Optical system and electronic device including same

Abstract

According to one embodiment of the present disclosure, an electronic device comprising an optical system is disclosed. The optical system (100; 200; 300; 400) included in the electronic device may comprise: an image sensor (IS); and a lens assembly including at least four lenses sequentially arranged along the optical axis (O-I) direction from the object side (obj) toward the image side of the image sensor. The lens assembly includes a first lens (L1) that is disposed first from the object side and has positive refractive power, and a second lens (L2) that is disposed second from the object side and has negative refractive power, and the image-side surface of a third lens (L3) disposed third from the object side may have an inflection shape in which the curvature near the optical axis and the curvature of a peripheral portion have different signs from each other.

Description

Optical system and electronic device including the same

[0001] Various embodiments of the present disclosure relate to optical systems related to the imaging of light, for example, to a lens assembly constituting an optical system and an electronic device including the same.

[0002] Optical devices, such as cameras capable of taking photos or videos, have been widely used. While film-based optical devices were dominant in the past, digital cameras and video cameras equipped with solid-state image sensors, such as CCDs (charge coupled devices) or CMOS (complementary metal-oxide semiconductors), have recently become commonplace. Lens assemblies employing solid-state image sensors (CCDs or CMOS) are replacing film-based lens assemblies because they facilitate the storage, replication, and / or transfer of images between electronic devices compared to film-based lens assemblies.

[0003] Recently, for example, two or more selected optical devices, such as macro cameras, telephoto cameras, and / or wide-angle cameras, have been mounted on a single electronic device to improve the quality of captured images and to impart various visual effects to the images. For instance, high-quality images can be obtained by acquiring images of a subject through multiple cameras with different optical characteristics and synthesizing them. As it has become possible to acquire high-quality images by mounting multiple lens cameras on a single device, electronic devices such as mobile communication terminals or smartphones can replace electronic devices specialized in shooting functions, such as digital cameras.

[0004] However, in miniaturized and / or lightweight electronic devices, it may be difficult to improve the performance of a camera or a lens assembly placed therein. For example, the internal space of a miniaturized and / or lightweight electronic device may be narrow, making it difficult for the camera to perform telephoto functions within the limited space.

[0005] The information described above may be provided as background art for the purpose of aiding understanding of the disclosure of this disclosure. No claim or determination is made as to whether any of the foregoing may be applied as prior art in relation to the disclosure of this disclosure.

[0006] According to one embodiment of the present disclosure, an electronic device comprising an optical system may be provided. The optical system may include an image sensor (IS); and a lens assembly comprising at least four lenses arranged sequentially along an optical axis (OI) direction from the object side (obj) toward the image side of the image sensor. The lens assembly may include a first lens positioned at the first object side and having positive refractive power, and a second lens positioned at the second object side and having negative refractive power. The lens assembly may have an inflection shape in which the upper surface of a third lens positioned at the third object side has a curvature near the optical axis and a peripheral curvature sign different, and the electronic device comprising the following optical system may satisfy [Equation 1], [Equation 2], and [Equation 3].

[0007] [Equation 1]

[0008] 70 < Vd1 < 100

[0009] [Equation 2]

[0010] 1.5 < Nd2 < 1.75

[0011] [Equation 3]

[0012] FOV < 60

[0013] (Here, Vd1 is the Abbe number of the first lens from the subject side, Nd2 is the refractive index of the second lens from the subject side, and FOV is the angle of view of the entire optical system.)

[0014] According to one embodiment of the present disclosure, an electronic device comprising an optical system may be provided. The optical system may include an image sensor (IS); and a lens assembly comprising at least four lenses arranged sequentially along an optical axis (OI) direction from the object side (obj) toward the image side of the image sensor. The lens assembly may include a first lens (L1) positioned at the first object side and having a positive refractive power, and a second lens (L2) positioned at the second object side and having a negative refractive power. In the lens assembly, the first lens (L1) may be made of a glass material, and the remaining lenses excluding the first lens (L1) in the lens assembly may be made of a resin material. An electronic device comprising the following optical system may satisfy [Equation 1], [Equation 2], and [Equation 3].

[0015] [Equation 1]

[0016] 70 < Vd1 < 100

[0017] [Equation 2]

[0018] 1.5 < Nd2 < 1.75

[0019] [Equation 3]

[0020] FOV < 60

[0021] (Here, Vd1 is the Abbe number of the first lens from the subject side, Nd2 is the refractive index of the second lens from the subject side, and FOV is the angle of view of the entire optical system.)

[0022] The aspects, configurations, and / or advantages described above regarding one embodiment of the present disclosure may become more apparent from the following detailed description with reference to the accompanying drawings.

[0023] FIG. 1 is a schematic diagram showing an optical system according to one embodiment of the present disclosure.

[0024] FIG. 2 is a graph showing the spherical aberration of an optical system according to the embodiment of FIG. 1.

[0025] FIG. 3 is a graph showing the astigmatism of an optical system according to the embodiment of FIG. 1.

[0026] FIG. 4 is a graph showing the distortion of an optical system according to the embodiment of FIG. 1.

[0027] FIG. 5 is a configuration diagram showing an optical system according to one embodiment of the present disclosure.

[0028] FIG. 6 is a graph showing the spherical aberration of an optical system according to the embodiment of FIG. 5.

[0029] FIG. 7 is a graph showing the astigmatism of an optical system according to the embodiment of FIG. 5.

[0030] FIG. 8 is a graph showing the distortion of an optical system according to the embodiment of FIG. 5.

[0031] FIG. 9 is a configuration diagram showing an optical system according to one embodiment of the present disclosure.

[0032] FIG. 10 is a graph showing the spherical aberration of an optical system according to the embodiment of FIG. 9.

[0033] FIG. 11 is a graph showing the astigmatism of an optical system according to the embodiment of FIG. 9.

[0034] FIG. 12 is a graph showing the distortion of an optical system according to the embodiment of FIG. 9.

[0035] FIG. 13 is a configuration diagram showing an optical system according to one embodiment of the present disclosure.

[0036] FIG. 14 is a graph showing the spherical aberration of an optical system according to the embodiment of FIG. 13.

[0037] FIG. 15 is a graph showing the astigmatism of an optical system according to the embodiment of FIG. 13.

[0038] FIG. 16 is a graph showing the distortion of an optical system according to the embodiment of FIG. 13.

[0039] FIG. 17 is a block diagram of an electronic device in a network environment according to various embodiments.

[0040] FIG. 18 is a block diagram illustrating a camera module according to various embodiments.

[0041] Throughout the attached drawings, similar parts, configurations, and / or structures may be assigned similar reference numbers.

[0042] For example, in the case of a camera with telephoto performance of several magnifications (e.g., 3x), it may be difficult to accommodate the miniaturization of electronic devices because the overall length of the optical system included in the camera is relatively long compared to other cameras (e.g., wide-angle cameras). Generally, such a telephoto camera can be composed of five lenses made of plastic resin material.

[0043] According to various embodiments of the present disclosure, in an optical system composed of four or five lenses, the first lens from the subject side is made of a low-dispersion material (e.g., glass material) with an Abbe number of 70 or higher to provide an optical system having telephoto performance with an angle of view of approximately 30 to 60 degrees. By using a low-dispersion material (e.g., glass material) for the first lens from the subject side, it is advantageous for controlling aberrations (e.g., chromatic aberration), and the overall length of the optical system can be effectively reduced, thereby enabling the miniaturization of electronic devices.

[0044] Various embodiments of the present disclosure are intended to at least resolve the problems and / or disadvantages described above and at least provide the advantages described below, thereby enabling close-up photography with a telephoto camera while providing a miniaturized lens assembly and / or an electronic device including the same.

[0045] Additional aspects according to one embodiment will be presented through the detailed description below, which may become partially apparent from the description or understood through the embodiments of the presented implementation.

[0046] The following description regarding the attached drawings may be provided to facilitate a comprehensive understanding of various implementations of the disclosure defined by the claims and their corresponding contents. The specific embodiments disclosed in the following description include various specific details to aid understanding, but are to be considered as one of various embodiments. Accordingly, it is evident to those skilled in the art that various changes and modifications to the various implementations described in this disclosure may be made without departing from the scope and technical spirit of the disclosure. Furthermore, for clarity and brevity, descriptions of well-known functions and configurations may be omitted.

[0047] The terms and words used in the following description and claims are not limited to their literal meanings but may be used to clearly and consistently describe various embodiments of the present disclosure. Accordingly, it will be obvious to a person skilled in the art that the following description of various embodiments of the disclosure is provided for illustrative purposes only and not for the purpose of limiting the scope of the rights or the disclosure defined as equivalent thereto.

[0048] Unless the context clearly indicates otherwise, it should be understood that the singular forms of "a," "an," and "the" include a plural meaning. Thus, for example, "component surface" may mean one or more of the component surfaces.

[0049] According to various embodiments, an optical device (e.g., a camera) may be included as a representative example of the electronic device, and the following description may be based on the premise that a lens assembly is mounted on the optical device as one embodiment. Furthermore, the optical device may be interpreted as including an optical system in which light incident on the lens assembly is formed on an image sensor.

[0050] In describing the various embodiments of the present disclosure, some numerical values ​​may be presented, but it should be noted that such numerical values ​​do not limit the various embodiments of the present disclosure unless otherwise stated in the claims.

[0051] Hereinafter, with reference to FIGS. 1 to 16, various embodiment(s) of the components of an optical system and an electronic device including the same will be examined.

[0052] FIG. 1 is a schematic diagram showing an optical system according to one embodiment of the present disclosure.

[0053] Referring to FIG. 1, an optical system (100) according to one of the various embodiments of the present disclosure may include a lens assembly comprising a plurality of lenses (e.g., L1, L2, L3, L4, L5) and an image sensor (IS). The optical system (100), by including the plurality of lenses (e.g., L1, L2, L3, L4, L5) and the image sensor (IS), may cover a telephoto range with an angle of view of approximately 30 to 60 degrees. In the various embodiments below, an optical system having an angle of view of 32.5 to 36.5 degrees may be described exemplarily.

[0054] According to various embodiments, an image sensor (IS) may be mounted on an electronic device. Here, the electronic device may be an optical device and may include a camera module (e.g., the camera module (1780) of FIG. 17 described below, and the camera module (1880) of FIG. 18). A lens assembly comprising a plurality of lenses (e.g., L1, L2, L3, L4, L5) may be mounted on the electronic device to form a camera module together with the image sensor (IS). For example, in describing various embodiments of the present disclosure, an example in which the image sensor (IS) is provided in an optical system (100) together with a lens assembly will be described, but the image sensor (IS) may be mounted and used on the optical device and / or the electronic device separately from the lens assembly.

[0055] According to various embodiments, the image sensor (IS) is a sensor mounted on a circuit board (not shown), etc., and positioned in a state aligned with the optical axis (OI), and is capable of responding to light. The image sensor (IS) may include, for example, a sensor such as a CMOS image sensor (complementary metal-oxide semiconductor) or a charge coupled device (CCD). The image sensor (IS) is not limited thereto and may include, for example, various devices that convert an image of a subject into an electrical image signal. The image sensor (IS) can acquire an image of a subject (obj) (virtual subject) by detecting brightness information, grayscale ratio information, color information, etc., of the subject (obj) from light passing through a plurality of lenses (e.g., L1, L2, L3, L4, L5).

[0056] According to various embodiments, at least some of the plurality of lenses (e.g., L1, L2, L3, L4, L5) included in the optical system (100) may be made of a resin (e.g., plastic) material. According to various embodiments, the optical system (100) may be implemented, for example, by lenses composed of synthetic resin (e.g., plastic) each having a predetermined refractive index. Since the plurality of lenses are made of synthetic resin material, there may be a high degree of design freedom regarding their size or shape. For example, regarding the refractive index at a specific wavelength of visible light (e.g., 587.6000 nm, d-line), the second lens (L2) may be formed as a synthetic resin lens with a refractive index of 1.66 or higher, the third lens (L3) may be formed as a synthetic resin lens with a refractive index of 1.55 or lower, and the fourth lens (L4) may be composed of a synthetic resin lens having a refractive index of 1.55 or lower. Through such a design of refractive index, it may be possible to miniaturize the lens assembly and / or the electronic device including it. According to 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. Meanwhile, in the present disclosure, among a plurality of lenses (e.g., L1, L2, L3, L4, L5), the first lens (e.g., the first lens (L1)) from the subject may be made of glass material. For example, the remaining lenses (L2, L3, L4, L5), excluding the first lens (L1), may be made of a synthetic resin (e.g., plastic). The Abbe number of the first lens will be described in detail below.

[0057] According to various embodiments, the image sensor (IS) may have an image height of approximately 2.38 mm to 2.40 mm. For reference, the image height may mean half the diagonal length of the image sensor in a thin image sensor formed in an approximately rectangular shape (e.g., square or rectangle) with the optical axis (OI) as the normal.

[0058] According to various embodiments, the optical system (100) may have an optical axis (OI) extending from the object side (O, object side) to the image side (I, image side). 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 plane (img) where the image is formed is located. Additionally, the "face facing the object side" of the lens refers to the left surface (or front) of the lens in the drawings (e.g., FIG. 1) according to various embodiments of the present disclosure as the face in which the object (obj) is located relative to the optical axis (OI), for example, and the "face facing the image side" refers to the right surface (or rear) of the lens in the drawings (e.g., FIG. 1) as the face in which the image plane (img) is located relative to the optical axis (OI). Here, the imaging plane (img) may be, for example, a part where an image element or an image sensor (IS) is placed and an image is formed.

[0059] Based on at least one lens among the plurality of lenses included in the optical system (100), looking toward the subject side (O) along the optical axis (OI) can be defined as ‘facing the first direction (or forward)’, and looking toward the image side (I) along the optical axis (OI) can be defined as ‘facing the second direction (or backward)’. According to various embodiments, when a lens (e.g., the first lens (L1)) includes a surface facing toward the subject side (O), the surface facing toward 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 toward the image side (I), the surface facing toward the image side (I) can be said to face the second direction.

[0060] Referring to FIG. 1, an optical system (100) according to various embodiments may include, for example, a plurality of lenses (e.g., L1, L2, L3, L4, L5) arranged sequentially in the direction of the optical axis (OI) (e.g., the direction toward the image (I) from the subject (O) in FIG. 1), a first lens (L1), a second lens (L2), a third lens (L3), a fourth lens (L4), and a fifth lens (L5). The plurality of lenses (e.g., L1, L2, L3, L4, L5) may be arranged in a state aligned with the optical axis with an image sensor (IS). The statement that the plurality of lenses (e.g., L1, L2, L3, L4, L5) are aligned with the optical axis with the image sensor (IS) may mean that the center of the plurality of lenses (e.g., L1, L2, L3, L4, L5) and the center of the image sensor (IS) are aligned on the optical axis. However, the embodiments of the present disclosure are not necessarily limited to having five lenses. For example, in the embodiments of FIGS. 9 to 12, an optical system (300) having four lenses may be illustrated.

[0061] In describing a plurality of lenses (e.g., L1, L2, L3, L4, L5) according to various embodiments, the side of each lens closer to the optical axis (OI) may be referred to as the 'chief portion' below, and the side farther from the optical axis (OI) (or near the edge of the lens) may be referred to as the 'marginal portion' below. The chief portion may, for example, be a part of the first lens (L1) that intersects the optical axis (OI). The marginal portion may, for example, be a part of the first lens (L1) that is spaced a predetermined distance from the optical axis. The marginal portion may, for example, include the end portion of the lens that is furthest from the optical axis (OI). However, it should be noted that this is merely an example, and the marginal portion is not necessarily limited to the end portion of the lens, and the marginal portion may correspond to a point located at a relatively far distance compared to the chief portion.

[0062] According to various embodiments, in order to configure an optical device, the first lens (L1) included in the optical system (100) may have a positive refractive power, and the second lens (L2) may have a negative refractive power. And the third lens (L3) may have a negative refractive power. Meanwhile, the fourth lens (L4) and the fifth lens (L5) may each be selected to have either a positive or a negative refractive power. For example, the first lens (L1), the second lens (L2), the third lens (L3), the fourth lens (L4), and the fifth lens (L5) may have a refractive power of 'positive, negative, negative, positive, negative', or a refractive power of 'positive, negative, negative, negative, positive', or a refractive power of 'positive, negative, negative, negative, negative', or a refractive power of 'positive, negative, negative, positive, positive'. In the embodiments described above, when light parallel to the optical axis (OI) is incident on a lens having positive refractive power, the light passing through the lens can be concentrated. For example, the lens having positive refractive power may be a lens based on the principle of a convex lens. On the other hand, when light parallel to a lens having negative refractive power is incident, the light passing through the lens may be dispersed. For example, the lens having negative refractive power may be a lens based on the principle of a concave lens. In the present disclosure, the first lens (L1) is configured with positive power, which is advantageous for miniaturization even in telephoto optical systems with an angle of view of 60 degrees or less, and the second and third lenses are arranged with negative power, thereby minimizing chromatic aberration that increases during miniaturization.

[0063] According to various embodiments, the first lens (L1) may be configured as a lens having a relatively larger effective diameter compared to the second lens (L2). Here, "effective diameter" refers to the range of the boundary where light is received by the lens in a direction perpendicular to the optical axis (OI), and, for example, may mean the distance between the end portion where light is received and the other portion on the surface of the lens facing the subject. In other words, the effective diameters of each lens included in the lens assembly in the optical system of the present disclosure may have a shape that decreases as they move toward the image side and then increases again. For example, the effective diameter of the first lens (L1) may be larger than the effective diameter of the second lens (L2), and the effective diameter of the second lens (L2) may be larger than the effective diameter of the third lens (L3). Additionally, the effective diameter of the fourth lens (L4) may be larger than the effective diameter of the third lens (L3), and the effective diameter of the fifth lens (L5) may be larger than the effective diameter of the fourth lens (L4).

[0064] According to various embodiments, the surfaces (S1, S2, S3, S4, S6, S7, S8, S9, S10, S11) of the first lens (L1), the second lens (L2), the third lens (L3), the fourth lens (L4), and the fifth lens (L5) may be formed as aspheric. Spherical aberration that may occur in the first lens (L1), the second lens (L2), the third lens (L3), the fourth lens (L4), and the fifth lens (L5) can be reduced and / or prevented by making the surfaces (S1, S2, S3, S4, S6, S7, S8, S9, S10, S11) of the first lens (L1), the second lens (L2), the third lens (L3), the fourth lens (L4), and the fifth lens (L5) as aspherical.

[0065] 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 specifically noted. Additionally, the thickness of the lens, the spacing between lenses, and the OAL (or TTL (total track length)) may be distances measured around the optical axis of the lens.

[0066] In a description of the shape of a lens, the statement that one surface is convex implies that the optical axis portion of that surface is convex, unless otherwise specified, such as having an inflection point. Similarly, the statement that one surface is concave implies that the optical axis portion of that surface is concave, unless otherwise specified, such as having an inflection point. For example, even if one surface of a lens (the optical axis portion of that surface) is described as having a convex shape, the edge portion of the lens (the portion spaced a certain distance from the optical axis portion of that surface) may be concave. Likewise, 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 certain distance from the optical axis portion of that surface) may be convex.

[0067] In the following detailed description and claims, the term "inflection point" may refer to a point where the sign of the radius of curvature changes in a portion that does not intersect the optical axis. For example, when there is an inflection point between the center and the periphery of one surface of a lens, the curvature of one surface of the lens may change from a (-) radius of curvature to a (+) radius of curvature, or from a (+) radius of curvature to a (-) radius of curvature, as it moves from the center to the periphery. Furthermore, 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 from a concave shape to a convex shape. According to one embodiment, the inflection point may be designed to have an inflection shape in which the sign of the curvature near the optical axis and the sign of the periphery of the curvature are different. According to the present disclosure, as illustrated in FIG. 1, the optical system (100) may include at least one inflection point on the upper side surface (S7) of the third lens (L3). Here, at the inflection point on the upper side (S7) of the third lens (L3), the third lens (L3) may be designed to have an inflection shape in which the central curvature relatively close to the optical axis and the peripheral curvature sign relatively farther from the optical axis are different. According to one embodiment, the inflection points may be formed at symmetrical positions on both the upper and lower sides with respect to the optical axis (OI).

[0068] The first lens (L1) may have a surface (S1) facing the subject side (O) that is convex toward the subject side. The surface (S2) of the first lens (L1) facing the image side (I) may be convex or concave toward the image side. In the present disclosure, the first lens (L1) has positive power and the subject side surface (S1) has a convex shape, which may be advantageous for reducing the size of the optical system (100). Although the lens aperture may increase when Fno is reduced, the increase in the aperture of the entire optical system (100) can be minimized because the first lens (L1) has positive power and the subject side surface (S1) has a convex shape.

[0069] The second lens (L2) may have a surface (S3) facing the subject side (O) that is convex or concave toward the subject side. The surface (S4) of the second lens (L2) facing the image side (I) may be concave toward the image side. Referring to FIG. 1, the second lens (L2) may have a surface (S3) facing the subject side (O) that has an inflection shape, so that the surface (S3) facing the subject side (O) may have a shape that is concave toward the subject side in the periphery. According to one embodiment, the second lens (L2) may have a meniscus shape that is convex toward the subject side or concave toward both the subject side and the image side. By having a meniscus shape that is convex toward the subject side or concave toward both the subject side and the image side, the second lens (L2) may be advantageous for correcting spherical aberration of the optical system (100).

[0070] The optical system (100) may include at least one aperture stop (S5). Depending on the position of the aperture, the amount of light reaching the image plane (img) of the image sensor (IS) may be controlled. For example, the aperture (S5) may be positioned between the second lens (L2) and the third lens (L3).

[0071] 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 (or concave toward the subject side). Referring to FIG. 1, the third lens (L3) may have an inflection point on the surface (S7) facing the image side (O). Including an inflection point may be advantageous for correcting astigmatism and curvature aberration. The advantages of having an inflection point will be described in more detail below. Meanwhile, according to one embodiment, the optical system (100) may also include at least one inflection point on the subject side surface (S3) of the second lens (L2).

[0072] 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 image (or concave toward the subject). The fifth lens (L5) may also have a meniscus shape in which the subject side surface (S10) and the image side surface (S11) are convex toward the image (or concave toward the subject). By configuring the fourth lens (L4) and the fifth lens (L5) into a meniscus shape that is convex toward the image (or concave toward the subject), it may be advantageous for correcting astigmatism and curvature aberration.

[0073] The effective diameter of the fifth lens (L5) can be the largest compared to other lenses.

[0074] According to various embodiments, among the plurality of lenses (e.g., L1, L2, L3, L4, L5) constituting the optical system (100), the narrower the distance between one lens and an adjacent lens, the shorter the overall length (OAL) of the optical system (100) may be. Here, the overall length (OAL) may be the distance from the surface (S1) facing the subject side of the first lens (L1) to the upper surface (img) of the image sensor. For example, when making an electronic device containing the optical system (100) according to various embodiments of the present disclosure small, it is advantageous to keep the overall length of the optical system (100) as short as possible. However, there may be physical limitations to shortening the overall length of the optical system (100) while ensuring an appropriate telephoto ratio. According to various embodiments of the present disclosure, the spacing of the plurality of lenses (e.g., L1, L2, L3, L4, L5) can be designed to vary according to the optical characteristics (e.g., aberration characteristics, wide angle characteristics and / or brightness characteristics) required of the optical system (100).

[0075] The optical system (100) may further include a filter (F) positioned between the fifth lens (L5) and the image sensor (IS). The filter (F) includes a subject side surface (S12) and an image side surface (S13) and can block light, such as infrared light, detected by the film or image sensor of the optical device. The filter (F) may include at least one of, for example, a low-pass filter or a cover glass. For example, when the filter (F) is installed, the color tone of the image, etc., detected and captured through the image sensor (IS) can be made to approximate the color tone perceived by a person when looking at an actual object. Additionally, the filter (F) transmits visible light and emits infrared light to the outside, thereby preventing infrared light from being transmitted to the image plane (img) of the image sensor.

[0076] The optical system (100) as described above can be designed to satisfy the following [Equation 1], [Equation 2] and [Equation 3].

[0077] [Equation 1]

[0078] 70 < Vd1 < 100

[0079] [Equation 2]

[0080] 1.5 < Nd2 < 1.75

[0081] [Equation 3]

[0082] FOV < 60

[0083] Here, 'Vd1' is the Abbe number of the first lens (L1), and 'Nd2' is the refractive index of the second lens (L2). Also, FOV may refer to the angle of view of an optical system (100) including a lens assembly. [Equation 1] is an equation that limits the Abbe number of the first lens (L1), and by using a material with an Abbe number exceeding 70, chromatic aberration that may occur during the miniaturization of an optical system (e.g., a telephoto lens) with telephoto performance can be minimized. This makes it possible to secure high-resolution images even in the miniaturized design of an electronic device. To satisfy [Equation 1], the lens may include a glass material. [Equation 2] is an equation that limits the refractive index of the second lens (L2), and if it exceeds the upper or lower limit, a glass material may be used instead of a synthetic resin (e.g., plastic) material. If the remaining lenses, excluding the first lens (L1), include glass material, the weight and / or manufacturing cost of the electronic device may increase. [Equation 3] represents the angle of view of an optical system and, in the present disclosure, can be applied to an optical system having an angle of view of 60 degrees or less, for example, an optical system having telephoto performance of approximately 2x to 3x magnification (e.g., a telephoto lens). The present disclosure can be applied to all optical systems having an angle of view of 60 degrees or less, but as an example, in the embodiments of FIGS. 1 to 16, an optical system having an angle of view of 32.5 degrees to 36.5 degrees may be provided. In addition, the optical system (100) as described above may satisfy the following [Equation 4].

[0084] [Equation 4]

[0085] 2 < OAL / IH < 3.5

[0086] Here, OAL represents the total length of the optical system, and IH represents the image height of the image sensor. If the value exceeds the upper limit of [Equation 4], the total length relative to the image height increases, which is advantageous for securing telephoto magnification, but it may be disadvantageous for miniaturizing the electronic device due to the increased thickness of the electronic device. If the value falls below the lower limit, the total length relative to the image height decreases, which is advantageous for miniaturization but may be disadvantageous for securing telephoto magnification.

[0087] In addition, the optical system (100) as described above can satisfy the following [Equation 5].

[0088] [Equation 5]

[0089] 45 < Vd1 - Vd2 < 65

[0090] Here, Vd1 is the Abbe number of the first lens (L1), and Vd2 is the Abbe number of the second lens (L2). The optical system of the present disclosure may be configured such that the difference between the Abbe number of the first lens (L1) and the Abbe number of the second lens (L2) satisfies [Equation 5] above. If it exceeds the upper limit of [Equation 5], it is advantageous for chromatic aberration correction, but glass material must be used for both the first lens (L1) and the second lens (L2), and in this case, the weight and / or manufacturing cost of the optical system may increase. If it falls below the lower limit of [Equation 5], chromatic aberration may increase.

[0091] In addition, the optical system (100) as described above can satisfy the following [Equation 6].

[0092] [Equation 6]

[0093] 30 < Vd3 - Vd4 < 40

[0094] Here, Vd3 is the Abbe number of the third lens (L3), and Vd4 is the Abbe number of the fourth lens (L4). The optical system of the present disclosure may be configured such that the difference between the Abbe number of the third lens (L3) and the Abbe number of the fourth lens (L4) satisfies [Equation 6] above. If it exceeds the upper limit of [Equation 6], it is advantageous for chromatic aberration correction, but glass material must be used for both the third lens (L3) and the fourth lens (L4), and in this case, the weight and / or manufacturing cost of the optical system may increase. If it falls below the lower limit of [Equation 6], chromatic aberration may increase.

[0095] According to one embodiment, an optical system (100) and an electronic device including the same may satisfy at least one of [Equation 4], [Equation 5], and [Equation 6] while satisfying the above-described [Equation 1], [Equation 2], and [Equation 3]. For example, a folded type optical system may include an optical member (e.g., a prism and / or mirror) for bending the path of light at least once at an angle close to or greater than 90 degrees, in order to meet the miniaturization of the electronic device by securing a long focal length to secure telephoto performance of approximately 5 times or more (e.g., 10 times, 100 times, etc.) while including a small number of lenses.

[0096] The present disclosure provides embodiments that are compatible with the miniaturization of electronic devices by including a small number of lenses while securing a long focal length to secure telephoto performance of approximately 2 to 3 times or approximately 5 times or more (e.g., 10 times, 100 times, etc.) in a vertical type optical system, as an embodiment other than the above refractive optical system in which light is bent by approximately 90 degrees.

[0097] In addition, the optical system (100) and the electronic device including it may be manufactured to have the specifications exemplified in the following [Table 1].

[0098] In [Table 1], 'stop' refers to the aperture (STO), which can be positioned between the second lens (L2) and the third lens (L3). 'radius' may refer to the radius of curvature of the lens, 'thickness' to the thickness of the lens or the air gap, 'nd' to the refractive index of the medium (e.g., lens), and 'vd' to the Abbe's number of the lens. The radius of curvature may represent, for example, a value indicating the degree of curvature at each point of a curved surface or curve. S1 and S2 may refer to the surface of the first lens (L1) facing the subject side and the surface facing the image side, respectively. S3 and S4 may refer to the surface of the second lens (L2) facing the subject side and the surface facing the image side, respectively. S6 and S7 may refer to the surface of the third lens (L3) facing the subject side and the surface facing the image side, respectively. S8 and S9 may each represent the surface of the fourth lens (L4) facing the subject side and the surface facing the image side. S10 and S11 may each represent the surface of the fifth lens (L5) facing the subject side and the surface facing the image side. S12 and S13 may each represent the surface of the filter (F) facing the subject side and the surface facing the image side.

[0099] [Table 1] may relate to an optical system having a combined effective focal length (EFL) of 7.03 mm, Fno of 2.4, ImgH (image height) of 2.28 mm, and a field of view (FOV) of 36.3 degrees.

[0100] SurfaceRadiusThicknessNdVdS11.6551.0061.497081.61S2-19.0360.103S3-270.5 130.2301.650421.52S45.4890.732StopInfinity0.634S6-5.1470.2301.534955.74S 76.8360.939S8-3.9390.4401.670719.24S9-3.4460.114S10-3.8450.4781.534955.7 4S11-17.0160.020S12Infinity0.1101.514155.15S13Infinity0.785ImageInfinity

[0101] Tables 2 and 3 below describe the aspherical coefficients of the optical system (100), and the aspherical coefficients can be calculated using the following formula 1.

[0102] [Mathematical Formula 1]

[0103]

[0104] Here, 'x' is the distance in the direction of the optical axis (OI) from the vertex of the lenses (e.g., L1, L2, L3, L4, L5 in the embodiments of FIG. 1, 5, and 13; L1, L2, L3, L4 in the embodiment of FIG. 9), 'y' is the distance in the direction perpendicular to the optical axis (OI), 'R' is the radius of curvature from the vertex of the lenses (e.g., L1, L2, L3, L4, L5 in the embodiments of FIG. 1, 5, and 13; L1, L2, L3, L4 in the embodiment of FIG. 9), 'K' is the conic constant, and 'A i ' may mean an aspherical coefficient. In the present disclosure, E+01 is 10 1 Eul, E-02 is 10 -2 It can represent. The radius of curvature (Y Radius) can represent, for example, a value indicating the degree of curvature at each point of a surface or curve.

[0105] According to one embodiment, the subject side surface (S1) and image side surface (S2) of the first lens (L1), the subject side surface (S3) and image side surface (S4) of the second lens (L2), the subject side surface (S6) and image side surface (S7) of the third lens (L3), the subject side surface (S8) and image side surface (S9) of the fourth lens (L4), and the subject side surface (S10) and image side surface (S11) of the fifth lens (L5) may be configured as aspherical surfaces.

[0106] S1S2S3S4S6Y radius1.655-19.036-270.5135.489-5.147K-7.37779E-017.52895E+009.90000E+01-3.57539E+003.26963E+01A42.33800E-025.61469E-025.33927E-021.87157E-02-7.02951E-02A6-9.75238E-027.08986E-021.25683E-015.55272E-02-3.70668E+00A87.34721E-01-4.54480E-01-8.07857E-01-3.26167E-016.52296E+01A10-3.28329E+009.10343E-011.83406E+005.81465E-01-6.64070E+02A129.63402E+00-1.03409E+00-2.36549E+00-1.06773E-014.07430E+03A14-1.93341E+017.29138E-011.90052E+00-1.13717E+00-1.40616E+04A162.72710E+01-3.16209E-01-9.46416E-011.96527E+001.46080E+04A18-2.74657E+017.71069E-022.69661E-01-1.55931E+009.75149E+04A201.98435E+01-8.08392E-03-3.48650E-026.29218E-01-5.40828E+05A22-1.02056E+010.00000E+005.52985E-04-1.04176E-011.39650E+06A243.64754E+000.00000E+000.00000E+000.00000E+00-2.19085E+06A26-8.61178E-010.00000E+000.00000E+000.00000E+002.14934E+06A281.20782E-010.00000E+000.00000E+000.00000E+00-1.23224E+06A30-7.62186E-030.00000E+000.00000E+000.00000E+003.20347E+05

[0107] S7S8S9S10S11Y radius6.836-3.939-3.446-3.845-17.016K-1.77672E+01-5.39636E+01-7.66783E+00-2.39257E+00-6.93657E+01A4-9.31315E-02-7.47297E-02-1.74474E-01-5.62067E-01-4.40340E-01A6-8.36157E-01-2.77935E-015.36981E-012.16495E+001.33532E+00A81.43317E+011.84758E+00-1.53435E+00-6.69667E+00-3.64209E+00A10-1.41100E+02-6.70109E+003.13982E+001.54866E+017.39784E+00A128.89242E+021.06405E+01-6.70401E+00-2.54679E+01-1.05916E+01A14-3.59612E+036.43085E+001.52602E+012.98562E+011.08061E+01A168.95245E+03-6.68376E+01-2.83395E+01-2.52098E+01-7.97759E+00A18-1.10093E+041.52582E+023.74820E+011.54293E+014.29585E+00A20-5.60220E+03-2.00400E+02-3.43070E+01-6.83745E+00-1.68548E+00A224.70071E+041.70917E+022.15699E+012.16905E+004.76056E-01A24-8.48220E+04-9.65715E+01-9.15204E+00-4.79659E-01-9.41770E-02A268.02198E+043.50543E+012.50610E+007.01629E-021.23719E-02A28-4.06285E+04-7.42617E+00-4.00097E-01-6.09721E-03-9.68515E-04A308.72094E+036.99171E-012.82982E-022.38197E-043.41618E-05

[0108] FIG. 2 is a graph showing spherical aberration of an optical system according to an embodiment of FIG. 1. FIG. 3 is a graph showing astigmatism of an optical system according to an embodiment of FIG. 1. FIG. 4 is a graph showing distortion of an optical system according to an embodiment of FIG. 1.

[0109] FIG. 2 is a graph showing spherical aberration of an optical system (100) according to one embodiment of the present disclosure (e.g., the embodiment of FIG. 1). Spherical aberration may be a phenomenon in which the focal point of light passing through different parts of a lens (e.g., the chief portion and the marginal portion) changes. In FIG. 2, the horizontal axis represents the degree of longitudinal spherical aberration, and the vertical axis represents the distance from the center of the optical axis normalized, so that the change in longitudinal spherical aberration according to the wavelength of light may be illustrated. Longitudinal spherical aberration can be exhibited for light with wavelengths 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. Looking at FIG. 2, it can be seen that the longitudinal spherical aberration of the optical system (100) according to various embodiments of the present disclosure in the visible light band is limited to within approximately +0.050 to -0.050, showing stable optical characteristics. In particular, it can be seen that in the peripheral region of 0.5 field or more, it is limited to within +0.025 to -0.025, showing even more stable characteristics.

[0110] FIG. 3 is a graph showing astigmatism of an optical system (100) according to one embodiment (e.g., the embodiment of FIG. 1). Astigmatism may be a phenomenon where the focal points of light passing through the vertical and horizontal directions are misaligned when the tangential plane (or meridian plane) and the sagittal plane of the lens have different radii.

[0111] Here, the astigmatism of the optical system (100) is a result obtained at a wavelength of approximately 587.6000 nm, where the dashed line (T) represents astigmatism in the direction of the tangential plane (e.g., tangential plane curvature) and the solid line (S) represents astigmatism in the direction of the sagittal plane (e.g., sagittal plane curvature). As can be seen from the graph, according to various embodiments of the present disclosure, astigmatism is limited to within approximately +0.050 to -0.050, and stable optical characteristics can be observed.

[0112] FIG. 4 is a graph showing distortion of an optical system (100) according to one embodiment (e.g., the embodiment of FIG. 1). Distortion aberration occurs because the optical magnification changes depending on the distance from the optical axis, and the image formed on the actual image plane (img) may appear larger or smaller than the image formed on the theoretical image plane (img).

[0113] The distortion of the optical system (100) is the result obtained at a wavelength of approximately 587.6000 nm, and the image captured through the lens assembly may have distortion at a point (e.g., the periphery) off from the optical axis. However, such distortion is of a degree that can generally occur in an optical device using a lens, and the optical system (100) according to one embodiment (e.g., the embodiment of FIG. 1) can provide good optical characteristics with a distortion rate of approximately 2.5% (e.g., between -2.5% and 0%).

[0114] FIG. 5 is a schematic diagram showing an optical system according to one embodiment of the present disclosure. FIG. 6 is a graph showing spherical aberration of an optical system according to the embodiment of FIG. 5. FIG. 7 is a graph showing astigmatism of an optical system according to the embodiment of FIG. 5. FIG. 8 is a graph showing distortion of an optical system according to the embodiment of FIG. 5.

[0115] The description of the optical system (100) according to the embodiments described above may be applied to optical systems (200, 300, 400) according to various other embodiments described below. Some of the optical systems (100, 200, 300, 400) may have the same lens properties (e.g., angle of view, focal length, autofocus, F-number (F no), or optical zoom), or at least one lens assembly may have one or more lens properties different from the lens properties of other lens assemblies.

[0116] The optical systems (100, 200, 300, 400) may include a flash (flash (1820) of FIG. 18 described later), an image sensor (IS), an image stabilizer (image stabilizer (1840) of FIG. 18 described later), a memory (memory (1850) of FIG. 18 described later), or an image signal processor (image signal processor (1860) of FIG. 18 described later).

[0117] In describing the various embodiments of the present disclosure below, reference numbers in the drawings may be assigned similarly or omitted for components that can be easily understood through the aforementioned embodiments. Additionally, detailed descriptions thereof may be omitted to the extent that they may be redundant.

[0118] Referring to FIG. 5, the optical system (200) may have an inflection point, that is, an inflection point, on the upper side (S7) of the third lens (L3) positioned third from the subject side, where the central curvature near the optical axis (OI) and the peripheral curvature far from the optical axis have different signs. According to one embodiment, the optical system (200) may also have an inflection point formed on the subject side (S3) of the second lens (L2) positioned second from the subject side.

[0119] Referring together to FIGS. 5 to 8, an optical system (200) according to one other than the embodiment of FIG. 1 among various embodiments of the present disclosure may include a plurality of lenses (e.g., L1, L2, L3, L4, L5), an image sensor (IS), and / or a filter (F).

[0120] Table 4 below may show various lens data of the optical system (200) according to the embodiment of FIG. 5. Tables 5 and 6 below may each list the aspherical coefficients of the plurality of lenses (L1, L2, L3, L4, L5). Here, the lens assembly (200) may satisfy the above-described conditions (and / or at least one of the above-described conditions) when the composite effective focal length (EFL) is 8.0 mm, the F-number (Fno) is approximately 2.8, the angle of view (ANG) is approximately 32.62 degrees, and the image height (ImgH) of the image sensor (IS) is 2.28.

[0121] SurfaceRadiusThicknessNdVdS11.7611.0931.497081.61S2-13.0080.082S3-28.19 50.2301.602628.26S45.3990.762StopInfinity0.648S6-5.5980.3121.534955.74S 76.0590.667S8-3.9720.7811.670719.24S9-4.3930.067S10-5.8930.9541.534955. 74S11-5.2880.128S12Infinity0.1101.514155.15S13Infinity1.200ImageInfinity

[0122] S1S2S3S4S6Y radius1.761-13.008-28.1955.399-5.598K-7.59759E-018.72630E+008.49712E+01-3.39433E+002.99547E+01A42.05754E-025.46620E-025.46877E-021.75660E-02-2.01157E-01A6-8.10192E-026.92422E-029.90129E-023.95457E-023.69944E+00A86.08772E-01-4.34720E-01-6.69253E-01-2.67877E-01-1.36902E+02A10-2.65168E+008.53144E-011.46261E+005.67136E-012.89452E+03A127.52017E+00-9.45707E-01-1.76695E+00-3.91108E-01-3.86534E+04A14-1.45448E+016.48054E-011.28268E+00-4.16634E-013.47298E+05A161.97589E+01-2.72043E-01-5.35564E-011.09175E+00-2.17802E+06A18-1.91663E+016.39153E-021.01297E-01-9.56979E-019.72230E+06A201.33372E+01-6.41408E-033.06993E-034.00133E-01-3.10786E+07A22-6.60506E+000.00000E+00-2.93103E-03-6.65312E-027.06285E+07A242.27164E+000.00000E+000.00000E+000.00000E+00-1.11402E+08A26-5.15525E-010.00000E+000.00000E+000.00000E+001.15922E+08A286.93889E-020.00000E+000.00000E+000.00000E+00-7.15564E+07A30-4.19367E-030.00000E+000.00000E+000.00000E+001.98443E+07

[0123] S7S8S9S10S11Y radius6.059-3.972-4.393-5.893-5.288K-4.56585E+01-3.88395E+01-1.62594E+01-9.15753E+00-9.90000E+01A4-1.23622E-01-1.41625E-01-2.17096E-01-2.25143E-01-1.15676E-01A64.22633E-01-1.02500E-015.16839E-016.26101E-011.40279E-01A8-8.41865E+002.39762E+00-6.65153E-01-9.64084E-01-2.16451E-01A101.06993E+02-1.78685E+01-3.36849E-011.08852E+003.46040E-01A12-8.70316E+027.97820E+013.53798E+00-1.53295E+00-4.93263E-01A144.76474E+03-2.40066E+02-9.19048E+002.44199E+005.48056E-01A16-1.79513E+045.04716E+021.50596E+01-2.89071E+00-4.50065E-01A184.66273E+04-7.51970E+02-1.69852E+012.29868E+002.69430E-01A20-8.19450E+047.95697E+021.33940E+01-1.23528E+00-1.16758E-01A229.24105E+04-5.92538E+02-7.36013E+004.51677E-013.61357E-02A24-5.76995E+043.03022E+022.76121E+00-1.10952E-01-7.76939E-03A268.31989E+03-1.01184E+02-6.74275E-011.75380E-021.10037E-03A281.13708E+041.98485E+019.65987E-02-1.61240E-03-9.21388E-05A30-5.14457E+03-1.73322E+00-6.15953E-036.55373E-053.44977E-06

[0124] FIG. 6 is a graph showing the spherical aberration of an optical system (200) according to one embodiment of the present disclosure (e.g., the embodiment of FIG. 5). As with FIG. 2, longitudinal spherical aberration can be shown for light with wavelengths of approximately 656.3000 nm (nanometer), approximately 587.6000 nm, approximately 546.1000 nm, approximately 486.1000 nm, or approximately 435.8000 nm, respectively. Looking at FIG. 6, it can be seen that the longitudinal spherical aberration of the optical system (200) according to various embodiments of the present disclosure in the visible light band is limited to within approximately +0.050 to -0.050, showing stable optical characteristics. In particular, it can be confirmed that more stable characteristics are exhibited, with the astigmatism limited to within +0.025 to -0.025 in the peripheral region of 0.5 field or more. FIG. 7 is a graph showing the astigmatism of an optical system (200) according to one embodiment (e.g., the embodiment of FIG. 5). Here, the astigmatism of the lens assembly may be a result obtained at a wavelength of approximately 587.6000 nm. As can be seen from the graph, it can be confirmed that stable optical characteristics are exhibited, with the astigmatism according to various embodiments of the present disclosure limited to within approximately +0.050 to -0.050.

[0125] FIG. 8 is a graph showing the distortion of an optical system (200) according to one embodiment (e.g., the embodiment of FIG. 5). The distortion of the lens assembly may be a result obtained at a wavelength of approximately 587.6000 nm. However, such distortion is of a degree that may generally occur in an optical device using a lens, and the optical system (200) according to one embodiment (e.g., the embodiment of FIG. 5) may provide good optical characteristics with a distortion rate of approximately less than 2.5% (e.g., between -2.5% and 0%).

[0126] FIG. 9 is a schematic diagram showing an optical system according to one embodiment of the present disclosure. FIG. 10 is a graph showing spherical aberration of an optical system according to the embodiment of FIG. 9. FIG. 11 is a graph showing astigmatism of an optical system according to the embodiment of FIG. 9. FIG. 12 is a graph showing distortion of an optical system according to the embodiment of FIG. 9.

[0127] Referring to FIGS. 9 through 12, an optical system (300) according to another embodiment of the present disclosure may include a plurality of lenses (L1, L2, L3, L4), an image sensor (IS), and / or a filter (F). In the embodiment of FIGS. 9 through 12, unlike the optical systems (100, 200) of the preceding two embodiments, an optical system (300) comprising a lens assembly composed of four lenses may be described.

[0128] According to one embodiment, when the lenses included in the optical system (300) are composed of four lenses, at least one surface having an inflection shape is set on the third lens (e.g., third lens (L3)) or the fourth lens (e.g., fourth lens (L4)) from the subject side to correct astigmatism and curvature aberration. According to one embodiment, as shown in FIG. 9, an inflection point may be formed on the surface (S7) facing the upper side of the third lens (L3) in the optical system (300). According to one embodiment, an inflection point may also be formed on the surface (S9) facing the upper side of the fourth lens (L4) in the optical system (300).

[0129] In the case of an optical system (300) including four lenses, the first lens (L1) may be made of glass material, and the remaining lenses (L2, L3, L4) may be made of synthetic resin (e.g., plastic) material.

[0130] [Table 7] below may show various lens data of the optical system (300), and [Table 8] below may list the aspherical coefficients of the plurality of lenses (L1, L2, L3, L4), respectively. Here, the optical system (300) may satisfy the above-described conditions (and / or at least one of the above-described conditions) when the composite effective focal length (EFL) is 7.03 mm, the F-number (Fno) is approximately 2.4, the angle of view (ANG) is approximately 36.41, and the image height (ImgH) of the image sensor (IS) is 2.28.

[0131] SurfaceRadiusThicknessNdVdS11.6570.9661.497081.61S216.2870.540S310.4340.2301.649221.90S43.0210.414StopInfinity1.611S6-6.70 70.2301.544055.91S73.6140.281S814.6270.6261.670719.23S9-44.9410.092S10Infinity0.1101.516864.20S11Infinity0.723ImageInfinity

[0132] S1S2S3S4S6S7S8S9Y radius1.65716.28710.4343.021-6.7073.61414.627-44.941K-1.61665E-016.47468E+018.83564E+012.97352E+002.96473E+01-4.90989E+014.38540E+01-8.53593E+01A47.44110E-042.73607E-036.61734E-029.95760E-02-5.29826E-036.31288E-02-1.33946E-01-1.88743E-01A6-1.57132E-022.92477E-021.24752E-012.04365E-01-2.58923E+00-1.49854E+004.47895E-013.47377E-01A85.75628E-02-7.31929E-02-8.23682E-01-1.23588E+001.97055E+018.42457E+00-9.52091E-01-5.26167E-01A10-1.11564E-011.22601E-012.49113E+004.00457E+00-1.02959E+02-3.17909E+011.62033E+006.07055E-01A121.31509E-01-1.40763E-01-4.80270E+00-7.50834E+003.81162E+028.33680E+01-2.04729E+00-4.21001E-01A14-9.63072E-021.07253E-015.94114E+007.86069E+00-1.01612E+03-1.55268E+021.82129E+001.22877E-01A164.29113E-02-5.12315E-02-4.57717E+00-3.69594E+001.97110E+032.08105E+02-1.13824E+004.30156E-02A18-1.06565E-021.37934E-022.00485E+00-5.97312E-02-2.79444E+03-2.02076E+025.05355E-01-5.83256E-02A201.13526E-03-1.58485E-03-3.84072E-014.61905E-012.88770E+031.42047E+02-1.60440E-012.73712E-02A220.00000E+000.00000E+000.00000E+000.00000E+00-2.14846E+03-7.14856E+013.62526E-02-7.51192E-03A240.00000E+000.00000E+000.00000E+000.00000E+001.12024E+032.50864E+01-5.70804E-031.30154E-03A260.00000E+000.00000E+000.00000E+000.00000E+00-3.88456E+02-5.82613E+005.96864E-04-1.40378E-04A280.00000E+000.00000E+000.00000E+000.00000E+008.04842E+018.04260E-01-3.73543E-058.61832E-06A300.00000E+000.00000E+000.00000E+000.00000E+00-7.54466E+00-4.99338E-021.06153E-06-2.30037E-07.

[0133] FIG. 10 is a graph showing the spherical aberration of an optical system (300) according to one embodiment of the present disclosure (e.g., the embodiment of FIG. 9). As with FIG. 2, longitudinal spherical aberration can be shown for light with wavelengths of approximately 656.3000 nm (nanometer), approximately 587.6000 nm, approximately 546.1000 nm, approximately 486.1000 nm, or approximately 435.8000 nm, respectively. Looking at FIG. 10, it can be seen that the longitudinal spherical aberration of the optical system (300) according to various embodiments of the present disclosure in the visible light band is limited to within approximately +0.050 to -0.050, showing stable optical characteristics. In particular, it can be confirmed that more stable characteristics are exhibited, with the astigmatism limited to within +0.025 to -0.025 in the peripheral region of 0.5 field or more. FIG. 11 is a graph showing the astigmatism of an optical system (300) according to one embodiment (e.g., the embodiment of FIG. 9). Here, the astigmatism of the lens assembly may be a result obtained at a wavelength of approximately 587.6000 nm. As can be seen from the graph, it can be confirmed that stable optical characteristics are exhibited, with the astigmatism according to various embodiments of the present disclosure limited to within approximately +0.050 to -0.050.

[0134] FIG. 12 is a graph showing the distortion of an optical system (300) according to one embodiment (e.g., the embodiment of FIG. 9). The distortion of the lens assembly may be a result obtained at a wavelength of approximately 587.6000 nm. However, such distortion is of a degree that may generally occur in an optical device using a lens, and the optical system (300) according to one embodiment (e.g., the embodiment of FIG. 9) may provide good optical characteristics with a distortion rate of approximately less than 2.5% (e.g., between -2.5% and 0%).

[0135] FIG. 13 is a schematic diagram showing an optical system according to one embodiment of the present disclosure. FIG. 14 is a graph showing spherical aberration of an optical system according to the embodiment of FIG. 13. FIG. 15 is a graph showing astigmatism of an optical system according to the embodiment of FIG. 13. FIG. 16 is a graph showing distortion of an optical system according to the embodiment of FIG. 13.

[0136] Referring to FIGS. 13 to 16, an optical system (400) according to another embodiment of the present disclosure may include a plurality of lenses (e.g., L1, L2, L3, L4, L5), an image sensor (IS), and / or a filter (F).

[0137] Referring to FIG. 13, the optical system (400) may have an inflection point, i.e., an inflection point, on the image side (S7) of the third lens (L3) positioned third from the subject side, where the central curvature near the optical axis (OI) and the peripheral curvature far from the optical axis have different signs. According to one embodiment, the optical system (400) may also have an inflection point formed on the subject side (S3) of the second lens (L2) positioned second from the subject side. According to one embodiment, the optical system (400) may also have an inflection point formed on the subject side (S8) and image side (S9) of the fourth lens (L4) positioned fourth from the subject side, and on the subject side (S10) and image side (S11) of the fifth lens (L5) positioned fifth from the subject side.

[0138] Table 9 below may show various lens data of the optical system (400). Tables 10 and 11 below may each list the aspherical coefficients of multiple lenses (e.g., L1, L2, L3, L4, L5). Here, the optical system (400) may satisfy the above-described conditions (and / or at least one of the above-described conditions) when the composite effective focal length (EFL) is 4.6, the F-number (Fno) is 2.2, the angle of view (ANG) is 54.9, and the image height (ImgH) of the image sensor (IS) is 2.4.

[0139] SurfaceRadiusThicknessNdVdS11.6771.0561.49781.61S2-14.3810.058S3-53.66 70.2301.650321.52S46.7810.564StopInfinity0.428S6-15.4160.2671.53555.75S 79.7700.244S85.6300.5821.670719.23S94.6410.117S102.4420.6001.53555.75S 111.8980.079S12Infinity0.1101.51764.2S13Infinity0.678ImageInfinity0.022

[0140] S1S2S3S4S6Y radius1.677-1.4381-53.6676.781-15.416K-8.024294E-015.828006E+019.900000E+01-1.054232E+00-4.091446E+01A47.811387E-031.062429E-019.926177E-023.736541E-02-2.361562E-01A69.083285E-02-3.116977E-01-2.951388E-01-1.648676E-017.197378E+00A8-5.503243E-017.096891E-016.339819E-017.973316E-01-2.044098E+02A102.162060E+00-1.093914E+00-6.894393E-01-2.635908E+003.599243E+03A12-5.726780E+001.109694E+00-3.513354E-026.163545E+00-4.210971E+04A141.061663E+01-7.292723E-011.110193E+00-1.017239E+013.416395E+05A16-1.408786E+012.991767E-01-1.456178E+001.151665E+01-1.973289E+06A181.353659E+01-6.986024E-029.184941E-01-8.423171E+008.226626E+06A20-9.431119E+007.111695E-03-2.967775E-013.546681E+00-2.481378E+07A224.715923E+000.000000E+003.943125E-02-6.471817E-015.361664E+07A24-1.649134E+000.000000E+000.000000E+000.000000E+00-8.085669E+07A263.828500E-010.000000E+000.000000E+000.000000E+008.075464E+07A28-5.300700E-020.000000E+000.000000E+000.000000E+00-4.796023E+07A303.312486E-030.000000E+000.000000E+000.000000E+001.281225E+07.

[0141] S7S8S9S10S11Y radius9.7705.6304.6412.4421.898K-4.400589E+011.579488E+01-2.340687E+01-5.754277E+01-2.170997E+01A4-2.513493E-02-9.472988E-03-1.900869E-01-1.329205E-011.976894E-02A6-2.479218E+006.484801E-029.793350E-01-2.868297E-01-5.816611E-01A85.399555E+01-1.972239E+00-3.435335E+001.877312E+001.848021E+00A10-7.263377E+021.309195E+019.286764E+00-5.361987E+00-3.916217E+00A126.337882E+03-6.250369E+01-2.063903E+019.805743E+005.881502E+00A14-3.777902E+042.149940E+023.600539E+01-1.266494E+01-6.376074E+00A161.588366E+05-5.273690E+02-4.744026E+011.192067E+015.025776E+00A18-4.789332E+059.210763E+024.628144E+01-8.199706E+00-2.885087E+00A201.039918E+06-1.142031E+03-3.298072E+014.090062E+001.200892E+00A22-1.612010E+069.935982E+021.687301E+01-1.456880E+00-3.575532E-01A241.739901E+06-5.909054E+02-6.017746E+003.603428E-017.405056E-02A26-1.241988E+062.281528E+021.417801E+00-5.872027E-02-1.011463E-02A285.269269E+05-5.143601E+01-1.980547E-015.664356E-038.180627E-04A30-1.005817E+055.131955E+001.240897E-02-2.448768E-04-2.964412E-05.

[0142] FIG. 14 is a graph showing the spherical aberration of an optical system (400) according to one embodiment of the present disclosure (e.g., the embodiment of FIG. 13). As with FIG. 2, longitudinal spherical aberration can be shown for light with wavelengths of approximately 656.3000 nm (nanometer), approximately 587.6000 nm, approximately 546.1000 nm, approximately 486.1000 nm, or approximately 435.8000 nm, respectively. Looking at FIG. 14, it can be seen that the longitudinal spherical aberration of the optical system (400) according to various embodiments of the present disclosure in the visible light band is limited to within approximately +0.025 to -0.025, showing stable optical characteristics. FIG. 15 is a graph showing the astigmatism of an optical system (400) according to one embodiment (e.g., the embodiment of FIG. 13). Here, the astigmatism of the lens assembly may be the result obtained at a wavelength of approximately 587.6000 nm. As can be seen from the graph, according to various embodiments of the present disclosure, the astigmatism is limited to approximately +0.050 to -0.050, and stable optical characteristics can be observed.

[0143] FIG. 16 is a graph showing the distortion of an optical system (400) according to one embodiment (e.g., the embodiment of FIG. 13). The distortion of the lens assembly may be a result obtained at a wavelength of approximately 587.6000 nm. However, such distortion is of a degree that may generally occur in an optical device using a lens, and the optical system (400) according to one embodiment (e.g., the embodiment of FIG. 13) may provide good optical characteristics with a distortion rate of approximately less than 2.5% (e.g., between -2.5% and +2.5%).

[0144] Table 12 below may show the numerical values ​​of the aforementioned Equations 1 to 6 for the optical systems (100, 200, 300, 400) according to FIGS. 1 to 16. Referring to Table 12, Example 1 may represent the examples of FIGS. 1 to 4, Example 2 may represent the examples of FIGS. 5 to 8, Example 3 may represent the examples of FIGS. 9 to 12, and Example 4 may represent the examples of FIGS. 13 to 16. It can be seen that the optical systems (100, 200, 300, 400) satisfy the aforementioned Equations 1 to 6.

[0145] Example 1 Example 2 Example 3 Example 4 Formula 181.6181.6181.6181.61 Formula 21.65041.60251.64921.6504 Formula 336.3132.6236.4154.9 Formula 42.5433.0812.5442.098 Formula 560.0953.3559.7160.09 Formula 636.536.536.6836.52

[0146] The optical system (100, 200, 300, 400) of the present disclosure relates to an optical system with a small angle of view, such as a telephoto lens, and by applying a glass material having relatively low dispersion properties to the first lens (e.g., the first lens (L1)) from the subject side, effective chromatic aberration correction can be achieved, as well as comply with the trend of miniaturization of electronic devices. The optical system (100, 200, 300, 400) of the present disclosure may enable focus adjustment (e.g., autofocusing (AF)) by changing the position of the entire lens assembly or image sensor included in the optical system along the optical axis. Additionally, the optical system (100, 200, 300, 400) of the present disclosure may enable optical image stabilizer (OIS) by allowing the entire lens assembly or image sensor included in the optical system to be moved in a direction perpendicular to the optical axis.

[0147] FIG. 17 is a block diagram of an electronic device in a network environment according to various embodiments. FIG. 18 is a block diagram illustrating a camera module according to various embodiments.

[0148] FIG. 17 is a block diagram of an electronic device (1701) (e.g., an optical device) in a network environment (1700) according to various embodiments. Referring to FIG. 17, in the network environment (1700), the electronic device (1701) (e.g., an optical device) may communicate with an electronic device (1702) through a first network (1798) (e.g., a short-range wireless communication network) or may communicate with at least one of an electronic device (1704) or a server (1708) through a second network (1799) (e.g., a long-range wireless communication network). According to one embodiment, the electronic device (1701) may communicate with the electronic device (1704) through the server (1708). According to one embodiment, the electronic device (1701) may include a processor (1720), memory (1730), input module (1750), sound output module (1755), display module (1760), audio module (1770), sensor module (1776), interface (1777), connection terminal (1778), haptic module (1779), camera module (1780), power management module (1788), battery (1789), communication module (1790), subscriber identification module (1796), or antenna module (1797). In some embodiments, at least one of these components (e.g., display device (1760) or camera module (1780)) may be omitted from the electronic device (1701), or one or more other components may be added. In some embodiments, some of these components (e.g., sensor module (1776), camera module (1780), or antenna module (1797)) may be integrated into a single component (e.g., display module (1760)).

[0149] The processor (1720) can, for example, execute software (e.g., program (1740)) to control at least one other component (e.g., hardware or software component) of the electronic device (1701) connected to the processor (1720) and can perform various data processing or operations. According to one embodiment, as at least part of the data processing or operations, the processor (1720) can store commands or data received from other components (e.g., sensor module (1776) or communication module (1790)) in volatile memory (1732), process the commands or data stored in volatile memory (1732), and store the resulting data in non-volatile memory (1734). According to one embodiment, the processor (1720) may include a main processor (1721) (e.g., a central processing unit or an application processor) or an auxiliary processor (1723) that can operate independently or together with it (e.g., a graphics processing unit, a neural processing unit (NPU), an image signal processor, a sensor hub processor, or a communication processor). For example, if the electronic device (1701) includes a main processor (1721) and an auxiliary processor (1723), the auxiliary processor (1723) may be configured to use less power than the main processor (1721) or to be specialized for a specified function. The auxiliary processor (1723) may be implemented separately from the main processor (1721) or as part thereof.

[0150] The auxiliary processor (1723) may control at least some of the functions or states associated with at least one component of the electronic device (1701) (e.g., display module (1760), sensor module (1776), or communication module (1790)) on behalf of the main processor (1721) while the main processor (1721) is in an inactive (e.g., sleep) state, or together with the main processor (1721) while the main processor (1721) is in an active (e.g., application execution) state. According to one embodiment, the auxiliary processor (1723) (e.g., image signal processor or communication processor) may be implemented as part of another functionally related component (e.g., camera module (1780) or communication module (1790)). According to one embodiment, the auxiliary processor (1723) (e.g., neural network processing unit) may include a hardware structure specialized for processing an artificial intelligence model. The artificial intelligence model may be generated through machine learning. Such learning may be performed, for example, on the electronic device (1700) itself where the artificial intelligence model is executed, or through a separate server (e.g., server (1708)). The learning algorithm may 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 may include a plurality of artificial neural network layers.An artificial neural network may be 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 the hardware structure, the artificial intelligence model may include a software structure, either additionally or substantially.

[0151] The memory (1730) can store various data used by at least one component of the electronic device (1701) (e.g., processor (1720) or sensor module (1776)). The data may include, for example, input data or output data for software (e.g., program (1740)) and related commands. The memory (1730) may include volatile memory (1732) or non-volatile memory (1734).

[0152] The program (1740) may be stored as software in memory (1730) and may include, for example, an operating system (1742), middleware (1744), or an application (1746).

[0153] The input module (1750) can receive commands or data to be used for a component of the electronic device (1701) (e.g., processor (1720)) from outside the electronic device (1701) (e.g., user). The input device (1750) may include, for example, a microphone, a mouse, a keyboard, a key (e.g., a button), or a digital pen (e.g., a stylus pen).

[0154] The sound output module (1755) can output a sound signal to the outside of the electronic device (1701). The sound output module (1755) may include, for example, a speaker or a receiver. The speaker may be used for general purposes, such as multimedia playback or recording playback. The receiver may be used to receive incoming calls. According to one embodiment, the receiver may be implemented separately from the speaker or as part thereof.

[0155] The display module (1760) can visually provide information to an external (e.g., user) of the electronic device (1701). The display module (1760) may include, for example, a display, a holographic device, or a projector and a control circuit for controlling said device. According to one embodiment, the display module (1760) may include a touch sensor configured to detect a touch, or a pressure sensor configured to measure the intensity of the force generated by said touch.

[0156] The audio module (1770) can convert sound into an electrical signal or, conversely, convert an electrical signal into sound. According to one embodiment, the audio module (1770) can acquire sound through the input module (1750) or output sound through the sound output module (1755) or an external electronic device (e.g., electronic device (1702)) (e.g., speaker or headphones) that is directly or wirelessly connected to the electronic device (1701).

[0157] The sensor module (1776) can detect the operating state of the electronic device (1701) (e.g., power or temperature) or the external environmental state (e.g., user state) and generate an electrical signal or data value corresponding to the detected state. According to one embodiment, the sensor module (1776) may include, for example, a gesture sensor, a gyroscope sensor, a barometric pressure sensor, a magnetic sensor, an accelerometer sensor, a grip sensor, a proximity sensor, a color sensor, an IR (infrared) sensor, a biosensor, a temperature sensor, a humidity sensor, or an illuminance sensor.

[0158] The interface (1777) may support one or more specified protocols that can be used for the electronic device (1701) to be connected directly or wirelessly to an external electronic device (e.g., electronic device (1702)). According to one embodiment, the interface (1777) may include, for example, a high definition multimedia interface (HDMI), a universal serial bus (USB) interface, an SD card interface, or an audio interface.

[0159] The connection terminal (1778) may include a connector through which the electronic device (1701) can be physically connected to an external electronic device (e.g., electronic device (1702)). According to one embodiment, the connection terminal (1778) may include, for example, an HDMI connector, a USB connector, an SD card connector, or an audio connector (e.g., a headphone connector).

[0160] The haptic module (1779) can convert an electrical signal into a mechanical stimulus (e.g., vibration or movement) or an electrical stimulus that the user can perceive through tactile or kinesthetic senses. According to one embodiment, the haptic module (1779) may include, for example, a motor, a piezoelectric element, or an electric stimulation device.

[0161] The camera module (1780) can capture still images and video. According to one embodiment, the camera module (1780) may include one or more lenses, image sensors, image signal processors, or flashes.

[0162] The power management module (1788) can manage the power supplied to the electronic device (1701). According to one embodiment, the power management module (1788) can be implemented, for example, as at least part of a power management integrated circuit (PMIC).

[0163] The battery (1789) can supply power to at least one component of the electronic device (1701). According to one embodiment, the battery (1789) may include, for example, a non-rechargeable primary battery, a rechargeable secondary battery, or a fuel cell.

[0164] The communication module (1790) can support the establishment of a direct (e.g., wired) communication channel or a wireless communication channel between an electronic device (1701) and an external electronic device (e.g., electronic device (1702), electronic device (1704), or server (1708)), and the performance of communication through the established communication channel. The communication module (1790) may include one or more communication processors that operate independently of the processor (1720) (e.g., application processor) and support direct (e.g., wired) communication or wireless communication. According to one embodiment, the communication module (1790) may include a wireless communication module (1792) (e.g., cellular communication module, short-range wireless communication module, or GNSS (global navigation satellite system) communication module) or a wired communication module (2194) (e.g., LAN (local area network) communication module, or power line communication module). The corresponding communication module among these communication modules can communicate with an external electronic device (1704) via a first network (1798) (e.g., a short-range communication network such as Bluetooth, WiFi (wireless fidelity) direct, or IrDA (infrared data association)) or a second network (1799) (e.g., 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 (1792) can identify or authenticate the electronic device (1701) within a communication network such as the first network (1798) or the second network (1799) using subscriber information (e.g., International Mobile Subscriber Identifier (IMSI)) stored in the subscriber identification module (1796).

[0165] The wireless communication module (1792) can support 5G networks and next-generation communication technologies following 4G networks, for example, new radio access technology. NR access technology can support high-speed transmission of high-capacity data (enhanced mobile broadband (eMBB)), minimization of terminal power and connection of multiple terminals (massive machine type communications (mMTC)), or high reliability and low latency (ultra-reliable and low-latency communications (URLLC)). The wireless communication module (1792) can support a high-frequency band (e.g., mmWave band) to achieve a high data transmission rate, for example. The wireless communication module (1792) can support various technologies for securing performance in the high-frequency band, such as beamforming, massive MIMO (multiple-input and multiple-output), full-dimensional MIMO (FD-MIMO), array antenna, analog beam-forming, or large-scale antenna. The wireless communication module (1792) can support various requirements specified in the electronic device (1701), external electronic device (e.g., electronic device (1704)), or network system (e.g., second network (1799)). According to one embodiment, the wireless communication module (1792) can support a Peak data rate (e.g., 20 Gbps or more) for realizing eMBB, loss coverage (e.g., 164 dB or less) for realizing mMTC, or U-plane latency (e.g., downlink (DL) and uplink (UL) each 0.5 ms or less, or round trip 1 ms or less) for realizing URLLC.

[0166] An antenna module (1797) can transmit a signal or power to or from an external source (e.g., an external electronic device). According to one embodiment, the antenna module (1797) may include a single antenna comprising a radiator made of a conductor or a conductive pattern formed on a substrate (e.g., a PCB). According to one embodiment, the antenna module (1797) may include a plurality of antennas (e.g., array antennas). In this case, at least one antenna suitable for a communication method used in a communication network, such as a first network (1798) or a second network (1799), may be selected from the plurality of antennas, for example, by a communication module (1790). A signal or power may be transmitted or received between the communication module (1790) and an external electronic device through the selected at least one antenna. According to some embodiments, in addition to the radiator, other components (e.g., a radio frequency integrated circuit (RFIC))) may be additionally formed as part of the antenna module (1797).

[0167] According to various embodiments, the antenna module (1797) may form a mmWave antenna module. According to one embodiment, the mmWave antenna module may include a printed circuit board, an RFIC disposed on or adjacent to a first surface (e.g., bottom surface) of the printed circuit board and capable of supporting a specified high frequency band (e.g., mmWave band), and a plurality of antennas (e.g., array antennas) disposed on or adjacent to a second surface (e.g., top surface or side surface) of the printed circuit board and capable of transmitting or receiving a signal of the specified high frequency band.

[0168] At least some of the above components can be connected to each other via a communication method between peripheral devices (e.g., bus, GPIO (general purpose input and output), SPI (serial peripheral interface), or MIPI (mobile industry processor interface)) and exchange signals (e.g., commands or data) with each other.

[0169] According to one embodiment, commands or data may be transmitted or received between an electronic device (1701) and an external electronic device (1704) through a server (1708) connected to a second network (1799). Each of the external electronic devices (1702, 1704) may be the same or a different type of device as the electronic device (1701). According to one embodiment, all or part of the operations performed on the electronic device (1701) may be performed on one or more of the external electronic devices (1702, 1704, or 1708). For example, if the electronic device (1701) needs to perform a function or service automatically or in response to a request from a user or another device, the electronic device (1701) may request one or more external electronic devices to perform at least part of the function or service instead of performing the function or service itself or additionally. One or more external electronic devices that receive the above request may execute at least part of the requested function or service, or additional function or service related to the request, and transmit the result of the execution to the electronic device (1701). The electronic device (1701) may provide the result as is or additionally processed as at least part of the response to the request. For this purpose, for example, cloud computing, distributed computing, mobile edge computing (MEC), or client-server computing technology may be used.

[0170] The electronic device (1701) may provide ultra-low latency services using, for example, distributed computing or mobile edge computing. In another embodiment, the external electronic device (1704) may include an Internet of Things (IoT) device. The server (1708) may be an intelligent server using machine learning and / or neural networks. According to one embodiment, the external electronic device (1704) or the server (1708) may be included within a second network (1799). The electronic device (1701) may be applied to intelligent services (e.g., smart home, smart city, smart car, or healthcare) based on 5G communication technology and IoT-related technology.

[0171] FIG. 18 is a block diagram (1800) illustrating a camera module (1880) (e.g., the camera module (1780) of FIG. 17) according to various embodiments. Referring to FIG. 18, the camera module (1880) may include a lens assembly (1810) (e.g., the lens assembly (100) of FIG. 1, the lens assembly (200) of FIG. 5, the lens assembly (300) of FIG. 9, the lens assembly (400) of FIG. 13), a flash (1820), an image sensor (1830) (e.g., the image sensor (IS) of FIG. 1, FIG. 5, FIG. 9, FIG. 13), an image stabilizer (1840), a memory (1850) (e.g., a buffer memory) (e.g., the memory (1730) of FIG. 17), or an image signal processor (1860). A lens assembly (1810) can collect light emitted from a subject that is the subject of image capture. The lens assembly (1810) may include one or more lenses. According to one embodiment, a camera module (1880) may include a plurality of lens assemblies (1810). In this case, the camera module (1880) may form, for example, a dual camera, a 360-degree camera, or a spherical camera. Some of the plurality of lens assemblies (1810) 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 different from the lens properties of other lens assemblies. The lens assembly (1810) may include, for example, a wide-angle lens or a telephoto lens.

[0172] A flash (1820) may emit light used to enhance light emitted or reflected from a subject. According to one embodiment, the flash (1820) may include one or more light-emitting diodes (e.g., RGB (red-green-blue) LED, white LED, infrared LED, or ultraviolet LED), or a xenon lamp. An image sensor (1830) may acquire an image corresponding to the subject by converting light emitted or reflected from the subject and transmitted through a lens assembly (1810) into an electrical signal. According to one embodiment, the image sensor (1830) may include, for example, one image sensor selected from image sensors with different properties such as an RGB sensor, a BW (black and white) sensor, an IR sensor, or a UV sensor, a plurality of image sensors having the same properties, or a plurality of image sensors having different properties. Each image sensor included in the image sensor (1830) can be implemented using, for example, a CCD (charged coupled device) sensor or a CMOS (complementary metal oxide semiconductor) sensor.

[0173] The image stabilizer (1840) may move at least one lens or image sensor (1830) included in the lens assembly (1810) in a specific direction in response to the movement of the camera module (1880) or the electronic device (1701) containing it, or control the operational characteristics of the image sensor (1830) (e.g., adjusting read-out timing). This allows for compensating for at least some of the negative effects caused by the movement on the image being captured. According to one embodiment, the image stabilizer (1840) may detect such movement of the camera module (1880) or the electronic device (1701) using a gyroscope sensor (not shown) or an accelerometer sensor (not shown) placed inside or outside the camera module (1880). According to one embodiment, the image stabilizer (1840) may be implemented, for example, as an optical image stabilizer. The memory (1850) may temporarily store at least a portion of the image acquired through the image sensor (1830) for the next image processing operation. For example, when image acquisition by the shutter is delayed or multiple images are acquired at high speed, the acquired original image (e.g., a Bayer-patterned image or a high-resolution image) is stored in the memory (1850), and the corresponding copy image (e.g., a low-resolution image) can be previewed through the display device (1760). Subsequently, when a specified condition is satisfied (e.g., user input or system command), at least a portion of the original image stored in the memory (1850) may be acquired and processed, for example, by an image signal processor (1860). According to one embodiment, the memory (1850) may be composed of at least a part of the memory (1830) or a separate memory that operates independently thereof.

[0174] The image signal processor (1860) can perform one or more image processing operations on an image acquired through the image sensor (1830) or an image stored in memory (1850). One or more of the above image processing methods may include, for example, depth map generation, 3D modeling, panorama generation, feature point extraction, image synthesis, or image compensation (e.g., noise reduction, resolution adjustment, brightness adjustment, blurring, sharpening, or softing). Additionally or generally, the image signal processor (1860) may perform control (e.g., exposure time control, or readout timing control, etc.) over at least one of the components included in the camera module (1880) (e.g., image sensor (1830)). The image processed by the image signal processor (1860) may be stored back in memory (1850) for further processing or provided to an external component of the camera module (1880) (e.g., memory (1730), display device (1760), electronic device (1702), electronic device (1704), or server (1708)). According to one embodiment, the image signal The processor (1860) may be composed of at least a part of the processor (1720) or may be composed of a separate processor that operates independently of the processor (1720). If the image signal processor (1860) is composed of a separate processor from the processor (1720), at least one image processed by the image signal processor (1860) may be displayed through the display device (1860) as is or after additional image processing by the processor (1820).

[0175] According to one embodiment, the electronic device (1701) may include a plurality of camera modules (1880) each having different attributes or functions. In this case, for example, at least one of the plurality of camera modules (1880) 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 (1880) may be a front camera and at least another may be a rear camera.

[0176] The electronic device according to the various embodiments of the present disclosure may be a device of various forms. The electronic device may include, for example, a portable communication device (e.g., a smartphone), a computer device, a portable multimedia device, a portable medical device, a camera, a wearable device, or a consumer electronics device. The electronic device according to the embodiments of the present disclosure is not limited to the devices described above.

[0177] The various embodiments of the present disclosure and the terms used therein are not intended to limit the technical features described in the present disclosure to specific embodiments, and should be understood to include various modifications, equivalents, or substitutions of said 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 said items unless the relevant context clearly indicates otherwise. In the present disclosure, each of phrases such as “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” may 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 simply to distinguish a component from another component and do not limit the components in any other aspect (e.g., importance or order). Where any (e.g., first) component is referred to as “coupled” or “connected” to another (e.g., second) component, with or without the terms “functionally” or “communicationally,” it means that said component may be connected to said other component directly (e.g., wired), wirelessly, or through a third component.

[0178] 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, for example. A module may be a component formed integrally, or a minimum unit of said component or a part thereof 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).

[0179] Various embodiments of the present disclosure may be implemented as software (e.g., program (1740)) comprising one or more instructions stored in a storage medium (e.g., internal memory (2136) or external memory (2138)) readable by a machine (e.g., electronic device (1701)). For example, a processor (e.g., processor (1720)) of the machine (e.g., electronic device (1701)) may call at least one of the one or more instructions stored from the storage medium and execute it. This enables the machine to be operated to perform at least one function according to the at least one called instruction. The one or more instructions may include code generated by a compiler or code that can be executed by an interpreter. The storage medium readable by the machine may be provided in the form of a non-transitory storage medium. Here, 'non-temporary' merely means that the storage medium is a tangible device and does not contain a signal (e.g., electromagnetic waves), and this term does not distinguish between cases where data is stored semi-permanently and cases where it is stored temporarily.

[0180] According to one embodiment, the method according to various embodiments of the present disclosure may be provided by being included in a computer program product. The computer program product may be traded between a seller and a buyer 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 an application store (e.g., Play Store). TM It can be distributed online (e.g., downloaded or uploaded) through ) or directly between two user devices (e.g., smartphones). In the case of online distribution, at least a portion of the computer program product may be temporarily stored or temporarily created on a device-readable storage medium, such as the memory of a manufacturer's server, an application store's server, or a relay server.

[0181] According to various embodiments, each component (e.g., module or program) of the components described above may include a singular or multiple entities, and some of the multiple entities may be separated and placed in other components. According to various embodiments, one or more of the components or operations of the aforementioned components may be omitted, or one or more other components or operations may be added. Generally or additionally, multiple components (e.g., module or program) may be integrated into a single component. In this case, the integrated component may perform one or more functions of each of the multiple components in the same or similar manner as those performed by the corresponding component among the multiple components prior to integration. According to various embodiments, operations performed by the module, program, or other components 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.

[0182] According to one embodiment of the present disclosure, an electronic device including an optical system may be provided. The optical system (100; 200; 300; 400) may include an image sensor (IS); and a lens assembly comprising at least four lenses arranged sequentially along an optical axis (OI) direction from the object side (obj) toward the image side of the image sensor. The lens assembly may include a first lens (L1) positioned at the first object side and having a positive refractive power, a second lens (L2) positioned at the second object side and having a negative refractive power, and the image side of a third lens (L3) positioned at the third object side may have an inflection shape in which the sign of the central curvature near the optical axis and the sign of the peripheral curvature far from the optical axis are different. The optical system may satisfy the following [Equation 1], [Equation 2], and [Equation 3].

[0183] [Equation 1]

[0184] 70 < Vd1 < 100

[0185] [Equation 2]

[0186] 1.5 < Nd2 < 1.75

[0187] [Equation 3]

[0188] FOV < 60

[0189] (Here, Vd1 is the Abbe number of the first lens from the subject side, Nd2 is the refractive index of the second lens from the subject side, and FOV is the angle of view of the entire optical system.)

[0190] According to one embodiment, the first lens (L1) comprises a glass material, and the remaining lenses in the lens assembly, excluding the first lens (L1), may comprise a resin material.

[0191] According to one embodiment, the ratio of the total length of the optical system to the maximum height value of the upper surface of the image sensor can satisfy the following [Equation 4].

[0192] [Equation 4]

[0193] 2 < OAL / IH < 3.5

[0194] (Here, OAL is the total length of the optical system, and IH is the maximum height value of the upper surface of the image sensor)

[0195] According to one embodiment, the third lens may have a negative refractive power.

[0196] According to one embodiment, the difference between the Abbe number of the first lens and the Abbe number of the second lens can satisfy the following [Equation 5].

[0197] [Equation 5]

[0198] 45 < Vd1 - Vd2 < 65

[0199] (Here, Vd1 is the Abbe number of the first lens, Vd2 is the Abbe number of the second lens)

[0200] According to one embodiment, the subject side surface of the first lens may be formed convexly toward the subject side.

[0201] According to one embodiment, the second lens may have a meniscus shape that is concave in both directions toward the subject side and the image side, or convex toward the subject side.

[0202] According to one embodiment, the difference between the Abbe number of the third lens and the Abbe number of the fourth lens can satisfy the following [Equation 6].

[0203] [Equation 6]

[0204] 30 < Vd3 - Vd4 < 40

[0205] (Here, Vd3 is the Abbe number of the third lens, Vd4 is the Abbe number of the fourth lens)

[0206] According to one embodiment, a fourth lens that is the fourth from the subject side and a fifth lens that is the fifth from the subject side may be further included. The shape of the fourth lens may include an optical system having a meniscus shape that is convex toward the upper side.

[0207] According to one embodiment, a fourth lens that is the fourth from the subject side and a fifth lens that is the fifth from the subject side may be further included. The shape of the fifth lens may have a meniscus shape that is convex toward the subject side or toward the upper side.

[0208] According to one embodiment, the third lens or the fourth lens, which is the fourth from the subject side, may include at least one surface having an inflection shape.

[0209] According to one embodiment, the optical system may further include an actuator configured to move the image sensor or the lens assembly along the optical axis (OI), and may be configured to perform a focus adjustment operation by moving the image sensor or the lens assembly along the optical axis (OI).

[0210] According to one embodiment, the optical system may further include an actuator configured to move the image sensor or the lens assembly in a direction intersecting the optical axis (OI), and may be configured to perform optical image stabilization (OIS) by moving the image sensor or the lens assembly in a direction intersecting the optical axis (OI).

[0211] According to one embodiment, the electronic device includes an optical system having N times telephoto performance and an optical system having M times telephoto performance with a higher magnification than N times, and the optical system according to any one of claims 1 to 13 may be applied to the optical system having N times telephoto performance.

[0212] According to one embodiment of the present disclosure, an electronic device including an optical system may be provided. The optical system (100; 200; 300; 400) may include an image sensor (IS); and a lens assembly comprising at least four lenses arranged sequentially along an optical axis (OI) direction from the object side (obj) toward the image side of the image sensor. The lens assembly may include a first lens (L1) positioned at the first object side and having a positive refractive power, and a second lens (L2) positioned at the second object side and having a negative refractive power. The first lens (L1) may be made of a glass material, and the remaining lenses in the lens assembly, excluding the first lens (L1), may be made of a resin material. The optical system may satisfy the following [Equation 1], [Equation 2], and [Equation 3].

[0213] [Equation 1]

[0214] 70 < Vd1 < 100

[0215] [Equation 2]

[0216] 1.5 < Nd2 < 1.75

[0217] [Equation 3]

[0218] FOV < 60

[0219] (Here, Vd1 is the Abbe number of the first lens from the subject side, Nd2 is the refractive index of the second lens from the subject side, and FOV is the angle of view of the entire optical system.)

[0220] According to one embodiment, the image side of the third lens (L3) positioned third from the subject side may include an optical system having an inflection shape in which the sign of the curvature of the center near the optical axis and the sign of the curvature of the peripheral part far from the optical axis are different.

[0221] According to one embodiment, the ratio of the total length of the optical system to the maximum height value of the upper surface of the image sensor can satisfy the following [Equation 4].

[0222] [Equation 4]

[0223] 2 < OAL / IH < 3.5

[0224] (Here, OAL is the total length of the optical system, and IH is the maximum height value of the upper surface of the image sensor)

[0225] According to one embodiment, the third lens may have a negative refractive power.

[0226] According to one embodiment, the difference between the Abbe number of the first lens and the Abbe number of the second lens can satisfy the following [Equation 5].

[0227] [Equation 5]

[0228] 45 < Vd1 - Vd2 < 65

[0229] (Here, Vd1 is the Abbe number of the first lens, Vd2 is the Abbe number of the second lens)

[0230] According to one embodiment, the difference between the Abbe number of the third lens and the Abbe number of the fourth lens can satisfy the following [Equation 6].

[0231] [Equation 6]

[0232] 30 < Vd3 - Vd4 < 40

[0233] (Here, Vd3 is the Abbe number of the third lens, Vd4 is the Abbe number of the fourth lens)

[0234] The effects obtainable from the present disclosure are not limited to those mentioned above, and other unmentioned effects will be clearly understood by those skilled in the art to which the present disclosure belongs.

[0235] Although the present disclosure has been described by way of example with respect to one embodiment, it should be understood that various embodiments are for illustrative purposes only and are not limiting. It will be obvious to those skilled in the art that various changes in form and detailed configuration may be made without departing from the whole context of the present disclosure, including the appended claims and their equivalents.

Claims

In an electronic device including an optical system, The optical system (100; 200; 300; 400) comprises an image sensor (IS); and a lens assembly comprising at least four lenses arranged sequentially along an optical axis (OI) direction from the object side (obj) toward the image side of the image sensor, wherein the lens assembly comprises a first lens (L1) positioned at the first object side and having positive refractive power, a second lens (L2) positioned at the second object side and having negative refractive power, and the image side of a third lens (L3) positioned at the third object side has an inflection shape in which the sign of the central curvature near the optical axis and the sign of the peripheral curvature far from the optical axis are different. An electronic device comprising an optical system satisfying the following [Equation 1], [Equation 2] and [Equation 3]. [Equation 1] 70 < Vd1 < 100 [Equation 2] 1.5 < Nd2 < 1.75 [Equation 3] FOV < 60 (Here, Vd1 is the Abbe number of the first lens from the subject side, Nd2 is the refractive index of the second lens from the subject side, and FOV is the angle of view of the entire optical system.) In Article 1, The first lens (L1) comprises a glass material, and the remaining lenses in the lens assembly, excluding the first lens (L1), comprise a resin material. An electronic device including an optical system. In Article 1, The ratio of the total length of the optical system to the maximum height value of the upper surface of the image sensor satisfies the following [Equation 4], An electronic device including an optical system. [Equation 4] 2 < OAL / IH < 3.5 (Here, OAL is the total length of the optical system, and IH is the maximum height value of the upper surface of the image sensor) In any one of paragraphs 1 to 3, The above third lens has a negative refractive power, An electronic device including an optical system. In any one of paragraphs 1 to 4, The difference between the Abbe number of the first lens and the Abbe number of the second lens satisfies the following [Equation 5], An electronic device including an optical system. [Equation 5] 45 < Vd1 - Vd2 < 65 (Here, Vd1 is the Abbe number of the first lens, Vd2 is the Abbe number of the second lens) In any one of paragraphs 1 to 5, The subject side surface of the first lens is formed convexly toward the subject side. An electronic device including an optical system. In any one of paragraphs 1 to 6, The second lens has a meniscus shape that is concave in both directions toward the subject side and the image side, or convex toward the subject side. An electronic device including an optical system. In any one of paragraphs 1 to 7, The difference between the Abbe number of the third lens and the Abbe number of the fourth lens satisfies the following [Equation 6], An electronic device including an optical system. [Equation 6] 30 < Vd3 - Vd4 < 40 (Here, Vd3 is the Abbe number of the third lens, Vd4 is the Abbe number of the fourth lens) In any one of paragraphs 1 through 8, It further includes a fourth lens that is the fourth from the subject side and a fifth lens that is the fifth from the subject side, The shape of the fourth lens above is an electronic device comprising an optical system having a meniscus shape that is convex toward the upper side. In any one of paragraphs 1 through 9, It further includes a fourth lens that is the fourth from the subject side and a fifth lens that is the fifth from the subject side, The shape of the fifth lens above has a meniscus shape that is convex toward the subject or toward the top. An electronic device including an optical system. In any one of Articles 1 to 10, The third lens or the fourth lens, which is the fourth from the subject side, includes at least one surface having an inflection shape. An electronic device including an optical system. In any one of paragraphs 1 to 11, An electronic device further comprising an actuator configured to move the image sensor or the lens assembly along the optical axis (OI), and configured to perform a focus adjustment operation of the optical system by moving the image sensor or the lens assembly along the optical axis (OI). In any one of paragraphs 1 to 12, An electronic device further comprising an actuator configured to move the image sensor or the lens assembly in a direction intersecting the optical axis (OI), and configured to perform optical image stabilization (OIS) of the optical system by moving the image sensor or the lens assembly in a direction intersecting the optical axis (OI). The electronic device comprises an optical system having N times telephoto performance and an optical system having M times telephoto performance with a magnification higher than N times, and the optical system according to any one of claims 1 to 13 is applied to the optical system having N times telephoto performance. An electronic device including an optical system.

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