Optical image capturing system

Abstract

The optical image capturing system includes a plurality of lenses arranged in order from an object side to an image plane, the plurality of lenses including a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens arranged in order. The second lens has positive refractive power. 0.9 lt is satisfied; (R1 + R2) / (R1-R2) lt; 1.1, and 0.4 lt; tTL / (2 * IMG HT) lt; 0.65 where R1 is a radius of curvature of the object side surface of the first lens, R2 is a radius of curvature of the image side surface of the first lens, TTL is a distance on the optical axis from the object side surface of the first lens to the imaging surface, and IMG HT is half a diagonal length of the imaging surface.

Description

[0001] Cross-references to related applications

[0002] This application claims the benefit of priority to Korean Patent Application No. 10-2024-0075827, filed on June 11, 2024, with the Korean Intellectual Property Office, and Korean Patent Application No. 10-2024-0133151, filed on September 30, 2024, with the Korean Intellectual Property Office. The entire disclosure of the aforementioned Korean patent applications is incorporated herein by reference for all purposes. Technical Field

[0003] This disclosure relates to optical imaging systems. Background Technology

[0004] Recent portable terminals may include cameras that include optical imaging systems with multiple lenses to enable video calls and image capture.

[0005] Furthermore, as the functionality of cameras in portable devices gradually increases, the demand for high-resolution cameras used in portable devices is also increasing.

[0006] Furthermore, as the size of portable devices gradually decreases, the thickness of cameras used in these devices needs to be reduced. Therefore, the goal could be to develop optical imaging systems that offer high resolution while maintaining a reduced thickness.

[0007] The above information is presented as background information only to aid in understanding this disclosure. No determination is made, and no assertion is made, regarding whether any of the above content is applicable to the prior art relative to this disclosure. Utility Model Content

[0008] This summary portion is provided to briefly introduce the selection of concepts, which will be further described in the detailed description portion below. This summary portion is not intended to identify key or essential features of the claimed subject matter, nor is it intended to help determine the scope of the claimed subject matter.

[0009] In one general aspect, an optical imaging system includes a plurality of lenses sequentially arranged from the object side to the imaging surface. The plurality of lenses include a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens arranged in sequence. The second lens has a positive refractive power. 0.9 < |(R1 + R2) / (R1 - R2)| < 1.1 and 0.4 < TTL / (2×IMG HT) < 0.65 are satisfied, where R1 is the radius of curvature of the object side surface of the first lens, R2 is the radius of curvature of the image side surface of the first lens, TTL is the distance on the optical axis from the object side surface of the first lens to the imaging surface, and IMG HT is half of the diagonal length of the imaging surface.

[0010] |R1| > 500 mm can be satisfied.

[0011] The object side surface of the first lens can be planar in its paraxial region.

[0012] The object side surface of the first lens can be a spherical surface.

[0013] -35 < v1 - v2 ≤ 0 can be satisfied, where v1 is the Abbe number of the first lens and v2 is the Abbe number of the second lens.

[0014] n2 + n3 > 3.15 can be satisfied, where n2 is the refractive index of the second lens and n3 is the refractive index of the third lens.

[0015] 1.0 < TTL / f < 1.7 can be satisfied, where f is the total focal length of the optical imaging system.

[0016] -2.5 < f - TTL_2 < -0.2 can be satisfied, where f is the total focal length of the optical imaging system and TTL_2 is the distance on the optical axis from the object side surface of the second lens to the imaging surface.

[0017] 0.05 < |f / f1| < 1.3 can be satisfied, where f is the total focal length of the optical imaging system and f1 is the focal length of the first lens.

[0018] 0.001 < D1 / f < 0.04 can be satisfied, where D1 is the distance on the optical axis between the image side surface of the first lens and the object side surface of the second lens, and f is the total focal length of the optical imaging system.

[0019] 0.4 < f / f2 + f / f3 < 1.7 can be satisfied, where f is the total focal length of the optical imaging system, f2 is the focal length of the second lens, and f3 is the focal length of the third lens.

[0020] The seventh lens can be the lens closest to the imaging surface, and the third lens can have a negative refractive power, the fourth lens can have a positive refractive power, and the fifth lens can have a negative refractive power.

[0021] The optical imaging system may also include an eighth lens disposed between the seventh lens and the imaging plane, wherein each of the fourth and sixth lenses may have positive refractive power and the eighth lens may have negative refractive power.

[0022] The optical imaging system may also include an eighth and a ninth lens arranged sequentially between the seventh lens and the imaging plane, wherein the fourth lens may have positive refractive power.

[0023] The optical imaging system may also include an eighth, a ninth, and a tenth lens arranged sequentially between the seventh lens and the imaging plane, wherein the fourth lens may have positive refractive power and the tenth lens may have negative refractive power.

[0024] Among the absolute values ​​of the focal lengths of multiple lenses, the second lens can have the smallest absolute focal length.

[0025] When the absolute value of the focal length of a plurality of lenses is greater than the total focal length of the optical imaging system, and the number of such lenses is Nfa and the total number of such lenses is NL, then Nfa > NL / 2.

[0026] Other features and aspects will become apparent from the following detailed description and accompanying drawings. Attached Figure Description

[0027] Figure 1 This is a configuration diagram illustrating an optical imaging system according to a first exemplary embodiment of the present disclosure.

[0028] Figure 2 It is shown Figure 1 The diagram shows the aberration characteristics of the optical imaging system.

[0029] Figure 3 This is a configuration diagram illustrating an optical imaging system according to a second exemplary embodiment of the present disclosure.

[0030] Figure 4 It is shown Figure 3 The diagram shows the aberration characteristics of the optical imaging system.

[0031] Figure 5 This is a configuration diagram illustrating an optical imaging system according to a third exemplary embodiment of the present disclosure.

[0032] Figure 6 It is shown Figure 5 The diagram shows the aberration characteristics of the optical imaging system.

[0033] Figure 7 This is a configuration diagram illustrating an optical imaging system according to a fourth exemplary embodiment of the present disclosure.

[0034] Figure 8 It is shown Figure 7 The diagram shows the aberration characteristics of the optical imaging system.

[0035] Figure 9 This is a configuration diagram illustrating an optical imaging system according to a fifth exemplary embodiment of the present disclosure.

[0036] Figure 10 It is shown Figure 9 The diagram shows the aberration characteristics of the optical imaging system.

[0037] Figure 11 This is a configuration diagram illustrating an optical imaging system according to a sixth exemplary embodiment of the present disclosure.

[0038] Figure 12 It is shown Figure 11 The diagram shows the aberration characteristics of the optical imaging system.

[0039] Figure 13 This is a configuration diagram illustrating an optical imaging system according to a seventh exemplary embodiment of the present disclosure.

[0040] Figure 14 It is shown Figure 13 The diagram shows the aberration characteristics of the optical imaging system.

[0041] Figure 15 This is a configuration diagram illustrating an optical imaging system according to an eighth exemplary embodiment of the present disclosure.

[0042] Figure 16 It is shown Figure 15 The diagram shows the aberration characteristics of the optical imaging system.

[0043] Figure 17 This is a configuration diagram illustrating an optical imaging system according to a ninth exemplary embodiment of the present disclosure.

[0044] Figure 18 It is shown Figure 17 The diagram shows the aberration characteristics of the optical imaging system.

[0045] Throughout the accompanying drawings and specific embodiments, the same reference numerals refer to the same elements unless otherwise described. 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. Specifically, the shapes of spherical or aspherical surfaces shown in the drawings are presented as examples only, but this disclosure is not limited thereto. Detailed Implementation

[0046] In the following description, although examples of this disclosure will be described in detail with reference to the accompanying drawings, it should be noted that the examples are not limited thereto.

[0047] The following detailed embodiments are provided to aid the reader in gaining a comprehensive 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 become 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, as will become apparent upon understanding this disclosure. Furthermore, for clarity and brevity, descriptions of features well-known in the art may be omitted.

[0048] The features described herein may be implemented in different forms and should not be construed as being limited to the examples described herein. Rather, the examples described herein are provided merely to illustrate some of the many possible ways in which the methods, apparatuses, and / or systems described herein will become apparent upon understanding this disclosure.

[0049] Throughout this specification, when an element such as a layer, region, or substrate is described as being "on," "connected to," or "attached to" another element, the element may be directly "on," directly "connected to," or directly "attached to" the other element, or there may be one or more other elements between the element and the other element. Conversely, when an element is described as being "directly on," "directly connected to," or "directly attached to" another element, there are no other elements between the element and the other element.

[0050] As used herein, the term “and / or” includes any one of the associated listed items and any combination of any two or more items; similarly, “at least one” includes any one of the associated listed items and any combination of any two or more items.

[0051] 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 these examples may also be referred to as a second component, second part, second region, second layer, or second section.

[0052] Spatial relative terms such as “above,” “above,” “below,” and “under” 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 “under” that other element. Thus, depending on the spatial orientation of the device, the term “above” covers both orientations of “above” and “below”. The device may also be oriented in other ways (e.g., rotated 90 degrees or in other orientations), and the spatial relative terms used herein should be interpreted accordingly.

[0053] 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 terms “a,” “an,” and “the” are intended to include the plural form as well. The terms “comprising,” “including,” and “having” indicate the presence of the stated features, quantities, operations, components, elements, and / or combinations thereof, but do not preclude the presence or addition of one or more other features, quantities, operations, components, elements, and / or combinations thereof.

[0054] Due to manufacturing techniques and / or tolerances, the shapes shown in the accompanying drawings may vary. 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.

[0055] It should be noted that in this document, the term "may" is used relative to examples, such as regarding what an example may include or implement, meaning that there exists at least one example that includes or implements such a feature, but not all examples are limited to this.

[0056] The features of the examples described herein can be combined in various ways that will become apparent upon understanding this disclosure. Furthermore, although the examples described herein have multiple configurations, other configurations that will become apparent upon understanding this disclosure are also possible.

[0057] One aspect of this disclosure is to provide an optical imaging system with high resolution and reduced thickness.

[0058] An optical imaging system according to an exemplary embodiment of the present disclosure may include a plurality of lenses. The plurality of lenses may include at least seven lenses. For example, an optical imaging system according to an exemplary embodiment of the present disclosure may include seven, eight, nine, or ten lenses.

[0059] In an exemplary embodiment, the foremost lens may refer to the first lens disposed closest to the object side, and the last lens may refer to the seventh lens disposed closest to the imaging surface (or image sensor).

[0060] In an exemplary embodiment, the last lens may refer to the eighth lens that is positioned closest to the imaging surface (or image sensor).

[0061] In an exemplary embodiment, the last lens may refer to the ninth lens that is positioned closest to the imaging surface (or image sensor).

[0062] In an exemplary embodiment, the last lens may refer to the tenth lens that is closest to the imaging surface (or image sensor).

[0063] Furthermore, as used in this article, all values ​​of 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 (°).

[0064] Furthermore, in the description of the shape of each lens, a surface with a convex shape may mean that the paraxial region of the surface is convex, and a surface with a concave shape may mean that the paraxial region of the surface is concave.

[0065] Therefore, even when a surface describing a lens has a convex shape, the edge portion of that surface can be concave. Similarly, even when a surface describing a lens has a concave shape, the edge portion of that surface can be convex.

[0066] Furthermore, in the description of the shape of each lens, a surface being planar can mean that the paraxial region of that surface is planar.

[0067] The paraxial region can refer to a very narrow region near and including the optical axis.

[0068] An imaging surface can refer to a virtual surface on which an optical imaging system focuses its light. Alternatively, an imaging surface can refer to a surface of an image sensor that receives light.

[0069] An optical imaging system according to an exemplary embodiment of the present disclosure may include at least seven lenses.

[0070] In an exemplary embodiment, the optical imaging system may include a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens arranged sequentially from the object side. The first to seventh lenses may be spaced apart from each other by a predetermined distance along the optical axis.

[0071] In an exemplary embodiment, the optical imaging system may include 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 from the object side. The first lens to the eighth lens may be spaced apart from each other by a predetermined distance along the optical axis.

[0072] In an exemplary embodiment, the optical imaging system 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 spaced apart from each other by a predetermined distance along the optical axis.

[0073] In an exemplary embodiment, the optical imaging system 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, a ninth lens, and a tenth lens arranged sequentially from the object side. The first to tenth lenses may 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 the present 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") for blocking infrared light. The filter may be positioned between the final lens and the image sensor.

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

[0077] Multiple lenses included in an optical imaging system according to an exemplary embodiment of the present disclosure may be formed of a plastic material.

[0078] In addition, at least one of the multiple lenses may have an aspherical surface.

[0079] In an exemplary embodiment, the object-side surface of the first lens may be a spherical surface, and the image-side surface of the first lens and the object-side and image-side surfaces of the remaining lenses may be aspherical surfaces, respectively.

[0080] In an exemplary embodiment, the object-side surface and image-side surface of the first lens may be spherical surfaces, and the object-side surface and image-side surface of the remaining lenses may be aspherical surfaces.

[0081] The aspherical surface of each lens can be represented by Equation 1 below.

[0082] Equation 1:

[0083]

[0084] In Equation 1, c can represent the curvature of the lens (the reciprocal of the radius of curvature), K can represent the conic constant, and Y can represent the distance from an arbitrary point on the aspherical surface of the lens to the optical axis. In addition, the constants A to H, J, and L to P can represent the aspherical coefficients. Z can represent the distance in the optical axis direction between an arbitrary point on the aspherical surface of the lens and the vertex of the aspherical surface.

[0085] The optical imaging system according to an exemplary embodiment of the present disclosure may satisfy at least one of the following conditional equations.

[0086] In an exemplary embodiment, the optical imaging system may satisfy the condition of 0.4 < TTL / (2 × IMG HT) < 0.65. Here, TTL may be the distance from the object side surface of the first lens to the imaging surface on the optical axis, and IMG HT may be half of the diagonal length of the imaging surface. Therefore, the resolution of the image can be improved, and the size of the optical imaging system can be reduced.

[0087] In an exemplary embodiment, the optical imaging system may satisfy the condition of 0.4 < TTL / (2 × IMG HT) < 0.6.

[0088] In an exemplary embodiment, the optical imaging system may satisfy the condition of -35 < v1 - v2 ≤ 0. Here, v1 may be the Abbe number of the first lens, and v2 may be the Abbe number of the second lens. Therefore, chromatic aberration can be improved.

[0089] In an exemplary embodiment, the optical imaging system may satisfy the condition of n2 + n3 > 3.15. Here, n2 may be the refractive index of the second lens, and n3 may be the refractive index of the third lens. Therefore, the resolution of the image can be improved, and chromatic aberration can be improved.

[0090] In an exemplary embodiment, the optical imaging system may satisfy the condition of -2.5 < f - TTL_2 < -0.2. Here, f may be the total focal length of the optical imaging system, and TTL_2 may be the distance from the object side surface of the second lens to the imaging surface on the optical axis. Therefore, the size of the optical imaging system can be reduced.

[0091] In an exemplary embodiment, the optical imaging system may satisfy the condition of 0.05 < |f / f1| < 1.3. Here, f1 may be the focal length of the first lens. Therefore, the refractive power of the first lens can be appropriately adjusted to minimize the occurrence of aberration.

[0092] In an exemplary embodiment, the optical imaging system may satisfy the condition of 0.001 < D1 / f < 0.04. Here, D1 may be 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. Therefore, chromatic aberration can be improved.

[0093] In an exemplary embodiment, the optical imaging system may satisfy the condition of 0.4 < f / f2 + f / f3 < 1.7. Here, f2 may be the focal length of the second lens, and f3 may be the focal length of the third lens. Thus, chromatic aberration can be improved.

[0094] In an exemplary embodiment, the optical imaging system may satisfy the condition of |R1| > 500 mm. Here, R1 may be the radius of curvature of the object side surface of the first lens. Thus, the object side surface of the first lens may be a plane or may be formed to be close to a plane, thereby reducing the size of the optical imaging system and increasing the design freedom.

[0095] In an exemplary embodiment, the optical imaging system may satisfy the condition of 0.9 < |(R1 + R2) / (R1 - R2)| < 1.1. Here, R2 may be the radius of curvature of the image side surface of the first lens. Thus, the size of the optical imaging system can be reduced.

[0096] In an exemplary embodiment, the optical imaging system may satisfy the condition of Nfa > NL / 2. Here, Nfa may be the number of lenses among the plurality of lenses whose absolute value of the focal length is greater than the total focal length of the optical imaging system, and NL may be the number of the plurality of lenses. Thus, the sensitivity can be reduced when manufacturing each lens.

[0097] In an exemplary embodiment, the optical imaging system may satisfy the condition of 1.0 < TTL / f < 1.7. Thus, the size of the optical imaging system can be reduced.

[0098] The first lens may have a positive refractive power or a negative refractive power. In addition, the first lens may have a meniscus shape convex toward the object side. For example, the paraxial region of the object side surface of the first lens may have a convex shape, and the paraxial region of the image side surface of the first lens may have a concave shape.

[0099] Alternatively, the first lens may have two surfaces that both have a convex shape. For example, the paraxial regions of the object side surface and the image side surface of the first lens may each have a convex shape.

[0100] The paraxial region of the object side surface of the first lens may be a plane or may be formed to be close to a plane.

[0101] The second lens may have a positive refractive power. In addition, the second lens may have a meniscus shape convex toward the object side. For example, the paraxial region of the object side surface of the second lens may have a convex shape, and the paraxial region of the image side surface of the second lens may have a concave shape.

[0102] In an exemplary embodiment, among the absolute values ​​of the focal lengths of the plurality of lenses in an optical imaging system, the second lens may have the smallest absolute value of focal length.

[0103] The third lens can have positive or negative refractive power. Furthermore, the third lens can have a meniscus shape that convexes towards the object side. For example, the paraxial region of the object-side surface of the third lens can have a convex shape, and the paraxial region of the image-side surface of the third lens can have a concave shape.

[0104] The fourth lens can have positive refractive power. Furthermore, the fourth lens can have a meniscus shape that convexes towards the object side. For example, the paraxial region of the object-side side of the fourth lens can have a convex shape, and the paraxial region of the image-side side of the fourth lens can have a concave shape.

[0105] Alternatively, the fourth lens may have two surfaces, both of which have a convex shape. For example, the paraxial region on the object side and the paraxial region on the image side of the fourth lens may each have a convex shape.

[0106] The fifth lens can have positive or negative refractive power. Furthermore, the fifth lens can have a meniscus shape that convexes towards the object side. For example, the paraxial region of the object-side surface of the fifth lens can have a convex shape, and the paraxial region of the image-side surface of the fifth lens can have a concave shape.

[0107] Alternatively, the fifth lens may have a meniscus shape that convexes toward the image side. For example, the paraxial region of the object side of the fifth lens may have a concave shape, and the paraxial region of the image side of the fifth lens may have a convex shape.

[0108] Alternatively, the fifth lens may have two surfaces, both of which have a concave shape. For example, the paraxial region on the object side and the paraxial region on the image side of the fifth lens may each have a concave shape.

[0109] The sixth lens can have positive or negative refractive power. Furthermore, the sixth lens can have a meniscus shape that convexes towards the object side. For example, the paraxial region of the object-side side of the sixth lens can have a convex shape, and the paraxial region of the image-side side of the sixth lens can have a concave shape.

[0110] Alternatively, the sixth lens may have a meniscus shape that convexes toward the image side. For example, the paraxial region of the object side of the sixth lens may have a concave shape, and the paraxial region of the image side of the sixth lens may have a convex shape.

[0111] Alternatively, the sixth lens may have two surfaces, both of which have a convex shape. For example, the paraxial region on the object side and the paraxial region on the image side of the sixth lens may each have a convex shape.

[0112] The seventh lens can have either positive or negative refractive power. Furthermore, the seventh lens can have two surfaces, each with a concave shape. For example, the paraxial region on the object side and the paraxial region on the image side of the seventh lens can each have a concave shape.

[0113] Alternatively, the seventh lens may have a meniscus shape that convexes toward the object side. For example, the paraxial region of the object side of the seventh lens may have a convex shape, and the paraxial region of the image side of the seventh lens may have a concave shape.

[0114] Alternatively, the seventh lens may have a meniscus shape that convexes toward the image side. For example, the paraxial region of the object side of the seventh lens may have a concave shape, and the paraxial region of the image side of the seventh lens may have a convex shape.

[0115] Alternatively, the seventh lens may have two surfaces, both of which have a convex shape. For example, the paraxial region on the object side and the paraxial region on the image side of the seventh lens may each have a convex shape.

[0116] The eighth lens can have positive or negative refractive power. Furthermore, the eighth lens can have a meniscus shape that convexes towards the object side. For example, the paraxial region of the object-side surface of the eighth lens can have a convex shape, and the paraxial region of the image-side surface of the eighth lens can have a concave shape.

[0117] Alternatively, the eighth lens may have a meniscus shape that convexes toward the image side. For example, the paraxial region of the object side of the eighth lens may have a concave shape, and the paraxial region of the image side of the eighth lens may have a convex shape.

[0118] Alternatively, the eighth lens may have two surfaces, both of which have a concave shape. For example, the paraxial region on the object side and the paraxial region on the image side of the eighth lens may each have a concave shape.

[0119] The ninth lens can have positive or negative refractive power. Furthermore, the ninth lens can have a meniscus shape that convexes towards the object side. For example, the paraxial region of the object-side surface of the ninth lens can have a convex shape, and the paraxial region of the image-side surface of the ninth lens can have a concave shape.

[0120] Alternatively, the ninth lens may have two surfaces, both of which have a convex shape. For example, the paraxial region on the object side and the paraxial region on the image side of the ninth lens may each have a convex shape.

[0121] The tenth lens can have negative refractive power. Furthermore, the tenth lens can have two surfaces, each with a concave shape. For example, the paraxial region on the object side and the paraxial region on the image side of the tenth lens can each have a concave shape.

[0122] Furthermore, at least one of the object-side and image-side surfaces of at least one of the second, fourth, and sixth through tenth lenses may have at least one inflection point. For example, the paraxial region of the object-side surface of the eighth lens may have a convex shape, and the portion of the object-side surface of the eighth lens other than the paraxial region may have a concave shape. The paraxial region of the image-side surface of the eighth lens may have a concave shape, and the portion of the image-side surface of the eighth lens other than the paraxial region may have a convex shape.

[0123] Furthermore, at least one of the object-side and image-side surfaces of the last lens among the multiple lenses in an optical imaging system may have at least one inversion point.

[0124] Reference Figure 1 and Figure 2 An optical imaging system 100 according to a first exemplary embodiment of the present disclosure is described.

[0125] An optical imaging system 100 according to a first exemplary embodiment of the present disclosure may include a first lens 101, a second lens 102, a third lens 103, a fourth lens 104, a fifth lens 105, a sixth lens 106, a seventh lens 107, and an eighth lens 108, and may also include a filter F and an image sensor.

[0126] An optical imaging system 100 according to a first exemplary embodiment of the present disclosure can form a focal point on an imaging surface IP.

[0127] Table 1 shows the lens characteristics (radius of curvature, lens thickness or distance between lenses, refractive index, and Abbe number) for each lens.

[0128] Table 1

[0129] Face number radius of curvature Thickness or distance Refractive index Abbe number S1 First lens infinity 0.300 1.646 23.5 S2 4.000 0.050 S3 Second lens 1.724 0.711 1.547 56.1 S4 7.031 0.242 S5 Third lens 5.123 0.256 1.669 20.4 S6 6.543 0.100 S7 Fourth lens 3.768 0.311 1.547 56.1 S8 4.517 0.107 S9 Fifth lens 2.339 0.275 1.547 56.1 S10 5.902 0.763 S11 Sixth lens 10.225 0.212 1.669 20.4 S12 31.628 0.281 S13 Seventh Lens -10.458 0.357 1.646 23.5 S14 9.455 0.424 S15 Eighth lens 4.421 0.568 1.537 55.7 S16 1.837 0.310 S17 Filter infinity 0.110 1.519 64.2 S18 infinity 0.476 S19 Imaging surface infinity

[0130] In a first exemplary embodiment of this disclosure, the first lens 101 may have negative refractive power, the paraxial region of the object side of the first lens 101 may be planar, and the paraxial region of the image side of the first lens 101 may have a concave shape.

[0131] The second lens 102 may have positive refractive power, the paraxial region on the object side of the second lens 102 may have a convex shape, and the paraxial region on the image side of the second lens 102 may have a concave shape.

[0132] The third lens 103 may have positive refractive power, the paraxial region on the object side of the third lens 103 may have a convex shape, and the paraxial region on the image side of the third lens 103 may have a concave shape.

[0133] The fourth lens 104 may have positive refractive power, the paraxial region on the object side of the fourth lens 104 may have a convex shape, and the paraxial region on the image side of the fourth lens 104 may have a concave shape.

[0134] The fifth lens 105 may have positive refractive power, the paraxial region on the object side of the fifth lens 105 may have a convex shape, and the paraxial region on the image side of the fifth lens 105 may have a concave shape.

[0135] The sixth lens 106 may have positive refractive power, the paraxial region on the object side of the sixth lens 106 may have a convex shape, and the paraxial region on the image side of the sixth lens 106 may have a concave shape.

[0136] The seventh lens 107 may have negative refractive power, and the paraxial region on the object side and the paraxial region on the image side of the seventh lens 107 may each have a concave shape.

[0137] The eighth lens 108 may have negative refractive power, the paraxial region on the object side of the eighth lens 108 may have a convex shape, and the paraxial region on the image side of the eighth lens 108 may have a concave shape.

[0138] Furthermore, at least one of the object-side surface and image-side surface of at least one of the second lens 102, the seventh lens 107, and the eighth lens 108 may have at least one inversion point.

[0139] The surface of each of the first lens 101 to the eighth lens 108 may have aspherical coefficients as shown in Table 2. For example, the object-side surface of the first lens 101 may be a spherical surface, and the image-side surface of the first lens 101 and the object-side and image-side surfaces of the second lens 102 to the eighth lens 108 may all be aspherical surfaces.

[0140] Table 2

[0141]

[0142]

[0143] Furthermore, the optical imaging system configured as described above can have, for example... Figure 2 The aberration characteristics shown are illustrated.

[0144] Reference Figure 3 and Figure 4 An optical imaging system 200 according to a second exemplary embodiment of the present disclosure is described.

[0145] An optical imaging system 200 according to a second exemplary embodiment of the present disclosure may include a first lens 201, a second lens 202, a third lens 203, a fourth lens 204, a fifth lens 205, a sixth lens 206, a seventh lens 207, and an eighth lens 208, and may also include a filter F and an image sensor.

[0146] An optical imaging system 200 according to a second exemplary embodiment of the present disclosure can form a focal point on an imaging surface IP.

[0147] Table 3 shows the lens characteristics (radius of curvature, lens thickness or distance between lenses, refractive index, and Abbe number) for each lens.

[0148] Table 3

[0149] Face number radius of curvature Thickness or distance Refractive index Abbe number S1 First lens infinity 0.400 1.547 56.1 S2 -40.000 0.100 S3 Second lens 2.013 0.792 1.547 56.1 S4 8.925 0.179 S5 Third lens 5.506 0.233 1.679 19.2 S6 2.847 0.137 S7 Fourth lens 4.581 0.383 1.537 55.7 S8 6.223 0.264 S9 Fifth lens -16.753 0.621 1.679 19.2 S10 -41.803 0.302 S11 Sixth lens 45.068 0.296 1.620 26.0 S12 47.630 0.569 S13 Seventh Lens 3.875 0.630 1.571 37.4 S14 6.416 0.863 S15 Eighth lens 47.188 0.185 1.537 55.7 S16 2.675 0.132 S17 Filter infinity 0.110 1.519 64.2 S18 infinity 0.544 S19 Imaging surface infinity

[0150] In a second exemplary embodiment of this disclosure, the first lens 201 may have positive refractive power, the paraxial region of the object side of the first lens 201 may be planar, and the paraxial region of the image side of the first lens 201 may have a convex shape.

[0151] The second lens 202 may have positive refractive power, the paraxial region on the object side of the second lens 202 may have a convex shape, and the paraxial region on the image side of the second lens 202 may have a concave shape.

[0152] The third lens 203 may have negative refractive power, the paraxial region on the object side of the third lens 203 may have a convex shape, and the paraxial region on the image side of the third lens 203 may have a concave shape.

[0153] The fourth lens 204 may have positive refractive power, the paraxial region on the object side of the fourth lens 204 may have a convex shape, and the paraxial region on the image side of the fourth lens 204 may have a concave shape.

[0154] The fifth lens 205 may have negative refractive power, the paraxial region on the object side of the fifth lens 205 may have a concave shape, and the paraxial region on the image side of the fifth lens 205 may have a convex shape.

[0155] The sixth lens 206 may have positive refractive power, the paraxial region on the object side of the sixth lens 206 may have a convex shape, and the paraxial region on the image side of the sixth lens 206 may have a concave shape.

[0156] The seventh lens 207 may have positive refractive power, the paraxial region on the object side of the seventh lens 207 may have a convex shape, and the paraxial region on the image side of the seventh lens 207 may have a concave shape.

[0157] The eighth lens 208 may have negative refractive power, the paraxial region on the object side of the eighth lens 208 may have a convex shape, and the paraxial region on the image side of the eighth lens 208 may have a concave shape.

[0158] Furthermore, at least one of the object side and image side of at least one of the sixth lens 206 to the eighth lens 208 may have at least one inversion point.

[0159] The surface of each of the first lens 201 to the eighth lens 208 may have aspherical coefficients as shown in Table 4. For example, the object-side surface of the first lens 201 may be a spherical surface, and the image-side surface of the first lens 201 and the object-side and image-side surfaces of the second lens 202 to the eighth lens 208 may all be aspherical surfaces.

[0160] Table 4

[0161]

[0162]

[0163]

[0164] Furthermore, the optical imaging system configured as described above can have, for example... Figure 4 The aberration characteristics shown are illustrated.

[0165] Reference Figure 5 and Figure 6 An optical imaging system 300 according to a third exemplary embodiment of the present disclosure is described.

[0166] An optical imaging system 300 according to a third exemplary embodiment of the present disclosure may include a first lens 301, a second lens 302, a third lens 303, a fourth lens 304, a fifth lens 305, a sixth lens 306, a seventh lens 307, and an eighth lens 308, and may also include a filter F and an image sensor.

[0167] An optical imaging system 300 according to a third exemplary embodiment of the present disclosure can form a focal point on an imaging surface IP.

[0168] Table 5 shows the lens characteristics (radius of curvature, lens thickness or distance between lenses, refractive index, and Abbe number) for each lens.

[0169] Table 5

[0170]

[0171]

[0172] In the third exemplary embodiment of this disclosure, the first lens 301 may have negative refractive power, the paraxial region of the object side of the first lens 301 may be planar, and the paraxial region of the image side of the first lens 301 may have a concave shape.

[0173] The second lens 302 may have positive refractive power, the paraxial region on the object side of the second lens 302 may have a convex shape, and the paraxial region on the image side of the second lens 302 may have a concave shape.

[0174] The third lens 303 may have negative refractive power, the paraxial region on the object side of the third lens 303 may have a convex shape, and the paraxial region on the image side of the third lens 303 may have a concave shape.

[0175] The fourth lens 304 may have positive refractive power, the paraxial region on the object side of the fourth lens 304 may have a convex shape, and the paraxial region on the image side of the fourth lens 304 may have a concave shape.

[0176] The fifth lens 305 may have negative refractive power, and the paraxial region on the object side and the paraxial region on the image side of the fifth lens 305 may each have a concave shape.

[0177] The sixth lens 306 may have positive refractive power, the paraxial region on the object side of the sixth lens 306 may have a convex shape, and the paraxial region on the image side of the sixth lens 306 may have a concave shape.

[0178] The seventh lens 307 may have positive refractive power, the paraxial region on the object side of the seventh lens 307 may have a convex shape, and the paraxial region on the image side of the seventh lens 307 may have a concave shape.

[0179] The eighth lens 308 may have negative refractive power, the paraxial region on the object side of the eighth lens 308 may have a convex shape, and the paraxial region on the image side of the eighth lens 308 may have a concave shape.

[0180] Furthermore, at least one of the object side and image side of at least one of the sixth lens 306 to the eighth lens 308 may have at least one inversion point.

[0181] The surface of each of the first lens 301 to the eighth lens 308 may have aspherical coefficients as shown in Table 6. For example, the object-side surface and the image-side surface of the first lens 301 may both be spherical surfaces, and the object-side surface and the image-side surface of the second lens 302 to the eighth lens 308 may both be aspherical surfaces.

[0182] Table 6

[0183]

[0184]

[0185] Furthermore, the optical imaging system configured as described above can have, for example... Figure 6 The aberration characteristics shown are illustrated.

[0186] Reference Figure 7 and Figure 8 An optical imaging system 400 according to a fourth exemplary embodiment of the present disclosure is described.

[0187] An optical imaging system 400 according to a fourth exemplary embodiment of the present disclosure may include a first lens 401, a second lens 402, a third lens 403, a fourth lens 404, a fifth lens 405, a sixth lens 406, a seventh lens 407, an eighth lens 408, and a ninth lens 409, and may also include a filter F and an image sensor.

[0188] An optical imaging system 400 according to a fourth exemplary embodiment of the present disclosure can form a focal point on an imaging surface IP.

[0189] Table 7 shows the lens characteristics (radius of curvature, lens thickness or distance between lenses, refractive index, and Abbe number) for each lens.

[0190] Table 7

[0191]

[0192]

[0193] In the fourth exemplary embodiment of this disclosure, the first lens 401 may have negative refractive power, the paraxial region of the object side of the first lens 401 may be planar, and the paraxial region of the image side of the first lens 401 may have a concave shape.

[0194] The second lens 402 may have positive refractive power, the paraxial region on the object side of the second lens 402 may have a convex shape, and the paraxial region on the image side of the second lens 402 may have a concave shape.

[0195] The third lens 403 may have positive refractive power, the paraxial region on the object side of the third lens 403 may have a convex shape, and the paraxial region on the image side of the third lens 403 may have a concave shape.

[0196] The fourth lens 404 may have positive refractive power, the paraxial region on the object side of the fourth lens 404 may have a convex shape, and the paraxial region on the image side of the fourth lens 404 may have a concave shape.

[0197] The fifth lens 405 may have positive refractive power, the paraxial region on the object side of the fifth lens 405 may have a convex shape, and the paraxial region on the image side of the fifth lens 405 may have a concave shape.

[0198] The sixth lens 406 can have positive refractive power, and the paraxial region on the object side and the paraxial region on the image side of the sixth lens 406 can each have a convex shape.

[0199] The seventh lens 407 may have negative refractive power, the paraxial region on the object side of the seventh lens 407 may have a concave shape, and the paraxial region on the image side of the seventh lens 407 may have a convex shape.

[0200] The eighth lens 408 can have negative refractive power, and the paraxial region on the object side and the paraxial region on the image side of the eighth lens 408 can each have a concave shape.

[0201] The ninth lens 409 may have negative refractive power, the paraxial region on the object side of the ninth lens 409 may have a convex shape, and the paraxial region on the image side of the ninth lens 409 may have a concave shape.

[0202] Furthermore, at least one of the object side and image side of at least one of the seventh lens 407 to the ninth lens 409 may have at least one inversion point.

[0203] The surface of each of the first lens 401 to the ninth lens 409 may have aspherical coefficients as shown in Table 8. For example, the object-side surface of the first lens 401 may be a spherical surface, and the image-side surface of the first lens 401 and the object-side and image-side surfaces of the second lens 402 to the ninth lens 409 may all be aspherical surfaces.

[0204] Table 8

[0205]

[0206]

[0207] Furthermore, the optical imaging system configured as described above can have, for example... Figure 8 The aberration characteristics shown are illustrated.

[0208] Reference Figure 9 and Figure 10 An optical imaging system 500 according to a fifth exemplary embodiment of the present disclosure is described.

[0209] An optical imaging system 500 according to a fifth exemplary embodiment of the present disclosure may include a first lens 501, a second lens 502, a third lens 503, a fourth lens 504, a fifth lens 505, a sixth lens 506, a seventh lens 507, an eighth lens 508, and a ninth lens 509, and may also include a filter F and an image sensor.

[0210] An optical imaging system 500 according to a fifth exemplary embodiment of the present disclosure can form a focal point on an imaging surface IP.

[0211] Table 9 shows the lens characteristics (radius of curvature, lens thickness or distance between lenses, refractive index, and Abbe number) for each lens.

[0212] Table 9

[0213] Face number radius of curvature Thickness or distance Refractive index Abbe number S1 First lens infinity 0.300 1.547 56.1 S2 5.106 0.100 S3 Second lens 1.661 0.763 1.547 56.1 S4 11.903 0.100 S5 Third lens 9.578 0.203 1.679 19.2 S6 5.022 0.100 S7 Fourth lens 7.981 0.292 1.537 55.7 S8 -19.078 0.382 S9 Fifth lens -186.643 0.408 1.620 26.0 S10 18.752 0.100 S11 Sixth lens -5.543 0.200 1.620 26.0 S12 -8.720 0.100 S13 Seventh Lens 6.667 0.360 1.571 37.4 S14 21.777 0.479 S15 Eighth lens 2.989 0.485 1.547 56.1 S16 4.063 1.084 S17 Ninth Lens 3.789 0.350 1.537 55.7 S18 -2.598 0.104 S19 Filter infinity 0.110 1.519 64.2 S20 infinity 0.124 S21 Imaging surface infinity

[0214] In the fifth exemplary embodiment of this disclosure, the first lens 501 may have negative refractive power, the paraxial region of the object side of the first lens 501 may be planar, and the paraxial region of the image side of the first lens 501 may have a concave shape.

[0215] The second lens 502 may have positive refractive power, the paraxial region on the object side of the second lens 502 may have a convex shape, and the paraxial region on the image side of the second lens 502 may have a concave shape.

[0216] The third lens 503 may have negative refractive power, the paraxial region on the object side of the third lens 503 may have a convex shape, and the paraxial region on the image side of the third lens 503 may have a concave shape.

[0217] The fourth lens 504 can have positive refractive power, and the paraxial region on the object side and the paraxial region on the image side of the fourth lens 504 can each have a convex shape.

[0218] The fifth lens 505 may have negative refractive power, and the paraxial region on the object side and the paraxial region on the image side of the fifth lens 505 may each have a concave shape.

[0219] The sixth lens 506 may have negative refractive power, the paraxial region on the object side of the sixth lens 506 may have a concave shape, and the paraxial region on the image side of the sixth lens 506 may have a convex shape.

[0220] The seventh lens 507 may have positive refractive power, the paraxial region on the object side of the seventh lens 507 may have a convex shape, and the paraxial region on the image side of the seventh lens 507 may have a concave shape.

[0221] The eighth lens 508 may have positive refractive power, the paraxial region on the object side of the eighth lens 508 may have a convex shape, and the paraxial region on the image side of the eighth lens 508 may have a concave shape.

[0222] The ninth lens 509 can have positive refractive power, and the paraxial region on the object side and the paraxial region on the image side of the ninth lens 509 can each have a convex shape.

[0223] Furthermore, at least one of the object side and image side of at least one of the seventh lens 507 to the ninth lens 509 may have at least one inversion point.

[0224] The surface of each of the first lens 501 to the ninth lens 509 may have aspherical coefficients as shown in Table 10. For example, the object-side surface of the first lens 501 may be a spherical surface, and the image-side surface of the first lens 501, as well as the object-side and image-side surfaces of the second lens 502 to the ninth lens 509, may all be aspherical surfaces.

[0225] Table 10

[0226]

[0227]

[0228]

[0229] Furthermore, the optical imaging system configured as described above can have, for example... Figure 10 The aberration characteristics shown are illustrated.

[0230] Reference Figure 11 and Figure 12 An optical imaging system 600 according to a sixth exemplary embodiment of the present disclosure is described.

[0231] An optical imaging system 600 according to a sixth exemplary embodiment of the present disclosure may include a first lens 601, a second lens 602, a third lens 603, a fourth lens 604, a fifth lens 605, a sixth lens 606, a seventh lens 607, an eighth lens 608, and a ninth lens 609, and may also include a filter F and an image sensor.

[0232] An optical imaging system 600 according to a sixth exemplary embodiment of the present disclosure can form a focal point on an imaging surface IP.

[0233] Table 11 shows the lens characteristics (radius of curvature, lens thickness or distance between lenses, refractive index, and Abbe number) for each lens.

[0234] Table 11

[0235]

[0236]

[0237] In the sixth exemplary embodiment of this disclosure, the first lens 601 may have negative refractive power, the paraxial region of the object side of the first lens 601 may be planar, and the paraxial region of the image side of the first lens 601 may have a concave shape.

[0238] The second lens 602 may have positive refractive power, the paraxial region on the object side of the second lens 602 may have a convex shape, and the paraxial region on the image side of the second lens 602 may have a concave shape.

[0239] The third lens 603 may have positive refractive power, the paraxial region on the object side of the third lens 603 may have a convex shape, and the paraxial region on the image side of the third lens 603 may have a concave shape.

[0240] The fourth lens 604 may have positive refractive power, the paraxial region on the object side of the fourth lens 604 may have a convex shape, and the paraxial region on the image side of the fourth lens 604 may have a concave shape.

[0241] The fifth lens 605 may have positive refractive power, the paraxial region on the object side of the fifth lens 605 may have a convex shape, and the paraxial region on the image side of the fifth lens 605 may have a concave shape.

[0242] The sixth lens 606 may have positive refractive power, the paraxial region on the object side of the sixth lens 606 may have a concave shape, and the paraxial region on the image side of the sixth lens 606 may have a convex shape.

[0243] The seventh lens 607 can have positive refractive power, and the paraxial regions of the object side and image side of the seventh lens 607 can each have a convex shape.

[0244] The eighth lens 608 can have negative refractive power, and the paraxial regions of the object side and image side of the eighth lens 608 can each have a concave shape.

[0245] The ninth lens 609 may have negative refractive power, the paraxial region on the object side of the ninth lens 609 may have a convex shape, and the paraxial region on the image side of the ninth lens 609 may have a concave shape.

[0246] Furthermore, at least one of the object side and image side of at least one of the seventh lens 607 to the ninth lens 609 may have at least one inversion point.

[0247] The surface of each of the first lens 601 to the ninth lens 609 may have aspheric coefficients as shown in Table 12. For example, the object-side surface of the first lens 601 may be a spherical surface, and the image-side surface of the first lens 601 and the object-side and image-side surfaces of the second lens 602 to the ninth lens 609 may both be aspherical.

[0248] Table 12

[0249]

[0250]

[0251] Furthermore, the optical imaging system configured as described above can have, for example... Figure 12 The aberration characteristics shown are illustrated.

[0252] Reference Figure 13 and Figure 14 An optical imaging system 700 according to a seventh exemplary embodiment of the present disclosure is described.

[0253] An optical imaging system 700 according to a seventh exemplary embodiment of the present disclosure may include a first lens 701, a second lens 702, a third lens 703, a fourth lens 704, a fifth lens 705, a sixth lens 706, a seventh lens 707, an eighth lens 708, a ninth lens 709, and a tenth lens 710, and may also include a filter F and an image sensor.

[0254] An optical imaging system 700 according to a seventh exemplary embodiment of the present disclosure can form a focal point on an imaging surface IP.

[0255] Table 13 shows the lens characteristics (radius of curvature, lens thickness or distance between lenses, refractive index, and Abbe number) for each lens.

[0256] Table 13

[0257] Face number radius of curvature Thickness or distance Refractive index Abbe number S1 First lens infinity 0.300 1.547 56.1 S2 8.000 0.050 S3 Second lens 2.001 0.697 1.547 56.1 S4 15.547 0.113 S5 Third lens 5.953 0.258 1.689 18.2 S6 3.410 0.135 S7 Fourth lens 6.098 0.380 1.537 55.7 S8 45.887 0.427 S9 Fifth lens 22.584 0.334 1.547 56.1 S10 12.693 0.124 S11 Sixth lens -6.433 0.200 1.646 23.5 S12 -10.502 0.111 S13 Seventh Lens 7.334 0.403 1.571 37.4 S14 20.766 0.229 S15 Eighth lens -7.893 0.200 1.646 23.5 S16 -12.548 0.100 S17 Ninth Lens 4.167 0.648 1.547 56.1 S18 -20.366 1.164 S19 Tenth Lens -179.464 0.208 1.537 55.7 S20 2.515 0.486 S21 Filter infinity 0.110 1.519 64.2 S22 infinity 0.147 S23 Imaging surface infinity

[0258] In the seventh exemplary embodiment of this disclosure, the first lens 701 may have negative refractive power, the paraxial region of the object side of the first lens 701 may be planar, and the paraxial region of the image side of the first lens 701 may have a concave shape.

[0259] The second lens 702 may have positive refractive power, the paraxial region on the object side of the second lens 702 may have a convex shape, and the paraxial region on the image side of the second lens 702 may have a concave shape.

[0260] The third lens 703 may have negative refractive power, the paraxial region on the object side of the third lens 703 may have a convex shape, and the paraxial region on the image side of the third lens 703 may have a concave shape.

[0261] The fourth lens 704 may have positive refractive power, the paraxial region on the object side of the fourth lens 704 may have a convex shape, and the paraxial region on the image side of the fourth lens 704 may have a concave shape.

[0262] The fifth lens 705 may have negative refractive power, the paraxial region on the object side of the fifth lens 705 may have a convex shape, and the paraxial region on the image side of the fifth lens 705 may have a concave shape.

[0263] The sixth lens 706 may have negative refractive power, the paraxial region on the object side of the sixth lens 706 may have a concave shape, and the paraxial region on the image side of the sixth lens 706 may have a convex shape.

[0264] The seventh lens 707 may have positive refractive power, the paraxial region on the object side of the seventh lens 707 may have a convex shape, and the paraxial region on the image side of the seventh lens 707 may have a concave shape.

[0265] The eighth lens 708 may have negative refractive power, the paraxial region on the object side of the eighth lens 708 may have a concave shape, and the paraxial region on the image side of the eighth lens 708 may have a convex shape.

[0266] The ninth lens 709 can have positive refractive power, and the paraxial regions of the object side and image side of the ninth lens 709 can each have a convex shape.

[0267] The tenth lens 710 can have negative refractive power, and the paraxial region on the object side and the paraxial region on the image side of the tenth lens 710 can each have a concave shape.

[0268] Furthermore, at least one of the object side and image side of at least one of the seventh lens 707 to the tenth lens 710 may have at least one inversion point.

[0269] The surface of each of the first lens 701 to the tenth lens 710 may have aspherical coefficients as shown in Table 14. For example, the object-side surface of the first lens 701 may be a spherical surface, and the image-side surface of the first lens 701 and the object-side and image-side surfaces of the second lenses 702 to the tenth lens 710 may all be aspherical surfaces.

[0270] Table 14

[0271]

[0272]

[0273]

[0274]

[0275] Furthermore, the optical imaging system configured as described above can have, for example... Figure 14 The aberration characteristics shown are illustrated.

[0276] Reference Figure 15 and Figure 16 An optical imaging system 800 according to an eighth exemplary embodiment of the present disclosure is described.

[0277] An optical imaging system 800 according to an eighth exemplary embodiment of the present disclosure may include a first lens 801, a second lens 802, a third lens 803, a fourth lens 804, a fifth lens 805, a sixth lens 806, and a seventh lens 807, and may also include a filter F and an image sensor.

[0278] An optical imaging system 800 according to an eighth exemplary embodiment of the present disclosure can form a focal point on an imaging surface IP.

[0279] Table 15 shows the lens characteristics (radius of curvature, lens thickness or distance between lenses, refractive index, and Abbe number) for each lens.

[0280] Table 15

[0281]

[0282]

[0283] In the eighth exemplary embodiment of this disclosure, the first lens 801 may have positive refractive power, the paraxial region of the object side of the first lens 801 may be planar, and the paraxial region of the image side of the first lens 801 may have a convex shape.

[0284] The second lens 802 may have positive refractive power, the paraxial region on the object side of the second lens 802 may have a convex shape, and the paraxial region on the image side of the second lens 802 may have a concave shape.

[0285] The third lens 803 may have negative refractive power, the paraxial region on the object side of the third lens 803 may have a convex shape, and the paraxial region on the image side of the third lens 803 may have a concave shape.

[0286] The fourth lens 804 may have positive refractive power, the paraxial region on the object side of the fourth lens 804 may have a convex shape, and the paraxial region on the image side of the fourth lens 804 may have a concave shape.

[0287] The fifth lens 805 may have negative refractive power, the paraxial region on the object side of the fifth lens 805 may have a convex shape, and the paraxial region on the image side of the fifth lens 805 may have a concave shape.

[0288] The sixth lens 806 can have positive refractive power, and the paraxial region on the object side and the paraxial region on the image side of the sixth lens 806 can each have a convex shape.

[0289] The seventh lens 807 can have negative refractive power, and the paraxial region on the object side and the paraxial region on the image side of the seventh lens 807 can each have a concave shape.

[0290] Furthermore, at least one of the object side and image side of at least one of the fourth lens 804 to the seventh lens 807 may have at least one inversion point.

[0291] The surface of each of the first lens 801 to the seventh lens 807 may have aspherical coefficients as shown in Table 16. For example, the object-side surface and the image-side surface of the first lens 801 may both be spherical surfaces, and the object-side surface and the image-side surface of the second lens 802 to the seventh lens 807 may both be aspherical surfaces.

[0292] Table 16

[0293]

[0294]

[0295] Furthermore, the optical imaging system configured as described above can have, for example... Figure 16 The aberration characteristics shown are illustrated.

[0296] Reference Figure 17 and Figure 18 An optical imaging system 900 according to a ninth exemplary embodiment of the present disclosure is described.

[0297] An optical imaging system 900 according to a ninth exemplary embodiment of the present disclosure may include a first lens 901, a second lens 902, a third lens 903, a fourth lens 904, a fifth lens 905, a sixth lens 906, and a seventh lens 907, and may also include a filter F and an image sensor.

[0298] An optical imaging system 900 according to a ninth exemplary embodiment of the present disclosure can form a focal point on an imaging surface IP.

[0299] Table 17 shows the lens characteristics (radius of curvature, lens thickness or distance between lenses, refractive index, and Abbe number) for each lens.

[0300] Table 17

[0301] Face number radius of curvature Thickness or distance Refractive index Abbe number S1 First lens infinity 0.300 1.546 56.1 S2 8.000 0.100 S3 Second lens 1.719 0.712 1.546 56.1 S4 16.432 0.101 S5 Third lens 7.466 0.204 1.678 19.2 S6 4.249 0.451 S7 Fourth lens 67.653 0.362 1.620 25.8 S8 -18.401 0.495 S9 Fifth lens 3.323 0.181 1.678 19.2 S10 2.674 0.298 S11 Sixth lens 4.410 0.681 1.546 56.1 S12 -3.316 0.701 S13 Seventh Lens -3.291 0.181 1.546 56.1 S14 2.663 0.182 S15 Filter infinity 0.110 1.518 64.2 S16 infinity 0.451 S17 Imaging surface infinity 0.020

[0302] In the ninth exemplary embodiment of this disclosure, the first lens 901 may have negative refractive power, the paraxial region of the object side of the first lens 901 may be planar, and the paraxial region of the image side of the first lens 901 may have a concave shape.

[0303] The second lens 902 may have positive refractive power, the paraxial region on the object side of the second lens 902 may have a convex shape, and the paraxial region on the image side of the second lens 902 may have a concave shape.

[0304] The third lens 903 may have negative refractive power, the paraxial region on the object side of the third lens 903 may have a convex shape, and the paraxial region on the image side of the third lens 903 may have a concave shape.

[0305] The fourth lens 904 can have positive refractive power, and the paraxial regions of the object side and image side of the fourth lens 904 can each have a convex shape.

[0306] The fifth lens 905 may have negative refractive power, the paraxial region on the object side of the fifth lens 905 may have a convex shape, and the paraxial region on the image side of the fifth lens 905 may have a concave shape.

[0307] The sixth lens 906 can have positive refractive power, and the paraxial regions of the object side and image side of the sixth lens 906 can each have a convex shape.

[0308] The seventh lens 907 can have negative refractive power, and the paraxial region on the object side and the paraxial region on the image side of the seventh lens 907 can each have a concave shape.

[0309] Furthermore, at least one of the object side and image side of at least one of the fourth lens 904 to the seventh lens 907 may have at least one inversion point.

[0310] The surface of each of the first lens 901 to the seventh lens 907 may have aspherical coefficients as shown in Table 18. For example, the object-side surface of the first lens 901 may be a spherical surface, and the image-side surface of the first lens 901 and the object-side and image-side surfaces of the second lens 902 to the seventh lens 907 may all be aspherical surfaces.

[0311] Table 18

[0312]

[0313]

[0314]

[0315] Furthermore, the optical imaging system configured as described above can have, for example... Figure 18 The aberration characteristics shown are illustrated.

[0316] Table 19 shows values ​​for optical imaging systems 100 to 900 according to the first to ninth exemplary embodiments of this disclosure, where f is the total focal length of the optical imaging system (the total focal length of the plurality of lenses used in the optical imaging system), f1 is the focal length of the first lens, f2 is the focal length of the second lens, f3 is the focal length of the third lens, f4 is the focal length of the fourth lens, f5 is the focal length of the fifth lens, f6 is the focal length of the sixth lens, f7 is the focal length of the seventh lens, f8 is the focal length of the eighth lens, f9 is the focal length of the ninth lens, and f10 is the focal length of the tenth lens.

[0317] Table 19

[0318]

[0319]

[0320] According to one or more exemplary embodiments of this disclosure, an optical imaging system can have high resolution while having reduced thickness.

[0321] 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 are to be understood in a descriptive sense only and not for limiting purposes. The description of features or aspects in each example should be considered applicable to similar features or aspects in other examples. Suitable results may still be achieved if the described techniques are performed in a different order, and / or if components in the described system, architecture, device, or circuit are combined in different ways and / or replaced or supplemented by other components or their equivalents. Therefore, the scope of this disclosure is not limited by the specific embodiments 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, characterized by, The optical imaging system includes: A plurality of lenses sequentially arranged from the object side to the imaging surface, wherein the plurality of lenses include a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens arranged in sequence, wherein the second lens has a positive refractive power, and where 0.9 < |(R1 + R2) / (R1 - R2)| < 1.1 and 0.4 < TTL / (2×IMG HT) < 0.65, where R1 is the radius of curvature of the object side surface of the first lens, R2 is the radius of curvature of the image side surface of the first lens, TTL is the distance on the optical axis from the object side surface of the first lens to the imaging surface, and IMG HT is half of the diagonal length of the imaging surface.

2. The optical imaging system of claim 1, wherein, |R1| > 500 mm is satisfied.

3. The optical imaging system of claim 1, wherein, The object side surface of the first lens is planar in its paraxial region.

4. The optical imaging system of claim 3, wherein, The object side surface of the first lens is a spherical surface.

5. The optical imaging system of claim 1, wherein, -35 < v1 - v2 ≤ 0 is satisfied, where v1 is the Abbe number of the first lens, and v2 is the Abbe number of the second lens.

6. The optical imaging system of claim 1, wherein, n2 + n3 > 3.15 is satisfied, where n2 is the refractive index of the second lens, and n3 is the refractive index of the third lens.

7. The optical imaging system of claim 1, wherein, 1.0 < TTL / f < 1.7 is satisfied, where f is the total focal length of the optical imaging system.

8. The optical imaging system of claim 1, wherein, -2.5 < f - TTL_2 < -0.2 is satisfied, where f is the total focal length of the optical imaging system, and TTL_2 is the distance on the optical axis from the object side surface of the second lens to the imaging surface.

9. The optical imaging system of claim 1, wherein, 0.05 < |f / f1| < 1.3 is satisfied, where f is the total focal length of the optical imaging system, and f1 is the focal length of the first lens.

10. The optical imaging system of claim 1, wherein, 0.001 < D1 / f < 0.04 is satisfied, where D1 is the distance on the optical axis between the image side surface of the first lens and the object side surface of the second lens, and f is the total focal length of the optical imaging system.

11. The optical imaging system of claim 1, wherein, 0.4 < f / f2 + f / f3 < 1.7 is satisfied, where f is the total focal length of the optical imaging system, f2 is the focal length of the second lens, and f3 is the focal length of the third lens.

12. The optical imaging system according to claim 1, wherein the seventh lens is the lens closest to the imaging surface, and the third lens has a negative refractive power, the fourth lens has a positive refractive power, and the fifth lens has a negative refractive power.

13. The optical imaging system of claim 1, wherein, The optical imaging system further includes: An eighth lens disposed between the seventh lens and the imaging surface, wherein each of the fourth lens and the sixth lens has a positive refractive power, and wherein the eighth lens has a negative refractive power.

14. The optical imaging system of claim 1, wherein, The optical imaging system further includes: An eighth lens and a ninth lens sequentially arranged between the seventh lens and the imaging surface, wherein the fourth lens has a positive refractive power.

15. The optical imaging system of claim 1, wherein, The optical imaging system further includes: An eighth lens, a ninth lens, and a tenth lens sequentially arranged between the seventh lens and the imaging surface, wherein the fourth lens has a positive refractive power, and wherein the tenth lens has a negative refractive power.

16. The optical imaging system of any one of claims 13 to 15, wherein, Among absolute values of focal lengths of the plurality of lenses, a focal length of the second lens has a smallest absolute value.

17. The optical imaging system of claim 1, wherein, When a number of lenses whose absolute values of focal lengths are greater than a total focal length of the optical imaging system is Nfa, and a number of the plurality of lenses is NL, Nfa>NL / 2 is satisfied.

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