Optical imaging system

Abstract

An optical imaging system includes, in order from the object side, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, and a ninth lens, wherein the first lens and the second lens each have positive refractive power, and satisfies 15 < v7 - v8 < 25, wherein v7 represents the Abbe number of the seventh lens, and v8 represents the Abbe number of the eighth lens.

Description

[0008] , , , ,

[0011] , ,

[0010] ,

[0009] , , ,

[0007] , ,

[0006] , ,

[0005] Cross - reference to related applications

[0002] This application claims the priority benefit of Korean Patent Application No. 10 - 2021 - 0181062, filed on December 16, 2021, with the Korean Intellectual Property Office, the entire disclosure of which is incorporated herein by reference for all purposes. Technical Field

[0003] This disclosure relates to an optical imaging system. Background Art

[0004] A portable terminal may be equipped with a camera module including an optical imaging system for video calls and image capture, the optical imaging system including a plurality of lenses.

[0005] As camera modules in portable terminals gradually integrate more and more functions, the demand for camera modules for mobile terminals with high resolution is increasing.

[0006] In addition, as portable terminals become smaller, camera modules for portable terminals also need to be thinner, so there is a need to develop an optical imaging system that can achieve high resolution while being thin.

[0007] The above information is presented only as background information to assist in understanding this disclosure. No determination has been made, and no assertion is made as to whether any of the above constitutes prior art with respect to this disclosure. Summary of the Invention

[0008] The Summary of the Invention section is intended to introduce, in a brief form, selections of inventive concepts, which will be further described in the Detailed Description section below. The Summary of the Invention section is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used to help determine the scope of the claimed subject matter.

[0009] In one general aspect, an optical imaging system includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, and a ninth lens arranged in order from the object side, wherein the first lens and the second lens each have a positive refractive power, and wherein 15 < v7 - v8 < 25 is satisfied, where v7 represents the Abbe number of the seventh lens, and v8 represents the Abbe number of the eighth lens.

[0010] 25 < v1 - v3 < 45 may be satisfied, where v1 represents the Abbe number of the first lens, and v3 represents the Abbe number of the third lens.

[0011] It can satisfy at least one of 25 < v1 - v5 < 45 and 15 < v1 - v6 < 25, where v5 represents the Abbe number of the fifth lens, and v6 represents the Abbe number of the sixth lens.

[0012] It can satisfy |f1 / f2| < 1.0, where f1 represents the focal length of the first lens, and f2 represents the focal length of the second lens.

[0013] It can satisfy 0 < f1 / f < 1.4 and 5 < f2 / f < 50, where f represents the total focal length of the optical imaging system.

[0014] It can satisfy -5 < f3 / f < 0, where f3 represents the focal length of the third lens.

[0015] It can satisfy -2.0 < f2 / f3 < 0.

[0016] It can satisfy at least one of |f4 / f| > 50.0, -25 < f5 / f < 0, |f6 / f| > 2.0, and f7 / f < 5.0, where f4 represents the focal length of the fourth lens, f5 represents the focal length of the fifth lens, f6 represents the focal length of the sixth lens, and f7 represents the focal length of the seventh lens.

[0017] It can satisfy D1 / f < 0.1, where f represents the total focal length of the optical imaging system, and D1 represents the distance on the optical axis between the image side of the first lens and the object side of the second lens.

[0018] It can satisfy D7 / f < 0.1, where f represents the total focal length of the optical imaging system, and D7 represents the distance on the optical axis between the image side of the seventh lens and the object side of the eighth lens.

[0019] It can satisfy TTL / f < 1.2 and BFL / f < 0.3, where TTL represents the distance on the optical axis from the object side of the first lens to the imaging surface, and BFL represents the distance on the optical axis from the image side of the ninth lens to the imaging surface.

[0020] It can satisfy D6 - D1 - D2 > 0.2 mm, where D1 represents the distance on the optical axis between the image side of the first lens and the object side of the second lens, D2 represents the distance on the optical axis between the image side of the second lens and the object side of the third lens, and D6 represents the distance on the optical axis between the image side of the sixth lens and the object side of the seventh lens.

[0021] It can satisfy SA11 / CT1 > 40° / mm, where SA11 represents the grazing angle at the end of the effective diameter of the first lens on its object side, and CT1 represents the thickness of the first lens on the optical axis.

[0022] It can satisfy SA92 / CT9 > 50° / mm, where SA92 represents the grazing angle at the end of the effective diameter of the ninth lens on its image side, and CT9 represents the thickness of the ninth lens on the optical axis.

[0023] It can satisfy SAG11 / CT1 > 0.7, where SAG11 represents the SAG value at the end of the effective diameter of the first lens on its object side, and CT1 represents the thickness of the first lens on the optical axis.

[0024] The third lens can have a negative refractive power, and the fourth lens can have a positive refractive power or a negative refractive power, and it can satisfy |f3| < |f4|, where f3 represents the focal length of the third lens, and f4 represents the focal length of the fourth lens.

[0025] The third lens can have a negative refractive power, the fourth lens can have a positive refractive power or a negative refractive power, the fifth lens can have a negative refractive power, the sixth lens can have a positive refractive power, the seventh lens can have a positive refractive power, the eighth lens can have a positive refractive power or a negative refractive power, and the ninth lens can have a negative refractive power.

[0026] In another general aspect, an optical imaging system includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, and a ninth lens arranged in order from the object side, where the first lens and the second lens each have a positive refractive power, the seventh lens has an Abbe number different from that of the eighth lens, and it satisfies 0.5 < L7S2 / L8S1 < 1.2, where L7S2 represents the radius of curvature of the image side of the seventh lens, and L8S1 represents the radius of curvature of the object side of the eighth lens.

[0027] The image side of the seventh lens and the object side of the eighth lens can each have at least one inflection point in a region other than their paraxial regions.

[0028] The third lens can have a negative refractive power, and it can satisfy |f3| < |f4|, 25 < v1 - v3 < 45, and 15 < v7 - v8 < 25, where v1 represents the Abbe number of the first lens, v3 represents the Abbe number of the third lens, v7 represents the Abbe number of the seventh lens, v8 represents the Abbe number of the eighth lens, f3 represents the focal length of the third lens, and f4 represents the focal length of the fourth lens.

[0029] In another general aspect, an optical imaging system includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, and a ninth lens arranged in order from the object side, where the sixth lens and the seventh lens each have a positive refractive power, a convex object side, and a concave image side.

[0030] The fourth lens may have a concave object side and a convex image side, and the eighth lens may have a convex object side and a concave image side.

[0031] The first lens and the second lens may each have a positive refractive power, and the third lens, the fifth lens, and the ninth lens may each have a negative refractive power.

[0032] It may be satisfied that 15 < v7 - v8 < 25, where v7 represents the Abbe number of the seventh lens, and v8 represents the Abbe number of the eighth lens.

[0033] The seventh lens may have an Abbe number different from that of the eighth lens and may satisfy 0.5 < L7S2 / L8S1 < 1.2, where L7S2 represents the radius of curvature of the image side of the seventh lens, and L8S1 represents the radius of curvature of the object side of the eighth lens.

[0034] One or more of |f3| < |f4|, 25 < v1 - v5 < 45, and 15 < v1 - v6 < 25 are satisfied, where f3 represents the focal length of the third lens, f4 represents the focal length of the fourth lens, v1 represents the Abbe number of the first lens, v5 represents the Abbe number of the fifth lens, and v6 represents the Abbe number of the sixth lens.

[0035] Other features and aspects will be apparent from the accompanying drawings, the claims, and the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 is a diagram of an optical imaging system according to a first exemplary embodiment of the present disclosure.

[0037] Figure 2 shows having a representation Figure 1 a graph showing curves of aberration characteristics of the optical imaging system shown in <00000​​​​​​​​​​​​​​​​​​​​​​This is a diagram of an optical imaging system according to a fourth exemplary embodiment of the present disclosure.

[0043] Figure 8 It shows a representation Figure 7 The graph shows the aberration characteristics of the optical imaging system.

[0044] Figure 9 This is a diagram of an optical imaging system according to a fifth exemplary embodiment of the present disclosure.

[0045] Figure 10 It shows a representation Figure 9 The graph shows the aberration characteristics of the optical imaging system.

[0046] Figure 11 This is a diagram of an optical imaging system according to a sixth exemplary embodiment of the present disclosure.

[0047] Figure 12 It shows a representation Figure 11 The graph shows the aberration characteristics of the optical imaging system.

[0048] Figure 13 This is a diagram of an optical imaging system according to a seventh exemplary embodiment of the present disclosure.

[0049] Figure 14 It shows a representation Figure 13 The graph shows the aberration characteristics of the optical imaging system.

[0050] Figure 15 It is a diagram showing the sweep angle at a specific location on the lens surface.

[0051] Throughout all the accompanying drawings and detailed descriptions, the same reference numerals refer to the same elements. For purposes of clarity, illustration, and convenience, the drawings may not be drawn to scale, and the relative dimensions, scale, and depiction of elements in the drawings may be exaggerated. Detailed Implementation

[0052] In the following, although exemplary embodiments of the present disclosure are described in detail with reference to the accompanying drawings, it should be noted that the examples are not limited thereto.

[0053] The following detailed description is provided to assist the reader in gaining a full understanding of the methods, apparatus, and / or systems described herein. However, various changes, modifications, and equivalents of the methods, apparatus, and / or systems described herein will be apparent upon understanding this disclosure. For example, the order of operations described herein is merely illustrative and is not limited to the order set forth herein, except for operations that must occur in a specific order, and changes may be made that will become apparent upon understanding this disclosure. Furthermore, for clarity and conciseness, descriptions of features known in the art may be omitted.

[0054] The features described herein may be implemented in different forms and should not be construed as limited to the examples described herein. Rather, the examples described herein are provided merely to illustrate some of the many feasible ways of implementing the methods, apparatus, and / or systems described herein, which will be apparent upon understanding this disclosure.

[0055] Throughout the entire specification, when an element such as a layer, region, or substrate is described as being "on," "connected to," or "attached to" another element, it may be directly "on," directly "connected to," or directly "attached to" that other element, or there may be one or more other elements in between. Conversely, when an element is described as being "directly" "on," directly "connected to," or directly "attached to" another element, there cannot be other elements in between.

[0056] As used herein, the term “and / or” includes any one and any combination of any two or more of the relevant listed items. Similarly, “at least one of…” includes any one and any combination of any two or more of the relevant listed items.

[0057] Although terms such as “first,” “second,” and “third” may be used herein to describe various components, parts, regions, layers, or sections, these components, parts, regions, layers, or sections are not limited by these terms. Rather, these terms are used only to distinguish one component, part, region, layer, or section from another. Therefore, without departing from the teachings of the examples described herein, the first component, first part, first region, first layer, or first section mentioned in the examples may also be referred to as a second component, second part, second region, second layer, or second section.

[0058] Spatial relative terms such as “above,” “above,” “below,” and “below” may be used herein for descriptive convenience to describe the relationship of one element relative to another, as shown in the accompanying drawings. In addition to covering the orientation depicted in the drawings, these spatial relative terms are intended to also cover different orientations of the device in use or operation. For example, if the device in the drawings is flipped, an element described as being “above” or “above” another element would be located “below” or “below” that other element. Thus, depending on the spatial orientation of the device, the term “above” covers both “above” and “below” orientations. The device may also be oriented in other ways (rotated 90 degrees or in other orientations), and the spatial relative terms used herein should be interpreted accordingly.

[0059] The terminology used herein is for the purpose of describing various examples only and is not intended to limit this disclosure. Unless the context clearly indicates otherwise, the articles “a,” “an,” and “the” are intended to include the plural form as well. The terms “comprising,” “including,” and “having” indicate the presence of stated features, numbers, operations, components, elements, and / or combinations thereof, but do not preclude the presence or addition of one or more other features, numbers, operations, components, elements, and / or combinations thereof.

[0060] The shapes shown in the accompanying drawings may vary due to manufacturing techniques and / or tolerances. Therefore, the examples described herein are not limited to the specific shapes shown in the accompanying drawings, but include shape variations that occur during manufacturing.

[0061] In this document, it should be noted that the term “may” is used for examples. For example, “an example may include or implement what” means that there exists at least one example that includes or implements this feature, but not all examples are limited to this.

[0062] As will become apparent upon understanding this disclosure, the features of the examples described herein can be combined in various ways. Furthermore, although the examples described herein have multiple configurations, other configurations are also possible upon understanding this disclosure.

[0063] The aspects disclosed herein can provide an optical imaging system with high resolution.

[0064] In the accompanying drawings, for ease of illustration, the thickness, size, and shape of the lenses have been slightly exaggerated. For example, the shapes of spherical or aspherical surfaces shown in the drawings are merely illustrative. That is, the shapes of spherical or aspherical surfaces are not limited to those shown in the drawings.

[0065] An optical imaging system according to an exemplary embodiment of this disclosure may include nine lenses.

[0066] The first lens can refer to the lens arranged closest to the object side, and the ninth lens can refer to the lens arranged closest to the imaging plane (or image sensor).

[0067] Furthermore, the first surface of each lens can represent its surface closest to the object side (or object-side surface), and the second surface of each lens can represent its surface closest to the image side (or image-side surface). Additionally, all values ​​for the lens's radius of curvature, thickness, distance, focal length, etc., can be expressed in millimeters (mm), and the field of view (FOV) can be expressed in degrees.

[0068] Furthermore, in the description of the shape of each lens, a convex shape on one surface of the lens can indicate that the paraxial region of the corresponding surface is convex, and a concave shape on one surface of the lens can indicate that the paraxial region of the corresponding surface is concave.

[0069] Therefore, although one surface of the lens is described as convex, the edge portion of the lens may be concave. Similarly, although one surface of the lens is described as concave, the edge portion of the lens may be convex.

[0070] The paraxial region can be defined as a very narrow region near and including the optical axis.

[0071] An imaging plane can be represented as a virtual plane in which an optical imaging system forms a focal point. Alternatively, an imaging plane can be represented as a surface of an image sensor on which light is received.

[0072] An optical imaging system according to an exemplary embodiment of this disclosure may include nine lenses.

[0073] For example, an optical imaging system according to an exemplary embodiment of this disclosure may include a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, and a ninth lens arranged sequentially from the object side. The first to ninth lenses may be arranged to be spaced apart from each other by a predetermined distance along the optical axis.

[0074] An optical imaging system according to an exemplary embodiment of this disclosure may further include an image sensor for converting an image of an incident object into an electrical signal.

[0075] In addition, the optical imaging system may also include an infrared filter (hereinafter referred to as a filter) that blocks infrared light. The filter may be positioned between the ninth lens and the image sensor.

[0076] In addition, the optical imaging system may also include an aperture for adjusting the amount of light.

[0077] The first lens and the second lens can each have positive refractive power. Both the first lens and the second lens can have positive refractive power, and therefore sufficient light-collecting capability.

[0078] Unlike this disclosure, when the first lens has positive refractive power and the second lens has negative refractive power, the first lens can have very strong positive refractive power. In this case, the first lens may have reduced productivity due to its increased sensitivity.

[0079] Furthermore, the focal length of the first lens can be shorter than that of the second lens. That is, when the first lens has a stronger positive refractive power than the second lens, the first lens can have sufficient light-collecting ability while reducing its sensitivity.

[0080] Lenses included in an optical imaging system according to exemplary embodiments of this disclosure may each be made of plastic.

[0081] In particular, the third through eighth lenses can each be made of plastic with optical properties different from those of the lenses arranged adjacent to them. Therefore, the lenses can appropriately correct chromatic aberration to improve color characteristics.

[0082] For example, the third and fifth lenses can each be made of plastic with high refractive index and low dispersion value. For example, the third and fifth lenses can each have a refractive index greater than 1.64 and an Abbe number less than 21.

[0083] The fourth, seventh, and ninth lenses can each be made of plastic with high dispersion values, and the sixth and eighth lenses can each be made of plastic with medium dispersion values.

[0084] An optical imaging system according to an exemplary embodiment of this disclosure may have an Fno of less than 2.0, and therefore the optical imaging system may be brighter. In an exemplary embodiment, the optical imaging system may have an Fno greater than or equal to 1.7 and less than 2.0. Fno may represent the F-number of the optical imaging system.

[0085] An optical imaging system according to an exemplary embodiment of this disclosure may have a field of view greater than 70°. In an exemplary embodiment, the optical imaging system may have a field of view greater than 70° and less than 80°.

[0086] All lenses in the optical imaging system according to an exemplary embodiment of this disclosure may each have an aspherical surface. For example, the first to ninth lenses may each have at least one aspherical surface.

[0087] That is, at least one of the first surfaces and the second surfaces of the first lens to the ninth lens may be an aspherical surface. Here, the aspherical surfaces of the first lens to the ninth lens may be represented by Equation 1 below.

[0088] Equation 1

[0089] <0000​​​​​​​​​​​​​​​​​

[0096] In an exemplary embodiment, the optical imaging system can satisfy the condition -25 < f5 / f < 0. Here, f5 can represent the focal length of the fifth lens. Thus, the fifth lens can maintain an appropriate level of refractive power, thereby improving its aberration correction ability.

[0097] In an exemplary embodiment, the optical imaging system can satisfy the condition |f6 / f| > 2.0. Here, f6 can represent the focal length of the sixth lens. The sixth lens can thus have an appropriate level of refractive power to improve its aberration correction ability.

[0098] In an exemplary embodiment, the optical imaging system can satisfy the condition f7 / f < 5.0. Here, f7 can represent the focal length of the seventh lens. The seventh lens can thus have an appropriate level of refractive power to improve its aberration correction ability.

[0099] In an exemplary embodiment, the optical imaging system can satisfy the condition |f1 / f2| < 1.0. That is, the focal length of the first lens can be shorter than the focal length of the second lens. If the focal length of the second lens is too short (i.e., if the second lens has a strong refractive power), it is difficult to improve the aberration.

[0100] In an exemplary embodiment, the optical imaging system can satisfy the condition -2.0 < f1 / f3 < 0. Thus, the first lens and the third lens can each maintain their appropriate levels of refractive power, thereby improving the imaging quality.

[0101] In an exemplary embodiment, the optical imaging system can satisfy the condition TTL / f < 1.2. Here, TTL can represent the distance in the optical axis direction from the object side surface of the first lens to the imaging surface. Thus, the optical imaging system can be thinned while including the first lens to the ninth lens.

[0102] In an exemplary embodiment, the optical imaging system can satisfy the condition BFL / f < 0.3. Here, BFL can represent the distance in the optical axis direction from the image side surface of the ninth lens to the imaging surface. Thus, the optical imaging system can be thinned while including the first lens to the ninth lens.

[0103] In an exemplary embodiment, the optical imaging system can satisfy the condition D1 / f < 0.1. Here, D1 can represent the distance in the optical axis direction between the image side surface of the first lens and the object side surface of the second lens. Thus, the longitudinal chromatic aberration in the paraxial region can be appropriately corrected.

[0104] In the example implementation, the optical imaging system can satisfy the condition D7 / f < 0.1. Here, D7 can represent the distance along the optical axis between the image-side surface of the seventh lens and the object-side surface of the eighth lens. Therefore, longitudinal chromatic aberration in the paraxial region can be appropriately corrected.

[0105] In the example implementation, the optical imaging system can satisfy the condition D6-D1-D2>0.2mm. Here, D1 can represent the distance in the optical axis direction between the image-side surface of the first lens and the object-side surface of the second lens, D2 can represent the distance in the optical axis direction between the image-side surface of the second lens and the object-side surface of the third lens, and D6 can represent the distance in the optical axis direction between the image-side surface of the sixth lens and the object-side surface of the seventh lens. Therefore, its aberration correction capability can be improved.

[0106] In the example implementation, the optical imaging system can satisfy the condition SA11 / CT1 > 40° / mm. Here, SA11 can represent the sweep angle of the first lens at the end of its effective diameter on its object side, and CT1 can represent the thickness of the first lens in the optical axis direction. Therefore, aberration correction capability can be improved.

[0107] In the example implementation, the optical imaging system can satisfy the condition SA92 / CT9 > 50° / mm. Here, SA92 can represent the sweep angle at the end of the effective diameter of the ninth lens on its image-side surface, and CT9 can represent the thickness of the ninth lens in the optical axis direction. Therefore, aberration correction capability can be improved.

[0108] Figure 15 The sweep angle at a specific location on the lens's surface is shown. For example, the sweep angle of the ninth lens at the end of its effective diameter on its image-side surface can be defined as the angle formed between the tangent TL1 at the vertex of its image-side surface and the tangent TL2 at the end of its effective diameter.

[0109] When a lens has a convex object-side surface, its sweep angle can be positive, and when a lens has a concave object-side surface, its sweep angle can be negative.

[0110] Furthermore, when a lens has a convex image-side surface, its sweep angle can be negative, and when a lens has a concave image-side surface, its sweep angle can be positive.

[0111] In the example implementation, the optical imaging system can satisfy the condition SAG11 / CT1 > 0.70. Here, SAG11 can represent the SAG value at the end of the effective diameter of the first lens on its object side. Therefore, aberration correction capability can be improved.

[0112] When the lens has a convex object side surface, the SAG value measured at any position on the object side surface can have a positive value, and when the lens has a concave object side surface, the SAG value measured at any position on the object side surface can have a negative value.

[0113] In addition, when the lens has a convex image side surface, the SAG value measured at any position on the image side surface can have a negative value, and when the lens has a concave image side surface, the SAG value measured at any position on the image side surface can have a positive value.

[0114] In an exemplary embodiment, the optical imaging system can satisfy the condition of L7S2 / L8S1 > 0. The optical imaging system can satisfy the condition of 0.5 < L7S2 / L8S1 < 1.2. Here, L7S2 can represent the radius of curvature of the image side surface of the seventh lens, and L8S1 can represent the radius of curvature of the object side surface of the eighth lens. Thus, the seventh lens and the eighth lens can each maintain their appropriate levels of refractive power, thereby improving the imaging quality.

[0115] In an exemplary embodiment, the image side surface of the seventh lens and the object side surface of the eighth lens can have similar shapes and are arranged close to each other. In addition, the combined focal length of the seventh lens and the eighth lens can have a positive value.

[0116] In an exemplary embodiment, the optical imaging system can satisfy the condition of f1 > f12. Here, f12 can represent the combined focal length of the first lens and the second lens.

[0117] In an exemplary embodiment, the optical imaging system can satisfy the condition of |f3| < |f4|. Here, f3 can represent the focal length of the third lens, and f4 can represent the focal length of the fourth lens.

[0118] Reference Figure 1 and Figure 2 Describe an optical imaging system 100 according to a first exemplary embodiment of the present disclosure.

[0119] The optical imaging system 100 according to a first exemplary embodiment of the present disclosure can include a first lens 110, a second lens 120, a third lens 130, a fourth lens 140, a fifth lens 150, a sixth lens 160, a seventh lens 170, an eighth lens 180, and a ninth lens 190, and can also include an aperture, a filter IRCF, and an image sensor IS.

[0120] The optical imaging system 100 according to a first exemplary embodiment of the present disclosure can form a focus on an imaging surface 191. The imaging surface 191 can represent a surface on which the optical imaging system forms a focus. For example, the imaging surface 191 can represent a surface of the image sensor IS on which light is received.

[0121] Tables 1 and 2 show the characteristics of each lens (e.g., radius of curvature, lens thickness or distance between lenses, refractive index, Abbe number, and focal length).

[0122] Table 1

[0123] Face number Label radius of curvature Thickness or distance Refractive index Abbe number focal length S1 First lens 2.734 0.920 1.546 56.0 6.202 S2 12.479 0.065 S3 Second lens 12.093 0.280 1.546 56.0 129.516 S4 14.467 0.062 S5 Third lens 9.129 0.260 1.687 18.4 -14.934 S6 4.775 0.466 S7 Fourth lens -48.000 0.325 1.546 56.0 -933.596 S8 -53.114 0.278 S9 Fifth lens 50.934 0.400 1.667 20.4 -51.789 S10 20.518 0.587 S11 Sixth lens 11.504 0.500 1.570 37.4 70.584 S12 15.852 0.517 S13 Seventh Lens 3.582 0.452 1.546 56.0 8.946 S14 12.821 0.092 S15 Eighth lens 17.000 0.380 1.570 37.4 -886.213 S16 16.313 0.769 S17 Ninth Lens 6.016 0.503 1.546 56.0 -5.912 S18 2.039 0.370 S19 Filter infinity 0.110 1.518 64.2 S20 infinity 0.790 S21 Imaging surface infinity

[0124] Table 2

[0125]

[0126]

[0127] In Table 2, “f” can represent the total focal length of the optical imaging system, f12 can represent the combined focal length of the first lens and the second lens, FOV can represent the field of view of the optical imaging system, and SAG11 can represent the SAG value obtained at the end of the effective diameter of the object side of the first lens.

[0128] Furthermore, SA11 to SA92 represent the sweep angles of the respective lenses at the ends of their effective diameters on their object-side and image-side surfaces, in the order from the first lens to the ninth lens. For example, SA11 can represent the sweep angle of the first lens at the end of its effective diameter on its object-side surface, and SA12 can represent the sweep angle of the first lens at the end of its effective diameter on its image-side surface.

[0129] 1.82 is Fno of the optical imaging system 100 according to the first exemplary embodiment of the present disclosure.

[0130] In a first exemplary embodiment of this disclosure, the first lens 110 may have positive refractive power, as well as a convex first surface and a concave second surface.

[0131] The second lens 120 may have positive refractive power, as well as a convex first surface and a concave second surface.

[0132] The third lens 130 may have negative refractive power, as well as a convex first surface and a concave second surface.

[0133] The fourth lens 140 may have negative refractive power, and a concave first surface and a convex second surface.

[0134] The fifth lens 150 may have negative refractive power, and a first surface that protrudes in the paraxial region and a second surface that is recessed in the paraxial region.

[0135] Furthermore, at least one inflection point may be formed on at least one of the first and second surfaces of the fifth lens 150 in a region other than the paraxial region. For example, the first surface of the fifth lens 150 may bulge in the paraxial region and be concave in a region other than the paraxial region. The second surface of the fifth lens 150 may be concave in the paraxial region and bulge in a region other than the paraxial region.

[0136] The sixth lens 160 may have positive refractive power, and a first surface that protrudes in the paraxial region and a second surface that is recessed in the paraxial region.

[0137] Furthermore, at least one inflection point may be formed on at least one of the first and second surfaces of the sixth lens 160 in a region other than the paraxial region. For example, the first surface of the sixth lens 160 may bulge in the paraxial region and be concave in a region other than the paraxial region. The second surface of the sixth lens 160 may be concave in the paraxial region and bulge in a region other than the paraxial region.

[0138] The seventh lens 170 may have positive refractive power, and a first surface that protrudes in the paraxial region and a second surface that is recessed in the paraxial region.

[0139] Furthermore, at least one inflection point may be formed on at least one of the first and second surfaces of the seventh lens 170 in a region other than the paraxial region. For example, the first surface of the seventh lens 170 may bulge in the paraxial region and be concave in a region other than the paraxial region. The second surface of the seventh lens 170 may be concave in the paraxial region and bulge in a region other than the paraxial region.

[0140] The eighth lens 180 may have negative refractive power, and a first surface that protrudes in the paraxial region and a second surface that is recessed in the paraxial region.

[0141] Furthermore, at least one inflection point may be formed on at least one of the first and second surfaces of the eighth lens 180 in a region other than the paraxial region. For example, the first surface of the eighth lens 180 may bulge in the paraxial region and be concave in a region other than the paraxial region. The second surface of the eighth lens 180 may be concave in the paraxial region and bulge in a region other than the paraxial region.

[0142] The ninth lens 190 may have negative refractive power, and a first surface that protrudes in the paraxial region and a second surface that is recessed in the paraxial region.

[0143] Furthermore, at least one inflection point may be formed on at least one of the first and second surfaces of the ninth lens 190 in a region other than the paraxial region. For example, the first surface of the ninth lens 190 may bulge in the paraxial region and be concave in a region other than the paraxial region. The second surface of the ninth lens 190 may be concave in the paraxial region and bulge in a region other than the paraxial region.

[0144] Meanwhile, each surface of the first lens 110 to the ninth lens 190 may have the aspheric coefficient shown in Table 3. For example, the object side and image side of the first lens 110 to the ninth lens 190 may both be aspherical surfaces.

[0145] Table 3

[0146]

[0147]

[0148] Furthermore, the optical imaging system configured as described above can have Figure 2 The aberration characteristics shown are illustrated.

[0149] refer to Figure 3 and Figure 4 An optical imaging system 200 according to a second exemplary embodiment of the present disclosure is described.

[0150] An optical imaging system 200 according to a second exemplary embodiment of the present disclosure may include a first lens 210, a second lens 220, a third lens 230, a fourth lens 240, a fifth lens 250, a sixth lens 260, a seventh lens 270, an eighth lens 280, and a ninth lens 290, and may also include an aperture, an IRCF filter, and an image sensor IS.

[0151] According to a second exemplary embodiment of the present disclosure, the optical imaging system 200 can form a focal point on an imaging surface 291. The imaging surface 291 can represent a surface on which the optical imaging system forms a focal point. For example, the imaging surface 291 can represent a surface of an image sensor IS that receives light thereon.

[0152] Tables 4 and 5 show the characteristics of each lens (e.g., radius of curvature, lens thickness or distance between lenses, refractive index, Abbe number, and focal length).

[0153] Table 4

[0154]

[0155]

[0156] Table 5

[0157] f 6.779 SA42 15.8 f12 5.869 SA51 39.3 FOV 76 SA52 32.1 SAG11 0.77 SA61 35.8 SA11 41.6 SA62 21.5 SA12 6.2 SA71 26.5 SA21 8 SA72 45.8 SA22 2.8 SA81 44.1 SA31 15.4 SA82 36.6 SA32 28.1 SA91 19.5 SA41 9.4 SA92 27.9

[0158] The parameters shown in Table 5 are defined in the same way as in the first example implementation.

[0159] 1.79 is the Fno of the optical imaging system 200 according to the second exemplary embodiment of this disclosure.

[0160] In a second exemplary embodiment of this disclosure, the first lens 210 may have positive refractive power, as well as a convex first surface and a concave second surface.

[0161] The second lens 220 may have positive refractive power, as well as a convex first surface and a concave second surface.

[0162] The third lens 230 may have negative refractive power, as well as a convex first surface and a concave second surface.

[0163] The fourth lens 240 may have positive refractive power, as well as a concave first surface and a convex second surface.

[0164] The fifth lens 250 may have negative refractive power, and a first surface that protrudes in the paraxial region and a second surface that is recessed in the paraxial region.

[0165] Furthermore, at least one inflection point may be formed on at least one of the first and second surfaces of the fifth lens 250 in a region other than the paraxial region. For example, the first surface of the fifth lens 250 may bulge in the paraxial region and be concave in a region other than the paraxial region. The second surface of the fifth lens 250 may be concave in the paraxial region and bulge in a region other than the paraxial region.

[0166] The sixth lens 260 may have positive refractive power, and a first surface that protrudes in the paraxial region and a second surface that is recessed in the paraxial region.

[0167] Furthermore, at least one inflection point may be formed on at least one of the first and second surfaces of the sixth lens 260 in a region other than the paraxial region. For example, the first surface of the sixth lens 260 may bulge in the paraxial region and be concave in a region other than the paraxial region. The second surface of the sixth lens 260 may be concave in the paraxial region and bulge in a region other than the paraxial region.

[0168] The seventh lens 270 may have positive refractive power, and a first surface that protrudes in the paraxial region and a second surface that is recessed in the paraxial region.

[0169] Furthermore, at least one inflection point may be formed on at least one of the first and second surfaces of the seventh lens 270 in a region other than the paraxial region. For example, the first surface of the seventh lens 270 may bulge in the paraxial region and be concave in a region other than the paraxial region. The second surface of the seventh lens 270 may be concave in the paraxial region and bulge in a region other than the paraxial region.

[0170] The eighth lens 280 may have negative refractive power, and a first surface that protrudes in the paraxial region and a second surface that is recessed in the paraxial region.

[0171] Furthermore, at least one inflection point may be formed on at least one of the first and second surfaces of the eighth lens 280 in a region other than the paraxial region. For example, the first surface of the eighth lens 280 may bulge in the paraxial region and be concave in a region other than the paraxial region. The second surface of the eighth lens 280 may be concave in the paraxial region and bulge in a region other than the paraxial region.

[0172] The ninth lens 290 may have negative refractive power, and a first surface that protrudes in the paraxial region and a second surface that is recessed in the paraxial region.

[0173] Furthermore, at least one inflection point may be formed on at least one of the first and second surfaces of the ninth lens 290 in a region other than the paraxial region. For example, the first surface of the ninth lens 290 may bulge in the paraxial region and be concave in a region other than the paraxial region. The second surface of the ninth lens 290 may be concave in the paraxial region and bulge in a region other than the paraxial region.

[0174] Meanwhile, each surface of the first lens 210 to the ninth lens 290 may have the aspheric coefficient shown in Table 6. For example, the object-side surface and the image-side surface of the first lens 210 to the ninth lens 290 may both be aspherical surfaces.

[0175] Table 6

[0176]

[0177]

[0178] Furthermore, the optical imaging system configured as described above can have Figure 4 The aberration characteristics shown are illustrated.

[0179] refer to Figure 5 and Figure 6 An optical imaging system 300 according to a third exemplary embodiment of the present disclosure is described.

[0180] An optical imaging system 300 according to a third exemplary embodiment of the present disclosure may include a first lens 310, a second lens 320, a third lens 330, a fourth lens 340, a fifth lens 350, a sixth lens 360, a seventh lens 370, an eighth lens 380, and a ninth lens 390, and may also include an aperture, an IRCF filter, and an image sensor IS.

[0181] The optical imaging system 300 according to the third exemplary embodiment of this disclosure can form a focal point on an imaging surface 391. The imaging surface 391 can represent a surface on which the optical imaging system forms a focal point. For example, the imaging surface 391 can represent a surface of an image sensor IS that receives light thereon.

[0182] Tables 7 and 8 show the characteristics of each lens (e.g., radius of curvature, lens thickness or distance between lenses, refractive index, Abbe number, and focal length).

[0183] Table 7

[0184]

[0185]

[0186] Table 8

[0187] f 6.85 SA42 15.9 f12 5.874 SA51 39.3 FOV 75.5 SA52 32.2 SAG11 0.77 SA61 36 SA11 41.7 SA62 21.3 SA12 7 SA71 26 SA21 8.5 SA72 46.1 SA22 2.8 SA81 44.4 SA31 15.3 SA82 35.6 SA32 28 SA91 19.6 SA41 9.6 SA92 28.2

[0188] The definitions of the parameters shown in Table 8 can be the same as those in the first example implementation.

[0189] 1.81 is Fno of the optical imaging system 300 according to the third exemplary embodiment of this disclosure.

[0190] In a third exemplary embodiment of this disclosure, the first lens 310 may have positive refractive power, as well as a convex first surface and a concave second surface.

[0191] The second lens 320 may have positive refractive power, as well as a convex first surface and a concave second surface.

[0192] The third lens 330 may have negative refractive power, as well as a convex first surface and a concave second surface.

[0193] The fourth lens 340 may have negative refractive power, and a concave first surface and a convex second surface.

[0194] The fifth lens 350 may have negative refractive power, and a first surface that protrudes in the paraxial region and a second surface that is recessed in the paraxial region.

[0195] Furthermore, at least one inflection point may be formed on at least one of the first and second surfaces of the fifth lens 350 in a region other than the paraxial region. For example, the first surface of the fifth lens 350 may bulge in the paraxial region and be concave in a region other than the paraxial region. The second surface of the fifth lens 350 may be concave in the paraxial region and bulge in a region other than the paraxial region.

[0196] The sixth lens 360 may have positive refractive power, and a first surface that protrudes in the paraxial region and a second surface that is recessed in the paraxial region.

[0197] Furthermore, at least one inflection point may be formed on at least one of the first and second surfaces of the sixth lens 360 in a region other than the paraxial region. For example, the first surface of the sixth lens 360 may bulge in the paraxial region and be concave in a region other than the paraxial region. The second surface of the sixth lens 360 may be concave in the paraxial region and bulge in a region other than the paraxial region.

[0198] The seventh lens 370 may have positive refractive power, and a first surface that protrudes in the paraxial region and a second surface that is recessed in the paraxial region.

[0199] Furthermore, at least one inflection point may be formed on at least one of the first and second surfaces of the seventh lens 370 in a region other than the paraxial region. For example, the first surface of the seventh lens 370 may bulge in the paraxial region and be concave in a region other than the paraxial region. The second surface of the seventh lens 370 may be concave in the paraxial region and bulge in a region other than the paraxial region.

[0200] The eighth lens 380 may have negative refractive power, and a first surface that protrudes in the paraxial region and a second surface that is recessed in the paraxial region.

[0201] Furthermore, at least one inflection point may be formed on at least one of the first and second surfaces of the eighth lens 380 in a region other than the paraxial region. For example, the first surface of the eighth lens 380 may bulge in the paraxial region and be recessed in a region other than the paraxial region. The second surface of the eighth lens 380 may be recessed in the paraxial region and bulge in a region other than the paraxial region.

[0202] The ninth lens 390 may have negative refractive power, and a first surface that protrudes in the paraxial region and a second surface that is recessed in the paraxial region.

[0203] Furthermore, at least one inflection point may be formed on at least one of the first and second surfaces of the ninth lens 390 in a region other than the paraxial region. For example, the first surface of the ninth lens 390 may bulge in the paraxial region and be concave in a region other than the paraxial region. The second surface of the ninth lens 390 may be concave in the paraxial region and bulge in a region other than the paraxial region.

[0204] Meanwhile, each surface of the first lens 310 to the ninth lens 390 may have the aspheric coefficient shown in Table 9. For example, the object side and image side of the first lens 310 to the ninth lens 390 may both be aspherical surfaces.

[0205] Table 9

[0206]

[0207]

[0208] Furthermore, the optical imaging system configured as described above can have Figure 6 The aberration characteristics shown are illustrated.

[0209] refer to Figure 7 and Figure 8 An optical imaging system 400 according to a fourth exemplary embodiment of the present disclosure is described.

[0210] An optical imaging system 400 according to a fourth exemplary embodiment of the present disclosure may include a first lens 410, a second lens 420, a third lens 430, a fourth lens 440, a fifth lens 450, a sixth lens 460, a seventh lens 470, an eighth lens 480, and a ninth lens 490, and may also include an aperture, an IRCF filter, and an image sensor IS.

[0211] The optical imaging system 400 according to the fourth exemplary embodiment of this disclosure can form a focal point on an imaging surface 491. The imaging surface 491 can represent a surface on which the optical imaging system forms a focal point. For example, the imaging surface 491 can represent a surface of an image sensor IS that receives light thereon.

[0212] Tables 10 and 11 show the characteristics of each lens (e.g., radius of curvature, lens thickness or distance between lenses, refractive index, Abbe number, and focal length).

[0213] Table 10

[0214] Face number Label radius of curvature Thickness or distance Refractive index Abbe number focal length S1 First lens 2.736 0.904 1.546 56.0 6.261 S2 12.080 0.066 S3 Second lens 11.749 0.293 1.546 56.0 93.827 S4 15.110 0.063 S5 Third lens 9.422 0.242 1.677 19.2 -14.353 S6 4.734 0.465 S7 Fourth lens -68.855 0.310 1.546 56.0 721.559 S8 -58.708 0.274 S9 Fifth lens 50.719 0.400 1.667 20.4 -45.039 S10 18.805 0.590 S11 Sixth lens 10.245 0.492 1.570 37.4 60.013 S12 14.366 0.529 S13 Seventh Lens 3.614 0.435 1.546 56.0 8.904 S14 13.462 0.101 S15 Eighth lens 17.000 0.399 1.570 37.4 -897.221 S16 16.313 0.772 S17 Ninth Lens 5.898 0.501 1.546 56.0 -5.869 S18 2.015 0.370 S19 Filter infinity 0.110 1.518 64.2 S20 infinity 0.792 S21 Imaging surface infinity

[0215] Table 11

[0216]

[0217]

[0218] The definitions of the parameters shown in Table 11 can be the same as those in the first example implementation.

[0219] 1.83 is the Fno of the optical imaging system 400 according to the fourth exemplary embodiment of this disclosure.

[0220] In a fourth exemplary embodiment of this disclosure, the first lens 410 may have positive refractive power, as well as a convex first surface and a concave second surface.

[0221] The second lens 420 may have positive refractive power, as well as a convex first surface and a concave second surface.

[0222] The third lens 430 may have negative refractive power, as well as a convex first surface and a concave second surface.

[0223] The fourth lens 440 may have positive refractive power, as well as a concave first surface and a convex second surface.

[0224] The fifth lens 450 may have negative refractive power, and a first surface that protrudes in the paraxial region and a second surface that is recessed in the paraxial region.

[0225] Furthermore, at least one inflection point may be formed on at least one of the first and second surfaces of the fifth lens 450 in a region other than the paraxial region. For example, the first surface of the fifth lens 450 may bulge in the paraxial region and be concave in a region other than the paraxial region. The second surface of the fifth lens 450 may be concave in the paraxial region and bulge in a region other than the paraxial region.

[0226] The sixth lens 460 may have positive refractive power, and a first surface that protrudes in the paraxial region and a second surface that is recessed in the paraxial region.

[0227] Furthermore, at least one inflection point may be formed on at least one of the first and second surfaces of the sixth lens 460 in a region other than the paraxial region. For example, the first surface of the sixth lens 460 may bulge in the paraxial region and be concave in a region other than the paraxial region. The second surface of the sixth lens 460 may be concave in the paraxial region and bulge in a region other than the paraxial region.

[0228] The seventh lens 470 may have positive refractive power, and a first surface that protrudes in the paraxial region and a second surface that is recessed in the paraxial region.

[0229] Furthermore, at least one inflection point may be formed on at least one of the first and second surfaces of the seventh lens 470 in a region other than the paraxial region. For example, the first surface of the seventh lens 470 may bulge in the paraxial region and be concave in a region other than the paraxial region. The second surface of the seventh lens 470 may be concave in the paraxial region and bulge in a region other than the paraxial region.

[0230] The eighth lens 480 may have negative refractive power, and a first surface that protrudes in the paraxial region and a second surface that is recessed in the paraxial region.

[0231] Furthermore, at least one inflection point may be formed on at least one of the first and second surfaces of the eighth lens 480 in a region other than the paraxial region. For example, the first surface of the eighth lens 480 may bulge in the paraxial region and be concave in a region other than the paraxial region. The second surface of the eighth lens 480 may be concave in the paraxial region and bulge in a region other than the paraxial region.

[0232] The ninth lens 490 may have negative refractive power, and a first surface that protrudes in the paraxial region and a second surface that is recessed in the paraxial region.

[0233] Furthermore, at least one inflection point may be formed on at least one of the first and second surfaces of the ninth lens 490 in a region other than the paraxial region. For example, the first surface of the ninth lens 490 may bulge in the paraxial region and be concave in a region other than the paraxial region. The second surface of the ninth lens 490 may be concave in the paraxial region and bulge in a region other than the paraxial region.

[0234] Meanwhile, each surface of the first lens 410 to the ninth lens 490 may have the aspheric coefficient shown in Table 12. For example, the object side and image side of the first lens 410 to the ninth lens 490 may both be aspherical surfaces.

[0235] Table 12

[0236]

[0237]

[0238] Furthermore, the optical imaging system configured as described above can have Figure 8 The aberration characteristics shown are illustrated.

[0239] refer to Figure 9 and Figure 10 An optical imaging system 500 according to a fifth exemplary embodiment of the present disclosure is described.

[0240] An optical imaging system 500 according to a fifth exemplary embodiment of the present disclosure may include a first lens 510, a second lens 520, a third lens 530, a fourth lens 540, a fifth lens 550, a sixth lens 560, a seventh lens 570, an eighth lens 580, and a ninth lens 590, and may also include an aperture, an IRCF filter, and an image sensor IS.

[0241] The optical imaging system 500 according to the fifth exemplary embodiment of this disclosure can form a focal point on an imaging surface 591. The imaging surface 591 can represent a surface on which the optical imaging system forms a focal point. For example, the imaging surface 591 can represent a surface of an image sensor IS that receives light thereon.

[0242] Tables 13 and 14 show the characteristics of each lens (e.g., radius of curvature, lens thickness or distance between lenses, refractive index, Abbe number, and focal length).

[0243] Table 13

[0244]

[0245]

[0246] Table 14

[0247] f 6.892 SA42 16.9 f12 5.914 SA51 39.9 FOV 75.1 SA52 33.1 SAG11 0.769 SA61 36.5 SA11 41.5 SA62 21.4 SA12 6.2 SA71 25.8 SA21 8.4 SA72 46.9 SA22 3.5 SA81 44.4 SA31 17 SA82 33.3 SA32 27.9 SA91 19.2 SA41 10.1 SA92 28.1

[0248] The definitions of the parameters shown in Table 14 can be the same as those in the first example implementation.

[0249] 1.81 is Fno of the optical imaging system 500 according to the fifth exemplary embodiment of this disclosure.

[0250] In a fifth exemplary embodiment of this disclosure, the first lens 510 may have positive refractive power, as well as a convex first surface and a concave second surface.

[0251] The second lens 520 may have positive refractive power, as well as a convex first surface and a concave second surface.

[0252] The third lens 530 may have negative refractive power, as well as a convex first surface and a concave second surface.

[0253] The fourth lens 540 may have positive refractive power, as well as a concave first surface and a convex second surface.

[0254] The fifth lens 550 may have negative refractive power, and a first surface that protrudes in the paraxial region and a second surface that is recessed in the paraxial region.

[0255] Furthermore, at least one inflection point may be formed on at least one of the first and second surfaces of the fifth lens 550 in a region other than the paraxial region. For example, the first surface of the fifth lens 550 may bulge in the paraxial region and be concave in a region other than the paraxial region. The second surface of the fifth lens 550 may be concave in the paraxial region and bulge in a region other than the paraxial region.

[0256] The sixth lens 560 may have positive refractive power, and a first surface that protrudes in the paraxial region and a second surface that is recessed in the paraxial region.

[0257] Furthermore, at least one inflection point may be formed on at least one of the first and second surfaces of the sixth lens 560 in a region other than the paraxial region. For example, the first surface of the sixth lens 560 may bulge in the paraxial region and be concave in a region other than the paraxial region. The second surface of the sixth lens 560 may be concave in the paraxial region and bulge in a region other than the paraxial region.

[0258] The seventh lens 570 may have positive refractive power, and a first surface that protrudes in the paraxial region and a second surface that is recessed in the paraxial region.

[0259] Furthermore, at least one inflection point may be formed on at least one of the first and second surfaces of the seventh lens 570 in a region other than the paraxial region. For example, the first surface of the seventh lens 570 may bulge in the paraxial region and be concave in a region other than the paraxial region. The second surface of the seventh lens 570 may be concave in the paraxial region and bulge in a region other than the paraxial region.

[0260] The eighth lens 580 may have negative refractive power, and a first surface that protrudes in the paraxial region and a second surface that is recessed in the paraxial region.

[0261] Furthermore, at least one inflection point may be formed on at least one of the first and second surfaces of the eighth lens 580 in a region other than the paraxial region. For example, the first surface of the eighth lens 580 may bulge in the paraxial region and be recessed in a region other than the paraxial region. The second surface of the eighth lens 580 may be recessed in the paraxial region and bulge in a region other than the paraxial region.

[0262] The ninth lens 590 may have negative refractive power, and a first surface that protrudes in the paraxial region and a second surface that is recessed in the paraxial region.

[0263] Furthermore, at least one inflection point may be formed on at least one of the first and second surfaces of the ninth lens 590 in a region other than the paraxial region. For example, the first surface of the ninth lens 590 may bulge in the paraxial region and be concave in a region other than the paraxial region. The second surface of the ninth lens 590 may be concave in the paraxial region and bulge in a region other than the paraxial region.

[0264] Meanwhile, each surface of the first lens 510 to the ninth lens 590 may have the aspheric coefficient shown in Table 15. For example, the object side and image side of the first lens 510 to the ninth lens 590 may both be aspherical surfaces.

[0265] Table 15

[0266]

[0267]

[0268] Furthermore, the optical imaging system configured as described above can have Figure 10 The aberration characteristics shown are illustrated.

[0269] refer to Figure 11 and Figure 12 An optical imaging system 600 according to a sixth exemplary embodiment of the present disclosure is described.

[0270] An optical imaging system 600 according to a sixth exemplary embodiment of the present disclosure may include a first lens 610, a second lens 620, a third lens 630, a fourth lens 640, a fifth lens 650, a sixth lens 660, a seventh lens 670, an eighth lens 680, and a ninth lens 690, and may also include an aperture, an IRCF filter, and an image sensor IS.

[0271] The optical imaging system 600 according to the sixth exemplary embodiment of this disclosure can form a focal point on an imaging surface 691. The imaging surface 691 can represent a surface on which the optical imaging system forms a focal point. For example, the imaging surface 691 can represent a surface of an image sensor IS that receives light thereon.

[0272] Tables 16 and 17 show the characteristics of each lens (e.g., radius of curvature, lens thickness or distance between lenses, refractive index, Abbe number, and focal length).

[0273] Table 16

[0274] Face number Label radius of curvature Thickness or distance Refractive index Abbe number focal length S1 First lens 2.738 0.914 1.546 56.0 6.202 S2 12.250 0.066 S3 Second lens 11.925 0.294 1.546 56.0 129.516 S4 15.278 0.062 S5 Third lens 9.520 0.242 1.677 19.2 -14.934 S6 4.747 0.460 S7 Fourth lens -80.000 0.307 1.546 56.0 -933.596 S8 -82.565 0.270 S9 Fifth lens 33.511 0.379 1.667 20.4 -51.789 S10 15.957 0.577 S11 Sixth lens 9.556 0.494 1.570 37.4 70.584 S12 12.984 0.543 S13 Seventh Lens 3.650 0.423 1.546 56.0 8.946 S14 15.738 0.090 S15 Eighth lens 15.925 0.403 1.570 37.4 -886.213 S16 16.398 0.764 S17 Ninth Lens 6.195 0.494 1.546 56.0 -5.912 S18 2.020 0.370 S19 Filter infinity 0.110 1.518 64.2 S20 infinity 0.808 S21 Imaging surface infinity

[0275] Table 17

[0276]

[0277]

[0278] The definitions of the parameters shown in Table 17 can be the same as those in the first example implementation.

[0279] 1.80 is Fno of the optical imaging system 600 according to the sixth exemplary embodiment of this disclosure.

[0280] In a sixth exemplary embodiment of this disclosure, the first lens 610 may have positive refractive power, as well as a convex first surface and a concave second surface.

[0281] The second lens 620 may have positive refractive power, as well as a convex first surface and a concave second surface.

[0282] The third lens 630 may have negative refractive power, as well as a convex first surface and a concave second surface.

[0283] The fourth lens 640 may have negative refractive power, and a concave first surface and a convex second surface.

[0284] The fifth lens 650 may have negative refractive power, and a first surface that protrudes in the paraxial region and a second surface that is recessed in the paraxial region.

[0285] Furthermore, at least one inflection point may be formed on at least one of the first and second surfaces of the fifth lens 650 in a region other than the paraxial region. For example, the first surface of the fifth lens 650 may bulge in the paraxial region and be concave in a region other than the paraxial region. The second surface of the fifth lens 650 may be concave in the paraxial region and bulge in a region other than the paraxial region.

[0286] The sixth lens 660 may have positive refractive power, and a first surface that protrudes in the paraxial region and a second surface that is recessed in the paraxial region.

[0287] Furthermore, at least one inflection point may be formed on at least one of the first and second surfaces of the sixth lens 660 in a region other than the paraxial region. For example, the first surface of the sixth lens 660 may bulge in the paraxial region and be concave in a region other than the paraxial region. The second surface of the sixth lens 660 may be concave in the paraxial region and bulge in a region other than the paraxial region.

[0288] The seventh lens 670 may have positive refractive power, and a first surface that protrudes in the paraxial region and a second surface that is recessed in the paraxial region.

[0289] Furthermore, at least one inflection point may be formed on at least one of the first and second surfaces of the seventh lens 670 in a region other than the paraxial region. For example, the first surface of the seventh lens 670 may bulge in the paraxial region and be concave in a region other than the paraxial region. The second surface of the seventh lens 670 may be concave in the paraxial region and bulge in a region other than the paraxial region.

[0290] The eighth lens 680 may have positive refractive power, and a first surface that protrudes in the paraxial region and a second surface that is recessed in the paraxial region.

[0291] Furthermore, at least one inflection point may be formed on at least one of the first and second surfaces of the eighth lens 680 in a region other than the paraxial region. For example, the first surface of the eighth lens 680 may bulge in the paraxial region and be recessed in a region other than the paraxial region. The second surface of the eighth lens 680 may be recessed in the paraxial region and bulge in a region other than the paraxial region.

[0292] The ninth lens 690 may have negative refractive power, and a first surface that protrudes in the paraxial region and a second surface that is recessed in the paraxial region.

[0293] Furthermore, at least one inflection point may be formed on at least one of the first and second surfaces of the ninth lens 690 in a region other than the paraxial region. For example, the first surface of the ninth lens 690 may bulge in the paraxial region and be concave in a region other than the paraxial region. The second surface of the ninth lens 690 may be concave in the paraxial region and bulge in a region other than the paraxial region.

[0294] Meanwhile, each surface of the first lens 610 to the ninth lens 690 may have the aspheric coefficient shown in Table 18. For example, the object side and image side of the first lens 610 to the ninth lens 690 may both be aspherical surfaces.

[0295] Table 18

[0296]

[0297]

[0298]

[0299] Furthermore, the optical imaging system configured as described above can have, for example... Figure 12 The aberration characteristics shown are illustrated.

[0300] refer to Figure 13 and Figure 14 An optical imaging system 700 according to a seventh exemplary embodiment of the present disclosure is described.

[0301] An optical imaging system 700 according to a seventh exemplary embodiment of the present disclosure may include a first lens 710, a second lens 720, a third lens 730, a fourth lens 740, a fifth lens 750, a sixth lens 760, a seventh lens 770, an eighth lens 780, and a ninth lens 790, and may also include an aperture, an IRCF filter, and an image sensor IS.

[0302] The optical imaging system 700 according to the seventh exemplary embodiment of this disclosure can form a focal point on an imaging surface 791. The imaging surface 791 can represent a surface on which the optical imaging system forms a focal point. For example, the imaging surface 791 can represent a surface of an image sensor IS that receives light thereon.

[0303] Tables 19 and 20 show the characteristics of each lens (e.g., radius of curvature, lens thickness or distance between lenses, refractive index, Abbe number, and focal length).

[0304] Table 19

[0305]

[0306]

[0307] Table 20

[0308] f 6.84 SA42 16 f12 5.874 SA51 39.4 FOV 75.5 SA52 32.3 SAG11 0.77 SA61 36 SA11 41.6 SA62 21.3 SA12 7.1 SA71 25.8 SA21 8.6 SA72 46.5 SA22 2.9 SA81 44.6 SA31 15.5 SA82 35.5 SA32 28.1 SA91 19.5 SA41 9.6 SA92 28.1

[0309] The definitions of the parameters shown in Table 20 can be the same as those in the first example implementation.

[0310] 1.80 is Fno of the optical imaging system 700 according to the seventh exemplary embodiment of this disclosure.

[0311] In a seventh exemplary embodiment of this disclosure, the first lens 710 may have positive refractive power, as well as a convex first surface and a concave second surface.

[0312] The second lens 720 may have positive refractive power, as well as a convex first surface and a concave second surface.

[0313] The third lens 730 may have negative refractive power, as well as a convex first surface and a concave second surface.

[0314] The fourth lens 740 may have positive refractive power, as well as a concave first surface and a convex second surface.

[0315] The fifth lens 750 may have negative refractive power, and a first surface that protrudes in the paraxial region and a second surface that is recessed in the paraxial region.

[0316] Furthermore, at least one inflection point may be formed on at least one of the first and second surfaces of the fifth lens 750 in a region other than the paraxial region. For example, the first surface of the fifth lens 750 may bulge in the paraxial region and be concave in a region other than the paraxial region. The second surface of the fifth lens 750 may be concave in the paraxial region and bulge in a region other than the paraxial region.

[0317] The sixth lens 760 may have positive refractive power, and a first surface that protrudes in the paraxial region and a second surface that is recessed in the paraxial region.

[0318] Furthermore, at least one inflection point may be formed on at least one of the first and second surfaces of the sixth lens 760 in a region other than the paraxial region. For example, the first surface of the sixth lens 760 may bulge in the paraxial region and be concave in a region other than the paraxial region. The second surface of the sixth lens 760 may be concave in the paraxial region and bulge in a region other than the paraxial region.

[0319] The seventh lens 770 may have positive refractive power, and a first surface that protrudes in the paraxial region and a second surface that is recessed in the paraxial region.

[0320] Furthermore, at least one inflection point may be formed on at least one of the first and second surfaces of the seventh lens 770 in a region other than the paraxial region. For example, the first surface of the seventh lens 770 may bulge in the paraxial region and be concave in a region other than the paraxial region. The second surface of the seventh lens 770 may be concave in the paraxial region and bulge in a region other than the paraxial region.

[0321] The eighth lens 780 may have positive refractive power, and a first surface that protrudes in the paraxial region and a second surface that is recessed in the paraxial region.

[0322] Furthermore, at least one inflection point may be formed on at least one of the first and second surfaces of the eighth lens 780 in a region other than the paraxial region. For example, the first surface of the eighth lens 780 may bulge in the paraxial region and be recessed in a region other than the paraxial region. The second surface of the eighth lens 780 may be recessed in the paraxial region and bulge in a region other than the paraxial region.

[0323] The ninth lens 790 may have negative refractive power, and a first surface that protrudes in the paraxial region and a second surface that is recessed in the paraxial region.

[0324] Furthermore, at least one inflection point may be formed on at least one of the first and second surfaces of the ninth lens 790 in a region other than the paraxial region. For example, the first surface of the ninth lens 790 may bulge in the paraxial region and be recessed in a region other than the paraxial region. The second surface of the ninth lens 790 may be recessed in the paraxial region and bulge in a region other than the paraxial region.

[0325] Meanwhile, each surface of the first lens 710 to the ninth lens 790 may have the aspheric coefficient shown in Table 21. For example, the object-side surface and the image-side surface of the first lens 710 to the ninth lens 790 may both be aspherical surfaces.

[0326] Table 21

[0327]

[0328]

[0329] Furthermore, the optical imaging system configured as described above can have Figure 14 The aberration characteristics shown are illustrated.

[0330] Table 22 shows the values ​​of the conditional expressions used for the optical imaging system according to each example implementation.

[0331] Table 22

[0332]

[0333]

[0334] As described above, the optical imaging system according to one or more exemplary embodiments of the present disclosure can achieve high-resolution imaging.

[0335] While specific examples have been shown and described above, it will be apparent upon understanding this disclosure that various changes in form and detail may be made to these examples without departing from the spirit and scope of the claims and their equivalents. The examples described herein should be interpreted in a descriptive sense only and are not intended to be limiting. The description of features or aspects in each example should be considered applicable to similar features or aspects in other examples. Suitable results may also be obtained if the described techniques are performed in a different order, and / or if they are combined in a different manner, and / or if components in the described system, architecture, device, or circuit are replaced or supplemented with other components or their equivalents. Therefore, the scope of this disclosure is not limited by detailed description but by the claims and their equivalents, and all variations within the scope of the claims and their equivalents should be understood to be included in this disclosure.

Claims

1. An optical imaging system, including: The first lens, second lens, third lens, fourth lens, fifth lens, sixth lens, seventh lens, eighth lens, and ninth lens, arranged sequentially from the object side, and the image sensor used to convert the image of the incident object into an electrical signal. The first lens has positive refractive power, the second lens has positive refractive power, the third lens has negative refractive power, the fifth lens has negative refractive power, the sixth lens has positive refractive power, the seventh lens has positive refractive power, and the ninth lens has negative refractive power. The refractive power distribution of the fourth lens and the eighth lens is one of negative-negative, positive-negative, and positive-positive. The first to the third and fifth to the ninth lenses have a convex object-side surface and a concave image-side surface, and the fourth lens has a concave object-side surface and a convex image-side surface. The optical imaging system comprises nine lenses with refractive power. Wherein, 0.5 < L7S2 / L8S1 < 1.2, where L7S2 represents the radius of curvature of the image-side surface of the seventh lens, and L8S1 represents the radius of curvature of the object-side surface of the eighth lens, and Wherein, 15 < v7 - v8 < 25, where v7 represents the Abbe number of the seventh lens and v8 represents the Abbe number of the eighth lens.

2. The optical imaging system according to claim 1, wherein, The following conditions must be met: 25 < v1 - v3 < 45, where v1 represents the Abbe number of the first lens and v3 represents the Abbe number of the third lens.

3. The optical imaging system according to claim 2, wherein, It satisfies at least one of 25 < v1-v5 < 45 and 15 < v1-v6 < 25, where v5 represents the Abbe number of the fifth lens and v6 represents the Abbe number of the sixth lens.

4. The optical imaging system according to claim 1, wherein, The following condition is satisfied: 0.0479 ≤ |f1 / f2| ≤ 0.0692, where f1 represents the focal length of the first lens and f2 represents the focal length of the second lens.

5. The optical imaging system according to claim 4, wherein, It satisfies 0.8992 ≤ f1 / f ≤ 0.9239 and 13.3471 ≤ f2 / f ≤ 18.7786, where f represents the total focal length of the optical imaging system.

6. The optical imaging system according to claim 5, wherein, The following condition is satisfied: -2.1653 ≤ f3 / f ≤ -2.0869, where f3 represents the focal length of the third lens.

7. The optical imaging system according to claim 6, wherein, It satisfies 129.516 / -14.934 ≤ f2 / f3 ≤ 90.48 / -14.

189.

8. The optical imaging system according to claim 4, wherein, It satisfies at least one of 94.3739 ≤ |f4 / f| ≤ 719.8098, -7.5090 ≤ f5 / f ≤ -6.5482, 8.0021 ≤ |f6 / f| ≤ 10.2340, and 1.2161 ≤ f7 / f ≤ 1.3447, wherein f4 represents the focal length of the fourth lens, f5 represents the focal length of the fifth lens, f6 represents the focal length of the sixth lens, f7 represents the focal length of the seventh lens, and f represents the total focal length of the optical imaging system.

9. The optical imaging system according to claim 4, wherein, The condition 0.0094 ≤ D1 / f ≤ 0.0098 is satisfied, where f represents the total focal length of the optical imaging system, and D1 represents the distance on the optical axis between the image side of the first lens and the object side of the second lens.

10. The optical imaging system according to claim 1, wherein, The condition 0.0130 ≤ D7 / f ≤ 0.0146 is satisfied, where f represents the total focal length of the optical imaging system, and D7 represents the distance on the optical axis between the image side of the seventh lens and the object side of the eighth lens.

11. The optical imaging system according to claim 1, wherein, The following conditions must be met: 1.1700 ≤ TTL / f ≤ 1.1846 and 0.1841 ≤ BFL / f ≤ 0.1873, where TTL represents the distance on the optical axis from the object side of the first lens to the imaging surface, BFL represents the distance on the optical axis from the image side of the ninth lens to the imaging surface, and f represents the total focal length of the optical imaging system.

12. The optical imaging system according to claim 1, wherein, The following condition must be met: 0.3899 mm ≤ D6 - D1 - D2 ≤ 0.4242 mm, where D1 represents the distance on the optical axis between the image-side surface of the first lens and the object-side surface of the second lens, D2 represents the distance on the optical axis between the image-side surface of the second lens and the object-side surface of the third lens, and D6 represents the distance on the optical axis between the image-side surface of the sixth lens and the object-side surface of the seventh lens.

13. The optical imaging system according to claim 1, wherein, The following conditions must be met: 44.6061° / mm ≤ SA11 / CT1 ≤ 46.2503° / mm, where SA11 represents the sweep angle of the first lens at the end of its effective diameter on its object side, and CT1 represents the thickness of the first lens on the optical axis.

14. The optical imaging system according to claim 1, wherein, The following conditions must be met: 56.0599° / mm ≤ SA92 / CT9 ≤ 57.1802° / mm, where SA92 represents the sweep angle at the end of the effective diameter of the ninth lens on its image-side surface, and CT9 represents the thickness of the ninth lens on the optical axis.

15. The optical imaging system according to claim 1, wherein, The following condition is satisfied: 0.8266 ≤ SAG11 / CT1 ≤ 0.8520, where SAG11 represents the SAG value at the end of the effective diameter of the first lens on its object side, and CT1 represents the thickness of the first lens on the optical axis.

16. The optical imaging system according to claim 1, wherein, The condition is satisfied that |f3| < |f4|, where f3 represents the focal length of the third lens and f4 represents the focal length of the fourth lens.

17. An optical imaging system, comprising: The first lens, second lens, third lens, fourth lens, fifth lens, sixth lens, seventh lens, eighth lens, and ninth lens, arranged sequentially from the object side, and the image sensor used to convert the image of the incident object into an electrical signal. The first lens has positive refractive power, the second lens has positive refractive power, the third lens has negative refractive power, the fifth lens has negative refractive power, the sixth lens has positive refractive power, the seventh lens has positive refractive power, and the ninth lens has negative refractive power. The refractive power distribution of the fourth lens and the eighth lens is one of negative-negative, positive-negative, and positive-positive. The first to the third and fifth to the ninth lenses have a convex object-side surface and a concave image-side surface, and the fourth lens has a concave object-side surface and a convex image-side surface. The optical imaging system comprises nine lenses with refractive power. The seventh lens has an Abbe number different from that of the eighth lens, and satisfies 0.5 < L7S2 / L8S1 < 1.2, where L7S2 represents the radius of curvature of the image-side surface of the seventh lens, and L8S1 represents the radius of curvature of the object-side surface of the eighth lens.

18. The optical imaging system according to claim 17, wherein, The image-side surface of the seventh lens and the object-side surface of the eighth lens each have at least one inflection point in their respective regions other than the paraxial region.

19. The optical imaging system according to claim 18, wherein, The third lens has negative refractive power and satisfies |f3| < |f4|, 25 < v1-v3 < 45, and 15 < v7-v8 < 25, where v1 represents the Abbe number of the first lens, v3 represents the Abbe number of the third lens, v7 represents the Abbe number of the seventh lens, v8 represents the Abbe number of the eighth lens, f3 represents the focal length of the third lens, and f4 represents the focal length of the fourth lens.

20. An optical imaging system, comprising: The first lens, second lens, third lens, fourth lens, fifth lens, sixth lens, seventh lens, eighth lens, and ninth lens, arranged sequentially from the object side, and the image sensor used to convert the image of the incident object into an electrical signal. The first lens has positive refractive power, the second lens has positive refractive power, the third lens has negative refractive power, the fifth lens has negative refractive power, the sixth lens has positive refractive power, the seventh lens has positive refractive power, and the ninth lens has negative refractive power. The refractive power distribution of the fourth lens and the eighth lens is one of negative-negative, positive-negative, and positive-positive. The first to the third and fifth to the ninth lenses have a convex object-side surface and a concave image-side surface, and the fourth lens has a concave object-side surface and a convex image-side surface. The optical imaging system comprises nine lenses with refractive power. Wherein, 0.5 < L7S2 / L8S1 < 1.2, where L7S2 represents the radius of curvature of the image side of the seventh lens, and L8S1 represents the radius of curvature of the object side of the eighth lens.

21. The optical imaging system according to claim 20, wherein, The following conditions must be met: 25 < v1 - v3 < 45, where v1 represents the Abbe number of the first lens and v3 represents the Abbe number of the third lens.

22. The optical imaging system according to claim 20, wherein, The following conditions must be met: |f3| < |f4|, 25 < v1-v5 < 45, and 15 < v1-v6 < 25, where f3 represents the focal length of the third lens, f4 represents the focal length of the fourth lens, v1 represents the Abbe number of the first lens, v5 represents the Abbe number of the fifth lens, and v6 represents the Abbe number of the sixth lens.

Images