Optical imaging system

Abstract

An optical imaging system is disclosed. The optical imaging system includes: a first lens group comprising multiple lenses and having negative refractive power; a second lens group comprising multiple lenses and having positive refractive power; and a third lens group comprising multiple lenses and having negative refractive power, wherein the first to third lens groups are arranged sequentially from the object side, at least one of the first to third lens groups is movable along the optical axis to change the distance between the first to third lens groups, among the multiple lenses in the first lens group, the lens closest to the object side has a convex object-side surface, among the multiple lenses in the first lens group, the lens closest to the second lens group has a concave image-side surface, among the multiple lenses in the second lens group, the lens closest to the first lens group has both a convex object-side surface and a convex image-side surface, and among the multiple lenses in the second lens group, the lens closest to the third lens group has a concave image-side surface.

Description

[0001] Cross-reference to related applications

[0002] This application claims priority to Korean Patent Application No. 10-2019-0107776, filed with the Korean Intellectual Property Office on August 30, 2019, the entire disclosure of which is incorporated herein by reference for all purposes. Technical Field

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

[0004] Camera modules can be used in portable electronic devices such as smartphones. Recently, the need for miniaturization in such portable electronic devices has driven the miniaturization of camera modules installed in them.

[0005] However, in the prior art, when multiple lenses are arranged in the thickness direction in a portable electronic device, the thickness of the portable electronic device increases with the increase in the number of lenses, which may pose a problem in miniaturizing such a portable electronic device.

[0006] Therefore, when multiple lenses are arranged in the length or width direction in a portable electronic device, the thickness of the portable electronic device cannot be affected even if the number of lenses increases. However, in this case, the diameter of the lens affects the thickness of the portable electronic device, so there may be limitations in reducing the thickness of the portable electronic device due to the lens diameter.

[0007] Simultaneously, zoom functionality can be achieved by adjusting the distance between multiple lenses to change the focal length. However, when lenses in portable electronic devices are positioned in the thickness direction as in existing technologies, there is a problem that the spacing between lenses is difficult to adjust due to thickness limitations.

[0008] The above information is presented as background information only to aid in understanding this disclosure. No determination or assertion is made as to whether any of the above content can be used as prior art in relation to this disclosure. Summary of the Invention

[0009] 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 to help determine the scope of the claimed subject matter.

[0010] In one aspect, an optical imaging system includes: a first lens group including a first lens and a second lens; a second lens group including a third lens, a fourth lens and a fifth lens; and a third lens group including a sixth lens and a seventh lens, wherein the first lens to the seventh lens are sequentially arranged from an object side toward an image side, at least one of the first lens group to the third lens group moves along an optical axis to change a distance between the first lens group to the third lens group, and the following conditional expression is satisfied: 0.2 < BFL / (2×IMG HT) < 2.0, wherein BFL is a distance on the optical axis from an image side surface of the seventh lens to an imaging surface of an image sensor, and IMG HT is half of a diagonal length of the imaging surface of the image sensor.

[0011] In another aspect, an optical imaging system includes: a first lens group including a first lens, a second lens, a third lens and a fourth lens; and a second lens group including a fifth lens and a sixth lens, wherein the first lens to the sixth lens are sequentially arranged from an object side toward an image side, at least one of the first lens group and the second lens group moves along an optical axis to change a distance between the first lens group and the second lens group, and the following conditional expression is satisfied: 0.2 < BFL / (2×IMG HT) < 2.0, wherein BFL is a distance on the optical axis from an image side surface of the sixth lens to an imaging surface of an image sensor, and IMG HT is half of a diagonal length of the imaging surface of the image sensor.

[0012] In one general aspect, an optical imaging system includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a reflecting member, the reflecting member is disposed on an object side of the first lens to change an optical path, wherein the first lens to the sixth lens are sequentially disposed from the object side toward an image side.

[0013] When viewed in an optical axis direction, one or more of the first lens and the second lens may have substantially parallel linear sides connecting curved sides.

[0014] When viewed in an optical axis direction, the first lens may have substantially parallel linear sides connecting curved sides, and L1S1el may be a maximum effective radius of an object side surface of the first lens, L1S1es may be a minimum effective radius of the object side surface of the first lens, and 0.7 ≤ L1S1es / L1S1el < 0.95 may be satisfied.

[0015] When viewed along the optical axis, the second lens may have a substantially parallel linear side connecting the arcuate side, and L2S1el may be the maximum effective radius of the object side of the second lens, L2S1es may be the minimum effective radius of the object side of the second lens, and may satisfy 0.7≤L2S1es / L2S1el<0.95.

[0016] When viewed in the direction of the optical axis, the first lens may have substantially parallel linear sides connecting the arcuate sides, and α may be the angle between the first virtual line and the second virtual line, the first virtual line connecting the optical axis from a first connection point of one linear side and one arcuate side, the second virtual line connecting the optical axis from a second connection point of the first lens from the one linear side and the other arcuate side, and may satisfy 45° < α < 93°.

[0017] FOV can be the field of view of an optical imaging system, and it can satisfy 1.0 < α / (2×FOV) < 3.0.

[0018] The optical imaging system may also include a spacer disposed between the first lens and the second lens, the spacer having an opening for transmitting light, the first lens and the second lens each having substantially parallel linear sides connecting the arcuate sides when viewed in the optical axis direction, and the outer peripheral surface of the spacer corresponding to the shape of the first lens and the second lens.

[0019] s1el can be the maximum radius of the opening of the spacer, and s1es can be the minimum radius of the opening of the spacer, and can satisfy 0.7≤s1es / s1el<0.95.

[0020] The optical imaging system may also include an imaging surface disposed on the image side of the sixth lens. PTTL can be the distance along the optical axis from the reflecting surface of the reflecting member to the imaging surface of the image sensor, and can satisfy 17.0 mm < PTTL < 22.0 mm.

[0021] The first lens may have a convex object-side surface and an image-side surface.

[0022] The second lens can have a concave object side and a convex image side.

[0023] The third lens can have a concave object-side surface and an image-side surface.

[0024] The fourth lens can have a convex object side and a concave image side.

[0025] The fifth lens can have positive refractive power, a concave object side, and a convex image side.

[0026] The sixth lens can have positive refractive power, a concave object side, and a convex image side.

[0027] The first to fourth lenses can form a first lens group with positive refractive power, and the fifth and sixth lenses can form a second lens group with positive refractive power. One or more of the first and second lens groups can be configured to move along the optical axis to change the total focal length of the optical imaging system.

[0028] In another 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, a seventh lens, and a first reflecting member. The first reflecting member is disposed on the object side of the first lens to change the optical path, wherein the first lens to the seventh lens are arranged sequentially from the object side toward the image side.

[0029] The optical imaging system may also include an imaging surface and a second reflecting member. The imaging surface is disposed on the image side of the seventh lens, and the second reflecting member is disposed between the image side of the seventh lens and the imaging surface to change the optical path.

[0030] The first lens may have a convex object-side surface.

[0031] The third lens can have a convex image-side surface.

[0032] The fourth lens may have a concave object-side surface.

[0033] The fifth lens may have a convex object-side surface.

[0034] The sixth lens can have a concave object side and a convex image side.

[0035] When viewed along the optical axis, one or more of the first and second lenses may have substantially parallel linear sides connecting the arcuate sides.

[0036] The first and second lenses can form a first lens group, the third to fifth lenses can form a second lens group, and the sixth and seventh lenses can form a third lens group. One or more of the first, second, and third lens groups can be configured to move along the optical axis to change the total focal length of the optical imaging system.

[0037] Other features and aspects will become apparent from the following detailed description, the accompanying drawings, and the appended claims. Attached Figure Description

[0038] Figure 1 This is a configuration diagram of an optical imaging system according to a first embodiment of the present disclosure.

[0039] Figure 2 It is shown Figure 1 The curves showing the aberration characteristics of the optical imaging system are shown.

[0040] Figure 3 This is a configuration diagram of an optical imaging system according to a second embodiment of the present disclosure.

[0041] Figure 4 It is shown Figure 3 The curves showing the aberration characteristics of the optical imaging system are shown.

[0042] Figure 5 This is a configuration diagram of an optical imaging system according to a third embodiment of the present disclosure.

[0043] Figure 6 It is shown Figure 5 The curves showing the aberration characteristics of the optical imaging system are shown.

[0044] Figure 7 This is a configuration diagram of an optical imaging system according to the fourth embodiment of this disclosure.

[0045] Figure 8 It is shown Figure 7 The curves showing the aberration characteristics of the optical imaging system are shown.

[0046] Figure 9 This is a configuration diagram of an optical imaging system according to the fifth embodiment of this disclosure.

[0047] Figure 10 It is shown Figure 9 The curves showing the aberration characteristics of the optical imaging system are shown.

[0048] Figure 11 This is a configuration diagram of an optical imaging system according to the sixth embodiment of this disclosure.

[0049] Figure 12 It is shown Figure 11 The curves showing the aberration characteristics of the optical imaging system are shown.

[0050] Figure 13 This is a schematic perspective view of an optical imaging system according to an embodiment of the present disclosure.

[0051] Figure 14 and Figure 15 This is a plan view of the first lens of an optical imaging system according to an embodiment of the present disclosure.

[0052] Figure 16 This is a plan view of the first spacer ring of an optical imaging system according to an embodiment of the present disclosure.

[0053] Figures 17 to 20 This is a view of a portable electronic device equipped with a camera module according to an embodiment of the present disclosure.

[0054] Throughout the accompanying drawings and detailed embodiments, the same reference numerals refer to the same elements. For purposes of clarity, illustration, and convenience, the drawings may not be drawn to scale, and the relative dimensions, scale, and depiction of elements in the drawings may be exaggerated. Detailed Implementation

[0055] In the following description, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. It should be noted that the examples are not limited to the same examples.

[0056] The following detailed embodiments are provided to help readers gain a comprehensive understanding of the methods, apparatus, and / or systems described in this application. However, after understanding this disclosure, various changes, modifications, and equivalents of the methods, apparatus, and / or systems described in this application will be apparent. For example, the order of operations described in this application is merely illustrative, and is not limited to the order set forth in this application, except for operations that must occur in a specific order, but can be obviously changed after understanding this disclosure. Furthermore, for clarity and conciseness, descriptions of features well-known in the art may be omitted.

[0057] The features described in this application 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 this disclosure.

[0058] 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. As used herein, a "part" of an element may include the entire element or less than the entire element.

[0059] As used in this application, the term “and / or” includes any one of the associated listed items and any combination of any two or more items; similarly, “...at least one of” includes any one of the associated listed items and any combination of any two or more items.

[0060] Although terms such as “first,” “second,” and “third” may be used in this application to describe various components, parts, regions, layers, or portions, these components, parts, regions, layers, or portions are not limited by these terms. Rather, these terms are used only to distinguish one component, part, region, layer, or portion from another. Therefore, without departing from the teachings of the examples described in this application, the first component, first part, first region, first layer, or first portion mentioned in these examples may also be referred to as a second component, second part, second region, second layer, or second portion.

[0061] Spatial relative terms such as “above,” “above,” “below,” and “below” may be used in this application 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 during use or operation. For example, if the device in the drawings is flipped, an element described as being “above” or “above” another element would be located “below” or “below” that other element. Thus, depending on the spatial orientation of the device, the term “above” covers both “above” and “below” orientations. The device may also be oriented in other ways (rotated 90 degrees or in other orientations), and the spatial relative terms used in this application should be interpreted accordingly.

[0062] 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 the 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.

[0063] The features of the examples described in this application can be combined in various ways that will become apparent upon understanding this disclosure. Furthermore, although the examples described in this application have multiple configurations, other configurations that will become apparent upon understanding this disclosure are also possible.

[0064] Variations in the shapes shown in the accompanying drawings may occur due to manufacturing techniques and / or tolerances. Therefore, the examples described in this application are not limited to the specific shapes shown in the accompanying drawings, but include shape variations that may occur during manufacturing.

[0065] In the lens configuration diagrams below, for illustrative purposes, the thickness, size, and shape of the lenses may be shown in an exaggerated manner, and specifically, the shapes of spherical or aspherical surfaces presented in the lens configuration diagrams are shown by way of example only and are not limited thereto.

[0066] It should be noted that in this application, the term "may" is used relative to "example," such as regarding what an example may include or implement, meaning that there exists at least one example that includes or implements such a feature, but not all examples are limited to this.

[0067] One aspect of this disclosure is to provide an optical imaging system that can be mounted in a portable electronic device having a relatively thin profile, and the optical imaging system can have a relatively long focal length.

[0068] An optical imaging system according to embodiments of the present disclosure may include a plurality of lenses arranged along an optical axis. The plurality of lenses may be spaced apart from each other by a predetermined distance along the optical axis.

[0069] As an example, an optical imaging system may include six or seven lenses.

[0070] In an embodiment that includes six lenses, the first lens refers to the lens closest to the object side (or the reflecting member located on the object side), while the sixth lens refers to the lens closest to the image sensor.

[0071] In an embodiment that includes seven lenses, the first lens refers to the lens closest to the object side (or the reflecting member located on the object side), while the seventh lens refers to the lens closest to the image sensor.

[0072] Furthermore, in each lens, the first surface (or object-side surface) refers to the surface closest to the object, while the second surface (or image-side surface) refers to the surface closest to the imaging plane. In this application, the values ​​for the radius of curvature, thickness, etc., of the lens are expressed in mm, and the unit of angle is degrees.

[0073] Furthermore, in the description of the shape of each lens, a convex shape of a surface indicates that the paraxial region of that surface is convex, while a concave shape of a surface indicates that the paraxial region of that surface is concave. Therefore, even when one surface of a lens is described as having a convex shape, the edge portion of the lens can be concave. Similarly, even when one surface of a lens is described as having a concave shape, the edge portion of the lens can be convex.

[0074] The paraxial region refers to the relatively narrow region that includes the optical axis near the optical axis.

[0075] An optical imaging system according to an embodiment of the present disclosure may include six or seven lenses.

[0076] For example, in an embodiment that includes six lenses, the optical imaging system may include a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens arranged sequentially from the object side.

[0077] In an embodiment that includes seven lenses, the optical imaging system may include a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens arranged sequentially from the object side.

[0078] However, the optical imaging system according to this disclosure may not only consist of 6 or 7 lenses, but may also include other components.

[0079] For example, an optical imaging system may also include a reflective element with a reflective surface that alters the optical path. For instance, the reflective element may be a mirror or a prism.

[0080] The reflecting member can be positioned closer to the object side than multiple lenses. For example, the reflecting member can be positioned closer to the object side than the first lens. Therefore, the lens positioned closest to the object side can be the lens positioned closest to the reflecting member.

[0081] In addition, the optical imaging system may also include an image sensor for converting an image of the incident object into an electrical signal.

[0082] Additionally, the optical imaging system may include an infrared cutoff filter (hereinafter referred to as a filter) for blocking infrared light. The filter is positioned between the image sensor and the lens closest to the image sensor (e.g., a sixth or seventh lens).

[0083] Alternatively, two reflective elements can be provided. In this case, one reflective element can be positioned closer to the object side than the first lens, while the other reflective element can be positioned between the lens and the filter closest to the image sensor.

[0084] All lenses constituting an optical imaging system according to an embodiment of the present disclosure may be formed of plastic material.

[0085] refer to Figure 13 and Figure 14 At least some lenses in an optical imaging system may have non-circular planar shapes. For example, at least one of the first lens L1 and the second lens L2 may be formed with a non-circular shape, while the remaining lenses may be formed with a circular shape. Alternatively, all lenses in an optical imaging system may be formed with non-circular shapes.

[0086] The term "non-circular shape" refers to a lens shape that is not circular in the area outside the gate of a plastic injection-molded lens.

[0087] A non-circular lens may have four side surfaces, and these four side surfaces may be formed to include two pairs of side surfaces, each pair including two side surfaces facing each other. In addition, the side surfaces facing each other may be configured to have corresponding shapes.

[0088] For example, when viewed along the optical axis, the first side surface 21 and the second side surface 22 of the first lens L1 can have an arcuate shape, and the third side surface 23 and the fourth side surface 24 can have a substantially linear shape (see...). Figure 13 The gate, which serves as a path for the movement of the resin material, can be formed on either the first side surface 21 or the second side surface 22.

[0089] The third side surface 23 and the fourth side surface 24 can be connected to the first side surface 21 and the second side surface 22, respectively. In addition, the third side surface 23 and the fourth side surface 24 can be symmetrical about the optical axis and can be formed parallel to each other.

[0090] The term "circular shape" refers to a shape in which the gate of the plastic injection lens has been removed (i.e., a shape in which a portion of the circle has been cut off).

[0091] All lenses in an optical imaging system may include an optical portion 10 and a flange portion 30. Referring below... Figures 13 to 15 Describe one or more examples of non-circular lenses in detail.

[0092] The first lens L1 and the second lens L2 may have non-circular shapes, but are not limited to this, and all lenses may have non-circular shapes.

[0093] For ease of description, only the first lens L1 will be described below.

[0094] The optical section 10 may be the part that exhibits the optical performance of the first lens L1. For example, light reflected from an object may be refracted as it passes through the optical section 10.

[0095] The optical part 10 may have refractive power and may have an aspherical shape.

[0096] Additionally, the optical component 10 may include an object-side surface (the surface facing the object) and an image-side surface (the surface facing the imaging plane). Figure 14 (as shown in the image).

[0097] The flange portion 30 may be the portion that secures the first lens L1 to another configuration (e.g., the lens barrel or the second lens L2).

[0098] The flange portion 30 may extend around at least a portion of the optical portion 10 and may be integrally formed with the optical portion 10.

[0099] The optical portion 10 and the flange portion 30 can be formed to have non-circular shapes. For example, when viewed in the direction of the optical axis, the optical portion 10 and the flange portion 30 can be non-circular (see...). Figure 14 and Figure 15 In contrast, the optical portion 10 can be formed to have a circular shape, while the flange portion 30 can be formed to have a non-circular shape.

[0100] The optical portion 10 may include a first edge 11, a second edge 12, a third edge 13, and a fourth edge 14, wherein the first edge 11 and the second edge 12 may be positioned facing each other, and the third edge 13 and the fourth edge 14 may be positioned facing each other.

[0101] The third edge 13 and the fourth edge 14 can connect to the first edge 11 and the second edge 12, respectively.

[0102] When viewed along the optical axis, the first edge 11 and the second edge 12 can have an arcuate shape, and the third edge 13 and the fourth edge 14 can have a generally linear shape. The third edge 13 and the fourth edge 14 can be formed symmetrically about the optical axis and can be formed parallel to each other.

[0103] The optical part 10 may have a major axis (a) and a minor axis (b). For example, when viewed in the direction of the optical axis, the line segment that connects the third edge 13 and the fourth edge 14 with the shortest distance while passing through the optical axis may be the minor axis (b), while the line segment that connects the first edge 11 and the second edge 12 while passing through the optical axis and perpendicular to the minor axis (b) may be the major axis (a).

[0104] In this case, half of the major axis (a) can be the maximum effective radius, while half of the minor axis (b) can be the minimum effective radius.

[0105] The flange portion 30 may include a first flange portion 31 and a second flange portion 32. The first flange portion 31 may extend from a first edge 11 of the optical portion 10, and the flange portion 32 may extend from a second edge 12 of the optical portion 10.

[0106] The first edge 11 of the optical portion 10 may refer to the portion adjacent to the first flange portion 31, while the second edge 12 of the optical portion 10 may refer to the portion adjacent to the second flange portion 32.

[0107] The third edge 13 of the optical portion 10 may refer to a side surface of the optical portion 10 on which the flange portion 30 is not formed, while the fourth edge 14 of the optical portion 10 may refer to the other side surface of the optical portion 10 on which the flange portion 30 is not formed.

[0108] The first lens L1 can be formed from a plastic material and can be injection molded. In this case, the third edge 13 and the fourth edge 14 of the first lens L1 according to this embodiment can be formed in such a shape during injection molding, rather than by cutting a portion of the lens after injection molding.

[0109] When a portion of the lens is removed after injection molding, the lens may deform due to the forces applied to it. When the lens is deformed, its optical properties change, which can be problematic.

[0110] However, in the first lens L1 according to this embodiment, since the first lens L1 is formed to have a non-circular shape during injection molding, the size of the first lens L1 can be reduced while ensuring the performance of the first lens L1.

[0111] In this embodiment, the effective radius of the non-circular lens can be made larger than the effective radius of other lenses.

[0112] The effective radius refers to the radius through which light actually passes on one of the surfaces of each lens (object side and image side). For example, the effective radius refers to the radius of the optical portion of each lens.

[0113] Since the first lens L1 is non-circular, the effective radius of the first lens L1 can have a maximum effective radius and a minimum effective radius. The maximum effective radius corresponds to half of the virtual straight line connecting the first edge 11 and the second edge 12 when passing through the optical axis, and the minimum effective radius corresponds to half of the virtual straight line connecting the third edge 13 and the fourth edge 14 when passing through the optical axis.

[0114] refer to Figure 15 A first virtual line connecting the optical axis from the junction between the first edge 11 and the fourth edge 14 of the non-circular lens can be defined as P1, and a second virtual line connecting the optical axis from the junction between the second edge 12 and the fourth edge 14 of the non-circular lens can be defined as P2, with the angle between the two virtual lines defined as α. P1 can also be defined as the first virtual line connecting the optical axis from the junction between the first edge 11 and the third edge 13 of the non-circular lens, and P2 can be defined as the second virtual line connecting the optical axis from the junction between the second edge 12 and the third edge 13 of the non-circular lens, such that the angle between the two virtual lines can also be defined as α.

[0115] Each of the multiple lenses may have at least one aspherical surface.

[0116] For example, at least one of the first and second surfaces of each of the first to sixth or seventh lenses may be an aspherical surface. In this case, the aspherical surface of the first to sixth or seventh lens is represented by the following Equation 1.

[0117] Equation 1

[0118]

[0119] In Equation 1, c is the curvature of the lens (the reciprocal of the radius of curvature), K is the conic constant, and Y is the distance from any point on the aspherical surface of the lens to the optical axis. Additionally, constants A through J are aspherical coefficients. Z represents the distance (SAG) from any point on the aspherical surface of the lens to the vertex of the aspherical surface along the optical axis.

[0120] The optical imaging system according to embodiments of this disclosure can satisfy at least one of the following conditional expressions:

[0121] [Conditional Expression 1] 0.7 ≤ L1S1es / L1S1el < 0.95

[0122] [Conditional Expression 2] 0.7 ≤ L1S2es / L1S2el < 0.95

[0123] [Conditional Expression 3] 0.7 ≤ L2S1es / L2S1el < 0.95

[0124] [Conditional Expression 4] 0.7 ≤ L2S2es / L2S2el < 0.95

[0125] [Conditional Expression 5] 0.4mm <DpL1<0.9mm

[0126] [Conditional Expression 6] 17.0mm <PTTL<22.0mm

[0127] [Conditional Expression 7] 0.7 ≤ s1es / s1el < 0.95

[0128] [Conditional expression 8] 0.5 <L1S1el / IMG HT<1.0

[0129] [Conditional expression 9] 0 <L1S1el / PTTL<0.2

[0130] [Conditional expression 10] 0 <L1S1es / PTTL<0.1

[0131] [Conditional Expression 11] 0 <L2S1el / PTTL<0.12

[0132] [Conditional Expression 12] 0 <L2S1es / PTTL<0.1

[0133] [Conditional Expression 13] 0 <AL1 / (PTTL) 2 <0.05

[0134] [Conditional Expression 14] 45° < α < 93°

[0135] [Conditional Expression 15] 1.0 < α / (2 × FOV) < 3.0

[0136] [Conditional expression 16] 0.2 <BFL / (2*IMG HT)<2.0

[0137] [Conditional Expression 17] 2.7 ≤ Fno < 7

[0138] [Conditional Expression 18] 10° <FOV<35°

[0139] L1S1el is the maximum effective radius of the object-side surface of the first lens, L1S1es is the minimum effective radius of the object-side surface of the first lens, L1S2el is the maximum effective radius of the image-side surface of the first lens, and L1S2es is the minimum effective radius of the image-side surface of the first lens.

[0140] L2S1el is the maximum effective radius of the object-side surface of the second lens, L2S1es is the minimum effective radius of the object-side surface of the second lens, L2S2el is the maximum effective radius of the image-side surface of the second lens, and L2S2es is the minimum effective radius of the image-side surface of the second lens.

[0141] DpL1 is the distance along the optical axis between the exit surface of the prism and the object-side surface of the first lens, TTL is the distance along the optical axis from the object-side surface of the first lens to the imaging surface of the image sensor, and PTTL is the distance along the optical axis from the reflecting surface of the prism located on the object-side of the first lens to the imaging surface of the image sensor.

[0142] s1el is the maximum radius of the opening of the spacer between the first lens and the second lens, and s1es is the minimum radius of the opening of the spacer between the first lens and the second lens.

[0143] IMG HT is half the diagonal length of the imaging surface of an image sensor.

[0144] AL1 is the area of ​​the optical portion of the object-side surface of the first lens. In this case, the area refers to the area of ​​the plane observed when viewing the first lens along the optical axis (see...). Figure 14 ).

[0145] α is the angle between the first virtual line P1 and the second virtual line P2. The first virtual line P1 connects the optical axis (Z-axis) from the connection point of the first side surface 21 and the fourth side surface 24 of the first lens, and the second virtual line P2 connects the optical axis (Z-axis) from the connection point of the second side surface 22 and the fourth side surface 24 of the first lens.

[0146] FOV is the field of view of an optical imaging system, and BFL is the distance along the optical axis from the image side of the lens closest to the image sensor to the imaging surface of the image sensor.

[0147] Fno is the F-number of the optical imaging system.

[0148] An optical imaging system according to embodiments of the present disclosure may include multiple lens groups. As an example, the optical imaging system may include a first lens group and a second lens group. The first lens group and the second lens group may each include multiple lenses. The first lens group and the second lens group may be arranged sequentially from the object side toward the image side.

[0149] The first lens group may include a first lens, a second lens, a third lens, and a fourth lens. The first lens may have positive refractive power, and its first and second surfaces may be convex. The second lens may have negative refractive power, its first surface may be concave, and its second surface may be convex. The third lens may have negative refractive power, and its first and second surfaces may be concave. The fourth lens may have negative refractive power, its first surface may be convex, and its second surface may be concave.

[0150] The first lens group as a whole can have positive refractive power.

[0151] The second lens group may include a fifth lens and a sixth lens. The fifth lens may have positive refractive power, with a concave first surface and a convex second surface. The sixth lens may also have positive refractive power, with a concave first surface and a convex second surface.

[0152] The second lens group as a whole can have positive refractive power.

[0153] At least one of the first and second lens groups can be moved to change the overall focal length of the optical imaging system. For example, the optical imaging system has an optical zoom function.

[0154] As another example, an optical imaging system may include a first lens group, a second lens group, and a third lens group. Each of the first to third lens groups may include multiple lenses. The first to third lens groups may be arranged sequentially from the object side toward the image side.

[0155] The first lens group may include a first lens and a second lens.

[0156] The first lens may have positive or negative refractive power. The first lens may have a convex shape on a first surface and a concave shape on a second surface. Alternatively, the first lens may have a shape in which both the first and second surfaces are convex.

[0157] The second lens can have positive or negative refractive power. The second lens can have a convex shape on the first surface and a concave shape on the second surface. Alternatively, the second lens can have a shape in which the first and second surfaces are concave.

[0158] The first lens group as a whole can have either positive or negative refractive power.

[0159] The second lens group may include a third lens, a fourth lens, and a fifth lens.

[0160] The third lens may have positive refractive power. The third lens may have a shape in which the first and second surfaces are convex. Alternatively, the third lens may have a concave shape on the first surface and a convex shape on the second surface.

[0161] The fourth lens may have negative refractive power. The fourth lens may have a concave shape in which the first and second surfaces are recessed. Alternatively, the fourth lens may have a concave shape on the first surface and a convex shape on the second surface.

[0162] The fifth lens can have positive or negative refractive power. In the fifth lens, the first surface can be convex and the second surface can be concave. Alternatively, the fifth lens can have a shape in which the first and second surfaces are convex.

[0163] The second lens group as a whole can have either positive or negative refractive power.

[0164] The third lens group may include the sixth and seventh lenses.

[0165] The sixth lens can have positive or negative refractive power. In the sixth lens, the first surface can be concave and the second surface can be convex.

[0166] The seventh lens can have positive or negative refractive power. In the seventh lens, the first surface can be convex and the second surface can be concave. Alternatively, the seventh lens can have a concave shape in which the first and second surfaces are concave. Alternatively, the seventh lens can have a concave shape on the first surface and a convex shape on the second surface.

[0167] The third lens group as a whole can have either positive or negative refractive power.

[0168] At least one of the first to third lens groups can be moved to change the overall focal length of the optical imaging system. For example, the optical imaging system can have an optical zoom function.

[0169] An optical imaging system according to an embodiment of the present disclosure features a telephoto lens with a relatively narrow field of view and a relatively long focal length.

[0170] Reference Figure 1 and Figure 2 An optical imaging system according to a first embodiment of the present disclosure is described.

[0171] An optical imaging system 100 according to a first embodiment of the present disclosure may include a first lens group G1 and a second lens group G2.

[0172] The first lens group G1 may include a first lens 110, a second lens 120, a third lens 130, and a fourth lens 140, and the second lens group G2 may include a fifth lens 150 and a sixth lens 160. Additionally, the optical imaging system may also include a filter 180 and an image sensor 190.

[0173] Additionally, a reflective member R may be included, which is positioned closer to the object side than the first lens 110 and has a reflective surface that alters the light path. In a first embodiment of this disclosure, the reflective member R may be a prism, but it may also be a mirror.

[0174] Light incident on the reflecting member R can be bent by the reflecting member R to pass through the first lens group G1 and the second lens group G2.

[0175] At least one of the first lens group G1 and the second lens group G2 can be moved to change the total focal length of the optical imaging system. As an example, the second lens group G2 can be moved in the optical axis direction to change the distance between the first lens group G1 and the second lens group G2, as well as the distance between the second lens group G2 and the image sensor 190.

[0176] The lens characteristics (radius of curvature, lens thickness or distance between lenses, refractive index, Abbe number, focal length) of each lens are shown in Table 1 below.

[0177] [Table 1]

[0178]

[0179] [Table 2]

[0180] D1 5.473 0.159 D2 0.036 2.962

[0181] In the optical imaging system according to the first embodiment of this disclosure, IMG HT is 2.6 mm, α is 91.146°, and AL1 is 8.26 mm. 2 .

[0182] With the optical imaging system in its first position, the total focal length f is 17mm, Fno is 5.0, and FOV is 17.3494°.

[0183] With the optical imaging system in the second position, the total focal length f is 13mm, Fno is 3.8, and FOV is 22.1462°.

[0184] In the first embodiment of this disclosure, the first lens group G1 and the second lens group G2 as a whole have positive refractive power. The focal length of the first lens group G1 is 20.01 mm, and the focal length of the second lens group G2 is 14.672 mm.

[0185] The first lens 110 has positive refractive power, and the first and second surfaces of the first lens 110 are convex.

[0186] The second lens 120 has negative refractive power, with its first surface being concave and its second surface being convex.

[0187] The third lens 130 has negative refractive power, and the first and second surfaces of the third lens 130 are concave.

[0188] The fourth lens 140 has negative refractive power, with its first surface being convex and its second surface being concave.

[0189] The fifth lens 150 has positive refractive power, with its first surface being concave and its second surface being convex.

[0190] The sixth lens 160 has positive refractive power, with its first surface being concave and its second surface being convex.

[0191] Each surface of the first lens 110 to the sixth lens 160 has an aspherical surface coefficient as shown in Table 3. For example, the object-side surface and the image-side surface of the first lens 110 to the sixth lens 160 are both aspherical surfaces.

[0192] [Table 3]

[0193] S4 -0.01913 0.00011 0.000636 -0.00096 0.000891 -0.00051 0.000183 -4E-05 4.78E-06 -2.4E-07 S5 -1.95147 0.0151 0.000535 -0.00104 0.000299 -4.6E-05 4.1E-06 -2.1E-07 6.05E-09 -7.2E-11 S6 7.893201 0.00362 0.002846 0.000497 -0.00174 0.001274 -0.00049 0.000107 -1.3E-05 6.38E-07 S7 59 -0.00187 0.006543 0.009797 -0.02221 0.020899 -0.01107 0.003471 -0.00061 4.55E-05 S8 -26.9747 0.018637 0.016369 -0.02068 0.010352 -0.00221 1.51E-05 6.98E-05 -1E-05 4.7E-07 S9 16.32205 0.032358 -0.00442 -0.00688 0.003705 -0.00083 0.000102 -7.1E-06 2.63E-07 -4.1E-09 S10 -59 -0.05083 0.013229 -0.00107 -0.00803 0.008384 -0.00405 0.001018 -0.00013 6.37E-06 S11 -50.3659 0.005102 -0.02546 0.039817 -0.05526 0.058367 -0.0425 0.019868 -0.00538 0.000647 S12 59 -0.0081 -0.00115 0.000252 -1.8E-05 7.37E-07 -1.8E-08 2.64E-10 -2.2E-12 7.85E-15 S13 -38.5124 -0.01302 0.000324 -2.9E-06 7.71E-09 4.34E-11 -4E-13 1.42E-15 -1.4E-17 4.29E-19 S14 -5.32344 0.01534 -0.00741 0.00394 -0.00166 0.000509 -0.00011 1.43E-05 -1.1E-06 3.59E-08 S15 -21.6354 0.000966 0.000214 3.88E-05 -0.00011 6.72E-05 -2E-05 3.01E-06 -2.4E-07 7.55E-09

[0194] Furthermore, the optical system configured as described above can have, for example... Figure 2 The aberration characteristics shown are illustrated.

[0195] Reference Figure 3 and Figure 4 An optical imaging system according to a second embodiment of the present disclosure is described.

[0196] An optical imaging system 200 according to a second embodiment of the present disclosure may include a first lens group G1, a second lens group G2, and a third lens group G3.

[0197] The first lens group G1 may include a first lens 210 and a second lens 220; the second lens group G2 may include a third lens 230, a fourth lens 240, and a fifth lens 250; and the third lens group G3 may include a sixth lens 260 and a seventh lens 270. Additionally, the optical imaging system may also include a filter 280 and an image sensor 290.

[0198] Additionally, a reflective member R may be included, which is positioned closer to the object side than the first lens 210 and has a reflective surface that alters the light path. In a second embodiment of this disclosure, the reflective member R may be a prism, but it may also be a mirror.

[0199] Light incident on the reflecting member R can be bent by the reflecting member R to pass through the first lens group G1 to the third lens group G3.

[0200] At least one of the first lens group G1 to the third lens group G3 can be moved to change the total focal length of the optical imaging system. For example, the second lens group G2 and the third lens group G3 can be moved in the optical axis direction to change the distance between the first lens group G1 and the second lens group G2, the distance between the second lens group G2 and the third lens group G3, and the distance between the third lens group G3 and the image sensor 290.

[0201] The lens characteristics (radius of curvature, lens thickness or distance between lenses, refractive index, Abbe number, focal length) of each lens are shown in Table 4 below.

[0202] [Table 4]

[0203]

[0204]

[0205] [Table 5]

[0206] D1 0.752 3.998 D2 0.500 1.253 D3 4.193 0.262

[0207] In the optical imaging system according to the second embodiment of this disclosure, IMG HT is 2.35 mm, α is 91.146°, and AL1 is 5.74 mm. 2 .

[0208] With the optical imaging system in its first position, the total focal length f is 15mm, Fno is 6.8, and FOV is 17.8844°.

[0209] With the optical imaging system in the second position, the total focal length f is 8mm, Fno is 4.4, and FOV is 32.2886°.

[0210] In the second embodiment of this disclosure, the first lens group G1 as a whole has negative refractive power, the second lens group G2 as a whole has positive refractive power, and the third lens group G3 as a whole has negative refractive power. The focal length of the first lens group G1 is -16.914 mm, the focal length of the second lens group G2 is 4.288 mm, and the focal length of the third lens group G3 is -5.758 mm.

[0211] The first lens 210 has negative refractive power, the first surface of the first lens 210 is convex, and the second surface of the first lens 210 is concave.

[0212] The second lens 220 has negative refractive power, with its first surface being convex and its second surface being concave.

[0213] The third lens 230 has positive refractive power, and the first and second surfaces of the third lens 230 are convex.

[0214] The fourth lens 240 has negative refractive power, and the first and second surfaces of the fourth lens 240 are concave.

[0215] The fifth lens 250 has positive refractive power, and the first and second surfaces of the fifth lens 250 are convex.

[0216] The sixth lens 260 has positive refractive power, with its first surface being concave and its second surface being convex.

[0217] The seventh lens 270 has negative refractive power, and the first and second surfaces of the seventh lens 270 are concave.

[0218] Each surface of the first lens 210 to the seventh lens 270 has an aspherical surface coefficient as shown in Table 6. For example, the object-side surface and the image-side surface of the first lens 210 to the seventh lens 270 are both aspherical surfaces.

[0219] [Table 6]

[0220] S4 -13.1642 0.015309 -0.0054 0.002052 -0.00067 0.000153 -2.2E-05 1.5E-06 S5 0 0.043495 -0.06762 0.068699 -0.04376 0.016992 -0.00368 0.000339 S6 0 0.016368 -0.06684 0.071071 -0.04915 0.021045 -0.00513 0.000535 S7 0 -0.02931 -0.01066 0.00841 -0.00604 0.00291 -0.00093 0.000127 S8 0 -0.00829 0.01206 -0.01669 0.012819 -0.00602 0.001512 -0.00016 S9 0 -0.01149 -0.00509 0.016507 -0.01336 0.00534 -0.00122 0.00012 S10 0 0.03457 -0.01738 0.027885 -0.02673 0.016974 -0.00579 0.000754 S11 -16.1606 0.040728 0.006588 0.027873 -0.06244 0.053333 -0.01911 0.002337 S12 0 -0.01171 -0.00187 0.028796 -0.04628 0.032284 -0.0104 0.001257 S13 0 0.01756 -0.05605 0.078565 -0.06545 0.031906 -0.00889 0.001138 S14 0 0.055106 -0.06528 0.115503 -0.12469 0.073798 -0.02294 0.002887 S15 0 0.026847 -0.04368 0.166733 -0.20533 0.118527 -0.033 0.003535 S16 0 0.026847 -0.04368 0.166733 -0.20533 0.118527 -0.033 0.003535 S17 0 -0.03108 -0.03014 0.15812 -0.20478 0.123317 -0.03558 0.003958

[0221] Furthermore, the optical system configured as described above can have, for example... Figure 4 The aberration characteristics shown are illustrated.

[0222] Reference Figure 5 and Figure 6 An optical imaging system according to a third embodiment of the present disclosure is described.

[0223] An optical imaging system 300 according to a third embodiment of the present disclosure may include a first lens group G1, a second lens group G2, and a third lens group G3.

[0224] The first lens group G1 may include a first lens 310 and a second lens 320; the second lens group G2 may include a third lens 330, a fourth lens 340, and a fifth lens 350; and the third lens group G3 may include a sixth lens 360 and a seventh lens 370. Additionally, the optical imaging system may also include a filter 380 and an image sensor 390.

[0225] Additionally, a reflective member R may be included, which is positioned closer to the object side than the first lens 310 and has a reflective surface that alters the light path. In a third embodiment of this disclosure, the reflective member R may be a prism, but it may also be a mirror.

[0226] Light incident on the reflecting member R can be bent by the reflecting member R to pass through the first lens group G1 to the third lens group G3.

[0227] At least one of the first lens group G1 to the third lens group G3 can be moved to change the total focal length of the optical imaging system. For example, the second lens group G2 can be moved in the optical axis direction to change the distance between the first lens group G1 and the second lens group G2, as well as the distance between the second lens group G2 and the third lens group G3.

[0228] The lens characteristics (radius of curvature, lens thickness or distance between lenses, refractive index, Abbe number, focal length) of each lens are shown in Table 7 below.

[0229] [Table 7]

[0230]

[0231] [Table 8]

[0232]

[0233]

[0234] In the optical imaging system according to the third embodiment of this disclosure, IMG HT is 2.6 mm, α is 91.146°, and AL1 is 14.09 mm. 2 .

[0235] With the optical imaging system in its first position, the total focal length f is 17mm, Fno is 3.8, and FOV is 16.8908°.

[0236] With the optical imaging system in the second position, the total focal length f is 13mm, Fno is 2.8, and FOV is 22.1034°.

[0237] In the third embodiment of this disclosure, the first lens group G1 as a whole has positive refractive power, the second lens group G2 as a whole has negative refractive power, and the third lens group G3 as a whole has positive refractive power. The focal length of the first lens group G1 is 6.674 mm, the focal length of the second lens group G2 is -3.773 mm, and the focal length of the third lens group G3 is 11.247 mm.

[0238] The first lens 310 has positive refractive power, and the first and second surfaces of the first lens 310 are convex.

[0239] The second lens 320 has negative refractive power, and the first and second surfaces of the second lens 320 are concave.

[0240] The third lens 330 has positive refractive power, with its first surface being concave and its second surface being convex.

[0241] The fourth lens 340 has negative refractive power, and the first and second surfaces of the fourth lens 340 are concave.

[0242] The fifth lens 350 has negative refractive power, the first surface of the fifth lens 350 is convex, and the second surface of the fifth lens 350 is concave.

[0243] The sixth lens 360 has positive refractive power, with its first surface being concave and its second surface being convex.

[0244] The seventh lens 370 has positive refractive power, with its first surface being concave and its second surface being convex.

[0245] Each surface of the first lens 310 to the seventh lens 370 has an aspherical surface coefficient as shown in Table 9. For example, the object-side surface and the image-side surface of the first lens 310 to the seventh lens 370 are both aspherical surfaces.

[0246] [Table 9]

[0247]

[0248] Furthermore, the optical system configured as described above can have, for example... Figure 6 The aberration characteristics shown are illustrated.

[0249] Reference Figure 7 and Figure 8 An optical imaging system according to a fourth embodiment of the present disclosure is described.

[0250] An optical imaging system 400 according to a fourth embodiment of the present disclosure may include a first lens group G1, a second lens group G2, and a third lens group G3.

[0251] The first lens group G1 may include a first lens 410 and a second lens 420; the second lens group G2 may include a third lens 430, a fourth lens 440, and a fifth lens 450; and the third lens group G3 may include a sixth lens 460 and a seventh lens 470. Additionally, the optical imaging system may also include a filter 480 and an image sensor 490.

[0252] Additionally, a reflective member R may be included, which is positioned closer to the object side than the first lens 410 and has a reflective surface that alters the light path. In a fourth embodiment of this disclosure, the reflective member R may be a prism, but it may also be a mirror.

[0253] Light incident on the reflecting member R can be bent by the reflecting member R to pass through the first lens group G1 to the third lens group G3.

[0254] At least one of the first lens group G1 to the third lens group G3 can be moved to change the total focal length of the optical imaging system. For example, the second lens group G2 and the third lens group G3 can be moved in the optical axis direction to change the distance between the first lens group G1 and the second lens group G2, the distance between the second lens group G2 and the third lens group G3, and the distance between the third lens group G3 and the image sensor 490.

[0255] The lens characteristics (radius of curvature, lens thickness or distance between lenses, refractive index, Abbe number, focal length) of each lens are shown in Table 10 below.

[0256] [Table 10]

[0257]

[0258] [Table 11]

[0259] D1 0.300 2.983 D2 0.514 1.831 D3 4.221 0.224

[0260] In the optical imaging system according to the fourth embodiment of this disclosure, IMG HT is 2.35 mm, α is 91.146°, and AL1 is 10.20 mm. 2 .

[0261] With the optical imaging system in its first position, the total focal length f is 14mm, Fno is 4.1, and FOV is 18.7995°.

[0262] With the optical imaging system in the second position, the total focal length f is 8mm, Fno is 2.8, and FOV is 31.979°.

[0263] In the fourth embodiment of this disclosure, the first lens group G1 as a whole has negative refractive power, the second lens group G2 as a whole has positive refractive power, and the third lens group G3 as a whole has negative refractive power. The focal length of the first lens group G1 is -21.406 mm, the focal length of the second lens group G2 is 4.38 mm, and the focal length of the third lens group G3 is -6.749 mm.

[0264] The first lens 410 has negative refractive power, the first surface of the first lens 410 is convex, and the second surface of the first lens 410 is concave.

[0265] The second lens 420 has negative refractive power, with its first surface being convex and its second surface being concave.

[0266] The third lens 430 has positive refractive power, and the first and second surfaces of the third lens 430 are convex.

[0267] The fourth lens 440 has negative refractive power, and the first and second surfaces of the fourth lens 440 are concave.

[0268] The fifth lens 450 has positive refractive power, the first surface of the fifth lens 450 is convex, and the second surface of the fifth lens 450 is concave.

[0269] The sixth lens 460 has positive refractive power, with its first surface being concave and its second surface being convex.

[0270] The seventh lens 470 has negative refractive power, and the first and second surfaces of the seventh lens 470 are concave.

[0271] Each surface of the first lens 410 to the seventh lens 470 has an aspherical surface coefficient as shown in Table 12. For example, the object-side surface and the image-side surface of the first lens 410 to the seventh lens 470 are both aspherical surfaces.

[0272] [Table 12]

[0273]

[0274]

[0275] Furthermore, the optical system configured as described above can have, for example... Figure 8 The aberration characteristics shown are illustrated.

[0276] Reference Figure 9 and Figure 10 An optical imaging system according to a fifth embodiment of the present disclosure is described.

[0277] An optical imaging system 500 according to a fifth embodiment of the present disclosure may include a first lens group G1, a second lens group G2, and a third lens group G3.

[0278] The first lens group G1 may include a first lens 510 and a second lens 520; the second lens group G2 may include a third lens 530, a fourth lens 540, and a fifth lens 550; and the third lens group G3 may include a sixth lens 560 and a seventh lens 570. Additionally, the optical imaging system may also include a filter 580 and an image sensor 590.

[0279] Additionally, a first reflecting member R1 may be included, which is positioned closer to the object side than the first lens 510 and has a reflecting surface that alters the light path. Furthermore, a second reflecting member R2 may be included, which is disposed between the seventh lens 570 and the filter 580 and also has a reflecting surface that alters the light path. In the fifth embodiment of this disclosure, the first reflecting member R1 and the second reflecting member R2 may be prisms, but they may also be mirrors.

[0280] Light incident on the first reflecting member R1 can be bent by the first reflecting member R1 to pass through the first lens group G1 to the third lens group G3.

[0281] Light passing through the first lens group G1 to the third lens group G3 can be bent by the second reflective member R2 and can be received by the image sensor 590.

[0282] At least one of the first lens group G1 to the third lens group G3 can be moved to change the total focal length of the optical imaging system. For example, the second lens group G2 and the third lens group G3 can be moved in the optical axis direction to change the distance between the first lens group G1 and the second lens group G2, the distance between the second lens group G2 and the third lens group G3, and the distance between the third lens group G3 and the image sensor 590.

[0283] The lens characteristics (radius of curvature, lens thickness or distance between lenses, refractive index, Abbe number, focal length) of each lens are shown in Table 13 below.

[0284] [Table 13]

[0285]

[0286] [Table 14]

[0287] D1 0.300 2.613 D2 0.500 1.436 D3 3.551 0.303

[0288] In the optical imaging system according to the fifth embodiment of this disclosure, IMG HT is 2.35 mm, α is 91.146°, and AL1 is 13.49 mm.2 .

[0289] With the optical imaging system in its first position, the total focal length f is 12mm, Fno is 3.5, and FOV is 22.2637°.

[0290] With the optical imaging system in the second position, the total focal length f is 8mm, Fno is 2.7, and FOV is 33.5974°.

[0291] In the fifth embodiment of this disclosure, the first lens group G1 as a whole has negative refractive power, the second lens group G2 as a whole has positive refractive power, and the third lens group G3 as a whole has negative refractive power. The focal length of the first lens group G1 is -12.612 mm, the focal length of the second lens group G2 is 4.699 mm, and the focal length of the third lens group G3 is -17.138 mm.

[0292] The first lens 510 has negative refractive power, the first surface of the first lens 510 is convex, and the second surface of the first lens 510 is concave.

[0293] The second lens 520 has positive refractive power, with a first surface that is convex and a second surface that is concave.

[0294] The third lens 530 has positive refractive power, and the first and second surfaces of the third lens 530 are convex.

[0295] The fourth lens 540 has negative refractive power, with its first surface being concave and its second surface being convex.

[0296] The fifth lens 550 has positive refractive power, the first surface of the fifth lens 550 is convex, and the second surface of the fifth lens 550 is concave.

[0297] The sixth lens 560 has negative refractive power, with its first surface being concave and its second surface being convex.

[0298] The seventh lens 570 has negative refractive power, the first surface of the seventh lens 570 is convex, and the second surface of the seventh lens 570 is concave.

[0299] Each surface of the first lens 510 to the seventh lens 570 has an aspherical surface coefficient as shown in Table 15. For example, the object-side surface and the image-side surface of the first lens 510 to the seventh lens 570 are both aspherical surfaces.

[0300] [Table 15]

[0301] S4 -17.9977 0.027159 -0.0145 0.005213 -0.00156 0.000314 -3.6E-05 1.74E-06 S5 0 0.049966 -0.05673 0.038932 -0.01798 0.004927 -0.00073 4.47E-05 S6 0 0.00256 -0.04055 0.033021 -0.01575 0.004307 -0.00063 3.77E-05 S7 0 -0.03447 -0.01042 0.012891 -0.00728 0.002249 -0.00036 2.39E-05 S8 0 -0.00251 -0.00291 0.000761 -0.00031 9.19E-06 4.36E-06 3.1E-08 S9 0 -0.01127 0.020274 -0.01806 0.007894 -0.00193 0.000254 -1.4E-05 S10 0 0.003661 0.041516 -0.03589 0.016148 -0.00423 0.000632 -4.2E-05 S11 59 0.023262 0.002418 0.025252 -0.03869 0.024516 -0.00742 0.000883 S12 0 -0.00077 -0.03118 0.058709 -0.05834 0.032313 -0.00927 0.001077 S13 0 -0.01301 -0.00944 0.010157 -0.00511 0.001469 -0.00021 1.19E-05 S14 0 0.08096 -0.04523 0.037781 -0.02462 0.010403 -0.00248 0.000254 S15 0 0.025727 -0.00473 0.014385 -0.01641 0.008604 -0.00224 0.000235 S16 0 -0.08726 0.016987 0.008606 -0.01605 0.008996 -0.00237 0.000247 S17 0 -0.08255 0.021095 -0.00464 -0.00069 0.000861 -0.00024 2.31E-05

[0302] Furthermore, the optical system configured as described above can have, for example... Figure 10 The aberration characteristics shown are illustrated.

[0303] Reference Figure 11 and Figure 12 An optical imaging system according to a sixth embodiment of the present disclosure is described.

[0304] An optical imaging system 600 according to a sixth embodiment of the present disclosure may include a first lens group G1, a second lens group G2, and a third lens group G3.

[0305] The first lens group G1 may include a first lens 610 and a second lens 620; the second lens group G2 may include a third lens 630, a fourth lens 640, and a fifth lens 650; and the third lens group G3 may include a sixth lens 660 and a seventh lens 670. Additionally, the optical imaging system may also include a filter 680 and an image sensor 690.

[0306] Additionally, a first reflecting member R1 may be included, which is positioned closer to the object side than the first lens 610 and has a reflecting surface that alters the light path. Furthermore, a second reflecting member R2 may be included, which is disposed between the seventh lens 670 and the filter 680 and also has a reflecting surface that alters the light path. In the sixth embodiment of this disclosure, the first reflecting member R1 and the second reflecting member R2 may be prisms, but they may also be mirrors.

[0307] Light incident on the first reflecting member R1 can be bent by the first reflecting member R1 to pass through the first lens group G1 to the third lens group G3.

[0308] Light passing through the first lens group G1 to the third lens group G3 can be bent by the second reflective member R2 and can be received by the image sensor 690.

[0309] At least one of the first lens group G1 to the third lens group G3 can be moved to change the total focal length of the optical imaging system. For example, the second lens group G2 and the third lens group G3 can be moved in the optical axis direction to change the distance between the first lens group G1 and the second lens group G2, the distance between the second lens group G2 and the third lens group G3, and the distance between the third lens group G3 and the image sensor 690.

[0310] The lens characteristics (radius of curvature, lens thickness or distance between lenses, refractive index, Abbe number, focal length) of each lens are shown in Table 16 below.

[0311] [Table 16]

[0312]

[0313]

[0314] [Table 17]

[0315] D1 0.300 4.453 D2 2.738 1.278 D3 1.324 1.316

[0316] In the optical imaging system according to the sixth embodiment of this disclosure, IMG HT is 2.35 mm, α is 46.308°, and AL1 is 9.9 mm. 2 .

[0317] With the optical imaging system in its first position, the total focal length f is 13mm, Fno is 5.2, and FOV is 19.945°.

[0318] With the optical imaging system in the second position, the total focal length f is 8mm, Fno is 4.3, and FOV is 33.6085°.

[0319] In the sixth embodiment of this disclosure, the first lens group G1 as a whole has negative refractive power, the second lens group G2 as a whole has positive refractive power, and the third lens group G3 as a whole has negative refractive power. The focal length of the first lens group G1 is -12.246 mm, the focal length of the second lens group G2 is 5.012 mm, and the focal length of the third lens group G3 is -13.584 mm.

[0320] The first lens 610 has negative refractive power, the first surface of the first lens 610 is convex, and the second surface of the first lens 610 is concave.

[0321] The second lens 620 has positive refractive power, with a first surface that is convex and a second surface that is concave.

[0322] The third lens 630 has positive refractive power, and the first and second surfaces of the third lens 630 are convex.

[0323] The fourth lens 640 has negative refractive power, and the first and second surfaces of the fourth lens 640 are concave.

[0324] The fifth lens 650 has positive refractive power, and the first and second surfaces of the fifth lens 650 are convex.

[0325] The sixth lens 660 has positive refractive power, with its first surface being concave and its second surface being convex.

[0326] The seventh lens 670 has negative refractive power, with its first surface being convex and its second surface being concave.

[0327] Each surface of the first lens 610 to the seventh lens 670 has an aspherical surface coefficient as shown in Table 18. For example, the object-side surface and the image-side surface of the first lens 610 to the seventh lens 670 are both aspherical surfaces.

[0328] [Table 18]

[0329] S4 -11.2652 0.035636 -0.02183 0.009777 -0.00344 0.000773 -9.5E-05 4.84E-06 S5 0 0.06072 -0.07326 0.05641 -0.0288 0.008658 -0.00139 8.98E-05 S6 0 0.004113 -0.04742 0.044158 -0.02407 0.007517 -0.00125 8.32E-05 S7 0 -0.03071 -0.01414 0.019282 -0.01336 0.005137 -0.00104 8.55E-05 S8 0 -0.00484 0.002826 -0.0057 0.003917 -0.00184 0.000449 -4.5E-05 S9 0 -0.02432 0.061975 -0.08052 0.059707 -0.02688 0.00685 -0.00076 S10 0 -0.00159 0.074411 -0.08733 0.055892 -0.02226 0.005775 -0.0008 S11 56.3414 0.039952 -0.04317 0.112763 -0.12331 0.068094 -0.01839 0.001836 S12 0 0.008598 -0.07318 0.139136 -0.13618 0.0746 -0.02232 0.002925 S13 0 -0.00817 -0.00721 0.009626 -0.0079 0.003297 -0.00063 4.38E-05 S14 0 0.081456 -0.07941 0.100564 -0.0864 0.045268 -0.01287 0.001507 S15 0 0.028242 -0.01479 0.028678 -0.02874 0.014982 -0.00402 0.000443 S16 0 -0.11006 0.070426 -0.05347 0.030882 -0.01279 0.003019 -0.00028 S17 0 -0.07111 0.023889 -0.00706 -0.00055 0.001358 -0.00048 5.95E-05

[0330] Furthermore, the optical system configured as described above can have, for example... Figure 12 The aberration characteristics shown are illustrated.

[0331] Figure 13 This is a schematic perspective view of an optical imaging system according to an embodiment of the present disclosure.

[0332] refer to Figure 13 An optical imaging system according to an embodiment of the present disclosure may include a plurality of lenses L1, L2, L3, L4 and L5 and a spacer S1.

[0333] Although not shown in the accompanying drawings, the optical imaging system may also include a reflective element positioned closer to the object side than the plurality of lenses. Additionally, it may include a filter and an image sensor.

[0334] For example, the optical imaging system can be any one of the optical imaging systems according to the first to sixth embodiments described above.

[0335] Multiple lenses L1, L2, L3, L4 and L5 can be arranged to be spaced apart from adjacent lenses.

[0336] At least some of lenses L1, L2, L3, L4, and L5 may have a non-circular planar shape. For example, the first lens L1 and the second lens L2 may be formed to have a non-circular shape, while the third lens L3 through the fifth lens L5 may be formed to have a circular shape. Alternatively, all of the lenses may be formed to have a non-circular shape.

[0337] Figure 16 This is a plan view of the first spacer ring of an optical imaging system according to an embodiment of the present disclosure.

[0338] refer to Figure 16 Spacers can be placed between adjacent lenses.

[0339] Spacers maintain the distance between lenses and block unwanted light. For example, spacers can have a light-absorbing layer to block unwanted light. The light-absorbing layer can be a black film or black iron oxide.

[0340] The spacers may include a first spacer S1, a second spacer, a third spacer, and a fourth spacer arranged from the object side toward the image side.

[0341] The first spacer S1 can be disposed between lenses with non-circular shapes. For example, the first spacer S1 can be disposed between the first lens L1 and the second lens L2.

[0342] The second spacer can be positioned between the second lens L2 and the third lens L3, the third spacer can be positioned between the third lens L3 and the fourth lens L4, and the fourth spacer can be positioned between the fourth lens L4 and the fifth lens L5. For reference, in Figure 13 and Figure 16 Only the first spacer S1 is shown in the diagram.

[0343] The first spacer S1 may have an opening 60 through which light passes. The opening 60 may be formed by the inner peripheral surface 40 of the first spacer S1. For example, the space surrounded by the inner peripheral surface 40 of the first spacer S1 may be used as the opening 60.

[0344] When viewed along the optical axis, the outer peripheral surface 50 of the first spacer S1 can be non-circular, and the inner peripheral surface 40 of the first spacer S1 can also be non-circular when viewed along the optical axis.

[0345] The outer peripheral surface 50 of the first spacer S1 can correspond to the shape of the first lens L1 and the second lens L2. For example, the outer peripheral surface 50 of the first spacer S1 may include a first outer surface 51, a second outer surface 52, a third outer surface 53 and a fourth outer surface 54.

[0346] The first outer surface 51 and the second outer surface 52 may have relative shapes facing each other, and the third outer surface 53 and the fourth outer surface 54 may have relative shapes facing each other.

[0347] When viewed along the optical axis, the first outer surface 51 and the second outer surface 52 may have an arcuate shape, while the third outer surface 53 and the fourth outer surface 54 may have a substantially linear shape.

[0348] The third outer surface 53 and the fourth outer surface 54 can be connected to the first outer surface 51 and the second outer surface 52, respectively.

[0349] In addition, the third outer surface 53 and the fourth outer surface 54 can be symmetrical about the optical axis and can be formed parallel to each other.

[0350] The inner circumferential surface 40 of the first spacer S1 may include a first inner surface 41, a second inner surface 42, a third inner surface 43, and a fourth inner surface 44.

[0351] The first inner surface 41 and the second inner surface 42 can face each other and have corresponding shapes, and the third inner surface 43 and the fourth inner surface 44 can face each other and have corresponding shapes.

[0352] When viewed along the optical axis, the first inner surface 41 and the second inner surface 42 may have an arcuate shape, while the third inner surface 43 and the fourth inner surface 44 may have a substantially linear shape.

[0353] The third inner surface 43 and the fourth inner surface 44 can be connected to the first inner surface 41 and the second inner surface 42, respectively.

[0354] In addition, the third inner surface 43 and the fourth inner surface 44 can be symmetrical about the optical axis and can be formed parallel to each other.

[0355] The inner circumferential surface 50 of the first spacer S1 may have a major axis (c) and a minor axis (d). For example, when viewed in the direction of the optical axis, the line segment that connects the third inner surface 43 and the fourth inner surface 44 with the shortest distance while passing through the optical axis may be the minor axis (d), while the line segment that connects the first inner surface 41 and the second inner surface 42 while passing through the optical axis and perpendicular to the minor axis (d) may be the major axis (c).

[0356] In this case, half of the major axis (c) can be the maximum radius of the opening 60, while half of the minor axis (d) can be the minimum radius of the opening 60.

[0357] Figures 17 to 20 This is a rear view of a portable electronic device equipped with a camera module according to various embodiments of the present disclosure.

[0358] Figures 17 to 20 The portable electronic device 1 shown can be a portable electronic device, such as a mobile communication terminal equipped with multiple camera modules, a smartphone, or a tablet PC.

[0359] Each of the multiple camera modules may include an optical imaging system.

[0360] exist Figures 17 to 20 In this process, camera module 2 may include any one of the optical imaging systems according to the first to sixth embodiments described above.

[0361] Camera module 2 can bend the direction of light propagation through reflective components.

[0362] The optical axis of the camera module 2 can be oriented in a direction perpendicular to the thickness direction of the portable electronic device 1 (Z-axis direction, i.e., from the front surface of the portable electronic device toward the rear surface of the portable electronic device, and vice versa).

[0363] For example, the optical axis of the camera module 2 can be formed in the width direction (Y direction) or length direction (X direction) of the portable electronic device 1.

[0364] Therefore, even when the camera module 2 has the characteristics of a telephoto camera with a relatively long focal length, the thickness of the portable electronic device 1 can be prevented from increasing. Thus, the thickness of the portable electronic device 1 can be minimized.

[0365] refer to Figure 17 A first camera module 2 and a second camera module 3 can be provided in the portable electronic device 1. For example, the portable electronic device 1 may include a dual-camera module.

[0366] The optical axes of the first camera module 2 and the second camera module 3 can be formed in different directions. For example, the optical axis of the first camera module 2 can be formed in the X direction, and the optical axis of the second camera module 3 can be formed in the Z direction.

[0367] In addition, the first camera module 2 and the second camera module 3 can be configured to have different fields of view and focal lengths.

[0368] The first camera module 2 can be configured to have a relatively narrow field of view and a relatively long focal length (e.g., telephoto), and the second camera module 3 can be configured to have a relatively wide field of view and a relatively short focal length (e.g., wide-angle).

[0369] As an example, the field of view of the first camera module 2 can be less than 30°. For instance, the field of view of the first camera module 2 can be in the range of 10° to 30°. The field of view of the second camera module 3 can be in the range of 75° to 85°.

[0370] The first camera module 2 can be configured such that Fno satisfies 2.8 ≤ Fno < 5. The second camera module 3 can be configured such that Fno satisfies 1.4 ≤ Fno ≤ 2.4.

[0371] The field of view and focal length of the two camera modules can be designed differently to capture images of objects at different depths.

[0372] refer to Figure 18 A first camera module 2, a second camera module 3, and a third camera module 4 can be provided in the portable electronic device 1. For example, the portable electronic device 1 may include a three-camera module. The first camera module 2 to the third camera module 4 can be arranged in the width direction (Y direction) or the length direction (X direction) of the portable electronic device 1.

[0373] The optical axis of the first camera module 2 can be formed in a direction different from the optical axis of the second camera module 3 and the third camera module 4. For example, the optical axis of the first camera module 2 can be formed in the X direction, and the optical axes of the second camera module 3 and the third camera module 4 can be formed in the Z direction.

[0374] In addition, the first camera module 2 to the third camera module 4 can be configured to have different field of view and focal length.

[0375] The first camera module 2 can be configured to have the narrowest field of view and the longest focal length (e.g., telephoto), and the third camera module 4 can be configured to have the widest field of view and the shortest focal length (e.g., ultra-wide-angle). The second camera module 3 can have a wider field of view than the first camera module 2 and a narrower field of view than the third camera module 4 (e.g., wide-angle).

[0376] As an example, the field of view of the first camera module 2 can be less than 30°. For example, the field of view of the first camera module 2 can be in the range of 10° to 30°. The field of view of the second camera module 3 can be in the range of 75° to 85°. The field of view of the third camera module 4 can be in the range of 110° to 150°.

[0377] The first camera module 2 can be configured such that Fno satisfies 2.8 ≤ Fno < 5. The second camera module 3 can be configured such that Fno satisfies 1.4 ≤ Fno ≤ 2.4. The third camera module 4 can be configured such that Fno satisfies 2.0 ≤ Fno ≤ 2.4.

[0378] The field of view and focal length of the three camera modules can be designed differently to capture images of objects at different depths.

[0379] refer to Figure 19 A first camera module 2, a second camera module 3, a third camera module 4, and a fourth camera module 5 can be disposed in a portable electronic device 1. For example, the portable electronic device 1 may include a four-camera module. The second camera module 3 to the fourth camera module 5 can be arranged in the width direction (Y direction) or the length direction (X direction) of the portable electronic device 1, and the first camera module 2 can be arranged adjacent to the second camera module 3 to the fourth camera module 5. Therefore, the first camera module 2, the second camera module 3, the third camera module 4, and the fourth camera module 5 can be arranged as a whole in a quadrilateral shape.

[0380] The optical axis of the first camera module 2 can be formed in a direction different from the optical axis of the second camera module 3 to the fourth camera module 5. For example, the optical axis of the first camera module 2 can be formed in the X direction, and the optical axes of the second camera module 3 to the fourth camera module 5 can be formed in the Z direction.

[0381] In addition, the first camera module 2 to the fourth camera module 5 can be configured to have different field of view and focal length.

[0382] The first camera module 2 can be configured to have the narrowest field of view and the longest focal length (e.g., super telephoto), and the fourth camera module 5 can be configured to have the widest field of view and the shortest focal length (e.g., ultra-wide-angle). The second camera module 3 can have a wider field of view than the first camera module 2 and a narrower field of view than the third camera module 4 (e.g., telephoto). The third camera module 4 can have a wider field of view than the second camera module 3 and a narrower field of view than the fourth camera module 5 (e.g., wide-angle).

[0383] As an example, the field of view of the first camera module 2 can be less than 30°. For instance, the field of view of the first camera module 2 can be in the range of 10° to 30°. The field of view of the second camera module 3 can be in the range of 40° to 45°. The field of view of the third camera module 4 can be in the range of 75° to 85°. The field of view of the fourth camera module 5 can be in the range of 110° to 150°.

[0384] The first camera module 2 can be configured such that Fno satisfies 2.8 ≤ Fno < 5. The second camera module 3 can be configured such that Fno satisfies 1.8 ≤ Fno ≤ 2.4. The third camera module 4 can be configured such that Fno satisfies 1.4 ≤ Fno ≤ 2.4. The fourth camera module 5 can be configured such that Fno satisfies 2.0 ≤ Fno ≤ 2.4.

[0385] The field of view and focal length of the four camera modules can be designed differently to capture images of objects at different depths.

[0386] Figure 20 The implementation shown can be compared with Figure 18 The implementation shown is the same, but it may differ in the arrangement of the first camera module 2, the second camera module 3, and the third camera module 4.

[0387] refer to Figure 20 The second camera module 3 and the third camera module 4 can be arranged on both sides of the first camera module 2. The second camera module 3 and the third camera module 4 can be arranged in the width direction (Y direction) or length direction (X direction) of the portable electronic device 1.

[0388] The first camera module 2, the second camera module 3, and the third camera module 4 can be arranged as a whole in a triangle.

[0389] The optical imaging system according to embodiments of the present disclosure can be mounted on a portable electronic device with a relatively small thickness and can have a relatively long focal length.

[0390] While specific examples have been shown and described above, it will be apparent upon understanding this disclosure that various changes in form and detail may be made to these examples without departing from the spirit and scope of the claims and their equivalents. The examples described herein are to be understood in a descriptive sense only and not for limiting purposes. The description of features or aspects in each example should be considered applicable to similar features or aspects in other examples. Suitable results may still be achieved if the described techniques are performed in a different order, and / or if components in the described system, architecture, device, or circuit are combined in different ways and / or replaced or supplemented by other components or their equivalents. Therefore, the scope of this disclosure is not limited by the specific embodiments but by the claims and their equivalents, and all variations within the scope of the claims and their equivalents should be understood to be included in this disclosure.

Claims

1. An optical imaging system, comprising: The first lens group includes a first lens and a second lens, and has negative refractive power; The second lens group includes a third lens, a fourth lens, and a fifth lens, and has positive refractive power; as well as The third lens group includes the sixth and seventh lenses and has negative refractive power. The first lens group to the third lens group are arranged sequentially from the object side. In this embodiment, at least one of the first lens group to the third lens group is moved along the optical axis to change the distance between the first lens group and the third lens group. The first lens has a convex object-side surface. The second lens has a concave image-side surface. The third lens has a convex object-side surface and a convex image-side surface. The fifth lens has a concave image-side surface. The fourth lens has negative refractive power. Wherein, of the two axes of the first lens that intersect the optical axis and are perpendicular to each other, the length of one axis is greater than the length of the other axis, and Wherein, 0.7 ≤ L1S1es / L1S1el < 0.95, where L1S1el is the maximum effective radius of the object side surface of the first lens, and L1S1es is the minimum effective radius of the object side surface of the first lens.

2. The optical imaging system according to claim 1, wherein, The sixth lens has a concave object-side surface.

3. The optical imaging system according to claim 2, wherein, The seventh lens has a concave image-side surface.

4. The optical imaging system according to claim 1, wherein, Satisfying 0.2 < BFL / (2) IMG HT) < 2.0, where BFL is the distance from the image side of the seventh lens to the imaging surface on the optical axis, and IMG HT is half the diagonal length of the imaging surface.

5. The optical imaging system according to claim 1, wherein, The following conditions must be met: 10° < FOV < 35°, where FOV is the field of view of the optical imaging system.

6. The optical imaging system according to claim 1, wherein, It satisfies 2.7 ≤ Fno < 7, where Fno is the F-number of the optical imaging system.

7. The optical imaging system according to claim 1, further comprising a first reflective member disposed before the first lens group, in, The first reflective member has a reflective surface that changes the path of light incident on the first reflective member toward the first lens group.

8. The optical imaging system according to claim 7, wherein, The first reflecting component is a prism, and Wherein, 0.4 mm < DpL1 < 0.9 mm is satisfied, where DpL1 is the distance between the exit surface of the prism and the first lens.

9. The optical imaging system according to claim 8, wherein, The condition 17.0 mm < PTTL < 22.0 mm is satisfied, where PTTL is the distance along the optical axis from the reflecting surface of the prism to the imaging surface.

10. The optical imaging system according to claim 1, wherein, The third lens group consists of the sixth lens and the seventh lens. The sixth lens has positive refractive power, and The seventh lens has negative refractive power.

11. The optical imaging system according to claim 10, wherein, The sixth lens has a concave object-side surface and a convex image-side surface.

12. The optical imaging system according to claim 11, wherein, The seventh lens has a convex object-side surface and a concave image-side surface.

13. The optical imaging system according to claim 9, wherein, Of the two axes of the first lens that intersect the optical axis and are perpendicular to each other, the length of one axis is greater than the length of the other axis. Wherein, 0 < L1S1el / PTTL < 0.2, where L1S1el is the maximum effective radius of the object side surface of the first lens.

14. The optical imaging system according to claim 9, wherein, The first lens includes an optical portion and a flange portion extending around at least a portion of the optical portion. Wherein, 0 < AL1 / (PTTL)2 < 0.09, where AL1 is the area of ​​the optical portion on the object side of the first lens.

15. The optical imaging system according to claim 1, wherein, The first lens includes an optical portion and a flange portion extending around at least a portion of the optical portion. The optical portion includes a first edge, a second edge disposed on the opposite side of the first edge relative to the optical axis, and a third edge and a fourth edge connecting the first edge and the second edge, respectively. The third edge is disposed on the side opposite to the fourth edge relative to the optical axis. Wherein, the shortest distance between the first edge and the second edge is greater than the shortest distance between the third edge and the fourth edge.

16. The optical imaging system according to claim 15, wherein, The following conditions must be met: 45° < α < 93°, where α is the angle between the first dashed line connecting the optical axis from the junction of the first edge and the fourth edge and the second dashed line connecting the optical axis from the junction of the second edge and the fourth edge.

17. The optical imaging system according to claim 15, wherein, Satisfying 1.0 < α / (2) FOV) < 3.0, where FOV is the viewing angle of the optical imaging system, and α is the angle between a first dashed line connecting the optical axis from the junction of the first edge and the fourth edge and a second dashed line connecting the optical axis from the junction of the second edge and the fourth edge.

18. The optical imaging system according to claim 1, wherein, The third lens has positive refractive power.

Images