Optical imaging system

Abstract

The present disclosure relates to an optical imaging system. The optical imaging system includes, in order from an object side of the optical imaging system toward an imaging plane along an optical axis, 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 has a positive refractive power, the second lens has a refractive power, the third lens has a refractive power, the fourth lens has a positive refractive power, the fifth lens has a refractive power, the sixth lens has a refractive power, the seventh lens has a refractive power, the eighth lens has a refractive power, and the ninth lens has a negative refractive power, and 0.90 < (TTL / (2×IMG HT))×Fno < 1.00 and 1.00 < f4 / f < 4.00 are satisfied, where TTL is a distance from an object side surface of the first lens to the imaging plane along the optical axis, IMG HT is half of a diagonal length of the imaging plane, Fno is an F number of the optical imaging system, f4 is a focal length of the fourth lens, and f is a focal length of the optical imaging system.

Description

[0001] Cross-references to related applications

[0002] This application claims the benefit of priority to Korean Patent Application No. 10-2025-0044253, filed on April 4, 2025, 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 optical imaging systems. Background Technology

[0004] Recent mobile devices may include cameras that include optical imaging systems with multiple lenses for video calls and taking pictures.

[0005] Furthermore, as the functionality of cameras in mobile devices increases, the demand for high-resolution mobile device cameras is also growing.

[0006] As mobile devices are designed to be smaller, the demand for thinner mobile device cameras is increasing. Therefore, there is a need to develop optical imaging systems that achieve high resolution while maintaining a smaller size. Summary of the Invention

[0007] The summary portion of this invention is intended to provide a brief overview of the chosen 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.

[0008] In one general aspect, the optical imaging system includes a first lens with positive refractive power, a second lens with refractive power, a third lens with refractive power, a fourth lens with positive refractive power, a fifth lens with refractive power, a sixth lens with refractive power, a seventh lens with refractive power, an eighth lens with refractive power, and a ninth lens with negative refractive power. The first to ninth lenses are arranged in ascending numerical order along the optical axis of the optical imaging system from the object side of the system towards the imaging surface, and satisfy 0.90 < (TTL / (2×IMG HT))×Fno < 1.00 and 1.00 < f4 / f < 4.00, where TTL is the distance along the optical axis from the object side of the first lens to the imaging surface, IMG HT is half the diagonal length of the imaging surface, Fno is the F-number of the optical imaging system, f4 is the focal length of the fourth lens, and f is the focal length of the optical imaging system.

[0009] Among the second and third lenses, the lens with negative refractive power can have a refractive index of 1.63 or greater.

[0010] The combined focal length of the first and second lenses can be positive.

[0011] The combined focal length of the first to third lenses can be positive.

[0012] The condition 0 < f1 / f < 5.00 can be satisfied, where f1 is the focal length of the first lens.

[0013] The conditional expression 0.80 < |f2 / f| < 2.20 can be satisfied, where f2 is the focal length of the second lens.

[0014] The conditional expression 0.80 < f12 / f < 1.50 can be satisfied, where f12 is the combined focal length of the first lens and the second lens.

[0015] The conditional expression 0.10 < |f12 / f3| < 0.70 can be satisfied, where f12 is the combined focal length of the first and second lenses, and f3 is the focal length of the third lens.

[0016] The conditional expression 1.10 < f123 / f < 1.70 can be satisfied, where f123 is the combined focal length of the first lens, the second lens, and the third lens.

[0017] The conditional expression -0.82 < f9 / f < 0 can be satisfied, where f9 is the focal length of the ninth lens.

[0018] It can satisfy the conditional expressions 75° < FOV×(IMG HT / f) < 82° and 0.55 < TTL / (2×IMG HT) < 0.65, where FOV is the field of view of the optical imaging system.

[0019] The conditional expression 1.00 < ∑CT / ∑AT < 2.00 can be satisfied, where ∑CT is the sum of the thicknesses of the first to ninth lenses along the optical axis, and ∑AT is the sum of the air gaps between adjacent lenses from the first to the ninth lens.

[0020] The conditional expression 0.90 < Td / f < 1.50 can be satisfied, where Td is the distance along the optical axis from the object side of the first lens to the image side of the ninth lens.

[0021] The conditional expression 0.15 < Yc92 / f < 0.50 can be satisfied, where Yc92 is the distance from the optical axis to the inflection point on the image side of the ninth lens in a direction perpendicular to the optical axis.

[0022] The object-side surface of the first lens may be convex in its paraxial region, and the image-side surface of the third lens may be concave in its paraxial region.

[0023] The object-side surface of each of the fourth to sixth lenses can be convex, and the image-side surface of each of the fourth to sixth lenses can be concave.

[0024] The condition 1.00 < |f3 / f| < 15.00 can be satisfied, where f3 is the focal length of the third lens.

[0025] The conditional expression 5.00 < TTL / BFL < 10 can be satisfied, where BFL is the distance along the optical axis from the image side of the ninth lens to the imaging plane.

[0026] The conditional expression 1.55 < Fno < 1.75 can be satisfied.

[0027] The conditional expression 0.20 < T14 / TTL < 0.31 can be satisfied, where T14 is the distance along the optical axis from the object-side surface of the first lens to the object-side surface of the fourth lens.

[0028] Other features and aspects will become apparent from the following detailed description and accompanying drawings. Attached Figure Description

[0029] Figure 1 This is a configuration diagram showing the optical imaging system according to the first embodiment.

[0030] Figure 2 It is shown Figure 1 The graph shows the aberration characteristics of the optical imaging system.

[0031] Figure 3 This is a configuration diagram showing an optical imaging system according to a second embodiment.

[0032] Figure 4 It is shown Figure 3 The graph shows the aberration characteristics of the optical imaging system.

[0033] Figure 5 This is a configuration diagram showing an optical imaging system according to a third embodiment.

[0034] Figure 6 It is shown Figure 5 The graph shows the aberration characteristics of the optical imaging system.

[0035] Figure 7 This is a configuration diagram showing an optical imaging system according to a fourth embodiment.

[0036] Figure 8 It is shown Figure 7 The graph shows the aberration characteristics of the optical imaging system.

[0037] Figure 9 This is a configuration diagram showing an optical imaging system according to a fifth embodiment.

[0038] Figure 10 It is shown Figure 9 The graph shows the aberration characteristics of the optical imaging system.

[0039] Figure 11 This is a configuration diagram showing an optical imaging system according to a sixth embodiment.

[0040] Figure 12 It is shown Figure 11 The graph shows the aberration characteristics of the optical imaging system.

[0041] Figure 13 This is a configuration diagram showing an optical imaging system according to the seventh embodiment.

[0042] Figure 14 It is shown Figure 13 The graph shows the aberration characteristics of the optical imaging system.

[0043] Figure 15 This is a configuration diagram showing the optical imaging system according to the eighth embodiment.

[0044] Figure 16 It is shown Figure 15 The graph shows the aberration characteristics of the optical imaging system.

[0045] Figure 17 This is a configuration diagram showing an optical imaging system according to the ninth embodiment.

[0046] Figure 18 It is shown Figure 17 The graph shows the aberration characteristics of the optical imaging system.

[0047] Figure 19 This is a configuration diagram showing an optical imaging system according to the tenth embodiment.

[0048] Figure 20 It is shown Figure 19 The graph shows the aberration characteristics of the optical imaging system.

[0049] Throughout the accompanying drawings and detailed embodiments, 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

[0050] The following detailed embodiments are provided to help the reader gain 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 the disclosure of this application. 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 the disclosure of this application. Furthermore, for clarity and conciseness, descriptions of features well-known in the art may be omitted.

[0051] The features described herein may be implemented in various 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, apparatus, and / or systems described herein will be apparent upon understanding the disclosure of this application.

[0052] 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.

[0053] As used herein, the term “and / or” includes any one of the associated listed items and any combination of any two or more items.

[0054] 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.

[0055] 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.

[0056] 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.

[0057] In the accompanying drawings, for ease of description, the thickness, size, and shape of the lens may be exaggerated, and the spherical or aspherical shape of the lens is merely an example and not a limitation thereof.

[0058] The optical imaging system according to the embodiment may include nine lenses.

[0059] The first lens can refer to the lens closest to the object side of the optical imaging system, and the ninth lens can refer to the lens closest to the imaging surface (or image sensor) of the optical imaging system.

[0060] In the embodiments, the values ​​of the lens's radius of curvature, thickness, distance, and focal length can be in millimeters (mm), and the field of view (FOV) of the optical imaging system can be in degrees (°).

[0061] In the description of the shape of a lens, declaring that the surface of the lens is convex means that the paraxial region of that surface is convex, and declaring that the surface of the lens is concave means that the paraxial region of that surface is concave.

[0062] Therefore, even when one surface of the lens is convex, the edge portion of that surface can be concave. Similarly, even when the surface of the lens is concave, the edge portion of that surface can be convex.

[0063] The paraxial region of a lens surface is a very narrow area surrounding the optical axis of the lens surface.

[0064] More specifically, the paraxial region of the lens surface is the central portion of the lens surface surrounding and including the optical axis of the lens surface. In the paraxial region, the light rays incident on the lens surface form a small angle θ with the optical axis, and the approximations sin θ ≈ θ, tan θ ≈ θ, and cos θ ≈ 1 are valid.

[0065] An imaging surface can refer to a virtual surface on which an optical imaging system focuses light. Alternatively, an imaging surface can refer to the surface of an image sensor on which light passing through the optical imaging system is received.

[0066] The optical imaging system according to the embodiment may include at least nine lenses.

[0067] For example, an optical imaging system according to an embodiment 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 in ascending numerical order along the optical axis of the optical imaging system from the object side of the optical imaging system toward the imaging surface of the optical imaging system. The first lens to the ninth lens may be spaced apart from each other by a predetermined distance along the optical axis.

[0068] The optical imaging system according to the embodiment may further include an image sensor for converting an image of an object incident on an image sensor through a first lens to a ninth lens into an electrical signal.

[0069] In addition, the optical imaging system may also include an infrared filter (hereinafter referred to as the "filter") for blocking infrared light. The filter may be positioned between the ninth lens and the image sensor.

[0070] In addition, the optical imaging system may include an aperture for adjusting the amount of light passing through the optical imaging system.

[0071] The first to ninth lenses included in the optical imaging system according to the embodiment may be made of plastic material.

[0072] Furthermore, at least one of the first to ninth lenses may have an aspherical surface. For example, each of the first to ninth lenses may have at least one aspherical surface.

[0073] In other words, the object-side surface and the image-side surface of each of the first to ninth lenses can be aspherical. The aspherical surfaces of the first to ninth lenses can be represented by the following Equation 1.

[0074] (1)

[0076] In Equation 1, c is the curvature of the lens surface and is equal to the reciprocal of the radius of curvature of the lens surface at the optical axis. K is the quadratic constant, and Y is the distance from any point on the aspherical surface of the lens to the optical axis. Furthermore, constants A to H, J, and L to P are aspherical surface coefficients. Z (also called sag) is the distance from a point on the aspherical surface of the lens at a distance Y from the optical axis to a tangent plane perpendicular to the optical axis and intersecting the vertex of the aspherical surface, in a direction parallel to the optical axis.

[0077] The optical imaging system according to the embodiment can satisfy any one or any combination of any two or more of the following conditional expressions 1 to 23.

[0078] 0.90 < (TTL / (2×IMG HT))×Fno < 1.00 (Conditional expression 1)

[0079] 0 < f1 / f < 5.00 (Conditional expression 2)

[0080] 0.80 < |f² / f| < 2.20 (Conditional expression 3)

[0081] 1.00 < |f3 / f| < 15.00 (Conditional expression 4)

[0082] 1.00 < f4 / f < 4.00 (Conditional expression 5)

[0083] -0.82 < f9 / f < 0 (Conditional expression 6)

[0084] 0.80 < f12 / f < 1.50 (Conditional expression 7)

[0085] 0.10 < |f12 / f3| < 0.70 (Conditional expression 8)

[0086] 1.10 < f123 / f < 1.70 (Conditional expression 9)

[0087] 1.00 < TTL / f < 1.50 (Conditional expression 10)

[0088] 5.00 < TTL / BFL < 10 (Conditional Expression 11)

[0089] 3.00 < ∑CT < 5.00 (Conditional expression 12)

[0090] 2.00 < ∑AT < 4.00 (Conditional expression 13)

[0091] 1.00 < ∑CT / ∑AT < 2.00 (Conditional expression 14)

[0092] 5.00 < Td < 10.00 (Conditional expression 15)

[0093] 0.90 < Td / f < 1.50 (Conditional expression 16)

[0094] 0.15 < Yc92 / f < 0.50 (Conditional expression 17)

[0095] 75° < FOV×(IMG HT / f) < 82° (Conditional expression 18)

[0096] 0.55 < TTL / (2×IMG HT) < 0.65 (Conditional Expression 19)

[0097] 1.55 < Fno < 1.75 (Conditional expression 20)

[0098] 18 < v6-v5 < 39 (Conditional expression 21)

[0099] 15 < |v6-v7| < 35 (conditional expression 22)

[0100] 0.20 < T14 / TTL < 0.31 (Conditional expression 23)

[0101] In this embodiment, the optical imaging system can satisfy 0.90 < (TTL / (2×IMG HT))×Fno < 1.00 (conditional expression 1). Here, TTL can be the distance along the optical axis from the object side of the first lens to the imaging plane, IMG HT can be half the diagonal length of the imaging plane, and Fno can be the F-number of the optical imaging system. Therefore, the optical imaging system can have a reduced size and can obtain a bright image.

[0102] In this embodiment, the optical imaging system can satisfy 0 < f1 / f < 5.00 (conditional expression 2), where f1 can be the focal length of the first lens, and f can be the focal length of the optical imaging system. Therefore, aberrations can be reduced by appropriately adjusting the refractive power of the first lens.

[0103] In this embodiment, the optical imaging system can satisfy 0.80 < |f2 / f| < 2.20 (conditional expression 3), where f2 can be the focal length of the second lens. Therefore, aberrations can be reduced by appropriately adjusting the refractive power of the second lens.

[0104] In this embodiment, the optical imaging system can satisfy 1.00 < |f3 / f| < 15.00 (conditional expression 4), where f3 can be the focal length of the third lens. Therefore, aberrations can be reduced by appropriately adjusting the refractive power of the third lens.

[0105] In this embodiment, the optical imaging system can satisfy 1.00 < f4 / f < 4.00 (conditional expression 5), where f4 can be the focal length of the fourth lens. Therefore, aberrations can be reduced by appropriately adjusting the refractive power of the fourth lens.

[0106] In this embodiment, the optical imaging system can satisfy -0.82 < f9 / f < 0 (conditional expression 6), where f9 can be the focal length of the ninth lens. Therefore, aberrations can be reduced by appropriately adjusting the refractive power of the ninth lens.

[0107] In this embodiment, the optical imaging system can satisfy 0.80 < f12 / f < 1.50 (condition expression 7), where f12 can be the combined focal length of the first and second lenses. Therefore, aberrations can be reduced by appropriately adjusting the refractive power of the first and second lenses.

[0108] In this embodiment, the optical imaging system can satisfy 0.10 < |f12 / f3| < 0.70 (conditional expression 8), where f3 can be the focal length of the third lens. Therefore, aberrations can be reduced by appropriately adjusting the refractive power of the first to third lenses.

[0109] In this embodiment, the optical imaging system can satisfy 1.10 < f123 / f < 1.70 (conditional expression 9), where f123 can be the combined focal length of the first lens, the second lens, and the third lens. Therefore, aberrations can be reduced by appropriately adjusting the refractive power of the first to the third lens.

[0110] In this embodiment, the optical imaging system can satisfy 1.00 < TTL / f < 1.50 (conditional expression 10). Therefore, the optical imaging system can achieve miniaturization while improving image resolution.

[0111] In this embodiment, the optical imaging system can satisfy 5.00 < TTL / BFL < 10 (conditional expression 11). Here, BFL can be the distance along the optical axis from the image-side surface of the ninth lens to the imaging plane. Therefore, the optical imaging system can be miniaturized and sufficient movement space can be ensured during autofocus.

[0112] In this embodiment, the optical imaging system can satisfy 3.00 < ∑CT < 5.00 (conditional expression 12). Here, ∑CT can be the sum of the thicknesses along the optical axis of the first to ninth lenses. Therefore, aberrations can be improved by optimizing the thickness of each lens.

[0113] In an embodiment, the optical imaging system can satisfy 2.00 < ∑AT < 4.00 (conditional expression 13), where ∑AT can be the sum of the air gaps between adjacent lenses from the first lens to the ninth lens. Therefore, aberrations can be improved by optimizing the air gaps between adjacent lenses from the first lens to the ninth lens.

[0114] In this embodiment, the optical imaging system can satisfy 1.00 < ∑CT / ∑AT < 2.00 (conditional expression 14). Therefore, aberrations can be improved by optimizing the thickness of each lens and the air gap between lenses.

[0115] In this embodiment, the optical imaging system can satisfy 5.00 < Td < 10.00 (conditional expression 15), where Td can be the distance along the optical axis from the object-side surface of the first lens to the image-side surface of the ninth lens. Therefore, the optical imaging system can be miniaturized.

[0116] In this embodiment, the optical imaging system can satisfy 0.90 < Td / f < 1.50 (conditional expression 16). Therefore, the optical imaging system can be miniaturized.

[0117] In this embodiment, the optical imaging system can satisfy 0.15 < Yc92 / f < 0.50 (conditional expression 17), where Yc92 can be the distance from the optical axis to the inflection point on the image-side surface of the ninth lens in a direction perpendicular to the optical axis. Therefore, aberrations can be improved by optimizing the position of the inflection point on the image-side surface of the ninth lens.

[0118] In this embodiment, the optical imaging system can satisfy 75° < FOV × (IMG HT / f) < 82° (conditional expression 18), where FOV can be the field of view of the optical imaging system. Therefore, image resolution can be improved.

[0119] In this embodiment, the optical imaging system can satisfy 0.55 < TTL / (2×IMG HT) < 0.65 (conditional expression 19). Therefore, the optical imaging system can achieve miniaturization while improving image resolution.

[0120] In this embodiment, the optical imaging system can satisfy 1.55 < Fno < 1.75 (conditional expression 20). Therefore, image brightness and image resolution can be improved.

[0121] In this embodiment, the optical imaging system can satisfy 18 < v6 - v5 < 39 (conditional expression 21). Here, v6 can be the Abbe number of the sixth lens, and v5 can be the Abbe number of the fifth lens. Therefore, chromatic aberration can be improved.

[0122] In this embodiment, the optical imaging system can satisfy 15 < |v6-v7| < 35 (conditional expression 22). Here, v7 can be the Abbe number of the seventh lens. Therefore, chromatic aberration can be improved.

[0123] In this embodiment, the optical imaging system can satisfy 0.20 < T14 / TTL < 0.31 (conditional expression 23). Here, T14 can be the distance along the optical axis from the object-side surface of the first lens to the object-side surface of the fourth lens. Therefore, the optical imaging system can be miniaturized.

[0124] In an embodiment, at least two of the first to fifth lenses may have a refractive index of 1.63 or greater. For example, the second or third lens may have a refractive index of 1.63 or greater, and the fifth lens may have a refractive index of 1.67 or greater.

[0125] Among the first to third lenses, at least one lens may have negative refractive power and a refractive index of 1.63 or greater. For example, among the second and third lenses, the lens with negative refractive power may have a refractive index of 1.63 or greater.

[0126] In an embodiment, the absolute value of the focal length of the ninth lens may be the smallest among the first to ninth lenses.

[0127] In an embodiment, the combined focal length of the first lens and the second lens can be a positive value.

[0128] In an embodiment, the combined focal length of the first to third lenses can be a positive value.

[0129] The optical imaging system can be configured to have a field of view greater than 80°. In an embodiment, the field of view of the optical imaging system can be less than 87°.

[0130] Figure 1 This is a configuration diagram showing the optical imaging system according to the first embodiment, and Figure 2 It is shown Figure 1 The graph shows the aberration characteristics of the optical imaging system.

[0131] Reference Figure 1The optical imaging system according to the first embodiment may 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 arranged in ascending numerical order along the optical axis of the optical imaging system from the object side of the optical imaging system toward the imaging surface IP of the optical imaging system, and may also include a filter IF disposed between the ninth lens 190 and the imaging surface IP.

[0132] The optical imaging system according to the first embodiment can form a focal point on the imaging surface IP. The imaging surface IP can be formed on an image sensor (not shown).

[0133] The characteristics of each element in an optical imaging system (radius of curvature, element thickness or distance between elements, refractive index, and Abbe number) are listed in Table 1 below.

[0134] Table 1

[0135] In the first embodiment, the first lens 110 may have positive refractive power, the object side of the first lens 110 may be convex in its paraxial region, and the image side of the first lens 110 may be concave in its paraxial region.

[0136] The second lens 120 may have positive refractive power, the object side of the second lens 120 may be convex in its paraxial region, and the image side of the second lens 120 may be concave in its paraxial region.

[0137] The third lens 130 may have negative refractive power, the object side of the third lens 130 may be convex in its paraxial region, and the image side of the third lens 130 may be concave in its paraxial region.

[0138] The fourth lens 140 may have positive refractive power, the object side of the fourth lens 140 may be convex in its paraxial region, and the image side of the fourth lens 140 may be concave in its paraxial region.

[0139] The fifth lens 150 may have negative refractive power, the object side of the fifth lens 150 may be convex in its paraxial region, and the image side of the fifth lens 150 may be concave in its paraxial region.

[0140] The sixth lens 160 may have negative refractive power, the object side of the sixth lens 160 may be convex in its paraxial region, and the image side of the sixth lens 160 may be concave in its paraxial region.

[0141] The seventh lens 170 can have negative refractive power, the object side of the seventh lens 170 can be concave in its paraxial region, and the image side of the seventh lens 170 can be convex in its paraxial region.

[0142] The eighth lens 180 may have positive refractive power, the object side of the eighth lens 180 may be convex in its paraxial region, and the image side of the eighth lens 180 may be concave in its paraxial region.

[0143] The ninth lens 190 may have negative refractive power, the object side of the ninth lens 190 may be convex in its paraxial region, and the image side of the ninth lens 190 may be concave in its paraxial region.

[0144] Furthermore, any one or any combination of two or more of the fifth lens 150, the sixth lens 160, the eighth lens 180, and the ninth lens 190 may have at least one inflection point on either or both of the object side and the image side.

[0145] Each surface of each of the first lens 110 to the ninth lens 190 may have aspherical coefficients as listed in Table 2 below. For example, the object-side surface and image-side surface of each of the first lens 110 to the ninth lens 190 may be aspherical.

[0146] Table 2

[0147] The optical imaging system configured as described above can have Figure 2 The aberration characteristics shown are illustrated.

[0148] Figure 3 This is a configuration diagram showing the optical imaging system according to the second embodiment, and Figure 4 It is shown Figure 3 The graph shows the aberration characteristics of the optical imaging system.

[0149] Reference Figure 3 The optical imaging system according to the second embodiment 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 arranged in ascending numerical order along the optical axis of the optical imaging system from the object side of the optical imaging system toward the imaging surface IP of the optical imaging system, and may also include a filter IF disposed between the ninth lens 290 and the imaging surface IP.

[0150] The optical imaging system according to the second embodiment can form a focal point on the imaging surface IP. The imaging surface IP can be formed on an image sensor (not shown).

[0151] The characteristics of each element in an optical imaging system (radius of curvature, element thickness or distance between elements, refractive index, and Abbe number) are listed in Table 3 below.

[0152] Table 3

[0153] In the second embodiment, the first lens 210 may have positive refractive power, the object side of the first lens 210 may be convex in its paraxial region, and the image side of the first lens 210 may be concave in its paraxial region.

[0154] The second lens 220 may have positive refractive power, the object side of the second lens 220 may be convex in its paraxial region, and the image side of the second lens 220 may be concave in its paraxial region.

[0155] The third lens 230 may have negative refractive power, the object side of the third lens 230 may be convex in its paraxial region, and the image side of the third lens 230 may be concave in its paraxial region.

[0156] The fourth lens 240 may have positive refractive power, the object side of the fourth lens 240 may be convex in its paraxial region, and the image side of the fourth lens 240 may be concave in its paraxial region.

[0157] The fifth lens 250 may have negative refractive power, the object side of the fifth lens 250 may be convex in its paraxial region, and the image side of the fifth lens 250 may be concave in its paraxial region.

[0158] The sixth lens 260 may have negative refractive power, the object side of the sixth lens 260 may be convex in its paraxial region, and the image side of the sixth lens 260 may be concave in its paraxial region.

[0159] The seventh lens 270 can have positive refractive power, the object side of the seventh lens 270 can be concave in its paraxial region, and the image side of the seventh lens 270 can be convex in its paraxial region.

[0160] The eighth lens 280 can have positive refractive power, the object side of the eighth lens 280 can be convex in its paraxial region, and the image side of the eighth lens 280 can be concave in its paraxial region.

[0161] The ninth lens 290 can have negative refractive power, and both the object side and the image side of the ninth lens 290 can be concave in their respective paraxial regions.

[0162] Furthermore, any one or any combination of two or more of the fifth lens 250, the sixth lens 260, the eighth lens 280, and the ninth lens 290 may have at least one inflection point on either or both of the object side and the image side.

[0163] Each surface of each of the first lens 210 to the ninth lens 290 may have aspherical coefficients as listed in Table 4 below. For example, the object-side surface and the image-side surface of each of the first lens 210 to the ninth lens 290 may be aspherical.

[0164] Table 4

[0165] The optical imaging system configured as described above can have Figure 4 The aberration characteristics shown are illustrated.

[0166] Figure 5 This is a configuration diagram showing an optical imaging system according to a third embodiment, and Figure 6 It is shown Figure 5 The graph shows the aberration characteristics of the optical imaging system.

[0167] Reference Figure 5 The optical imaging system according to the third embodiment 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 arranged in ascending numerical order along the optical axis of the optical imaging system from the object side of the optical imaging system toward the imaging surface IP of the optical imaging system, and may also include a filter IF disposed between the ninth lens 390 and the imaging surface IP.

[0168] The optical imaging system according to the third embodiment can form a focal point on the imaging surface IP. The imaging surface IP can be formed on an image sensor (not shown).

[0169] The characteristics of each element in an optical imaging system (radius of curvature, element thickness or distance between elements, refractive index, and Abbe number) are listed in Table 5 below.

[0170] Table 5

[0171] In the third embodiment, the first lens 310 may have positive refractive power, the object side of the first lens 310 may be convex in its paraxial region, and the image side of the first lens 310 may be concave in its paraxial region.

[0172] The second lens 320 may have positive refractive power, the object side of the second lens 320 may be convex in its paraxial region, and the image side of the second lens 320 may be concave in its paraxial region.

[0173] The third lens 330 may have negative refractive power, the object side of the third lens 330 may be convex in its paraxial region, and the image side of the third lens 330 may be concave in its paraxial region.

[0174] The fourth lens 340 may have positive refractive power, the object side of the fourth lens 340 may be convex in its paraxial region, and the image side of the fourth lens 340 may be concave in its paraxial region.

[0175] The fifth lens 350 can have negative refractive power, the object side of the fifth lens 350 can be convex in its paraxial region, and the image side of the fifth lens 350 can be concave in its paraxial region.

[0176] The sixth lens 360 can have positive refractive power, the object side of the sixth lens 360 can be convex in its paraxial region, and the image side of the sixth lens 360 can be concave in its paraxial region.

[0177] The seventh lens 370 can have positive refractive power, the object side of the seventh lens 370 can be concave in its paraxial region, and the image side of the seventh lens 370 can be convex in its paraxial region.

[0178] The eighth lens 380 can have positive refractive power, the object side of the eighth lens 380 can be convex in its paraxial region, and the image side of the eighth lens 380 can be concave in its paraxial region.

[0179] The ninth lens 390 can have negative refractive power, and the object side and image side of the ninth lens 390 can both be concave in their respective paraxial regions.

[0180] Furthermore, any one or any combination of two or more of the fifth lens 350, the sixth lens 360, the eighth lens 380, and the ninth lens 390 may have at least one inflection point on either or both of the object side and the image side.

[0181] Each surface of each of the first lens 310 to the ninth lens 390 may have aspherical coefficients as listed in Table 6 below. For example, the object-side surface and image-side surface of each of the first lens 310 to the ninth lens 390 may be aspherical.

[0182] Table 6

[0183] The optical imaging system configured as described above can have Figure 6 The aberration characteristics shown are illustrated.

[0184] Figure 7 This is a configuration diagram showing the optical imaging system according to the fourth embodiment, and Figure 8 It is shown Figure 7 The graph shows the aberration characteristics of the optical imaging system.

[0185] Reference Figure 7 The optical imaging system according to the fourth embodiment 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 arranged in ascending numerical order along the optical axis of the optical imaging system from the object side of the optical imaging system toward the imaging surface IP of the optical imaging system, and may also include a filter IF disposed between the ninth lens 490 and the imaging surface IP.

[0186] The optical imaging system according to the fourth embodiment can form a focal point on the imaging surface IP. The imaging surface IP can be formed on an image sensor (not shown).

[0187] The characteristics of each element in an optical imaging system (radius of curvature, element thickness or distance between elements, refractive index, and Abbe number) are listed in Table 7 below.

[0188] Table 7

[0189] In the fourth embodiment, the first lens 410 may have positive refractive power, the object side of the first lens 410 may be convex in its paraxial region, and the image side of the first lens 410 may be concave in its paraxial region.

[0190] The second lens 420 may have positive refractive power, the object side of the second lens 420 may be convex in its paraxial region, and the image side of the second lens 420 may be concave in its paraxial region.

[0191] The third lens 430 may have negative refractive power, the object side of the third lens 430 may be convex in its paraxial region, and the image side of the third lens 430 may be concave in its paraxial region.

[0192] The fourth lens 440 may have positive refractive power, the object side of the fourth lens 440 may be convex in its paraxial region, and the image side of the fourth lens 440 may be concave in its paraxial region.

[0193] The fifth lens 450 may have negative refractive power, the object side of the fifth lens 450 may be convex in its paraxial region, and the image side of the fifth lens 450 may be concave in its paraxial region.

[0194] The sixth lens 460 can have positive refractive power, the object side of the sixth lens 460 can be convex in its paraxial region, and the image side of the sixth lens 460 can be concave in its paraxial region.

[0195] The seventh lens 470 can have negative refractive power, the object side of the seventh lens 470 can be concave in its paraxial region, and the image side of the seventh lens 470 can be convex in its paraxial region.

[0196] The eighth lens 480 can have positive refractive power, the object side of the eighth lens 480 can be convex in its paraxial region, and the image side of the eighth lens 480 can be concave in its paraxial region.

[0197] The ninth lens 490 can have negative refractive power, and both the object side and the image side of the ninth lens 490 can be concave in their respective paraxial regions.

[0198] Furthermore, any one or any combination of two or more of the fifth lens 450, the sixth lens 460, the eighth lens 480, and the ninth lens 490 may have at least one inflection point on either or both of the object side and the image side.

[0199] Each surface of each of the first lens 410 to the ninth lens 490 may have aspherical coefficients as listed in Table 8 below. For example, the object-side surface and image-side surface of each of the first lens 410 to the ninth lens 490 may be aspherical.

[0200] Table 8

[0201] The optical imaging system configured as described above can have Figure 8 The aberration characteristics shown are illustrated.

[0202] Figure 9 This is a configuration diagram showing the optical imaging system according to the fifth embodiment, and Figure 10 It is shown Figure 9 The graph shows the aberration characteristics of the optical imaging system.

[0203] Reference Figure 9 The optical imaging system according to the fifth embodiment 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 arranged in ascending numerical order along the optical axis of the optical imaging system from the object side of the optical imaging system toward the imaging surface IP of the optical imaging system, and may also include a filter IF disposed between the ninth lens 590 and the imaging surface IP.

[0204] The optical imaging system according to the fifth embodiment can form a focal point on the imaging surface IP. The imaging surface IP can be formed on an image sensor (not shown).

[0205] The characteristics of each element in an optical imaging system (radius of curvature, element thickness or distance between elements, refractive index, and Abbe number) are listed in Table 9 below.

[0206] Table 9

[0207] In the fifth embodiment, the first lens 510 may have positive refractive power, the object side of the first lens 510 may be convex in its paraxial region, and the image side of the first lens 510 may be concave in its paraxial region.

[0208] The second lens 520 may have positive refractive power, and the object side and image side of the second lens 520 may both be convex in their respective paraxial regions.

[0209] The third lens 530 may have negative refractive power, the object side of the third lens 530 may be convex in its paraxial region, and the image side of the third lens 530 may be concave in its paraxial region.

[0210] The fourth lens 540 may have positive refractive power, the object side of the fourth lens 540 may be convex in its paraxial region, and the image side of the fourth lens 540 may be concave in its paraxial region.

[0211] The fifth lens 550 can have positive refractive power, the object side of the fifth lens 550 can be convex in its paraxial region, and the image side of the fifth lens 550 can be concave in its paraxial region.

[0212] The sixth lens 560 may have positive refractive power, the object side of the sixth lens 560 may be convex in its paraxial region, and the image side of the sixth lens 560 may be concave in its paraxial region.

[0213] The seventh lens 570 can have negative refractive power, the object side of the seventh lens 570 can be concave in its paraxial region, and the image side of the seventh lens 570 can be convex in its paraxial region.

[0214] The eighth lens 580 can have positive refractive power, the object side of the eighth lens 580 can be convex in its paraxial region, and the image side of the eighth lens 580 can be concave in its paraxial region.

[0215] The ninth lens 590 can have negative refractive power, and the object side and image side of the ninth lens 590 can both be concave in their respective paraxial regions.

[0216] Furthermore, any one or any combination of two or more of the fifth lens 550, the sixth lens 560, the eighth lens 580, and the ninth lens 590 may have at least one inflection point on either or both of the object side and the image side.

[0217] Each surface of each of the first lens 510 to the ninth lens 590 may have aspherical coefficients as listed in Table 10 below. For example, the object-side surface and the image-side surface of each of the first lens 510 to the ninth lens 590 may be aspherical.

[0218] Table 10

[0219] The optical imaging system configured as described above can have Figure 10 The aberration characteristics shown are illustrated.

[0220] Figure 11 This is a configuration diagram showing the optical imaging system according to the sixth embodiment, and Figure 12 It is shown Figure 11 The graph shows the aberration characteristics of the optical imaging system.

[0221] Reference Figure 11The optical imaging system according to the sixth embodiment 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 arranged in ascending numerical order along the optical axis of the optical imaging system from the object side of the optical imaging system toward the imaging surface IP of the optical imaging system, and may also include a filter IF disposed between the ninth lens 690 and the imaging surface IP.

[0222] The optical imaging system according to the sixth embodiment can form a focal point on the imaging surface IP. The imaging surface IP can be formed on an image sensor (not shown).

[0223] The characteristics of each element in an optical imaging system (radius of curvature, element thickness or distance between elements, refractive index, and Abbe number) are listed in Table 11 below.

[0224] Table 11

[0225] In the sixth embodiment, the first lens 610 may have positive refractive power, the object side of the first lens 610 may be convex in its paraxial region, and the image side of the first lens 610 may be concave in its paraxial region.

[0226] The second lens 620 may have negative refractive power, the object side of the second lens 620 may be convex in its paraxial region, and the image side of the second lens 620 may be concave in its paraxial region.

[0227] The third lens 630 may have positive refractive power, the object side of the third lens 630 may be convex in its paraxial region, and the image side of the third lens 630 may be concave in its paraxial region.

[0228] The fourth lens 640 may have positive refractive power, the object side of the fourth lens 640 may be convex in its paraxial region, and the image side of the fourth lens 640 may be concave in its paraxial region.

[0229] The fifth lens 650 may have negative refractive power, the object side of the fifth lens 650 may be convex in its paraxial region, and the image side of the fifth lens 650 may be concave in its paraxial region.

[0230] The sixth lens 660 may have negative refractive power, the object side of the sixth lens 660 may be convex in its paraxial region, and the image side of the sixth lens 660 may be concave in its paraxial region.

[0231] The seventh lens 670 can have positive refractive power, and both the object side and the image side of the seventh lens 670 can be convex in their respective paraxial regions.

[0232] The eighth lens 680 can have negative refractive power, the object side of the eighth lens 680 can be concave in its paraxial region, and the image side of the eighth lens 680 can be convex in its paraxial region.

[0233] The ninth lens 690 can have negative refractive power, the object side of the ninth lens 690 can be convex in its paraxial region, and the image side of the ninth lens 690 can be concave in its paraxial region.

[0234] Furthermore, any one or any combination of two or more of the fifth lens 650, the sixth lens 660, the eighth lens 680, and the ninth lens 690 may have at least one inflection point on either or both of the object side and the image side.

[0235] Each surface of each of the first lens 610 to the ninth lens 690 may have aspherical coefficients as listed in Table 12 below. For example, the object-side surface and image-side surface of each of the first lens 610 to the ninth lens 690 may be aspherical.

[0236] Table 12

[0237] The optical imaging system configured as described above can have Figure 12 The aberration characteristics shown are illustrated.

[0238] Figure 13 This is a configuration diagram showing the optical imaging system according to the seventh embodiment, and Figure 14 It is shown Figure 13 The graph shows the aberration characteristics of the optical imaging system.

[0239] Reference Figure 13 The optical imaging system according to the seventh embodiment 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 arranged in ascending numerical order along the optical axis of the optical imaging system from the object side of the optical imaging system toward the imaging surface IP of the optical imaging system, and may also include a filter IF disposed between the ninth lens 790 and the imaging surface IP.

[0240] The optical imaging system according to the seventh embodiment can form a focal point on the imaging surface IP. The imaging surface IP can be formed on an image sensor (not shown).

[0241] The characteristics of each element in an optical imaging system (radius of curvature, element thickness or distance between elements, refractive index, and Abbe number) are listed in Table 13 below.

[0242] Table 13

[0243] In the seventh embodiment, the first lens 710 may have positive refractive power, the object side of the first lens 710 may be convex in its paraxial region, and the image side of the first lens 710 may be concave in its paraxial region.

[0244] The second lens 720 may have negative refractive power, the object side of the second lens 720 may be convex in its paraxial region, and the image side of the second lens 720 may be concave in its paraxial region.

[0245] The third lens 730 may have positive refractive power, the object side of the third lens 730 may be convex in its paraxial region, and the image side of the third lens 730 may be concave in its paraxial region.

[0246] The fourth lens 740 can have positive refractive power, the object side of the fourth lens 740 can be convex in its paraxial region, and the image side of the fourth lens 740 can be concave in its paraxial region.

[0247] The fifth lens 750 can have negative refractive power, the object side of the fifth lens 750 can be convex in its paraxial region, and the image side of the fifth lens 750 can be concave in its paraxial region.

[0248] The sixth lens 760 can have positive refractive power, the object side of the sixth lens 760 can be convex in its paraxial region, and the image side of the sixth lens 760 can be concave in its paraxial region.

[0249] The seventh lens 770 can have positive refractive power, and both the object side and the image side of the seventh lens 770 can be convex in their respective paraxial regions.

[0250] The eighth lens 780 can have negative refractive power, the object side of the eighth lens 780 can be concave in its paraxial region, and the image side of the eighth lens 780 can be convex in its paraxial region.

[0251] The ninth lens 790 can have negative refractive power, the object side of the ninth lens 790 can be convex in its paraxial region, and the image side of the ninth lens 790 can be concave in its paraxial region.

[0252] Furthermore, any one or any combination of two or more of the fifth lens 750, the sixth lens 760, the eighth lens 780, and the ninth lens 790 may have at least one inflection point on either or both of the object side and the image side.

[0253] Each surface of each of the first lens 710 to the ninth lens 790 may have aspherical coefficients as listed in Table 14 below. For example, the object-side surface and image-side surface of each of the first lens 710 to the ninth lens 790 may be aspherical.

[0254] Table 14

[0255] The optical imaging system configured as described above can have Figure 14 The aberration characteristics shown are illustrated.

[0256] Figure 15 This is a configuration diagram showing the optical imaging system according to the eighth embodiment, and Figure 16 It is shown Figure 15 The graph shows the aberration characteristics of the optical imaging system.

[0257] Reference Figure 15 The optical imaging system according to the eighth embodiment may include a first lens 810, a second lens 820, a third lens 830, a fourth lens 840, a fifth lens 850, a sixth lens 860, a seventh lens 870, an eighth lens 880, and a ninth lens 890 arranged in ascending numerical order along the optical axis of the optical imaging system from the object side of the optical imaging system toward the imaging surface IP of the optical imaging system, and may also include a filter IF disposed between the ninth lens 890 and the imaging surface IP.

[0258] The optical imaging system according to the eighth embodiment can form a focal point on the imaging surface IP. The imaging surface IP can be formed on an image sensor (not shown).

[0259] The characteristics of each element in an optical imaging system (radius of curvature, element thickness or distance between elements, refractive index, and Abbe number) are listed in Table 15 below.

[0260] Table 15

[0261] In the eighth embodiment, the first lens 810 may have positive refractive power, the object side of the first lens 810 may be convex in its paraxial region, and the image side of the first lens 810 may be concave in its paraxial region.

[0262] The second lens 820 may have negative refractive power, the object side of the second lens 820 may be convex in its paraxial region, and the image side of the second lens 820 may be concave in its paraxial region.

[0263] The third lens 830 can have positive refractive power, the object side of the third lens 830 can be convex in its paraxial region, and the image side of the third lens 830 can be concave in its paraxial region.

[0264] The fourth lens 840 can have positive refractive power, the object side of the fourth lens 840 can be convex in its paraxial region, and the image side of the fourth lens 840 can be concave in its paraxial region.

[0265] The fifth lens 850 can have negative refractive power, the object side of the fifth lens 850 can be convex in its paraxial region, and the image side of the fifth lens 850 can be concave in its paraxial region.

[0266] The sixth lens 860 can have positive refractive power, the object side of the sixth lens 860 can be convex in its paraxial region, and the image side of the sixth lens 860 can be concave in its paraxial region.

[0267] The seventh lens 870 can have positive refractive power, and both the object side and the image side of the seventh lens 870 can be convex in their respective paraxial regions.

[0268] The eighth lens 880 can have positive refractive power, the object side of the eighth lens 880 can be concave in its paraxial region, and the image side of the eighth lens 880 can be convex in its paraxial region.

[0269] The ninth lens 890 can have negative refractive power, the object side of the ninth lens 890 can be convex in its paraxial region, and the image side of the ninth lens 890 can be concave in its paraxial region.

[0270] Furthermore, any one or any combination of two or more of the fifth lens 850, the sixth lens 860, the eighth lens 880, and the ninth lens 890 may have at least one inflection point on either or both of the object side and the image side.

[0271] Each surface of each of the first lens 810 to the ninth lens 890 may have aspherical coefficients as listed in Table 16 below. For example, the object-side surface and the image-side surface of each of the first lens 810 to the ninth lens 890 may be aspherical.

[0272] Table 16

[0273] The optical imaging system configured as described above can have Figure 16 The aberration characteristics shown are illustrated.

[0274] Figure 17 This is a configuration diagram showing the optical imaging system according to the ninth embodiment, and Figure 18 It is shown Figure 17 The graph shows the aberration characteristics of the optical imaging system.

[0275] Reference Figure 17 The optical imaging system according to the ninth embodiment may include a first lens 910, a second lens 920, a third lens 930, a fourth lens 940, a fifth lens 950, a sixth lens 960, a seventh lens 970, an eighth lens 980, and a ninth lens 990 arranged in ascending numerical order along the optical axis of the optical imaging system from the object side of the optical imaging system toward the imaging surface IP of the optical imaging system, and may also include a filter IF disposed between the ninth lens 990 and the imaging surface IP.

[0276] The optical imaging system according to the ninth embodiment can form a focal point on the imaging surface IP. The imaging surface IP can be formed on an image sensor (not shown).

[0277] The characteristics of each element in an optical imaging system (radius of curvature, element thickness or distance between elements, refractive index, and Abbe number) are listed in Table 17 below.

[0278] Table 17

[0279] In the ninth embodiment, the first lens 910 may have positive refractive power, the object side of the first lens 910 may be convex in its paraxial region, and the image side of the first lens 910 may be concave in its paraxial region.

[0280] The second lens 920 may have negative refractive power, the object side of the second lens 920 may be convex in its paraxial region, and the image side of the second lens 920 may be concave in its paraxial region.

[0281] The third lens 930 can have positive refractive power, the object side of the third lens 930 can be convex in its paraxial region, and the image side of the third lens 930 can be concave in its paraxial region.

[0282] The fourth lens 940 can have positive refractive power, the object side of the fourth lens 940 can be convex in its paraxial region, and the image side of the fourth lens 940 can be concave in its paraxial region.

[0283] The fifth lens 950 can have positive refractive power, the object side of the fifth lens 950 can be convex in its paraxial region, and the image side of the fifth lens 950 can be concave in its paraxial region.

[0284] The sixth lens 960 can have positive refractive power, the object side of the sixth lens 960 can be convex in its paraxial region, and the image side of the sixth lens 960 can be concave in its paraxial region.

[0285] The seventh lens 970 can have positive refractive power, and both the object side and the image side of the seventh lens 970 can be convex in their respective paraxial regions.

[0286] The eighth lens 980 can have positive refractive power, the object side of the eighth lens 980 can be concave in its paraxial region, and the image side of the eighth lens 980 can be convex in its paraxial region.

[0287] The ninth lens 990 can have negative refractive power, the object side of the ninth lens 990 can be convex in its paraxial region, and the image side of the ninth lens 990 can be concave in its paraxial region.

[0288] Furthermore, any one or any combination of two or more of the fifth lens 950, the sixth lens 960, the eighth lens 980, and the ninth lens 990 may have at least one inflection point on either or both of the object side and the image side.

[0289] Each surface of each of the first lens 910 to the ninth lens 990 may have aspherical coefficients as listed in Table 18 below. For example, the object-side surface and image-side surface of each of the first lens 910 to the ninth lens 990 may be aspherical.

[0290] Table 18

[0291] The optical imaging system configured as described above can have Figure 18 The aberration characteristics shown are illustrated.

[0292] Figure 19 This is a configuration diagram showing an optical imaging system according to the tenth embodiment, and Figure 20 It is shown Figure 19 The graph shows the aberration characteristics of the optical imaging system.

[0293] Reference Figure 19 The optical imaging system according to the tenth embodiment may include a first lens 1010, a second lens 1020, a third lens 1030, a fourth lens 1040, a fifth lens 1050, a sixth lens 1060, a seventh lens 1070, an eighth lens 1080, and a ninth lens 1090 arranged in ascending numerical order along the optical axis of the optical imaging system from the object side of the optical imaging system toward the imaging surface IP of the optical imaging system, and may also include a filter IF disposed between the ninth lens 1090 and the imaging surface IP.

[0294] The optical imaging system according to the tenth embodiment can form a focal point on the imaging surface IP. The imaging surface IP can be formed on an image sensor (not shown).

[0295] The characteristics of each element in an optical imaging system (radius of curvature, element thickness or distance between elements, refractive index, and Abbe number) are listed in Table 19 below.

[0296] Table 19

[0297] In the tenth embodiment, the first lens 1010 may have positive refractive power, the object side of the first lens 1010 may be convex in its paraxial region, and the image side of the first lens 1010 may be concave in its paraxial region.

[0298] The second lens 1020 may have negative refractive power, the object side of the second lens 1020 may be convex in its paraxial region, and the image side of the second lens 1020 may be concave in its paraxial region.

[0299] The third lens 1030 may have positive refractive power, the object side of the third lens 1030 may be convex in its paraxial region, and the image side of the third lens 1030 may be concave in its paraxial region.

[0300] The fourth lens 1040 may have positive refractive power, the object side of the fourth lens 1040 may be convex in its paraxial region, and the image side of the fourth lens 1040 may be concave in its paraxial region.

[0301] The fifth lens 1050 can have positive refractive power, the object side of the fifth lens 1050 can be convex in its paraxial region, and the image side of the fifth lens 1050 can be concave in its paraxial region.

[0302] The sixth lens 1060 may have negative refractive power, the object side of the sixth lens 1060 may be convex in its paraxial region, and the image side of the sixth lens 1060 may be concave in its paraxial region.

[0303] The seventh lens 1070 can have positive refractive power, and the object side and image side of the seventh lens 1070 can both be convex in their respective paraxial regions.

[0304] The eighth lens 1080 can have positive refractive power, the object side of the eighth lens 1080 can be concave in its paraxial region, and the image side of the eighth lens 1080 can be convex in its paraxial region.

[0305] The ninth lens 1090 may have negative refractive power, the object side of the ninth lens 1090 may be convex in its paraxial region, and the image side of the ninth lens 1090 may be concave in its paraxial region.

[0306] Furthermore, any one or any combination of two or more of the fifth lens 1050, the sixth lens 1060, the eighth lens 1080, and the ninth lens 1090 may have at least one inflection point on either or both of the object side and the image side.

[0307] Each surface of each of the first lens 1010 to the ninth lens 1090 may have aspherical coefficients as listed in Table 20 below. For example, the object-side surface and image-side surface of each of the first lens 1010 to the ninth lens 1090 may be aspherical.

[0308] Table 20

[0309] The optical imaging system configured as described above can have Figure 20 The aberration characteristics shown are illustrated.

[0310] Table 21 below lists the values ​​of the properties of the optical imaging systems according to the first to tenth embodiments. In Table 21, f5 can be the focal length of the fifth lens, f6 can be the focal length of the sixth lens, f7 can be the focal length of the seventh lens, f8 can be the focal length of the eighth lens, and EPD can be the entrance pupil diameter of the optical imaging system.

[0311] Table 21

[0312] Table 22 below lists the values ​​of conditional expressions 1 to 23 for the optical imaging systems according to the first to tenth embodiments.

[0313] Table 22

[0314] According to the above embodiments, the optical imaging system can have a reduced size and high resolution.

[0315] While this disclosure includes specific embodiments, it will be apparent upon understanding the disclosure of this application that various changes in form and detail may be made to these embodiments without departing from the spirit and scope of the claims and their equivalents. The description of features or aspects in each embodiment should be considered applicable to similar features or aspects in other embodiments. 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, including: The first lens has positive refractive power; The second lens has refractive power; The third lens has refractive power; The fourth lens has positive refractive power; The fifth lens has refractive power; The sixth lens has refractive power; The seventh lens has refractive power; The eighth lens has refractive power; as well as The ninth lens has negative refractive power. Wherein, the first lens to the ninth lens are arranged in ascending numerical order along the optical axis of the optical imaging system from the object side of the optical imaging system toward the imaging surface of the optical imaging system, and The following conditions must be met: 0.90 < (TTL / (2×IMG HT))×Fno < 1.00 and 1.00 < f4 / f < 4.00, where TTL is the distance along the optical axis from the object side of the first lens to the imaging plane, IMG HT is half the diagonal length of the imaging plane, Fno is the F-number of the optical imaging system, f4 is the focal length of the fourth lens, and f is the focal length of the optical imaging system.

2. The optical imaging system according to claim 1, wherein, Of the second and third lenses, the lens with negative refractive power has a refractive index of 1.63 or greater.

3. The optical imaging system according to claim 1, wherein, The combined focal length of the first lens and the second lens has a positive value.

4. The optical imaging system according to claim 1, wherein, The combined focal length of the first lens to the third lens has a positive value.

5. The optical imaging system according to claim 1, wherein, The condition 0 < f1 / f < 5.00 is satisfied, where f1 is the focal length of the first lens.

6. The optical imaging system according to claim 1, wherein, It satisfies 0.80 < |f2 / f| < 2.20, where f2 is the focal length of the second lens.

7. The optical imaging system according to claim 1, wherein, The condition 0.80 < f12 / f < 1.50 is satisfied, where f12 is the combined focal length of the first lens and the second lens.

8. The optical imaging system according to claim 1, wherein, The condition 0.10 < |f12 / f3| < 0.70 is satisfied, where f12 is the combined focal length of the first lens and the second lens, and f3 is the focal length of the third lens.

9. The optical imaging system according to claim 1, wherein, The following condition must be met: 1.10 < f123 / f < 1.70, where f123 is the combined focal length of the first lens, the second lens, and the third lens.

10. The optical imaging system according to claim 1, wherein, It satisfies -0.82 < f9 / f < 0, where f9 is the focal length of the ninth lens.

11. The optical imaging system according to claim 1, wherein, It satisfies 75° < FOV×(IMG HT / f) < 82° and 0.55 < TTL / (2×IMG HT) < 0.65, where FOV is the field of view of the optical imaging system.

12. The optical imaging system according to claim 1, wherein, 1.00 < ∑CT / ∑AT < 2.00, where ∑CT is the sum of the thicknesses of the first lens to the ninth lens along the optical axis, and ∑AT is the sum of the air gaps between adjacent lenses from the first lens to the ninth lens.

13. The optical imaging system according to claim 1, wherein, The condition 0.90 < Td / f < 1.50 is satisfied, where Td is the distance along the optical axis from the object-side surface of the first lens to the image-side surface of the ninth lens.

14. The optical imaging system according to claim 1, wherein, The condition 0.15 < Yc92 / f < 0.50 is satisfied, where Yc92 is the distance from the optical axis to the inflection point on the image side of the ninth lens in a direction perpendicular to the optical axis.

15. The optical imaging system according to claim 1, wherein, The object-side surface of the first lens is convex in its paraxial region, and the image-side surface of the third lens is concave in its paraxial region.

16. The optical imaging system according to claim 15, wherein, The object-side surface of each of the fourth to sixth lenses is convex, and the image-side surface of each of the fourth to sixth lenses is concave.

17. The optical imaging system according to claim 1, wherein, 1.00 < |f3 / f| < 15.00, where f3 is the focal length of the third lens.

18. The optical imaging system according to claim 1, wherein, The condition 5.00 < TTL / BFL < 10 is satisfied, where BFL is the distance along the optical axis from the image-side surface of the ninth lens to the imaging surface.

19. The optical imaging system according to claim 1, wherein, It satisfies 1.55 < Fno < 1.

75.

20. The optical imaging system according to claim 1, wherein, The condition 0.20 < T14 / TTL < 0.31 is satisfied, where T14 is the distance along the optical axis from the object-side surface of the first lens to the object-side surface of the fourth lens.

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