Camera module and electronic device comprising same

Abstract

An electronic device according to one embodiment of the present disclosure may comprise: a lens assembly including a first lens, a second lens, a third lens, and a fourth lens disposed along an optical axis direction toward an upper side from a subject side; and an image sensor disposed to receive the light focused or guided by the lens assembly. The first lens may have positive refractive power. The second lens may have negative refractive power, and the third lens may have positive refractive power. At least one of a subject-side surface and an image-side surface of the second lens (L2S) may have an inflection point.

Description

Camera module and electronic device including the same

[0001] Various embodiments of the present disclosure relate to, for example, a miniature camera module and an electronic device including the same.

[0002] Advances in information and communication technology (ICT) and semiconductor technology have led to a rapid increase in the proliferation and use of various electronic devices. In particular, recent electronic devices are being developed to be portable and capable of communication. Furthermore, electronic devices can output stored information in the form of audio or video. For example, electronic devices (e.g., laptop computers) can be equipped with entertainment features such as gaming, multimedia features such as music and video playback, document creation capabilities, video conferencing, and photography and / or video recording capabilities.

[0003] To enable the above video conferencing, photo and / or video recording functions, laptop computers may be equipped with a small camera, typically located in the bezel surrounding the display.

[0004] The above information may be provided as background art to aid in understanding the present disclosure. No claim or determination is made as to whether any of the above is applicable as prior art in connection with the present disclosure.

[0005] An electronic device according to one embodiment of the present disclosure may include a lens assembly including a first lens, a second lens, a third lens, and a fourth lens arranged along an optical axis direction from a subject side toward an upper side; and an image sensor arranged to receive light focused or guided by the lens assembly. The first lens may have positive refractive power. The second lens may have negative refractive power, and the third lens may have positive refractive power. At least one of a subject-side surface or an image-side surface of the second lens (L2) may have an inflection point.

[0006] In one embodiment, the electronic device may satisfy the following [formula 1] and [formula 2].

[0007] [Formula 1]

[0008]

[0009] [Formula 2]

[0010]

[0011] Here, 'OAL' is the distance from the subject side of the first lens to the image plane, HFoV is the half-angle of view of the optical system including the lens assembly, and FoV is the angle of view of the optical system including the lens assembly.

[0012] An electronic device according to one embodiment of the present disclosure may include a display; a bezel structure that at least partially surrounds the display; and a camera module disposed in the bezel structure. The camera module may include a lens assembly including a first lens, a second lens, a third lens, and a fourth lens disposed along an optical axis direction from a subject side toward an upper side; and an image sensor disposed to receive light focused or guided by the lens assembly. The first lens (L1) may have positive refractive power. The second lens (L2) may have negative refractive power, and the third lens (L3) may have positive refractive power. At least one of a subject-side surface or an image-side surface of the second lens (L2) may have an inflection point. The image-side surface of the second lens may have an inflective shape in which a central portion adjacent to the optical axis is concave and a peripheral portion is convex.

[0013] In one embodiment, the electronic device may satisfy the following [formula 1] and [formula 2].

[0014] [Formula 1]

[0015]

[0016] [Formula 2]

[0017]

[0018] Here, 'OAL' is the distance from the subject side of the first lens to the image plane, HFoV is the half-angle of view of the optical system including the lens assembly, and FoV is the angle of view of the optical system including the lens assembly.

[0019] The above-described aspects or other aspects, configurations and / or advantages of one embodiment of the present disclosure may be further clarified by the following detailed description taken in conjunction with the accompanying drawings.

[0020] FIG. 1A is a schematic diagram showing a lens assembly according to one embodiment of the present disclosure.

[0021] Figure 1b is an enlarged view of the second lens portion of Figure 1a.

[0022] FIG. 2 is a graph showing spherical aberration of a lens assembly according to the embodiment of FIG. 1a.

[0023] FIG. 3 is a graph showing astigmatism of a lens assembly according to the embodiment of FIG. 1a.

[0024] FIG. 4 is a graph showing the distortion aberration of the lens assembly according to the embodiment of FIG. 1a.

[0025] FIG. 5 is a schematic diagram showing a lens assembly according to one embodiment of the present disclosure.

[0026] FIG. 6 is a graph showing spherical aberration of a lens assembly according to the embodiment of FIG. 5.

[0027] FIG. 7 is a graph showing astigmatism of a lens assembly according to the embodiment of FIG. 5.

[0028] FIG. 8 is a graph showing the distortion aberration of the lens assembly according to the embodiment of FIG. 5.

[0029] FIG. 9 is a schematic diagram showing a lens assembly according to one embodiment of the present disclosure.

[0030] FIG. 10 is a graph showing spherical aberration of a lens assembly according to the embodiment of FIG. 9.

[0031] FIG. 11 is a graph showing astigmatism of a lens assembly according to the embodiment of FIG. 9.

[0032] FIG. 12 is a graph showing the distortion aberration of the lens assembly according to the embodiment of FIG. 9.

[0033] FIG. 13 is a schematic diagram showing a lens assembly according to one embodiment of the present disclosure.

[0034] FIG. 14 is a graph showing spherical aberration of a lens assembly according to the embodiment of FIG. 13.

[0035] FIG. 15 is a graph showing astigmatism of a lens assembly according to the embodiment of FIG. 13.

[0036] FIG. 16 is a graph showing the distortion aberration of the lens assembly according to the embodiment of FIG. 13.

[0037] FIG. 17 is a schematic diagram showing a lens assembly according to one embodiment of the present disclosure.

[0038] FIG. 18 is a graph showing spherical aberration of a lens assembly according to the embodiment of FIG. 17.

[0039] FIG. 19 is a graph showing astigmatism of a lens assembly according to the embodiment of FIG. 17.

[0040] FIG. 20 is a graph showing the distortion aberration of the lens assembly according to the embodiment of FIG. 17.

[0041] FIG. 21 is a block diagram of an electronic device within a network environment according to various embodiments.

[0042] FIG. 22 is a block diagram illustrating a camera module according to various embodiments.

[0043] Throughout the attached drawings, similar reference numbers may be assigned to similar parts, components and / or structures.

[0044] A camera may be mounted on the bezel surrounding the display of a laptop computer. Because the bezel area is narrow, the camera mounted therein may also need to be very compact. Furthermore, the camera may need to have a sufficient back focal length (BFL) to accommodate essential components, such as filters and image sensors, within the camera. Considering the limited space required for the camera and the necessary BFL, the camera mounted on a laptop computer may be designed to have an angle of view of approximately 85 to 88 degrees.

[0045] However, as video conferencing has become more active recently, there is a growing demand for laptop computers that provide a user environment with a viewing angle of approximately 90 degrees or more.

[0046] Various embodiments of the present disclosure can provide a camera module having an angle of view of approximately 90 degrees or more, having optimal optical performance, and being compactly configured for placement in an electronic device (e.g., a laptop computer) with a narrow component placement space, and an electronic device including the same.

[0047] The technical problems to be achieved in the present disclosure are not limited to the technical problems mentioned above, and other technical problems not mentioned will be clearly understood by a person having ordinary knowledge in the technical field to which the present disclosure pertains.

[0048] Hereinafter, various implementation examples of a lens assembly and components included therein will be examined with reference to FIGS. 1a to 20.

[0049] FIG. 1A is a schematic diagram illustrating a lens assembly (100) according to one embodiment of various embodiments of the present disclosure. FIG. 1B is an enlarged view of a second lens portion of FIG. 1A.

[0050] Referring to FIG. 1A, a lens assembly (100) according to one of various embodiments of the present disclosure may include a plurality of lenses (e.g., L1, L2, L3, L4) and an image sensor (IS). The lens assembly (100), including the plurality of lenses (e.g., L1, L2, L3, L4) and the image sensor (IS), may form an optical system having an angle of view exceeding approximately 80 degrees, and in some embodiments, covering not only 100 degrees but also approximately 110 degrees.

[0051] According to various embodiments, an image sensor (IS) may be mounted on an electronic device. Here, the electronic device (e.g., a laptop computer) may include a display, a bezel structure that at least partially surrounds the display, and a camera module (e.g., a camera module (2180) of FIG. 21 and a camera module (2280) of FIG. 22) disposed on the bezel structure. A lens assembly (100) including a plurality of lenses (e.g., L1, L2, L3, L4) may be mounted on an optical device and / or the electronic device on which the image sensor (IS) is mounted. For example, in describing various embodiments of the present disclosure, an example in which the image sensor (IS) is mounted on the lens assembly (100) will be described; however, the image sensor (IS) may be mounted and used on the optical device and / or the electronic device on which the lens assembly (100) is mounted.

[0052] According to various embodiments, the image sensor (IS) is a sensor that is mounted on a circuit board (not shown) or the like and arranged in a state aligned with an optical axis (OI), and can react to light. The image sensor (IS) may include, for example, a sensor such as a complementary metal-oxide semiconductor (CMOS) image sensor or a charge coupled device (CCD). The image sensor (IS) is not limited thereto, and may include, for example, various elements that convert an image of a subject into an electrical image signal. The image sensor (IS) can obtain an image of the subject (obj) by detecting brightness information, gradation information, color information, etc. of the subject (obj) from light passing through a plurality of lenses (e.g., L1, L2, L3, L4).

[0053] According to various embodiments, the plurality of lenses (e.g., L1, L2, L3, L4) included in the lens assembly (100) may include plastic lenses. In addition, the image sensor (IS) may have an image height of approximately 1.19 mm. For reference, the image height here may mean half of the diagonal length of the image sensor in an image sensor that is formed in an approximately rectangular (e.g., square) shape with the optical axis (OI) as the normal but is thin. According to one embodiment, the image sensor (IS) may be an image sensor having a size of 1 / 7" (approximately 0.14 inch).

[0054] According to various embodiments, the lens assembly (100) may have an optical axis (OI) from the object side (O) to the image side (I). In describing the configuration of each lens below, for example, the object side may indicate the direction in which the object (obj) is located, and the image side may indicate the direction in which the image-forming plane (img) on ​​which the image is formed is located. In addition, the "surface facing the subject side" of the lens means, for example, the side on the side in which the object (obj) is located based on the optical axis (OI), and may refer to the left surface (or front surface) of the lens in the drawings according to various embodiments of the present disclosure, and the "surface facing the image side" may refer to the side in which the image-forming plane (img) is located based on the optical axis (OI), and may refer to the right surface (or back surface) of the lens in the drawings. Here, the imaging plane (img) may be, for example, the part where the imaging element or image sensor (IS) is placed and the image is formed.

[0055] Among the plurality of lenses included in the lens assembly (100), looking at the subject side (O) along the optical axis (OI) can be defined as 'facing the first direction (or forward)', and looking at the image side (I) along the optical axis (OI) can be defined as 'facing the second direction (or rear)'. According to various embodiments, when a lens (e.g., the first lens (L1)) includes a surface facing the subject side (O), the surface facing the subject side (O) can be said to face the first direction. And, when a lens (e.g., the first lens (L1)) includes a surface facing the image side (I), the surface facing the image side (I) can be said to face the second direction.

[0056] Referring to FIG. 1A, a lens assembly (100) according to various embodiments may include, for example, a first lens (L1), a second lens (L2), a third lens (L3), and a fourth lens (L4) sequentially arranged in the direction of an optical axis (OI) (e.g., a direction from the subject (O) to the image (I) side of FIG. 1A). The plurality of lenses (e.g., L1, L2, L3, L4) may be arranged in a state in which the optical axes are aligned with the image sensor (IS). 'The plurality of lenses (e.g., L1, L2, L3, L4) being optically aligned with the image sensor (IS)' may mean that the centers of the plurality of lenses (e.g., L1, L2, L3, L4) and the center of the image sensor (IS) are aligned on the optical axis.

[0057] In describing a plurality of lenses (e.g., L1, L2, L3, L4) according to various embodiments, the side of each lens closer to the optical axis (OI) may be referred to as a 'chief portion' hereinafter, and the side farther from the optical axis (OI) (or near the edge of the lens) may be referred to as a 'marginal portion' hereinafter. The chief portion may be, for example, a portion of the first lens (L1) that intersects the optical axis (OI). The marginal portion may be, for example, a portion of the first lens (L1) that is spaced apart from the optical axis by a predetermined distance. The marginal portion may include, for example, an end portion of the lens that is farthest from the optical axis (OI) of the lens.

[0058] According to various embodiments, in order to configure an optical device, the first lens (L1) included in the lens assembly (100) may have positive refractive power, the second lens (L2) may have negative refractive power, and the third lens (L3) may have positive refractive power. Meanwhile, the fourth lens (L4) may have either positive or negative refractive power selected. For example, the first lens (L1), the second lens (L2), the third lens (L3), and the fourth lens (L4) may have refractive powers of 'positive, negative, positive, positive' or 'positive, negative, positive, negative', in that order. In the above-described embodiments, when light parallel to the optical axis (OI) is incident on a lens having positive refractive power, the light passing through the lens may be condensed. For example, the lens having positive refractive power may be a lens based on the principle of a convex lens. On the other hand, if parallel light is incident on a lens with negative refractive power, the light passing through the lens may be dispersed. For example, a lens with negative refractive power may be based on the principle of a concave lens.

[0059] According to various embodiments, the first lens (L1) and the second lens (L2) may be configured as small-diameter lenses having an effective diameter that is relatively smaller than the other lenses (the third lens (L3) and the fourth lens (L4)) in a four-element lens assembly. Here, the 'effective diameter' may mean the distance between one end and the other end of a boundary where light is received by the lens in a direction perpendicular to the optical axis (OI). Since the lenses in an electronic device must be installed within a limited space, the first lens (L1) and the second lens (L2) may be implemented as small-diameter lenses, and the first lens (L1) may be configured as a lens having a positive refractive power and the second lens (L2) may be configured as a lens having a negative refractive index, thereby having the effect of reducing the total length of the optical system.

[0060] According to various embodiments, the surfaces (S2, S3, S4, S5) of the first lens (L1) and the second lens (L2) may be formed as aspheric surfaces. Spherical aberration that may occur in the first lens (L1) and the second lens (L2) may be reduced and / or prevented by implementing the surfaces (S2, S3, S4, S5) of the first lens (L1) and the second lens (L2) as aspheric surfaces. In addition, the surfaces (S6, S7, S8, S9) of the third lens (L3) and the fourth lens (L4) may also be formed as aspheric surfaces.

[0061] According to various embodiments, the radius of curvature, thickness, OAL (overall length), focal length, etc. of the lens of the present disclosure may all have units of mm unless otherwise specified. In addition, the thickness of the lens, the spacing between lenses, and OAL (or TTL (total track length)) may be distances measured around the optical axis of the lens. In addition, in the description of the shape of the lens, the meaning of a convex shape on one side may mean that the optical axis portion of the corresponding side is convex unless there is a separate description such as having an inflection point. The meaning of a concave shape on one side may mean that the optical axis portion of the corresponding side is concave unless there is a separate description such as having an inflection point. For example, even if one side of the lens (the optical axis portion of the corresponding side) is described as having a convex shape, the edge portion of the lens (a portion spaced apart from the optical axis portion of the corresponding side by a predetermined distance) may be concave. Similarly, even if one surface of a lens (the optical axis portion of that surface) is described as having a concave shape, the edge portion of the lens (the portion spaced a predetermined distance from the optical axis portion of that surface) may be convex.

[0062] In the detailed description and claims below, an inflection point may mean a point where a radius of curvature changes at a portion that does not intersect the optical axis. The inflection point may be located at a point where one surface of the lens changes from a convex shape to a concave shape, or where one surface of the lens changes from a concave shape to a convex shape. According to the present disclosure, at least one of the subject-side surface (S4) or the image-side surface (S5) of the second lens (L2) may include an inflection point. In one embodiment, the second lens (L2) may have an inflective shape in which the image-side surface (S5) is concave in the center adjacent to the optical axis and convex in the peripheral portion. In another embodiment, the subject-side surface (S4) of the second lens (L2) may also have an inflective shape in which the center adjacent to the optical axis is concave and the peripheral portion is convex. Referring to FIGS. 1A and 1B, the second lens (L2) may have an inflection shape on both the subject-side surface (S4) and the image-side surface (S5), and may include a first inflection point (P1) on the subject-side surface (S4) and a second inflection point (P2) on the image-side surface (S5).

[0063] The first lens (L1) may have a surface (S2) facing the subject side (O) that is convex toward the subject side, and a surface (S3) facing the image side (I) that may be convex or concave toward the image side. When the angle of view of the optical system is less than 90 degrees, the total focal length is longer than when the angle of view is 90 degrees or more, so the overall length of the lens assembly may be longer. Therefore, when the angle of view of the optical system is less than 90 degrees, the first lens (L1) may be a meniscus lens in which the surface (S2) facing the subject side (O) is convex toward the subject side (O), and the surface (S3) facing the image side (I) is concave toward the image side (I), thereby reducing the overall length of the lens assembly. When the angle of view of the optical system is 90 degrees or more, it may be advantageous to apply a biconvex lens, as shown in Fig. 1a, in which the surface (S2) facing the subject side (O) is convex toward the subject side (O) and the surface (S3) facing the image side (I) is convex toward the image side (I), as the first lens (L1).

[0064] The lens assembly (100) may include at least one aperture (stop) (S1). Depending on the position of the aperture, the amount of light reaching the imaging plane (img) of the image sensor (IS) may be adjusted. According to one embodiment, the aperture may be positioned adjacent to the subject-side surface (S2) in front of the first lens (L1). According to another embodiment, the aperture may be positioned adjacent to the image-side surface (S3) at the rear of the first lens (L1). In FIG. 1A, the aperture is positioned adjacent to the subject-side surface (S2) in front of the first lens (L1) to minimize the outer diameter of the lens, thereby minimizing the entrance diameter of the lens assembly.

[0065] The second lens (L2) may have a surface (S4) facing the subject side (O) that is convex or concave toward the subject side, and a surface (S5) facing the image side (I) that is concave toward the image side. When the angle of view of the optical system is less than 90 degrees, a biconcave shape, which is advantageous in terms of reducing the overall length of the lens assembly and / or securing optical performance, i.e., a shape in which the surface (S4) facing the subject side (O) is concave toward the subject side, and the surface (S5) facing the image side (I) is concave toward the image side, may be applied. Since the center of the second lens (L2) has a concave shape, spherical aberration can be easily controlled. When the angle of view of the optical system is 90 degrees or more, a meniscus shape is applied in which the surface (S4) facing the subject side (O) is convex toward the subject side and the surface (S5) facing the image side (I) is concave toward the image side, thereby effectively controlling astigmatism occurring in the periphery due to the shortened focal length. Referring to FIGS. 1A and 1B, as mentioned above, since the surface (S4) facing the subject side (O) and the surface (S5) facing the image side of the second lens (L2) both have an inflection shape, both the surface (S4) facing the subject side (O) and the surface (S5) facing the image side can have a shape that is convex toward the image side in the periphery, and this can prevent the angle of incidence of peripheral light incident on the image sensor (IS) from becoming large.

[0066] The third lens (L3) may have a meniscus shape in which the subject-side surface (S6) and the image-side surface (S7) are convex toward the image side. According to one embodiment, when the image-side surface (S5) of the second lens (L2) is concave toward the image side, the subject-side surface (S6) of the third lens (L3) is formed to be concave toward the subject side, so that the second lens (L2) and the third lens (L3) may have a symmetrical shape based on an imaginary line perpendicular to the optical axis between the second lens (L2) and the third lens (L3). This may facilitate control of spherical aberration. In addition, since the third lens (L3) has a meniscus shape, it may also be advantageous in controlling astigmatism in the periphery. According to one embodiment, the third lens (L3) may also have an inflection shape on both the subject-side surface (S6) and the image-side surface (S7). For example, a third inflection point (P3) may be formed on the subject-side surface (S6) of the third lens (L3), and a fourth inflection point (P4) may be formed on the image-side surface (S7). The third lens (L3) may have a meniscus shape and / or include an inflection point, thereby effectively controlling spherical aberration at the center of the lens and astigmatism at the periphery.

[0067] The fourth lens (L4) may have a meniscus shape in which the subject-side surface (S8) and the image-side surface (S9) are convex toward the subject. Since the center of the fourth lens (L4) has a meniscus shape in which the center is convex toward the subject, the size of the electronic device can be miniaturized, and, for example, even though it has an angle of view exceeding 100 degrees, it may be advantageous in securing the entire focal length (EFL) and the back focal length (BFL). According to one embodiment, the fourth lens (L4) may also have an inflection shape on both the subject-side surface (S8) and the image-side surface (S9). For example, a fifth inflection point (P5) may be formed on the subject-side surface (S8) of the fourth lens (L4), and a sixth inflection point (P6) may be formed on the image-side surface (S9). The fourth lens (L4) may have a meniscus shape and / or include an inflection point, thereby facilitating aberration correction in the peripheral region of the image sensor. According to one embodiment, the fourth lens (L4) may have an inflection shape in which the subject-side surface (S8) and the image-side surface (S9) have different radius of curvatures in the central and peripheral regions adjacent to the optical axis, respectively. Accordingly, this may be advantageous in controlling peripheral astigmatism and may also be advantageous in securing the amount of peripheral light incident on the image sensor.

[0068] According to various embodiments, the first lens (L1) and the second lens (L2) may be configured as lenses having small effective diameters to reduce the size of the optical device, while the third lens (L3) and the fourth lens (L4) may be configured as lenses having relatively large effective diameters. According to one embodiment, the fourth lens (L4) may have the largest effective diameter in the lens assembly (100). In addition, by sequentially arranging the first lens (L1), the second lens (L3), the third lens (L3), and the fourth lens (L4) as lenses having increasingly larger effective diameters toward the image sensor (IS), aberrations can be effectively corrected.

[0069] According to various embodiments, the lens assembly (100) may be implemented with lenses, for example, each made of a synthetic resin (e.g., plastic) having a predetermined refractive index. Since the plurality of lenses are made of a synthetic resin material, a high degree of design freedom in size and shape may be achieved. For example, in terms of refractive indices at a specific wavelength of visible light (e.g., 587.6000 nm, d-line), the first lens (L1) may be formed of a synthetic resin lens having a refractive index of 1.55 or less, the second lens (L2) may be formed of a synthetic resin lens having a refractive index of 1.66 or more, the third lens (L3) may be formed of a synthetic resin lens having a refractive index of 1.55 or less, and the fourth lens (L4) may be formed of a synthetic resin lens having a refractive index of 1.55 or less. Through such a design of refractive indices, miniaturization of the lens assembly and / or an electronic device including the same may be possible. In one embodiment, a lens composed of a synthetic resin (e.g., plastic) may have a tendency for its Abbe number to increase or decrease as its refractive index decreases or increases, respectively.

[0070] According to various embodiments, among the plurality of lenses (e.g., L1, L2, L3, L4) constituting the lens assembly (100), the closer the gap between one lens and another adjacent lens, the shorter the overall length (OAL) of the lens assembly (100) may be. For example, when an electronic device including the lens assembly (100) according to various embodiments of the present disclosure is to be manufactured in a small size, it is advantageous to keep the overall length of the lens assembly (100) as short as possible. However, there may be a physical limitation in shortening the overall length of the lens assembly (100) while securing an appropriate telephoto ratio. According to various embodiments of the present disclosure, the gap between the plurality of lenses (e.g., L1, L2, L3, L4) may be designed in various ways depending on the optical characteristics (e.g., aberration characteristics, wide-angle characteristics, and / or brightness characteristics) required for the lens assembly (100).

[0071] The lens assembly (100) may further include a filter (F) disposed between the fourth lens (L4) and the image sensor (IS). The filter (F) includes a subject-side surface (S10) and an image-side surface (S11), and may block light, such as infrared rays, detected by a film or an image sensor of an optical device. The filter (F) may include, for example, at least one of a low pass filter and a cover glass. For example, when the filter (F) is mounted, the color of an image, such as one detected and captured by the image sensor (IS), may be made closer to the color sensed by a person when viewing an actual object. In addition, the filter (F) may transmit visible light and emit infrared rays to the outside, thereby preventing infrared rays from being transmitted to the imaging surface (img) of the image sensor.

[0072] The lens assembly (100) as described above can have a wide angle of view while being placed in a narrow area by satisfying the following [Formula 1] and [Formula 2].

[0073] [Formula 1]

[0074]

[0075] [Formula 2]

[0076]

[0077] Here, 'OAL' may mean the distance from the subject side (S2) of the first lens (L1) to the image plane (img), HFoV may mean the half-angle of view of the optical system including the lens assembly, and FoV may mean the angle of view of the optical system including the lens assembly. The above [Formula 1] is an equation representing the ratio of the total length of the optical system including the lens assembly to the half-angle of view. If the lens assembly and / or the electronic device exceeds the upper limit of the above [Formula 1], the total length may be large compared to the angle of view, making miniaturization difficult. Conversely, if it falls below the lower limit, the total length may become too small, making it difficult to include four lenses, and thus making it difficult to secure sufficient optical performance. The above [Formula 2] is an equation limiting the angle of view of the optical system including the lens assembly. If the lens assembly and / or electronics exceed the upper limit of the above [Equation 2], the short focal length may be advantageous for miniaturization, but it may be difficult to secure a back focal length (BFL) for arranging components such as filters or image sensors. Conversely, if the BFL falls below the lower limit, the focal length becomes longer, resulting in a longer overall length, which may be detrimental to miniaturization of the lens assembly.

[0078] In addition, the lens assembly (100) as described above can satisfy the following [Formula 3].

[0079] [Formula 3]

[0080]

[0081] Here, Vd1 may refer to the Abbe number of the first lens (L1), and Vd2 may refer to the Abbe number of the second lens (L2). The above [Formula 3] is an equation regarding the difference in Abbe numbers between the first lens (L1) and the second lens (L2). If the lens assembly and / or electronic device exceeds the upper limit of [Formula 3], it may be difficult to apply a synthetic resin material (e.g., a plastic lens), and if it falls below the lower limit, it may be difficult to correct the chromatic aberration of the optical system.

[0082] In addition, the lens assembly (100) as described above can satisfy the following [Equation 4].

[0083] [Formula 4]

[0084]

[0085] Here, 'nd3' may refer to the d-line (e.g., 587.6000 nm) refractive index of the third lens (L3). The refractive index of the second lens (L2) may be set to 1.66 or more, and the above [Formula 4] may be an equation for determining the refractive index of the third lens (L3) relative to the second lens (L2). If the lens assembly and / or the electronic device exceeds the upper limit in [Formula 4], the difference in refractive index between the second lens (L2) and the third lens (L3) may be small, making it difficult to control chromatic aberration, and if it falls below the lower limit in [Formula 4], the refractive index of the third lens (L3) may be excessively small, making it difficult to control aberration.

[0086] In addition, the lens assembly (100) as described above can satisfy the following [Formula 5].

[0087] [Formula 5]

[0088]

[0089] Here, 'f1' may be the focal length of the first lens (L1), and 'f3' may be the focal length of the third lens (L3). If the lens assembly and / or the electronic device exceeds the upper limit of [Equation 5], the focal length of the third lens (L3) may become excessively long compared to the focal length of the first lens (L1), and the relative refractive power of the third lens (L3) may decrease. As a result, miniaturization of the electronic device may also be difficult. If the lens assembly and / or the electronic device falls below the lower limit of [Equation 5], the relative refractive power of the third lens (L3) may become strong, which may be advantageous for miniaturization of the electronic device, but may cause a problem in that the sensitivity of the optical system increases.

[0090] In addition, the lens assembly (100) as described above can satisfy the following [Formula 6].

[0091] [Formula 6]

[0092]

[0093] Here, 'OAL' is the distance from the subject-side surface (S2) of the first lens (L1) to the image plane (img), and 'IH' may be the maximum height of the image plane (img). If the lens assembly and / or the electronic device exceed the upper limit of [Formula 6], the total length of the lens assembly increases compared to the image sensor (IS) height, which may make it difficult to miniaturize the lens assembly, and if it falls below the lower limit, the space required to include four lenses and / or the distance between the lenses and the sensor may become narrow, resulting in a shortage of image sensor (IS) assembly space and filter (F) assembly space, and a lack of focus adjustment margin due to focus error for each lens may cause a large number of focusing defects during manufacturing.

[0094] [Table 1] below may describe various optical data regarding the four lenses (e.g., L1, L2, L3, L4) and / or the filter (F) included in the lens assembly (100). 'obj' may refer to an object, and 'img' may refer to an imaging surface of an image sensor (IS). 'S2 to S11' may refer to surfaces of a plurality of related lenses (e.g., L1, L2, L3, L4) and / or the filter (F). 'S1' may refer to an aperture (sto). In addition, y radius may refer to a radius of curvature of the lens, Thickness may refer to a thickness or air gap of the lens, Nd may refer to a refractive index of a medium (e.g., a lens), and Vd may refer to an Abbe number of the lens. A lens assembly (100) may have an F number (Fno) of approximately 2.27, an angle of view (ANG) of approximately 95.92 degrees, a focal length of approximately 1.05 mm, an image height (ImgH) of an image sensor (IS) of 1.19, and may satisfy the above-described equations (and / or at least one of the above-described equations) while having optical data shown in [Table 1] below.

[0095] Lens surface (surface) Lens surface type (surface type) Radius of curvature (y radius) Thickness (Thickness) Refractive index (Nd) Abbe number (Vd) obj Sphere infinity 500 S 1 (sto) Sphere infinity - 0.014 S 2 Odd Polynomial 1.46 6 0.25 7 1.5 4 4 0 0 8 5 5 9 1 S 3 Odd Polynomial - 1.77 6 0.07 8 S 4 Odd Polynomial 3.60 8 0.16 0 1.67 0 7 3 19 2 2 9 9 S 5 Odd Polynomial 1.35 1 0.08 0 S 6 Odd Polynomial - 0.75 6 0.30 5 1.5 4 4 0 0 8 5 5 9 1 S 7 Odd Polynomial - 0.50 7 0.02 0 S 8 Odd Polynomial0.3390.1801.54400855.91S9Odd Polynomial0.2900.190S10Sphereinfinity0.1101.51679864.1983S11Sphereinfinity0.227imgSphereinfinity0.000

[0096] The refractive index data of the above [Table 1] may represent the refractive index at a wavelength of, for example, 587.6000 nm. [Table 2] and [Table 3] below describe the aspherical coefficients of the four lenses (e.g., L1, L2, L3, L4) included in the lens assembly (100), and the aspherical coefficients can be calculated using the following [Equation 7].

[0097] [Formula 7]

[0098]

[0099] Here, 'x' is the distance (sag) from the vertex of the lens in the direction of the optical axis (OI), 'R' is the radius of curvature at the vertex of the lens, 'y' is the distance in the direction perpendicular to the optical axis, 'K' is the Conic constant, and 'A' is the i ' can each mean an aspherical coefficient.

[0100] 렌즈면(surface)S2S3S4S5k-2.40117E+00-1.97557E+005.47158E+01-9.27532E+01A4-1.89661E+00-5.44020E+00-1.02434E+011.87425E+00A67.88274E+01-3.83983E+012.0IS0E+02-1.15517E+02A8-5.18898E+033.66377E+03-1.04100E+042.32273E+03A 10 1.79584E+05-1.25990E+053.59359E+05-3.31640E+04A 12 -3.63387E+062.36630E+06-7.76735E+063.54161E+05A 14 3.91789E+07-2.48313E+071.05081E+08-2.77294E+06A 16 -1.73780E+081.33403E+08-8.61356E+081.45173E+06A 18 0.00000E+00-2.75321E+083.89145E+09-4.42173E+06A 20 0.00000E+000.00000E+00-7.38718E+095.85158E+06A 22 0.00000E+000.00000E+000.00000E+000.00000E+00A 24 0.00000E+000.00000E+000.00000E+000.00000E+00A 26 0.00000E+000.00000E+000.00000E+000.00000E+00A 28 0.00000E+000.00000E+000.00000E+000.00000E+00A 30 0.00000E+000.00000E+000.00000E+000.00000E+00

[0101] 렌즈면(surface)S6S7S8S9k-9.80092E+00-2.54512E+00-3.03508E+00-1.98704E+00A42.95358E+00-7.06476E+00-3.42956E+00-1.38189E+00A6-3.67680E+011.28907E+025.57663E+01-3.28104E+01A8-7.11050E+02-2.58740E+03-1.15358E+034.15177E+02A 10 2.53736E+044.68766E+041.3IS4E+04-2.76488E+03A 12 -3.36222E+05-7.07370E+05-9.55908E+041.24387E+04A 14 2.48969E+067.86651E+064.78920E+05-4.01932E+04A 16 -1.06060E+07-5.97263E+07-1.73807E+069.47707E+04A 18 2.40271E+072.96748E+084.65397E+06-1.62593E+05A 20 -2.21992E+07-9.15814E+08-9.19796E+061.99725E+05A 22 0.00000E+001.58572E+091.32269E+07-1.69995E+05A 24 0.00000E+00-1.17458E+09-1.34223E+079.41824E+04A 26 0.00000E+000.00000E+009.08668E+06-2.97045E+04A 28 0.00000E+000.00000E+00-3.67502E+063.46038E+03A 30 0.00000E+000.00000E+006.70494E+052.91518E+02

[0102] FIG. 2 is a graph showing spherical aberration of a lens assembly according to the embodiment of FIG. 1a. FIG. 3 is a graph showing astigmatism of a lens assembly according to the embodiment of FIG. 1a. FIG. 4 is a graph showing distortion of a lens assembly according to the embodiment of FIG. 1a. Referring to FIG. 2, spherical aberration may be a phenomenon in which the focal points of light passing through different portions of a lens (e.g., a chief portion and a marginal portion) are different.

[0103] In Figure 2, the horizontal axis represents the degree of longitudinal spherical aberration, and the vertical axis represents the normalized distance from the center of the optical axis, so that changes in longitudinal spherical aberration according to the wavelength of light can be depicted.

[0104] The longitudinal spherical aberration of the lens assembly (100) can be expressed for light having a wavelength of, for example, approximately 656.3000 nm (nanometer), approximately 587.6000 nm, approximately 546.1000 nm, approximately 486.1000 nm, or approximately 435.8000 nm, respectively. Referring to FIG. 2, it can be confirmed that the longitudinal spherical aberration of the lens assembly (100) according to various embodiments of the present disclosure in the visible light band is limited to approximately +0.025 to approximately -0.025, thereby exhibiting stable optical characteristics.

[0105] Referring to Figure 3, astigmatism may be a phenomenon in which the focal points of light passing through the vertical and horizontal directions are misaligned when the tangential plane (or meridional plane) and the sagittal plane of the lens have different radii.

[0106] The astigmatism of the lens assembly (100) is a result obtained at a wavelength of approximately 587.6000 nm, where the dotted line represents the astigmatism (T) in the tangential direction (e.g., meridional curvature), and the solid line represents the astigmatism (S) in the sagittal direction (e.g., spherical curvature). As can be confirmed through FIG. 3, it can be confirmed that the astigmatism of the lens assembly (100) according to various embodiments of the present disclosure is generally limited to within +0.050 to -0.050, thereby exhibiting stable optical characteristics.

[0107] Referring to Fig. 4, distortion occurs because the optical magnification varies depending on the distance from the optical axis (OI), and the image formed on the actual image plane (e.g., the image plane (img) of Fig. 1a) may appear larger or smaller than the image formed on the theoretical image plane.

[0108] In FIG. 4, the distortion of the lens assembly (100) is a result obtained at a wavelength of approximately 587.6000 nm, and an image captured using the lens assembly (100) may be somewhat distorted at a point deviating from the optical axis (OI). However, such distortion is at a level that may generally appear in a camera module including a lens. According to one embodiment of the present disclosure, the distortion of the lens assembly (100) may provide good optical characteristics as the distortion rate is less than approximately 2.5%.

[0109] FIG. 5 is a schematic diagram illustrating a lens assembly according to an embodiment of the present disclosure. FIG. 6 is a graph illustrating spherical aberration of the lens assembly according to the embodiment of FIG. 5. FIG. 7 is a graph illustrating astigmatism of the lens assembly according to the embodiment of FIG. 5. FIG. 8 is a graph illustrating distortion of the lens assembly according to the embodiment of FIG. 5.

[0110] The description of the lens assembly (100) according to the embodiments described above in FIGS. 1A to 4 may be applied to the lens assemblies (200, 300, 400, 500) of various other embodiments described below. Some of the lens assemblies (200, 300, 400, 500) may have the same lens properties (e.g., angle of view, focal length, autofocus, F-number, or optical zoom), or at least one lens assembly may have one or more lens properties that are different from the lens properties included in the other lens assemblies. The lens assemblies (200, 300, 400, 500) may include a flash, an image sensor (IS), an image stabilizer, a memory, or an image signal processor.

[0111] In describing various embodiments of the present disclosure below, components that can be easily understood through the aforementioned embodiments may be given similar reference numbers or omitted from the drawings. Furthermore, detailed descriptions thereof may be omitted to the extent that they would otherwise be redundant.

[0112] Referring to FIGS. 5 to 8 together, the lens assembly (200) may include four lens(es) (e.g., L1, L2, L3, L4), a filter (F), and an image sensor (IS).

[0113] The lens assembly (200) according to the embodiment of FIGS. 5 to 8, unlike the lens assembly (100) according to the embodiment of FIGS. 1A to 4 described above, can be exemplified by a shape in which the upper side surface (S3) of the first lens (L1) is concave toward the upper side and the subject side surface (S4) of the second lens (L2) is concave toward the subject side. In addition, referring to FIG. 5, the lens assembly (200) may have a first inflection point (P1) formed on the upper side surface (S3) of the first lens (L1), a second inflection point (P2) formed on the upper side surface (S5) of the second lens (L2), a third inflection point (P3) formed on the subject side surface (S6) of the third lens (L3), a fourth inflection point (P4) formed on the subject side surface (S8) of the fourth lens (L4), and a fifth inflection point (P5) formed on the upper side surface (S9) of the fourth lens (L5).

[0114] [Table 4] below may describe various optical data regarding four lenses (e.g., L1, L2, L3, L4) and / or filters (F) included in a lens assembly (200). 'obj' may refer to an object, and 'img' may refer to an imaging surface of an image sensor (IS). 'S1' may refer to an aperture (sto), and 'S2 to S11' may refer to surfaces of a plurality of related lenses (e.g., L1, L2, L3, L4) and / or filters (F). In addition, y radius may refer to a radius of curvature of the lens, Thickness may refer to a thickness or air gap of the lens, Nd may refer to a refractive index of a medium (e.g., lens), and Vd may refer to an Abbe number of the lens. The lens assembly (200) may have an F number (Fno) of approximately 2.07, an angle of view (ANG) of approximately 86.6 degrees, a focal length of approximately 1.22 mm, an image height (ImgH) of an image sensor (IS) of 1.19, and may satisfy the above-described equations (and / or at least one of the above-described equations) while having optical data shown in [Table 4] below.

[0115] Lens surface (surface)Lens surface type (surface type)Radius of curvature (y radius)Thickness (Thickness)Refractive index (Nd)Abbe number (Vd)objSphereinfinity500S1(sto)Sphereinfinity-0.067S2Odd Polynomial0.6620.2391.54400855.91S3Odd Polynomial1.9000.125S4Odd Polynomial-17.2020.1601.67073319.2299S5Odd Polynomial6.8750.071S6Odd Polynomial-0.8780.3301.54400855.91S7Odd Polynomial-0.4310.020S8Odd Polynomial0.4340.1801.54400855.91S9Odd Polynomial0.2710.144S10Sphereinfinity0.1101.51679864.1983S11Sphereinfinity0.400imgSphereinfinity0.000

[0116] The refractive index data in [Table 4] above may represent the refractive index at a wavelength of, for example, 587.6000 nm. [Table 5] and [Table 6] below may describe the aspherical coefficients of the four lenses (e.g., L1, L2, L3, L4) included in the lens assembly.

[0117] Lens surfaceS2S3S4S5k1.96662E+00-1.78455E+019.14117E+01-9.90000E+01A4-8.65479E-01-3.73247E-01-3.58832E+00 1.45606E+00A6-9.38194E+00-2.91677E+012.77314E+01-7.58804E+01A84.11439E+028.77697E+02-2.8F8E+031.14420E+03A 10 -1.34512E+04-2.51498E+049.46706E+04-8.89060E+03A 12 1.94634E+053.75319E+05-1.97689E+061.98549E+04A14 -1.39131E+06-2.97083E+062.38950E+071.61349E+05A 16 3.76380E+069.57172E+06-1.56526E+08-1.20575E+05A 18 0.00000E+000.00000E+004.35246E+082.53248E+05A 20 0.00000E+000.00000E+000.00000E+000.00000E+00A 22 0.00000E+000.00000E+000.00000E+000.00000E+00A 24 0.00000E+000.00000E+000.00000E+000.00000E+00A 26 0.00000E+000.00000E+000.00000E+000.00000E+00A 28 0.00000E+000.00000E+000.00000E+000.00000E+00A 30 0.00000E+000.00000E+000.00000E+000.00000E+00

[0118] 렌즈면(surface)S6S7S8S9k-1.42440E+01-2.89288E+00-1.31906E+01-3.31672E+00A41.94837E+00-1.14095E+01-2.05511E+00-4.79060E+00A6-1.59420E+013.35412E+02-2.64699E+013.70306E+01A8-1.04254E+03-7.84063E+035.37910E+02-2.46401E+02A 10 3.29389E+041.26799E+05-5.41390E+031.IS39E+03A 12 -4.05883E+05-1.40680E+063.74637E+04-5.26859E+03A 14 2.68766E+061.07281E+07-1.84548E+051.58497E+04A 16-1.01321E+07-5.58517E+076.52269E+05-3.55581E+04A 18 2.05172E+071.96536E+08-1.66367E+065.94480E+04A 20 -1.73381E+07-4.57745E+083.06418E+06-7.37769E+04A 22 0.00000E+006.73536E+08-4.03803E+066.72395E+04A 24 0.00000E+00-5.64726E+083.71437E+06-4.39384E+04A 26 0.00000E+002.04536E+08-2.26593E+061.95864E+04A 28 0.00000E+000.00000E+008.24007E+05-5.35446E+03A 30 0.00000E+000.00000E+00-1.35219E+056.78259E+02

[0119] The longitudinal spherical aberration of FIG. 6 can be represented, for example, for light having a wavelength of approximately 656.3000 nm (nanometer), approximately 587.6000 nm, approximately 546.1000 nm, approximately 486.1000 nm, or approximately 435.8000 nm, respectively. The astigmatism of FIG. 7 can represent a result obtained for light having a wavelength of approximately 587.6000 nm. The distortion of FIG. 8 can also represent a result obtained for light having a wavelength of approximately 587.6000 nm. Referring to FIGS. 6 to 8, it can be confirmed that the lens assembly (200) has good spherical aberration, astigmatism, and distortion characteristics. FIG. 9 is a schematic diagram showing a lens assembly according to an embodiment of the present disclosure. FIG. 10 is a graph showing spherical aberration of the lens assembly according to the embodiment of FIG. 9. Fig. 11 is a graph showing astigmatism of a lens assembly according to the embodiment of Fig. 9. Fig. 12 is a graph showing distortion of a lens assembly according to the embodiment of Fig. 9.

[0120] Referring to FIGS. 9 to 12 together, the lens assembly (300) may include four lens(es) (e.g., L1, L2, L3, L4), a filter (F), and an image sensor (IS).

[0121] The lens assembly (300) according to the embodiment of FIGS. 9 to 12 can be exemplified by having the same shape as the lens assembly (100) according to the embodiment of FIGS. 1A to 4 described above, in which the upper side surface (S3) of the first lens (L1) is convex toward the upper side and the subject side surface (S4) of the second lens (L2) is convex toward the subject side. However, referring to FIG. 9, the lens assembly (300) may have a first inflection point (P1) formed on the subject-side surface (S2) of the first lens (L1), a second inflection point (P2) formed on the subject-side surface (S4) of the second lens (L2), a third inflection point (P3) formed on the upper-side surface (S5) of the second lens (L2), a fourth inflection point (P4) formed on the subject-side surface (S6) of the third lens (L3), a fifth inflection point (P5) formed on the upper-side surface (S7) of the third lens (L3), a sixth inflection point (P6) formed on the subject-side surface (S8) of the fourth lens (L4), and a seventh inflection point (P7) formed on the upper-side surface (S9) of the fourth lens (L4).

[0122] [Table 7] below may describe various optical data regarding four lenses (e.g., L1, L2, L3, L4) and / or filters (F) included in a lens assembly (300). 'obj' may refer to an object, and 'img' may refer to an imaging surface of an image sensor (IS). 'S1' may refer to an aperture (sto), and 'S2 to S11' may refer to surfaces of a plurality of related lenses (e.g., L1, L2, L3, L4) and / or filters (F). In addition, y radius may refer to a radius of curvature of the lens, Thickness may refer to a thickness or air gap of the lens, Nd may refer to a refractive index of a medium (e.g., lens), and Vd may refer to an Abbe number of the lens. The lens assembly (300) has an F number (Fno) of approximately 2.47, an angle of view (ANG) of approximately 99.58 degrees, a focal length of approximately 1.0 mm, and an image height (ImgH) of an image sensor (IS) of 1.19, and can satisfy the above-described equations (and / or at least one of the above-described equations) while having optical data shown in [Table 7] below.

[0123] Lens surface (surface)Lens surface type (surface type)Radius of curvature (y radius)Thickness (Thickness)Refractive index (Nd)Abbe number (Vd)objSphereinfinity500S1(sto)Sphereinfinity0.000S2Odd Polynomial3.5860.2551.54400855.91S3Odd Polynomial-0.8840.058S4Odd Polynomial2.5780.1601.67073319.2299S5Odd Polynomial1.2630.111S6Odd Polynomial-0.4870.2821.54400855.91S7Odd Polynomial-0.4900.020S8Odd Polynomial0.3720.2061.54400855.91S9Odd Polynomial0.3880.195S10Sphereinfinity0.1101.51679864.1983S11Sphereinfinity0.340imgSphereinfinity0.000

[0124] The refractive index data in [Table 7] above may represent the refractive index at a wavelength of, for example, 587.6000 nm. [Table 8] and [Table 9] below may describe the aspherical coefficients of four lenses (e.g., L1, L2, L3, L4) included in the lens assembly (300).

[0125] Lens surfaceS2S3S4S5k-9.89858E+011.94312E+001.77736E+01-9.34470E+01A4-3.36543E+00-7.57759E+00-1.11722E+013 .54110E+00A62.81965E+023.04220E+011.35155E+02-1.92875E+02A8-2.78025E+045.33654E+02-5.08979E+034.67434E+03A 10 1.41889E+061.79485E+031.58376E+05-7.97500E+04A 12 -3.99944E+07-5.71910E+05-2.96693E+069.55993E+05A14 5.82210E+081.29378E+073.36485E+07-7.78331E+06A 16 -3.41556E+09-1.25555E+08-2.26157E+084.03825E+07A 18 0.00000E+004.67203E+088.03923E+08-1.19136E+07A 20 0.00000E+000.00000E+00-1.07995E+091.50997E+07A 22 0.00000E+000.00000E+000.00000E+000.00000E+00A 24 0.00000E+000.00000E+000.00000E+000.00000E+00A 26 0.00000E+000.00000E+000.00000E+000.00000E+00A 28 0.00000E+000.00000E+000.00000E+000.00000E+00A 30 0.00000E+000.00000E+000.00000E+000.00000E+00

[0126] 렌즈면(surface)S6S7S8S9k-6.66880E+00-2.88764E+00-2.13152E+00-1.66717E+00A42.26225E+00-3.21042E+00-1.53550E+006.99048E-01A6-5.35054E+01-3.57896E+017.02236E+00-4.05802E+01A82.24583E+021.99915E+03-1.80439E+022.64425E+02A 10 7.44233E+03-5.19582E+043.64213E+02-5.79426E+02A 12 -1.32103E+058.23137E+051.88278E+04-2.25195E+03A 14 1.04927E+06-8.36147E+06-2.32573E+052.20754E+04A 16-4.37080E+065.59307E+071.41722E+06-8.62345E+04A 18 8.66067E+06-2.45887E+08-5.42305E+062.10376E+05A 20 -5.58211E+066.87772E+081.39714E+07-3.50629E+05A 22 0.00000E+00-1.11676E+09-2.46991E+074.07710E+05A 24 0.00000E+008.04989E+082.96313E+07-3.26537E+05A 26 0.00000E+000.00000E+00-2.30923E+071.71965E+05A 28 0.00000E+000.00000E+001.05556E+07-5.36148E+04A 30 0.00000E+000.00000E+00-2.14894E+067.49406E+03

[0127] The longitudinal spherical aberration of FIG. 10 can be represented, for example, for light having a wavelength of approximately 656.3000 nm (nanometer), approximately 587.6000 nm, approximately 546.1000 nm, approximately 486.1000 nm, or approximately 435.8000 nm, respectively. The astigmatism of FIG. 11 can represent a result obtained for light having a wavelength of approximately 587.6000 nm. The distortion of FIG. 12 can also represent a result obtained for light having a wavelength of approximately 587.6000 nm. Referring to FIGS. 10 to 12, it can be confirmed that the lens assembly (300) has good spherical aberration, astigmatism, and distortion characteristics. FIG. 13 is a schematic diagram showing a lens assembly according to an embodiment of the present disclosure. FIG. 14 is a graph showing spherical aberration of the lens assembly according to the embodiment of FIG. 13. FIG. 15 is a graph showing astigmatism of a lens assembly according to the embodiment of FIG. 13. FIG. 16 is a graph showing distortion of a lens assembly according to the embodiment of FIG. 13.

[0128] Referring to FIGS. 13 to 16 together, the lens assembly (400) may include four lens(es) (e.g., L1, L2, L3, L4), a filter (F), and an image sensor (IS).

[0129] The lens assembly (400) according to the embodiment of FIGS. 13 to 16 may be exemplified by having the same shape as the lens assembly (100) according to the embodiment of FIGS. 1A to 4 described above, in which the upper side surface (S2) of the first lens (L1) is convex toward the upper side and the subject side surface (S4) of the second lens (L2) is convex toward the subject side. However, referring to FIG. 13, the lens assembly (400) has an aperture (S3) disposed between the first lens (L1) and the second lens (L2), a first inflection point (P1) on the subject-side surface (S1) of the first lens (L1), a second inflection point (P2) on the subject-side surface (S4) of the second lens (L2), a third inflection point (P3) on the image-side surface (S5) of the second lens (L2), a fourth inflection point (P4) on the subject-side surface (S6) of the third lens (L3), a fifth inflection point (P5) on the image-side surface (S7) of the third lens (L3), a sixth inflection point (P6) on the subject-side surface (S8) of the fourth lens (L4), and a seventh inflection point (P6) on the image-side surface (S9) of the fourth lens (L4). An inflection point (P7) may have been formed.

[0130] [Table 10] below may describe various optical data regarding four lenses (e.g., L1, L2, L3, L4) and / or filters (F) included in a lens assembly (400). 'obj' may refer to an object, and 'img' may refer to an imaging surface of an image sensor (IS). 'S1~S2, S4~S11' may refer to surfaces of a plurality of related lenses (e.g., L1, L2, L3, L4) and / or filters (F). 'S3' may refer to an aperture (sto). In addition, y radius may refer to a radius of curvature of a lens, Thickness may refer to a thickness or air gap of a lens, Nd may refer to a refractive index of a medium (e.g., a lens), and Vd may refer to an Abbe number of a lens. The lens assembly (400) may have an F number (Fno) of approximately 2.48, an angle of view (ANG) of approximately 99.56 degrees, a focal length of approximately 0.99 mm, an image height (ImgH) of an image sensor (IS) of 1.19, and may satisfy the above-described equations (and / or at least one of the above-described equations) while having optical data shown in [Table 10] below.

[0131] Lens surface (surface)Lens surface type (surface type)Radius of curvature (y radius)Thickness (Thickness)Refractive index (Nd)Abbe number (Vd)objSphereinfinity500S1Odd Polynomial6.42E+000.2571.54400855.91S2Odd Polynomial-0.9910.000S3(sto)Sphereinfinity0.106S4Odd Polynomial10.5680.1601.67073319.2299S5Odd Polynomial1.6280.081S6Odd Polynomial-0.7670.3151.54400855.91S7Odd Polynomial-0.6800.020S8Odd Polynomial0.3100.1901.54400855.91S9Odd Polynomial0.3510.239S10Sphereinfinity0.1101.51679864.1983S11Sphereinfinity0.339imgSphereinfinity0.000

[0132] The refractive index data of the above [Table 10] may represent the refractive index at a wavelength of, for example, 587.6000 nm. The following [Table 11] and [Table 12] may describe the aspherical coefficients of four lenses (e.g., L1, L2, L3, L4) included in the lens assembly (400).

[0133] Lens surfaceS1S2S4S5k-9.90000E+01-1.82999E+019.90000E+01-9.90000E+01A4-1.24275E+00-3.20323E+00-5.43294E+003 .47579E+00A62.16902E+01-5.16143E+02-1.16804E+02-2.41367E+02A8-1.71457E+038.62831E+041.16477E+047.74956E+03A 10 5.13788E+04-8.84192E+06-5.68295E+05-1.63248E+05A 12 -8.35349E+056.20337E+081.57037E+072.26956E+06A14 6.91601E+06-3.13498E+10-2.61392E+08-2.06191E+07A 16 -2.30613E+071.16912E+122.57516E+091.16985E+07A 18 0.00000E+00-3.23040E+13-1.38000E+10-3.75637E+07A 20 0.00000E+006.54796E+143.09968E+105.20471E+07A 22 0.00000E+00-9.53680E+150.00000E+000.00000E+00A 24 0.00000E+009.64900E+160.00000E+000.00000E+00A 26 0.00000E+00-6.40585E+170.00000E+000.00000E+00A 28 0.00000E+002.50002E+180.00000E+000.00000E+00A 30 0.00000E+00-4.33569E+180.00000E+000.00000E+00

[0134] 렌즈면(surface)S6S7S8S9k-2.38180E+01-2.26558E+00-2.57523E+00-1.85931E+00A42.64200E+00-6.54477E+00-1.64515E+004.81641E+00A6-7.65499E+01-2.21279E+014.48473E+01-1.26248E+02A88.19505E+023.73641E+03-1.21980E+031.22524E+03A 10 7.62399E+03-1.10636E+051.51006E+04-7.35351E+03A 12 -2.18207E+051.83878E+06-1.09456E+053.04716E+04A 14 1.92332E+06-1.92229E+075.24128E+05-9.12768E+04A 16-8.70403E+061.30758E+08-1.74657E+062.01937E+05A 18 2.05565E+07-5.76547E+084.15088E+06-3.32301E+05A 20 -2.02341E+071.58937E+09-7.08837E+064.04976E+05A 22 0.00000E+00-2.49501E+098.63612E+06-3.59740E+05A 24 0.00000E+001.70849E+09-7.32690E+062.25791E+05A 26 0.00000E+000.00000E+004.11305E+06-9.46424E+04A 28 0.00000E+000.00000E+00-1.37327E+062.37167E+04A 30 0.00000E+000.00000E+002.06475E+05-2.68189E+03

[0135] The longitudinal spherical aberration of FIG. 14 can be represented, for example, for light having a wavelength of approximately 656.3000 nm (nanometer), approximately 587.6000 nm, approximately 546.1000 nm, approximately 486.1000 nm, or approximately 435.8000 nm, respectively. The astigmatism of FIG. 15 can represent a result obtained for light having a wavelength of approximately 587.6000 nm. The distortion of FIG. 16 can also represent a result obtained for light having a wavelength of approximately 587.6000 nm. Referring to FIGS. 14 to 16, it can be confirmed that the lens assembly (400) has good spherical aberration, astigmatism, and distortion characteristics. FIG. 17 is a schematic diagram showing a lens assembly according to an embodiment of the present disclosure. FIG. 18 is a graph showing spherical aberration of the lens assembly according to the embodiment of FIG. 17. FIG. 19 is a graph showing astigmatism of a lens assembly according to the embodiment of FIG. 17. FIG. 20 is a graph showing distortion of a lens assembly according to the embodiment of FIG. 17.

[0136] Referring to FIGS. 17 to 20 together, the lens assembly (500) may include four lens(es) (e.g., L1, L2, L3, L4), a filter (F), and an image sensor (IS).

[0137] The lens assembly (500) according to the embodiment of FIGS. 17 to 20 may have, as an example, a shape in which the upper side surface (S3) of the first lens (L1) is convex toward the upper side and the subject-side surface (S4) of the second lens (L2) is convex toward the subject side, similar to the lens assembly (100) according to the embodiment of FIGS. 1A to 4 described above. However, referring to FIG. 17, the lens assembly (500) may have a first inflection point (P1) formed on the subject-side surface (S2) of the first lens (L1), a second inflection point (P2) formed on the subject-side surface (S4) of the second lens (L2), a third inflection point (P3) formed on the upper-side surface (S5) of the second lens (L2), a fourth inflection point (P4) formed on the subject-side surface (S6) of the third lens (L3), a fifth inflection point (P5) formed on the subject-side surface (S8) of the fourth lens (L4), and a sixth inflection point (P6) formed on the upper-side surface (S9) of the fourth lens (L4).

[0138] [Table 13] below may describe various optical data regarding four lenses (e.g., L1, L2, L3, L4) and / or filters (F) included in a lens assembly (500). 'obj' may refer to an object, and 'img' may refer to an imaging surface of an image sensor (IS). 'S1' may refer to an aperture (sto), and 'S2 to S11' may refer to surfaces of a plurality of related lenses (e.g., L1, L2, L3, L4) and / or filters (F). In addition, y radius may refer to a radius of curvature of the lens, Thickness may refer to a thickness or air gap of the lens, Nd may refer to a refractive index of a medium (e.g., lens), and Vd may refer to an Abbe number of the lens. The lens assembly (500) may have an F number (Fno) of approximately 2.28, an angle of view (ANG) of approximately 99.6 degrees, a focal length of approximately 0.99 mm, an image height (ImgH) of an image sensor (IS) of 1.19, and may satisfy the above-described equations (and / or at least one of the above-described equations) while having optical data shown in [Table 13] below.

[0139] Lens surface (surface)Lens surface type (surface type)Radius of curvature (y radius)Thickness (Thickness)Refractive index (Nd)Abbe number (Vd)objSphereinfinity500S1(sto)Sphereinfinity0.000S2Odd Polynomial2.8660.2561.54400855.91S3Odd Polynomial-0.9960.098S4Odd Polynomial2.5380.1501.67073319.2299S5Odd Polynomial0.9670.074S6Odd Polynomial-0.7290.3391.54400855.91S7Odd Polynomial-0.5410.020S8Odd Polynomial0.3190.1801.54400855.91S9Odd Polynomial0.3070.183S10Sphereinfinity0.1101.51679864.1983S11Sphereinfinity0.340imgSphereinfinity0.000

[0140] The refractive index data of the above [Table 13] may represent the refractive index at a wavelength of, for example, 587.6000 nm. The following [Table 14] and [Table 15] may describe the aspherical coefficients of four lenses (e.g., L1, L2, L3, L4) included in the lens assembly (500).

[0141] Lens surfaceS2S3S4S5k-3.74540E+01-4.04548E-01-7.82996E+01-6.49743E+01A4-1.84431E+00-6.00893E+00-1.04332E+01 6.46736E+00A63.12462E+00-8.10241E+01-9.33368E+01-5.95854E+02A8-4.12189E+028.80895E+038.43168E+032.91273E+04A 10 -8.60325E+03-3.70976E+05-3.14167E+05-1.15979E+06A 12 6.15269E+058.63903E+066.96270E+063.54384E+07A14 -1.17644E+07-1.15145E+08-9.60229E+07-7.95261E+08A 16 7.53501E+078.19137E+088.02452E+071.28987E+10A 18 0.00000E+00-2.40947E+09-3.72735E+07-1.50374E+11A 20 0.00000E+000.00000E+007.39953E+091.24925E+12A 22 0.00000E+000.00000E+000.00000E+00-7.25046E+12A 24 0.00000E+000.00000E+000.00000E+002.82729E+13A 26 0.00000E+000.00000E+000.00000E+00-6.88007E+13A 28 0.00000E+000.00000E+000.00000E+008.97747E+13A 30 0.00000E+000.00000E+000.00000E+00-4.19351E+13

[0142] 렌즈면(surface)S6S7S8S9k-8.01627E+00-1.53016E+00-3.26407E+00-1.91987E+00A44.98753E+00-7.90727E+00-1.16121E+002.05002E+00A6-7.81341E+001.06778E+023.72070E+01-1.13177E+02A8-9.89092E+03-5.00557E+02-1.55768E+031.31775E+03A 10 5.39812E+05-3.33917E+042.29989E+04-9.17294E+03A 12 -1.80351E+071.20151E+06-1.95133E+054.41116E+04A 14 4.28996E+08-2.40113E+071.10229E+06-1.54039E+05A 16-7.35653E+093.37753E+08-4.42028E+063.97712E+05A 18 9.01769E+10-3.48165E+091.29619E+07-7.60776E+05A 20 -7.82357E+112.62764E+10-2.80204E+071.06927E+06A 22 4.73980E+12-1.43012E+114.42138E+07-1.08445E+06A 24 -1.95590E+135.45398E+11-4.94590E+077.68854E+05A 26 5.23275E+13-1.38116E+123.70638E+07-3.60292E+05A 28 -8.17820E+132.08290E+12-1.66415E+079.99849E+04A 30 5.66657E+13-1.41304E+123.37603E+06-1.24148E+04

[0143] The longitudinal spherical aberration of Fig. 18 can be represented, for example, for light having a wavelength of approximately 656.3000 nm (nanometer), approximately 587.6000 nm, approximately 546.1000 nm, approximately 486.1000 nm, or approximately 435.8000 nm, respectively. The astigmatism of Fig. 19 can represent the result obtained for light having a wavelength of approximately 587.6000 nm. The distortion of Fig. 20 can also represent the result obtained for light having a wavelength of approximately 587.6000 nm. Referring to FIGS. 18 to 20, it can be confirmed that the lens assembly (500) has good spherical aberration, astigmatism, and distortion characteristics. In the above-described embodiments, various data on the lens and peripheral components can be confirmed in the lens assemblies (e.g., 100, 200, 300, 400, 500) and / or electronic devices including the same. Such data can satisfy the above-described conditions, for example, the results of [Equations 1 to 6] as shown in [Table 16] below.

[0144] Example 1 Example 2 Example 3 Example 4 Example 5 Formula 10.0360.0410.0350.0360.035 Formula 295.986.699.699.699.6 Formula 336.6836.6836.6836.6836.6836.68 Formula 41.5441.5441.5441.5441.544 Formula 51.3010.7073.4153.0261.690 Formula 61.4531.4931.4581.5251.468

[0145] In the above [Table 16], 'Example 1' may refer to the lens assembly (100) illustrated in FIG. 1a, 'Example 2' may refer to the lens assembly (200) illustrated in FIG. 5, 'Example 3' may refer to the lens assembly (300) illustrated in FIG. 9, 'Example 4' may refer to the lens assembly (400) illustrated in FIG. 13, and 'Example 5' may refer to the lens assembly (500) illustrated in FIG. 17. The lens assemblies (100, 200, 300, 400, 500) according to the various embodiments described above may be mounted and used in an electronic device (e.g., a laptop computer). The lens assemblies (100, 200, 300, 400, 500) may be assembled as one module (e.g., a camera module) together with an image sensor (IS), and may be mounted on a bezel of the electronic device in a state in which they are assembled as a camera module. In addition to an image sensor (IS), an electronic device (e.g., a laptop computer) may further include an application processor (AP), and through the application processor (AP), a plurality of hardware or software components connected to the application processor (AP) may be controlled by, for example, running an operating system or an application program, and various data processing and calculations may be performed. For example, the application processor (AP) may further include a graphics processing unit (GPU) and / or an image signal processor. When the application processor (AP) includes an image signal processor, the image (or video) acquired by the image sensor (IS) may be stored or output using the application processor (AP).

[0146] FIG. 21 is a block diagram of an electronic device (2101) (e.g., an optical device) within a network environment (2100) according to various embodiments. Referring to FIG. 21, in the network environment (2100), the electronic device (2101) (e.g., an optical device) may communicate with an electronic device (2102) via a first network (2198) (e.g., a short-range wireless communication network), or may communicate with at least one of an electronic device (2104) or a server (2108) via a second network (2199) (e.g., a long-range wireless communication network). In one embodiment, the electronic device (2101) may communicate with the electronic device (2104) via the server (2108). According to one embodiment, the electronic device (2101) may include a processor (2120), a memory (2130), an input module (2150), an audio output module (2155), a display module (2160), an audio module (2170), a sensor module (2176), an interface (2177), a connection terminal (2178), a haptic module (2179), a camera module (2180), a power management module (2188), a battery (2189), a communication module (2190), a subscriber identification module (2196), or an antenna module (2197). In some embodiments, the electronic device (2101) may omit at least one of these components (e.g., the display module (2160) or the camera module (2180)), or may have one or more other components added. In some embodiments, some of these components (e.g., sensor module (2176), camera module (2180), or antenna module (2197)) may be integrated into a single component (e.g., display module (2160)).

[0147] The processor (2120) may, for example, execute software (e.g., a program (2140)) to control at least one other component (e.g., a hardware or software component) of the electronic device (2101) connected to the processor (2120) and perform various data processing or operations. According to one embodiment, as at least a part of the data processing or operations, the processor (2120) may store commands or data received from other components (e.g., a sensor module (2176) or a communication module (2190)) in a volatile memory (2132), process the commands or data stored in the volatile memory (2132), and store result data in a non-volatile memory (2134). According to one embodiment, the processor (2120) may include a main processor (2121) (e.g., a central processing unit or an application processor), or an auxiliary processor (2123) (e.g., a graphics processing unit, a neural processing unit (NPU), an image signal processor, a sensor hub processor, or a communication processor) that can operate independently or together with the main processor (2121). For example, when the electronic device (2101) includes the main processor (2121) and the auxiliary processor (2123), the auxiliary processor (2123) may be configured to use less power than the main processor (2121) or to be specialized for a given function. The auxiliary processor (2123) may be implemented separately from the main processor (2121) or as a part thereof.

[0148] The auxiliary processor (2123) may control at least a portion of functions or states associated with at least one component (e.g., the display module (2160), the sensor module (2176), or the communication module (2190)) of the electronic device (2101), for example, on behalf of the main processor (2121) while the main processor (2121) is in an inactive (e.g., sleep) state, or together with the main processor (2121) while the main processor (2121) is in an active (e.g., application execution) state. In one embodiment, the auxiliary processor (2123) (e.g., an image signal processor or a communication processor) may be implemented as a part of another functionally related component (e.g., a camera module (2180) or a communication module (2190)). In one embodiment, the auxiliary processor (2123) (e.g., a neural network processing unit) may include a hardware structure specialized for processing artificial intelligence models. The artificial intelligence models may be generated through machine learning. This learning can be performed, for example, on the electronic device (2101) itself where the artificial intelligence model is executed, or can be performed through a separate server (e.g., server (2108)). The learning algorithm can include, for example, supervised learning, unsupervised learning, semi-supervised learning, or reinforcement learning, but is not limited to the examples described above. The artificial intelligence model can include multiple artificial neural network layers.The artificial neural network may be one of a deep neural network (DNN), a convolutional neural network (CNN), a recurrent neural network (RNN), a restricted Boltzmann machine (RBM), a deep belief network (DBN), a bidirectional recurrent deep neural network (BRDNN), a deep Q-network, or a combination of two or more of the above, but is not limited to the examples described above. In addition to, or alternatively to, a hardware structure, an artificial intelligence model may include a software structure.

[0149] The memory (2130) can store various data used by at least one component (e.g., the processor (2120) or the sensor module (2176)) of the electronic device (2101). The data can include, for example, software (e.g., the program (2140)) and input data or output data for commands related thereto. The memory (2130) can include volatile memory (2132) or non-volatile memory (2134).

[0150] The program (2140) may be stored as software in memory (2130) and may include, for example, an operating system (2142), middleware (2144), or an application (2146).

[0151] The input module (2150) can receive commands or data to be used in a component of the electronic device (2101) (e.g., a processor (2120)) from an external source (e.g., a user) of the electronic device (2101). The input device (2150) can include, for example, a microphone, a mouse, a keyboard, keys (e.g., buttons), or a digital pen (e.g., a stylus pen).

[0152] The audio output module (2155) can output audio signals to the outside of the electronic device (2101). The audio output module (2155) can include, for example, a speaker or a receiver. The speaker can be used for general purposes, such as multimedia playback or recording playback. The receiver can be used to receive incoming calls. In one embodiment, the receiver can be implemented separately from the speaker or as part of the speaker.

[0153] The display module (2160) can visually provide information to an external party (e.g., a user) of the electronic device (2101). The display module (2160) may include, for example, a display, a holographic device, or a projector, and a control circuit for controlling the device. In one embodiment, the display module (2160) may include a touch sensor configured to detect a touch, or a pressure sensor configured to measure the intensity of a force generated by the touch.

[0154] The audio module (2170) can convert sound into an electrical signal, or vice versa. According to one embodiment, the audio module (2170) can acquire sound through the input module (2150), output sound through the sound output module (2155), or an external electronic device (e.g., electronic device (2102)) (e.g., speaker or headphone) directly or wirelessly connected to the electronic device (2101).

[0155] The sensor module (2176) can detect the operating status (e.g., power or temperature) of the electronic device (2101) or the external environmental status (e.g., user status) and generate an electrical signal or data value corresponding to the detected status. According to one embodiment, the sensor module (2176) can include, for example, a gesture sensor, a gyro sensor, a barometric pressure sensor, a magnetic sensor, an acceleration sensor, a grip sensor, a proximity sensor, a color sensor, an IR (infrared) sensor, a biometric sensor, a temperature sensor, a humidity sensor, or an illuminance sensor.

[0156] The interface (2177) may support one or more designated protocols that may be used to directly or wirelessly connect the electronic device (2101) with an external electronic device (e.g., the electronic device (2102)). In one embodiment, the interface (2177) may include, for example, a high definition multimedia interface (HDMI), a universal serial bus (USB) interface, an SD card interface, or an audio interface.

[0157] The connection terminal (2178) may include a connector through which the electronic device (2101) may be physically connected to an external electronic device (e.g., the electronic device (2102)). In one embodiment, the connection terminal (2178) may include, for example, an HDMI connector, a USB connector, an SD card connector, or an audio connector (e.g., a headphone connector).

[0158] The haptic module (2179) can convert electrical signals into mechanical stimuli (e.g., vibration or movement) or electrical stimuli that a user can perceive through tactile or kinesthetic sensations. In one embodiment, the haptic module (2179) may include, for example, a motor, a piezoelectric element, or an electrical stimulation device.

[0159] The camera module (2180) can capture still images and videos. In one embodiment, the camera module (2180) may include one or more lenses, image sensors, image signal processors, or flashes.

[0160] The power management module (2188) can manage power supplied to the electronic device (2101). According to one embodiment, the power management module (2188) can be implemented as, for example, at least a part of a power management integrated circuit (PMIC).

[0161] A battery (2189) may power at least one component of the electronic device (2101). In one embodiment, the battery (2189) may include, for example, a non-rechargeable primary battery, a rechargeable secondary battery, or a fuel cell.

[0162] The communication module (2190) may support the establishment of a direct (e.g., wired) communication channel or a wireless communication channel between the electronic device (2101) and an external electronic device (e.g., electronic device (2102), electronic device (2104), or server (2108)), and the performance of communication through the established communication channel. The communication module (2190) may operate independently from the processor (2120) (e.g., application processor) and may include one or more communication processors that support direct (e.g., wired) communication or wireless communication. According to one embodiment, the communication module (2190) may include a wireless communication module (2192) (e.g., a cellular communication module, a short-range wireless communication module, or a global navigation satellite system (GNSS) communication module) or a wired communication module (2194) (e.g., a local area network (LAN) communication module, or a power line communication module). Any of these communication modules may communicate with an external electronic device (2104) via a first network (2198) (e.g., a short-range communication network such as Bluetooth, wireless fidelity (WiFi) direct, or infrared data association (IrDA)) or a second network (2199) (e.g., a long-range communication network such as a legacy cellular network, a 5G network, a next-generation communication network, the Internet, or a computer network (e.g., a LAN or WAN)). These various types of communication modules may be integrated into a single component (e.g., a single chip) or implemented as multiple separate components (e.g., multiple chips). The wireless communication module (2192) may use subscriber information (e.g., an international mobile subscriber identity (IMSI)) stored in the subscriber identification module (2196) to verify or authenticate the electronic device (2101) within a communication network such as the first network (2198) or the second network (2199).

[0163] The wireless communication module (2192) can support 5G networks and next-generation communication technologies following the 4G network, such as NR access technology (new radio access technology). NR access technology can support high-speed transmission of high-capacity data (eMBB (enhanced mobile broadband)), minimizing terminal power and connecting multiple terminals (mMTC (massive machine type communications)), or high reliability and low latency communications (URLLC (ultra-reliable and low-latency communications)). The wireless communication module (2192) can support, for example, a high-frequency band (e.g., mmWave band) to achieve a high data transmission rate. The wireless communication module (2192) may support various technologies for securing performance in a high-frequency band, such as beamforming, massive multiple-input and multiple-output (MIMO), full dimensional MIMO (FD-MIMO), array antenna, analog beam-forming, or large scale antenna. The wireless communication module (2192) may support various requirements specified in the electronic device (2101), an external electronic device (e.g., the electronic device (2104)), or a network system (e.g., the second network (2199)). According to one embodiment, the wireless communication module (2192) may support a peak data rate (e.g., 20 Gbps or more) for eMBB realization, a loss coverage (e.g., 164 dB or less) for mMTC realization, or a U-plane latency (e.g., 0.5 ms or less for downlink (DL) and uplink (UL), or 1 ms or less for round trip) for URLLC realization.

[0164] The antenna module (2197) can transmit or receive signals or power to or from an external device (e.g., an external electronic device). In one embodiment, the antenna module (2197) may include one antenna including a radiator formed of a conductor or a conductive pattern formed on a substrate (e.g., a PCB). In one embodiment, the antenna module (2197) may include a plurality of antennas (e.g., an array antenna). In this case, at least one antenna suitable for a communication method used in a communication network, such as the first network (2198) or the second network (2199), may be selected from the plurality of antennas by, for example, the communication module (2190). A signal or power may be transmitted or received between the communication module (2190) and the external electronic device via the at least one selected antenna. In some embodiments, in addition to the radiator, another component (e.g., a radio frequency integrated circuit (RFIC)) may be additionally formed as a part of the antenna module (2197).

[0165] According to various embodiments, the antenna module (2197) may form a mmWave antenna module. In one embodiment, the mmWave antenna module may include a printed circuit board, an RFIC disposed on or adjacent a first side (e.g., a bottom side) of the printed circuit board and capable of supporting a designated high frequency band (e.g., a mmWave band), and a plurality of antennas (e.g., an array antenna) disposed on or adjacent a second side (e.g., a top side or a side side) of the printed circuit board and capable of transmitting or receiving signals in the designated high frequency band.

[0166] At least some of the above components can be interconnected and exchange signals (e.g., commands or data) with each other via a communication method between peripheral devices (e.g., a bus, GPIO (general purpose input and output), SPI (serial peripheral interface), or MIPI (mobile industry processor interface)).

[0167] According to one embodiment, commands or data may be transmitted or received between the electronic device (2101) and an external electronic device (2104) via a server (2108) connected to a second network (2199). Each of the external electronic devices (2102, 2104) may be the same or a different type of device as the electronic device (2101). According to one embodiment, all or part of the operations executed in the electronic device (2101) may be executed in one or more of the external electronic devices (2102, 2104, or 2108). For example, when the electronic device (2101) is to perform a certain function or service automatically or in response to a request from a user or another device, the electronic device (2101) may, instead of or in addition to executing the function or service itself, request one or more external electronic devices to perform the function or at least a part of the service. One or more external electronic devices that receive the request may execute at least a portion of the requested function or service, or an additional function or service related to the request, and transmit the result of the execution to the electronic device (2101). The electronic device (2101) may process the result as is or additionally and provide it as at least a portion of a response to the request. For this purpose, cloud computing, distributed computing, mobile edge computing (MEC), or client-server computing technologies may be utilized, for example.

[0168] The electronic device (2101) can provide ultra-low latency services, for example, using distributed computing or mobile edge computing. In one embodiment, the external electronic device (2104) may include an Internet of Things (IoT) device. The server (2108) may be an intelligent server utilizing machine learning and / or a neural network. According to one embodiment, the external electronic device (2104) or the server (2108) may be included in a second network (2199). The electronic device (2101) may be applied to intelligent services (e.g., smart homes, smart cities, smart cars, or healthcare) based on 5G communication technology and IoT-related technology.

[0169] FIG. 22 is a block diagram (2200) illustrating a camera module (2280) according to various embodiments. Referring to FIG. 22, the camera module (2280) may include a lens assembly (2210) (e.g., the lens assembly (100) of FIG. 1A, the lens assembly (200) of FIG. 5, the lens assembly (300) of FIG. 9, the lens assembly (400) of FIG. 13, and the lens assembly (500) of FIG. 17), a flash (2220), an image sensor (2230) (e.g., the image sensor (IS) of FIGS. 1A, 6, and 10), an image stabilizer (2240), a memory (2250) (e.g., a buffer memory) (e.g., the memory (2130) of FIG. 21), or an image signal processor (2260). The lens assembly (2210) may collect light emitted from a subject that is a target of image capturing. The lens assembly (2210) may include one or more lenses. In one embodiment, the camera module (2280) may include a plurality of lens assemblies (2210). In this case, the camera module (2280) may form, for example, a dual camera, a 360-degree camera, or a spherical camera. Some of the plurality of lens assemblies (2210) may have the same lens properties (e.g., angle of view, focal length, autofocus, F-number (Fno), or optical zoom), or at least one lens assembly may have one or more lens properties that are different from the lens properties of the other lens assemblies. The lens assembly (2210) may include, for example, a wide-angle lens or a telephoto lens.

[0170] The flash (2220) can emit light used to enhance light emitted or reflected from a subject. According to one embodiment, the flash (2220) can include one or more light-emitting diodes (e.g., red-green-blue (RGB) LED, white LED, infrared LED, or ultraviolet LED) or a xenon lamp. The image sensor (2230) can acquire an image corresponding to the subject by converting light emitted or reflected from the subject and transmitted through the lens assembly (2210) into an electrical signal. According to one embodiment, the image sensor (2230) can include one image sensor selected from among image sensors having different properties, such as an RGB sensor, a black and white (BW) sensor, an IR sensor, or a UV sensor, a plurality of image sensors having the same property, or a plurality of image sensors having different properties. Each image sensor included in the image sensor (2230) may be implemented using, for example, a CCD (charged coupled device) sensor or a CMOS (complementary metal oxide semiconductor) sensor.

[0171] The image stabilizer (2240) can move at least one lens or image sensor (2230) included in the lens assembly (2210) in a specific direction or control the operating characteristics of the image sensor (2230) (e.g., adjusting the read-out timing, etc.) in response to the movement of the camera module (2280) or the electronic device (2101) including the same. This allows compensating for at least some of the negative effects of the movement on the captured image. In one embodiment, the image stabilizer (2240) can detect such movement of the camera module (2280) or the electronic device (2101) by using a gyro sensor (not shown) or an acceleration sensor (not shown) disposed inside or outside the camera module (2280). According to one embodiment, the image stabilizer (2240) may be implemented as, for example, an optical image stabilizer. The memory (2250) may temporarily store at least a portion of the image acquired through the image sensor (2230) for the next image processing task. For example, when image acquisition is delayed due to a shutter or a plurality of images are acquired at high speed, the acquired original image (e.g., a Bayer-patterned image or a high-resolution image) may be stored in the memory (2250), and a corresponding copy image (e.g., a low-resolution image) may be previewed through the display module (2160). Thereafter, when a specified condition is satisfied (e.g., a user input or a system command), at least a portion of the original image stored in the memory (2250) may be acquired and processed by, for example, the image signal processor (2260). According to one embodiment, the memory (2250) may be configured as at least a portion of the memory (2230), or as a separate memory that operates independently therefrom.

[0172] The image signal processor (2260) can perform one or more image processing operations on an image acquired through an image sensor (2230) or an image stored in a memory (2250). The one or more image processing operations may include, for example, depth map generation, 3D modeling, panorama generation, feature extraction, image synthesis, or image compensation (e.g., noise reduction, resolution adjustment, brightness adjustment, blurring, sharpening, or softening). Additionally or alternatively, the image signal processor (2260) may perform control (e.g., exposure time control, read-out timing control, etc.) on at least one of the components included in the camera module (2280) (e.g., image sensor (2230)). The image processed by the image signal processor (2260) may be stored back in the memory (2250) for further processing or provided to an external component of the camera module (2280) (e.g., memory (2130), display module (2160), electronic device (2102), electronic device (2104), or server (2108)). According to one embodiment, the image signal The processor (2260) may be configured as at least a part of the processor (2120), or may be configured as a separate processor that operates independently of the processor (2120). If the image signal processor (2260) is configured as a separate processor from the processor (2120), at least one image processed by the image signal processor (2260) may be displayed through the display module (2260) as is or after undergoing additional image processing by the processor (2220).

[0173] According to one embodiment, the electronic device (2101) may include a plurality of camera modules (2280), each having different properties or functions. In this case, for example, at least one of the plurality of camera modules (2280) may be a wide-angle camera, and at least another may be a telephoto camera. Similarly, at least one of the plurality of camera modules (2280) may be a front camera, and at least another may be a rear camera.

[0174] Electronic devices according to various embodiments of the present disclosure may take various forms. Electronic devices may include, for example, portable communication devices (e.g., smartphones), computer devices, portable multimedia devices, portable medical devices, cameras, wearable devices, or home appliances. Electronic devices according to embodiments of the present disclosure are not limited to the aforementioned devices.

[0175] The various embodiments of the present disclosure and the terminology used therein are not intended to limit the technical features described in the present disclosure to specific embodiments, but should be understood to include various modifications, equivalents, or substitutes of the embodiments. In connection with the description of the drawings, similar reference numerals may be used for similar or related components. The singular form of a noun corresponding to an item may include one or more of the items, unless the context clearly indicates otherwise. In the present disclosure, each of the phrases "A or B," "at least one of A and B," "at least one of A or B," "A, B, or C," "at least one of A, B, and C," and "at least one of A, B, or C" can include any one of the items listed together in the corresponding phrase, or all possible combinations thereof. Terms such as "first," "second," or "first" or "second" may be used merely to distinguish one component from another, and do not limit the components in any other respect (e.g., importance or order). When a component (e.g., a first component) is referred to as "coupled" or "connected" to another (e.g., a second component), with or without the terms "functionally" or "communicatively," it means that the component can be connected to the other component directly (e.g., wired), wirelessly, or through a third component.

[0176] In various embodiments of the present disclosure, the term "module" may include a unit implemented in hardware, software, or firmware, and may be used interchangeably with terms such as logic, logic block, component, or circuit. A module may be an integral component, or a minimum unit or part of such a component that performs one or more functions. For example, according to one embodiment, a module may be implemented in the form of an application-specific integrated circuit (ASIC).

[0177] Various embodiments of the present disclosure may be implemented as software (e.g., a program (2140)) including one or more commands stored in a storage medium (e.g., an internal memory (2136) or an external memory (2138)) readable by a machine (e.g., an electronic device (2101)). For example, a processor (e.g., a processor (2120)) of the machine (e.g., an electronic device (2101)) may call at least one command among the one or more commands stored from the storage medium and execute it. This enables the machine to operate to perform at least one function according to the at least one command called. The one or more commands may include code generated by a compiler or code executable by an interpreter. The machine-readable storage medium may be provided in the form of a non-transitory storage medium. Here, 'non-transitory' simply means that the storage medium is a tangible device and does not contain signals (e.g., electromagnetic waves), and the term does not distinguish between cases where data is stored semi-permanently or temporarily on the storage medium.

[0178] According to one embodiment, the method according to various embodiments of the present disclosure may be provided as a computer program product. The computer program product may be traded between sellers and buyers as a product. The computer program product may be distributed in the form of a device-readable storage medium (e.g., compact disc read-only memory (CD-ROM)) or may be provided through an application store (e.g., Play Store). TM ) or directly between two user devices (e.g., smartphones), online distribution (e.g., downloading or uploading). In the case of online distribution, at least a portion of the computer program product may be at least temporarily stored or temporarily created in a machine-readable storage medium, such as the memory of a manufacturer's server, an application store's server, or an intermediary server.

[0179] According to various embodiments, each component (e.g., a module or a program) of the above-described components may include one or more entities, and some of the entities may be separated and placed in other components. According to various embodiments, one or more components or operations of the aforementioned components may be omitted, or one or more other components or operations may be added. Alternatively or additionally, a plurality of components (e.g., a module or a program) may be integrated into a single component. In such a case, the integrated component may perform one or more functions of each of the plurality of components identically or similarly to those performed by the corresponding component among the plurality of components prior to the integration. According to various embodiments, the operations performed by a module, program, or other component may be executed sequentially, in parallel, iteratively, or heuristically, or one or more of the operations may be executed in a different order, omitted, or one or more other operations may be added.

[0180] According to one embodiment of the present disclosure, an electronic device (2101) may be provided. The electronic device (2101) may include a lens assembly (100; 200; 300; 400; 500) including a first lens (L1), a second lens (L2), a third lens (L3), and a fourth lens (L4) arranged along an optical axis direction from an object side to an image side; and an image sensor (IS) arranged to receive light focused or guided by the lens assembly. The first lens (L1) has positive refractive power, the second lens (L2) has negative refractive power, the third lens (L3) has positive refractive power, and at least one of an object-side surface or an image-side surface of the second lens (L2) may have an inflection point. In addition, the electronic device may satisfy the following [Equation 1] and [Equation 2].

[0181] [Formula 1]

[0182]

[0183] [Formula 2]

[0184]

[0185] (Here, 'OAL' is the distance from the subject side of the first lens to the image plane, HFoV is the half-angle of view of the optical system including the lens assembly, and FoV is the angle of view of the optical system including the lens assembly.)

[0186] According to one embodiment, the electronic device can satisfy the following [Equation 3].

[0187] [Formula 3]

[0188]

[0189] (Here, 'Vd1' is the Abbe's number of the first lens, and 'Vd2' is the Abbe's number of the second lens)

[0190] According to one embodiment, the central portion adjacent to the optical axis on the upper side of the second lens may have an inflective shape that is concave toward the upper side, and the peripheral portion on the upper side of the second lens may have an inflective shape that is convex toward the upper side.

[0191] In one embodiment, the subject-side surface of the second lens may be convex toward the subject.

[0192] In one embodiment, the first lens may have a subject-side surface convex toward the subject, and an image-side surface of the first lens may be convex or concave toward the image side.

[0193] According to one embodiment, the subject-side surface and the image-side surface of the third lens may have a meniscus shape that is convex toward the image side.

[0194] In one embodiment, the aperture may be positioned adjacent to the subject-side surface or the image-side surface of the first lens.

[0195] According to one embodiment, the electronic device can satisfy the following [Equation 4].

[0196] [Formula 4]

[0197]

[0198] (where 'nd3' is the d-line refractive index of the third lens)

[0199] According to one embodiment, the electronic device can satisfy the following [Equation 5].

[0200] [Formula 5]

[0201]

[0202] (Here, 'f1' is the focal length of the first lens, and 'f2' is the focal length of the third lens)

[0203] According to one embodiment, the fourth lens may have a meniscus shape in which the subject-side surface and the image-side surface are convex toward the subject.

[0204] According to one embodiment, the fourth lens may have a curvature shape in which the subject-side surface and the image-side surface have different signs of curvature radius at the center and the periphery adjacent to the optical axis, respectively.

[0205] According to one embodiment, the electronic device can satisfy the following [Equation 6].

[0206] [Formula 6]

[0207]

[0208] (Here, 'OAL' is the distance from the subject side of the first lens to the image plane, and 'IH' is the maximum height of the image plane)

[0209] In one embodiment, the electronic device may be a laptop computer.

[0210] In one embodiment, the first lens, the second lens, the third lens and the fourth lens may be formed of plastic aspherical lenses.

[0211] According to one embodiment, the distance from the subject side of the first lens to the image plane may be approximately 1.8 mm or less.

[0212] According to one embodiment of the present disclosure, an electronic device (2101) may be provided. The electronic device may include a display; a bezel structure at least partially surrounding the display; and a camera module disposed in the bezel structure. The camera module may include a lens assembly (100; 200; 300; 400; 500) including a first lens (L1), a second lens (L2), a third lens (L3), and a fourth lens (L4) disposed along an optical axis direction from an object side to an image side; and an image sensor (IS) disposed to receive light focused or guided by the lens assembly. The first lens (L1) has positive refractive power, the second lens (L2) has negative refractive power, the third lens (L3) has positive refractive power, at least one of the subject-side surface or the image-side surface of the second lens (L2) has an inflection point, the image-side surface of the second lens has an inflective shape in which a central portion adjacent to the optical axis is concave and a peripheral portion is convex, the subject-side surface and the image-side surface of the third lens have a meniscus shape convex toward the image side, and the fourth lens may have a meniscus shape in which the subject-side surface and the image-side surface are convex toward the subject side. In addition, the electronic device may satisfy the following [Formula 1] and [Formula 2].

[0213] [Formula 1]

[0214]

[0215] [Formula 2]

[0216]

[0217] (Here, 'OAL' is the distance from the subject side of the first lens to the image plane, HFoV is the half-angle of view of the optical system including the lens assembly, and FoV is the angle of view of the optical system including the lens assembly.)

[0218] According to one embodiment, the electronic device can satisfy the following [Equation 3].

[0219] [Formula 3]

[0220]

[0221] (Here, 'Vd1' is the Abbe's number of the first lens, and 'Vd2' is the Abbe's number of the second lens)

[0222] According to one embodiment, the electronic device can satisfy the following [Equation 4].

[0223] [Formula 4]

[0224]

[0225] (where 'nd3' is the d-line refractive index of the third lens)

[0226] According to one embodiment, the electronic device can satisfy the following [Equation 5].

[0227] [Formula 5]

[0228]

[0229] (Here, 'f1' is the focal length of the first lens, and 'f2' is the focal length of the third lens)

[0230] According to one embodiment, the electronic device can satisfy the following [Equation 6].

[0231] [Formula 6]

[0232]

[0233] (Here, 'OAL' is the distance from the subject side of the first lens to the image plane, and 'IH' is the maximum height of the image plane)

[0234] While the detailed description of various embodiments of the present disclosure has been given with reference to specific embodiments, it will be apparent to those skilled in the art that various modifications may be made without departing from the spirit and scope of the present disclosure. For example, the spacing, width, dimensions, etc. of all or each of the four lens(es) of the present disclosure may be appropriately set according to the structure and requirements of the lens assembly to be actually manufactured or the camera and / or electronic device to which such lens assembly will be mounted, the actual usage environment, etc.

[0235] The effects that can be obtained from the present disclosure are not limited to the effects mentioned above, and other effects that are not mentioned will be clearly understood by a person having ordinary skill in the art to which the present disclosure pertains.

Claims

1. In an electronic device (2101), A lens assembly (100; 200; 300; 400; 500) including a first lens (L1), a second lens (L2), a third lens (L3), and a fourth lens (L4) arranged along an optical axis direction from the object side to the image side; and An image sensor (IS) is arranged to receive light focused or guided by the lens assembly, The first lens (L1) has positive refractive power, the second lens (L2) has negative refractive power, the third lens (L3) has positive refractive power, and at least one of the subject-side surface or the image-side surface of the second lens (L2) has an inflection point. An electronic device satisfying the following [Formula 1] and [Formula 2]. [Formula 1] [Formula 2] Here, 'OAL' is the distance from the subject side of the first lens to the image plane, HFoV is the half-angle of view of the optical system including the lens assembly, and FoV is the angle of view of the optical system including the lens assembly.

2. In paragraph 1, An electronic device satisfying the following [Formula 3]. [Formula 3] Here, 'Vd1' is the Abbe's number of the first lens, and 'Vd2' is the Abbe's number of the second lens.

3. In paragraph 1 or 2, An electronic device having an inflective shape in which a central portion adjacent to the optical axis on the upper side of the second lens is concave toward the upper side and a peripheral portion on the upper side of the second lens is convex toward the upper side.

4. In paragraph 3, An electronic device in which the subject-side surface of the second lens is convex toward the subject.

5. In any one of paragraphs 1 to 4, An electronic device wherein the first lens has a subject-side surface convex toward the subject, and an image-side surface of the first lens is convex or concave toward the image side.

6. In any one of paragraphs 1 to 5, An electronic device in which the subject-side surface and the image-side surface of the third lens have a meniscus shape convex toward the image side.

7. In any one of paragraphs 1 to 6, An electronic device having an aperture positioned adjacent to the subject-side surface or the image-side surface of the first lens.

8. In any one of paragraphs 1 to 7, An electronic device satisfying the following [Formula 4]. [Formula 4] Here, 'nd3' is the d-line refractive index of the third lens.

9. In any one of paragraphs 1 to 8, An electronic device satisfying the following [Formula 5]. [Formula 5] Here, 'f1' is the focal length of the first lens, and 'f3' is the focal length of the third lens.

10. In any one of paragraphs 1 to 9, The above fourth lens is an electronic device having a meniscus shape in which the subject-side surface and the image-side surface are convex toward the subject.

11. In any one of paragraphs 1 to 10, The above fourth lens is an electronic device in which the subject-side surface and the image-side surface have a curvature radius of different signs at the center and the periphery adjacent to the optical axis, respectively.

12. In any one of paragraphs 1 to 11, An electronic device satisfying the following [Formula 6]. [Formula 6] Here, 'OAL' is the distance from the subject side of the first lens to the image plane, and 'IH' is the maximum height of the image plane.

13. In any one of paragraphs 1 to 12, The above electronic device is an electronic device that is a laptop computer.

14. In any one of paragraphs 1 to 13, An electronic device wherein the first lens, the second lens, the third lens and the fourth lens are made of plastic aspherical lenses.

15. In any one of paragraphs 1 to 14, A full-length device in which the distance from the subject side of the first lens to the image plane is approximately 1.8 mm or less.

Images