Optical imaging system

Abstract

The optical imaging system includes: a first lens having positive refractive power; a second lens having a concave object-side surface in its paraxial region; a third lens having positive refractive power; a fourth lens having negative refractive power; a fifth lens having refractive power; and a sixth lens having a concave image-side surface in its paraxial region. The first to sixth lenses are arranged sequentially along the optical axis of the optical imaging system from the object side toward the imaging surface of the optical imaging system, and satisfy the condition 0.6 ≤ CT1 / d2 ≤ 1.4, where CT1 is the thickness of the first lens along the optical axis, and d2 is the air gap between the second and third lenses along the optical axis.

Description

[0001] Cross-references to related applications

[0002] This application claims the benefit of priority to Korean Patent Application No. 10-2024-0201614, filed on December 31, 2024, 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] Recently, in the mobile camera market, high-magnification telephoto cameras have adopted a folding system on the front side of the lens that bends the path of light.

[0005] To obtain high-quality images in high magnification mode, a large image sensor and a large-diameter lens suitable for the image sensor size may be required.

[0006] However, when using large-size image sensors and large-diameter lenses in folding systems, there is a problem of increased module thickness. 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 having positive refractive power; a second lens having a concave object-side surface in its paraxial region; a third lens having positive refractive power; a fourth lens having negative refractive power; a fifth lens having refractive power; and a sixth lens having a concave image-side surface in its paraxial region, wherein the first, second, third, fourth, fifth, and sixth lenses are arranged sequentially from the object side of the optical imaging system toward the imaging surface of the optical imaging system along the optical axis, and satisfy the condition 0.6 ≤ CT1 / d2 ≤ 1.4, where CT1 is the thickness of the first lens along the optical axis, and d2 is the air gap between the second and third lenses along the optical axis.

[0009] The object-side surface of the first lens may be convex in its paraxial region, and the image-side surface of the first lens may be convex in its paraxial region.

[0010] The second lens can have negative refractive power.

[0011] The fifth lens can have positive refractive power, and the sixth lens can have negative refractive power.

[0012] The object-side surface of the fifth lens may be convex in its paraxial region, and the image-side surface of the fifth lens may also be convex in its paraxial region.

[0013] The first and second lenses can be D-shaped cut lenses.

[0014] The second, third, and fourth lenses may each have a refractive index of 1.6 or greater.

[0015] It can satisfy the conditional expression 0.1 ≤ IMH / f ≤ 0.4, where IMH is half the diagonal length of the imaging plane, and f is the total focal length of the optical imaging system.

[0016] It can satisfy the conditional expression 0.7 ≤ SD1 / IMH ≤ 1.0, where SD1 is the maximum effective radius of the object side of the first lens, and IMH is half the diagonal length of the imaging plane.

[0017] The conditional expression 0.5 ≤ EPD / Td ≤ 0.9 can be satisfied, where EPD is the diameter of the entrance pupil of the optical imaging system, and Td is the total distance along the optical axis from the object side of the first lens to the image side of the sixth lens.

[0018] In another general aspect, the optical imaging system includes: a first lens having a convex image-side surface in its paraxial region; a second lens having negative refractive power; a third lens having positive refractive power; a fourth lens having negative refractive power; a fifth lens having positive refractive power and having a convex object-side surface in its paraxial region; and a sixth lens having refractive power, wherein the first, second, third, fourth, fifth, and sixth lenses are arranged sequentially 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 fifth lens having an Abbe number of 50 or greater, and satisfying the conditional expression 0.1 ≤ IMH / f ≤ 0.4, where IMH is half the diagonal length of the imaging surface, and f is the total focal length of the optical imaging system.

[0019] The condition 0.4 ≤ ΣAT / Td ≤ 0.6 can be satisfied, where ΣAT is the sum of the air gaps along the optical axis between the first and second lenses, between the second and third lenses, between the third and fourth lenses, between the fourth and fifth lenses, and between the fifth and sixth lenses, and Td is the total distance along the optical axis from the object side of the first lens to the image side of the sixth lens.

[0020] The condition 0.7 ≤ CT1 / ET2 ≤ 1.5 can be satisfied, where CT1 is the thickness of the first lens along the optical axis and ET2 is the peripheral thickness of the second lens at the edge of the second lens.

[0021] The conditional expression 0.5 < AR1 < 1.0 can be satisfied, where AR1 is the ratio of the minor axis diameter of the first lens to the major axis diameter of the first lens.

[0022] It can satisfy the conditional expression 0.6 ≤ f123 / f ≤ 1.2, where f123 is the composite focal length of the first lens, the second lens and the third lens, and f is the total focal length of the optical imaging system.

[0023] The object-side surface of the sixth lens may be concave in its paraxial region.

[0024] Other features and aspects will become apparent from the following detailed description and accompanying drawings. Attached Figure Description

[0025] Figure 1A This is a configuration diagram showing an optical imaging system according to a first embodiment of the present disclosure.

[0026] Figure 1B This is a graph showing the aberration characteristics of an optical imaging system according to a first embodiment of the present disclosure.

[0027] Figure 2A This is a configuration diagram showing an optical imaging system according to a second embodiment of the present disclosure.

[0028] Figure 2B This is a graph showing the aberration characteristics of an optical imaging system according to a second embodiment of the present disclosure.

[0029] Figure 3A This is a configuration diagram showing an optical imaging system according to a third embodiment of the present disclosure.

[0030] Figure 3B This is a graph showing the aberration characteristics of an optical imaging system according to a third embodiment of the present disclosure.

[0031] Figure 4A This is a configuration diagram showing an optical imaging system according to a fourth embodiment of the present disclosure.

[0032] Figure 4B This is a graph showing the aberration characteristics of an optical imaging system according to a fourth embodiment of the present disclosure.

[0033] Figure 5A This is a configuration diagram showing an optical imaging system according to a fifth embodiment of the present disclosure.

[0034] Figure 5B This is a graph showing the aberration characteristics of an optical imaging system according to a fifth embodiment of the present disclosure.

[0035] Figure 6A This is a configuration diagram showing an optical imaging system according to a sixth embodiment of the present disclosure.

[0036] Figure 6B This is a graph showing the aberration characteristics of an optical imaging system according to a sixth embodiment of the present disclosure.

[0037] Figure 7A This is a configuration diagram showing an optical imaging system according to a seventh embodiment of the present disclosure.

[0038] Figure 7B This is a graph showing the aberration characteristics of an optical imaging system according to a seventh embodiment of the present disclosure.

[0039] Figure 8A This is a configuration diagram showing an optical imaging system according to an eighth embodiment of the present disclosure.

[0040] Figure 8B This is a graph showing the aberration characteristics of an optical imaging system according to an eighth embodiment of the present disclosure.

[0041] Figure 9A This is a configuration diagram showing an optical imaging system according to a ninth embodiment of the present disclosure.

[0042] Figure 9B This is a graph showing the aberration characteristics of an optical imaging system according to a ninth embodiment of the present disclosure.

[0043] Figure 10A This is a configuration diagram showing an optical imaging system according to a tenth embodiment of the present disclosure.

[0044] Figure 10B This is a graph showing the aberration characteristics of an optical imaging system according to the tenth embodiment of the present disclosure.

[0045] Figure 11A This is a configuration diagram showing an optical imaging system according to the eleventh embodiment of the present disclosure.

[0046] Figure 11B This is a graph showing the aberration characteristics of an optical imaging system according to the eleventh embodiment of the present disclosure.

[0047] Figure 12A This is a configuration diagram showing an optical imaging system according to the twelfth embodiment of the present disclosure.

[0048] Figure 12BThis is a graph showing the aberration characteristics of an optical imaging system according to the twelfth embodiment of the present disclosure.

[0049] Figure 13A This is a configuration diagram showing an optical imaging system according to a thirteenth embodiment of the present disclosure.

[0050] Figure 13B This is a graph showing the aberration characteristics of an optical imaging system according to the thirteenth embodiment of the present disclosure.

[0051] Figure 14A This is a configuration diagram showing an optical imaging system according to the fourteenth embodiment of the present disclosure.

[0052] Figure 14B This is a graph showing the aberration characteristics of an optical imaging system according to the fourteenth embodiment of the present disclosure.

[0053] Figure 15A This is a configuration diagram showing an optical imaging system according to the fifteenth embodiment of the present disclosure.

[0054] Figure 15B This is a graph showing the aberration characteristics of an optical imaging system according to the fifteenth embodiment of the present disclosure.

[0055] Figure 16A This is a configuration diagram showing an optical imaging system according to a sixteenth embodiment of the present disclosure.

[0056] Figure 16B This is a graph showing the aberration characteristics of an optical imaging system according to the sixteenth embodiment of the present disclosure.

[0057] Figure 17A This is a configuration diagram showing an optical imaging system according to the seventeenth embodiment of the present disclosure.

[0058] Figure 17B This is a graph showing the aberration characteristics of an optical imaging system according to the seventeenth embodiment of the present disclosure.

[0059] Figure 18A This is a configuration diagram showing an optical imaging system according to the eighteenth embodiment of the present disclosure.

[0060] Figure 18B This is a graph showing the aberration characteristics of an optical imaging system according to the eighteenth embodiment of the present disclosure.

[0061] Figure 19A This is a configuration diagram showing an optical imaging system according to the nineteenth embodiment of the present disclosure.

[0062] Figure 19B This is a graph showing the aberration characteristics of an optical imaging system according to the nineteenth embodiment of the present disclosure.

[0063] Figure 20A This is a configuration diagram showing an optical imaging system according to the twentieth embodiment of the present disclosure.

[0064] Figure 20B This is a graph showing the aberration characteristics of an optical imaging system according to the twentieth embodiment of the present disclosure.

[0065] Figure 21A This is a configuration diagram showing an optical imaging system according to the twenty-first embodiment of the present disclosure.

[0066] Figure 21B This is a graph showing the aberration characteristics of an optical imaging system according to the twenty-first embodiment of this disclosure.

[0067] Figure 22A This is a configuration diagram showing an optical imaging system according to the twenty-second embodiment of the present disclosure.

[0068] Figure 22B This is a graph showing the aberration characteristics of an optical imaging system according to the twenty-second embodiment of this disclosure.

[0069] Figure 23 This is an example of a D-shaped cut lens according to an embodiment of the present disclosure.

[0070] Figure 24 This is a configuration diagram of a telephoto camera according to an embodiment of the present disclosure.

[0071] 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

[0072] 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.

[0073] 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, apparatuses, and / or systems described herein will become apparent upon understanding the disclosure of this application.

[0074] 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.

[0075] As used herein, the term “and / or” includes any one of the associated listed items and any combination of any two or more items.

[0076] 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.

[0077] 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.

[0078] 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.

[0079] In the accompanying drawings, for clarity of illustration, the thickness, size, and shape of the lens may be slightly exaggerated, and the aspherical shape of the lens is merely an example and not a limitation thereof.

[0080] In an embodiment, the first lens may refer to the lens closest to the object side, and the sixth lens may refer to the lens closest to the image sensor.

[0081] Furthermore, in the embodiments, the units for the radius of curvature, thickness, distance, focal length, effective radius, and other measurements of the lens may be millimeters (mm), and the unit for the field of view may be degrees (°).

[0082] Furthermore, in the description of lens shape, the statement that the lens surface has a convex shape means that the paraxial region of the surface has a convex shape, and the statement that the lens surface has a concave shape means that the paraxial region of the surface has a concave shape. Therefore, even when the lens surface is described as having a convex shape, the edge portion of the lens surface may have a concave shape. Similarly, even when the lens surface is described as having a concave shape, the edge portion of the lens surface may have a convex shape.

[0083] The paraxial region of a lens surface is a very narrow area surrounding the optical axis of the lens surface.

[0084] 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 which 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.

[0085] The optical imaging system according to the embodiment may include six lenses.

[0086] 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, and a sixth lens arranged sequentially 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.

[0087] However, the optical imaging system according to the embodiment may include other components in addition to the six lenses.

[0088] For example, the optical imaging system according to the embodiment may further include an image sensor configured to convert incident light into an electrical signal.

[0089] In addition, for example, the optical imaging system may also include an infrared blocking filter (hereinafter referred to as the "filter") configured to block infrared light incident on the image sensor. The filter may be positioned between the sixth lens and the image sensor.

[0090] Furthermore, for example, the optical imaging system may also include an aperture stop configured to adjust the amount of light reaching the image sensor. The aperture stop may be positioned between the third lens and the fourth lens.

[0091] The optical imaging system according to the embodiments may include lenses made of plastic material.

[0092] For example, the first to sixth lenses according to the embodiment may be made of plastic material.

[0093] Furthermore, the optical imaging system according to the embodiments may include lenses made of plastic materials that have different optical properties from each other.

[0094] For example, some of the lenses, from the first to the sixth lens, may be made of a plastic material with optical properties that are different from those of the plastic material used in the other lenses.

[0095] The optical imaging system according to the embodiment may include at least one D-shaped cut lens.

[0096] For example, according to an embodiment, the first and second lenses may be D-shaped cut lenses, and the other lenses (the third to sixth lenses) may be circular lenses.

[0097] A D-shaped cut lens is a lens in which some edges are not circular. For example, some edges of a D-shaped cut lens can be cut to form straight edges.

[0098] When viewed along the optical axis (the direction in which the first to sixth lenses are positioned), in a D-shaped cut lens, each of the two opposite edges along the long axis can have an arc shape, and each of the two opposite edges along the short axis can have a straight shape.

[0099] Furthermore, according to an embodiment, at least one of the first to sixth lenses may have an aspherical surface.

[0100] For example, the object-side surface and image-side surface of the first to sixth lenses can be aspherical.

[0101] The aspherical surfaces of the first to sixth lenses can be represented by Equation 1 below.

[0102] (1)

[0103] 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 between a point on the aspherical surface of the lens at a distance Y from the optical axis and a tangent plane perpendicular to the optical axis and intersecting the vertex of the aspherical surface, in a direction parallel to the optical axis.

[0104] The optical imaging system according to the embodiment can satisfy any one or any combination of two or more of the following conditional expressions 1 to 9.

[0105] 0.5 < AR1 < 1.0 (Conditional expression 1)

[0106] 0.6 ≤ CT1 / d2 ≤ 1.4 (Conditional expression 2)

[0107] 0.4 ≤ ΣAT / Td ≤ 0.6 (Conditional expression 3)

[0108] 0.7 ≤ CT1 / ET2 ≤ 1.5 (Conditional expression 4)

[0109] 0.1 ≤ IMH / f ≤ 0.4 (Conditional expression 5)

[0110] 0.5 ≤ EPD / Td ≤ 0.9 (Conditional expression 6)

[0111] 0.7 ≤ SD1 / IMH ≤ 1.0 (Conditional expression 7)

[0112] 0.5 ≤ ΣCT / Td ≤ 0.8 (Conditional expression 8)

[0113] 0.6 ≤ f123 / f ≤ 1.2 (Conditional expression 9)

[0114] In conditional expression 1, AR1 can represent the ratio of the minor axis diameter to the major axis diameter of the first lens. When conditional expression 1 is satisfied, the first lens can be a D-shaped cut lens, and the module thickness (height) can be reduced.

[0115] In conditional expression 2, CT1 can represent the thickness of the first lens along the optical axis, and d2 can represent the air gap (or the distance from the image side of the second lens to the object side of the third lens) along the optical axis between the second and third lenses. Conditional expression 2 relates to a structure in which the third lens is positioned far from the first and second lenses, and when conditional expression 2 is satisfied, the size of the lens following the third lens can be reduced.

[0116] In conditional expression 3, ΣAT can represent the sum of the air gaps between the lenses along the optical axis, and Td can represent the total distance along the optical axis from the object side of the first lens to the image side of the sixth lens. Conditional expression 3 relates to a structure where the air gaps between the lenses are set at a predetermined level or higher, and when conditional expression 3 is satisfied, the curvature of the imaging surface can be effectively corrected.

[0117] In conditional expression 4, CT1 can represent the thickness of the first lens along the optical axis, and ET2 can represent the peripheral thickness of the second lens at the edge of the second lens. Conditional expression 4 defines the ratio of the thickness of the first lens along the optical axis to the peripheral thickness of the second lens at the edge of the second lens, in order to effectively correct for aberrations.

[0118] In conditional expression 5, IMH can represent half the diagonal length of the imaging plane, and f can represent the total focal length of the optical imaging system. Compared to the size of the image sensor, a telephoto camera can have a relatively long focal length, and an optical imaging system can correspond to a telephoto camera when conditional expression 5 is satisfied. In the accompanying figures, IMH is shown as IMG HT.

[0119] In conditional expression 6, EPD can represent the diameter of the entrance pupil of the optical imaging system, and Td can represent the total distance along the optical axis from the object-side surface of the first lens to the image-side surface of the sixth lens. Conditional expression 6 represents the characteristics of a large-diameter telephoto camera, and when conditional expression 6 is satisfied, a relatively low F-number can be obtained.

[0120] In conditional expression 7, SD1 can represent the maximum effective radius of the object-side surface of the first lens, and IMH can represent half the diagonal length of the imaging plane. Conditional expression 7 reflects the characteristic that the effective diameter of the lens is larger than the size of the image sensor, and a relatively low F-number can be obtained when conditional expression 7 is satisfied.

[0121] In conditional expression 8, ΣCT can represent the sum of the lens thicknesses along the optical axis, and Td can represent the total distance along the optical axis from the object-side surface of the first lens to the image-side surface of the sixth lens. In optical imaging systems with large image sensors and low F-numbers, the lens thickness can typically be increased, and aberration correction performance can be ensured when conditional expression 8 is satisfied.

[0122] In conditional expression 9, f123 can represent the combined focal length of the first, second, and third lenses, and f can represent the total focal length of the optical imaging system. Conditional expression 9 relates to the characteristic that the first to third lenses significantly contribute to the formation of the total focal length of the optical imaging system.

[0123] In the following description, an optical imaging system according to an embodiment will be described.

[0124] First Embodiment

[0125] Figure 1A This is a configuration diagram showing an optical imaging system according to a first embodiment of the present disclosure. Figure 1B This is a graph showing the aberration characteristics of an optical imaging system according to a first embodiment of the present disclosure.

[0126] The optical imaging system 100 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, and a sixth lens 160 arranged sequentially along the optical axis of the optical imaging system 100 from the object side of the optical imaging system 100 toward the imaging surface IP of the optical imaging system 100. It may also include a filter F disposed on the image side of the sixth lens 160 and an image sensor IS including the imaging surface IP. Furthermore, an aperture stop (not shown) may be disposed between the third lens 130 and the fourth lens 140.

[0127] Table 1 below lists the characteristics of each of the lenses and other elements included in the optical imaging system 100 according to the first embodiment.

[0128] Table 1

[0129] According to the first embodiment, the first lens 110 and the second lens 120 can be D-shaped cut lenses.

[0130] According to the first embodiment, lenses with opposite refractive powers can be arranged in an alternating sequence. For example, the first lens 110 can have positive refractive power, the second lens 120 can have negative refractive power, the third lens 130 can have positive refractive power, the fourth lens 140 can have negative refractive power, the fifth lens 150 can have positive refractive power, and the sixth lens 160 can have negative refractive power.

[0131] According to the first embodiment, the object-side surface and image-side surface of the first lens 110 may be convex in their respective paraxial regions, and the object-side surface and image-side surface of the second lens 120 may be concave in their respective paraxial regions. The object-side surface of the third lens 130 and the object-side surface of the fourth lens 140 may be convex in their respective paraxial regions, and the image-side surface of the third lens 130 and the image-side surface of the fourth lens 140 may be concave in their respective paraxial regions. The object-side surface and image-side surface of the fifth lens 150 may be convex in their respective paraxial regions. The object-side surface of the sixth lens 160 may be convex in its paraxial region, and the image-side surface of the sixth lens 160 may be concave in its paraxial region.

[0132] According to the first embodiment, the first lens 110, the second lens 120, and the third lens 130 can be made of plastic materials with different optical properties from each other. The fourth lens 140 can be made of the same plastic material as the second lens 120, and the fifth lens 150 and the sixth lens 160 can be made of the same plastic material as the first lens 110.

[0133] According to the first embodiment, the second lens 120, the third lens 130 and the fourth lens 140 can each be a high refractive index lens having a refractive index of 1.6 or greater.

[0134] Furthermore, the Abbe number of each of the first lens 110, the fifth lens 150, and the sixth lens 160 may be 50 or greater, the Abbe number of each of the second lens 120 and the fourth lens 140 may be 20 or greater and less than 40, and the Abbe number of the third lens 130 may be less than 20.

[0135] Table 2 below lists the aspherical coefficients of each lens included in the optical imaging system 100 according to the first embodiment. According to the first embodiment, the object-side and image-side surfaces of the first lens 110 to the sixth lens 160 may be aspherical.

[0136] Table 2

[0137] Second Embodiment

[0138] Figure 2AThis is a configuration diagram showing an optical imaging system according to a second embodiment of the present disclosure. Figure 2B This is a graph showing the aberration characteristics of an optical imaging system according to a second embodiment of the present disclosure.

[0139] The optical imaging system 200 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, and a sixth lens 260 arranged sequentially along the optical axis of the optical imaging system 200 from the object side of the optical imaging system 200 toward the imaging surface IP of the optical imaging system 200. It may also include a filter F disposed on the image side of the sixth lens 260 and an image sensor IS including the imaging surface IP. Furthermore, an aperture stop (not shown) may be disposed between the third lens 230 and the fourth lens 240.

[0140] Table 3 below lists the characteristics of each of the lenses and other elements included in the optical imaging system 200 according to the second embodiment.

[0141] Table 3

[0142] According to the second embodiment, the first lens 210 and the second lens 220 can be D-shaped cut lenses.

[0143] According to the second embodiment, lenses with opposite refractive powers can be arranged in an alternating order. For example, the first lens 210 can have positive refractive power, the second lens 220 can have negative refractive power, the third lens 230 can have positive refractive power, the fourth lens 240 can have negative refractive power, the fifth lens 250 can have positive refractive power, and the sixth lens 260 can have negative refractive power.

[0144] According to the second embodiment, the object-side and image-side surfaces of the first lens 210 may be convex in their respective paraxial regions, and the object-side and image-side surfaces of the second lens 220 may be concave in their respective paraxial regions. The object-side surfaces of the third lens 230 and the fourth lens 240 may be convex in their respective paraxial regions, and the image-side surfaces of the third lens 230 and the fourth lens 240 may be concave in their respective paraxial regions. The object-side and image-side surfaces of the fifth lens 250 may be convex in their respective paraxial regions. The object-side surface of the sixth lens 260 may be convex in its paraxial region, and the image-side surface of the sixth lens 260 may be concave in its paraxial region.

[0145] According to the second embodiment, the first lens 210, the second lens 220, and the third lens 230 can be made of plastic materials with different optical properties from each other. The fourth lens 240 can be made of the same plastic material as the second lens 220, and the fifth lens 250 and the sixth lens 260 can be made of the same plastic material as the first lens 210.

[0146] According to the first embodiment, the second lens 220, the third lens 230 and the fourth lens 240 can each be a high refractive index lens having a refractive index of 1.6 or greater.

[0147] Furthermore, the Abbe number of each of the first lens 210, the fifth lens 250, and the sixth lens 260 may be 50 or greater, the Abbe number of each of the second lens 220 and the fourth lens 240 may be 20 or greater and less than 40, and the Abbe number of the third lens 230 may be less than 20.

[0148] Table 4 below lists the aspherical coefficients of each lens included in the optical imaging system 200 according to the second embodiment. According to the second embodiment, the object-side and image-side surfaces of the first lens 210 to the sixth lens 260 may be aspherical.

[0149] Table 4

[0150] Third Embodiment

[0151] Figure 3A This is a configuration diagram showing an optical imaging system according to a third embodiment of the present disclosure. Figure 3B This is a graph showing the aberration characteristics of an optical imaging system according to a third embodiment of the present disclosure.

[0152] The optical imaging system 300 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, and a sixth lens 360 arranged sequentially along the optical axis of the optical imaging system 300 from the object side of the optical imaging system 300 toward the imaging surface IP of the optical imaging system 300. It may also include a filter F disposed on the image side of the sixth lens 360 and an image sensor IS including the imaging surface IP. Furthermore, an aperture stop (not shown) may be disposed between the third lens 330 and the fourth lens 340.

[0153] Table 5 below lists the characteristics of each of the lenses and other elements included in the optical imaging system 300 according to the third embodiment.

[0154] Table 5

[0155] According to the third embodiment, the first lens 310 and the second lens 320 can be D-shaped cut lenses.

[0156] According to the third embodiment, lenses with opposite refractive powers can be arranged in an alternating order. For example, the first lens 310 can have positive refractive power, the second lens 320 can have negative refractive power, the third lens 330 can have positive refractive power, the fourth lens 340 can have negative refractive power, the fifth lens 350 can have positive refractive power, and the sixth lens 360 can have negative refractive power.

[0157] According to the third embodiment, the object-side and image-side surfaces of the first lens 310 may be convex in their respective paraxial regions, and the object-side and image-side surfaces of the second lens 320 may be concave in their respective paraxial regions. The object-side surfaces of the third lens 330 and the fourth lens 340 may be convex in their respective paraxial regions, and the image-side surfaces of the third lens 330 and the fourth lens 340 may be concave in their respective paraxial regions. The object-side and image-side surfaces of the fifth lens 350 may be convex in their respective paraxial regions. The object-side surface of the sixth lens 360 may be convex in its respective paraxial region, and the image-side surface of the sixth lens 360 may be concave in its respective paraxial region.

[0158] According to the third embodiment, the first lens 310, the second lens 320, and the third lens 330 can be made of plastic materials with different optical properties from each other. The fourth lens 340 can be made of the same plastic material as the second lens 320, and the fifth lens 350 and the sixth lens 360 can be made of the same plastic material as the first lens 310.

[0159] According to the third embodiment, the second lens 320, the third lens 330 and the fourth lens 340 can each be a high refractive index lens having a refractive index of 1.6 or greater.

[0160] Furthermore, the Abbe number of each of the first lens 310, the fifth lens 350, and the sixth lens 360 may be 50 or greater, the Abbe number of each of the second lens 320 and the fourth lens 340 may be 20 or greater and less than 40, and the Abbe number of the third lens 330 may be less than 20.

[0161] Table 6 below lists the aspherical coefficients of each lens included in the optical imaging system 300 according to the third embodiment. According to the third embodiment, the object-side and image-side surfaces of the first lens 310 to the sixth lens 360 may be aspherical.

[0162] Table 6

[0163] Fourth embodiment

[0164] Figure 4A This is a configuration diagram showing an optical imaging system according to a fourth embodiment of the present disclosure. Figure 4B This is a graph showing the aberration characteristics of an optical imaging system according to a fourth embodiment of the present disclosure.

[0165] The optical imaging system 400 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, and a sixth lens 460 arranged sequentially along the optical axis of the optical imaging system 400 from the object side of the optical imaging system 400 toward the imaging surface IP of the optical imaging system 400. It may also include a filter F disposed on the image side of the sixth lens 460 and an image sensor IS including the imaging surface IP. Furthermore, an aperture stop (not shown) may be disposed between the third lens 430 and the fourth lens 440.

[0166] Table 7 below lists the characteristics of each of the lenses and other elements included in the optical imaging system 400 according to the fourth embodiment.

[0167] Table 7

[0168] According to the fourth embodiment, the first lens 410 and the second lens 420 can be D-shaped cut lenses.

[0169] According to the fourth embodiment, lenses with opposite refractive powers can be arranged in an alternating order. For example, the first lens 410 can have positive refractive power, the second lens 420 can have negative refractive power, the third lens 430 can have positive refractive power, the fourth lens 440 can have negative refractive power, the fifth lens 450 can have positive refractive power, and the sixth lens 460 can have negative refractive power.

[0170] According to the fourth embodiment, the object-side and image-side surfaces of the first lens 410 may be convex in their respective paraxial regions, and the object-side and image-side surfaces of the second lens 420 may be concave in their respective paraxial regions. The object-side surfaces of the third lens 430 and the fourth lens 440 may be convex in their respective paraxial regions, and the image-side surfaces of the third lens 430 and the fourth lens 440 may be concave in their respective paraxial regions. The object-side and image-side surfaces of the fifth lens 450 may be convex in their respective paraxial regions. The object-side and image-side surfaces of the sixth lens 460 may be concave in their respective paraxial regions.

[0171] According to the fourth embodiment, the first lens 410, the second lens 420, and the third lens 430 can be made of plastic materials with different optical properties from each other. The fourth lens 440 can be made of the same plastic material as the second lens 420, and the fifth lens 450 and the sixth lens 460 can be made of the same plastic material as the first lens 410.

[0172] According to the fourth embodiment, the second lens 420, the third lens 430 and the fourth lens 440 can each be a high refractive index lens having a refractive index of 1.6 or greater.

[0173] Furthermore, the Abbe number of each of the first lens 410, the fifth lens 450, and the sixth lens 460 may be 50 or greater, the Abbe number of each of the second lens 420 and the fourth lens 440 may be 20 or greater and less than 40, and the Abbe number of the third lens 430 may be less than 30.

[0174] Table 8 below lists the aspherical coefficients of each lens included in the optical imaging system 400 according to the fourth embodiment. According to the fourth embodiment, the object-side and image-side surfaces of the first lens 410 to the sixth lens 460 may be aspherical.

[0175] Table 8

[0176] Fifth embodiment

[0177] Figure 5A This is a configuration diagram showing an optical imaging system according to a fifth embodiment of the present disclosure. Figure 5B This is a graph showing the aberration characteristics of an optical imaging system according to a fifth embodiment of the present disclosure.

[0178] The optical imaging system 500 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, and a sixth lens 560 arranged sequentially along the optical axis of the optical imaging system 500 from the object side of the optical imaging system 500 toward the imaging surface IP of the optical imaging system 500. It may also include a filter F disposed on the image side of the sixth lens 560 and an image sensor IS including the imaging surface IP. Furthermore, an aperture stop (not shown) may be disposed between the third lens 530 and the fourth lens 540.

[0179] Table 9 below lists the characteristics of each of the lenses and other elements included in the optical imaging system 500 according to the fifth embodiment.

[0180] Table 9

[0181] According to the fifth embodiment, the first lens 510 and the second lens 520 can be D-shaped cut lenses.

[0182] According to the fifth embodiment, lenses with opposite refractive powers can be arranged in an alternating sequence. For example, the first lens 510 can have positive refractive power, the second lens 520 can have negative refractive power, the third lens 530 can have positive refractive power, the fourth lens 540 can have negative refractive power, the fifth lens 550 can have positive refractive power, and the sixth lens 560 can have negative refractive power.

[0183] According to the fifth embodiment, the object-side and image-side surfaces of the first lens 510 may be convex in their respective paraxial regions, and the object-side and image-side surfaces of the second lens 520 may be concave in their respective paraxial regions. The object-side surfaces of the third lens 530 and the fourth lens 540 may be convex in their respective paraxial regions, and the image-side surfaces of the third lens 530 and the fourth lens 540 may be concave in their respective paraxial regions. The object-side and image-side surfaces of the fifth lens 550 may be convex in their respective paraxial regions. The object-side surface of the sixth lens 560 may be convex in its paraxial region, and the image-side surface of the sixth lens 560 may be concave in its paraxial region.

[0184] According to the fifth embodiment, the first lens 510, the second lens 520, and the third lens 530 can be made of plastic materials with different optical properties from each other. The fourth lens 540 can be made of the same plastic material as the second lens 520, and the fifth lens 550 and the sixth lens 560 can be made of the same plastic material as the first lens 510.

[0185] According to the fifth embodiment, the second lens 520, the third lens 530 and the fourth lens 540 can each be a high refractive index lens having a refractive index of 1.6 or greater.

[0186] Furthermore, the Abbe number of each of the first lens 510, the fifth lens 550, and the sixth lens 560 may be 50 or greater, the Abbe number of each of the second lens 520 and the fourth lens 540 may be 20 or greater and less than 40, and the Abbe number of the third lens 530 may be less than 20.

[0187] Table 10 below lists the aspherical coefficients of each lens included in the optical imaging system 500 according to the fifth embodiment. According to the fifth embodiment, the object-side and image-side surfaces of the first lens 510 to the sixth lens 560 may be aspherical.

[0188] Table 10

[0189] Sixth Embodiment

[0190] Figure 6A This is a configuration diagram showing an optical imaging system according to a sixth embodiment of the present disclosure. Figure 6B This is a graph showing the aberration characteristics of an optical imaging system according to a sixth embodiment of the present disclosure.

[0191] The optical imaging system 600 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, and a sixth lens 660 arranged sequentially along the optical axis of the optical imaging system 600 from the object side of the optical imaging system 600 toward the imaging surface IP of the optical imaging system 600. It may also include a filter F disposed on the image side of the sixth lens 660 and an image sensor IS including the imaging surface IP. Furthermore, an aperture stop (not shown) may be disposed between the third lens 630 and the fourth lens 640.

[0192] Table 11 below lists the characteristics of each of the lenses and other elements included in the optical imaging system 600 according to the sixth embodiment.

[0193] Table 11

[0194] According to the sixth embodiment, the first lens 610 and the second lens 620 can be D-shaped cut lenses.

[0195] According to the sixth embodiment, lenses with opposite refractive powers can be arranged in an alternating order. For example, the first lens 610 can have positive refractive power, the second lens 620 can have negative refractive power, the third lens 630 can have positive refractive power, the fourth lens 640 can have negative refractive power, the fifth lens 650 can have positive refractive power, and the sixth lens 660 can have negative refractive power.

[0196] According to the sixth embodiment, the object-side and image-side surfaces of the first lens 610 may be convex in their respective paraxial regions, and the object-side and image-side surfaces of the second lens 620 may be concave in their respective paraxial regions. The object-side surfaces of the third lens 630 and the fourth lens 640 may be convex in their respective paraxial regions, and the image-side surfaces of the third lens 630 and the fourth lens 640 may be concave in their respective paraxial regions. The object-side and image-side surfaces of the fifth lens 650 may be convex in their respective paraxial regions. The object-side surface of the sixth lens 660 may be convex in its paraxial region, and the image-side surface of the sixth lens 660 may be concave in its paraxial region.

[0197] According to the sixth embodiment, the first lens 610, the second lens 620, and the third lens 630 can be made of plastic materials with different optical properties from each other. The fourth lens 640 can be made of the same plastic material as the second lens 620, and the fifth lens 650 and the sixth lens 660 can be made of the same plastic material as the first lens 610.

[0198] According to the sixth embodiment, the second lens 620, the third lens 630 and the fourth lens 640 can each be a high refractive index lens having a refractive index of 1.6 or greater.

[0199] Furthermore, the Abbe number of each of the first lens 610, the fifth lens 650, and the sixth lens 660 may be 50 or greater, the Abbe number of each of the second lens 620 and the fourth lens 640 may be 20 or greater and less than 40, and the Abbe number of the third lens 630 may be less than 20.

[0200] Table 12 below lists the aspherical coefficients of each lens included in the optical imaging system 600 according to the sixth embodiment. According to the sixth embodiment, the object-side and image-side surfaces of the first lens 610 to the sixth lens 660 may be aspherical.

[0201] Table 12

[0202] Seventh Embodiment

[0203] Figure 7A This is a configuration diagram showing an optical imaging system according to a seventh embodiment of the present disclosure. Figure 7B This is a graph showing the aberration characteristics of an optical imaging system according to a seventh embodiment of the present disclosure.

[0204] The optical imaging system 700 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, and a sixth lens 760 arranged sequentially along the optical axis of the optical imaging system 700 from the object side of the optical imaging system 700 toward the imaging surface IP of the optical imaging system 700. It may also include a filter F disposed on the image side of the sixth lens 760 and an image sensor IS including the imaging surface IP. Furthermore, an aperture stop (not shown) may be disposed between the third lens 730 and the fourth lens 740.

[0205] Table 13 below lists the characteristics of each of the lenses and other elements included in the optical imaging system 700 according to the seventh embodiment.

[0206] Table 13

[0207] According to the seventh embodiment, the first lens 710 and the second lens 720 can be D-shaped cut lenses.

[0208] According to the seventh embodiment, lenses with opposite refractive powers can be arranged in an alternating order. For example, the first lens 710 can have positive refractive power, the second lens 720 can have negative refractive power, the third lens 730 can have positive refractive power, the fourth lens 740 can have negative refractive power, the fifth lens 750 can have positive refractive power, and the sixth lens 760 can have negative refractive power.

[0209] According to the seventh embodiment, the object-side and image-side surfaces of the first lens 710 may be convex in their respective paraxial regions, and the object-side and image-side surfaces of the second lens 720 may be concave in their respective paraxial regions. The object-side surfaces of the third lens 730 and the fourth lens 740 may be convex in their respective paraxial regions, and the image-side surfaces of the third lens 730 and the fourth lens 740 may be concave in their respective paraxial regions. The object-side and image-side surfaces of the fifth lens 750 may be convex in their respective paraxial regions. The object-side and image-side surfaces of the sixth lens 760 may be concave in their respective paraxial regions.

[0210] According to the seventh embodiment, the first lens 710, the second lens 720, and the third lens 730 can be made of plastic materials with different optical properties from each other. The fourth lens 740 can be made of the same plastic material as the second lens 720, and the fifth lens 750 and the sixth lens 760 can be made of the same plastic material as the first lens 710.

[0211] According to the seventh embodiment, the second lens 720, the third lens 730, and the fourth lens 740 can each be a high refractive index lens having a refractive index of 1.6 or greater.

[0212] Furthermore, the Abbe number of each of the first lens 710, the fifth lens 750, and the sixth lens 760 can be 50 or greater, the Abbe number of each of the second lens 720 and the fourth lens 740 can be 20 or greater and less than 40, and the Abbe number of the third lens 730 can be less than 30.

[0213] Table 14 below lists the aspherical coefficients of each lens included in the optical imaging system 700 according to the seventh embodiment. According to the seventh embodiment, the object-side and image-side surfaces of the first lens 710 to the sixth lens 760 may be aspherical.

[0214] Table 14

[0215] Eighth embodiment

[0216] Figure 8A This is a configuration diagram showing an optical imaging system according to an eighth embodiment of the present disclosure. Figure 8B This is a graph showing the aberration characteristics of an optical imaging system according to an eighth embodiment of the present disclosure.

[0217] The optical imaging system 800 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, and a sixth lens 860 arranged sequentially along the optical axis of the optical imaging system 800 from the object side of the optical imaging system 800 toward the imaging surface IP of the optical imaging system 800. It may also include a filter F disposed on the image side of the sixth lens 860 and an image sensor IS including the imaging surface IP. Furthermore, an aperture stop (not shown) may be disposed between the third lens 830 and the fourth lens 840.

[0218] Table 15 below lists the characteristics of each of the lenses and other elements included in the optical imaging system 800 according to the eighth embodiment.

[0219] Table 15

[0220] According to the eighth embodiment, the first lens 810 and the second lens 820 can be D-shaped cut lenses.

[0221] According to the eighth embodiment, lenses with opposite refractive powers can be arranged in an alternating order. For example, the first lens 810 can have positive refractive power, the second lens 820 can have negative refractive power, the third lens 830 can have positive refractive power, the fourth lens 840 can have negative refractive power, the fifth lens 850 can have positive refractive power, and the sixth lens 860 can have negative refractive power.

[0222] According to the eighth embodiment, the object-side and image-side surfaces of the first lens 810 may be convex in their respective paraxial regions, and the object-side and image-side surfaces of the second lens 820 may be concave in their respective paraxial regions. The object-side surfaces of the third lens 830 and the fourth lens 840 may be convex in their respective paraxial regions, and the image-side surfaces of the third lens 830 and the fourth lens 840 may be concave in their respective paraxial regions. The object-side and image-side surfaces of the fifth lens 850 may be convex in their respective paraxial regions. The object-side surface of the sixth lens 860 may be convex in its paraxial region, and the image-side surface of the sixth lens 860 may be concave in its paraxial region.

[0223] According to the eighth embodiment, the first lens 810, the second lens 820, and the third lens 830 can be made of plastic materials with different optical properties from each other. The fourth lens 840 can be made of the same plastic material as the second lens 820, and the fifth lens 850 and the sixth lens 860 can be made of the same plastic material as the first lens 810.

[0224] According to the eighth embodiment, the second lens 820, the third lens 830 and the fourth lens 840 can each be a high refractive index lens having a refractive index of 1.6 or greater.

[0225] Furthermore, the Abbe number of each of the first lens 810, the fifth lens 850, and the sixth lens 860 can be 50 or greater, the Abbe number of each of the second lens 820 and the fourth lens 840 can be 20 or greater and less than 40, and the Abbe number of the third lens 830 can be less than 30.

[0226] Table 16 below lists the aspherical coefficients of each lens included in the optical imaging system 800 according to the eighth embodiment. According to the eighth embodiment, the object-side and image-side surfaces of the first lens 810 to the sixth lens 860 may be aspherical.

[0227] Table 16

[0228] Ninth Embodiment

[0229] Figure 9A This is a configuration diagram showing an optical imaging system according to a ninth embodiment of the present disclosure. Figure 9B This is a graph showing the aberration characteristics of an optical imaging system according to a ninth embodiment of the present disclosure.

[0230] The optical imaging system 900 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, and a sixth lens 960 arranged sequentially along the optical axis of the optical imaging system 900 from the object side of the optical imaging system 900 toward the imaging surface IP of the optical imaging system 900. It may also include a filter F disposed on the image side of the sixth lens 960 and an image sensor IS including the imaging surface IP. Furthermore, an aperture stop (not shown) may be disposed between the third lens 930 and the fourth lens 940.

[0231] Table 17 below lists the characteristics of each of the lenses and other elements included in the optical imaging system 900 according to the ninth embodiment.

[0232] Table 17

[0233] According to the ninth embodiment, the first lens 910 and the second lens 920 can be D-shaped cut lenses.

[0234] According to the ninth embodiment, lenses with opposite refractive powers can be arranged in an alternating sequence. For example, the first lens 910 can have positive refractive power, the second lens 920 can have negative refractive power, the third lens 930 can have positive refractive power, the fourth lens 940 can have negative refractive power, the fifth lens 950 can have positive refractive power, and the sixth lens 960 can have negative refractive power.

[0235] According to the ninth embodiment, the object-side and image-side surfaces of the first lens 910 may be convex in their respective paraxial regions, and the object-side and image-side surfaces of the second lens 920 may be concave in their respective paraxial regions. The object-side surfaces of the third lens 930 and the fourth lens 940 may be convex in their respective paraxial regions, and the image-side surfaces of the third lens 930 and the fourth lens 940 may be concave in their respective paraxial regions. The object-side and image-side surfaces of the fifth lens 950 may be convex in their respective paraxial regions. The object-side surface of the sixth lens 960 may be convex in its paraxial region, and the image-side surface of the sixth lens 960 may be concave in its paraxial region.

[0236] According to the ninth embodiment, the first lens 910, the second lens 920, and the third lens 930 can be made of plastic materials with different optical properties from each other. The fourth lens 940 can be made of the same plastic material as the second lens 920, and the fifth lens 950 and the sixth lens 960 can be made of the same plastic material as the first lens 910.

[0237] According to the ninth embodiment, the second lens 920, the third lens 930, and the fourth lens 940 can each be a high refractive index lens having a refractive index of 1.6 or greater.

[0238] Furthermore, the Abbe number of each of the first lens 910, the fifth lens 950, and the sixth lens 960 may be 50 or greater, the Abbe number of each of the second lens 920 and the fourth lens 940 may be 20 or greater and less than 40, and the Abbe number of the third lens 930 may be less than 20.

[0239] Table 18 below lists the aspherical coefficients of each lens included in the optical imaging system 900 according to the ninth embodiment. According to the ninth embodiment, the object-side and image-side surfaces of the first lens 910 to the sixth lens 960 may be aspherical.

[0240] Table 18

[0241] Tenth Embodiment

[0242] Figure 10A This is a configuration diagram showing an optical imaging system according to a tenth embodiment of the present disclosure. Figure 10B This is a graph showing the aberration characteristics of an optical imaging system according to the tenth embodiment of the present disclosure.

[0243] The optical imaging system 1000 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, and a sixth lens 1060 arranged sequentially along the optical axis of the optical imaging system 1000 from the object side of the optical imaging system 1000 toward the imaging surface IP of the optical imaging system 1000. It may also include a filter F disposed on the image side of the sixth lens 1060 and an image sensor IS including the imaging surface IP. Furthermore, an aperture stop (not shown) may be disposed between the third lens 1030 and the fourth lens 1040.

[0244] Table 19 below lists the characteristics of each of the lenses and other elements included in the optical imaging system 1000 according to the tenth embodiment.

[0245] Table 19

[0246] According to the tenth embodiment, the first lens 1010 and the second lens 1020 can be D-shaped cut lenses.

[0247] According to the tenth embodiment, lenses with opposite refractive powers can be arranged in an alternating order. For example, the first lens 1010 can have positive refractive power, the second lens 1020 can have negative refractive power, the third lens 1030 can have positive refractive power, the fourth lens 1040 can have negative refractive power, the fifth lens 1050 can have positive refractive power, and the sixth lens 1060 can have negative refractive power.

[0248] According to the tenth embodiment, the object-side and image-side surfaces of the first lens 1010 may be convex in their respective paraxial regions, and the object-side and image-side surfaces of the second lens 1020 may be concave in their respective paraxial regions. The object-side surfaces of the third lens 1030 and the fourth lens 1040 may be convex in their respective paraxial regions, and the image-side surfaces of the third lens 1030 and the fourth lens 1040 may be concave in their respective paraxial regions. The object-side and image-side surfaces of the fifth lens 1050 may be convex in their respective paraxial regions. The object-side surface of the sixth lens 1060 may be convex in its paraxial region, and the image-side surface of the sixth lens 1060 may be concave in its paraxial region.

[0249] According to the tenth embodiment, the first lens 1010, the second lens 1020, and the third lens 1030 can be made of plastic materials with different optical properties from each other. The fourth lens 1040 can be made of the same plastic material as the second lens 1020, and the fifth lens 1050 and the sixth lens 1060 can be made of the same plastic material as the first lens 1010.

[0250] According to the tenth embodiment, the second lens 1020, the third lens 1030 and the fourth lens 1040 can each be a high refractive index lens having a refractive index of 1.6 or greater.

[0251] Furthermore, the Abbe number of each of the first lens 1010, the fifth lens 1050, and the sixth lens 1060 can be 50 or greater, the Abbe number of each of the second lens 1020 and the fourth lens 1040 can be 20 or greater and less than 40, and the Abbe number of the third lens 1030 can be less than 20.

[0252] Table 20 below lists the aspherical coefficients of each lens included in the optical imaging system 1000 according to the tenth embodiment. According to the tenth embodiment, the object-side and image-side surfaces of the first lens 1010 to the sixth lens 1060 may be aspherical.

[0253] Table 20

[0254] Eleventh Embodiment

[0255] Figure 11A This is a configuration diagram showing an optical imaging system according to the eleventh embodiment of the present disclosure. Figure 11B This is a graph showing the aberration characteristics of an optical imaging system according to the eleventh embodiment of the present disclosure.

[0256] The optical imaging system 1100 according to the eleventh embodiment may include a first lens 1110, a second lens 1120, a third lens 1130, a fourth lens 1140, a fifth lens 1150, and a sixth lens 1160 arranged sequentially along the optical axis of the optical imaging system 1100 from the object side of the optical imaging system 1100 toward the imaging surface IP of the optical imaging system 1100, and may also include a filter F disposed on the image side of the sixth lens 1160 and an image sensor IS including the imaging surface IP. Furthermore, an aperture stop (not shown) may be disposed between the third lens 1130 and the fourth lens 1140.

[0257] Table 21 below lists the characteristics of each of the lenses and other elements included in the optical imaging system 1100 according to the eleventh embodiment.

[0258] Table 21

[0259] According to the eleventh embodiment, the first lens 1110 and the second lens 1120 can be D-shaped cut lenses.

[0260] According to the eleventh embodiment, lenses with opposite refractive powers can be arranged in an alternating order. For example, the first lens 1110 can have positive refractive power, the second lens 1120 can have negative refractive power, the third lens 1130 can have positive refractive power, the fourth lens 1140 can have negative refractive power, the fifth lens 1150 can have positive refractive power, and the sixth lens 1160 can have negative refractive power.

[0261] According to the eleventh embodiment, the object-side and image-side surfaces of the first lens 1110 may be convex in their respective paraxial regions, and the object-side and image-side surfaces of the second lens 1120 may be concave in their respective paraxial regions. The object-side surfaces of the third lens 1130 and the fourth lens 1140 may be convex in their respective paraxial regions, and the image-side surfaces of the third lens 1130 and the fourth lens 1140 may be concave in their respective paraxial regions. The object-side and image-side surfaces of the fifth lens 1150 may be convex in their respective paraxial regions. The object-side surface of the sixth lens 1160 may be convex in its paraxial region, and the image-side surface of the sixth lens 1160 may be concave in its paraxial region.

[0262] According to the eleventh embodiment, the first lens 1110, the second lens 1120, and the third lens 1130 can be made of plastic materials with different optical properties from each other. The fourth lens 1140 can be made of the same plastic material as the second lens 1120, and the fifth lens 1150 and the sixth lens 1160 can be made of the same plastic material as the first lens 1110.

[0263] According to the eleventh embodiment, the second lens 1120, the third lens 1130 and the fourth lens 1140 may each be a high refractive index lens having a refractive index of 1.6 or greater.

[0264] Furthermore, the Abbe number of each of the first lens 1110, the fifth lens 1150 and the sixth lens 1160 can be 50 or greater, the Abbe number of each of the second lens 1120 and the fourth lens 1140 can be 20 or greater and less than 40, and the Abbe number of the third lens 1130 can be less than 20.

[0265] Table 22 below lists the aspherical coefficients of each lens included in the optical imaging system 1100 according to the eleventh embodiment. According to the eleventh embodiment, the object-side and image-side surfaces of the first lens 1110 to the sixth lens 1160 may be aspherical.

[0266] Table 22

[0267] Twelfth Embodiment

[0268] Figure 12A This is a configuration diagram showing an optical imaging system according to the twelfth embodiment of the present disclosure. Figure 12B This is a graph showing the aberration characteristics of an optical imaging system according to the twelfth embodiment of the present disclosure.

[0269] The optical imaging system 1200 according to the twelfth embodiment may include a first lens 1210, a second lens 1220, a third lens 1230, a fourth lens 1240, a fifth lens 1250, and a sixth lens 1260 arranged sequentially along the optical axis of the optical imaging system 1200 from the object side of the optical imaging system 1200 toward the imaging surface IP of the optical imaging system 1200, and may also include a filter F disposed on the image side of the sixth lens 1260 and an image sensor IS including the imaging surface IP. Furthermore, an aperture stop (not shown) may be disposed between the third lens 1230 and the fourth lens 1240.

[0270] Table 23 below lists the characteristics of each of the lenses and other elements included in the optical imaging system 1200 according to the twelfth embodiment.

[0271] Table 23

[0272] According to the twelfth embodiment, the first lens 1210 and the second lens 1220 can be D-shaped cut lenses.

[0273] According to the twelfth embodiment, the first lens 1210 may have positive refractive power, the second lens 1220 may have negative refractive power, the third lens 1230 may have positive refractive power, the fourth lens 1240 may have positive refractive power, the fifth lens 1250 may have negative refractive power, and the sixth lens 1260 may have positive refractive power.

[0274] According to the twelfth embodiment, the object-side and image-side surfaces of the first lens 1210 may be convex in their respective paraxial regions, and the object-side and image-side surfaces of the second lens 1220 may be concave in their respective paraxial regions. The object-side surface of the third lens 1230 may be convex in its paraxial region, and the image-side surface of the third lens 1230 may be concave in its paraxial region. The object-side and image-side surfaces of the fourth lens 1240 may be convex in their respective paraxial regions. The object-side and image-side surfaces of the fifth lens 1250 may be concave in their respective paraxial regions. The object-side surface of the sixth lens 1260 may be convex in its paraxial region, and the image-side surface of the sixth lens 1260 may be concave in its paraxial region. Furthermore, each of the object-side and image-side surfaces of the sixth lens 1260 may have a point of inflection.

[0275] According to the twelfth embodiment, the first lens 1210, the second lens 1220, the fourth lens 1240, and the sixth lens 1260 can be made of plastic materials with different optical properties from each other. The third lens 1230 can be made of the same plastic material as the first lens 1210, and the fifth lens 1250 can be made of the same plastic material as the second lens 1220.

[0276] According to the twelfth embodiment, the second lens 1220, the fourth lens 1240 and the fifth lens 1250 may each be a high refractive index lens having a refractive index of 1.6 or greater.

[0277] Furthermore, the Abbe number of each of the first lens 1210, the third lens 1230 and the sixth lens 1260 may be 50 or greater, the Abbe number of each of the second lens 1220 and the fifth lens 1250 may be 20 or greater and less than 40, and the Abbe number of the fourth lens 1240 may be less than 20.

[0278] Table 24 below lists the aspherical coefficients of each lens included in the optical imaging system 1200 according to the twelfth embodiment. According to the twelfth embodiment, the object-side and image-side surfaces of the first lens 1210 to the sixth lens 1260 may be aspherical.

[0279] Table 24

[0280] Thirteenth Embodiment

[0281] Figure 13A This is a configuration diagram showing an optical imaging system according to a thirteenth embodiment of the present disclosure. Figure 13B This is a graph showing the aberration characteristics of an optical imaging system according to the thirteenth embodiment of the present disclosure.

[0282] The optical imaging system 1300 according to the thirteenth embodiment may include a first lens 1310, a second lens 1320, a third lens 1330, a fourth lens 1340, a fifth lens 1350, and a sixth lens 1360 arranged sequentially along the optical axis of the optical imaging system 1300 from the object side of the optical imaging system 1300 toward the imaging surface IP of the optical imaging system 1300, and may also include a filter F disposed on the image side of the sixth lens 1360 and an image sensor IS including the imaging surface IP. Furthermore, an aperture stop (not shown) may be disposed between the third lens 1330 and the fourth lens 1340.

[0283] Table 25 below lists the characteristics of each of the lenses and other elements included in the optical imaging system 1300 according to the thirteenth embodiment.

[0284] Table 25

[0285] According to the thirteenth embodiment, the first lens 1310 and the second lens 1320 can be D-shaped cut lenses.

[0286] According to the thirteenth embodiment, the first lens 1310 may have positive refractive power, the second lens 1320 may have negative refractive power, the third lens 1330 may have positive refractive power, the fourth lens 1340 may have positive refractive power, the fifth lens 1350 may have negative refractive power, and the sixth lens 1360 may have positive refractive power.

[0287] According to the thirteenth embodiment, the object-side surface of the first lens 1310, the object-side surface of the second lens 1320, and the object-side surface of the third lens 1330 may be convex in their respective paraxial regions, and the image-side surface of the first lens 1310, the image-side surface of the second lens 1320, and the image-side surface of the third lens 1330 may be concave in their respective paraxial regions. The object-side surface and image-side surface of the fourth lens 1340 may be convex in their respective paraxial regions. The object-side surface and image-side surface of the fifth lens 1350 may be concave in their respective paraxial regions. The object-side surface of the sixth lens 1360 may be convex in its paraxial region, and the image-side surface of the sixth lens 1360 may be concave in its paraxial region.

[0288] According to the thirteenth embodiment, the first lens 1310, the second lens 1320, the fourth lens 1340, and the sixth lens 1360 can be made of plastic materials with different optical properties from each other. The third lens 1330 can be made of the same plastic material as the first lens 1310, and the fifth lens 1350 can be made of the same plastic material as the second lens 1320.

[0289] According to the thirteenth embodiment, the second lens 1320, the fourth lens 1340, and the fifth lens 1350 can each be a high refractive index lens having a refractive index of 1.6 or greater.

[0290] Furthermore, the Abbe number of each of the first lens 1310, the third lens 1330 and the sixth lens 1360 can be 50 or greater, the Abbe number of each of the second lens 1320 and the fifth lens 1350 can be 20 or greater and less than 40, and the Abbe number of the fourth lens 1340 can be less than 20.

[0291] Table 26 below lists the aspherical coefficients of each lens included in the optical imaging system 1300 according to the thirteenth embodiment. According to the thirteenth embodiment, the object-side and image-side surfaces of the first lens 1310 to the sixth lens 1360 may be aspherical.

[0292] Table 26

[0293] Fourteenth Embodiment

[0294] Figure 14A This is a configuration diagram showing an optical imaging system according to the fourteenth embodiment of the present disclosure. Figure 14B This is a graph showing the aberration characteristics of an optical imaging system according to the fourteenth embodiment of the present disclosure.

[0295] The optical imaging system 1400 according to the fourteenth embodiment may include a first lens 1410, a second lens 1420, a third lens 1430, a fourth lens 1440, a fifth lens 1450, and a sixth lens 1460 arranged sequentially along the optical axis of the optical imaging system 1400 from the object side of the optical imaging system 1400 toward the imaging surface IP of the optical imaging system 1400, and may also include a filter F disposed on the image side of the sixth lens 1460 and an image sensor IS including the imaging surface IP. Furthermore, an aperture stop (not shown) may be disposed between the third lens 1430 and the fourth lens 1440.

[0296] Table 27 below lists the characteristics of each of the lenses and other elements included in the optical imaging system 1400 according to the fourteenth embodiment.

[0297] Table 27

[0298] According to the fourteenth embodiment, the first lens 1410 and the second lens 1420 may be D-shaped cut lenses.

[0299] According to the fourteenth embodiment, the first lens 1410 may have positive refractive power, the second lens 1420 may have negative refractive power, the third lens 1430 may have positive refractive power, the fourth lens 1440 may have positive refractive power, the fifth lens 1450 may have negative refractive power, and the sixth lens 1460 may have negative refractive power.

[0300] According to the fourteenth embodiment, the object-side surface of the first lens 1410, the object-side surface of the second lens 1420, and the object-side surface of the third lens 1430 may be convex in their respective paraxial regions, and the image-side surface of the first lens 1410, the image-side surface of the second lens 1420, and the image-side surface of the third lens 1430 may be concave in their respective paraxial regions. The object-side surface and image-side surface of the fourth lens 1440 may be convex in their respective paraxial regions. The object-side surface and image-side surface of the fifth lens 1450 may be concave in their respective paraxial regions. The object-side surface of the sixth lens 1460 may be convex in its paraxial region, and the image-side surface of the sixth lens 1460 may be concave in its paraxial region.

[0301] According to the fourteenth embodiment, the first lens 1410, the second lens 1420, the fourth lens 1440, and the sixth lens 1460 can be made of plastic materials with different optical properties from each other. The third lens 1430 can be made of the same plastic material as the first lens 1410, and the fifth lens 1450 can be made of the same plastic material as the second lens 1420.

[0302] According to the fourteenth embodiment, the second lens 1420, the fourth lens 1440, and the fifth lens 1450 may each be a high refractive index lens having a refractive index of 1.6 or greater.

[0303] Furthermore, the Abbe number of each of the first lens 1410, the third lens 1430, and the sixth lens 1460 may be 50 or greater, the Abbe number of each of the second lens 1420 and the fifth lens 1450 may be 20 or greater and less than 40, and the Abbe number of the fourth lens 1440 may be less than 20.

[0304] Table 28 below lists the aspherical coefficients of each lens included in the optical imaging system 1400 according to the fourteenth embodiment. According to the fourteenth embodiment, the object-side and image-side surfaces of the first lens 1410 to the sixth lens 1460 may be aspherical.

[0305] Table 28

[0306] Fifteenth Embodiment

[0307] Figure 15A This is a configuration diagram showing an optical imaging system according to the fifteenth embodiment of the present disclosure. Figure 15B This is a graph showing the aberration characteristics of an optical imaging system according to the fifteenth embodiment of the present disclosure.

[0308] The optical imaging system 1500 according to the fifteenth embodiment may include a first lens 1510, a second lens 1520, a third lens 1530, a fourth lens 1540, a fifth lens 1550, and a sixth lens 1560 arranged sequentially along the optical axis of the optical imaging system 1500 from the object side of the optical imaging system 1500 toward the imaging surface IP of the optical imaging system 1500, and may also include a filter F disposed on the image side of the sixth lens 1560 and an image sensor IS including the imaging surface IP. Furthermore, an aperture stop (not shown) may be disposed between the third lens 1530 and the fourth lens 1540.

[0309] Table 29 below lists the characteristics of each of the lenses and other elements included in the optical imaging system 1500 according to the fifteenth embodiment.

[0310] Table 29

[0311] According to the fifteenth embodiment, the first lens 1510 and the second lens 1520 may be D-shaped cut lenses.

[0312] According to the fifteenth embodiment, the first lens 1510 may have positive refractive power, the second lens 1520 may have negative refractive power, the third lens 1530 may have positive refractive power, the fourth lens 1540 may have positive refractive power, the fifth lens 1550 may have negative refractive power, and the sixth lens 1560 may have negative refractive power.

[0313] According to the fifteenth embodiment, the object-side surface of the first lens 1510, the object-side surface of the second lens 1520, and the object-side surface of the third lens 1530 may be convex in their respective paraxial regions, and the image-side surface of the first lens 1510, the image-side surface of the second lens 1520, and the image-side surface of the third lens 1530 may be concave in their respective paraxial regions. The object-side surface and image-side surface of the fourth lens 1540 may be convex in their respective paraxial regions. The object-side surface and image-side surface of the fifth lens 1550 may be concave in their respective paraxial regions. The object-side surface of the sixth lens 1560 may be convex in its paraxial region, and the image-side surface of the sixth lens 1560 may be concave in its paraxial region.

[0314] According to the fifteenth embodiment, the first lens 1510, the second lens 1520, the fourth lens 1540, and the sixth lens 1560 can be made of plastic materials with different optical properties from each other. The third lens 1530 can be made of the same plastic material as the first lens 1510, and the fifth lens 1550 can be made of the same plastic material as the second lens 1520.

[0315] According to the fifteenth embodiment, the second lens 1520, the fourth lens 1540, and the fifth lens 1550 may each be a high refractive index lens having a refractive index of 1.6 or greater.

[0316] Furthermore, the Abbe number of each of the first lens 1510, the third lens 1530 and the sixth lens 1560 may be 50 or greater, the Abbe number of each of the second lens 1520 and the fifth lens 1550 may be 20 or greater and less than 40, and the Abbe number of the fourth lens 1540 may be less than 20.

[0317] Table 30 below lists the aspherical coefficients of each lens included in the optical imaging system 1500 according to the fifteenth embodiment. According to the fifteenth embodiment, the object-side and image-side surfaces of the first lens 1510 to the sixth lens 1560 may be aspherical.

[0318] Table 30

[0319] Sixteenth Embodiment

[0320] Figure 16A This is a configuration diagram showing an optical imaging system according to a sixteenth embodiment of the present disclosure. Figure 16B This is a graph showing the aberration characteristics of an optical imaging system according to the sixteenth embodiment of the present disclosure.

[0321] The optical imaging system 1600 according to the sixteenth embodiment may include a first lens 1610, a second lens 1620, a third lens 1630, a fourth lens 1640, a fifth lens 1650, and a sixth lens 1660 arranged sequentially along the optical axis of the optical imaging system 1600 from the object side of the optical imaging system 1600 toward the imaging surface IP of the optical imaging system 1600, and may also include a filter F disposed on the image side of the sixth lens 1660 and an image sensor IS including the imaging surface IP. Furthermore, an aperture stop (not shown) may be disposed between the third lens 1630 and the fourth lens 1640.

[0322] Table 31 below lists the characteristics of each of the lenses and other elements included in the optical imaging system 1600 according to the sixteenth embodiment.

[0323] Table 31

[0324] According to the sixteenth embodiment, the first lens 1610 and the second lens 1620 may be D-shaped cut lenses.

[0325] According to the sixteenth embodiment, the first lens 1610 may have positive refractive power, the second lens 1620 may have negative refractive power, the third lens 1630 may have positive refractive power, the fourth lens 1640 may have positive refractive power, the fifth lens 1650 may have negative refractive power, and the sixth lens 1660 may have negative refractive power.

[0326] According to the sixteenth embodiment, the object-side surface of the first lens 1610, the object-side surface of the second lens 1620, and the object-side surface of the third lens 1630 may be convex in their respective paraxial regions, and the image-side surface of the first lens 1610, the second lens 1620, and the third lens 1630 may be concave in their respective paraxial regions. The object-side surface and image-side surface of the fourth lens 1640 may be convex in their respective paraxial regions. The object-side surface and image-side surface of the fifth lens 1650 may be concave in their respective paraxial regions. The object-side surface of the sixth lens 1660 may be convex in its paraxial region, and the image-side surface of the sixth lens 1660 may be concave in its paraxial region. Furthermore, each of the object-side surface and image-side surface of the sixth lens 1660 may have a point of inflection.

[0327] According to the sixteenth embodiment, the first lens 1610, the second lens 1620, the fourth lens 1640, and the sixth lens 1660 can be made of plastic materials with different optical properties from each other. The third lens 1630 can be made of the same plastic material as the first lens 1610, and the fifth lens 1650 can be made of the same plastic material as the second lens 1620.

[0328] According to the sixteenth embodiment, the second lens 1620, the fourth lens 1640, and the fifth lens 1650 may each be a high refractive index lens having a refractive index of 1.6 or greater.

[0329] Furthermore, the Abbe number of each of the first lens 1610, the third lens 1630 and the sixth lens 1660 may be 50 or greater, the Abbe number of each of the second lens 1620 and the fifth lens 1650 may be 20 or greater and less than 40, and the Abbe number of the fourth lens 1640 may be less than 20.

[0330] Table 32 below lists the aspherical coefficients of each lens included in the optical imaging system 1600 according to the sixteenth embodiment. According to the sixteenth embodiment, the object-side and image-side surfaces of the first lens 1610 to the sixth lens 1660 may be aspherical.

[0331] Table 32

[0332] Seventeenth Embodiment

[0333] Figure 17A This is a configuration diagram showing an optical imaging system according to the seventeenth embodiment of the present disclosure. Figure 17B This is a graph showing the aberration characteristics of an optical imaging system according to the seventeenth embodiment of the present disclosure.

[0334] The optical imaging system 1700 according to the seventeenth embodiment may include a first lens 1710, a second lens 1720, a third lens 1730, a fourth lens 1740, a fifth lens 1750, and a sixth lens 1760 arranged sequentially along the optical axis of the optical imaging system 1700 from the object side of the optical imaging system 1700 toward the imaging surface IP of the optical imaging system 1700, and may also include a filter F disposed on the image side of the sixth lens 1760 and an image sensor IS including the imaging surface IP. Furthermore, an aperture stop (not shown) may be disposed between the third lens 1730 and the fourth lens 1740.

[0335] Table 33 below lists the characteristics of each of the lenses and other elements included in the optical imaging system 1700 according to the seventeenth embodiment.

[0336] Table 33

[0337] According to the seventeenth embodiment, the first lens 1710 and the second lens 1720 can be D-shaped cut lenses.

[0338] According to the seventeenth embodiment, the first lens 1710 may have positive refractive power, the second lens 1720 may have negative refractive power, the third lens 1730 may have positive refractive power, the fourth lens 1740 may have positive refractive power, the fifth lens 1750 may have negative refractive power, and the sixth lens 1760 may have negative refractive power.

[0339] According to the seventeenth embodiment, the object-side surface of the first lens 1710, the object-side surface of the second lens 1720, and the object-side surface of the third lens 1730 may be convex in their respective paraxial regions, and the image-side surface of the first lens 1710, the image-side surface of the second lens 1720, and the image-side surface of the third lens 1730 may be concave in their respective paraxial regions. The object-side surface and image-side surface of the fourth lens 1740 may be convex in their respective paraxial regions. The object-side surface and image-side surface of the fifth lens 1750 may be concave in their respective paraxial regions. The object-side surface of the sixth lens 1760 may be convex in its paraxial region, and the image-side surface of the sixth lens 1760 may be concave in its paraxial region.

[0340] According to the seventeenth embodiment, the first lens 1710, the second lens 1720, the fourth lens 1740, and the sixth lens 1760 can be made of plastic materials with different optical properties from each other. The third lens 1730 can be made of the same plastic material as the first lens 1710, and the fifth lens 1750 can be made of the same plastic material as the second lens 1720.

[0341] According to the seventeenth embodiment, the second lens 1720, the fourth lens 1740, and the fifth lens 1750 may each be a high refractive index lens having a refractive index of 1.6 or greater.

[0342] Furthermore, the Abbe number of each of the first lens 1710, the third lens 1730, and the sixth lens 1760 may be 50 or greater, the Abbe number of each of the second lens 1720 and the fifth lens 1750 may be 20 or greater and less than 40, and the Abbe number of the fourth lens 1740 may be less than 20.

[0343] Table 34 below lists the aspherical coefficients of each lens included in the optical imaging system 1700 according to the seventeenth embodiment. According to the seventeenth embodiment, the object-side and image-side surfaces of the first lens 1710 to the sixth lens 1760 may be aspherical.

[0344] Table 34

[0345] Eighteenth Embodiment

[0346] Figure 18A This is a configuration diagram showing an optical imaging system according to the eighteenth embodiment of the present disclosure. Figure 18B This is a graph showing the aberration characteristics of an optical imaging system according to the eighteenth embodiment of the present disclosure.

[0347] The optical imaging system 1800 according to the eighteenth embodiment may include a first lens 1810, a second lens 1820, a third lens 1830, a fourth lens 1840, a fifth lens 1850, and a sixth lens 1860 arranged sequentially along the optical axis of the optical imaging system 1800 from the object side of the optical imaging system 1800 toward the imaging surface IP of the optical imaging system 1800, and may also include a filter F disposed on the image side of the sixth lens 1860 and an image sensor IS including the imaging surface IP. Furthermore, an aperture stop (not shown) may be disposed between the third lens 1830 and the fourth lens 1840.

[0348] Table 35 below lists the characteristics of each of the lenses and other elements included in the optical imaging system 1800 according to the eighteenth embodiment.

[0349] Table 35

[0350] According to the eighteenth embodiment, the first lens 1810 and the second lens 1820 can be D-shaped cut lenses.

[0351] According to the eighteenth embodiment, the first lens 1810 may have positive refractive power, the second lens 1820 may have negative refractive power, the third lens 1830 may have positive refractive power, the fourth lens 1840 may have positive refractive power, the fifth lens 1850 may have negative refractive power, and the sixth lens 1860 may have positive refractive power.

[0352] According to the eighteenth embodiment, the object-side and image-side surfaces of the first lens 1810 may be convex in their respective paraxial regions. The object-side and image-side surfaces of the second lens 1820 may be concave in their respective paraxial regions. The object-side surface of the third lens 1830 may be convex in its paraxial region, and the image-side surface of the third lens 1830 may be concave in its paraxial region. The object-side and image-side surfaces of the fourth lens 1840 may be convex in their respective paraxial regions. The object-side and image-side surfaces of the fifth lens 1850 may be concave in their respective paraxial regions. The object-side surface of the sixth lens 1860 may be convex in its paraxial region, and the image-side surface of the sixth lens 1860 may be concave in its paraxial region. Furthermore, each of the object-side and image-side surfaces of the sixth lens 1860 may have a point of inflection.

[0353] According to the eighteenth embodiment, the first lens 1810, the second lens 1820, the fourth lens 1840, and the sixth lens 1860 can be made of plastic materials with different optical properties from each other. The third lens 1830 can be made of the same plastic material as the first lens 1810, and the fifth lens 1850 can be made of the same plastic material as the second lens 1820.

[0354] According to the eighteenth embodiment, the second lens 1820, the fourth lens 1840, and the fifth lens 1850 may each be a high refractive index lens having a refractive index of 1.6 or greater.

[0355] Furthermore, the Abbe number of each of the first lens 1810, the third lens 1830, and the sixth lens 1860 may be 50 or greater, the Abbe number of each of the second lens 1820 and the fifth lens 1850 may be 20 or greater and less than 40, and the Abbe number of the fourth lens 1840 may be less than 20.

[0356] Table 36 below lists the aspherical coefficients of each lens included in the optical imaging system 1800 according to the eighteenth embodiment. According to the eighteenth embodiment, the object-side and image-side surfaces of the first lens 1810 to the sixth lens 1860 may be aspherical.

[0357] Table 36

[0358] Nineteenth Embodiment

[0359] Figure 19A This is a configuration diagram showing an optical imaging system according to the nineteenth embodiment of the present disclosure. Figure 19B This is a graph showing the aberration characteristics of an optical imaging system according to the nineteenth embodiment of the present disclosure.

[0360] The optical imaging system 1900 according to the nineteenth embodiment may include a first lens 1910, a second lens 1920, a third lens 1930, a fourth lens 1940, a fifth lens 1950, and a sixth lens 1960 arranged sequentially along the optical axis of the optical imaging system 1900 from the object side of the optical imaging system 1900 toward the imaging surface IP of the optical imaging system 1900, and may also include a filter F disposed on the image side of the sixth lens 1960 and an image sensor IS including the imaging surface IP. Furthermore, an aperture stop (not shown) may be disposed between the third lens 1930 and the fourth lens 1940.

[0361] Table 37 below lists the characteristics of each of the lenses and other elements included in the optical imaging system 1900 according to the nineteenth embodiment.

[0362] Table 37

[0363] According to the nineteenth embodiment, the first lens 1910 and the second lens 1920 can be D-shaped cut lenses.

[0364] According to the nineteenth embodiment, the first lens 1910 may have positive refractive power, the second lens 1920 may have negative refractive power, the third lens 1930 may have positive refractive power, the fourth lens 1940 may have positive refractive power, the fifth lens 1950 may have negative refractive power, and the sixth lens 1960 may have positive refractive power.

[0365] According to the nineteenth embodiment, the object-side and image-side surfaces of the first lens 1910 may be convex in their respective paraxial regions. The object-side and image-side surfaces of the second lens 1920 may be concave in their respective paraxial regions. The object-side surface of the third lens 1930 may be convex in its paraxial region, and the image-side surface of the third lens 1930 may be concave in its paraxial region. The object-side and image-side surfaces of the fourth lens 1940 may be convex in their respective paraxial regions. The object-side surfaces of the fifth lens 1950 and the sixth lens 1960 may be convex in their respective paraxial regions, and the image-side surfaces of the fifth lens 1950 and the sixth lens 1960 may be concave in their respective paraxial regions. Furthermore, each of the object-side and image-side surfaces of the sixth lens 1960 may have a point of inflection.

[0366] According to the nineteenth embodiment, the first lens 1910, the second lens 1920, the fourth lens 1940, and the sixth lens 1960 can be made of plastic materials with different optical properties from each other. The third lens 1930 can be made of the same plastic material as the first lens 1910, and the fifth lens 1950 can be made of the same plastic material as the second lens 1920.

[0367] According to the nineteenth embodiment, the second lens 1920, the fourth lens 1940, and the fifth lens 1950 may each be a high refractive index lens having a refractive index of 1.6 or greater.

[0368] Furthermore, the Abbe number of each of the first lens 1910, the third lens 1930, and the sixth lens 1960 may be 50 or greater, the Abbe number of each of the second lens 1920 and the fifth lens 1950 may be 20 or greater and less than 40, and the Abbe number of the fourth lens 1940 may be less than 20.

[0369] Table 38 below lists the aspherical coefficients of each lens included in the optical imaging system 1900 according to the nineteenth embodiment. According to the nineteenth embodiment, the object-side and image-side surfaces of the first lens 1910 to the sixth lens 1960 may be aspherical.

[0370] Table 38

[0371] Twentieth Embodiment

[0372] Figure 20A This is a configuration diagram showing an optical imaging system according to the twentieth embodiment of the present disclosure. Figure 20B This is a graph showing the aberration characteristics of an optical imaging system according to the twentieth embodiment of the present disclosure.

[0373] The optical imaging system 2000 according to the twentieth embodiment may include a first lens 2010, a second lens 2020, a third lens 2030, a fourth lens 2040, a fifth lens 2050, and a sixth lens 2060 arranged sequentially along the optical axis of the optical imaging system 2000 from the object side of the optical imaging system 2000 toward the imaging surface IP of the optical imaging system 2000. It may also include a filter F disposed on the image side of the sixth lens 2060 and an image sensor IS including the imaging surface IP. Furthermore, an aperture stop (not shown) may be disposed between the third lens 2030 and the fourth lens 2040.

[0374] Table 39 below lists the characteristics of each of the lenses and other elements included in the optical imaging system 2000 according to the twentieth embodiment.

[0375] Table 39

[0376] According to the twentieth embodiment, the first lens 2010 and the second lens 2020 can be D-shaped cut lenses.

[0377] According to the twentieth embodiment, the first lens 2010 may have positive refractive power, the second lens 2020 may have negative refractive power, the third lens 2030 may have positive refractive power, the fourth lens 2040 may have positive refractive power, the fifth lens 2050 may have negative refractive power, and the sixth lens 2060 may have negative refractive power.

[0378] According to the twentieth embodiment, the object-side and image-side surfaces of the first lens 2010 may be convex in their respective paraxial regions. The object-side surfaces of the second lens 2020 and the third lens 2030 may be convex in their respective paraxial regions, and the image-side surfaces of the second lens 2020 and the third lens 2030 may be concave in their respective paraxial regions. The object-side and image-side surfaces of the fourth lens 2040 may be convex in their respective paraxial regions. The object-side and image-side surfaces of the fifth lens 2050 may be concave in their respective paraxial regions. The object-side surface of the sixth lens 2060 may be convex in its paraxial region, and the image-side surface of the sixth lens 2060 may be concave in its paraxial region. Furthermore, each of the object-side and image-side surfaces of the sixth lens 2060 may have a point of inflection.

[0379] According to the twentieth embodiment, the first lens 2010, the second lens 2020, the fourth lens 2040, and the sixth lens 2060 can be made of plastic materials with different optical properties from each other. The third lens 2030 can be made of the same plastic material as the first lens 2010, and the fifth lens 2050 can be made of the same plastic material as the second lens 2020.

[0380] According to the twentieth embodiment, the second lens 2020, the fourth lens 2040, and the fifth lens 2050 can each be a high refractive index lens having a refractive index of 1.6 or greater.

[0381] Furthermore, the Abbe number of each of the first lens 2010, the third lens 2030 and the sixth lens 2060 can be 50 or greater, the Abbe number of each of the second lens 2020 and the fifth lens 2050 can be 20 or greater and less than 40, and the Abbe number of the fourth lens 2040 can be less than 20.

[0382] Table 40 below lists the aspherical coefficients of each lens included in the optical imaging system 2000 according to the twentieth embodiment. According to the twentieth embodiment, the object-side and image-side surfaces of the first lens 2010 to the sixth lens 2060 may be aspherical.

[0383] Table 40

[0384] Example 21

[0385] Figure 21A This is a configuration diagram showing an optical imaging system according to the twenty-first embodiment of the present disclosure. Figure 21B This is a graph showing the aberration characteristics of an optical imaging system according to the twenty-first embodiment of this disclosure.

[0386] The optical imaging system 2100 according to the twenty-first embodiment may include a first lens 2110, a second lens 2120, a third lens 2130, a fourth lens 2140, a fifth lens 2150, and a sixth lens 2160 arranged sequentially along the optical axis of the optical imaging system 2100 from the object side of the optical imaging system 2100 toward the imaging surface IP of the optical imaging system 2100, and may also include a filter F disposed on the image side of the sixth lens 2160 and an image sensor IS including the imaging surface IP. Furthermore, an aperture stop (not shown) may be disposed between the third lens 2130 and the fourth lens 2140.

[0387] Table 41 below lists the characteristics of each of the lenses and other elements included in the optical imaging system 2100 according to the twenty-first embodiment.

[0388] Table 41

[0389] According to the twenty-first embodiment, the first lens 2110 and the second lens 2120 can be D-shaped cut lenses.

[0390] According to the twenty-first embodiment, the first lens 2110 may have positive refractive power, the second lens 2120 may have negative refractive power, the third lens 2130 may have positive refractive power, the fourth lens 2140 may have positive refractive power, the fifth lens 2150 may have negative refractive power, and the sixth lens 2160 may have negative refractive power.

[0391] According to the twenty-first embodiment, the object-side surface of the first lens 2110 and the object-side surface of the second lens 2120 may be convex in their respective paraxial regions, and the image-side surface of the first lens 2110 and the image-side surface of the second lens 2120 may be concave in their respective paraxial regions. The object-side and image-side surfaces of the third lens 2130 and the fourth lens 2140 may be convex in their respective paraxial regions. The object-side and image-side surfaces of the fifth lens 2150 may be concave in their respective paraxial regions. The object-side surface of the sixth lens 2160 may be convex in its paraxial region, and the image-side surface of the sixth lens 2160 may be concave in its paraxial region.

[0392] According to the twenty-first embodiment, the first lens 2110, the second lens 2120, the fourth lens 2140, and the sixth lens 2160 can be made of plastic materials with different optical properties from each other. The third lens 2130 can be made of the same plastic material as the first lens 2110, and the fifth lens 2150 can be made of the same plastic material as the second lens 2120.

[0393] According to the twenty-first embodiment, the second lens 2120, the fourth lens 2140, and the fifth lens 2150 may each be a high refractive index lens having a refractive index of 1.6 or greater.

[0394] Furthermore, the Abbe number of each of the first lens 2110, the third lens 2130 and the sixth lens 2160 may be 50 or greater, the Abbe number of each of the second lens 2120 and the fifth lens 2150 may be 20 or greater and less than 40, and the Abbe number of the fourth lens 2140 may be less than 20.

[0395] Table 42 below lists the aspherical coefficients of each lens included in the optical imaging system 2100 according to the twenty-first embodiment. According to the twenty-first embodiment, the object-side and image-side surfaces of the first lens 2110 to the sixth lens 2160 may be aspherical.

[0396] Table 42

[0397] Example 22

[0398] Figure 22A This is a configuration diagram showing an optical imaging system according to the twenty-second embodiment of the present disclosure. Figure 22B This is a graph showing the aberration characteristics of an optical imaging system according to the twenty-second embodiment of this disclosure.

[0399] The optical imaging system 2200 according to the twenty-second embodiment may include a first lens 2210, a second lens 2220, a third lens 2230, a fourth lens 2240, a fifth lens 2250, and a sixth lens 2260 arranged sequentially along the optical axis of the optical imaging system 2200 from the object side of the optical imaging system 2200 toward the imaging surface IP of the optical imaging system 2200. It may also include a filter F disposed on the image side of the sixth lens 2260 and an image sensor IS including the imaging surface IP. Furthermore, an aperture stop (not shown) may be disposed between the third lens 2230 and the fourth lens 2240.

[0400] Table 43 below lists the characteristics of each of the lenses and other elements included in the optical imaging system 2200 according to the twenty-second embodiment.

[0401] Table 43

[0402] According to the twenty-second embodiment, the first lens 2210 and the second lens 2220 can be D-shaped cut lenses.

[0403] According to the twenty-second embodiment, the first lens 2210 may have positive refractive power, the second lens 2220 may have negative refractive power, the third lens 2230 may have positive refractive power, the fourth lens 2240 may have positive refractive power, the fifth lens 2250 may have negative refractive power, and the sixth lens 2260 may have negative refractive power.

[0404] According to the twenty-second embodiment, the object-side surface of the first lens 2210, the object-side surface of the second lens 2220, and the object-side surface of the third lens 2230 may be convex in their respective paraxial regions, and the image-side surface of the first lens 2210, the image-side surface of the second lens 2220, and the image-side surface of the third lens 2230 may be concave in their respective paraxial regions. The object-side surface and image-side surface of the fourth lens 2240 may be convex in their respective paraxial regions. The object-side surface and image-side surface of the fifth lens 2250 may be concave in their respective paraxial regions. The object-side surface of the sixth lens 2260 may be convex in its paraxial region, and the image-side surface of the sixth lens 2260 may be concave in its paraxial region.

[0405] According to the twenty-second embodiment, the first lens 2210, the second lens 2220, the fourth lens 2240, and the sixth lens 2260 can be made of plastic materials with different optical properties from each other. The third lens 2230 can be made of the same plastic material as the first lens 2210, and the fifth lens 2250 can be made of the same plastic material as the second lens 2220.

[0406] According to the twenty-second embodiment, the second lens 2220, the fourth lens 2240, and the fifth lens 2250 can each be a high refractive index lens having a refractive index of 1.6 or greater.

[0407] Furthermore, the Abbe number of each of the first lens 2210, the third lens 2230 and the sixth lens 2260 may be 50 or greater, the Abbe number of each of the second lens 2220 and the fifth lens 2250 may be 20 or greater and less than 40, and the Abbe number of the fourth lens 2240 may be less than 20.

[0408] Table 44 below lists the aspherical coefficients of each lens included in the optical imaging system 2200 according to the twenty-second embodiment. According to the twenty-second embodiment, the object-side and image-side surfaces of the first lens 2210 to the sixth lens 2260 may be aspherical.

[0409] Table 44

[0410] Tables 45 and 46 below list the optical and physical characteristics of the optical imaging systems according to the first to the twenty-second embodiments, and Tables 47 and 48 below list the values ​​of conditional expressions 1 to 9 of the optical imaging systems according to the first to the twenty-second embodiments.

[0411] Table 45

[0412] Table 46

[0413] Table 47

[0414] Table 48

[0415] Figure 23 This is an example of a D-shaped cut lens according to an embodiment of the present disclosure.

[0416] According to an embodiment, the first lens 2310 and the second lens 2320 can be configured as follows: Figure 23 The D-shaped cut lens shown. Figure 23In this configuration, the Y-axis direction can correspond to the module height, and the two edges of the first lens 2310 and the second lens 2320 in the Y-axis direction can be cut off to form straight edges. The diameters of the first lens 2310 and the second lens 2320 in the X-axis direction are the major axis diameters of the first lens 2310 and the second lens 2320, and the diameters of the first lens 2310 and the second lens 2320 in the Y-axis direction are the minor axis diameters of the first lens 2310 and the second lens 2320.

[0417] Figure 24 This is a configuration diagram of a telephoto camera according to an embodiment of the present disclosure.

[0418] Reference Figure 24 The optical imaging system 2400 according to the embodiment can be used in a folding system that includes a reflective member P that folds the optical path. For example, the reflective member P can be disposed on the object side of the optical imaging system 2400.

[0419] According to the foregoing embodiments, the increase in module thickness can be reduced, and high-quality images can be obtained in high magnification mode.

[0420] 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 a concave object-side surface in its paraxial region; The third lens has positive refractive power; The fourth lens has negative refractive power; The fifth lens has refractive power; as well as The sixth lens has a concave image-side surface in its paraxial region. The first lens, the second lens, the third lens, the fourth lens, the fifth lens, and the sixth lens are arranged sequentially 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 condition 0.6 ≤ CT1 / d2 ≤ 1.4 is satisfied, where CT1 is the thickness of the first lens along the optical axis, and d2 is the air gap between the second and third lenses along the optical axis. The optical imaging system has a total of six lenses.

2. 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 first lens is convex in its paraxial region.

3. The optical imaging system according to claim 1, wherein, The second lens has negative refractive power.

4. The optical imaging system according to claim 1, wherein, The fifth lens has positive refractive power, and the sixth lens has negative refractive power.

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

6. The optical imaging system according to claim 1, wherein, The first lens and the second lens are D-shaped cut lenses.

7. The optical imaging system according to claim 1, wherein, The second lens, the third lens, and the fourth lens each have a refractive index of 1.6 or greater.

8. The optical imaging system according to claim 1, wherein, The condition 0.1 ≤ IMH / f ≤ 0.4 is satisfied, where IMH is half the diagonal length of the imaging plane and f is the total focal length of the optical imaging system.

9. The optical imaging system according to claim 1, wherein, The condition 0.7 ≤ SD1 / IMH ≤ 1.0 is satisfied, where SD1 is the maximum effective radius of the object side of the first lens, and IMH is half the diagonal length of the imaging plane.

10. The optical imaging system according to claim 1, wherein, The condition 0.5 ≤ EPD / Td ≤ 0.9 is satisfied, where EPD is the entrance pupil diameter of the optical imaging system, and Td is the total distance along the optical axis from the object side of the first lens to the image side of the sixth lens.

11. An optical imaging system, including: The first lens has a convex image-side surface in its paraxial region; The second lens has negative refractive power; The third lens has positive refractive power; The fourth lens has negative refractive power; The fifth lens has positive refractive power and a convex object-side surface in its paraxial region; as well as The sixth lens has refractive power. The first lens, the second lens, the third lens, the fourth lens, the fifth lens, and the sixth lens are arranged sequentially 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 fifth lens has an Abbe number of 50 or greater. The condition 0.1 ≤ IMH / f ≤ 0.4 is satisfied, where IMH is half the diagonal length of the imaging plane, and f is the total focal length of the optical imaging system. The optical imaging system has a total of six lenses.

12. The optical imaging system according to claim 11, wherein, The condition 0.4 ≤ ΣAT / Td ≤ 0.6 is satisfied, where ΣAT is the sum of the air gaps along the optical axis between the first lens and the second lens, between the second lens and the third lens, between the third lens and the fourth lens, between the fourth lens and the fifth lens, and between the fifth lens and the sixth lens, and Td is the total distance along the optical axis from the object side of the first lens to the image side of the sixth lens.

13. The optical imaging system according to claim 11, wherein, The condition 0.7 ≤ CT1 / ET2 ≤ 1.5 is satisfied, where CT1 is the thickness of the first lens along the optical axis, and ET2 is the peripheral thickness of the second lens at the edge of the second lens.

14. The optical imaging system according to claim 11, wherein, The condition 0.5 < AR1 < 1.0 is satisfied, where AR1 is the ratio of the minor axis diameter of the first lens to the major axis diameter of the first lens.

15. The optical imaging system according to claim 11, wherein, The condition 0.6 ≤ f123 / f ≤ 1.2 is satisfied, where f123 is the composite focal length of the first lens, the second lens, and the third lens.

16. The optical imaging system according to claim 11, wherein, The object-side surface of the sixth lens is concave in its paraxial region.

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