Optical imaging system and portable electronic device

Abstract

The present application relates to an optical imaging system and a portable electronic device, the optical imaging system comprising, in order from the object side, 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 the following conditional expressions: -2.0 < L3R2 / f < -0.5, 3.0 < f / IMG_HT < 4.0, and 0.4 < BFL / 2IMG_HT < 0.6, wherein the first lens has positive refractive power, a convex object side face, and a concave image side face, the second lens has negative refractive power, a convex object side face, and a concave image side face, the third lens has positive refractive power, a convex object side face, and a convex image side face, the fourth lens has negative refractive power and a concave image side face, the fifth lens has positive refractive power and a convex object side face, the sixth lens has positive refractive power, a concave object side face, and a convex image side face, and the seventh lens has negative refractive power, a concave object side face, and a concave image side face.

Description

[0001] Cross-references to related applications

[0002] This application claims priority to Korean Patent Application No. 10-2019-0107269, 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 application relates to an optical imaging system configured with a folded optical path. Background Technology

[0004] In a scalable imaging system where multiple lenses are arranged in a row, the total length of the optical imaging system increases with the number of lenses. For example, miniaturizing an optical imaging system with five lenses is more difficult than miniaturizing one with three lenses. Therefore, there are limitations to installing scalable optical imaging systems in portable terminals with a small thickness. Summary of the Invention

[0005] 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.

[0006] An optical imaging system that can be installed in a thin, small-sized terminal while having a long focal length.

[0007] In one general aspect, the optical imaging system includes: a first lens group comprising a first lens having positive refractive power and a second lens having negative refractive power; a second lens group comprising a third lens having positive refractive power, a fourth lens having negative refractive power, and a fifth lens having positive refractive power; and a third lens group comprising a sixth lens having positive refractive power and a seventh lens having negative refractive power. The first lens group, the second lens group, and the third lens group are arranged sequentially from the object side of the optical imaging system toward the imaging plane.

[0008] The first lens group as a whole can have negative refractive power.

[0009] The second lens group as a whole can have positive refractive power.

[0010] The third lens group as a whole can have negative refractive power.

[0011] The first lens may have a convex object side and a concave image side.

[0012] The second lens can have a convex object side and a concave image side.

[0013] The third lens may have a convex object-side surface and a convex image-side surface.

[0014] The fourth lens may have a concave object-side surface and a concave image-side surface.

[0015] The fifth lens may have a convex object-side surface.

[0016] The sixth lens may have a concave object-side surface and a convex image-side surface.

[0017] The seventh lens may have a concave object-side surface and a concave image-side surface.

[0018] The optical imaging system may satisfy -20<fG1<-13, where fG1 is the focal length of the first lens group.

[0019] The optical imaging system may satisfy 5.0<fG2<10, where fG2 is the focal length of the second lens group.

[0020] The optical imaging system may satisfy -24<fG3<-16, where fG3 is the focal length of the third lens group.

[0021] In another general aspect, an optical imaging system includes: a first lens group including a plurality of lenses and having negative refractive power as a whole; a second lens group including a plurality of lenses and having positive refractive power as a whole; and a third lens group including a plurality of lenses and having negative refractive power as a whole. The first lens group, the second lens group and the third lens group are sequentially arranged from the object side of the optical imaging system toward the imaging surface.

[0022] In a first position of the optical imaging system, the distance between the first lens group and the second lens group may be greater than the distance between the third lens group and the imaging surface, and the distance between the second lens group and the third lens group may be greater than the distance between the third lens group and the imaging surface.

[0023] In a second position of the optical imaging system, the distance between the first lens group and the second lens group may be less than the distance between the second lens group and the third lens group, and the distance between the second lens group and the third lens group may be less than the distance between the third lens group and the imaging surface.

[0024] Other features and aspects will become apparent from the following detailed description, the accompanying drawings, and the appended claims. Brief Description of Drawings

[0025] Figure 1 illustrates the configuration of an optical imaging system according to a first example.

[0026] Figure 2 illustrates Figure 1The aberration curves of the optical imaging system at the first zoom position are shown.

[0027] Figure 3 It shows in Figure 1 The aberration curves of the optical imaging system at the second zoom position are shown.

[0028] Figure 4 The configuration of the optical imaging system according to the second example is shown.

[0029] Figure 5 It shows in Figure 4 The aberration curves of the optical imaging system at the first zoom position are shown.

[0030] Figure 6 It shows in Figure 4 The aberration curves of the optical imaging system at the second zoom position are shown.

[0031] Figure 7 The configuration of the optical imaging system according to the third example is shown.

[0032] Figure 8 It shows in Figure 7 The aberration curves of the optical imaging system at the first zoom position are shown.

[0033] Figure 9 It shows in Figure 7 The aberration curves of the optical imaging system at the second zoom position are shown.

[0034] Figure 10 The configuration of the optical imaging system according to the fourth example is shown.

[0035] Figure 11 It shows in Figure 10 The aberration curves of the optical imaging system at the first zoom position are shown.

[0036] Figure 12 It shows in Figure 10 The aberration curves of the optical imaging system at the second zoom position are shown.

[0037] Figure 13 The configuration of the optical imaging system according to the fifth example is shown.

[0038] Figure 14 It shows in Figure 13 The aberration curves of the optical imaging system at the first zoom position are shown.

[0039] Figure 15 It shows in Figure 13 The aberration curves of the optical imaging system at the second zoom position are shown.

[0040] Figure 16 The configuration of the optical imaging system according to the sixth example is shown.

[0041] Figure 17 It shows in Figure 16 The aberration curves of the optical imaging system at the first zoom position are shown.

[0042] Figure 18 It shows in Figure 16 The aberration curves of the optical imaging system at the second zoom position are shown.

[0043] Figure 19 The configuration of the optical imaging system according to the seventh example is shown.

[0044] Figure 20 It shows in Figure 19 The aberration curves of the optical imaging system at the first zoom position are shown.

[0045] Figure 21 It shows in Figure 19 The aberration curves of the optical imaging system at the second zoom position are shown.

[0046] Figure 22 It is a plan view of the first lens disposed in the optical imaging system according to the present disclosure.

[0047] Figure 23 It is set in Figure 1 A plan view of the spacing maintenance member between the first lens and the second lens of the optical imaging system shown.

[0048] Figure 24 , Figure 25 , Figure 26 and Figure 27 This is a rear view of a portable terminal equipped with the optical imaging system according to this disclosure.

[0049] Throughout the accompanying drawings and detailed embodiments, the same reference numerals refer to the same elements. For purposes of clarity, illustration, and convenience, the drawings may not be drawn to scale, and the relative dimensions, scale, and depiction of elements in the drawings may be exaggerated. Detailed Implementation

[0050] The following detailed embodiments are provided to help readers gain a comprehensive understanding of the methods, apparatus, and / or systems described in this application. However, various changes, modifications, and equivalents to the methods, apparatus, and / or systems described in this application will be apparent to those skilled in the art. 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, and can be changed, as will be apparent to those skilled in the art. Furthermore, for clarity and brevity, descriptions of functions and structures well-known to those skilled in the art may be omitted.

[0051] 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 so that this disclosure will be thorough and complete, and will fully convey the scope of this disclosure to those skilled in the art.

[0052] It should be noted that in this application, the term "may" is used in relation to examples or implementations, such as with regard to what an example or implementation may include or implement, meaning that there exists at least one example or implementation that includes or implements such features, and that all examples and implementations are not limited thereto.

[0053] 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.

[0054] 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.

[0055] 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.

[0056] 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 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 in this application should be interpreted accordingly.

[0057] 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.

[0058] Due to manufacturing techniques and / or tolerances, variations in the shapes shown in the accompanying drawings may occur. 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.

[0059] The features of the examples described in this application can be combined in various ways that will become apparent after understanding the disclosure of this application. Furthermore, although the examples described in this application have multiple configurations, other configurations that will become apparent after understanding the disclosure of this application are also possible.

[0060] In the example, the first lens refers to the lens closest to the object, and the seventh lens refers to the lens closest to the imaging plane (or image sensor). In the example, the radius of curvature, thickness, distance from the object-side surface of the first lens to the imaging plane (TTL), half the diagonal length of the imaging plane (IMG HT), and focal length are all expressed in millimeters (mm). The lens thickness, the spacing between lenses, and TTL refer to the distance intercepted along the optical axis. Furthermore, in the description of the lens shape, a configuration where one surface is convex indicates that the paraxial region of that surface is convex, while a configuration where one surface is concave indicates that the paraxial region of that surface is concave. Therefore, even when one surface of a lens is described as convex, the edge of the lens can be concave. Similarly, even when one surface of a lens is described as concave, the edge of the lens can be convex.

[0061] An optical imaging system includes an optical system having multiple lenses. For example, the optical system of an optical imaging system may include lenses with refractive power. However, an optical imaging system is not limited to including only lenses with refractive power. For example, an optical imaging system may include a prism for refracting incident light and an aperture for controlling the amount of light. Additionally, an optical imaging system may include an infrared cutoff filter for blocking infrared light. An optical imaging system may also include an image sensor (e.g., an imaging device) for converting an image of an object incident on the image sensor through the optical system into an electrical signal. An optical imaging system may also include a spacing maintenance member for adjusting the spacing between the lenses.

[0062] The lens is formed of a material having a refractive index different from that of air. For example, the lens is formed of plastic or glass. At least one of the lenses has an aspherical shape. The aspherical surface of each lens is represented by Equation 1:

[0063]

[0064] In Equation 1, c represents the reciprocal of the radius of curvature of the corresponding lens, k represents the conic constant, r represents the distance from a point on the aspherical surface of the lens to the optical axis, A to J represent the aspherical constants, and Z (or SAG) represents the distance from a point on the aspherical surface to the vertex of the aspherical surface in the direction of the optical axis.

[0065] An optical imaging system includes multiple lens groups. For example, an optical imaging system may include a first lens group, a second lens group, and a third lens group. The first lens group, the second lens group, and the third lens group are arranged sequentially on the optical axis.

[0066] The first lens group comprises multiple lenses. For example, the first lens group may include multiple lenses with refractive powers having opposite signs of each other. As an example, the first lens group includes lenses with negative refractive powers and lenses with positive refractive powers. The first lens group as a whole may have negative refractive power.

[0067] The second lens group comprises multiple lenses. For example, the second lens group may include three lenses. The three lenses may be arranged to have a refractive power with a sign opposite to that of the adjacent lenses. For example, the second lens group may include a lens with positive refractive power, a lens with negative refractive power, and a lens with positive refractive power. The second lens group as a whole has positive refractive power.

[0068] The third lens group comprises multiple lenses. For example, the third lens group may include multiple lenses with refractive powers having opposite signs of each other. As an example, the third lens group includes lenses with positive refractive powers and lenses with negative refractive powers. The third lens group as a whole has negative refractive power.

[0069] The first to third lens groups can be moved along the optical axis. For example, at least one of the first to third lens groups can be moved to change the focal length of the optical imaging system, and at least two of the first to third lens groups can be moved to adjust the focus of the optical imaging system. Therefore, the optical imaging system can significantly change the zoom ratio. Furthermore, since multiple lens groups of the optical imaging system operate to adjust the focus, the focus can be precisely and accurately adjusted in any zoom state, and the displacement width of the lens groups used for focus adjustment can be significantly reduced.

[0070] Optical imaging systems include lenses made of plastic. For example, in a group of seven or more lenses, at least one lens may be made of plastic.

[0071] Optical imaging systems include aspherical lenses. For example, in a lens group of seven or more lenses, at least one lens may be an aspherical lens.

[0072] Optical imaging systems include components configured to fold or refract light paths. For example, an optical imaging system may include a prism. The prism is disposed on the object side of a first lens group. Prisms are typically formed of materials with low Abbe numbers. For example, prisms can be selected from materials each having an Abbe number of 25 or less.

[0073] Optical imaging systems include filters, apertures, and image sensors.

[0074] A filter is positioned between the third lens group and the image sensor. The filter can block a portion of the wavelength from the incident light to improve the resolution of the optical imaging system. For example, the filter can block the infrared wavelength of the incident light. An aperture stop is positioned between the first and second lens groups.

[0075] An optical imaging system can satisfy one or more of the following conditional expressions.

[0076] Conditional expression: -2.0 <L3R2 / f<-0.5

[0077] Conditional expression: -1.0 < (L3R1 + L3R2) / (L3R1 - L3R2) < -0.1

[0078] Conditional expression: -1.5 <L6R2 / f<-0.4

[0079] Conditional expression: 1.0 < (L6R1 + L6R2) / (L6R1 - L6R2) < 5.0

[0080] Conditional expression: 0.1 <f / f1<0.8

[0081] Conditional expression: 1.0 <f / f3<3.0

[0082] Conditional expression: -2.0 <f / f4<-0.5

[0083] Conditional expression: 0.2 <f / f5<2.0

[0084] Conditional expression: 0.11 <Nd6-Nd7<0.13

[0085] In the above conditional expressions, L3R1 represents the radius of curvature of the object-side surface of the third lens, L3R2 represents the radius of curvature of the image-side surface of the third lens, L6R1 represents the radius of curvature of the object-side surface of the sixth lens, and L6R2 represents the radius of curvature of the image-side surface of the sixth lens, f represents the focal length of the optical imaging system, f1 represents the focal length of the first lens, f3 represents the focal length of the third lens, f4 represents the focal length of the fourth lens, and f5 represents the focal length of the fifth lens, Nd6 represents the refractive index of the sixth lens, and Nd7 represents the refractive index of the seventh lens.

[0086] In addition, the optical imaging system can also satisfy one or more of the following conditional expressions.

[0087] Conditional expression: 0.70 ≤ L1S1es / L1S1el < 1.0

[0088] Conditional expression: 0.70 ≤ L1S2es / L1S2el < 1.0

[0089] Conditional expression: 0.70 ≤ L2S1es / L2S1el < 1.0

[0090] Conditional expression: 0.70 ≤ L2S2es / L2S2el < 1.0

[0091] Conditional expression: 1.4mm <DPL1<2.4mm

[0092] Conditional expression: 26mm <PTTL<34mm

[0093] Conditional expression: 0.7 ≤ SPY² / SPX² < 1.0

[0094] Conditional expression: 0.7 <L1S1el / IMG_HT<0.9

[0095] Conditional expression: 0.08 <L1S1el / PTTL<0.10

[0096] Conditional expression: 0.06 <L1S1es / PTTL<0.08

[0097] Conditional expression: 0.06 <L2S1el / PTTL<0.09

[0098] Conditional expression: 0.04 <L2S1es / PTTL<0.07

[0099] Conditional expression: 0.01 <AL1 / (PTTL) 2 <0.03

[0100] Conditional expression: 80° < 2θ < 92°

[0101] Conditional expression: 0.4 <BFL / 2IMG_HT<0.6

[0102] Conditional expression: -20mm <fG1<-13mm

[0103] Conditional expression: 5.0mm <fG2<10mm

[0104] Conditional expression: -24mm <fG3<-16mm

[0105] In the above conditional expressions, L1S1es represents the effective radius of the minor axis of the object-side surface of the first lens, L1S1el represents the effective radius of the major axis of the object-side surface of the first lens, L1S2es represents the effective radius of the minor axis of the image-side surface of the first lens, and L1S2el represents the effective radius of the major axis of the image-side surface of the first lens; L2S1es represents the effective radius of the minor axis of the object-side surface of the second lens, L2S1el represents the effective radius of the major axis of the object-side surface of the second lens, and L2S2es represents the effective radius of the minor axis of the image-side surface of the second lens, and L2S2el represents the effective radius of the major axis of the image-side surface of the second lens; DPL1 represents the distance from the image-side surface of the prism to the object-side surface of the first lens; PTTL represents the distance from the reflection point of the prism... The distance from the image plane to the imaging plane, SPY2 represents the length of the hole formed in the spacer member in the short axis direction, SPX2 represents the length of the hole formed in the spacer member in the long axis direction, AL1 represents the area of ​​the effective portion of the first lens (object side) projected onto the imaging plane, the effective portion being used to refract incident light reflected from the object in the optical path, 2θ represents the angle formed by the center of the optical axis of the lens and the two ends of the side surface of the lens formed as a straight line, FOV represents the total viewing angle of the optical imaging system, BFL represents the distance from the image side of the lens closest to the imaging plane to the imaging plane, fG1 represents the focal length of the first lens group, fG2 represents the focal length of the second lens group, and fG3 represents the focal length of the third lens group.

[0106] The following sections will describe optical imaging systems based on various examples.

[0107] Reference Figure 1 Describe the optical imaging system according to the first example.

[0108] The optical imaging system 100 may include a prism P, a first lens 110, a second lens 120, a third lens 130, a fourth lens 140, a fifth lens 150, a sixth lens 160, and a seventh lens 170, and may be divided into multiple lens groups. For example, the optical imaging system 100 may be divided into a first lens group G1, a second lens group G2, and a third lens group G3. The first lens group G1 includes two lenses. For example, the first lens group G1 includes a first lens 110 and a second lens 120. The first lens 110 has positive refractive power and a shape in which the object side is convex and the image side is concave. The second lens 120 has negative refractive power and a shape in which the object side is convex and the image side is concave. The second lens group G2 includes three lenses. For example, the second lens group G2 includes a third lens 130, a fourth lens 140, and a fifth lens 150. The third lens 130 has positive refractive power and a shape in which the object side is convex and the image side is convex. The fourth lens 140 has negative refractive power and a shape in which the object side is concave and the image side is concave. The fifth lens 150 has positive refractive power and a shape in which the object side is convex and the image side is convex. The third lens group G3 includes two lenses. For example, the third lens group G3 includes a sixth lens 160 and a seventh lens 170. The sixth lens 160 has positive refractive power and a shape in which the object side is concave and the image side is convex. The seventh lens 170 has negative refractive power and a shape in which the object side is concave and the image side is concave.

[0109] Lens groups G1, G2, and G3 are moved along the optical axis to change the focal length of the optical imaging system. For example, as the focal length of the optical imaging system increases, the distance D1 between the first lens group G1 and the second lens group G2, and the distance D2 between the second lens group G2 and the third lens group G3, can decrease. Simultaneously, as the focal length of the optical imaging system increases, the distance D3 between the third lens group G3 and the imaging plane can increase.

[0110] Furthermore, lens groups G1, G2, and G3 move along the optical axis to change the focal length of the optical imaging system. For example, at least one of the first lens group G1, the second lens group G2, and the third lens group G3 can move along the second optical axis C2. Additionally, the first lens group G1, the second lens group G2, and the third lens group G3 move along the second optical axis C2 by different dimensions to significantly reduce the amount of displacement required for focus adjustment. Figure 2 and Figure 3 As shown, the optical imaging system configured above exhibits aberration characteristics at different zoom positions.

[0111] The optical imaging system 100 includes a prism P, an aperture ST, a filter 180, and an image sensor 190.

[0112] The optical imaging system includes a prism P as a mechanism for folding or bending the optical path. Prism P folds light incident on a first optical axis C1 along a second optical axis C2. The second optical axis C2, folded by prism P, can be approximately perpendicular to the first optical axis C1. Prism P is disposed on the object side of the first lens 110. As described above, prism P refracts light reflected from the object to the image sensor 190.

[0113] A filter 180 is positioned in front of the image sensor 190 to block infrared radiation and other light included in the incident light. The image sensor 190 includes multiple optical sensors. The image sensor 190 configured as described above is configured to convert optical signals into electrical signals.

[0114] Table 1 shows the lens characteristics of the optical imaging system according to this example, Table 2 shows the aspherical values ​​of the optical imaging system according to this example, and Table 3 shows the distance values ​​between the lens groups depending on the first and second positions of the optical imaging system.

[0115] Table 1

[0116]

[0117] (In Table 1, surfaces marked with * are aspherical surfaces)

[0118] Table 2

[0119]

[0120]

[0121] Table 3

[0122] D1 4.98204 1.20000 D2 4.22285 4.80000 D3 3.00000 6.20000

[0123] Reference Figure 4 Describe the optical imaging system according to the second example.

[0124] The optical imaging system 200 may include a prism P, a first lens 210, a second lens 220, a third lens 230, a fourth lens 240, a fifth lens 250, a sixth lens 260, and a seventh lens 270, and may be divided into multiple lens groups. For example, the optical imaging system 200 may be divided into a first lens group G1, a second lens group G2, and a third lens group G3. The first lens group G1 includes two lenses. For example, the first lens group G1 includes a first lens 210 and a second lens 220. The first lens 210 has positive refractive power and a shape in which the object side is convex and the image side is concave. The second lens 220 has negative refractive power and a shape in which the object side is convex and the image side is concave. The second lens group G2 includes three lenses. For example, the second lens group G2 includes a third lens 230, a fourth lens 240, and a fifth lens 250. The third lens 230 has positive refractive power and a shape in which the object side is convex and the image side is convex. The fourth lens 240 has negative refractive power and a shape in which the object side is concave and the image side is concave. The fifth lens 250 has positive refractive power and a shape in which the object side is convex and the image side is convex. The third lens group G3 includes two lenses. For example, the third lens group G3 includes a sixth lens 260 and a seventh lens 270. The sixth lens 260 has positive refractive power and a shape in which the object side is concave and the image side is convex. The seventh lens 270 has negative refractive power and a shape in which the object side is concave and the image side is concave.

[0125] Lens groups G1, G2, and G3 are moved along the optical axis to change the focal length of the optical imaging system. For example, as the focal length of the optical imaging system increases, the distance D1 between the first lens group G1 and the second lens group G2, and the distance D2 between the second lens group G2 and the third lens group G3, can decrease. Simultaneously, as the focal length of the optical imaging system increases, the distance D3 between the third lens group G3 and the imaging plane can increase.

[0126] Furthermore, lens groups G1, G2, and G3 move along the optical axis to change the focal length of the optical imaging system. For example, at least one of the first lens group G1, the second lens group G2, and the third lens group G3 can move along the second optical axis C2. Additionally, the first lens group G1, the second lens group G2, and the third lens group G3 move along the second optical axis C2 by different dimensions to significantly reduce the amount of displacement required for focus adjustment. Figure 5 and Figure 6 As shown, the optical imaging system configured above exhibits aberration characteristics at different zoom positions.

[0127] The optical imaging system 200 includes a prism P, an aperture ST, a filter 280, and an image sensor 290.

[0128] The optical imaging system includes a prism P as a mechanism for folding or bending the optical path. Prism P folds light incident on a first optical axis C1 along a second optical axis C2. The second optical axis C2, folded by prism P, can be approximately perpendicular to the first optical axis C1. Prism P is disposed on the object side of the first lens 210. As described above, prism P refracts light reflected from the object to the image sensor 290.

[0129] A filter 280 is positioned in front of the image sensor 290 to block infrared radiation and other light included in the incident light. The image sensor 290 includes multiple optical sensors. The image sensor 290 configured as described above is designed to convert optical signals into electrical signals.

[0130] Table 4 shows the lens characteristics of the optical imaging system according to this example, Table 5 shows the aspherical values ​​of the optical imaging system according to this example, and Table 6 shows the distance values ​​between the lens groups depending on the first and second positions of the optical imaging system.

[0131] Table 4

[0132]

[0133]

[0134] (In Table 4, surfaces marked with * are aspherical surfaces)

[0135] Table 5

[0136]

[0137] Table 6

[0138] D1 4.96087 1.20000 D2 4.1752 / 4.7311 4.80000 D3 3.00000 6.20000

[0139] Reference Figure 7 Describe the optical imaging system according to the third example.

[0140] The optical imaging system 300 may include a prism P, a first lens 310, a second lens 320, a third lens 330, a fourth lens 340, a fifth lens 350, a sixth lens 360, and a seventh lens 370, and may be divided into multiple lens groups. For example, the optical imaging system 300 may be divided into a first lens group G1, a second lens group G2, and a third lens group G3. The first lens group G1 includes two lenses. For example, the first lens group G1 includes a first lens 310 and a second lens 320. The first lens 310 has positive refractive power and a shape in which the object side is convex and the image side is concave. The second lens 320 has negative refractive power and a shape in which the object side is convex and the image side is concave. The second lens group G2 includes three lenses. For example, the second lens group G2 includes a third lens 330, a fourth lens 340, and a fifth lens 350. The third lens 330 has positive refractive power and a shape in which the object side is convex and the image side is convex. The fourth lens 340 has negative refractive power and a shape in which the object side convexes and the image side is concave. The fifth lens 350 has positive refractive power and a shape in which the object side convexes and the image side is concave. The third lens group G3 includes two lenses. For example, the third lens group G3 includes a sixth lens 360 and a seventh lens 370. The sixth lens 360 has positive refractive power and a shape in which the object side is concave and the image side convex. The seventh lens 370 has negative refractive power and a shape in which the object side is concave and the image side is concave.

[0141] Lens groups G1, G2, and G3 are moved along the optical axis to change the focal length of the optical imaging system. For example, as the focal length of the optical imaging system increases, the distance D1 between the first lens group G1 and the second lens group G2, and the distance D2 between the second lens group G2 and the third lens group G3, can decrease. Simultaneously, as the focal length of the optical imaging system increases, the distance D3 between the third lens group G3 and the imaging plane can increase.

[0142] Furthermore, lens groups G1, G2, and G3 move along the optical axis to change the focal length of the optical imaging system. For example, at least one of the first lens group G1, the second lens group G2, and the third lens group G3 can move along the second optical axis C2. Additionally, the first lens group G1, the second lens group G2, and the third lens group G3 move along the second optical axis C2 by different dimensions to significantly reduce the amount of displacement required for focus adjustment. Figure 8 and Figure 9 As shown, the optical imaging system configured above exhibits aberration characteristics at different zoom positions.

[0143] The optical imaging system 300 includes a prism P, an aperture ST, a filter 380, and an image sensor 390.

[0144] The optical imaging system includes a prism P as a mechanism for folding or bending the optical path. Prism P folds light incident on a first optical axis C1 along a second optical axis C2. The second optical axis C2, folded by prism P, can be approximately perpendicular to the first optical axis C1. Prism P is disposed on the object side of the first lens 310. As described above, prism P refracts light reflected from the object to the image sensor 390.

[0145] A filter 380 is positioned in front of the image sensor 390 to block infrared radiation and other light included in the incident light. The image sensor 390 includes multiple optical sensors. The image sensor 390 configured as described above is designed to convert optical signals into electrical signals.

[0146] Table 7 shows the lens characteristics of the optical imaging system according to this example, Table 8 shows the aspherical values ​​of the optical imaging system according to this example, and Table 9 shows the distance values ​​between the lens groups depending on the first and second positions of the optical imaging system.

[0147] Table 7

[0148]

[0149]

[0150] (In Table 7, surfaces marked with * are aspherical surfaces)

[0151] Table 8

[0152]

[0153] Table 9

[0154] D1 4.47370 1.09560 D2 3.82730 4.27924 D3 2.73900 5.66060

[0155] Reference Figure 10 Describe the optical imaging system according to the fourth example.

[0156] The optical imaging system 400 may include a prism P, a first lens 410, a second lens 420, a third lens 430, a fourth lens 440, a fifth lens 450, a sixth lens 460, and a seventh lens 470, and may be divided into multiple lens groups. For example, the optical imaging system 400 may be divided into a first lens group G1, a second lens group G2, and a third lens group G3. The first lens group G1 includes two lenses. For example, the first lens group G1 includes a first lens 410 and a second lens 420. The first lens 410 has positive refractive power and a shape in which the object side is convex and the image side is concave. The second lens 420 has negative refractive power and a shape in which the object side is convex and the image side is concave. The second lens group G2 includes three lenses. For example, the second lens group G2 includes a third lens 430, a fourth lens 440, and a fifth lens 450. The third lens 430 has positive refractive power and a shape in which the object side is convex and the image side is convex. The fourth lens 440 has negative refractive power and a shape in which the object side is concave and the image side is concave. The fifth lens 450 has positive refractive power and a shape in which the object side is convex and the image side is convex. The third lens group G3 includes two lenses. For example, the third lens group G3 includes a sixth lens 460 and a seventh lens 470. The sixth lens 460 has positive refractive power and a shape in which the object side is concave and the image side is convex. The seventh lens 470 has negative refractive power and a shape in which the object side is concave and the image side is concave.

[0157] Lens groups G1, G2, and G3 are moved along the optical axis to change the focal length of the optical imaging system. For example, as the focal length of the optical imaging system increases, the distance D1 between the first lens group G1 and the second lens group G2, and the distance D2 between the second lens group G2 and the third lens group G3, can decrease. Simultaneously, as the focal length of the optical imaging system increases, the distance D3 between the third lens group G3 and the imaging plane can increase.

[0158] Furthermore, lens groups G1, G2, and G3 move along the optical axis to change the focal length of the optical imaging system. For example, at least one of the first lens group G1, the second lens group G2, and the third lens group G3 can move along the second optical axis C2. Additionally, the first lens group G1, the second lens group G2, and the third lens group G3 move along the second optical axis C2 by different dimensions to significantly reduce the amount of displacement required for focus adjustment. Figure 11 and Figure 12 As shown, the optical imaging system configured above exhibits aberration characteristics at different zoom positions.

[0159] The optical imaging system 400 includes a prism P, an aperture ST, a filter 480, and an image sensor 490.

[0160] The optical imaging system includes a prism P as a mechanism for folding or bending the optical path. Prism P folds light incident on the first optical axis C1 along the direction of the second optical axis C2. The second optical axis C2, folded by prism P, can be approximately perpendicular to the first optical axis C1. Prism P is disposed on the object side of the first lens 410. As described above, prism P refracts light reflected from the object to the image sensor 490.

[0161] A filter 480 is positioned in front of the image sensor 490 to block infrared radiation and other light included in the incident light. The image sensor 490 includes multiple optical sensors. The image sensor 490 configured as described above is designed to convert optical signals into electrical signals.

[0162] Table 10 shows the lens characteristics of the optical imaging system according to this example, Table 11 shows the aspherical values ​​of the optical imaging system according to this example, and Table 12 shows the distance values ​​between the lens groups depending on the first and second positions of the optical imaging system.

[0163] Table 10

[0164]

[0165] (In Table 10, surfaces marked with * are aspherical surfaces)

[0166] Table 11

[0167]

[0168]

[0169] Table 12

[0170] D1 4.48000 1.09500 D2 3.07531 3.50723 D3 2.72000 5.67000

[0171] Reference Figure 13 Describe the optical imaging system according to the fifth example.

[0172] Optical imaging system 500 may include a prism P, a first lens 510, a second lens 520, a third lens 530, a fourth lens 540, a fifth lens 550, a sixth lens 560, and a seventh lens 570, and may be divided into multiple lens groups. For example, optical imaging system 500 may be divided into a first lens group G1, a second lens group G2, and a third lens group G3. First lens group G1 includes two lenses. For example, first lens group G1 includes a first lens 510 and a second lens 520. The first lens 510 has positive refractive power and a shape in which the object side is convex and the image side is concave. The second lens 520 has negative refractive power and a shape in which the object side is convex and the image side is concave. Second lens group G2 includes three lenses. For example, second lens group G2 includes a third lens 530, a fourth lens 540, and a fifth lens 550. The third lens 530 has positive refractive power and a shape in which the object side is convex and the image side is convex. The fourth lens 540 has negative refractive power and a shape in which the object side is concave and the image side is concave. The fifth lens 550 has positive refractive power and a shape in which the object side is convex and the image side is convex. The third lens group G3 includes two lenses. For example, the third lens group G3 includes a sixth lens 560 and a seventh lens 570. The sixth lens 560 has positive refractive power and a shape in which the object side is concave and the image side is convex. The seventh lens 570 has negative refractive power and a shape in which the object side is concave and the image side is concave.

[0173] Lens groups G1, G2, and G3 are moved along the optical axis to change the focal length of the optical imaging system. For example, as the focal length of the optical imaging system increases, the distance D1 between the first lens group G1 and the second lens group G2, and the distance D2 between the second lens group G2 and the third lens group G3, can decrease. Simultaneously, as the focal length of the optical imaging system increases, the distance D3 between the third lens group G3 and the imaging plane can increase.

[0174] Furthermore, lens groups G1, G2, and G3 move along the optical axis to change the focal length of the optical imaging system. For example, at least one of the first lens group G1, the second lens group G2, and the third lens group G3 can move along the second optical axis C2. Additionally, the first lens group G1, the second lens group G2, and the third lens group G3 move along the second optical axis C2 by different dimensions to significantly reduce the amount of displacement required for focus adjustment. Figure 14 and Figure 15 As shown, the optical imaging system configured above exhibits aberration characteristics at different zoom positions.

[0175] The optical imaging system 500 includes a prism P, an aperture ST, a filter 580, and an image sensor 590.

[0176] The optical imaging system includes a prism P as a mechanism for folding or bending the optical path. Prism P folds light incident on the first optical axis C1 along the direction of the second optical axis C2. The second optical axis C2, folded by prism P, can be approximately perpendicular to the first optical axis C1. Prism P is disposed on the object side of the first lens 510. As described above, prism P refracts light reflected from the object to the image sensor 590.

[0177] A filter 580 is positioned in front of the image sensor 590 to block infrared radiation and other light included in the incident light. The image sensor 590 includes multiple optical sensors. The image sensor 590 configured as described above is designed to convert optical signals into electrical signals.

[0178] Table 13 shows the lens characteristics of the optical imaging system according to this example, Table 14 shows the aspherical values ​​of the optical imaging system according to this example, and Table 15 shows the distance values ​​between the lens groups depending on the first and second positions of the optical imaging system.

[0179] Table 13

[0180]

[0181]

[0182] (In Table 13, surfaces marked with * are aspherical surfaces)

[0183] Table 14

[0184]

[0185] Table 15

[0186] D1 4.99573 1.20000 D2 4.21427 4.80000 D3 3.00000 6.20000

[0187] Reference Figure 16 An optical imaging system according to a sixth embodiment is described.

[0188] Optical imaging system 600 may include a prism P, a first lens 610, a second lens 620, a third lens 630, a fourth lens 640, a fifth lens 650, a sixth lens 660, and a seventh lens 670, and may be divided into multiple lens groups. For example, optical imaging system 600 may be divided into a first lens group G1, a second lens group G2, and a third lens group G3. First lens group G1 includes two lenses. For example, first lens group G1 includes a first lens 610 and a second lens 620. The first lens 610 has positive refractive power and a shape in which the object side is convex and the image side is concave. The second lens 620 has negative refractive power and a shape in which the object side is convex and the image side is concave. Second lens group G2 includes three lenses. For example, second lens group G2 includes a third lens 630, a fourth lens 640, and a fifth lens 650. The third lens 630 has positive refractive power and a shape in which the object side is convex and the image side is convex. The fourth lens 640 has negative refractive power and a shape in which the object side is concave and the image side is concave. The fifth lens 650 has positive refractive power and a shape in which the object side is convex and the image side is convex. The third lens group G3 includes two lenses. For example, the third lens group G3 includes a sixth lens 660 and a seventh lens 670. The sixth lens 660 has positive refractive power and a shape in which the object side is concave and the image side is convex. The seventh lens 670 has negative refractive power and a shape in which the object side is concave and the image side is concave.

[0189] Lens groups G1, G2, and G3 are moved along the optical axis to change the focal length of the optical imaging system. For example, as the focal length of the optical imaging system increases, the distance D1 between the first lens group G1 and the second lens group G2, and the distance D2 between the second lens group G2 and the third lens group G3, can decrease. Simultaneously, as the focal length of the optical imaging system increases, the distance D3 between the third lens group G3 and the imaging plane can increase.

[0190] Furthermore, lens groups G1, G2, and G3 move along the optical axis to change the focal length of the optical imaging system. For example, at least one of the first lens group G1, the second lens group G2, and the third lens group G3 can move along the second optical axis C2. Additionally, the first lens group G1, the second lens group G2, and the third lens group G3 move along the second optical axis C2 by different dimensions to significantly reduce the amount of displacement required for focus adjustment. Figure 17 and Figure 18 As shown, the optical imaging system configured above exhibits aberration characteristics at different zoom positions.

[0191] The optical imaging system 600 includes a prism P, an aperture ST, a filter 680, and an image sensor 690.

[0192] The optical imaging system includes a prism P as a mechanism for folding or bending the optical path. Prism P folds light incident on a first optical axis C1 along a second optical axis C2. The second optical axis C2, folded by prism P, can be approximately perpendicular to the first optical axis C1. Prism P is disposed on the object side of the first lens 610. As described above, prism P refracts light reflected from the object to the image sensor 690.

[0193] A filter 680 is positioned in front of the image sensor 690 to block infrared radiation and other light included in the incident light. The image sensor 690 includes multiple optical sensors. The image sensor 690 configured as described above is designed to convert optical signals into electrical signals.

[0194] Table 16 shows the lens characteristics of the optical imaging system according to this example, Table 17 shows the aspherical values ​​of the optical imaging system according to this example, and Table 18 shows the distance values ​​between the lens groups depending on the first and second positions of the optical imaging system.

[0195] Table 16

[0196]

[0197]

[0198] (In Table 16, surfaces marked with * are aspherical surfaces) Table 17

[0199]

[0200] Table 18

[0201] D1 4.97162 1.20000 D2 4.33772 4.70434 D3 2.80000 6.20000

[0202] Reference Figure 19 An optical imaging system according to a seventh embodiment is described.

[0203] The optical imaging system 700 may include a prism P, a first lens 710, a second lens 720, a third lens 730, a fourth lens 740, a fifth lens 750, a sixth lens 760, and a seventh lens 770, and may be divided into multiple lens groups. For example, the optical imaging system 700 may be divided into a first lens group G1, a second lens group G2, and a third lens group G3. The first lens group G1 includes two lenses. For example, the first lens group G1 includes a first lens 710 and a second lens 720. The first lens 710 has positive refractive power and a shape in which the object side is convex and the image side is concave. The second lens 720 has negative refractive power and a shape in which the object side is convex and the image side is concave. The second lens group G2 includes three lenses. For example, the second lens group G2 includes a third lens 730, a fourth lens 740, and a fifth lens 750. The third lens 730 has positive refractive power and a shape in which the object side is convex and the image side is convex. The fourth lens 740 has negative refractive power and a shape in which the object side is concave and the image side is concave. The fifth lens 750 has positive refractive power and a shape in which the object side is convex and the image side is convex. The third lens group G3 includes two lenses. For example, the third lens group G3 includes a sixth lens 760 and a seventh lens 770. The sixth lens 760 has positive refractive power, with the object side concave and the image side convex. The seventh lens 770 has negative refractive power and a shape in which the object side is concave and the image side is concave.

[0204] Lens groups G1, G2, and G3 are moved along the optical axis to change the focal length of the optical imaging system. For example, as the focal length of the optical imaging system increases, the distance D1 between the first lens group G1 and the second lens group G2, and the distance D2 between the second lens group G2 and the third lens group G3, can decrease. Simultaneously, as the focal length of the optical imaging system increases, the distance D3 between the third lens group G3 and the imaging plane can increase.

[0205] Furthermore, lens groups G1, G2, and G3 move along the optical axis to change the focal length of the optical imaging system. For example, at least one of the first lens group G1, the second lens group G2, and the third lens group G3 can move along the second optical axis C2. Additionally, the first lens group G1, the second lens group G2, and the third lens group G3 move along the second optical axis C2 by different dimensions to significantly reduce the amount of displacement required for focus adjustment. Figure 20 and Figure 21 As shown, the optical imaging system configured above exhibits aberration characteristics at different zoom positions.

[0206] The optical imaging system 700 includes a prism P, an aperture ST, a filter 780, and an image sensor 790.

[0207] The optical imaging system includes a prism P as a mechanism for folding or bending the optical path. Prism P folds light incident on a first optical axis C1 along a second optical axis C2. The second optical axis C2, folded by prism P, can be approximately perpendicular to the first optical axis C1. Prism P is disposed on the object side of the first lens 710. As described above, prism P refracts light reflected from the object to the image sensor 790.

[0208] A filter 780 is positioned in front of the image sensor 790 to block infrared radiation and other light included in the incident light. The image sensor 790 includes multiple optical sensors. The image sensor 790 configured as described above is designed to convert optical signals into electrical signals.

[0209] Table 19 shows the lens characteristics of the optical imaging system according to this example, Table 20 shows the aspherical values ​​of the optical imaging system according to this example, and Table 21 shows the distance values ​​between the lens groups depending on the first and second positions of the optical imaging system.

[0210] Table 19

[0211]

[0212] (In Table 19, surfaces marked with * are aspherical surfaces)

[0213] Table 20

[0214]

[0215]

[0216] Table 21

[0217] D1 4.48000 1.09500 D2 3.72872 4.16075 D3 2.72000 5.67000

[0218] The optical imaging systems described in the above examples can share the following characteristics. For example, the focal length of the first lens is typically defined in the range of 20mm to 30mm, the focal length of the second lens is defined in the range of -10.0mm to -7.0mm, the focal length of the third lens is typically defined in the range of 6.0mm to 8.0mm, the focal length of the fourth lens is defined in the range of -11.0mm to -6.0mm, the focal length of the fifth lens is typically defined in the range of 7.4mm to 15mm, the focal length of the sixth lens is defined in the range of 10mm to 30mm, and the focal length of the seventh lens can be defined in the range of -14mm to -6.0mm. The total focal length of the optical imaging system is defined in the range of 12mm to 15mm, and the zoom ratio of the optical imaging system can be from 1.6 to 2.2.

[0219] In the first position of the optical imaging system, the distance D1 between the first lens group and the second lens group is greater than the distance D3 between the third lens group and the imaging surface, and the distance D2 between the second lens group and the third lens group is greater than the distance D3 between the third lens group and the imaging surface.

[0220] In the second position of the optical imaging system, the distance D1 between the first lens group and the second lens group is less than the distance D2 between the second lens group and the third lens group, and the distance D2 between the second lens group and the third lens group is less than the distance D3 between the third lens group and the imaging plane.

[0221] Table 22 shows the effective major axis radius [mm] of the lens according to the various examples, and Table 23 shows the effective minor axis radius [mm] of the lens according to the various examples.

[0222] Table 22

[0223]

[0224]

[0225] Table 23

[0226] L1S1es 2.240 2.240 1.715 1.750 2.240 2.240 1.785 L1S2es 2.013 2.049 1.614 1.614 1.977 2.040 1.629 L2S1es 1.856 1.893 1.472 1.448 1.800 1.889 1.439 L2S2es 1.826 1.839 1.445 1.425 1.758 1.844 1.389 L3S1es 1.960 1.946 1.526 1.526 1.855 1.946 1.470 L3S2es 1.869 1.891 1.510 1.475 1.852 1.890 1.457 L4S1es 1.799 1.809 1.492 1.419 1.821 1.812 1.449 L4S2es 1.795 1.741 1.455 1.400 1.846 1.743 1.464 L5S1es 1.856 1.785 1.519 1.470 1.905 1.785 1.539 L5S2es 1.828 1.764 1.463 1.429 1.864 1.765 1.483 L6S1es 1.908 1.822 1.785 1.785 1.972 1.815 1.820 L6S2es 2.275 2.135 1.753 1.807 2.401 2.135 1.863 L7S1es 2.261 2.118 1.750 1.789 2.398 2.126 1.820 L7S2es 2.377 2.241 1.882 1.925 2.441 2.258 1.915

[0227] Table 24 shows the optical characteristics of the optical imaging systems according to the first to seventh examples.

[0228] Table 24

[0229]

[0230]

[0231] Tables 25 to 27 show the conditional expression values ​​for the optical imaging systems according to the first to seventh examples. As can be seen from Tables 25 to 27, the optical imaging systems according to the first to seventh examples satisfy all the above conditional expressions.

[0232] Table 25

[0233]

[0234] Table 26

[0235]

[0236] Table 27

[0237]

[0238] Optical imaging systems, according to various examples, include those with... Figure 22 and Figure 23 The lens and the spacing maintaining member shown are illustrated. For reference, in Figure 22 Only the shape of the first lens is shown, but it should be noted that the second through seventh lenses can also be configured to have [the following characteristics]. Figure 22 The shape shown in the image.

[0239] The first lens L1 can be configured to have different lengths in a first direction and a second direction intersecting the optical axis. For example, in the first lens L1, the effective radius in the first direction (hereinafter referred to as the major axis effective radius) L1S1el can be greater than the effective radius in the second direction (hereinafter referred to as the minor axis effective radius) L1S1es. One surface of the first lens L1 can be formed as a straight line. For example, the two side surfaces parallel to the major axis effective radius of the first lens L1 can be formed as straight lines, such as... Figure 22 As shown in the diagram, the range linearly formed within the first lens L1 can be limited to a predetermined size. For example, the angle 2θ formed between the optical axis center C2 and the two ends of the linear portion of the first lens L1 can be selected within the range of 80 degrees to 92 degrees.

[0240] The spacing maintenance member SP can be formed into a roughly rectangular shape, such as... Figure 23 As shown in the diagram. For example, the length SPX1 of the spacer maintaining member SP in the first direction can be greater than the length SPY1 of the spacer maintaining member SP in the second direction. The holes in the spacer maintaining member SP can be approximately the same or similar in shape to the effective diameter of a lens. Figure 23 As shown, the hole in the spacing maintaining member SP according to this example can have a pair of parallel straight lines and a pair of curves. In the hole of the spacing maintaining member SP, the length SPX2 in the first direction can be greater than the length SPY2 in the second direction.

[0241] Optical imaging systems, according to various examples, can be installed in small terminals. For example, such as... Figures 24 to 27 As shown, at least one of the optical imaging systems according to the above example can be mounted on the rear or front surface of the small terminal 10.

[0242] The miniature terminal 10 may include multiple optical imaging systems 20, 30, 40, and 50. As an example, the miniature terminal 10 may include an optical imaging system 20 for capturing a distant field of view and an optical imaging system 30 for capturing a near field of view, such as... Figure 24 As shown in the diagram. As another example, the small terminal 10 may include an optical imaging system 20 for capturing a distant field of view and two optical imaging systems 30 and 40 for capturing a near field of view, as illustrated. Figure 25As shown in the figure. As another example, the small terminal 10 may include an optical imaging system 20 for capturing a distant field of view, and optical imaging systems 30, 40 and 50 that have different focal lengths from each other.

[0243] The arrangement of the optical imaging systems 20, 30, 40, and 50 can be modified in different ways, such as... Figures 24 to 27 As shown in the image.

[0244] As described above, it is possible to realize an optical imaging system that can be installed in a thin, small-sized terminal while having a long focal length.

[0245] 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 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. Appropriate 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 a total of seven lenses with refractive power, wherein, The lens includes: The first lens, second lens, third lens, fourth lens, fifth lens, sixth lens, and seventh lens are arranged sequentially from the object side. The optical imaging system includes: The first lens group includes the first lens and the second lens; The second lens group includes the third to the fifth lenses; and The third lens group includes the sixth lens and the seventh lens. The first lens group, the second lens group, and the third lens group are configured to be movable along the optical axis to a first position and a second position. In the first position, the distance between the first lens group and the second lens group is greater than the distance between the third lens group and the imaging plane, and the distance between the second lens group and the third lens group is greater than the distance between the third lens group and the imaging plane. In the first position, the optical imaging system satisfies the following conditional expression: -2.0 < L3R2 / f < -0.5 3.0 < f / IMG_HT < 4.0 0.4 < BFL / 2IMG_HT < 0.6 Where L3R2 represents the radius of curvature of the image-side surface of the third lens, f represents the focal length of the optical imaging system, IMG_HT represents half the diagonal length of the imaging plane, BFL is the distance from the image-side surface of the seventh lens to the imaging plane, 2IMG_HT is the diagonal length of the imaging plane, and at least one of the first to the seventh lens has an aspherical surface. in: The first lens has positive refractive power, a convex object-side surface, and a concave image-side surface. The second lens has negative refractive power, a convex object-side surface, and a concave image-side surface. The third lens has positive refractive power, a convex object-side surface, and a convex image-side surface. The fourth lens has negative refractive power and a concave image-side surface. The fifth lens has positive refractive power and a convex object-side surface. The sixth lens has positive refractive power, a concave object-side surface, and a convex image-side surface, and The seventh lens has negative refractive power, a concave object-side surface, and a concave image-side surface.

2. The optical imaging system according to claim 1, further comprising: A prism is disposed on the object side of the first lens.

3. The optical imaging system according to claim 2, wherein, In the first position, the optical imaging system satisfies the following conditional expression: 2.0 < PTTL / f < 3.0 Wherein, PTTL represents the distance from the reflecting surface of the prism to the imaging surface.

4. The optical imaging system according to claim 1, wherein, The optical imaging system satisfies the following conditional expression: -1.0 < (L3R1+L3R2) / (L3R1-L3R2) < -0.1 Wherein, L3R1 represents the radius of curvature of the object-side surface of the third lens.

5. The optical imaging system according to claim 1, wherein, In the first position, the optical imaging system satisfies at least one of the following conditional expressions: 0.10 < f / f1 < 0.80 1.0 < f / f3 < 3.0 -2.0 < f / f4 < -0.50 0.2 < f / f5 < 2.0 Wherein, f1 represents the focal length of the first lens, f3 represents the focal length of the third lens, f4 represents the focal length of the fourth lens, and f5 represents the focal length of the fifth lens.

6. The optical imaging system according to claim 1, wherein, The optical imaging system satisfies at least one of the following conditional expressions: -20 mm < fG1 < -13 mm 5.0 mm < fG2 < 10 mm -24 mm < fG3 < -16 mm Wherein, fG1 represents the composite focal length of the first lens group, fG2 represents the composite focal length of the second lens group, and fG3 represents the composite focal length of the third lens group.

7. The optical imaging system according to claim 1, wherein, In the first position, the optical imaging system satisfies the following conditional expression: -1.5 < L6R2 / f < -0.5 Wherein, L6R2 represents the radius of curvature of the image-side surface of the sixth lens.

8. The optical imaging system according to claim 1, wherein, The optical imaging system satisfies the following conditional expression: 1.0 < (L6R1+L6R2) / (L6R1-L6R2) < 5.0 Wherein, L6R1 represents the radius of curvature of the object side of the sixth lens, and L6R2 represents the radius of curvature of the image side of the sixth lens.

9. The optical imaging system according to claim 1, wherein, The optical imaging system satisfies the following conditional expression: 0.11 < Nd6-Nd7 < 0.13 Wherein, Nd6 represents the refractive index of the sixth lens, and Nd7 represents the refractive index of the seventh lens.

10. A portable electronic device, comprising: Three or more camera modules, wherein the optical axis of the first camera module is formed in a direction different from the optical axes of the second and third camera modules. The first camera module includes the optical imaging system as described in claim 1.

11. The portable electronic device according to claim 10, wherein, Among the first camera module to the third camera module, the first camera module has the narrowest field of view and the longest focal length, the third camera module has the widest field of view and the shortest focal length, and the second camera module has a field of view that is wider than that of the first camera module and narrower than that of the third camera module.

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