axis to the maximum effective semi-aperture on the image side surface of the sixth lens satisfy: 2 < f6×EP67 / D6m / SAG62 < 39.

[0018] In one embodiment, the distance SAG51 on the optical axis from the intersection point of the object side surface of the fifth lens and the optical axis to the maximum effective semi-aperture on the object side surface of the fifth lens, the distance SAG52 on the optical axis from the intersection point of the image side surface of the fifth lens and the optical axis to the maximum effective semi-aperture on the image side surface of the fifth lens, and the distance EP56 on the optical axis from the image side surface of the fifth supporting member to the object side surface of the sixth supporting member satisfy: -5 < (SAG51 + SAG52) / EP56 < -1.

[0019] In one embodiment, the radius of curvature R of the image side surface of the i-th lens in the lens group

[0018] , , , n ,

[0017] , n-1 ,

[0019] and the radius of curvature R of the object side surface of the i-th lens n-1, the effective focal length fi of the i-th lens and the inner diameter dis of the object side surface of the i-th supporting member satisfy: When R n / R n-1 < 0, 0 < fi / dis < 6, where i = 1, 2, 3, 4, 5, 6 or 7, and i = n / 2.

[0020] In one embodiment, the first lens has a positive optical power, its object side surface is convex, and its image side surface is concave; the second lens has a negative optical power, its object side surface is convex, and its image side surface is concave; the third lens has a negative optical power, its object side surface is convex, and its image side surface is concave; the fourth lens has a positive optical power, its object side surface is convex, and its image side surface is convex; the fifth lens has a negative optical power, its object side surface is concave, and its image side surface is convex; the sixth lens has a negative optical power, its object side surface is concave, and its image side surface is convex; the seventh lens has a positive optical power, its object side surface is convex, and its image side surface is convex; and the eighth lens has a negative optical power, its object side surface is convex, and its image side surface is concave.

[0021] The imaging system according to an embodiment of the present application includes a lens barrel and an eight-piece lens group and a plurality of supporting members accommodated in the lens barrel. Among them, the first lens to the eighth lens are arranged in sequence from the object side to the image side along the optical axis. Third supporting members, fourth supporting members, fifth supporting members, sixth supporting members, and seventh supporting members that are at least partially in contact with the image side surfaces of the third lens, the fourth lens, the fifth lens, the sixth lens, and the seventh lens are respectively provided on the image sides of the third lens, the fourth lens, the fifth lens, the sixth lens, and the seventh lens; for the lens in the lens group whose Abbe number is greater than 30, the product of the curvature radius values of its object side surface and image side surface is greater than zero. Through this setting of the lens, and controlling that the effective focal length f of the imaging system and the entrance pupil diameter EPD satisfy the conditional formula 1.2 < f / EPD < 1.8, and controlling the Abbe numbers V6, V7, and V8 of the sixth lens, the seventh lens, and the eighth lens to satisfy the conditional formula 3.7 < (V7 + V8) / V6 < 5.5, the relative thickness of the lens can be controlled, while ensuring the overall strength of the lens when meeting the large aperture of the lens, preventing the risk of cracking during the lens assembly process and affecting the overall imaging of the lens; on the premise that the imaging system satisfies the above conditional formulas 1.2 < f / EPD < 1.8 and 3.7 < (V7 + V8) / V6 < 5.5, at the same time controlling the outer diameter D0s of the object side end surface of the lens barrel, the outer diameter D0m of the image side end surface of the lens barrel, the entrance pupil diameter EPD of the lens, and the effective focal length f5 of the fifth lens to satisfy the conditional formula -6 mm < (D0s + D0m) × EPD / f5 < -1 mm can keep the overall lens having a large aperture, thereby improving the overall design of the lens, ensuring sufficient supporting space for each lens, and having a great promoting effect on the reliability performance of the lens assembly. Description of the Drawings

[0022] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments, taken in conjunction with the accompanying drawings. In the drawings:

[0023] Figure 1 A schematic diagram showing the structure and related parameters of an imaging system according to an exemplary embodiment of this application is provided;

[0024] Figure 2 A schematic diagram of the imaging system according to Embodiment 1 of this application is shown;

[0025] Figure 3 A schematic diagram of the imaging system according to Embodiment 2 of this application is shown;

[0026] Figure 4 A schematic diagram of the imaging system according to Embodiment 3 of this application is shown;

[0027] Figures 5 to 8 The on-axis chromatic aberration curves, astigmatism curves, distortion curves, and magnification chromatic aberration curves of the imaging systems according to Embodiments 1, 2, and 3 of this application are shown.

[0028] Figure 9 A schematic diagram of the imaging system according to Embodiment 4 of this application is shown;

[0029] Figure 10 A schematic diagram of the imaging system according to Embodiment 5 of this application is shown;

[0030] Figure 11 A schematic diagram of the imaging system according to Embodiment 6 of this application is shown;

[0031] Figures 12 to 15 The on-axis chromatic aberration curves, astigmatism curves, distortion curves, and magnification chromatic aberration curves of the imaging systems according to Embodiments 4, 5, and 6 of this application are shown.

[0032] Figure 16 A schematic diagram of the imaging system according to Embodiment 7 of this application is shown;

[0033] Figure 17 A schematic diagram of the imaging system according to Embodiment 8 of this application is shown;

[0034] Figure 18 A schematic diagram of the imaging system according to Embodiment 9 of this application is shown;

[0035] Figures 19 to 22 The on-axis chromatic aberration curves, astigmatism curves, distortion curves, and magnification chromatic aberration curves of the imaging systems according to Embodiments 7, 8, and 9 of this application are shown; and

[0036] Figure 23 and Figure 24 The tables in the table show the changes in the relevant parameter values ​​of the lens MTF of the imaging system according to the exemplary embodiments of this application before and after the first and second rounds of micro-drop tests. Detailed Implementation

[0037] To better understand this application, various aspects of this application will be described in more detail with reference to the accompanying drawings. It should be understood that these detailed descriptions are merely illustrative of exemplary embodiments of this application and are not intended to limit the scope of this application in any way. Throughout the specification, the same reference numerals refer to the same elements. The expression "and / or" includes any and all combinations of one or more of the associated listed items.

[0038] It should be noted that in this specification, the terms "first," "second," "third," etc., are used only to distinguish one feature from another and do not imply any limitation on the features. Therefore, without departing from the teachings of this application, the first lens discussed below may also be referred to as the second lens or the third lens.

[0039] In the accompanying drawings, the thickness, size, and shape of the lenses have been slightly exaggerated for ease of illustration. Specifically, the shapes of the spherical or aspherical surfaces shown in the drawings are illustrated by way of example. That is, the shapes of the spherical or aspherical surfaces are not limited to those shown in the drawings. The drawings are for illustrative purposes only and are not strictly to scale.

[0040] In this paper, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the location of the convexity is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the location of the concaveness is not defined, it means that the lens surface is concave at least in the paraxial region. The surface shape in the paraxial region can be determined according to methods commonly used in the art, such as using the sign of the R value (R refers to the radius of curvature of the paraxial region) to determine concavity or convexity. In this paper, the surface of each lens closest to the subject is called the object-side surface of the lens, and the surface of each lens closest to the imaging plane is called the image-side surface of the lens. For the object-side surface, when the R value is positive, it is determined to be convex, and when the R value is negative, it is determined to be concave; for the image-side surface, when the R value is positive, it is determined to be concave, and when the R value is negative, it is determined to be convex.

[0041] It should also be understood that the terms "comprising," "including," "having," "containing," and / or "comprising," when used in this specification, indicate the presence of the stated features, elements, and / or components, but do not exclude the presence or addition of one or more other features, elements, components, and / or combinations thereof. Furthermore, when expressions such as "at least one of..." appear after a list of listed features, they modify the entire list of features, not individual elements in the list. Additionally, when describing embodiments of this application, the word "may" is used to mean "one or more embodiments of this application." And the term "exemplary" is intended to refer to an example or illustration.

[0042] Unless otherwise specified, all terms used herein (including technical and scientific terms) shall have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. It should also be understood that terms (e.g., those defined in common dictionaries) shall be interpreted as having a meaning consistent with their meaning in the context of the relevant art and shall not be interpreted in an idealized or overly formalized sense, unless expressly so specified herein.

[0043] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other. The following embodiments merely illustrate several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this application. It should be pointed out that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0044] The features, principles and other aspects of this application are described in detail below.

[0045] An imaging system according to an exemplary embodiment of this application may include a lens barrel and a lens group and a plurality of support members housed in the lens barrel. The lens group may be an eight-lens group, including a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens arranged sequentially along the optical axis from the object side to the image side.

[0046] In an exemplary embodiment, for a lens in a lens group that satisfies an Abbe number greater than 30, the product of the radius of curvature of its object side and the radius of curvature of its image side is greater than zero. That is, for a lens in a lens group that satisfies an Abbe number greater than 30, the radius of curvature of its object side and the radius of curvature of its image side can both be positive or both be negative.

[0047] In an exemplary embodiment, the plurality of abutting members in the lens may include: a third abutting member located on the image side of the third lens and at least partially contacting the image side surface of the third lens; a fourth abutting member located on the image side of the fourth lens and at least partially contacting the image side surface of the fourth lens; a fifth abutting member located on the image side of the fifth lens and at least partially contacting the image side surface of the fifth lens; a sixth abutting member located on the image side of the sixth lens and at least partially contacting the image side surface of the sixth lens; and a seventh abutting member located on the image side of the seventh lens and at least partially contacting the image side surface of the seventh lens.

[0048] In an exemplary embodiment, the imaging system of the present application may satisfy the conditional formula 1.2 < f / EPD < 1.8, where f is the effective focal length of the imaging system and EPD is the entrance pupil diameter of the imaging system.

[0049] In an exemplary embodiment, the imaging system of the present application may satisfy the conditional formula 3.7 < (V7 + V8) / V6 < 5.5, where V7 is the Abbe number of the seventh lens, V8 is the Abbe number of the eighth lens, and V6 is the Abbe number of the sixth lens.

[0050] In an exemplary embodiment, the imaging system of the present application may satisfy the conditional formula -6 mm < (D0s + D0m) × EPD / f5 < -1 mm, where D0s is the outer diameter of the object-side end face of the lens barrel (i.e., the end face or surface of the lens barrel closest to the object side), D0m is the outer diameter of the image-side end face of the lens barrel (i.e., the end face or surface of the lens barrel closest to the image side), EPD is the entrance pupil diameter of the imaging system, and f5 is the effective focal length of the fifth lens.

[0051] An imaging system according to an embodiment of the present application includes a lens barrel, an eight-piece lens group accommodated in the lens barrel, and a plurality of abutting members. Among them, the first lens to the eighth lens are arranged in sequence from the object side to the image side along the optical axis, and third abutting members, fourth abutting members, fifth abutting members, sixth abutting members, and seventh abutting members that are at least partially in contact with the image side surfaces of the third lens, the fourth lens, the fifth lens, the sixth lens, and the seventh lens are respectively provided on the image sides of the third lens, the fourth lens, the fifth lens, the sixth lens, and the seventh lens; for the lens in the lens group that satisfies the Abbe number being greater than 30, the product of the curvature radius values of its object side surface and image side surface is greater than zero. Through such a setting of the lens, and controlling the effective focal length f of the imaging system and the entrance pupil diameter EPD to satisfy the conditional formula 1.2 < f / EPD < 1.8, and controlling the Abbe numbers V6, V7, and V8 of the sixth lens, the seventh lens, and the eighth lens to satisfy the conditional formula 3.7 < (V7 + V8) / V6 < 5.5, the relative thickness of the lens can be controlled, while ensuring the overall strength of the lens while meeting the large aperture of the lens, preventing the risk of cracking of the lens during the assembly process and affecting the overall imaging of the lens; on the premise that the imaging system satisfies the above conditional formulas 1.2 < f / EPD < 1.8 and 3.7 < (V7 + V8) / V6 < 5.5, at the same time controlling the outer diameter D0s of the object side end face of the lens barrel, the outer diameter D0m of the image side end face of the lens barrel, the entrance pupil diameter EPD of the lens, and the effective focal length f5 of the fifth lens to satisfy the conditional formula -6mm < (D0s + D0m)×EPD / f5 < -1mm, the overall lens can maintain a relatively large aperture, thereby improving the overall design of the lens, ensuring sufficient abutting space for each lens, and having a great improvement effect on the reliability performance of the lens assembly.

[0052] See Appendix Figure 23 and Figure 24 , the table in the figure shows the change amounts of the lens MTF (modulation transfer function) related parameters of the imaging system according to the embodiment of the present application before and after two rounds (1 - time and 2 - time shown in the table) of micro-drop tests. Specifically, the test can be carried out on a mobile phone micro-drop tester, and the test content can be set as follows: the drop height is 10 cm, the number of drops in each round is 500 times for each of the six sides and 5000 times for the front and back sides, a total of 13000 times; a total of 26000 drops are excited in two rounds of tests. Analyze Figure 23 and Figure 24As can be seen from the data in the table shown, before and after two rounds of tests, the change in the lens MTF of the imaging system according to the embodiments of the present application is within the required threshold range of 15, meeting the design requirements. Therefore, it can also be seen that when the effective focal length f of the control system of the imaging system according to the embodiments of the present application and the entrance pupil diameter EPD satisfy the conditional expression 1.2 < f / EPD < 1.8, and the Abbe numbers V6, V7, and V8 of the sixth lens, the seventh lens, and the eighth lens satisfy the conditional expression 3.7 < (V7 + V8) / V6 < 5.5, by controlling the outer diameter D0s of the object-side end face of the lens barrel, the outer diameter D0m of the image-side end face of the lens barrel, the entrance pupil diameter EPD of the lens, and the effective focal length f5 of the fifth lens to satisfy the conditional expression -6 mm < (D0s + D0m) × EPD / f5 < -1 mm, it is beneficial to improve the overall design of the lens, ensure sufficient bearing space for each lens, and greatly improve the reliability performance of the lens assembly.

[0053] In an exemplary embodiment, the first lens may have a positive optical power, with its object side surface being convex and its image side surface being concave. The second lens may have a negative optical power, with its object side surface being convex and its image side surface being concave. The third lens may have a negative optical power, with its object side surface being convex and its image side surface being concave. The fourth lens may have a positive optical power, with its object side surface being convex and its image side surface being convex. The fifth lens may have a negative optical power, with its object side surface being concave and its image side surface being convex. The sixth lens may have a negative optical power, with its object side surface being concave and its image side surface being convex. The seventh lens may have a positive optical power, with its object side surface being convex and its image side surface being convex. The eighth lens may have a negative optical power, with its object side surface being convex and its image side surface being concave.

[0054] In an exemplary embodiment, the plurality of bearing members in the lens may further include: a first bearing member located on the image side of the first lens and at least partially contacting the image side surface of the first lens.

[0055] In an exemplary embodiment, the plurality of bearing members in the lens may further include: a second bearing member located on the image side of the second lens and at least partially contacting the image side surface of the second lens.

[0056] In an exemplary embodiment, the imaging system of the present application can satisfy the conditional formula -0.1 < (D3m + D6s) / (f3 - f6) < 1.5, where D3m is the outer diameter of the image side surface of the third bearing member, D6s is the outer diameter of the object side surface of the sixth bearing member, f3 is the effective focal length of the third lens, and f6 is the effective focal length of the sixth lens. By controlling the outer diameter of the image side surface of the third bearing member, the outer diameter of the object side surface of the sixth bearing member, the effective focal length of the third lens, and the effective focal length of the sixth lens to satisfy the conditional formula -0.1 < (D3m + D6s) / (f3 - f6) < 1.5, the smoothness and easy formability of the effective surface of the lens (the aspherical surface for transmitting effective light) can be improved, ensuring that the third lens and the sixth lens do not have a large surface curvature, enhancing the stability during lens assembly, reducing assembly deformation, and improving imaging quality; at the same time, by controlling D3m and D6s, a stable step difference can be designed for the third bearing member and the sixth bearing member, ensuring their assembly stability.

[0057] In an exemplary embodiment, the imaging system of the present application can satisfy the conditional formula 0.5 < tan(Semi-FOV) × f / L < 0.9, where Semi-FOV is half of the maximum field of view angle of the imaging system, f is the effective focal length of the imaging system, and L is the maximum height of the lens barrel, that is, the maximum distance on the optical axis from the object side end face of the lens barrel to the image side end face of the lens barrel. By controlling half of the maximum field of view angle of the imaging system, the effective focal length of the imaging system, and the maximum height of the lens barrel to satisfy the conditional formula 0.5 < tan(Semi-FOV) × f / L < 0.9, the shooting field of view angle can be greatly increased within a shorter lens barrel length, which is beneficial to improving the lightweight design index of the lens, reducing the motor driving load, and improving the focusing efficiency of the module.

[0058] In an exemplary embodiment, the imaging system of the present application can satisfy the conditional formula 0.5 < TD / (d0m - d0s) < 2, where TD is the distance on the optical axis from the object side surface of the first lens to the image side surface of the eighth lens, d0m is the inner diameter of the image side end face of the lens barrel closest to the image side, and d0s is the inner diameter of the object side end face of the lens barrel closest to the object side. By controlling the distance on the optical axis from the object side surface of the first lens to the image side surface of the eighth lens and the inner diameters of the image side end face and the object side end face of the lens barrel to satisfy the conditional formula 0.5 < TD / (d0m - d0s) < 2, it is beneficial to the design of the overall height of the lens; at the same time, the light transmission quality of the optical system can be effectively controlled. On the premise of ensuring the image height matching the chip, the marginal light is controlled to be away from the object side end face of the lens barrel and the inclined plane position connected to the object side end face and the light outlet position at the end of the lens barrel, avoiding the generation of concentric circular arc stray light of the light source and red arc stray light at these two places respectively.

[0059] In an exemplary embodiment, the imaging system of this application can satisfy the condition 0<(d7s+D7m) / |f7+f8|<8, where d7s is the inner diameter of the object-side surface of the seventh support member, D7m is the outer diameter of the image-side surface of the seventh support member, f7 is the effective focal length of the seventh lens, and f8 is the effective focal length of the eighth lens. By controlling the inner diameter of the object-side surface of the seventh support member, the outer diameter of the image-side surface of the seventh support member, the effective focal length of the seventh lens, and the effective focal length of the eighth lens to satisfy the condition 0<(d7s+D7m) / |f7+f8|<8, the smoothness and formability of the effective surface of the lens (the aspherical surface used to transmit effective light) can be improved; at the same time, stray light paths can be effectively blocked, reducing the risk of stray light; in addition, a relatively stable aperture step can be obtained, and a stable step can be obtained after assembling the seventh lens, the seventh support member, and the eighth lens.

[0060] In an exemplary embodiment, the imaging system of this application can satisfy the conditions -7.5<(d7s+d7m) / (R14+R15)<-1.5 and 8<(R13-R16) / (CP7+T78+CT8)<19, where d7s is the inner diameter of the object side of the seventh support member, d7m is the inner diameter of the image side of the seventh support member, R14 is the radius of curvature of the image side of the seventh lens, R15 is the radius of curvature of the object side of the eighth lens, R13 is the radius of curvature of the object side of the seventh lens, R16 is the radius of curvature of the image side of the eighth lens, CP7 is the thickness of the seventh support member, T78 is the air gap between the seventh and eighth lenses on the optical axis, and CT8 is the center thickness of the eighth lens on the optical axis. By controlling the inner diameter of the object side of the seventh support member, the inner diameter of the image side of the seventh support member, the radius of curvature of the image side of the seventh lens, and the radius of curvature of the object side of the eighth lens to satisfy the condition -7.5 < (d7s + d7m) / (R14 + R15) < -1.5, and controlling the radius of curvature of the object side of the seventh lens, the radius of curvature of the image side of the eighth lens, the thickness of the seventh support member, the air gap between the seventh and eighth lenses on the optical axis, and the center thickness of the eighth lens on the optical axis to satisfy 8 < (R13 - R16) / (CP7 + T78 + CT8) < 19, the light intake of the lens can be significantly improved. Under the same aperture conditions, the relative illumination of the lens is improved, and the field of view of the lens is increased. At the same time, the cross stray light and trailing stray light reflected from the inner diameter surface of the spacer ring can be reduced. In addition, it is beneficial to the uniformity of the edge and center thickness of the eighth lens, and can effectively avoid assembly interference.

[0061] In an exemplary embodiment, the imaging system of this application can satisfy the condition 0 < (T45 + T56) / (CP4 + CP6) < 22, where T45 is the air gap between the fourth and fifth lenses on the optical axis, T56 is the air gap between the fifth and sixth lenses on the optical axis, CP4 is the thickness of the fourth support member, and CP6 is the thickness of the sixth support member. By controlling the air gaps between the fourth and fifth lenses on the optical axis, the air gaps between the fifth and sixth lenses on the optical axis, the thickness of the fourth support member, and the thickness of the sixth support member to satisfy the condition 0 < (T45 + T56) / (CP4 + CP6) < 22, the assembly deformation and baking deformation of the fourth and sixth support members can be significantly reduced, thereby reducing the risk of assembly deformation and baking deformation. In addition, the air gaps between the fourth, fifth, and sixth lenses on the optical axis can be controlled to be stable and within a reasonable range, which is beneficial to improving assembly stability and consistency, and is more conducive to adjusting field curvature and improving lens performance.

[0062] In an exemplary embodiment, the imaging system of this application can satisfy the condition 0<(d5s+D5m) / ∣R8-R9∣<18, where d5s is the inner diameter of the object-side surface of the fifth support member, D5m is the outer diameter of the image-side surface of the fifth support member, R8 is the radius of curvature of the image-side surface of the fourth lens, and R9 is the radius of curvature of the object-side surface of the fifth lens. By controlling the inner diameter of the object-side surface of the fifth support member, the outer diameter of the image-side surface of the fifth support member, the radius of curvature of the image-side surface of the fourth lens, and the radius of curvature of the object-side surface of the fifth lens to satisfy the condition 0<(d5s+D5m) / ∣R8-R9∣<18, the machinability of the fourth lens can be improved, the surface deviation, distortion, and appearance problems caused by molding can be reduced, and the production yield of the lens can be improved. In addition, when the inner and outer diameters of the fifth support member satisfy the above relationship, a stable support relationship can be formed with the fifth and sixth lenses, avoiding stray light generated by the deformation of the spacer.

[0063] In an exemplary embodiment, the imaging system of this application can satisfy the condition -16 < (d3m × D3s) / (f3 × CP3) < 0, where d3m is the inner diameter of the image-side surface of the third support member, D3s is the outer diameter of the object-side surface of the third support member, f3 is the effective focal length of the third lens, and CP3 is the thickness of the third support member. By controlling the inner diameter of the image-side surface of the third support member, the outer diameter of the object-side surface of the third support member, the effective focal length of the third lens, and the thickness of the third support member to satisfy the condition -16 < (d3m × D3s) / (f3 × CP3) < 0, it helps to improve the assembly stability of the front-end lens, improve the low yield problem caused by the fit amount, and at the same time, it helps to reasonably allocate the optical power and improve the imaging quality of the optical system.

[0064] In an exemplary embodiment, the imaging system of the present application can satisfy the conditional formula -1 < (EP45 - EP56) / (R8 - R9) < 1, where EP45 is the distance on the optical axis from the image side of the fourth bearing member to the object side of the fifth bearing member, EP56 is the distance on the optical axis from the image side of the fifth bearing member to the object side of the sixth bearing member, R8 is the radius of curvature of the image side of the fourth lens, and R9 is the radius of curvature of the object side of the fifth lens. By controlling the distance on the optical axis from the image side of the fourth bearing member to the object side of the fifth bearing member, the distance on the optical axis from the image side of the fifth bearing member to the object side of the sixth bearing member, the radius of curvature of the image side of the fourth lens, and the radius of curvature of the object side of the fifth lens to satisfy the conditional formula -1 < (EP45 - EP56) / (R8 - R9) < 1, it is beneficial to reduce the machining angular spread of the radii of curvature of the fourth and fifth lenses and facilitate machining and forming; at the same time, by controlling the axial distance from the fourth bearing member to the fifth bearing member and the axial distance from the fifth bearing member to the sixth bearing member, it is beneficial to control the edge thickness of the lens and facilitate machining and forming.

[0065] In an exemplary embodiment, the imaging system of the present application can satisfy the conditional formula -12 < f2 × (V2 - V3) / d2s < -6, where f2 is the effective focal length of the second lens, V2 is the Abbe number of the second lens, V3 is the Abbe number of the third lens, and d2s is the inner diameter of the object side of the second bearing member. By controlling the effective focal length of the second lens, the Abbe number of the second lens, the Abbe number of the third lens, and the inner diameter of the object side of the second bearing member to satisfy the conditional formula -12 < f2 × (V2 - V3) / d2s < -6, it is beneficial to the design of the second and third lenses and improve the light transmission ability of the optical system; at the same time, by controlling the inner diameter of the object side of the second bearing member, the stray light path generated by the second lens can be effectively blocked and the stray light path incident on the third lens can be reduced, reducing the risk of stray light.

[0066] In an exemplary embodiment, the imaging system of the present application can satisfy the conditional formula 4 < TD / EP01 + TD / L < 6, where TD is the distance on the optical axis from the object side of the first lens to the image side of the eighth lens, EP01 is the distance on the optical axis from the object side end face of the lens barrel to the object side of the first bearing member, and L is the maximum height of the lens barrel. By controlling the distance on the optical axis from the object side of the first lens to the image side of the eighth lens, the distance on the optical axis from the object side end face of the lens barrel to the object side of the first bearing member, and the maximum height of the lens barrel to satisfy the conditional formula 4 < TD / EP01 + TD / L < 6, it is possible to effectively increase the shooting field angle within a shorter lens barrel length and aperture, reduce the size of the lens tail, and is beneficial to improving the lightweight design index of the lens and the focusing efficiency of the module.

[0067] In an exemplary embodiment, the imaging system of the present application can satisfy the conditional formula 1 < d1s / djs < 3, where j = 2, 3, or 4, d1s is the inner diameter of the object side of the first bearing member, and djs is the inner diameter of the object side of the j-th bearing member, j = 2, 3, or 4. By controlling the ratio of the inner diameter of the object side of the first bearing member to the inner diameter of the object side of the j-th bearing member within this range, it can be ensured that the inner diameter of the first bearing member is always greater than the inner diameters of the second, third, and fourth bearing members. On the premise of ensuring sufficient incident light, the subsequent three bearing members can effectively block the stray light paths generated by the previous lenses, improving the clarity of imaging.

[0068] In an exemplary embodiment, the imaging system of the present application can satisfy the conditional formula 2 < f6×EP67 / D6m / SAG62 < 39, where f6 is the effective focal length of the sixth lens, EP67 is the distance on the optical axis from the image side of the sixth bearing member to the object side of the seventh bearing member, D6m is the outer diameter of the image side of the sixth bearing member, and SAG62 is the distance on the optical axis from the intersection of the image side of the sixth lens and the optical axis to the maximum effective semi-aperture position on the image side of the sixth lens. By controlling the effective focal length of the sixth lens, the distance on the optical axis from the image side of the sixth bearing member to the object side of the seventh bearing member, the outer diameter of the image side of the sixth bearing member, and the distance on the optical axis from the intersection of the image side of the sixth lens and the optical axis to the maximum effective semi-aperture position on the image side of the sixth lens to satisfy the conditional formula 2 < f6×EP67 / D6m / SAG62 < 39, it is beneficial to reduce the curvature of the image side of the sixth lens and is beneficial to processing and forming; at the same time, the control of the axial distance from the sixth bearing member to the seventh bearing member and the outer diameter of the image side of the sixth bearing member is beneficial to lens bearing and increases the stability of the lens.

[0069] In an exemplary embodiment, the imaging system of the present application can satisfy the condition -5 < (SAG51 + SAG52) / EP56 < -1, where SAG51 is the distance on the optical axis from the intersection of the object side of the fifth lens and the optical axis to the maximum effective semi-aperture of the object side of the fifth lens, SAG52 is the distance on the optical axis from the intersection of the image side of the fifth lens and the optical axis to the maximum effective semi-aperture of the image side of the fifth lens, and EP56 is the distance on the optical axis from the image side of the fifth support member to the object side of the sixth support member. By controlling the distance on the optical axis from the intersection of the object side of the fifth lens and the optical axis to the maximum effective semi-aperture of the object side of the fifth lens, the distance on the optical axis from the intersection of the image side of the fifth lens and the optical axis to the maximum effective semi-aperture of the image side of the fifth lens, and the distance on the optical axis from the image side of the fifth support member to the object side of the sixth support member to satisfy the condition -5 < (SAG51 + SAG52) / EP56 < -1, it is beneficial to reduce the curvature of the effective aperture of the fifth lens and is beneficial to processing and forming; at the same time, by controlling the distance between the fifth support member and the sixth support member on the optical axis, the assembly stability can be improved, stray light can be reduced, and high image quality can be obtained. At the same time, the edge thickness of the sixth lens is ensured, which is beneficial to the processing and forming of the sixth lens.

[0070] In an exemplary embodiment, the imaging system of the present application can satisfy: when R n / R n-1 < 0, 0 < fi / dis < 6, where i = 1, 2, 3, 4, 5, 6 or 7, i = n / 2, R n is the radius of curvature of the image side of the i-th lens in the lens group, R n-1 is the radius of curvature of the object side of the i-th lens, fi is the effective focal length of the i-th lens, and dis is the inner diameter of the object side of the i-th support member. By controlling the radius of curvature of the image side of the i-th lens and the radius of curvature of the object side of the i-th lens in the lens group to satisfy R n / R n-1 < 0, the effective focal length of the i-th lens and the inner diameter of the object side of the i-th support member satisfy 0 < fi / dis < 6, which is beneficial to the processing and forming of the lens; at the same time, it is beneficial to control the effective focal length of the lens and is beneficial to the design of the field angle; in addition, the inner diameter of the object side of the rear support member of the lens can be controlled to effectively block the stray light path and improve the imaging quality.

[0071] In an exemplary embodiment, the imaging system of the present application may include at least one aperture. The aperture can restrict the light path and control the light intensity. The aperture can be set at an appropriate position in the imaging system. For example, the aperture can be set between the object side and the first lens.

[0072] In an exemplary embodiment, optionally, the above imaging system may further include a filter for correcting color deviation and / or a protective glass for protecting the photosensitive element located on the imaging surface.

[0073] In an exemplary embodiment, one or more aspherical surfaces may be provided on the surfaces of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens, and the eighth lens. The aspherical surface has better radius of curvature characteristics, and has the advantages of improving distortion aberration and astigmatism aberration. By using the aspherical surface, it is possible to eliminate as much aberration as possible during imaging, thereby improving the imaging quality.

[0074] The imaging system according to an embodiment of the present application includes a lens barrel and an eight-piece lens group and a plurality of supporting members accommodated in the lens barrel. Among them, the first lens to the eighth lens are arranged in sequence from the object side to the image side along the optical axis. Third supporting members, fourth supporting members, fifth supporting members, sixth supporting members, and seventh supporting members that are at least partially in contact with the image side surfaces of the third lens, the fourth lens, the fifth lens, the sixth lens, and the seventh lens are respectively provided on the image sides of the third lens, the fourth lens, the fifth lens, the sixth lens, and the seventh lens; for a lens in the lens group that satisfies the Abbe number greater than 30, the product of the radius of curvature values of its object side surface and its image side surface is greater than zero. Through this setting of the lens, and controlling that the effective focal length f of the imaging system and the entrance pupil diameter EPD satisfy the conditional formula 1.2 < f / EPD < 1.8, and controlling the Abbe numbers V6, V7, and V8 of the sixth lens, the seventh lens, and the eighth lens to satisfy the conditional formula 3.7 < (V7 + V8) / V6 < 5.5, the relative thickness of the lens can be controlled, while ensuring the overall strength of the lens while meeting the large aperture of the lens, preventing the risk of cracking during the lens assembly process and affecting the overall imaging of the lens; on the premise that the imaging system satisfies the above conditional formulas 1.2 < f / EPD < 1.8 and 3.7 < (V7 + V8) / V6 < 5.5, at the same time controlling the outer diameter D0s of the object side end surface of the lens barrel, the outer diameter D0m of the image side end surface of the lens barrel, the entrance pupil diameter EPD of the lens, and the effective focal length f5 of the fifth lens to satisfy the conditional formula -6 mm < (D0s + D0m) × EPD / f5 < -1 mm, the lens can be kept with a relatively large aperture as a whole, thereby improving the overall design of the lens, ensuring sufficient supporting space for each lens, and greatly improving the reliability performance of the lens assembly.

[0075] On the other hand, an imaging system according to an embodiment of the present application includes a lens barrel, an eight-piece lens group accommodated in the lens barrel, and a plurality of abutting members. Among them, the first lens to the eighth lens are arranged in sequence from the object side to the image side along the optical axis. Third abutting members, fourth abutting members, fifth abutting members, sixth abutting members, and seventh abutting members that are at least partially in contact with the image side surfaces of the third lens, the fourth lens, the fifth lens, the sixth lens, and the seventh lens are respectively provided on the image sides of the third lens, the fourth lens, the fifth lens, the sixth lens, and the seventh lens; for a lens in the lens group with an Abbe number greater than 30, the product of the curvature radius values of its object side surface and image side surface is greater than zero. Through this setting of the lens, and controlling the outer diameter D3m of the image side surface of the third abutting member, the outer diameter D6s of the object side surface of the sixth abutting member, the effective focal length f3 of the third lens, and the effective focal length f6 of the sixth lens to satisfy the conditional formula -0.1 < (D3m + D6s) / (f3 - f6) < 1.5, the smoothness and easy formability of the effective surface of the lens (the aspherical surface for transmitting effective light) can be improved, it is ensured that the third lens and the sixth lens do not have a large surface shape curvature, the stability during lens assembly is improved, the assembly deformation is reduced, and the imaging quality is improved; at the same time, by controlling D3m and D6s, a stable step difference can be designed for the third abutting member and the sixth abutting member to ensure their assembly stability; and by controlling that half of the maximum field angle of the imaging system Semi-FOV, the effective focal length f of the imaging system, and the maximum height L of the lens barrel satisfy the conditional formula 0.5 < tan(Semi-FOV) × f / L < 0.9, the shooting field angle can be greatly increased within a relatively short lens barrel length, which is beneficial to improving the lightweight design index of the lens, reducing the motor driving load, and improving the focusing efficiency of the module.

[0076] On another aspect, the imaging system according to the embodiments of this application includes a lens barrel and an eight-lens group and a plurality of support members housed in the lens barrel. The first to eighth lenses are arranged sequentially from the object side to the image side along the optical axis. The image sides of the third, fourth, fifth, sixth and seventh lenses are respectively provided with a third support member, a fourth support member, a fifth support member, a sixth support member and a seventh support member, respectively, which are at least partially in contact with the image sides of the third, fourth, fifth, sixth and seventh lenses. Among the lens groups, the lenses that satisfy the Abbe number greater than 30 have a product of the radius of curvature values ​​of their object side and image side that is greater than zero. By configuring the lens in this way, and controlling the inner diameter d7s of the object side of the seventh support member, the inner diameter d7m of the image side of the seventh support member, the radius of curvature R14 of the image side of the seventh lens, and the radius of curvature R15 of the object side of the eighth lens to satisfy the condition -7.5 < (d7s + d7m) / (R14 + R15) < -1.5, and controlling the radius of curvature R13 of the object side of the seventh lens, the radius of curvature R16 of the image side of the eighth lens, the thickness CP7 of the seventh support member, and the... The air gap T78 between the seventh and eighth lenses on the optical axis and the center thickness CT8 of the eighth lens on the optical axis satisfy 8 < (R13-R16) / (CP7+T78+CT8) < 19, which can significantly increase the amount of light entering the lens, improve the relative illumination of the lens under the same aperture, and increase the field of view of the lens; at the same time, it can reduce the cross stray light and trailing stray light reflected from the inner diameter surface of the spacer ring; in addition, it is also beneficial to the uniformity of the edge and center thickness of the eighth lens, and can effectively avoid assembly interference.

[0077] However, those skilled in the art will understand that, without departing from the technical solutions claimed in this application, the number of lenses constituting the imaging system and the number of support members can be changed to obtain the various results and advantages described in this specification, and this application does not specifically limit them. For example, although eight lenses are described as an example in the embodiments, the imaging system is not limited to including eight lenses. If necessary, the imaging system may also include other numbers of lenses. Furthermore, as needed, the imaging system may also include other numbers of support members than those described in the above embodiments.

[0078] Specific embodiments of the imaging system applicable to the above-described embodiments are further described below with reference to the accompanying drawings.

[0079] Example 1

[0080] The following is for reference Figure 2 An imaging system according to Embodiment 1 of this application is described.

[0081] like Figure 2As shown, in this embodiment, the imaging system includes a lens barrel P0 and a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, and an eighth lens E8 arranged sequentially along the optical axis from the object side to the image side, housed in the lens barrel P0.

[0082] In this embodiment, the imaging system further includes a plurality of support members: a first support member P1, located on the image side of the first lens E1 and at least partially in contact with the image side surface of the first lens E1; a second support member P2, located on the image side of the second lens E2 and at least partially in contact with the image side surface of the second lens E2; a third support member P3, located on the image side of the third lens E3 and at least partially in contact with the image side surface of the third lens E3; a fourth support member P4, located on the image side of the fourth lens E4 and at least partially in contact with the image side surface of the fourth lens E4; a fifth support member P5, located on the image side of the fifth lens E5 and at least partially in contact with the image side surface of the fifth lens E5; a sixth support member P6, located on the image side of the sixth lens E6 and at least partially in contact with the image side surface of the sixth lens E6; and a seventh support member P7, located on the image side of the seventh lens E7 and at least partially in contact with the image side surface of the seventh lens E7.

[0083] In this embodiment, the first lens E1 has positive optical power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative optical power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens E3 has negative optical power, with its object-side surface S5 being convex and its image-side surface S6 being concave. The fourth lens E4 has positive optical power, with its object-side surface S7 being convex and its image-side surface S8 being convex. The fifth lens E5 has negative optical power, with its object-side surface S9 being concave and its image-side surface S10 being convex. The sixth lens E6 has negative optical power, with its object-side surface S11 being concave and its image-side surface S12 being convex. The seventh lens E7 has positive optical power, with its object-side surface S13 being convex and its image-side surface S14 being convex. The eighth lens E8 has negative optical power, with its object-side surface S15 being convex and its image-side surface S16 being concave.

[0084] Table 1 shows the basic parameters of the imaging system of Example 1, where the units for radius of curvature and thickness / distance are millimeters (mm).

[0085]

[0086]

[0087] Table 1

[0088] In Embodiment 1, the object-side surface and image-side surface of any one of the first lens E1 to the eighth lens E8 are aspherical surfaces, and the surface shape x of each aspherical lens can be defined using, but is not limited to, the following aspherical formula:

[0089]

[0090] Where x is the distance vector from the vertex of the aspherical surface at a height of h along the optical axis; c is the paraxial curvature of the aspherical surface, c = 1 / R (i.e., the paraxial curvature c is the reciprocal of the radius of curvature R in Table 1 above); k is the conic coefficient; Ai is the i-th order correction coefficient of the aspherical surface. Tables 2-1 and 2-2 below give the higher-order coefficients A4, A6, A8, A16, A27, A18, A19 ... 10 A 12 A 14 A 16 A 18 A 20 A 22 A 24 A 26 A 28 and A 30 .

[0091] Face number A4 A6 A8 A10 A12 A14 A16 S1 1.4609E-01 -8.6480E-03 -4.6744E-03 -7.6083E-03 -1.1706E-03 -1.4127E-03 3.7638E-04 S2 -1.0207E-01 1.2139E-02 -1.6838E-02 5.3607E-03 -2.9414E-03 1.5870E-03 -9.5732E-04 S3 -2.3117E-01 5.1838E-02 -1.9528E-03 6.9016E-03 -1.2437E-03 1.2426E-03 -5.7642E-04 S4 -1.1014E-01 1.9111E-02 4.8795E-03 2.4658E-03 9.8412E-04 5.1434E-04 2.2483E-04 S5 -1.9625E-01 -1.1136E-02 -1.5636E-04 2.0986E-04 2.1916E-04 9.4379E-05 3.3618E-05 S6 -1.9045E-01 1.0936E-02 4.3500E-03 6.5785E-04 1.0386E-03 4.5287E-04 7.2631E-05 S7 -1.4187E-01 -1.9824E-03 -1.0004E-03 -8.1197E-04 1.4335E-03 8.9155E-04 2.6788E-04 S8 -3.1557E-01 -1.6084E-02 -1.0056E-03 -2.1235E-03 1.1947E-03 5.1431E-04 1.8592E-04 S9 -5.0627E-01 7.7885E-02 1.5913E-02 -3.2874E-03 6.0299E-04 1.8219E-03 -1.5879E-03 S10 -5.0888E-01 -2.4460E-02 9.1642E-03 1.0977E-02 -7.6583E-03 5.2870E-03 -1.9770E-03 S11 3.7399E-03 -3.7467E-02 -4.6038E-02 4.7830E-02 -2.7196E-02 1.2018E-02 -5.4962E-03 S12 -2.4319E-01 2.1213E-01 -5.8687E-02 3.2844E-02 -1.4313E-02 1.6155E-03 -3.0901E-04 S13 -4.7459E-01 -4.3356E-01 2.6185E-01 -8.7422E-02 2.9348E-02 -2.9159E-02 1.6537E-02 S14 1.1888E+00 -6.4724E-01 4.2513E-01 -2.1865E-01 7.7233E-02 -3.9393E-02 2.7634E-02 S15 -4.6530E+00 1.3172E+00 -4.1161E-01 1.0857E-01 -1.7671E-02 -5.9046E-03 6.7374E-03 S16 -8.9609E+00 1.9862E+00 -6.5877E-01 2.8635E-01 -1.2849E-01 5.4445E-02 -2.5996E-02

[0092] Table 2-1

[0093]

[0094]

[0095] Table 2-2

[0096] Example 2

[0097] The following is for reference Figure 3 An imaging system according to Embodiment 2 of this application is described.

[0098] like Figure 3As shown, in this embodiment, the imaging system includes a lens barrel P0 and a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, and an eighth lens E8 arranged sequentially along the optical axis from the object side to the image side, housed in the lens barrel P0. The imaging system also includes a plurality of support members: a first support member P1, located on the image side of the first lens E1 and in at least partial contact with the image side surface of the first lens E1; a second support member P2, located on the image side of the second lens E2 and in at least partial contact with the image side surface of the second lens E2; a third support member P3, located on the image side of the third lens E3 and in at least partial contact with the image side surface of the third lens E3; a fourth support member P4, located on the image side of the fourth lens E4 and in at least partial contact with the image side surface of the fourth lens E4; a fifth support member P5, located on the image side of the fifth lens E5 and in at least partial contact with the image side surface of the fifth lens E5; a sixth support member P6, located on the image side of the sixth lens E6 and in at least partial contact with the image side surface of the sixth lens E6; and a seventh support member P7, located on the image side of the seventh lens E7 and in at least partial contact with the image side surface of the seventh lens E7.

[0099] The structure of the imaging system in this embodiment is the same as that of the imaging system in Embodiment 1. That is, the basic parameter table of the imaging system in this embodiment is the same as that in Table 1, and the table of higher-order coefficients of the aspherical mirror is the same as that in Tables 2-1 and 2-2.

[0100] The difference between this embodiment and Embodiment 1 lies in the structural dimensions of the lens barrel and some of the supporting components, as well as the spacing of some of the supporting components along the optical axis. The values ​​of several parameters of the lens barrel and supporting components included in the imaging systems of this embodiment and Embodiment 1 are shown in Table 7 below. These parameters specifically include:

[0101] The inner diameter d1s of the object side surface of the first support member P1, the inner diameter d2s of the object side surface of the second support member P2, the inner diameter d3s of the object side surface of the third support member P3, the inner diameter d3m of the image side surface of the third support member P3, the outer diameter D3s of the object side surface of the third support member P3, the outer diameter D3m of the image side surface of the third support member P3, the inner diameter d4s of the object side surface of the fourth support member P4, the inner diameter d5s of the object side surface of the fifth support member P5, the outer diameter D5m of the image side surface of the fifth support member P5, the outer diameter D6s of the object side surface of the sixth support member P6, the outer diameter D6m of the image side surface of the sixth support member P6, the inner diameter d7s of the object side surface of the seventh support member P7, the inner diameter d7m of the image side surface of the seventh support member P7, the outer diameter D7m of the image side surface of the seventh support member P7, and the inner diameter d0 of the object side end face of the lens tube P0 closest to the object side. s, the inner diameter d0m of the image-side end face of the lens barrel P0 closest to the image side, the outer diameter D0s of the object-side end face of the lens barrel P0 closest to the object side, the outer diameter D0m of the image-side end face of the lens barrel P0 closest to the image side, the distance EP01 from the object-side end face of the lens barrel P0 to the object-side surface of the first support member P1 on the optical axis, the thickness CP3 of the third support member P3, the thickness CP4 of the fourth support member P4, the distance EP45 from the image-side surface of the fourth support member P4 to the object-side surface of the fifth support member P5 on the optical axis, the distance EP56 from the image-side surface of the fifth support member P5 to the object-side surface of the sixth support member P6 on the optical axis, the thickness CP6 of the sixth support member P6, the distance EP67 from the image-side surface of the sixth support member P6 to the object-side surface of the seventh support member P7 on the optical axis, the thickness CP7 of the seventh support member P7, and the maximum height L of the lens barrel P0. The units for all parameter values ​​shown in Table 7 are millimeters (mm), and the schematic diagrams of each parameter in the imaging system structure are as follows: Figure 1 As shown.

[0102] Example 3

[0103] The following is for reference Figure 4 The optical lens according to Embodiment 3 of this application is described.

[0104] like Figure 4As shown, in this embodiment, the imaging system includes a lens barrel P0 and a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, and an eighth lens E8 arranged sequentially along the optical axis from the object side to the image side, housed in the lens barrel P0. The imaging system also includes a plurality of support members: a first support member P1, located on the image side of the first lens E1 and in at least partial contact with the image side surface of the first lens E1; a second support member P2, located on the image side of the second lens E2 and in at least partial contact with the image side surface of the second lens E2; a third support member P3, located on the image side of the third lens E3 and in at least partial contact with the image side surface of the third lens E3; a fourth support member P4, located on the image side of the fourth lens E4 and in at least partial contact with the image side surface of the fourth lens E4; a fifth support member P5, located on the image side of the fifth lens E5 and in at least partial contact with the image side surface of the fifth lens E5; a sixth support member P6, located on the image side of the sixth lens E6 and in at least partial contact with the image side surface of the sixth lens E6; and a seventh support member P7, located on the image side of the seventh lens E7 and in at least partial contact with the image side surface of the seventh lens E7.

[0105] The structure of the imaging system in this embodiment is the same as that of the imaging system in Embodiment 1. That is, the basic parameter table of the imaging system in this embodiment is the same as that in Table 1, and the table of higher-order coefficients of the aspherical mirror is the same as that in Tables 2-1 and 2-2.

[0106] The difference between this embodiment and Embodiment 1 lies in the structural dimensions of the lens barrel and some of the supporting components, as well as the spacing of some of the supporting components along the optical axis. The values ​​of multiple parameters of the lens barrel and supporting components included in the imaging system of this embodiment and Embodiment 1 are also shown in Table 7 below. The specific descriptions of these multiple parameters are the same as those in Embodiment 2 above, and will not be repeated here.

[0107] Figure 5 The on-axis chromatic aberration curves of the imaging systems of Embodiments 1, 2 and 3 are shown, which represent the deviation of the convergence focal point of light of different wavelengths after passing through the lens. Figure 6 Astigmatism curves of the imaging systems of Examples 1, 2, and 3 are shown, representing the meridional and sagittal plane curvatures. Figure 7 The distortion curves of the imaging systems of Examples 1, 2 and 3 are shown, representing the distortion magnitude values ​​corresponding to different image heights. Figure 8 The magnification chromatic aberration curves of the imaging systems of Embodiments 1, 2, and 3 are shown, representing the deviations in image height at different points on the imaging plane after light passes through the lens. According to... Figures 5 to 8 It can be seen that the imaging systems given in Examples 1, 2 and 3 can achieve good imaging quality.

[0108] Example 4

[0109] The following is for reference Figure 9 An imaging system according to Embodiment 4 of this application is described.

[0110] like Figure 9 As shown, in this embodiment, the imaging system includes a lens barrel P0 and a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, and an eighth lens E8 arranged sequentially along the optical axis from the object side to the image side, housed in the lens barrel P0.

[0111] In this embodiment, the imaging system further includes a plurality of support members: a first support member P1, located on the image side of the first lens E1 and at least partially in contact with the image side surface of the first lens E1; a second support member P2, located on the image side of the second lens E2 and at least partially in contact with the image side surface of the second lens E2; a third support member P3, located on the image side of the third lens E3 and at least partially in contact with the image side surface of the third lens E3; a fourth support member P4, located on the image side of the fourth lens E4 and at least partially in contact with the image side surface of the fourth lens E4; a fifth support member P5, located on the image side of the fifth lens E5 and at least partially in contact with the image side surface of the fifth lens E5; a sixth support member P6, located on the image side of the sixth lens E6 and at least partially in contact with the image side surface of the sixth lens E6; and a seventh support member P7, located on the image side of the seventh lens E7 and at least partially in contact with the image side surface of the seventh lens E7.

[0112] In this embodiment, the first lens E1 has positive optical power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative optical power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens E3 has negative optical power, with its object-side surface S5 being convex and its image-side surface S6 being concave. The fourth lens E4 has positive optical power, with its object-side surface S7 being convex and its image-side surface S8 being convex. The fifth lens E5 has negative optical power, with its object-side surface S9 being concave and its image-side surface S10 being convex. The sixth lens E6 has negative optical power, with its object-side surface S11 being concave and its image-side surface S12 being convex. The seventh lens E7 has positive optical power, with its object-side surface S13 being convex and its image-side surface S14 being convex. The eighth lens E8 has negative optical power, with its object-side surface S15 being convex and its image-side surface S16 being concave.

[0113] Table 3 shows the basic parameters of the imaging system of Example 4, where the units for radius of curvature and thickness / distance are millimeters (mm).

[0114]

[0115] Table 3

[0116] In this embodiment, the object-side surface and image-side surface of any one of the first lens E1 to the eighth lens E8 are aspherical surfaces. The shape of each aspherical surface can be defined by formula (1) given in embodiment 1 above. Tables 4-1 and 4-2 show the higher-order coefficients A4, A6, A8, and A6 that can be used for each aspherical mirror surface S1 to S16 in this embodiment. 10 A 12 A 14 A 16 A 18 A 20 A 22 A 24 A 26 A 28 and A 30 .

[0117] Face number A4 A6 A8 A10 A12 A14 A16 S1 1.4076E-01 4.2914E-04 -5.6810E-03 -5.2859E-03 -1.7545E-03 -9.3857E-04 -5.8697E-05 S2 -9.9331E-02 1.4990E-02 -1.4953E-02 4.9913E-03 -2.9130E-03 1.4863E-03 -8.6165E-04 S3 -2.2919E-01 4.8346E-02 -3.9182E-03 5.5676E-03 -1.2758E-03 1.1372E-03 -4.8986E-04 S4 -1.0184E-01 2.2656E-02 4.1308E-03 2.0796E-03 9.6790E-04 5.8473E-04 2.9500E-04 S5 -2.0028E-01 -4.8992E-03 -1.6913E-03 2.3338E-04 4.1769E-04 1.4436E-04 2.1239E-05 S6 -1.7921E-01 9.4032E-03 3.9991E-04 6.2929E-04 3.2024E-05 -4.1204E-04 -2.1759E-04 S7 -1.2468E-01 -2.7141E-03 -8.5601E-04 4.6531E-04 3.5024E-04 -2.2632E-04 -4.0352E-04 S8 -2.9632E-01 3.1647E-03 5.8165E-03 3.2474E-03 2.3289E-03 6.3963E-04 -2.2152E-04 S9 -4.9407E-01 7.0957E-02 1.3914E-02 -2.3965E-03 1.5152E-03 1.2309E-03 -9.5782E-04 S10 -4.8910E-01 -2.3413E-02 1.0825E-02 1.1112E-02 -4.4335E-03 4.6220E-03 -6.9747E-04 S11 7.9583E-02 -1.4117E-01 -6.4475E-02 1.9195E-02 2.1373E-02 9.3757E-03 7.7872E-03 S12 -2.8011E-01 1.8589E-01 -6.1259E-02 3.6761E-02 -1.3000E-02 2.7184E-03 -8.1957E-04 S13 -3.1351E-01 -5.3050E-01 2.4684E-01 -7.5514E-02 3.6186E-02 -2.9443E-02 1.1049E-02 S14 1.2392E+00 -6.4075E-01 4.4034E-01 -2.0526E-01 7.2306E-02 -3.5086E-02 2.4349E-02 S15 -4.6514E+00 1.2551E+00 -4.0270E-01 1.0046E-01 -1.1726E-02 -6.3179E-03 3.4333E-03 S16 -8.8980E+00 1.8942E+00 -6.7607E-01 2.6699E-01 -1.1715E-01 4.9203E-02 -2.1557E-02

[0118] Table 4-1

[0119] Face number A18 A20 A22 A24 A26 A28 A30 S1 -1.2006E-04 8.4131E-05 -4.8468E-05 3.2400E-05 -1.7958E-05 2.3159E-05 -9.2156E-06 S2 4.8943E-04 -2.9414E-04 1.8038E-04 -1.0222E-04 4.8519E-05 -1.6419E-05 2.6144E-06 S3 3.1540E-04 -1.7299E-04 1.0716E-04 -5.3537E-05 2.4392E-05 -5.8942E-06 -1.8610E-06 S4 1.7521E-04 8.5516E-05 4.7604E-05 1.7908E-05 8.9817E-06 3.6125E-06 -1.3227E-07 S5 2.0130E-06 1.7354E-06 6.1672E-06 4.3426E-06 1.3361E-06 -2.2755E-06 -1.5157E-06 S6 3.1186E-05 1.4428E-04 1.4922E-04 1.1357E-04 6.7353E-05 3.1530E-05 7.3782E-06 S7 -2.7062E-04 -1.5754E-04 -6.2771E-05 -3.1262E-05 -6.1232E-06 -3.7102E-06 1.3540E-06 S8 -4.3895E-04 -3.7774E-04 -2.6050E-04 -1.4482E-04 -7.2605E-05 -2.8474E-05 -1.1626E-05 S9 6.5536E-05 -9.8072E-05 3.0040E-05 -2.9886E-05 3.1869E-05 -1.8808E-05 1.8730E-05 S10 3.6797E-04 -2.6103E-04 8.9982E-05 -1.1835E-04 1.3657E-05 -5.3613E-05 -7.7541E-06 S11 4.7243E-03 1.9233E-03 1.7685E-03 1.1082E-03 5.7918E-04 2.1030E-04 2.7378E-05 S12 1.8945E-03 -1.5646E-03 -1.9051E-04 -2.4495E-04 3.5815E-04 -1.2690E-05 7.1486E-05 S13 -6.3749E-03 2.7836E-03 -3.5646E-03 1.8450E-04 -1.2260E-03 -1.7703E-04 -2.9052E-04 S14 -1.0004E-02 2.9484E-03 -3.2211E-03 2.1009E-03 -8.8433E-04 4.1132E-04 -2.2174E-04 S15 -1.7774E-03 -1.6120E-03 1.0894E-03 6.8948E-04 -1.7846E-03 8.4284E-04 -4.5835E-04 S16 1.1073E-02 -6.1120E-03 3.5119E-03 -2.0849E-03 9.3424E-04 -4.9910E-04 1.5862E-04

[0120] Table 4-2

[0121] Example 5

[0122] The following is for reference Figure 10 An imaging system according to Embodiment 5 of this application is described.

[0123] like Figure 10 As shown, in this embodiment, the imaging system includes a lens barrel P0 and a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, and an eighth lens E8 arranged sequentially along the optical axis from the object side to the image side, housed in the lens barrel P0. The imaging system also includes a plurality of support members: a first support member P1, located on the image side of the first lens E1 and in at least partial contact with the image side surface of the first lens E1; a second support member P2, located on the image side of the second lens E2 and in at least partial contact with the image side surface of the second lens E2; a third support member P3, located on the image side of the third lens E3 and in at least partial contact with the image side surface of the third lens E3; a fourth support member P4, located on the image side of the fourth lens E4 and in at least partial contact with the image side surface of the fourth lens E4; a fifth support member P5, located on the image side of the fifth lens E5 and in at least partial contact with the image side surface of the fifth lens E5; a sixth support member P6, located on the image side of the sixth lens E6 and in at least partial contact with the image side surface of the sixth lens E6; and a seventh support member P7, located on the image side of the seventh lens E7 and in at least partial contact with the image side surface of the seventh lens E7.

[0124] The structure of the imaging system in this embodiment is the same as that of the imaging system in embodiment 4. That is, the basic parameter table of the imaging system in this embodiment is the same as that in Table 3, and the table of higher-order coefficients of the aspherical mirror is the same as that in Tables 4-1 and 4-2.

[0125] The difference between this embodiment and embodiment 4 lies in the structural dimensions of the lens barrel and some of the supporting components, as well as the spacing of some of the supporting components along the optical axis. The values ​​of multiple parameters of the lens barrel and supporting components included in the imaging systems of this embodiment and embodiment 4 are shown in Table 7 below. The specific descriptions of these multiple parameters are the same as those in embodiment 2 above, and will not be repeated here.

[0126] Example 6

[0127] The following is for reference Figure 11 The optical lens according to Embodiment 6 of this application is described.

[0128] like Figure 11 As shown, in this embodiment, the imaging system includes a lens barrel P0 and a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, and an eighth lens E8 arranged sequentially along the optical axis from the object side to the image side, housed in the lens barrel P0. The imaging system also includes a plurality of support members: a first support member P1, located on the image side of the first lens E1 and in at least partial contact with the image side surface of the first lens E1; a second support member P2, located on the image side of the second lens E2 and in at least partial contact with the image side surface of the second lens E2; a third support member P3, located on the image side of the third lens E3 and in at least partial contact with the image side surface of the third lens E3; a fourth support member P4, located on the image side of the fourth lens E4 and in at least partial contact with the image side surface of the fourth lens E4; a fifth support member P5, located on the image side of the fifth lens E5 and in at least partial contact with the image side surface of the fifth lens E5; a sixth support member P6, located on the image side of the sixth lens E6 and in at least partial contact with the image side surface of the sixth lens E6; and a seventh support member P7, located on the image side of the seventh lens E7 and in at least partial contact with the image side surface of the seventh lens E7.

[0129] The structure of the imaging system in this embodiment is the same as that of the imaging system in embodiment 4. That is, the basic parameter table of the imaging system in this embodiment is the same as that in Table 3, and the table of higher-order coefficients of the aspherical mirror is the same as that in Tables 4-1 and 4-2.

[0130] The difference between this embodiment and embodiment 4 lies in the structural dimensions of the lens barrel and some of the supporting components, as well as the spacing of some of the supporting components along the optical axis. The values ​​of multiple parameters of the lens barrel and supporting components included in the imaging systems of this embodiment and embodiment 4 are also shown in Table 7 below. The specific descriptions of these multiple parameters are the same as those in embodiment 2 above, and will not be repeated here.

[0131] Figure 12 The on-axis chromatic aberration curves of the imaging systems of Examples 4, 5 and 6 are shown, which represent the deviation of the convergence focal point of light of different wavelengths after passing through the lens. Figure 13 Astigmatism curves of the imaging systems of Examples 4, 5, and 6 are shown, representing meridional and sagittal image plane curvature. Figure 14 The distortion curves of the imaging systems of Examples 4, 5 and 6 are shown, representing the distortion magnitude values ​​corresponding to different image heights. Figure 15 The magnification chromatic aberration curves of the imaging systems of Examples 4, 5, and 6 are shown, representing the deviations in image height at different points on the imaging plane after light passes through the lens. According to... Figures 12 to 15 It can be seen that the imaging systems given in Examples 4, 5 and 6 can achieve good imaging quality.

[0132] Example 7

[0133] The following is for reference Figure 16 An imaging system according to Embodiment 7 of this application is described.

[0134] like Figure 16 As shown, in this embodiment, the imaging system includes a lens barrel P0 and a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, and an eighth lens E8 arranged sequentially along the optical axis from the object side to the image side, housed in the lens barrel P0.

[0135] In this embodiment, the imaging system further includes a plurality of support members: a first support member P1, located on the image side of the first lens E1 and at least partially in contact with the image side surface of the first lens E1; a second support member P2, located on the image side of the second lens E2 and at least partially in contact with the image side surface of the second lens E2; a third support member P3, located on the image side of the third lens E3 and at least partially in contact with the image side surface of the third lens E3; a fourth support member P4, located on the image side of the fourth lens E4 and at least partially in contact with the image side surface of the fourth lens E4; a fifth support member P5, located on the image side of the fifth lens E5 and at least partially in contact with the image side surface of the fifth lens E5; a sixth support member P6, located on the image side of the sixth lens E6 and at least partially in contact with the image side surface of the sixth lens E6; and a seventh support member P7, located on the image side of the seventh lens E7 and at least partially in contact with the image side surface of the seventh lens E7.

[0136] In this embodiment, the first lens E1 has positive optical power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative optical power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens E3 has negative optical power, with its object-side surface S5 being convex and its image-side surface S6 being concave. The fourth lens E4 has positive optical power, with its object-side surface S7 being convex and its image-side surface S8 being convex. The fifth lens E5 has negative optical power, with its object-side surface S9 being concave and its image-side surface S10 being convex. The sixth lens E6 has negative optical power, with its object-side surface S11 being concave and its image-side surface S12 being convex. The seventh lens E7 has positive optical power, with its object-side surface S13 being convex and its image-side surface S14 being convex. The eighth lens E8 has negative optical power, with its object-side surface S15 being convex and its image-side surface S16 being concave.

[0137] Table 5 shows the basic parameters of the imaging system of Example 7, where the units for radius of curvature and thickness / distance are millimeters (mm).

[0138]

[0139] Table 5

[0140] In this embodiment, the object-side surface and image-side surface of any one of the first lens E1 to the eighth lens E8 are aspherical surfaces. The shape of each aspherical surface can be defined by formula (1) given in embodiment 1 above. Tables 6-1 and 6-2 show the higher-order coefficients A4, A6, A8, and A6 that can be used for each aspherical mirror surface S1 to S16 in this embodiment. 10 A 12 A 14 A 16 A 18 A 20 A 22 A 24 A 26 A 28 and A 30 .

[0141] Face number A4 A6 A8 A10 A12 A14 A16 S1 1.4776E-01 -8.8567E-03 -5.8196E-03 -8.0307E-03 -1.4252E-03 -1.4395E-03 3.3548E-04 S2 -1.0545E-01 1.1156E-02 -1.7266E-02 5.4856E-03 -3.0401E-03 1.5931E-03 -9.6952E-04 S3 -2.3421E-01 5.3752E-02 -1.3873E-03 7.4821E-03 -1.2066E-03 1.3349E-03 -5.9026E-04 S4 -1.1029E-01 2.0116E-02 5.6097E-03 2.9101E-03 1.2993E-03 7.2117E-04 3.6382E-04 S5 -2.0010E-01 -1.1690E-02 -4.4895E-04 1.9891E-04 2.4841E-04 1.3378E-04 3.4352E-05 S6 -1.9275E-01 1.1407E-02 4.7063E-03 7.9558E-04 1.3245E-03 5.1889E-04 4.2572E-05 S7 -1.4720E-01 -1.8427E-03 -9.0810E-04 -4.3450E-04 1.9428E-03 1.1233E-03 2.2732E-04 S8 -3.2768E-01 -1.6231E-02 -1.6109E-03 -1.9698E-03 1.3571E-03 5.8892E-04 7.9391E-05 S9 -5.1511E-01 8.3215E-02 1.7100E-02 -3.3017E-03 9.7629E-04 1.5456E-03 -1.6811E-03 S10 -5.1777E-01 -2.3766E-02 1.0101E-02 1.1341E-02 -7.4615E-03 5.2575E-03 -2.1266E-03 S11 2.3791E-01 -1.2575E-01 -9.8247E-02 -1.3317E-02 3.0115E-02 1.3970E-02 1.2453E-02 S12 -2.3399E-01 2.2369E-01 -6.0187E-02 3.3457E-02 -1.6322E-02 2.4725E-03 -2.6020E-04 S13 -5.1360E-01 -4.3635E-01 2.7165E-01 -9.4946E-02 2.9428E-02 -2.8498E-02 1.8495E-02 S14 1.1796E+00 -6.4678E-01 4.2346E-01 -2.1469E-01 7.5497E-02 -3.8708E-02 2.7420E-02 S15 -4.7602E+00 1.3574E+00 -4.3210E-01 1.1763E-01 -2.0208E-02 -5.2161E-03 7.5706E-03 S16 -8.5408E+00 1.8757E+00 -6.2363E-01 2.6800E-01 -1.1665E-01 4.9481E-02 -2.2966E-02

[0142] Table 6-1

[0143]

[0144]

[0145] Table 6-2

[0146] Example 8

[0147] The following is for reference Figure 17 An imaging system according to Embodiment 8 of this application is described.

[0148] like Figure 17 As shown, in this embodiment, the imaging system includes a lens barrel P0 and a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, and an eighth lens E8 arranged sequentially along the optical axis from the object side to the image side, housed in the lens barrel P0. The imaging system also includes a plurality of support members: a first support member P1, located on the image side of the first lens E1 and in at least partial contact with the image side surface of the first lens E1; a second support member P2, located on the image side of the second lens E2 and in at least partial contact with the image side surface of the second lens E2; a third support member P3, located on the image side of the third lens E3 and in at least partial contact with the image side surface of the third lens E3; a fourth support member P4, located on the image side of the fourth lens E4 and in at least partial contact with the image side surface of the fourth lens E4; a fifth support member P5, located on the image side of the fifth lens E5 and in at least partial contact with the image side surface of the fifth lens E5; a sixth support member P6, located on the image side of the sixth lens E6 and in at least partial contact with the image side surface of the sixth lens E6; and a seventh support member P7, located on the image side of the seventh lens E7 and in at least partial contact with the image side surface of the seventh lens E7.

[0149] The structure of the imaging system in this embodiment is the same as that of the imaging system in embodiment 7. That is, the basic parameter table of the imaging system in this embodiment is the same as that in Table 5, and the table of higher-order coefficients of the aspherical mirror is the same as that in Tables 6-1 and 6-2.

[0150] The difference between this embodiment and Embodiment 7 lies in the structural dimensions of the lens barrel and some of the supporting components, as well as the spacing of some of the supporting components along the optical axis. The values ​​of multiple parameters of the lens barrel and supporting components included in the imaging systems of this embodiment and Embodiment 7 are also shown in Table 7 below. The specific descriptions of these multiple parameters are the same as those described in Embodiment 2 above, and will not be repeated here.

[0151] Example 9

[0152] The following is for reference Figure 18 The optical lens according to Embodiment 9 of this application is described.

[0153] like Figure 18As shown, in this embodiment, the imaging system includes a lens barrel P0 and a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, and an eighth lens E8 arranged sequentially along the optical axis from the object side to the image side, housed in the lens barrel P0. The imaging system also includes a plurality of support members: a first support member P1, located on the image side of the first lens E1 and in at least partial contact with the image side surface of the first lens E1; a second support member P2, located on the image side of the second lens E2 and in at least partial contact with the image side surface of the second lens E2; a third support member P3, located on the image side of the third lens E3 and in at least partial contact with the image side surface of the third lens E3; a fourth support member P4, located on the image side of the fourth lens E4 and in at least partial contact with the image side surface of the fourth lens E4; a fifth support member P5, located on the image side of the fifth lens E5 and in at least partial contact with the image side surface of the fifth lens E5; a sixth support member P6, located on the image side of the sixth lens E6 and in at least partial contact with the image side surface of the sixth lens E6; and a seventh support member P7, located on the image side of the seventh lens E7 and in at least partial contact with the image side surface of the seventh lens E7.

[0154] The structure of the imaging system in this embodiment is the same as that of the imaging system in embodiment 7. That is, the basic parameter table of the imaging system in this embodiment is the same as that in Table 5, and the table of higher-order coefficients of the aspherical mirror is the same as that in Tables 6-1 and 6-2.

[0155] The difference between this embodiment and Embodiment 7 lies in the structural dimensions of the lens barrel and some of the supporting components, as well as the spacing of some of the supporting components along the optical axis. The values ​​of multiple parameters of the lens barrel and supporting components included in the imaging systems of this embodiment and Embodiment 7 are also shown in Table 7 below. The specific descriptions of these multiple parameters are the same as those described in Embodiment 2 above, and will not be repeated here.

[0156] Figure 19 The on-axis chromatic aberration curves of the imaging systems of Embodiments 7, 8 and 9 are shown, which represent the deviation of light of different wavelengths from the convergence focal point after passing through the lens. Figure 20 Astigmatism curves of the imaging systems of Examples 7, 8, and 9 are shown, representing meridional and sagittal image plane curvature. Figure 21 The distortion curves of the imaging systems of Examples 7, 8 and 9 are shown, representing the distortion magnitude values ​​corresponding to different image heights. Figure 22 The magnification chromatic aberration curves of the imaging systems of Examples 7, 8, and 9 are shown, representing the deviations in image height at different points on the imaging plane after light passes through the lens. According to... Figures 19 to 22 It can be seen that the imaging systems given in Examples 7, 8 and 9 can achieve good imaging quality.

[0157] Parameters / Examples 1 2 3 4 5 6 7 8 9 d1s 4.2715 4.3858 4.2394 4.4343 4.3255 4.1330 4.2702 4.4582 3.9409 d2s 3.4772 3.5523 3.4320 3.3802 3.1869 3.0053 3.3922 3.2069 3.3559 d3s 3.6178 3.6989 3.5762 3.4401 3.2702 3.3339 3.5076 3.3570 3.1716 d3m 3.6178 3.6989 3.5762 3.4401 3.2702 3.3339 3.5076 3.3570 3.1716 D3s 6.4942 5.5452 6.4413 6.6473 5.2316 5.7238 7.0135 5.5117 5.8889 D3m 6.4942 5.5452 6.4413 6.6473 5.2316 5.7238 7.0135 5.5117 5.8889 d4s 4.0120 3.9560 3.8125 3.7725 3.4822 3.7539 3.8563 3.8152 3.6065 d5s 4.5427 4.7197 4.4994 4.4450 4.7548 4.2017 4.4291 4.4784 4.2055 D5m 7.1277 5.9460 7.7304 6.8473 7.2165 7.3395 7.2135 5.7218 7.5907 D6s 7.4425 7.6797 7.8809 6.6896 7.0588 8.5010 6.8901 6.8901 8.7601 D6m 7.6365 7.8737 7.8809 8.0700 8.8050 8.5010 7.9736 8.6227 8.7601 d7s 6.9170 6.8000 7.6529 6.7341 6.4190 6.4326 6.7170 6.5297 7.3783 d7m 8.0110 7.7219 7.6529 6.7341 6.4190 6.4326 8.0862 8.4336 7.3783 D7m 8.9559 9.2669 10.7801 11.0460 11.6760 11.5913 10.8679 10.3798 11.0848 d0s 6.0079 6.1847 6.9016 6.0526 6.3101 6.2562 6.0471 6.3250 6.7629 d0m 11.2589 11.4329 11.0973 11.7766 12.4490 12.0748 11.6755 11.1874 11.9458 D0s 7.3588 8.2705 8.4318 7.5039 9.2846 9.3528 8.2122 8.1162 9.0085 D0m 12.6078 12.5839 12.1656 12.9143 13.6649 12.8344 13.5737 12.3837 12.4902 EP01 1.5593 1.6781 1.7271 1.4931 1.6993 1.8053 1.4843 1.8227 1.7691 CP3 0.0160 0.0170 0.0180 0.0220 0.0240 0.0230 0.0300 0.0330 0.0360 CP4 0.0160 0.0170 0.0180 0.0220 0.0240 0.0230 0.0300 0.0330 0.0360 EP45 0.6701 0.5459 0.5745 0.8376 0.6883 0.8290 0.6412 0.5067 0.6916 EP56 0.5157 0.5741 0.8168 0.3202 0.3772 0.8973 0.4655 0.6083 0.8300 CP6 0.4048 0.3526 0.0160 0.6011 0.5353 0.0230 0.4446 0.4004 0.0350 EP67 0.3991 0.5018 0.9242 0.7178 0.7837 0.6615 0.4081 0.4634 0.7648 CP7 0.3799 0.3294 0.0160 0.0220 0.0240 0.0230 0.4440 0.3887 0.0350 L 7.2460 7.6484 7.3972 7.6035 7.8575 7.8043 7.4952 7.7694 7.8043

[0158] Table 7

[0159] Furthermore, in Examples 1 to 9, the Semi-FOV (half of the maximum field of view of the imaging system), the entrance pupil diameter EPD of the imaging system, the effective focal length f of the imaging system, the effective focal length values ​​f1 to f8 of each lens, and the distance TD on the optical axis from the object side of the first lens to the image side of the eighth lens are shown in Table 8 below.

[0160] Parameters / Examples 1 2 3 4 5 6 7 8 9 Semi-FOV (°) 40.9758 40.9758 40.9758 38.6269 38.6269 38.6269 40.1741 40.1741 40.1741 EPD 4.5532 4.5532 4.5532 4.4544 4.4544 4.4544 4.4920 4.4920 4.4920 f(mm) 6.4654 6.4654 6.4654 6.3250 6.3250 6.3250 6.3785 6.3785 6.3785 f1(mm) 10.5496 10.5496 10.5496 9.9849 9.9849 9.9849 10.5513 10.5513 10.5513 f2 (mm) -25.3689 -25.3689 -25.3689 -27.9299 -27.9299 -27.9299 -26.5151 -26.5151 -26.5151 f3 (mm) -1223.4049 -1223.4049 -1223.4049 -74.6443 -74.6443 -74.6443 -509.6915 -509.6915 -509.6915 f4 (mm) 11.1315 11.1315 11.1315 10.0963 10.0963 10.0963 11.0172 11.0172 11.0172 f5 (mm) -25.6703 -25.6703 -25.6703 -23.2298 -23.2298 -23.2298 -24.7748 -24.7748 -24.7748 f6 (mm) -260.1246 -260.1246 -260.1246 -92.4120 -92.4120 -92.4120 -215.5540 -215.5540 -215.5540 f7 (mm) 6.8358 6.8358 6.8358 7.5855 7.5855 7.5855 6.8434 6.8434 6.8434 f8(mm) -9.8812 -9.8812 -9.8812 -12.4754 -12.4754 -12.4754 -10.1359 -10.1359 -10.1359 TD(mm) 6.5912 6.5912 6.5912 6.8726 6.8726 6.8726 6.6257 6.6257 6.6257

[0161] Table 8 shows that Examples 1 to 9 satisfy the conditions shown in Table 9 below.

[0162] Conditional / Example 1 2 3 4 5 6 7 8 9 f / EPD 1.4200 1.4200 1.4200 1.4200 1.4200 1.4200 1.4200 1.4200 1.4200 (V7+V8) / V6 4.7469 4.7469 4.7469 4.7469 4.7469 4.7469 4.7469 4.7469 4.7469 (D0s+D0m)×EPD / f5 -3.5415 -3.6990 -3.6534 -3.9153 -4.4006 -4.2545 -3.9501 -3.7169 -3.8980 (D3m+D6s) / (f3-f6) -0.0145 -0.0137 -0.0149 0.7506 0.6917 0.8006 -0.0473 -0.0422 -0.0498 tan(Semi-FOV)×f / L 0.7750 0.7342 0.7591 0.6647 0.6432 0.6476 0.7185 0.6931 0.6900 TD / (d0m-d0s) 1.2552 1.2559 1.5710 1.2007 1.1195 1.1812 1.1772 1.3626 1.2784 (d7s+D7m) / ∣f7+f8∣ 5.2121 5.2758 6.0527 3.6361 3.7005 3.6859 5.3409 5.1358 5.6076 (R13-R16) / (CP7+T78+CT8) 11.9459 12.4604 17.0077 15.1252 15.0943 15.1097 11.2292 11.7242 16.3260 (d7s+d7m) / (R14+R15) -5.8193 -5.6610 -5.9666 -3.9557 -3.7706 -3.7786 -5.7223 -5.7842 -5.7043 (T45+T56) / (CP4+CP6) 1.6067 1.8292 19.8845 1.4681 1.6356 19.8854 1.4584 1.5972 9.7491 f4 / d4s 2.7745 2.8139 2.9198 2.6763 2.8994 2.6896 2.8569 2.8877 3.0548 f7 / d7s 0.9883 1.0053 0.8932 1.1264 1.1817 1.1792 1.0188 1.0480 0.9275 (d5s+D5m) / ∣R8-R9∣ 15.3543 14.0325 16.0903 12.3801 13.1245 12.6530 14.4746 12.6813 14.6655 (d3m×D3s) / (f3×CP3) -1.2003 -0.9862 -1.0460 -13.9250 -9.5499 -11.1151 -1.6089 -1.1001 -1.0179 (EP45-EP56) / (R8-R9) -0.2032 0.0371 0.3187 -0.5672 -0.3411 0.0749 -0.2185 0.1263 0.1721 f2×(V2-V3) / d2s -8.2806 -8.1057 -8.3898 -9.3782 -9.9471 -10.5480 -8.8718 -9.3844 -8.9676 TD / EP01+TD / L 5.1366 4.7895 4.7074 5.5066 4.9190 4.6875 5.3477 4.4880 4.5943 d1s / d2s 1.2284 1.2347 1.2353 1.3118 1.3573 1.3752 1.2589 1.3902 1.1743 d1s / d3s 1.1807 1.1857 1.1854 1.2890 1.3227 1.2397 1.2174 1.3280 1.2425 d1s / d4s 1.0647 1.1087 1.1120 1.1754 1.2421 1.1010 1.1073 1.1685 1.0927 f6×EP67 / D6m / SAG62 16.7204 20.3885 37.5142 9.2761 9.2813 8.1150 13.4518 14.1255 22.9443 (SAG51+SAG52) / EP56 -2.7139 -2.4376 -1.7134 -4.3396 -3.6844 -1.5487 -3.0426 -2.3283 -1.7063

[0163] Table 9

[0164] This application also provides an imaging device equipped with an electronic photosensitive element for imaging. The electronic photosensitive element can be a charge-coupled device (CCD) or a complementary metal-oxide-semiconductor (CMOS) device. The imaging device can be a standalone imaging device such as a digital camera, or an imaging module integrated into a mobile electronic device such as a mobile phone. This imaging device is equipped with the imaging system described above.

[0165] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of protection involved in this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the concept of this application. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. An imaging system, characterized in that, It includes a lens barrel, a lens assembly housed within the lens barrel, and multiple supporting members, wherein, The lens group includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens arranged sequentially along the optical axis from the object side to the image side; among the first lens to the eighth lens, the lens that satisfies an Abbe number greater than 30 has a product of the radius of curvature of its object side and the radius of curvature of its image side that is greater than zero. in, The first lens has positive optical power, and its object side is convex and its image side is concave. The second lens has negative optical power, with its object side being convex and its image side being concave. The third lens has negative optical power, and its object side is convex while its image side is concave. The fourth lens has positive optical power, and its object side is convex, as is its image side; The fifth lens has negative optical power, and its object side is concave while its image side is convex. The sixth lens has negative optical power, and its object side is concave while its image side is convex. The seventh lens has positive optical power, and its object side is convex, and its image side is convex. The eighth lens has negative optical power, and its object side is convex while its image side is concave. The imaging system has eight lenses with optical power. The plurality of supporting members include: a third supporting member located on the image side of the third lens and at least partially in contact with the image side surface of the third lens; a fourth supporting member located on the image side of the fourth lens and at least partially in contact with the image side surface of the fourth lens; a fifth supporting member located on the image side of the fifth lens and at least partially in contact with the image side surface of the fifth lens; a sixth supporting member located on the image side of the sixth lens and at least partially in contact with the image side surface of the sixth lens; and a seventh supporting member located on the image side of the seventh lens and at least partially in contact with the image side surface of the seventh lens. The imaging system satisfies: 1.4200≤f / EPD<1.8; 3.7 < (V7 + V8) / V6 ≤ 4.7469; and -4.4006mm≤(D0s+D0m)×EPD / f5≤-3.5415mm, Where f is the effective focal length of the imaging system, EPD is the entrance pupil diameter of the imaging system, V7 is the Abbe number of the seventh lens, V8 is the Abbe number of the eighth lens, V6 is the Abbe number of the sixth lens, D0s is the outer diameter of the object-side end face of the lens barrel, D0m is the outer diameter of the image-side end face of the lens barrel, and f5 is the effective focal length of the fifth lens.

2. The imaging system according to claim 1, characterized in that, The outer diameter D3m of the image side of the third support member, the outer diameter D6s of the object side of the sixth support member, the effective focal length f3 of the third lens, and the effective focal length f6 of the sixth lens satisfy the following: -0.0498≤(D3m+D6s) / (f3-f6) ≤0.8006.

3. The imaging system according to claim 1, characterized in that, The semi-FOV (half of the maximum field of view) of the imaging system, the effective focal length f of the imaging system, and the maximum height L of the lens barrel satisfy the following: 0.6432≤tan(Semi-FOV)×f / L≤0.7750.

4. The imaging system according to claim 1, characterized in that, The distance TD between the object-side surface of the first lens and the image-side surface of the eighth lens on the optical axis, 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 the following: 1.1195≤TD / (d0m-d0s) ≤1.5710.

5. The imaging system according to claim 1, characterized in that, The inner diameter d7s of the object side of the seventh support member, the outer diameter D7m of the image side of the seventh support member, the effective focal length f7 of the seventh lens, and the effective focal length f8 of the eighth lens satisfy the following: 3.6361≤(d7s+D7m) / ∣f7+f8∣≤6.0527.

6. The imaging system according to claim 1, characterized in that, The inner diameter d7s of the object side of the seventh support member, the inner diameter d7m of the image side of the seventh support member, the radius of curvature R14 of the image side of the seventh lens, the radius of curvature R15 of the object side of the eighth lens, the radius of curvature R13 of the object side of the seventh lens, the radius of curvature R16 of the image side of the eighth lens, the thickness CP7 of the seventh support member, the air gap T78 between the seventh and eighth lenses on the optical axis, and the center thickness CT8 of the eighth lens on the optical axis satisfy the following: -5.9666≤(d7s+d7m) / (R14+R15) ≤-3.7706 and 11.2292≤(R13-R16) / (CP7+T78+CT8) ≤17.0077.

7. The imaging system according to claim 1, characterized in that, The air gap T45 between the fourth and fifth lenses on the optical axis, the air gap T56 between the fifth and sixth lenses on the optical axis, and the thickness CP4 and CP6 of the fourth and sixth support members satisfy the following: 1.4584≤(T45+T56) / (CP4+CP6) ≤19.8854.

8. The imaging system according to claim 1, characterized in that, The inner diameter d5s of the object-side surface of the fifth support member, the outer diameter D5m of the image-side surface of the fifth support member, the radius of curvature R8 of the image-side surface of the fourth lens, and the radius of curvature R9 of the object-side surface of the fifth lens satisfy the following: 12.3801≤(d5s+D5m) / ∣R8-R9∣≤16.0903.

9. The imaging system according to claim 1, characterized in that, The inner diameter d3m of the image side of the third support member, the outer diameter D3s of the object side of the third support member, the effective focal length f3 of the third lens, and the thickness CP3 of the third support member satisfy the following: -13.9250≤(d3m×D3s) / (f3×CP3) ≤-0.9862.

10. The imaging system according to any one of claims 1 to 9, characterized in that, The distance EP45 between the image-side surface of the fourth support member and the object-side surface of the fifth support member on the optical axis, the distance EP56 between the image-side surface of the fifth support member and the object-side surface of the sixth support member on the optical axis, and the radius of curvature R8 of the image-side surface of the fourth lens and the radius of curvature R9 of the object-side surface of the fifth lens satisfy the following: -0.5672≤(EP45-EP56) / (R8-R9) ≤0.3187.

11. The imaging system according to any one of claims 1 to 9, characterized in that, The plurality of supporting members further includes: a second supporting member located on the image side of the second lens and in at least partial contact with the image side surface of the second lens; The effective focal length f2 of the second lens, the Abbe number V2 of the second lens, the Abbe number V3 of the third lens, and the inner diameter d2s of the object side surface of the second support member satisfy: -10.5480 ≤ f2×(V2 - V3) / d2s ≤ -8.1057.

12. The imaging system according to any one of claims 1 to 9, characterized in that, The plurality of support members further includes: a first support member, located on the image side of the first lens, and at least partially contacting the image side surface of the first lens; The distance TD on the optical axis from the object side surface of the first lens to the image side surface of the eighth lens, the distance EP01 on the optical axis from the object side end surface of the lens barrel to the object side surface of the first support member, and the maximum height L of the lens barrel satisfy: 4.4880 ≤ TD / EP01 + TD / L ≤ 5.5066.

13. The imaging system according to any one of claims 1 to 9, characterized in that, The plurality of support members further includes: a first support member, located on the image side of the first lens, and at least partially contacting the image side surface of the first lens; and a second support member, located on the image side of the second lens, and at least partially contacting the image side surface of the second lens; The inner diameter d1s of the object side surface of the first support member and the inner diameter djs of the object side surface of the j-th support member satisfy: 1 < d1s / djs < 3, where j = 2, 3, or 4.

14. The imaging system according to any one of claims 1 to 9, characterized in that, The effective focal length f6 of the sixth lens, the distance EP67 on the optical axis from the image side surface of the sixth support member to the object side surface of the seventh support member, the outer diameter D6m of the image side surface of the sixth support member, and the distance SAG62 on the optical axis from the intersection point of the image side surface of the sixth lens and the optical axis to the maximum effective semi-aperture position on the image side surface of the sixth lens satisfy: 8.1150 ≤ f6×EP67 / D6m / SAG62 ≤ 37.5142.

15. The imaging system according to any one of claims 1 to 9, characterized in that, The distance SAG51 on the optical axis from the intersection point of the object side surface of the fifth lens and the optical axis to the maximum effective semi-aperture position on the object side surface of the fifth lens, the distance SAG52 on the optical axis from the intersection point of the image side surface of the fifth lens and the optical axis to the maximum effective semi-aperture position on the image side surface of the fifth lens, and the distance EP56 on the optical axis from the image side surface of the fifth support member to the object side surface of the sixth support member satisfy: -4.3396 ≤ (SAG51 + SAG52) / EP56 ≤ -1.5487.

16. The imaging system according to any one of claims 1 to 9, characterized in that, The radius of curvature R of the image-side surface of the i-th lens in the lens group n The radius of curvature R of the object-side surface of the i-th lens n-1 The effective focal length fi of the i-th lens and the inner diameter dis of the object side of the i-th bearing member satisfy the following: When R n / R n-1 < 0, 0 < fi / dis < 6, where i = 1, 2, 3, 4, 5, 6 or 7 and i = n / 2.

Images