Optical imaging system

Abstract

The present application relates to an optical imaging system, comprising, in order along an optical axis of the optical imaging system from an object side of the optical imaging system toward an imaging plane of the optical imaging system, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens, wherein the optical imaging system satisfies 0.5 < L1234TRavg / L7TR < 0.9, wherein L1234TRavg is an average value of total outer diameters of the first lens to the fourth lens, L7TR is a total outer diameter of the seventh lens, and L1234TRavg and L7TR are expressed in the same unit of measurement.

Description

[0001] This application is a divisional application of Chinese patent application No. 201910423454.2, filed on May 21, 2019.

[0002] Cross-references to related applications

[0003] This application claims priority to Korean Patent Application No. 10-2018-0061396, filed with the Korean Intellectual Property Office on May 29, 2018, and Korean Patent Application No. 10-2018-0106187, filed with the Korean Intellectual Property Office on September 5, 2018, the entire disclosure of which is incorporated herein by reference. Technical Field

[0004] This application relates to an optical imaging system comprising seven lenses. Background Technology

[0005] Mobile devices typically include cameras for video communication or image capture. However, due to space limitations within mobile devices, achieving high performance in such cameras is challenging.

[0006] Therefore, as the number of mobile terminals equipped with cameras increases, the demand for optical imaging systems that can improve the performance of camera modules without increasing camera size has increased. Summary of the Invention

[0007] The summary portion of this invention is intended to provide a brief overview of the chosen inventive 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, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens arranged sequentially in numerical order along the optical axis of the optical imaging system from the object side of the optical imaging system toward the imaging surface of the optical imaging system, wherein the optical imaging system satisfies 0.5 < L1234TRavg / L7TR < 0.9, where L1234TRavg is the average of the total outer diameters of the first to fourth lenses, L7TR is the total outer diameter of the seventh lens, and L1234TRavg and L7TR are expressed in the same unit of measurement.

[0009] The object-side surface of the first lens can bulge out.

[0010] The image-side surface of the first lens can be concave.

[0011] The image-side surface of the seventh lens can be concave.

[0012] The distance along the optical axis from the object side of the first lens to the imaging plane can be 6 mm or less.

[0013] At least one inflection point can be formed on either or both of the object-side and image-side surfaces of the sixth lens.

[0014] At least one inflection point can be formed on either or both of the object-side and image-side surfaces of the seventh lens.

[0015] The optical imaging system can also satisfy 0.1 < L1w / L7w < 0.3, where L1w is the weight of the first lens, L7w is the weight of the seventh lens, and L1w and L7w are expressed in the same unit of measurement.

[0016] The optical imaging system may also include a spacer disposed between the sixth and seventh lenses, and the optical imaging system may also satisfy 0.5 < S6d / f < 1.2, where S6d is the inner diameter of the spacer, f is the total focal length of the optical imaging system, and S6d and f are expressed in the same unit of measurement.

[0017] The optical imaging system can also satisfy 0.4 < L1TR / L7TR < 0.7, where L1TR is the total outer diameter of the first lens, and L1TR and L7TR are expressed in the same unit of measurement.

[0018] The optical imaging system can also meet the requirement of 0.5 < L1234TRavg / L7TR < 0.75.

[0019] The optical imaging system can also satisfy 0.5 < L12345TRavg / L7TR < 0.76, where L12345TRavg is the average of the total outer diameter of the first to fifth lenses, and L12345TRavg and L7TR are expressed in the same unit of measurement.

[0020] The second lens can have positive refractive power.

[0021] The third lens can have positive refractive power.

[0022] The fifth lens can have negative refractive power.

[0023] The paraxial region on the object side of the fifth lens can be concave or convex.

[0024] The paraxial region on the image side of the fifth lens can be concave or convex.

[0025] The paraxial region on the object side of the sixth lens can be concave or convex.

[0026] The paraxial region on the image side of the sixth lens can be concave or convex.

[0027] The paraxial region on the object side of the seventh lens can be concave or convex.

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

[0029] Figure 1 This is a view showing a first example of an optical imaging system.

[0030] Figure 2 It shows Figure 1 Aberration curves of optical imaging systems.

[0031] Figure 3 This is a view showing a second example of an optical imaging system.

[0032] Figure 4 It shows Figure 3 Aberration curves of optical imaging systems.

[0033] Figure 5 This is a view showing a third example of an optical imaging system.

[0034] Figure 6 It shows Figure 5 Aberration curves of optical imaging systems.

[0035] Figure 7 This is a view showing a fourth example of an optical imaging system.

[0036] Figure 8 It shows Figure 7 Aberration curves of optical imaging systems.

[0037] Figure 9 This is a view showing the fifth example of an optical imaging system.

[0038] Figure 10 It shows Figure 9 Aberration curves of optical imaging systems.

[0039] Figure 11 This is a view showing the sixth example of an optical imaging system.

[0040] Figure 12 It shows Figure 11 Aberration curves of optical imaging systems.

[0041] Figure 13 This is a view showing the seventh example of an optical imaging system.

[0042] Figure 14 It shows Figure 13 Aberration curves of optical imaging systems.

[0043] Figure 15 This is a view showing the eighth example of an optical imaging system.

[0044] Figure 16 It shows Figure 15 Aberration curves of optical imaging systems.

[0045] Figure 17 This is a view showing the ninth example of an optical imaging system.

[0046] Figure 18 It shows Figure 17 Aberration curves of optical imaging systems.

[0047] Figure 19 This is a view showing the tenth example of an optical imaging system.

[0048] Figure 20 It shows Figure 19 Aberration curves of optical imaging systems.

[0049] Figure 21 This is a view showing the eleventh example of an optical imaging system.

[0050] Figure 22 It shows Figure 21 Aberration curves of optical imaging systems.

[0051] Figure 23 This is a view showing the twelfth example of an optical imaging system.

[0052] Figure 24 It shows Figure 23 Aberration curves of optical imaging systems.

[0053] Figure 25 This is a view showing the thirteenth example of an optical imaging system.

[0054] Figure 26 It shows Figure 25 Aberration curves of optical imaging systems.

[0055] Figure 27 This is a view showing the fourteenth example of an optical imaging system.

[0056] Figure 28 It shows Figure 27 Aberration curves of optical imaging systems.

[0057] Figure 29 This is a view showing the fifteenth example of an optical imaging system.

[0058] Figure 30It shows Figure 29 Aberration curves of optical imaging systems.

[0059] Figure 31 This is a view showing the sixteenth example of an optical imaging system.

[0060] Figure 32 It shows Figure 31 Aberration curves of optical imaging systems.

[0061] Figure 33 This is a view showing the seventeenth example of an optical imaging system.

[0062] Figure 34 It shows Figure 33 Aberration curves of optical imaging systems.

[0063] Figure 35 This is a view showing the eighteenth example of an optical imaging system.

[0064] Figure 36 It shows Figure 35 Aberration curves of optical imaging systems.

[0065] Figure 37 This is a view showing the nineteenth example of an optical imaging system.

[0066] Figure 38 It shows Figure 37 Aberration curves of optical imaging systems.

[0067] Figure 39 This is a view showing the twentieth example of an optical imaging system.

[0068] Figure 40 It shows Figure 39 Aberration curves of optical imaging systems.

[0069] Figure 41 This is a view showing the twenty-first example of an optical imaging system.

[0070] Figure 42 It shows Figure 41 Aberration curves of optical imaging systems.

[0071] Figure 43 This is a view showing the twenty-second example of an optical imaging system.

[0072] Figure 44 It shows Figure 43 Aberration curves of optical imaging systems.

[0073] Figure 45 This is a view showing the twenty-third example of an optical imaging system.

[0074] Figure 46 It shows Figure 45 Aberration curves of optical imaging systems.

[0075] Figure 47 This is a view showing the twenty-fourth example of an optical imaging system.

[0076] Figure 48 It shows Figure 47 Aberration curves of optical imaging systems.

[0077] Figure 49 This is a view showing the twenty-fifth example of an optical imaging system.

[0078] Figure 50 It shows Figure 49 Aberration curves of optical imaging systems.

[0079] Figure 51 This is a view showing the twenty-sixth example of an optical imaging system.

[0080] Figure 52 It shows Figure 51 Aberration curves of optical imaging systems.

[0081] Figure 53 This is a view showing the twenty-seventh example of an optical imaging system.

[0082] Figure 54 It shows Figure 53 Aberration curves of optical imaging systems.

[0083] Figure 55 This is a view showing the twenty-eighth example of an optical imaging system.

[0084] Figure 56 It shows Figure 55 Aberration curves of optical imaging systems.

[0085] Figure 57 This is a view showing the twenty-ninth example of an optical imaging system.

[0086] Figure 58 It shows Figure 57 Aberration curves of optical imaging systems.

[0087] Figure 59 and Figure 60 This is a cross-sectional view showing an example of an optical imaging system and lens barrel connected to each other.

[0088] Figure 61 This is a cross-sectional view showing an example of the seventh lens.

[0089] Figure 62 This is a cross-sectional view showing an example of the shape of the ribs of a lens.

[0090] Throughout the accompanying drawings and detailed description, 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

[0091] The following detailed description is provided to assist the reader in gaining a comprehensive understanding of the methods, apparatus, and / or systems described herein. However, various changes, modifications, and equivalents of the methods, apparatus, and / or systems described herein will be apparent after understanding the disclosure of this application. For example, the order of operations described herein is merely illustrative, except for operations that must occur in a specific order, and is not limited to the order set forth herein, and obvious changes may be made after understanding the disclosure of this application. Furthermore, for clarity and conciseness, descriptions of features well-known in the art may be omitted.

[0092] 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 feasible ways of implementing the methods, apparatus, and / or systems described herein, which will be apparent upon understanding the disclosure of this application.

[0093] 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 may be no other elements between the element and the other element.

[0094] As used herein, the term “and / or” includes any one of the associated listed items and any combination of any two or more items.

[0095] Although terms such as “first,” “second,” and “third” may be used herein to describe various components, parts, regions, layers, or sections, these components, parts, regions, layers, or sections are not limited by these terms. Rather, these terms are used only to distinguish one component, part, region, layer, or section from another. Therefore, without departing from the teachings of the examples described herein, the first component, first part, first region, first layer, or first section mentioned in the examples may also be referred to as a second component, second part, second region, second layer, or second section.

[0096] Spatial relative terms such as “above,” “above,” “below,” and “below” may be used herein for descriptive convenience to describe the relationship of one element relative to another, as shown in the accompanying drawings. In addition to covering the orientation depicted in the drawings, these spatial relative terms are intended to also cover different orientations of the device in use or operation. For example, if the device in the drawings is flipped, an element described as being “above” or “above” another element would be located “below” or “below” that other element. Thus, depending on the spatial orientation of the device, the term “above” covers both “above” and “below” orientations. The device may also be oriented in other ways (e.g., rotated 90 degrees or in other orientations), and the spatial relative terms used herein should be interpreted accordingly.

[0097] The terminology used in this application is for describing various examples only and is not intended to limit this disclosure. Unless the context clearly indicates otherwise, the articles “a,” “an,” and “the” are intended to include the plural form as well. The terms “comprising,” “including,” and “having” indicate the presence of stated features, numbers, operations, components, elements, and / or combinations thereof, but do not preclude the presence or addition of one or more other features, numbers, operations, components, elements, and / or combinations thereof.

[0098] For ease of explanation, the thickness, size, and shape of the lenses shown in the accompanying drawings may be slightly exaggerated. Furthermore, the spherical or aspherical shapes of the lenses described in the detailed description and shown in the accompanying drawings are merely examples. That is, the spherical or aspherical shapes of the lenses are not limited to the examples described herein.

[0099] The radius of curvature, lens thickness, distances between elements including the lens or surface, effective half-aperture of the lens, diameters, thicknesses, and lengths of various elements are expressed in millimeters (mm), while angles are expressed in degrees. The lens thickness and the distances between elements including the lens or surface are measured along the optical axis of the optical imaging system.

[0100] As used in this application, the term "effective half-aperture" refers to the radius of the portion of the surface (object-side or image-side) through which light actually passes. Therefore, the effective half-aperture can be equal to the radius of the optical portion of the lens, or smaller than the radius of the optical portion if light does not pass through the edge portion of the lens's optical portion. The object-side and image-side of the lens may have different effective half-apertures.

[0101] In this application, unless otherwise stated, references to the shape of a lens surface refer to the shape of the paraxial region of the lens. The paraxial region of a lens surface is the central portion of the lens surface surrounding the optical axis of the lens surface, wherein light rays incident on the lens surface form a small angle θ with the optical axis, and the following approximations are valid: sin θ ≈ θ, tan θ ≈ θ, and cos θ ≈ 1.

[0102] For example, the description of a lens's object-side surface being convex means that at least the paraxial region of the lens's object-side surface is convex, and the description of a lens's image-side surface being concave means that at least the paraxial region of the lens's image-side surface is concave. Therefore, even if the object-side surface of a lens can be described as convex, the entire object-side surface of the lens may not be convex, and the edge region of the object-side surface of the lens may be concave. Similarly, even if the image-side surface of a lens can be described as concave, the entire image-side surface of the lens may not be concave, and the edge region of the image-side surface of the lens may be convex.

[0103] An optical imaging system includes multiple lenses arranged along the optical axis. For example, an optical imaging system includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens arranged sequentially along the optical axis from the object side of the optical imaging system toward the imaging surface of the optical imaging system. The first lens is the lens closest to the object (or subject) to be imaged by the optical imaging system, while the seventh lens is the lens closest to the imaging surface of the optical imaging system.

[0104] Each lens in an optical imaging system comprises an optical portion and ribs. The optical portion of the lens is the part that refracts light and is typically formed in the central portion of the lens. The ribs of the lens are the edge portions that allow the lens to be mounted in a lens barrel and for the optical axis of the lens to be aligned with the optical axis of the optical imaging system. The ribs of the lens extend radially outward from the optical portion. The optical portions of the lenses typically do not contact each other. For example, the first through seventh lenses are mounted in a lens barrel such that they are spaced apart from each other by a predetermined distance along the optical axis of the optical imaging system. The ribs of the lenses may selectively contact each other. For example, the ribs of the first through fourth lenses, the first through fifth lenses, or the second through fourth lenses may contact each other so that the optical axes of these lenses can be easily aligned with the optical axis of the optical imaging system.

[0105] The configuration of the optical imaging system will be described next.

[0106] An optical imaging system includes multiple lenses. For example, an optical imaging system includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens arranged in numerical order from the object side of the optical imaging system toward the imaging surface of the optical imaging system.

[0107] The optical imaging system also includes an image sensor and a filter. The image sensor forms an imaging surface and converts light refracted by the first to seventh lenses into electrical signals. The filter is disposed between the lens and the imaging surface and blocks infrared light from the light refracted by the first to seventh lenses from entering the imaging surface.

[0108] The optical imaging system also includes aperture stops and spacers. An aperture stop may be positioned before the first lens, between two adjacent lenses (first to seventh lenses), or between the object-side and image-side surfaces of one of the lenses (first to seventh lenses) to adjust the amount of light incident on the imaging plane. Each spacer is positioned at a corresponding location between two lenses (first to seventh lenses), or between the seventh lens and a filter, to maintain a predetermined distance between the two lenses or between the seventh lens and the filter. Additionally, the spacers may be made of a light-shielding material to block external light from penetrating into the ribs of the lenses. There may be six or seven spacers. For example, a first spacer may be positioned between the first and second lenses, a second spacer between the second and third lenses, a third spacer between the third and fourth lenses, a fourth spacer between the fourth and fifth lenses, a fifth spacer between the fifth and sixth lenses, and a sixth spacer between the sixth and seventh lenses. Furthermore, the optical imaging system may also include a seventh spacer positioned between the sixth and seventh lenses.

[0109] Next, the lenses of the optical imaging system will be described.

[0110] The first lens has refractive power. For example, the first lens has positive or negative refractive power. One surface of the first lens may be convex. For example, the object-side surface of the first lens may be convex. One surface of the first lens may be concave. For example, the image-side surface of the first lens may be concave. The first lens may have an aspherical surface. For example, one or both surfaces of the first lens may be aspherical.

[0111] The second lens has refractive power. For example, the second lens has positive or negative refractive power. At least one surface of the second lens may be convex. For example, the object-side surface of the second lens may be convex, or both the object-side and image-side surfaces of the second lens may be convex. At least one surface of the second lens may be concave. For example, the image-side surface of the second lens may be concave, or both the object-side and image-side surfaces of the second lens may be concave. The second lens may have an aspherical surface. For example, one or both surfaces of the second lens may be aspherical.

[0112] The third lens has refractive power. For example, the third lens may have positive or negative refractive power. One surface of the third lens may be convex. For example, the object-side or image-side surface of the third lens may be convex. One surface of the third lens may be concave. For example, the object-side or image-side surface of the third lens may be concave. The third lens may have an aspherical surface. For example, one or both surfaces of the third lens may be aspherical.

[0113] The fourth lens has refractive power. For example, the fourth lens has positive or negative refractive power. At least one surface of the fourth lens may be convex. For example, the object-side surface or the image-side surface of the fourth lens may be convex, or both the object-side surface and the image-side surface of the fourth lens may be convex. One surface of the fourth lens may be concave. For example, the object-side surface or the image-side surface of the fourth lens may be concave. The fourth lens may have an aspherical surface. For example, one or both surfaces of the fourth lens may be aspherical.

[0114] The fifth lens has refractive power. For example, the fifth lens may have positive or negative refractive power. One surface of the fifth lens may be convex. For example, the object-side or image-side surface of the fifth lens may be convex. One surface of the fifth lens may be concave. For example, the object-side or image-side surface of the fifth lens may be concave. The fifth lens may have an aspherical surface. For example, one or both surfaces of the fifth lens may be aspherical.

[0115] The sixth lens has refractive power. For example, the sixth lens has positive or negative refractive power. At least one surface of the sixth lens may be convex. For example, the object-side surface or the image-side surface of the sixth lens may be convex, or both the object-side surface and the image-side surface of the sixth lens may be convex. At least one surface of the sixth lens may be concave. For example, the object-side surface or the image-side surface of the sixth lens may be concave, or both the object-side surface and the image-side surface of the sixth lens may be concave. At least one surface of the sixth lens may have at least one inflection point. An inflection point is the point where the lens surface changes from convex to concave or from concave to convex. The number of inflection points is counted from the center of the lens to the outer edge of the optical portion of the lens. For example, at least one inflection point may be formed on either or both of the object-side and image-side surfaces of the sixth lens. Therefore, at least one surface of the sixth lens may have paraxial regions and edge regions with different shapes from each other. For example, the paraxial region of the image-side surface of the sixth lens may be concave, but the edge region of the image-side surface of the sixth lens may be convex. The sixth lens may have an aspherical surface. For example, one or both surfaces of the sixth lens can be aspherical.

[0116] The seventh lens has refractive power. For example, the seventh lens has positive or negative refractive power. One surface of the seventh lens may be convex. For example, the object-side surface of the seventh lens may be convex. At least one surface of the seventh lens may be concave. For example, the image-side surface of the seventh lens may be concave, or both the object-side and image-side surfaces of the seventh lens may be concave. At least one surface of the seventh lens may have at least one inflection point. At least one inflection point may be formed on any one or both of the object-side and image-side surfaces of the seventh lens. Therefore, at least one surface of the seventh lens may have paraxial regions and edge regions with different shapes from each other. For example, the paraxial region of the image-side surface of the seventh lens may be concave, but the edge region of the image-side surface of the seventh lens may be convex. The seventh lens may have an aspherical surface. For example, one or both surfaces of the seventh lens may be aspherical.

[0117] Lenses in an optical imaging system can be made of optical materials with high light transmittance. For example, the first through seventh lenses can be made of plastic. However, the materials for the first through seventh lenses are not limited to plastic.

[0118] The aspherical surfaces of the first through seventh lenses are represented by Equation 1 below.

[0119] (1)

[0120] 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 conic constant; Y is the distance from a point on the aspherical surface of the lens in a direction perpendicular to the optical axis to the optical axis; A to H are aspherical constants; and Z (or 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 that intersects the vertex of the aspherical surface of the lens. Some examples disclosed in this application include the aspherical constant J. Additional Items JY 20 It can be added to Equation 1 to reflect the effect of the aspherical constant J.

[0121] An optical imaging system can satisfy one or more of the following conditional expressions 1 to 5.

[0122] 0.1 < L1w / L7w < 0.4 (Conditional expression 1)

[0123] 0.5 < S6d / f < 1.4 (Conditional expression 2)

[0124] 0.4 < L1TR / L7TR < 0.8 (Conditional expression 3)

[0125] 0.5 < L1234TRavg / L7TR < 0.9 (Conditional expression 4)

[0126] 0.5 < L12345TRavg / L7TR < 0.9 (Conditional expression 5)

[0127] In the above conditional expressions, L1w is the weight of the first lens in mg, and L7w is the weight of the seventh lens in mg.

[0128] S6d is the inner diameter of the sixth spacer in mm, and f is the total focal length of the optical imaging system in mm.

[0129] L1TR is the total outer diameter of the first lens, and L7TR is the total outer diameter of the seventh lens, expressed in mm. The total outer diameter of a lens is its diameter, including the optical portion and the ribs.

[0130] L1234TRavg is the average total outer diameter of the first to fourth lenses, expressed in mm, and L12345TRavg is the average total outer diameter of the first to fifth lenses, expressed in mm.

[0131] Conditional expressions 1 and 3 specify the range of the weight ratio and total outer diameter ratio between the first and seventh lenses to facilitate self-alignment between the lenses and alignment through the lens barrel.

[0132] The conditional expression 2 specifies the range of the ratio of the inner diameter of the sixth spacer ring to the total focal length of the optical imaging system to minimize the scintillation phenomenon.

[0133] The conditional expressions 4 and 5 specify the total outer diameter ratio between the lenses to facilitate aberration correction.

[0134] The optical imaging system may also satisfy one or more of the following conditional expressions 6 to 10: 0.1 < L1w / L7w < 0.3 (conditional expression 6) 0.5 < S6d / f < 1.2 (conditional expression 7) 0.4 < L1TR / L7TR < 0.7 (conditional expression 8) 0.5 < L1234TRavg / L7TR < 0.75 (conditional expression 9) 0.5 < L12345TRavg / L7TR < 0.76 (conditional expression 10) The conditional expressions 6 to 10 are the same as the conditional expressions 1 to 5, except that the conditional expressions 6 to 10 specify a narrower range.

[0135] The optical imaging system may also satisfy one or more of the following conditional expressions 11 to 31: 0.01 < R1 / R4 < 1.3 (conditional expression 11) 0.1 < R1 / R5 < 0.7 (conditional expression 12) 0.05 < R1 / R6 < 0.9 (conditional expression 13) 0.2 < R1 / R11 < 1.2 (conditional expression 14) 0.8 < R1 / R14 < 1.2 (conditional expression 15) 0.6 < (R11+R14) / (2 R1) < 3.0 (conditional expression 16) 0.4 < D13 / D57 < 1.2 (conditional expression 17) 0.1 < (1 / f1+1 / f2+1 / f3+1 / f4+1 / f5+1 / f6+1 / f7) f < 0.8 (conditional expression 18) 0.1 < (1 / f1+1 / f2+1 / f3+1 / f4+1 / f5+1 / f6+1 / f7) TTL < 1.0 (Conditional Expression 19) 0.2 < TD1 / D67 < 0.8 (Conditional expression 20) 0.1 < (R11+R14) / (R5+R6) < 1.0 (Conditional expression 21) SD12 < SD34 (conditional expression 22) SD56 < SD67 (Conditional expression 23) SD56 < SD34 (conditional expression 24) 0.6 < TTL / (2 (IMG HT)) < 0.9 (Conditional expression 25) 0.2 < ΣSD / ΣTD < 0.7 (Conditional expression 26) 0 < min(f1:f3) / max(f4:f7) < 0.4 (Conditional expression 27) 0.4 < (ΣTD) / TTL < 0.7 (Conditional expression 28) 0.7 < SL / TTL < 1.0 (Conditional expression 29) 0.81 < f12 / f123 < 0.96 (conditional expression 30) 0.6 < f12 / f1234 < 0.84 (Conditional expression 31) In the above conditional expressions, R1 is the radius of curvature of the object side of the first lens, R4 is the radius of curvature of the image side of the second lens, R5 is the radius of curvature of the object side of the third lens, R6 is the radius of curvature of the image side of the third lens, R11 is the radius of curvature of the object side of the sixth lens, and R14 is the radius of curvature of the image side of the seventh lens.

[0136] D13 is the distance along the optical axis of the optical imaging system from the object side of the first lens to the image side of the third lens, and D57 is the distance along the optical axis from the object side of the fifth lens to the image side of the seventh lens.

[0137] f1 is the focal length of the first lens, f2 is the focal length of the second lens, f3 is the focal length of the third lens, f4 is the focal length of the fourth lens, f5 is the focal length of the fifth lens, f6 is the focal length of the sixth lens, f7 is the focal length of the seventh lens, f is the total focal length of the optical imaging system, and TTL is the distance along the optical axis from the object side of the first lens to the imaging surface of the image sensor of the optical imaging system.

[0138] TD1 is the thickness of the first lens along the optical axis, and D67 is the distance along the optical axis from the object side of the sixth lens to the image side of the seventh lens.

[0139] SD12 is the distance along the optical axis from the image side of the first lens to the object side of the second lens; SD34 is the distance along the optical axis from the image side of the third lens to the object side of the fourth lens; SD56 is the distance along the optical axis from the image side of the fifth lens to the object side of the sixth lens; and SD67 is the distance along the optical axis from the image side of the sixth lens to the object side of the seventh lens.

[0140] IMG HT is half the diagonal length of the imaging surface of an image sensor.

[0141] ΣSD is the sum of the air gaps along the optical axis between each lens, and ΣTD is the sum of the thicknesses of each lens along the optical axis. The air gap is the distance along the optical axis between adjacent lenses.

[0142] min(f1:f3) is the minimum absolute value of the focal lengths of the first to third lenses, and max(f4:f7) is the maximum absolute value of the focal lengths of the fourth to seventh lenses.

[0143] SL is the distance along the optical axis from the aperture to the imaging surface of the image sensor.

[0144] f12 is the combined focal length of the first and second lenses, f123 is the combined focal length of the first to the third lenses, and f1234 is the combined focal length of the first to the fourth lenses.

[0145] Conditional expression 11 specifies the design range of the second lens to minimize the aberrations caused by the first lens. For example, it is difficult to expect sufficient correction of longitudinal spherical aberration for a second lens with a radius of curvature exceeding the upper limit of conditional expression 11, and it is difficult to expect sufficient correction of image scatter curvature for a second lens with a radius of curvature below the lower limit of conditional expression 11.

[0146] Conditional expressions 12 and 13 specify the design range of the third lens to minimize aberrations caused by the first lens. For example, it is difficult to expect adequate correction of longitudinal spherical aberration for a third lens with a radius of curvature exceeding the upper limit of conditional expression 12 or 13, and it is difficult to expect adequate correction of image scatter curvature for a third lens with a radius of curvature below the lower limit of conditional expression 12 or 13.

[0147] Conditional expression 14 specifies the design range of the sixth lens to minimize the aberrations caused by the first lens. For example, it is difficult to expect adequate correction of longitudinal spherical aberration for a sixth lens with a radius of curvature exceeding the upper limit of conditional expression 14, while a sixth lens with a radius of curvature below the lower limit of conditional expression 14 is prone to flickering.

[0148] Conditional expression 15 specifies the design range of the seventh lens to minimize the aberrations caused by the first lens. For example, it is difficult to expect adequate correction of longitudinal spherical aberration for a seventh lens with a radius of curvature exceeding the upper limit of conditional expression 15, while a seventh lens with a radius of curvature below the lower limit of conditional expression 15 is prone to causing the imaging surface to bend.

[0149] Conditional expression 16 specifies the ratio of the sum of the radii of curvature of the sixth and seventh lenses to twice the radius of curvature of the first lens, in order to correct longitudinal spherical aberration and achieve excellent optical performance.

[0150] Conditional expression 17 specifies the proportion of the optical imaging system that can be installed in a compact terminal. For example, an optical imaging system with a proportion exceeding the upper limit of conditional expression 17 can lead to a problem of increased overall length of the optical imaging system, while an optical imaging system with a proportion below the lower limit of conditional expression 17 can lead to a problem of increased cross-sectional area of ​​the optical imaging system.

[0151] Conditional expressions 18 and 19 specify the refractive power ratios of the first through seventh lenses to facilitate the mass production of optical imaging systems. For example, optical imaging systems with refractive power ratios exceeding the upper limit or falling below the lower limit of conditional expressions 18 or 19 are difficult to commercialize because the refractive power of one or more of the first through seventh lenses is too high.

[0152] Conditional expression 20 specifies the thickness range of the first lens to achieve a compact optical imaging system. For example, a first lens with a thickness exceeding the upper limit or falling below the lower limit of conditional expression 20 is too thick or too thin to be manufactured.

[0153] Conditional expression 22 specifies the design conditions for the first to fourth lenses to improve chromatic aberration. For example, a shorter distance between the first and second lenses than between the third and fourth lenses is beneficial for improving chromatic aberration.

[0154] Conditional expressions 25 through 28 specify the design conditions for achieving a compact optical imaging system. For example, lenses that deviate from the numerical range of conditional expressions 26 or 28 are difficult to form by injection molding and machining.

[0155] Conditional expressions 29 to 31 specify the design conditions for an optical imaging system taking into account the position of the aperture stop. For example, an optical imaging system that does not satisfy one or more of the conditional expressions 29 to 31 may have a longer total length due to the refractive power of the lens positioned behind the aperture stop.

[0156] Next, several examples of optical imaging systems will be described. In the tables described below, S0 represents the distance from the aperture or object to the object side of the first lens, S1 represents the object side of the first lens, S2 represents the image side of the first lens, S3 represents the object side of the second lens, S4 represents the image side of the second lens, S5 represents the object side of the third lens, S6 represents the image side of the third lens, S7 represents the object side of the fourth lens, S8 represents the image side of the fourth lens, S9 represents the object side of the fifth lens, S10 represents the image side of the fifth lens, S11 represents the object side of the sixth lens, S12 represents the image side of the sixth lens, S13 represents the object side of the seventh lens, S14 represents the image side of the seventh lens, S15 represents the object side of the filter, S16 represents the image side of the filter, and S17 represents the imaging plane.

[0157] First Example

[0158] Figure 1 This is a view showing a first example of an optical imaging system, and Figure 2 It shows Figure 1 Aberration curves of optical imaging systems.

[0159] The optical imaging system 1 includes a first lens 1001, a second lens 2001, a third lens 3001, a fourth lens 4001, a fifth lens 5001, a sixth lens 6001, and a seventh lens 7001.

[0160] The first lens 1001 has positive refractive power, a convex object-side surface, and a concave image-side surface. The second lens 2001 has negative refractive power, a convex object-side surface, and a concave image-side surface. The third lens 3001 has positive refractive power, a convex object-side surface, and a concave image-side surface. The fourth lens 4001 has negative refractive power, a convex object-side surface, and a concave image-side surface. The fifth lens 5001 has negative refractive power, a convex object-side surface, and a concave image-side surface. The sixth lens 6001 has positive refractive power, a convex object-side surface, and a convex image-side surface. Furthermore, at least one inflection point is formed on any one or both surfaces of the object-side and image-side surfaces of the sixth lens 6001. The seventh lens 7001 has negative refractive power, a concave object-side surface, and a concave image-side surface. Furthermore, one inflection point is formed on each surface of the object-side and image-side surfaces of the seventh lens 7001.

[0161] The optical imaging system 1 also includes an aperture stop, a filter 8001, and an image sensor 9001. The aperture stop is positioned between the first lens 1001 and the second lens 2001 to adjust the amount of light incident on the image sensor 9001. The filter 8001 is positioned between the seventh lens 7001 and the image sensor 9001 to block infrared light. The image sensor 9001 forms an imaging surface on which the image of the object is formed. Although Figure 1 The aperture is not shown, but it is positioned at a distance of 0.818 mm from the object side of the first lens 1001 in the direction toward the imaging surface of the optical imaging system 1. This distance is equal to TTL-SL and can be calculated from the TTL and SL values ​​of Example 1 listed in Table 59, which will be presented later in this application.

[0162] Table 1 below shows Figure 1 The physical properties of the lenses and other components of the optical imaging system are shown in Table 2 below. Figure 1 The aspherical coefficient of the lens.

[0163] Table 1

[0164] Table 2

[0165] Second example

[0166] Figure 3 This is a view showing a second example of an optical imaging system, and Figure 4 It shows Figure 3 Aberration curves of optical imaging systems.

[0167] The optical imaging system 2 includes a first lens 1002, a second lens 2002, a third lens 3002, a fourth lens 4002, a fifth lens 5002, a sixth lens 6002, and a seventh lens 7002.

[0168] The first lens 1002 has positive refractive power, a convex object-side surface, and a concave image-side surface. The second lens 2002 has negative refractive power, a convex object-side surface, and a concave image-side surface. The third lens 3002 has positive refractive power, a convex object-side surface, and a concave image-side surface. The fourth lens 4002 has negative refractive power, a convex object-side surface, and a concave image-side surface. The fifth lens 5002 has negative refractive power, a convex object-side surface, and a concave image-side surface. The sixth lens 6002 has positive refractive power, a convex object-side surface, and a convex image-side surface. Furthermore, at least one inflection point is formed on any one or both of the object-side and image-side surfaces of the sixth lens 6002. The seventh lens 7002 has negative refractive power, a concave object-side surface, and a concave image-side surface. Furthermore, one inflection point is formed on each of the object-side and image-side surfaces of the seventh lens 7002.

[0169] The optical imaging system 2 also includes an aperture stop, a filter 8002, and an image sensor 9002. The aperture stop is positioned between the first lens 1002 and the second lens 2002 to adjust the amount of light incident on the image sensor 9002. The filter 8002 is positioned between the seventh lens 7002 and the image sensor 9002 to block infrared light. The image sensor 9002 forms an imaging surface on which the image of the object is formed. Although Figure 3 The aperture is not shown, but it is positioned at a distance of 0.819 mm from the object side of the first lens 1002 in the direction toward the imaging surface of the optical imaging system 2. This distance is equal to TTL-SL and can be calculated from the TTL and SL values ​​of Example 2 listed in Table 59, which will be presented later in this application.

[0170] Table 3 below shows Figure 3 The physical properties of the lenses and other components of the optical imaging system are shown in Table 4 below. Figure 3 The aspherical coefficient of the lens.

[0171] Table 3

[0172] Table 4

[0173] Third Example

[0174] Figure 5 This is a view showing a third example of an optical imaging system, and Figure 6 It shows Figure 5 Aberration curves of optical imaging systems.

[0175] The optical imaging system 3 includes a first lens 1003, a second lens 2003, a third lens 3003, a fourth lens 4003, a fifth lens 5003, a sixth lens 6003, and a seventh lens 7003.

[0176] The first lens 1003 has positive refractive power, a convex object-side surface, and a concave image-side surface. The second lens 2003 has positive refractive power, a convex object-side surface, and a convex image-side surface. The third lens 3003 has negative refractive power, a convex object-side surface, and a concave image-side surface. The fourth lens 4003 has positive refractive power, a concave object-side surface, and a convex image-side surface. The fifth lens 5003 has positive refractive power, a convex object-side surface, and a concave image-side surface. The sixth lens 6003 has negative refractive power, a convex object-side surface, and a concave image-side surface. Furthermore, at least one inflection point is formed on any one or both surfaces of the object-side and image-side surfaces of the sixth lens 6003. The seventh lens 7003 has positive refractive power, a convex object-side surface, and a concave image-side surface. Furthermore, two inflection points are formed on the object-side surface of the seventh lens 7003, and one inflection point is formed on the image-side surface of the seventh lens 7003.

[0177] The optical imaging system 3 also includes an aperture stop, a filter 8003, and an image sensor 9003. The aperture stop is positioned between the second lens 2003 and the third lens 3003 to adjust the amount of light incident on the image sensor 9003. The filter 8003 is positioned between the seventh lens 7003 and the image sensor 9003 to block infrared light. The image sensor 9003 forms an imaging surface on which the image of the object is formed. Although Figure 5 The aperture is not shown, but it is positioned at a distance of 1.269 mm from the object side of the first lens 1003 in the direction toward the imaging surface of the optical imaging system 3. This distance is equal to TTL-SL and can be calculated from the TTL and SL values ​​of Example 3 listed in Table 59, which will be presented later in this application.

[0178] Table 5 below shows Figure 5 The physical properties of the lenses and other components of the optical imaging system are shown in Table 6 below. Figure 5 The aspherical coefficient of the lens.

[0179] Table 5

[0180] Table 6

[0181] Fourth example

[0182] Figure 7 This is a view showing a fourth example of an optical imaging system, and Figure 8 It shows Figure 7 Aberration curves of optical imaging systems.

[0183] The optical imaging system 4 includes a first lens 1004, a second lens 2004, a third lens 3004, a fourth lens 4004, a fifth lens 5004, a sixth lens 6004, and a seventh lens 7004.

[0184] The first lens 1004 has positive refractive power, a convex object-side surface, and a concave image-side surface. The second lens 2004 has positive refractive power, a convex object-side surface, and a convex image-side surface. The third lens 3004 has negative refractive power, a convex object-side surface, and a concave image-side surface. The fourth lens 4004 has negative refractive power, a concave object-side surface, and a convex image-side surface. The fifth lens 5004 has positive refractive power, a convex object-side surface, and a concave image-side surface. The sixth lens 6004 has negative refractive power, a convex object-side surface, and a concave image-side surface. Furthermore, at least one inflection point is formed on any one or both surfaces of the object-side and image-side surfaces of the sixth lens 6004. The seventh lens 7004 has positive refractive power, a convex object-side surface, and a concave image-side surface. Furthermore, two inflection points are formed on the object-side surface of the seventh lens 7004, and one inflection point is formed on the image-side surface of the seventh lens 7004.

[0185] The optical imaging system 4 also includes an aperture stop, a filter 8004, and an image sensor 9004. The aperture stop is positioned between the second lens 2004 and the third lens 3004 to adjust the amount of light incident on the image sensor 9004. The filter 8004 is positioned between the seventh lens 7004 and the image sensor 9004 to block infrared light. The image sensor 9004 forms an imaging surface on which the image of the object is formed. Although Figure 7 The aperture is not shown, but it is positioned at a distance of 1.259 mm from the object side of the first lens 1004 in the direction toward the imaging surface of the optical imaging system 4. This distance is equal to TTL-SL and can be calculated from the TTL and SL values ​​of Example 4 listed in Table 59, which will be presented later in this application.

[0186] Table 7 below shows Figure 7 The physical properties of the lenses and other components of the optical imaging system are shown in Table 8 below. Figure 7 The aspherical coefficient of the lens.

[0187] Table 7

[0188] Table 8

[0189] Fifth example

[0190] Figure 9 This is a view showing the fifth example of an optical imaging system, and Figure 10 It shows Figure 9 Aberration curves of optical imaging systems.

[0191] The optical imaging system 5 includes a first lens 1005, a second lens 2005, a third lens 3005, a fourth lens 4005, a fifth lens 5005, a sixth lens 6005, and a seventh lens 7005.

[0192] The first lens 1005 has positive refractive power, a convex object-side surface, and a concave image-side surface. The second lens 2005 has positive refractive power, a convex object-side surface, and a convex image-side surface. The third lens 3005 has negative refractive power, a convex object-side surface, and a concave image-side surface. The fourth lens 4005 has negative refractive power, a concave object-side surface, and a convex image-side surface. The fifth lens 5005 has positive refractive power, a convex object-side surface, and a concave image-side surface. The sixth lens 6005 has negative refractive power, a convex object-side surface, and a concave image-side surface. Furthermore, at least one inflection point is formed on any one or both surfaces of the object-side and image-side surfaces of the sixth lens 6005. The seventh lens 7005 has positive refractive power, a convex object-side surface, and a concave image-side surface. Furthermore, two inflection points are formed on the object-side surface of the seventh lens 7005, and one inflection point is formed on the image-side surface of the seventh lens 7005.

[0193] The optical imaging system 5 also includes an aperture stop, a filter 8005, and an image sensor 9005. The aperture stop is positioned between the second lens 2005 and the third lens 3005 to adjust the amount of light incident on the image sensor 9005. The filter 8005 is positioned between the seventh lens 7005 and the image sensor 9005 to block infrared light. The image sensor 9005 forms an imaging surface on which the image of the object is formed. Although Figure 9 The aperture is not shown, but it is positioned at a distance of 1.169 mm from the object side of the first lens 1005 in the direction toward the imaging surface of the optical imaging system 5. This distance is equal to TTL-SL and can be calculated from the TTL and SL values ​​of Example 5 listed in Table 59, which will be presented later in this application.

[0194] Table 9 below shows Figure 9 The physical properties of the lenses and other components of the optical imaging system are shown in Table 10 below. Figure 9 The aspherical coefficient of the lens.

[0195] Table 9

[0196] Table 10

[0197] Sixth example

[0198] Figure 11 This is a view showing the sixth example of an optical imaging system, and Figure 12 It shows Figure 11 Aberration curves of optical imaging systems.

[0199] The optical imaging system 6 includes a first lens 1006, a second lens 2006, a third lens 3006, a fourth lens 4006, a fifth lens 5006, a sixth lens 6006, and a seventh lens 7006.

[0200] The first lens 1006 has negative refractive power, a convex object-side surface, and a concave image-side surface. The second lens 2006 has positive refractive power, a convex object-side surface, and a concave image-side surface. The third lens 3006 has negative refractive power, a convex object-side surface, and a concave image-side surface. The fourth lens 4006 has negative refractive power, a convex object-side surface, and a concave image-side surface. The fifth lens 5006 has positive refractive power, a convex object-side surface, and a concave image-side surface. The sixth lens 6006 has positive refractive power, a convex object-side surface, and a convex image-side surface. Furthermore, at least one inflection point is formed on any one or both of the object-side and image-side surfaces of the sixth lens 6006. The seventh lens 7006 has negative refractive power, a concave object-side surface, and a concave image-side surface. Furthermore, one inflection point is formed on each of the object-side and image-side surfaces of the seventh lens 7006.

[0201] The optical imaging system 6 also includes an aperture stop, a filter 8006, and an image sensor 9006. The aperture stop is positioned between the first lens 1006 and the second lens 2006 to adjust the amount of light incident on the image sensor 9006. The filter 8006 is positioned between the seventh lens 7006 and the image sensor 9006 to block infrared light. The image sensor 9006 forms an imaging surface on which the image of the object is formed. Although Figure 11 The aperture is not shown, but it is positioned at a distance of 0.383 mm from the object side of the first lens 1006 in the direction toward the imaging surface of the optical imaging system 6. This distance is equal to TTL-SL and can be calculated from the TTL and SL values ​​of Example 6 listed in Table 59, which will be presented later in this application.

[0202] Table 11 below shows Figure 11 The physical properties of the lenses and other components of the optical imaging system are shown in Table 12 below. Figure 11 The aspherical coefficient of the lens.

[0203] Table 11

[0204] Table 12

[0205] Seventh Example

[0206] Figure 13 This is a view showing the seventh example of an optical imaging system, and Figure 14 It shows Figure 13 Aberration curves of optical imaging systems.

[0207] The optical imaging system 7 includes a first lens 1007, a second lens 2007, a third lens 3007, a fourth lens 4007, a fifth lens 5007, a sixth lens 6007, and a seventh lens 7007.

[0208] The first lens 1007 has negative refractive power, a convex object-side surface, and a concave image-side surface. The second lens 2007 has positive refractive power, a convex object-side surface, and a concave image-side surface. The third lens 3007 has negative refractive power, a convex object-side surface, and a concave image-side surface. The fourth lens 4007 has negative refractive power, a convex object-side surface, and a concave image-side surface. The fifth lens 5007 has positive refractive power, a convex object-side surface, and a concave image-side surface. The sixth lens 6007 has positive refractive power, a convex object-side surface, and a convex image-side surface. Furthermore, at least one inflection point is formed on any one or both of the object-side and image-side surfaces of the sixth lens 6007. The seventh lens 7007 has negative refractive power, a concave object-side surface, and a concave image-side surface. Furthermore, one inflection point is formed on each of the object-side and image-side surfaces of the seventh lens 7007.

[0209] The optical imaging system 7 also includes an aperture stop, a filter 8007, and an image sensor 9007. The aperture stop is positioned between the first lens 1007 and the second lens 2007 to adjust the amount of light incident on the image sensor 9007. The filter 8007 is positioned between the seventh lens 7007 and the image sensor 9007 to block infrared light. The image sensor 9007 forms an imaging surface on which the image of the object is formed. Although Figure 13 The aperture is not shown, but it is positioned at a distance of 0.406 mm from the object side of the first lens 1007 in the direction toward the imaging surface of the optical imaging system 7. This distance is equal to TTL-SL and can be calculated from the TTL and SL values ​​of Example 7 listed in Table 59, which will be presented later in this application.

[0210] Table 13 below shows Figure 13 The physical properties of the lenses and other components of the optical imaging system are shown in Table 14 below. Figure 13 The aspherical coefficient of the lens.

[0211] Table 13

[0212] Table 14

[0213] Eighth Example

[0214] Figure 15 This is a view showing the eighth example of an optical imaging system, and Figure 16 It shows Figure 15 Aberration curves of optical imaging systems.

[0215] The optical imaging system 8 includes a first lens 1008, a second lens 2008, a third lens 3008, a fourth lens 4008, a fifth lens 5008, a sixth lens 6008, and a seventh lens 7008.

[0216] The first lens 1008 has negative refractive power, a convex object-side surface, and a concave image-side surface. The second lens 2008 has positive refractive power, a convex object-side surface, and a concave image-side surface. The third lens 3008 has negative refractive power, a convex object-side surface, and a concave image-side surface. The fourth lens 4008 has negative refractive power, a convex object-side surface, and a concave image-side surface. The fifth lens 5008 has positive refractive power, a convex object-side surface, and a concave image-side surface. The sixth lens 6008 has positive refractive power, a convex object-side surface, and a convex image-side surface. Furthermore, at least one inflection point is formed on any one or both of the object-side and image-side surfaces of the sixth lens 6008. The seventh lens 7008 has negative refractive power, a concave object-side surface, and a concave image-side surface. Furthermore, one inflection point is formed on each of the object-side and image-side surfaces of the seventh lens 7008.

[0217] The optical imaging system 8 also includes an aperture stop, a filter 8008, and an image sensor 9008. The aperture stop is positioned between the first lens 1008 and the second lens 2008 to adjust the amount of light incident on the image sensor 9008. The filter 8008 is positioned between the seventh lens 7008 and the image sensor 9008 to block infrared light. The image sensor 9008 forms an imaging surface on which the image of the object is formed. Although Figure 15 The aperture is not shown, but it is positioned at a distance of 0.335 mm from the object side of the first lens 1008 in the direction toward the imaging surface of the optical imaging system 8. This distance is equal to TTL-SL and can be calculated from the TTL and SL values ​​of Example 8 listed in Table 59, which will be presented later in this application.

[0218] Table 15 below shows Figure 15 The physical properties of the lenses and other components of the optical imaging system are shown in Table 16 below. Figure 15The aspherical coefficient of the lens.

[0219] Table 15

[0220] Table 16

[0221] Ninth Example

[0222] Figure 17 This is a view showing the ninth example of an optical imaging system, and Figure 18 It shows Figure 17 Aberration curves of optical imaging systems.

[0223] The optical imaging system 9 includes a first lens 1009, a second lens 2009, a third lens 3009, a fourth lens 4009, a fifth lens 5009, a sixth lens 6009, and a seventh lens 7009.

[0224] The first lens 1009 has positive refractive power, a convex object-side surface, and a concave image-side surface. The second lens 2009 has negative refractive power, a convex object-side surface, and a concave image-side surface. The third lens 3009 has negative refractive power, a convex object-side surface, and a concave image-side surface. The fourth lens 4009 has positive refractive power, a convex object-side surface, and a concave image-side surface. The fifth lens 5009 has negative refractive power, a concave object-side surface, and a convex image-side surface. The sixth lens 6009 has positive refractive power, a convex object-side surface, and a convex image-side surface. Furthermore, at least one inflection point is formed on any one or both of the object-side and image-side surfaces of the sixth lens 6009. The seventh lens 7009 has negative refractive power, a concave object-side surface, and a concave image-side surface. Furthermore, one inflection point is formed on each of the object-side and image-side surfaces of the seventh lens 7009.

[0225] The optical imaging system 9 also includes an aperture stop, a filter 8009, and an image sensor 9009. The aperture stop is positioned between the first lens 1009 and the second lens 2009 to adjust the amount of light incident on the image sensor 9009. The filter 8009 is positioned between the seventh lens 7009 and the image sensor 9009 to block infrared light. The image sensor 9009 forms an imaging surface on which the image of the object is formed. Although Figure 17 The aperture is not shown, but it is positioned at a distance of 0.731 mm from the object side of the first lens 1009 in the direction toward the imaging surface of the optical imaging system 9. This distance is equal to TTL-SL and can be calculated from the TTL and SL values ​​of Example 9 listed in Table 59, which will be presented later in this application.

[0226] Table 17 below shows Figure 17The physical properties of the lenses and other components of the optical imaging system are shown in Table 18 below. Figure 17 The aspherical coefficient of the lens.

[0227] Table 17

[0228] Table 18

[0229] Tenth example

[0230] Figure 19 This is a view showing the tenth example of an optical imaging system, and Figure 20 It shows Figure 19 Aberration curves of optical imaging systems.

[0231] The optical imaging system 10 includes a first lens 1010, a second lens 2010, a third lens 3010, a fourth lens 4010, a fifth lens 5010, a sixth lens 6010, and a seventh lens 7010.

[0232] The first lens 1010 has positive refractive power, a convex object-side surface, and a concave image-side surface. The second lens 2010 has negative refractive power, a convex object-side surface, and a concave image-side surface. The third lens 3010 has negative refractive power, a convex object-side surface, and a concave image-side surface. The fourth lens 4010 has positive refractive power, a convex object-side surface, and a concave image-side surface. The fifth lens 5010 has negative refractive power, a concave object-side surface, and a convex image-side surface. The sixth lens 6010 has positive refractive power, a convex object-side surface, and a convex image-side surface. Furthermore, at least one inflection point is formed on any one or both of the object-side and image-side surfaces of the sixth lens 6010. The seventh lens 7010 has negative refractive power, a concave object-side surface, and a concave image-side surface. Furthermore, one inflection point is formed on each of the object-side and image-side surfaces of the seventh lens 7010.

[0233] The optical imaging system 10 also includes an aperture stop, a filter 8010, and an image sensor 9010. The aperture stop is positioned between the first lens 1010 and the second lens 2010 to adjust the amount of light incident on the image sensor 9010. The filter 8010 is positioned between the seventh lens 7010 and the image sensor 9010 to block infrared light. The image sensor 9010 forms an imaging surface on which the image of the object is formed. Although Figure 19 The aperture is not shown, but it is positioned at a distance of 0.737 mm from the object side of the first lens 1010 in the direction toward the imaging surface of the optical imaging system 10. This distance is equal to TTL-SL and can be calculated from the TTL and SL values ​​of Example 10 listed in Table 59, which will be presented later in this application.

[0234] Table 19 below shows Figure 19 The physical properties of the lenses and other components of the optical imaging system are shown in Table 20 below. Figure 19 The aspherical coefficient of the lens.

[0235] Table 19

[0236] Table 20

[0237] Eleventh Example

[0238] Figure 21 This is a view showing an eleventh example of an optical imaging system, and Figure 22 It shows Figure 21 Aberration curves of optical imaging systems.

[0239] The optical imaging system 11 includes a first lens 1011, a second lens 2011, a third lens 3011, a fourth lens 4011, a fifth lens 5011, a sixth lens 6011, and a seventh lens 7011.

[0240] The first lens 1011 has positive refractive power, a convex object-side surface, and a concave image-side surface. The second lens 2011 has negative refractive power, a convex object-side surface, and a concave image-side surface. The third lens 3011 has negative refractive power, a convex object-side surface, and a concave image-side surface. The fourth lens 4011 has positive refractive power, a convex object-side surface, and a concave image-side surface. The fifth lens 5011 has negative refractive power, a concave object-side surface, and a convex image-side surface. The sixth lens 6011 has positive refractive power, a convex object-side surface, and a convex image-side surface. Furthermore, at least one inflection point is formed on any one or both surfaces of the object-side and image-side surfaces of the sixth lens 6011. The seventh lens 7011 has negative refractive power, a concave object-side surface, and a concave image-side surface. Furthermore, one inflection point is formed on each surface of the object-side and image-side surfaces of the seventh lens 7011.

[0241] The optical imaging system 11 also includes an aperture stop, a filter 8011, and an image sensor 9011. The aperture stop is positioned between the first lens 1011 and the second lens 2011 to adjust the amount of light incident on the image sensor 9011. The filter 8011 is positioned between the seventh lens 7011 and the image sensor 9011 to block infrared light. The image sensor 9011 forms an imaging surface on which the image of the object is formed. Although Figure 21The aperture is not shown, but it is positioned at a distance of 0.698 mm from the object side of the first lens 1011 in the direction toward the imaging surface of the optical imaging system 11. This distance is equal to TTL-SL and can be calculated from the TTL and SL values ​​of Example 11 listed in Table 59, which will be presented later in this application.

[0242] Table 21 below shows Figure 21 The physical properties of the lenses and other components of the optical imaging system are shown in Table 22 below. Figure 21 The aspherical coefficient of the lens.

[0243] Table 21

[0244] Table 22

[0245] Twelfth Example

[0246] Figure 23 This is a view showing the twelfth example of an optical imaging system, and Figure 24 It shows Figure 23 Aberration curves of optical imaging systems.

[0247] The optical imaging system 12 includes a first lens 1012, a second lens 2012, a third lens 3012, a fourth lens 4012, a fifth lens 5012, a sixth lens 6012, and a seventh lens 7012.

[0248] The first lens 1012 has positive refractive power, a convex object-side surface, and a concave image-side surface. The second lens 2012 has positive refractive power, a convex object-side surface, and a convex image-side surface. The third lens 3012 has negative refractive power, a convex object-side surface, and a concave image-side surface. The fourth lens 4012 has negative refractive power, a convex object-side surface, and a concave image-side surface. The fifth lens 5012 has positive refractive power, a convex object-side surface, and a concave image-side surface. The sixth lens 6012 has negative refractive power, a convex object-side surface, and a concave image-side surface. Furthermore, at least one inflection point is formed on any one or both surfaces of the object-side and image-side surfaces of the sixth lens 6012. The seventh lens 7012 has negative refractive power, a convex object-side surface, and a concave image-side surface. Furthermore, two inflection points are formed on the object-side surface of the seventh lens 7012, and one inflection point is formed on the image-side surface of the seventh lens 7012.

[0249] The optical imaging system 12 also includes an aperture stop, a filter 8012, and an image sensor 9012. The aperture stop is positioned between the second lens 2012 and the third lens 3012 to adjust the amount of light incident on the image sensor 9012. The filter 8012 is positioned between the seventh lens 7012 and the image sensor 9012 to block infrared light. The image sensor 9012 forms an imaging surface on which the image of the object is formed. Although Figure 23 The aperture is not shown, but it is positioned at a distance of 1.158 mm from the object side of the first lens 1012 in the direction toward the imaging surface of the optical imaging system 12. This distance is equal to TTL-SL and can be calculated from the TTL and SL values ​​of Example 12 listed in Table 59, which will be presented later in this application.

[0250] Table 23 below shows Figure 23 The physical properties of the lenses and other components of the optical imaging system are shown in Table 24 below. Figure 23 The aspherical coefficient of the lens.

[0251] Table 23

[0252] Table 24

[0253] Thirteenth Example

[0254] Figure 25 This is a view illustrating a thirteenth example of an optical imaging system, and Figure 26 It shows Figure 25 Aberration curves of optical imaging systems.

[0255] The optical imaging system 13 includes a first lens 1013, a second lens 2013, a third lens 3013, a fourth lens 4013, a fifth lens 5013, a sixth lens 6013, and a seventh lens 7013.

[0256] The first lens 1013 has positive refractive power, a convex object-side surface, and a concave image-side surface. The second lens 2013 has positive refractive power, a convex object-side surface, and a concave image-side surface. The third lens 3013 has negative refractive power, a convex object-side surface, and a concave image-side surface. The fourth lens 4013 has positive refractive power, a convex object-side surface, and a concave image-side surface. The fifth lens 5013 has negative refractive power, a convex object-side surface, and a concave image-side surface. The sixth lens 6013 has positive refractive power, a convex object-side surface, and a concave image-side surface. Furthermore, at least one inflection point is formed on any one or both surfaces of the object-side and image-side surfaces of the sixth lens 6013. The seventh lens 7013 has negative refractive power, a convex object-side surface, and a concave image-side surface. Furthermore, two inflection points are formed on the object-side surface of the seventh lens 7013, and one inflection point is formed on the image-side surface of the seventh lens 7013.

[0257] The optical imaging system 13 also includes an aperture stop, a filter 8013, and an image sensor 9013. The aperture stop is positioned between the second lens 2013 and the third lens 3013 to adjust the amount of light incident on the image sensor 9013. The filter 8013 is positioned between the seventh lens 7013 and the image sensor 9013 to block infrared light. The image sensor 9013 forms an imaging surface on which the image of the object is formed. Although Figure 25 The aperture is not shown, but it is positioned at a distance of 1.077 mm from the object side of the first lens 1013 in the direction toward the imaging surface of the optical imaging system 13. This distance is equal to TTL-SL and can be calculated from the TTL and SL values ​​of Example 13 listed in Table 59, which will be presented later in this application.

[0258] Table 25 below shows Figure 25 The physical properties of the lenses and other components of the optical imaging system are shown in Table 26 below. Figure 25 The aspherical coefficient of the lens.

[0259] Table 25

[0260] Table 26

[0261] Fourteenth Example

[0262] Figure 27 This is a view showing the fourteenth example of an optical imaging system, and Figure 28 It shows Figure 27 Aberration curves of optical imaging systems.

[0263] The optical imaging system 14 includes a first lens 1014, a second lens 2014, a third lens 3014, a fourth lens 4014, a fifth lens 5014, a sixth lens 6014, and a seventh lens 7014.

[0264] The first lens 1014 has positive refractive power, a convex object-side surface, and a concave image-side surface. The second lens 2014 has positive refractive power, a convex object-side surface, and a concave image-side surface. The third lens 3014 has negative refractive power, a convex object-side surface, and a concave image-side surface. The fourth lens 4014 has positive refractive power, a convex object-side surface, and a concave image-side surface. The fifth lens 5014 has positive refractive power, a convex object-side surface, and a concave image-side surface. The sixth lens 6014 has negative refractive power, a convex object-side surface, and a concave image-side surface. Furthermore, at least one inflection point is formed on any one or both surfaces of the object-side and image-side surfaces of the sixth lens 6014. The seventh lens 7014 has negative refractive power, a convex object-side surface, and a concave image-side surface. Furthermore, two inflection points are formed on the object-side surface of the seventh lens 7014, and one inflection point is formed on the image-side surface of the seventh lens 7014.

[0265] The optical imaging system 14 also includes an aperture stop, a filter 8014, and an image sensor 9014. The aperture stop is positioned between the second lens 2014 and the third lens 3014 to adjust the amount of light incident on the image sensor 9014. The filter 8014 is positioned between the seventh lens 7014 and the image sensor 9014 to block infrared light. The image sensor 9014 forms an imaging surface on which the image of the object is formed. Although Figure 27 The aperture is not shown, but it is positioned at a distance of 1.230 mm from the object side of the first lens 1014 in the direction toward the imaging surface of the optical imaging system 14. This distance is equal to TTL-SL and can be calculated from the TTL and SL values ​​of Example 14 listed in Table 59, which will be presented later in this application.

[0266] Table 27 below shows Figure 27 The physical properties of the lenses and other components of the optical imaging system are shown in Table 28 below. Figure 27 The aspherical coefficient of the lens.

[0267] Table 27

[0268] Table 28

[0269] Example 15

[0270] Figure 29 This is a view showing the fifteenth example of an optical imaging system, and Figure 30 It shows Figure 29 Aberration curves of optical imaging systems.

[0271] The optical imaging system 15 includes a first lens 1015, a second lens 2015, a third lens 3015, a fourth lens 4015, a fifth lens 5015, a sixth lens 6015, and a seventh lens 7015.

[0272] The first lens 1015 has positive refractive power, a convex object-side surface, and a concave image-side surface. The second lens 2015 has positive refractive power, a convex object-side surface, and a concave image-side surface. The third lens 3015 has negative refractive power, a convex object-side surface, and a concave image-side surface. The fourth lens 4015 has positive refractive power, a convex object-side surface, and a concave image-side surface. The fifth lens 5015 has positive refractive power, a convex object-side surface, and a concave image-side surface. The sixth lens 6015 has negative refractive power, a convex object-side surface, and a concave image-side surface. Furthermore, at least one inflection point is formed on any one or both surfaces of the object-side and image-side surfaces of the sixth lens 6015. The seventh lens 7015 has negative refractive power, a convex object-side surface, and a concave image-side surface. Furthermore, two inflection points are formed on the object-side surface of the seventh lens 7015, and one inflection point is formed on the image-side surface of the seventh lens 7015.

[0273] The optical imaging system 15 also includes an aperture stop, a filter 8015, and an image sensor 9015. The aperture stop is positioned between the second lens 2015 and the third lens 3015 to adjust the amount of light incident on the image sensor 9015. The filter 8015 is positioned between the seventh lens 7015 and the image sensor 9015 to block infrared light. The image sensor 9015 forms an imaging surface on which the image of the object is formed. Although Figure 29 The aperture is not shown, but it is positioned at a distance of 1.272 mm from the object side of the first lens 1015 in the direction toward the imaging surface of the optical imaging system 15. This distance is equal to the TTL-SL and can be calculated from the TTL and SL values ​​of Example 15 listed in Table 59, which will be presented later in this application.

[0274] Table 29 below shows Figure 29 The physical properties of the lenses and other components of the optical imaging system are shown in Table 30 below. Figure 29 The aspherical coefficient of the lens.

[0275] Table 29

[0276] Table 30

[0277] Sixteenth Example

[0278] Figure 31 This is a view showing the sixteenth example of an optical imaging system, and Figure 32 It shows Figure 31 Aberration curves of optical imaging systems.

[0279] The optical imaging system 16 includes a first lens 1016, a second lens 2016, a third lens 3016, a fourth lens 4016, a fifth lens 5016, a sixth lens 6016, and a seventh lens 7016.

[0280] The first lens 1016 has positive refractive power, a convex object-side surface, and a concave image-side surface. The second lens 2016 has negative refractive power, a concave object-side surface, and a concave image-side surface. The third lens 3016 has positive refractive power, a convex object-side surface, and a concave image-side surface. The fourth lens 4016 has positive refractive power, a convex object-side surface, and a concave image-side surface. The fifth lens 5016 has negative refractive power, a concave object-side surface, and a convex image-side surface. The sixth lens 6016 has positive refractive power, a convex object-side surface, and a concave image-side surface. Furthermore, at least one inflection point is formed on any one or both surfaces of the object-side and image-side surfaces of the sixth lens 6016. The seventh lens 7016 has negative refractive power, a convex object-side surface, and a concave image-side surface. Furthermore, two inflection points are formed on the object-side surface of the seventh lens 7016, and one inflection point is formed on the image-side surface of the seventh lens 7016.

[0281] The optical imaging system 16 also includes an aperture stop, a filter 8016, and an image sensor 9016. The aperture stop is positioned between the second lens 2016 and the third lens 3016 to adjust the amount of light incident on the image sensor 9016. The filter 8016 is positioned between the seventh lens 7016 and the image sensor 9016 to block infrared light. The image sensor 9016 forms an imaging surface on which the image of the object is formed. Although Figure 31 The aperture is not shown, but it is positioned at a distance of 0.937 mm from the object side of the first lens 1016 in the direction toward the imaging surface of the optical imaging system 16. This distance is equal to TTL-SL and can be calculated from the TTL and SL values ​​of Example 16 listed in Table 59, which will be presented later in this application.

[0282] Table 31 below shows Figure 31 The physical properties of the lenses and other components of the optical imaging system are shown in Table 32 below. Figure 31 The aspherical coefficient of the lens.

[0283] Table 31

[0284] Table 32

[0285] Example 17

[0286] Figure 33 This is a view showing the seventeenth example of an optical imaging system, and Figure 34 It shows Figure 33 Aberration curves of optical imaging systems.

[0287] The optical imaging system 17 includes a first lens 1017, a second lens 2017, a third lens 3017, a fourth lens 4017, a fifth lens 5017, a sixth lens 6017, and a seventh lens 7017.

[0288] The first lens 1017 has positive refractive power, a convex object-side surface, and a concave image-side surface. The second lens 2017 has negative refractive power, a convex object-side surface, and a concave image-side surface. The third lens 3017 has positive refractive power, a convex object-side surface, and a concave image-side surface. The fourth lens 4017 has positive refractive power, a convex object-side surface, and a concave image-side surface. The fifth lens 5017 has negative refractive power, a concave object-side surface, and a convex image-side surface. The sixth lens 6017 has positive refractive power, a convex object-side surface, and a convex image-side surface. Furthermore, at least one inflection point is formed on any one or both surfaces of the object-side and image-side surfaces of the sixth lens 6017. The seventh lens 7017 has negative refractive power, a concave object-side surface, and a concave image-side surface. Furthermore, one inflection point is formed on each surface of the object-side and image-side surfaces of the seventh lens 7017.

[0289] The optical imaging system 17 also includes an aperture stop, a filter 8017, and an image sensor 9017. The aperture stop is positioned between the first lens 1017 and the second lens 2017 to adjust the amount of light incident on the image sensor 9017. The filter 8017 is positioned between the seventh lens 7017 and the image sensor 9017 to block infrared light. The image sensor 9017 forms an imaging surface on which the image of the object is formed. Although Figure 33 The aperture is not shown, but it is positioned at a distance of 0.683 mm from the object side of the first lens 1017 in the direction toward the imaging surface of the optical imaging system 17. This distance is equal to TTL-SL and can be calculated from the TTL and SL values ​​of Example 17 listed in Table 59, which will be presented later in this application.

[0290] Table 33 below shows Figure 33 The physical properties of the lenses and other components of the optical imaging system are shown in Table 34 below. Figure 33 The aspherical coefficient of the lens.

[0291] Table 33

[0292] Table 34

[0293] Example 18

[0294] Figure 35 This is a view showing the eighteenth example of an optical imaging system, and Figure 36 It shows Figure 35 Aberration curves of optical imaging systems.

[0295] The optical imaging system 18 includes a first lens 1018, a second lens 2018, a third lens 3018, a fourth lens 4018, a fifth lens 5018, a sixth lens 6018, and a seventh lens 7018.

[0296] The first lens 1018 has positive refractive power, a convex object-side surface, and a concave image-side surface. The second lens 2018 has negative refractive power, a convex object-side surface, and a concave image-side surface. The third lens 3018 has positive refractive power, a convex object-side surface, and a concave image-side surface. The fourth lens 4018 has positive refractive power, a convex object-side surface, and a concave image-side surface. The fifth lens 5018 has negative refractive power, a concave object-side surface, and a convex image-side surface. The sixth lens 6018 has negative refractive power, a convex object-side surface, and a concave image-side surface. Furthermore, at least one inflection point is formed on any one or both of the object-side and image-side surfaces of the sixth lens 6018. The seventh lens 7018 has negative refractive power, a convex object-side surface, and a concave image-side surface. Furthermore, one inflection point is formed on each of the object-side and image-side surfaces of the seventh lens 7018.

[0297] The optical imaging system 18 also includes an aperture stop, a filter 8018, and an image sensor 9018. The aperture stop is positioned before the first lens 1018 to adjust the amount of light incident on the image sensor 9018. The filter 8018 is positioned between the seventh lens 7018 and the image sensor 9018 to block infrared light. The image sensor 9018 forms an imaging surface on which an image of the object is formed. Although Figure 35 The aperture is not shown, but it is positioned at a distance of 0.250 mm from the object side of the first lens 1018 in the direction toward the imaging surface of the optical imaging system 18. This distance is equal to TTL-SL and can be calculated from the TTL and SL values ​​of Example 18 listed in Table 59, which will be presented later in this application.

[0298] Table 35 below shows Figure 35 The physical properties of the lenses and other components of the optical imaging system are shown in Table 36 below. Figure 35 The aspherical coefficient of the lens.

[0299] Table 35

[0300] Table 36

[0301] Example 19

[0302] Figure 37 This is a view illustrating the nineteenth example of an optical imaging system, and Figure 38 It shows Figure 37 Aberration curves of optical imaging systems.

[0303] The optical imaging system 19 includes a first lens 1019, a second lens 2019, a third lens 3019, a fourth lens 4019, a fifth lens 5019, a sixth lens 6019, and a seventh lens 7019.

[0304] The first lens 1019 has positive refractive power, a convex object-side surface, and a concave image-side surface. The second lens 2019 has negative refractive power, a convex object-side surface, and a concave image-side surface. The third lens 3019 has positive refractive power, a convex object-side surface, and a concave image-side surface. The fourth lens 4019 has positive refractive power, a convex object-side surface, and a convex image-side surface. The fifth lens 5019 has negative refractive power, a concave object-side surface, and a convex image-side surface. The sixth lens 6019 has positive refractive power, a convex object-side surface, and a convex image-side surface. Furthermore, at least one inflection point is formed on any one or both of the object-side and image-side surfaces of the sixth lens 6019. The seventh lens 7019 has negative refractive power, a concave object-side surface, and a concave image-side surface. Furthermore, one inflection point is formed on each of the object-side and image-side surfaces of the seventh lens 7019.

[0305] The optical imaging system 19 also includes an aperture stop, a filter 8019, and an image sensor 9019. The aperture stop is positioned between the first lens 1019 and the second lens 2019 to adjust the amount of light incident on the image sensor 9019. The filter 8019 is positioned between the seventh lens 7019 and the image sensor 9019 to block infrared light. The image sensor 9019 forms an imaging surface on which the image of the object is formed.

[0306] Table 37 below shows Figure 37 The physical properties of the lenses and other components of the optical imaging system are shown in Table 38 below. Figure 37 The aspherical coefficient of the lens.

[0307] Table 37

[0308] Table 38

[0309] Example 20

[0310] Figure 39 This is a view showing the twentieth example of an optical imaging system, and Figure 40 It shows Figure 39 Aberration curves of optical imaging systems.

[0311] The optical imaging system 20 includes a first lens 1020, a second lens 2020, a third lens 3020, a fourth lens 4020, a fifth lens 5020, a sixth lens 6020, and a seventh lens 7020.

[0312] The first lens 1020 has positive refractive power, a convex object-side surface, and a concave image-side surface. The second lens 2020 has negative refractive power, a convex object-side surface, and a concave image-side surface. The third lens 3020 has negative refractive power, a convex object-side surface, and a concave image-side surface. The fourth lens 4020 has positive refractive power, a convex object-side surface, and a concave image-side surface. The fifth lens 5020 has positive refractive power, a concave object-side surface, and a convex image-side surface. The sixth lens 6020 has positive refractive power, a convex object-side surface, and a convex image-side surface. Furthermore, at least one inflection point is formed on any one or both surfaces of the object-side and image-side surfaces of the sixth lens 6020. The seventh lens 7020 has negative refractive power, a concave object-side surface, and a concave image-side surface. Furthermore, an inflection point is formed on the image-side surface of the seventh lens 7020.

[0313] The optical imaging system 20 also includes an aperture stop, a filter 8020, and an image sensor 9020. The aperture stop is positioned between the first lens 1020 and the second lens 2020 to adjust the amount of light incident on the image sensor 9020. The filter 8020 is positioned between the seventh lens 7020 and the image sensor 9020 to block infrared light. The image sensor 9020 forms an imaging surface on which the image of the object is formed. Although Figure 39 The aperture is not shown, but it is positioned at a distance of 0.641 mm from the object side of the first lens 1020 in the direction toward the imaging surface of the optical imaging system 20. This distance is equal to TTL-SL and can be calculated from the TTL and SL values ​​of Example 20 listed in Table 59, which will be presented later in this application.

[0314] Table 39 below shows Figure 39 The physical properties of the lenses and other components of the optical imaging system are shown in Table 40 below. Figure 39 The aspherical coefficient of the lens.

[0315] Table 39

[0316] Table 40

[0317] Example 21

[0318] Figure 41 This is a view showing the twenty-first example of an optical imaging system, and Figure 42 It shows Figure 41 Aberration curves of optical imaging systems.

[0319] The optical imaging system 21 includes a first lens 1021, a second lens 2021, a third lens 3021, a fourth lens 4021, a fifth lens 5021, a sixth lens 6021, and a seventh lens 7021.

[0320] The first lens 1021 has positive refractive power, a convex object-side surface, and a concave image-side surface. The second lens 2021 has negative refractive power, a convex object-side surface, and a concave image-side surface. The third lens 3021 has negative refractive power, a convex object-side surface, and a concave image-side surface. The fourth lens 4021 has positive refractive power, a convex object-side surface, and a convex image-side surface. The fifth lens 5021 has negative refractive power, a concave object-side surface, and a convex image-side surface. The sixth lens 6021 has negative refractive power, a convex object-side surface, and a concave image-side surface. Furthermore, at least one inflection point is formed on any one or both of the object-side and image-side surfaces of the sixth lens 6021. The seventh lens 7021 has negative refractive power, a convex object-side surface, and a concave image-side surface. Furthermore, one inflection point is formed on each of the object-side and image-side surfaces of the seventh lens 7021.

[0321] The optical imaging system 21 also includes an aperture stop, a filter 8021, and an image sensor 9021. The aperture stop is positioned between the second lens 2021 and the third lens 3021 to adjust the amount of light incident on the image sensor 9021. The filter 8021 is positioned between the seventh lens 7021 and the image sensor 9021 to block infrared light. The image sensor 9021 forms an imaging surface on which the image of the object is formed. Although Figure 41 The aperture is not shown, but it is positioned at a distance of 0.920 mm from the object side of the first lens 1021 in the direction toward the imaging surface of the optical imaging system 21. This distance is equal to TTL-SL and can be calculated from the TTL and SL values ​​of Example 21 listed in Table 59, which will be presented later in this application.

[0322] Table 41 below shows Figure 41 The physical properties of the lenses and other components of the optical imaging system are shown in Table 42 below. Figure 41 The aspherical coefficient of the lens.

[0323] Table 41

[0324] Table 42

[0325] Example 22

[0326] Figure 43 This is a view showing the twenty-second example of an optical imaging system, and Figure 44 It shows Figure 43 Aberration curves of optical imaging systems.

[0327] The optical imaging system 22 includes a first lens 1022, a second lens 2022, a third lens 3022, a fourth lens 4022, a fifth lens 5022, a sixth lens 6022, and a seventh lens 7022.

[0328] The first lens 1022 has positive refractive power, a convex object-side surface, and a concave image-side surface. The second lens 2022 has negative refractive power, a convex object-side surface, and a concave image-side surface. The third lens 3022 has negative refractive power, a convex object-side surface, and a concave image-side surface. The fourth lens 4022 has positive refractive power, a convex object-side surface, and a convex image-side surface. The fifth lens 5022 has negative refractive power, a concave object-side surface, and a convex image-side surface. The sixth lens 6022 has negative refractive power, a convex object-side surface, and a concave image-side surface. Furthermore, at least one inflection point is formed on any one or both of the object-side and image-side surfaces of the sixth lens 6022. The seventh lens 7022 has negative refractive power, a convex object-side surface, and a concave image-side surface. Furthermore, two inflection points are formed on the object-side surface of the seventh lens 7022, and one inflection point is formed on the image-side surface of the seventh lens 7022.

[0329] The optical imaging system 22 also includes an aperture stop, a filter 8022, and an image sensor 9022. The aperture stop is positioned between the second lens 2022 and the third lens 3022 to adjust the amount of light incident on the image sensor 9022. The filter 8022 is positioned between the seventh lens 7022 and the image sensor 9022 to block infrared light. The image sensor 9022 forms an imaging surface on which the image of the object is formed. Although Figure 43 The aperture is not shown, but it is positioned at a distance of 0.901 mm from the object side of the first lens 1022 in the direction toward the imaging surface of the optical imaging system 22. This distance is equal to TTL-SL and can be calculated from the TTL and SL values ​​of Example 22 listed in Table 59, which will be presented later in this application.

[0330] Table 43 below shows Figure 43 The physical properties of the lenses and other components of the optical imaging system are shown in Table 44 below. Figure 43 The aspherical coefficient of the lens.

[0331] Table 43

[0332] Table 44

[0333] Example 23

[0334] Figure 45 This is a view showing the twenty-third example of an optical imaging system, and Figure 46 It shows Figure 45 Aberration curves of optical imaging systems.

[0335] The optical imaging system 23 includes a first lens 1023, a second lens 2023, a third lens 3023, a fourth lens 4023, a fifth lens 5023, a sixth lens 6023, and a seventh lens 7023.

[0336] The first lens 1023 has positive refractive power, a convex object-side surface, and a concave image-side surface. The second lens 2023 has positive refractive power, a convex object-side surface, and a concave image-side surface. The third lens 3023 has negative refractive power, a convex object-side surface, and a concave image-side surface. The fourth lens 4023 has negative refractive power, a convex object-side surface, and a concave image-side surface. The fifth lens 5023 has positive refractive power, a convex object-side surface, and a concave image-side surface. The sixth lens 6023 has positive refractive power, a convex object-side surface, and a convex image-side surface. Furthermore, at least one inflection point is formed on any one or both of the object-side and image-side surfaces of the sixth lens 6023. The seventh lens 7023 has negative refractive power, a concave object-side surface, and a concave image-side surface. Furthermore, one inflection point is formed on each of the object-side and image-side surfaces of the seventh lens 7023.

[0337] The optical imaging system 23 also includes an aperture stop, a filter 8023, and an image sensor 9023. The aperture stop is positioned between the second lens 2023 and the third lens 3023 to adjust the amount of light incident on the image sensor 9023. The filter 8023 is positioned between the seventh lens 7023 and the image sensor 9023 to block infrared light. The image sensor 9023 forms an imaging surface on which the image of the object is formed. Although Figure 45The aperture is not shown, but it is positioned at a distance of 1.051 mm from the object side of the first lens 1023 in the direction toward the imaging surface of the optical imaging system 23. This distance is equal to TTL-SL and can be calculated from the TTL and SL values ​​of Example 23 listed in Table 59, which will be presented later in this application.

[0338] Table 45 below shows Figure 45 The physical properties of the lenses and other components of the optical imaging system are shown in Table 46 below. Figure 45 The aspherical coefficient of the lens.

[0339] Table 45

[0340] Table 46

[0341] Example 24

[0342] Figure 47 This is a view showing the twenty-fourth example of an optical imaging system, and Figure 48 It shows Figure 47 Aberration curves of optical imaging systems.

[0343] The optical imaging system 24 includes a first lens 1024, a second lens 2024, a third lens 3024, a fourth lens 4024, a fifth lens 5024, a sixth lens 6024, and a seventh lens 7024.

[0344] The first lens 1024 has positive refractive power, a convex object-side surface, and a concave image-side surface. The second lens 2024 has positive refractive power, a convex object-side surface, and a concave image-side surface. The third lens 3024 has negative refractive power, a convex object-side surface, and a concave image-side surface. The fourth lens 4024 has positive refractive power, a convex object-side surface, and a concave image-side surface. The fifth lens 5024 has negative refractive power, a convex object-side surface, and a concave image-side surface. The sixth lens 6024 has positive refractive power, a convex object-side surface, and a concave image-side surface. Furthermore, at least one inflection point is formed on both the object-side and image-side surfaces of the sixth lens 6024. The seventh lens 7024 has positive refractive power, a convex object-side surface, and a concave image-side surface. Furthermore, two inflection points are formed on the object-side surface of the seventh lens 7024, and one inflection point is formed on the image-side surface of the seventh lens 7024.

[0345] The optical imaging system 24 also includes an aperture stop, a filter 8024, and an image sensor 9024. The aperture stop is positioned between the second lens 2024 and the third lens 3024 to adjust the amount of light incident on the image sensor 9024. The filter 8024 is positioned between the seventh lens 7024 and the image sensor 9024 to block infrared light. The image sensor 9024 forms an imaging surface on which the image of the object is formed. Although Figure 47 The aperture is not shown, but it is positioned at a distance of 1.128 mm from the object side of the first lens 1024 in the direction toward the imaging surface of the optical imaging system 24. This distance is equal to TTL-SL and can be calculated from the TTL and SL values ​​of Example 24 listed in Table 59, which will be presented later in this application.

[0346] Table 47 below shows Figure 47 The physical properties of the lenses and other components of the optical imaging system are shown in Table 48 below. Figure 47 The aspherical coefficient of the lens.

[0347] Table 47

[0348] Table 48

[0349] Example 25

[0350] Figure 49 This is a view showing the twenty-fifth example of an optical imaging system, and Figure 50 It shows Figure 49 Aberration curves of optical imaging systems.

[0351] The optical imaging system 25 includes a first lens 1025, a second lens 2025, a third lens 3025, a fourth lens 4025, a fifth lens 5025, a sixth lens 6025, and a seventh lens 7025.

[0352] The first lens 1025 has positive refractive power, a convex object-side surface, and a concave image-side surface. The second lens 2025 has negative refractive power, a convex object-side surface, and a concave image-side surface. The third lens 3025 has negative refractive power, a convex object-side surface, and a concave image-side surface. The fourth lens 4025 has positive refractive power, a convex object-side surface, and a concave image-side surface. The fifth lens 5025 has negative refractive power, a convex object-side surface, and a concave image-side surface. The sixth lens 6025 has negative refractive power, a concave object-side surface, and a concave image-side surface. Furthermore, at least one inflection point is formed on any one or both of the object-side and image-side surfaces of the sixth lens 6025. The seventh lens 7025 has positive refractive power, a convex object-side surface, and a concave image-side surface. Furthermore, one inflection point is formed on each of the object-side and image-side surfaces of the seventh lens 7025.

[0353] The optical imaging system 25 also includes an aperture stop, a filter 8025, and an image sensor 9025. The aperture stop is positioned between the second lens 2025 and the third lens 3025 to adjust the amount of light incident on the image sensor 9025. The filter 8025 is positioned between the seventh lens 7025 and the image sensor 9025 to block infrared light. The image sensor 9025 forms an imaging surface on which the image of the object is formed. Although Figure 49 The aperture is not shown, but it is positioned at a distance of 0.963 mm from the object side of the first lens 1025 in the direction toward the imaging surface of the optical imaging system 25. This distance is equal to TTL-SL and can be calculated from the TTL and SL values ​​of Example 25 listed in Table 59, which will be presented later in this application.

[0354] Table 49 below shows Figure 49 The physical properties of the lenses and other components of the optical imaging system are shown in Table 50 below. Figure 49 The aspherical coefficient of the lens.

[0355] Table 49

[0356] Table 50

[0357] Example 26

[0358] Figure 51 This is a view showing the twenty-sixth example of an optical imaging system, and Figure 52 It shows Figure 51 Aberration curves of optical imaging systems.

[0359] The optical imaging system 26 includes a first lens 1026, a second lens 2026, a third lens 3026, a fourth lens 4026, a fifth lens 5026, a sixth lens 6026, and a seventh lens 7026.

[0360] The first lens 1026 has positive refractive power, a convex object-side surface, and a concave image-side surface. The second lens 2026 has negative refractive power, a convex object-side surface, and a concave image-side surface. The third lens 3026 has positive refractive power, a convex object-side surface, and a concave image-side surface. The fourth lens 4026 has positive refractive power, a convex object-side surface, and a concave image-side surface. The fifth lens 5026 has positive refractive power, a concave object-side surface, and a convex image-side surface. The sixth lens 6026 has positive refractive power, a concave object-side surface, and a convex image-side surface. Furthermore, at least one inflection point is formed on any one or both of the object-side and image-side surfaces of the sixth lens 6026. The seventh lens 7026 has negative refractive power, a concave object-side surface, and a concave image-side surface. Furthermore, an inflection point is formed on the image-side surface of the seventh lens 7026.

[0361] The optical imaging system 26 also includes an aperture stop, a filter 8026, and an image sensor 9026. The aperture stop is positioned between the first lens 1026 and the second lens 2026 to adjust the amount of light incident on the image sensor 9026. The filter 8026 is positioned between the seventh lens 7026 and the image sensor 9026 to block infrared light. The image sensor 9026 forms an imaging surface on which the image of the object is formed. Although Figure 51 The aperture is not shown, but it is positioned at a distance of 0.857 mm from the object side of the first lens 1026 in the direction toward the imaging surface of the optical imaging system 26. This distance is equal to TTL-SL and can be calculated from the TTL and SL values ​​of Example 26 listed in Table 59, which will be presented later in this application.

[0362] Table 51 below shows Figure 51 The physical properties of the lenses and other components of the optical imaging system are shown in Table 52 below. Figure 51 The aspherical coefficient of the lens.

[0363] Table 51

[0364] Table 52

[0365] Example 27

[0366] Figure 53 This is a view showing the twenty-seventh example of an optical imaging system, and Figure 54 It shows Figure 53Aberration curves of optical imaging systems.

[0367] The optical imaging system 27 includes a first lens 1027, a second lens 2027, a third lens 3027, a fourth lens 4027, a fifth lens 5027, a sixth lens 6027, and a seventh lens 7027.

[0368] The first lens 1027 has positive refractive power, a convex object-side surface, and a concave image-side surface. The second lens 2027 has negative refractive power, a convex object-side surface, and a concave image-side surface. The third lens 3027 has positive refractive power, a concave object-side surface, and a convex image-side surface. The fourth lens 4027 has negative refractive power, a convex object-side surface, and a concave image-side surface. The fifth lens 5027 has positive refractive power, a concave object-side surface, and a convex image-side surface. The sixth lens 6027 has positive refractive power, a concave object-side surface, and a convex image-side surface. Furthermore, at least one inflection point is formed on any one or both surfaces of the object-side and image-side surfaces of the sixth lens 6027. The seventh lens 7027 has negative refractive power, a concave object-side surface, and a concave image-side surface. Furthermore, an inflection point is formed on the image-side surface of the seventh lens 7027.

[0369] The optical imaging system 27 also includes an aperture stop, a filter 8027, and an image sensor 9027. The aperture stop is positioned between the second lens 2027 and the third lens 3027 to adjust the amount of light incident on the image sensor 9027. The filter 8027 is positioned between the seventh lens 7027 and the image sensor 9027 to block infrared light. The image sensor 9027 forms an imaging surface on which the image of the object is formed. Although Figure 53 The aperture is not shown, but it is positioned at a distance of 0.872 mm from the object side of the first lens 1027 in the direction toward the imaging surface of the optical imaging system 27. This distance is equal to TTL-SL and can be calculated from the TTL and SL values ​​of Example 27 listed in Table 59, which will be presented later in this application.

[0370] Table 53 below shows Figure 53 The physical properties of the lenses and other components of the optical imaging system are shown in Table 54 below. Figure 53 The aspherical coefficient of the lens.

[0371] Table 53

[0372] Table 54

[0373] Example 28

[0374] Figure 55This is a view showing the twenty-eighth example of an optical imaging system, and Figure 56 It shows Figure 55 Aberration curves of optical imaging systems.

[0375] The optical imaging system 28 includes a first lens 1028, a second lens 2028, a third lens 3028, a fourth lens 4028, a fifth lens 5028, a sixth lens 6028, and a seventh lens 7028.

[0376] The first lens 1028 has positive refractive power, a convex object-side surface, and a concave image-side surface. The second lens 2028 has negative refractive power, a convex object-side surface, and a concave image-side surface. The third lens 3028 has positive refractive power, a concave object-side surface, and a convex image-side surface. The fourth lens 4028 has positive refractive power, a convex object-side surface, and a concave image-side surface. The fifth lens 5028 has negative refractive power, a convex object-side surface, and a concave image-side surface. The sixth lens 6028 has positive refractive power, a convex object-side surface, and a concave image-side surface. Furthermore, at least one inflection point is formed on any one or both surfaces of the object-side and image-side surfaces of the sixth lens 6028. The seventh lens 7028 has positive refractive power, a convex object-side surface, and a concave image-side surface. Furthermore, two inflection points are formed on the object-side surface of the seventh lens 7028, and one inflection point is formed on the image-side surface of the seventh lens 7028.

[0377] The optical imaging system 28 also includes an aperture stop, a filter 8028, and an image sensor 9028. The aperture stop is positioned between the second lens 2028 and the third lens 3028 to adjust the amount of light incident on the image sensor 9028. The filter 8028 is positioned between the seventh lens 7028 and the image sensor 9028 to block infrared light. The image sensor 9028 forms an imaging surface on which the image of the object is formed. Although Figure 55 The aperture is not shown, but it is positioned at a distance of 0.866 mm from the object side of the first lens 1028 in the direction toward the imaging surface of the optical imaging system 28. This distance is equal to TTL-SL and can be calculated from the TTL and SL values ​​of Example 28 listed in Table 59, which will be presented later in this application.

[0378] Table 55 below shows Figure 55 The physical properties of the lenses and other components of the optical imaging system are shown in Table 56 below. Figure 55 The aspherical coefficient of the lens.

[0379] Table 55

[0380] Table 56

[0381] Example 29

[0382] Figure 57 This is a view showing the twenty-ninth example of an optical imaging system, and Figure 58 It shows Figure 57 Aberration curves of optical imaging systems.

[0383] The optical imaging system 29 includes a first lens 1029, a second lens 2029, a third lens 3029, a fourth lens 4029, a fifth lens 5029, a sixth lens 6029, and a seventh lens 7029.

[0384] The first lens 1029 has positive refractive power, a convex object-side surface, and a concave image-side surface. The second lens 2029 has negative refractive power, a convex object-side surface, and a concave image-side surface. The third lens 3029 has positive refractive power, a concave object-side surface, and a convex image-side surface. The fourth lens 4029 has positive refractive power, a convex object-side surface, and a concave image-side surface. The fifth lens 5029 has negative refractive power, a convex object-side surface, and a concave image-side surface. The sixth lens 6029 has positive refractive power, a convex object-side surface, and a concave image-side surface. Furthermore, at least one inflection point is formed on any one or both surfaces of the object-side and image-side surfaces of the sixth lens 6029. The seventh lens 7029 has positive refractive power, a convex object-side surface, and a concave image-side surface. Furthermore, two inflection points are formed on the object-side surface of the seventh lens 7029, and one inflection point is formed on the image-side surface of the seventh lens 7029.

[0385] The optical imaging system 29 also includes an aperture stop, a filter 8029, and an image sensor 9029. The aperture stop is positioned between the second lens 2029 and the third lens 3029 to adjust the amount of light incident on the image sensor 9029. The filter 8029 is positioned between the seventh lens 7029 and the image sensor 9029 to block infrared light. The image sensor 9029 forms an imaging surface on which the image of the object is formed. Although Figure 57 The aperture is not shown, but it is positioned at a distance of 0.904 mm from the object side of the first lens 1029 in the direction toward the imaging surface of the optical imaging system 29. This distance is equal to TTL-SL and can be calculated from the TTL and SL values ​​of Example 29 listed in Table 59, which will be presented later in this application.

[0386] Table 57 below shows Figure 57 The physical properties of the lenses and other components of the optical imaging system are shown in Table 58 below. Figure 57 The aspherical coefficient of the lens.

[0387] Table 57

[0388] Table 58

[0389] Table 59 below shows the total focal length f, the total length TTL (distance from the object side of the first lens to the imaging plane), the distance SL from the aperture stop to the imaging plane, the f-number (F No.) (the total focal length f divided by the entrance pupil diameter, where f and entrance pupil diameter are both expressed in mm), the image height on the imaging plane (IMG HT) (half the diagonal length of the imaging plane), and the field of view (FOV) of the optical imaging system for each of the examples 1 to 29 described herein. The values ​​of f, TTL, SL, and IMG HT are expressed in mm. The value of F No. is dimensionless. The value of FOV is expressed in degrees.

[0390] Table 59

[0391] Table 60 below shows the focal lengths, in mm, of the first lens f1, the second lens f2, the third lens f3, the fourth lens f4, the fifth lens f5, the sixth lens f6, and the seventh lens f7 for each of the examples 1 to 29 described herein.

[0392] Table 60

[0393] Table 61 below shows, in mm, the edge thickness of the first lens (L1edgeT), the edge thickness of the second lens (L2edgeT), the edge thickness of the third lens (L3edgeT), the edge thickness of the fourth lens (L4edgeT), the edge thickness of the fifth lens (L5edgeT), the edge thickness of the sixth lens (L6edgeT), and the edge thickness of the seventh lens (L7edgeT) for each of the examples 1 to 29 described herein.

[0394] Table 61

[0395] Table 62 below shows, in mm, the sag value (L5S1 sag) of the object side of the fifth lens, the sag value (L5S2 sag) of the image side of the fifth lens, the thickness (Yc71P1) of the seventh lens at the first inflection point on the object side of the seventh lens, the thickness (Yc71P2) of the seventh lens at the second inflection point on the object side of the seventh lens, the thickness (Yc72P1) of the seventh lens at the first inflection point on the image side of the seventh lens, and the thickness (Yc72P2) of the seventh lens at the second inflection point on the image side of the seventh lens.

[0396] Table 62

[0397] Table 63 below shows the inner diameter of each of the first to seventh spacers for each of the examples 1 to 29 described herein. S1d is the inner diameter of the first spacer SP1, S2d is the inner diameter of the second spacer SP2, S3d is the inner diameter of the third spacer SP3, S4d is the inner diameter of the fourth spacer SP4, S5d is the inner diameter of the fifth spacer SP5, S6d is the inner diameter of the sixth spacer SP6, and S7d is the inner diameter of the seventh spacer SP7.

[0398] Table 63

[0399] Table 64 below shows the figures in mm for each of the examples 1 to 29 described herein. 3 L1v represents the volume of each of the first through seventh lenses. L2v is the volume of the first lens, L3v is the volume of the third lens, L4v is the volume of the fourth lens, L5v is the volume of the fifth lens, L6v is the volume of the sixth lens, and L7v is the volume of the seventh lens.

[0400] Table 64

[0401] Table 65 below shows the weight, expressed in mg, of each of the first through seventh lenses for each of the examples 1 through 29 described herein. L1w is the weight of the first lens, L2w is the weight of the second lens, L3w is the weight of the third lens, L4w is the weight of the fourth lens, L5w is the weight of the fifth lens, L6w is the weight of the sixth lens, and L7w is the weight of the seventh lens.

[0402] Table 65

[0403] Table 66 below shows the total outer diameter (including ribs) of each of the first through seventh lenses, expressed in mm, for each of the examples 1 through 29 described herein. L1TR is the total outer diameter of the first lens, L2TR is the total outer diameter of the second lens, L3TR is the total outer diameter of the third lens, L4TR is the total outer diameter of the fourth lens, L5TR is the total outer diameter of the fifth lens, L6TR is the total outer diameter of the sixth lens, and L7TR is the total outer diameter of the seventh lens.

[0404] Table 66

[0405] Table 67 below shows the thickness, in mm, of the flat portion of the rib of each of the first through seventh lenses for each of the examples 1 through 29 described herein. L1rt is the thickness of the flat portion of the rib of the first lens, L2rt is the thickness of the flat portion of the rib of the second lens, L3rt is the thickness of the flat portion of the rib of the third lens, L4rt is the thickness of the flat portion of the rib of the fourth lens, L5rt is the thickness of the flat portion of the rib of the fifth lens, L6rt is the thickness of the flat portion of the rib of the sixth lens, and L7rt is the thickness of the flat portion of the rib of the seventh lens.

[0406] Table 67

[0407] Table 68 below shows the dimensionless value of each of the following proportions for each of the examples 1 through 29 described herein: L1w / L7w in conditional expressions 1 and 6, S6d / f in conditional expressions 2 and 7, L1TR / L7TR in conditional expressions 3 and 8, L1234TRavg / L7TR in conditional expressions 4 and 9, and L12345TRavg / L7TR in conditional expressions 5 and 10. The dimensionless value of each of these proportions is obtained by dividing two values ​​expressed in the same unit of measurement.

[0408] Table 68

[0409] Figure 59 and Figure 60 This is a cross-sectional view showing an example of an optical imaging system and lens barrel connected to each other.

[0410] Examples of the optical imaging system 100 described in this application may include, for example: Figure 59 and Figure 60 The self-aligned structure shown.

[0411] exist Figure 59In one example shown, the optical imaging system 100 includes a self-alignment structure in which the optical axes of four consecutive lenses 1000, 2000, 3000 and 4000 are aligned with the optical axis of the optical imaging system 100 by connecting the four lenses 1000, 2000, 3000 and 4000 to each other.

[0412] A first lens 1000, located closest to the object side of the optical imaging system 100, is configured to contact the inner surface of the lens barrel 200, aligning the optical axis of the first lens 100 with the optical axis of the optical imaging system 100. A second lens 2000 is connected to the first lens 1000, aligning its optical axis with the optical axis of the optical imaging system 100. A third lens 3000 is connected to the second lens 2000, aligning its optical axis with the optical axis of the optical imaging system 100. A fourth lens 4000 is connected to the third lens 3000, aligning its optical axis with the optical axis of the optical imaging system 100. The second to fourth lenses 2000 may be configured not to contact the inner surface of the lens barrel 200.

[0413] although Figure 59 The diagram shows that the first lens 1000 to the fourth lens 4000 are connected to each other, but the four consecutive lenses connected to each other can be changed to the second lens 2000 to the fifth lens 5000, the third lens 3000 to the sixth lens 6000, or the fourth lens 4000 to the seventh lens 7000.

[0414] exist Figure 60 In another example shown, the optical imaging system 100 includes a self-alignment structure in which the optical axes of five consecutive lenses 1000, 2000, 3000, 4000 and 5000 are aligned with the optical axis of the optical imaging system 100 by connecting the five lenses 1000, 2000, 3000, 4000 and 5000 to each other.

[0415] The first lens 1000, located closest to the object side of the optical imaging system 100, is configured to contact the inner surface of the lens barrel, aligning the optical axis of the first lens 100 with the optical axis of the optical imaging system 100. A second lens 2000 is connected to the first lens 1000, aligning its optical axis with the optical axis of the optical imaging system 100. A third lens 3000 is connected to the second lens 2000, aligning its optical axis with the optical axis of the optical imaging system 100. A fourth lens 4000 is connected to the third lens 3000, aligning its optical axis with the optical axis of the optical imaging system 100. A fifth lens 5000 is connected to the fourth lens 4000, aligning its optical axis with the optical axis of the optical imaging system 100. The second to fifth lenses 2000 may be configured not to contact the inner surface of the lens barrel 200.

[0416] although Figure 60 The diagram shows that the first lens 1000 to the fifth lens 5000 are connected to each other, but the five consecutive lenses connected to each other can be changed to the second lens 2000 to the sixth lens 6000 or the third lens 3000 to the seventh lens 7000.

[0417] Figure 61 This is a cross-sectional view showing an example of the seventh lens.

[0418] Figure 61 The following are shown: the total outer diameter of the seventh lens (L7TR), the thickness of the flat portion of the rib of the seventh lens (L7rt), the thickness of the edge of the seventh lens (L7edgeT), the thickness of the seventh lens at the first inflection point on the object side of the seventh lens (Yc71P1), the thickness of the seventh lens at the second inflection point on the object side of the seventh lens (Yc71P2), and the thickness of the seventh lens at the first inflection point on the image side of the seventh lens (Yc72P1). Although Figure 61 The seventh lens is not shown in the table, but it may also have a second inflection point on the image side of the seventh lens, and the thickness of the seventh lens at the inflection point is Yc72P2 as listed in the header of Table 62.

[0419] Figure 62 This is a cross-sectional view showing an example of the shape of the ribs of a lens.

[0420] Examples of the optical imaging system 100 described in this application may include structures for preventing flickering and reflections.

[0421] For example, such as Figure 62As shown, the ribs of the first to seventh lenses 1000, 2000, 3000, 4000, 5000, 6000, and 7000 of the optical imaging system may be partially surface-treated to roughen the surface of the ribs. Surface treatment methods may include chemical etching, physical polishing, or any other surface treatment method capable of increasing surface roughness.

[0422] The surface-treated area EA can be formed over the entire area from the edge of the optical portion of the lens to the outer end of the rib, where light actually passes through the optical portion. However, as... Figure 62 As shown, the untreated region NEA, including the stepped portions E11, E21, and E22, may not undergo surface treatment, or it may undergo surface treatment to have a roughness different from that of the surface-treated region EA. The stepped portions E11, E21, and E22 are where the thickness of the rib changes abruptly. The width G1 of the first untreated region NEA formed on the object-side surface of the lens may differ from the width G2 of the second untreated region NEA formed on the image-side surface of the lens. Figure 62 In the example shown, G1 is greater than G2.

[0423] The unprocessed region NEA with width G1 includes a first step portion E11, and the unprocessed region NEA with width G2 includes a second step portion E21 and a third step portion E22. The distance G4 from the outer end of the rib to the second step portion E21 is less than the distance G3 from the outer end of the rib to the first step portion E11. Similarly, the distance G5 from the outer end of the rib to the third step portion E22 is less than the distance G3 from the outer end of the rib to the first step portion E11.

[0424] As described above, the positions of the unprocessed region NEA and the stepped portions E11, E21, and E22 can facilitate the measurement of the lens's concentricity.

[0425] The above examples enable the miniaturization of optical imaging systems and the easy correction of aberrations.

[0426] While this disclosure includes specific examples, it will be apparent upon understanding the disclosure of this application that various changes in form and detail may be made to these examples without departing from the spirit and scope of the claims and their equivalents. The examples described herein should be considered descriptive only and not for limiting purposes. The description of features or aspects in each example should be considered applicable to similar features or aspects in other examples. Suitable results may also be obtained if the described techniques are performed in a different order, and / or if components in the described system, architecture, apparatus, 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 detailed description but by the claims and their equivalents, and all variations within the scope of the claims and their equivalents should be understood to be included in this disclosure.

Claims

1. An optical imaging system, comprising: A first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens are arranged sequentially in numerical order along the optical axis of the optical imaging system from the object side of the optical imaging system toward the imaging surface of the optical imaging system. The optical imaging system comprises a total of seven lenses with refractive power. The image-side surface of the fifth lens is concave. Wherein, at least one inflection point is formed on any one or both of the object-side and image-side surfaces of the sixth lens; Wherein, at least one inflection point is formed on either or both of the object-side and image-side surfaces of the seventh lens. The fifth lens has negative refractive power, the sixth lens has positive refractive power, and the seventh lens has negative refractive power. The optical imaging system satisfies 0.5 < L1234TRavg / L7TR < 0.9, 0.05 < R1 / R6 < 0.9, and 0 < min(f1:f3) / max(f4:f7), where L1234TRavg is the average of the total outer diameters of the first to fourth lenses, L7TR is the total outer diameter of the seventh lens, R1 is the radius of curvature of the object-side surface of the first lens, R6 is the radius of curvature of the image-side surface of the third lens, min(f1:f3) is the minimum absolute value of the focal lengths of the first to third lenses, and max(f4:f7) is the maximum absolute value of the focal lengths of the fourth to seventh lenses. Furthermore, L1234TRavg and L7TR are expressed in the same unit of measurement. The optical imaging system satisfies SD56 < SD67, where SD56 is the distance along the optical axis from the image-side surface of the fifth lens to the object-side surface of the sixth lens, and SD67 is the distance along the optical axis from the image-side surface of the sixth lens to the object-side surface of the seventh lens, and SD56 and SD67 are expressed in the same unit of measurement.

2. The optical imaging system according to claim 1, wherein, The object side of the second lens is convex, the image side of the second lens is concave, the object side of the third lens is convex, the object side of the sixth lens is convex, and the image side of the seventh lens is concave.

3. The optical imaging system according to claim 1, wherein, The optical imaging system satisfies 0.4 < D13 / D57 < 1.2, where D13 is the distance along the optical axis from the object-side surface of the first lens to the image-side surface of the third lens, and D57 is the distance along the optical axis from the object-side surface of the fifth lens to the image-side surface of the seventh lens, wherein D13 and D57 are expressed in the same unit of measurement.

4. The optical imaging system according to claim 1, wherein, The optical imaging system satisfies 0.1 < (1 / f1+1 / f2+1 / f3+1 / f4+1 / f5+1 / f6+1 / f7) f < 0.8, where f1 is the focal length of the first lens, f2 is the focal length of the second lens, f3 is the focal length of the third lens, f4 is the focal length of the fourth lens, f5 is the focal length of the fifth lens, f6 is the focal length of the sixth lens, f7 is the focal length of the seventh lens, and f is the total focal length of the optical imaging system. Here, f1, f2, f3, f4, f5, f6, f7 and f are expressed in the same unit of measurement.

5. The optical imaging system according to claim 1, wherein, The optical imaging system satisfies 0.1 < (1 / f1+1 / f2+1 / f3+1 / f4+1 / f5+1 / f6+1 / f7) TTL < 1.0, where f1 is the focal length of the first lens, f2 is the focal length of the second lens, f3 is the focal length of the third lens, f4 is the focal length of the fourth lens, f5 is the focal length of the fifth lens, f6 is the focal length of the sixth lens, f7 is the focal length of the seventh lens, and TTL is the distance along the optical axis from the object side of the first lens to the imaging surface of the image sensor of the optical imaging system, wherein f1, f2, f3, f4, f5, f6, f7 and TTL are expressed in the same unit of measurement.

6. The optical imaging system according to claim 1, wherein, The optical imaging system satisfies SD12 < SD34, where SD12 is the distance along the optical axis from the image-side surface of the first lens to the object-side surface of the second lens, and SD34 is the distance along the optical axis from the image-side surface of the third lens to the object-side surface of the fourth lens.

7. The optical imaging system according to claim 1, wherein, The optical imaging system satisfies 0.6 < TTL / (2 (IMG HT)) < 0.9, where TTL is the distance along the optical axis from the object side of the first lens to the imaging surface of the image sensor of the optical imaging system, and IMG HT is half the diagonal length of the imaging surface of the image sensor, wherein TTL and IMG HT are expressed in the same unit of measurement.

8. The optical imaging system according to claim 1, wherein, The optical imaging system satisfies 0.2 < ΣSD / ΣTD < 0.7, where ΣSD is the sum of the air gaps between the lenses along the optical axis, and ΣTD is the sum of the thicknesses of the lenses along the optical axis, wherein ΣSD and ΣTD are expressed in the same unit of measurement.

9. The optical imaging system according to claim 1, wherein, The optical imaging system satisfies 0.4 < (ΣTD) / TTL < 0.7, where ΣTD is the sum of the thicknesses of each lens along the optical axis, and TTL is the distance along the optical axis from the object side of the first lens to the imaging surface of the image sensor of the optical imaging system, wherein ΣTD and TTL are expressed in the same unit of measurement.

10. An optical imaging system, comprising: A first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens are arranged sequentially in numerical order along the optical axis of the optical imaging system from the object side of the optical imaging system toward the imaging surface of the optical imaging system. The optical imaging system comprises a total of seven lenses with refractive power. The image-side surface of the fifth lens is concave. The optical imaging system satisfies 0.5 < L1234TRavg / L7TR < 0.9, 0.05 < R1 / R6 < 0.9, and 0 < min(f1:f3) / max(f4:f7), where L1234TRavg is the average of the total outer diameters of the first to fourth lenses, L7TR is the total outer diameter of the seventh lens, R1 is the radius of curvature of the object-side surface of the first lens, R6 is the radius of curvature of the image-side surface of the third lens, min(f1:f3) is the minimum absolute value of the focal lengths of the first to third lenses, and max(f4:f7) is the maximum absolute value of the focal lengths of the fourth to seventh lenses. Furthermore, L1234TRavg and L7TR are expressed in the same unit of measurement. The optical imaging system satisfies SD56 < SD67, where SD56 is the distance along the optical axis from the image-side surface of the fifth lens to the object-side surface of the sixth lens, and SD67 is the distance along the optical axis from the image-side surface of the sixth lens to the object-side surface of the seventh lens, and SD56 and SD67 are expressed in the same unit of measurement.

11. The optical imaging system according to claim 10, wherein, The object side of the first lens is convex, and the image side of the first lens is concave. The object side of the second lens is convex, and the image side of the second lens is concave. The object side of the third lens is convex, and the image side of the third lens is concave. The object side of the fourth lens is convex, the object side of the fifth lens is convex, the object side of the sixth lens is convex, and the object side of the seventh lens is concave. The image side of the seventh lens is concave.

12. The optical imaging system according to claim 10, wherein, The first lens has positive refractive power, the second lens has negative refractive power, the fourth lens has positive refractive power, the fifth lens has negative refractive power, the sixth lens has positive refractive power, and the seventh lens has negative refractive power.

13. The optical imaging system according to claim 10, wherein, At least one inflection point is formed on either or both of the object side surface and the image side surface of the sixth lens, and / or At least one inflection point is formed on either or both of the object side surface and the image side surface of the seventh lens.

14. The optical imaging system according to claim 10, further comprising a spacer disposed between the sixth lens and the seventh lens, in, The optical imaging system further satisfies 0.5 < S6d / f < 1.2, where S6d is the inner diameter of the spacer, f is the total focal length of the optical imaging system, and S6d and f are expressed in the same measurement unit.

15. The optical imaging system according to claim 10, wherein, The optical imaging system further satisfies 0.4 <L1TR / L7TR < 0.7, where L1TR is the total outer diameter of the first lens, and L1TR and L7TR are expressed in the same measurement unit.

16. The optical imaging system according to claim 10, wherein, The optical imaging system further satisfies 0.5 <L1234TRavg / L7TR < 0.

75.

17. The optical imaging system according to claim 10, wherein, The optical imaging system further satisfies 0.5 <L12345TRavg / L7TR < 0.76, where L12345TRavg is the average value of the total outer diameters of the first lens to the fifth lens, and L12345TRavg and L7TR are expressed in the same measurement unit.

Images