Lens assembly

Abstract

A lens assembly includes: a plurality of lens arrays arranged sequentially from the object side toward the image side, wherein each lens array includes a plurality of lenses, and the plurality of lenses included in the lens array arranged closest to the image side have a length in a first axial direction perpendicular to the optical axis than in a second axial direction perpendicular to both the optical axis and the first axial direction.

Description

Technical Field

[0001] [Cross-reference to related applications]

[0002] This application claims priority over Korean Patent Application No. 10-2021-0071786, filed with the Korean Intellectual Property Office on June 2, 2021, and Korean Patent Application No. 10-2021-0190120, filed with the Korean Intellectual Property Office on December 28, 2021, the entire disclosure of which is incorporated herein by reference for all purposes.

[0003] This disclosure relates to a lens assembly and a camera module including the lens assembly. Prior Technology

[0004] Recently, camera modules have been used in portable electronic devices such as smartphones, tablet PCs, and laptops.

[0005] In addition, in recent years, in order to capture high-resolution images and videos, the number of pixels in image sensors has increased, and the size of the image sensors themselves has also increased. Furthermore, the number of lenses has also increased.

[0006] Therefore, the size of the camera module has increased, which has led to the problem of the camera module itself being a prominent portable electronic device.

[0007] The above information is provided as background information to aid understanding of this disclosure. No determination or assertion is made as to whether any of the above content is suitable as prior art to this disclosure. Summary of the Invention

[0008] The purpose of this invention is to provide a simplified description of a series of concepts that will be further elaborated in the following embodiments. This invention is not intended to identify key or essential features of the claimed object, nor is it intended to assist in determining the scope of the claimed object.

[0009] In a general configuration, a lens assembly includes multiple lens arrays arranged sequentially from the object side toward the image side, wherein each lens array includes multiple lenses, and the multiple lenses included in the lens array arranged closest to the image side have a length in a first axial direction perpendicular to the optical axis than in a second axial direction perpendicular to both the optical axis and the first axial direction.

[0010] The plurality of lens arrays may include a first lens array and a second lens array. A protrusion may be provided in either the first lens array or the second lens array, and a recess may be provided in the other of the first lens array and the second lens array. The protrusion and the recess may contact each other for coupling.

[0011] The surfaces of the protrusions and recesses that face each other in a direction perpendicular to the optical axis can be inclined curved surfaces.

[0012] The protrusion may have a truncated conical shape.

[0013] The diameter of the protrusion and the depression can gradually decrease in the direction from the protrusion to the depression.

[0014] The height of the protrusion can be greater than the depth of the recess.

[0015] The protrusions and recesses can each be positioned within the area surrounded by the plurality of lenses.

[0016] Among the plurality of lenses included in the lens array positioned closest to the image side, when viewed in the optical axis direction, the side surfaces facing each other in the second axis direction may have a linear shape.

[0017] In the lens array located closest to the image side, the ratio of the length in the second axis direction to the length in the first axis direction can be greater than 0.5 and less than 1.

[0018] In the multiple lens arrays that are arranged adjacent to the lens array closest to the image side, the length in the first axial direction may be longer than the length in the second axial direction.

[0019] In the plurality of lenses included in the lens array that is positioned closest to the object side in the plurality of lens arrays, the object side surface may be convex.

[0020] The plurality of lenses included in the lens array positioned closest to the object side may have positive refractive power.

[0021] In another general embodiment, a camera module includes: a plurality of lens modules, each including a plurality of lenses and arranged adjacent to each other; a housing housing the plurality of lens modules; and an image sensor module coupled to the housing and having a single image sensor, wherein the image sensor has a longer side extending in a first axial direction perpendicular to the optical axis and a shorter side extending in a second axial direction perpendicular to both the optical axis and the first axial direction, and among the plurality of lenses included in each lens module, the lens closest to the image side is arranged to have a longer length in the first axial direction than in the second axial direction.

[0022] When viewed along the optical axis, the lens positioned closest to the image side may include at least one of side surfaces with a linear shape that face each other in the first axial direction and in the second axial direction.

[0023] The lens positioned closest to the image side may include an optical portion and a flange portion extending from the optical portion. When viewed in the direction of the optical axis, the optical portion may include: a first edge having an arcuate shape; a second edge positioned on the side opposite to the first edge based on the optical axis and having an arcuate shape; and a third edge and a fourth edge connecting the first edge and the second edge.

[0024] When viewed along the optical axis, at least one of the third and fourth edges may have a linear shape.

[0025] Among the plurality of lenses included in each lens module, the lens that is positioned to face the lens closest to the image side may have a length in the first axial direction that is longer than its length in the second axial direction.

[0026] The camera module may further include a single infrared cutoff filter disposed between the plurality of lens modules and the image sensor, and the light blocking portion may divide the infrared cutoff filter into multiple zones to correspond to the number of the plurality of lens barrels.

[0027] In another general example, a camera module includes: an array of multiple lens modules, wherein each lens module includes lenses arranged sequentially from the object side toward the image side, wherein the image-side lens of each lens module has a length in a first axial direction perpendicular to the optical axis that is longer than the length in a second axial direction perpendicular to both the optical axis and the first axial direction.

[0028] The array of multiple lens modules may include multiple lens arrays arranged sequentially from the object side to the image side, with lenses disposed in the multiple lens arrays, and the image-side lens disposed in the image-side lens array of the multiple lens arrays.

[0029] The plurality of lens arrays may include a first lens array and a second lens array. A protrusion may be provided in the first lens array or the second lens array, and a recess may be provided in the other of the first lens array or the second lens array. The protrusion and the recess may contact each other for coupling.

[0030] Each lens module in the array of multiple lens modules may include a lens barrel, and the lens of each lens module may be disposed in the corresponding lens barrel.

[0031] The camera module may further include: a housing housing an array of said plurality of lens modules; and an image sensor module coupled to the housing and having a single image sensor, wherein the image sensor may have a longer side extending in a first axial direction and a shorter side extending in a second axial direction.

[0032] One or more of the lenses disposed on the object side of the most image-side lens of each lens module may have a length in the first axial direction that is longer than the length in the second axial direction.

[0033] Other features and characteristics will become apparent from reading the following detailed description, drawings and claims. Simple Explanation of the Diagram

[0034] Figure 1 is a perspective view of a camera module according to an exemplary embodiment of the present disclosure. Figure 2 is a schematic cross-sectional view of a plurality of lens arrays according to an exemplary embodiment of the present disclosure. Figure 3 is a perspective view showing a portion of a plurality of lens arrays of a lens assembly according to an exemplary embodiment of the present disclosure. Figure 4 is a cross-sectional view of Figure 3. Figure 5 is a perspective view of the spacers disposed between multiple lens arrays. Figure 6 is an exploded perspective view of Figure 3. Figures 7A and 7B are plan views of some lens arrays. Figure 8 is a schematic perspective view of the lens array and image sensor of a camera module according to another exemplary embodiment of the present disclosure. Figure 9 is a schematic cross-sectional view of a lens array according to another exemplary embodiment of the present disclosure. Figures 10A, 10B, 10C and 10D illustrate various exemplary embodiments of the non-circular lens applied to the exemplary embodiments shown in Figures 8 and 9. Figure 11 is a block diagram of a lens module according to an exemplary embodiment. Figure 12 is a view showing the aberration characteristics of the lens module shown in Figure 11. Figure 13 is a block diagram of a lens module according to another exemplary embodiment. Figure 14 is a view showing the aberration characteristics of the lens module shown in Figure 13. Figure 15 is a plan view of a camera module other than the lens assembly according to an exemplary embodiment of the present disclosure. Figure 16 is a perspective view of an infrared cutoff filter disposed in a camera module according to an exemplary embodiment of the present disclosure. Throughout all drawings and detailed descriptions, the same reference numbers refer to the same components. Drawings may not be drawn to scale, and for clarity, illustrative purposes, the relative size, proportion, and depiction of components in the drawings may be exaggerated. Implementation

[0035] In the following, although exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings, it should be noted that the examples are not limited thereto.

[0036] The following detailed description is provided to assist the reader in gaining a comprehensive understanding of the methods, apparatus, and / or systems described herein. However, various modifications, refinements, and equivalents of the methods, apparatus, and / or systems described herein will become apparent upon understanding this disclosure. For example, the order of operations described herein is merely illustrative and is not limited to the order stated herein, except for operations that must occur in a specific order, and can be changed as will become apparent upon understanding this disclosure. Furthermore, for clarity and brevity, descriptions of features known in this art may be omitted.

[0037] The features described herein may be implemented in different forms and should not be construed as limited to the examples described herein. Rather, the examples described herein are provided merely as illustrative of a number of possible ways of implementing the methods, apparatus and / or systems described herein, which will become apparent upon understanding this disclosure.

[0038] Throughout the specification, when an element such as a layer, region, or substrate is described as being "located" "on," "connected to," or "coupled to" another element, the element may be directly "located" "on," directly "connected to," or directly "coupled to" the other element, or there may be one or more other elements in between. Conversely, when an element is described as being "directly located" "on," "directly connected to," or "directly coupled to" another element, there may be no other elements in between.

[0039] The term "and / or" as used herein includes any one of the related listed items and any combination of any two or more items; similarly, "at least one of" includes any one of the related listed items and any combination of any two or more items.

[0040] Although terms such as "first," "second," and "third" may be used in this document to describe various components, parts, areas, layers, or sections, these components, parts, areas, layers, or sections are not limited by these terms. Specifically, these terms are used only to distinguish individual components, parts, areas, layers, or sections. Therefore, without departing from the teaching of the examples, the first component, part, area, layer, or section mentioned in the examples described herein may also be referred to as the second component, part, area, layer, or section.

[0041] For ease of explanation, spatially relative terms such as "above," "upper," "below," and "lower" may be used in this document to describe the relationship between one element and another as shown in the figure. These spatially relative terms are intended to encompass different orientations of the device during use or operation, in addition to those depicted in the figure. For example, if the device in the figure is flipped, an element described as being "above" or "upper" relative to another element will now be described as being "below" or "lower" relative to that other element. Therefore, the term "above" encompasses both upper and lower orientations depending on the spatial orientation of the device. The device may also be oriented in other ways (rotated 90 degrees or in other orientations), and the spatially relative terms used herein will be interpreted accordingly.

[0042] The terminology used herein is for illustrative purposes only and is not intended to limit this disclosure. Unless the context clearly indicates otherwise, the articles "a" and "the" are intended to include the plural form as well. The terms "comprises," "includes," and "has" indicate the presence of the stated features, numbers, operations, components, elements, and / or combinations thereof, but do not preclude the presence or addition of one or more other features, numbers, operations, components, elements, and / or combinations thereof.

[0043] Due to manufacturing techniques and / or tolerances, the shapes shown in the drawings may vary. Therefore, the examples described herein are not limited to the specific shapes shown in the drawings, but include shape changes that occur during manufacturing.

[0044] In this document, it should be noted that the use of the term "may" in relation to instances (e.g., what an instance may include or implement) means that there exists at least one instance that includes or implements such a feature, but not all instances are limited to this.

[0045] As will be apparent upon understanding this disclosure, the features of the instances described herein can be combined in various ways. Furthermore, although the instances described herein have various configurations, other configurations may exist, as will be apparent upon understanding this disclosure.

[0046] The present disclosure provides a thin lens assembly for capturing high-resolution images and videos, and a camera module including the same.

[0047] Figure 1 is a perspective view of a camera module according to an exemplary embodiment of the present disclosure, and Figure 2 is a schematic cross-sectional view of a plurality of lens arrays according to an exemplary embodiment of the present disclosure.

[0048] The camera module according to the exemplary embodiments of this disclosure can be applied to portable electronic devices such as mobile communication terminals, smartphones, and tablet PCs.

[0049] Referring to Figures 1 and 2, a camera module according to an exemplary embodiment of the present disclosure includes a lens assembly 100, a housing 200, and an image sensor module 400.

[0050] The lens assembly 100 includes multiple lens arrays 110 and lens holders 130.

[0051] The plurality of lens arrays 110 can be stacked and arranged along the optical axis.

[0052] Each of lens arrays 111, 112, 113, 114, and 115 includes a plurality of lenses.

[0053] For example, in each of lens arrays 111, 112, 113, 114, and 115, multiple lenses can be arranged in an N×N matrix structure or an N×M matrix structure. N and M are different natural numbers greater than or equal to 2.

[0054] The plurality of lens arrays 110 include a plurality of optical axes. For example, when a plurality of lenses are arranged in a 2×2 matrix structure in each of lens arrays 111, 112, 113, 114, and 115, the plurality of lens arrays 110 include four optical axes. The plurality of optical axes may be arranged parallel to each other.

[0055] Multiple lenses sharing a single optical axis can constitute a lens module. That is, when multiple lenses are arranged in a 2×2 matrix structure in each of lens arrays 111, 112, 113, 114, and 115, the multiple lens arrays 110 include four lens modules.

[0056] The total focal length deviation of each lens module can be within ±0.03 mm, the angle of view deviation can be within ±3°, and the distortion deviation can be ±3°.

[0057] In addition, in each lens module, the ratio of the distance (TTL) from the object-side surface of the lens closest to the object side to the image sensor along the optical axis to the diagonal length (2×IMG HT) of the imaging surface (effective imaging area) (TTL / (2×IMG HT)) can be 0.4 or less than 0.4.

[0058] In the following description, for ease of explanation, an exemplary embodiment in which multiple lenses are arranged in a 2×2 matrix structure in each lens array will be described. Furthermore, the multiple lens arrays may include four or five lens arrays arranged sequentially from the object side.

[0059] The lens assembly 100 can be housed in the housing 200. The camera module may have focus adjustment and / or optical image stabilization (OIS) functions.

[0060] For example, the lens assembly 100 can be moved relative to the housing 200 in the optical axis direction to adjust the focus. Additionally, the lens assembly 100 can be moved relative to the housing 200 in a direction perpendicular to the optical axis to correct for shake. Here, the optical axis direction can refer to the vertical direction in Figure 1.

[0061] Therefore, the camera module according to the exemplary embodiments of this disclosure may further include an actuator for moving the lens assembly 100.

[0062] In addition, a separate adjustment lens can be provided for focus adjustment, rather than moving the lens assembly 100 in the optical axis direction for focus adjustment.

[0063] For example, each lens module can implement focus adjustment by including an adjustment lens, which is positioned in front of the lens closest to the object.

[0064] Image sensor module 400 can be coupled to housing 200. Image sensor module 400 includes image sensor 410 and printed circuit board to which image sensor 410 is connected. Here, image sensor 410 is provided as a single image sensor 410.

[0065] That is, the lens assembly 100 includes multiple lens modules, and the image sensor module 400 does not include multiple image sensors corresponding to each lens module, but includes a single image sensor 410.

[0066] The multiple lens modules can capture images of the subject by dividing the effective imaging area of ​​a single image sensor 410.

[0067] A camera module according to an exemplary embodiment of this disclosure can generate a complete image by combining images captured by multiple lens modules.

[0068] That is, each lens module can capture an image of the same subject, and the captured images can be synthesized to produce a single complete image with higher resolution than the individual images.

[0069] Recently, in order to capture high-resolution images or videos, the number of pixels in image sensors has increased, and the size of image sensors has also increased. However, due to the increased size of lens modules and image sensors, there is a problem of camera modules protruding from portable electronic devices.

[0070] However, in the lens assembly 100 according to the exemplary embodiment of this disclosure, the relatively small plurality of lens modules divide the effective imaging area of ​​a single image sensor 410 having a large size to capture an image of the subject and synthesize the captured images, so that the lens assembly 100 can be miniaturized while producing high-resolution images.

[0071] Figure 3 is a perspective view showing a portion of a plurality of lens arrays of a lens assembly according to an exemplary embodiment of the present disclosure, Figure 4 is a cross-sectional view of Figure 3, Figure 5 is a perspective view of a spacer disposed between the plurality of lens arrays, and Figure 6 is an exploded perspective view of Figure 3.

[0072] The structure in which multiple lens arrays are stacked and arranged along the optical axis will be described with reference to Figures 3 to 6. Although two lens arrays are shown in Figures 3 to 6 for convenience, each lens array can be coupled to the adjacent lens array in the manner shown in Figures 3 to 6.

[0073] The first lens array 111 and the second lens array 112 can be stacked to be arranged in the direction of the optical axis (Z axis).

[0074] Since each lens array contains multiple lenses, the first lens array 111 and the second lens array 112 need to be coupled so that the optical axes (Z axes) of the lenses facing each other in the optical axis (Z axis) direction are aligned.

[0075] Therefore, the lens assembly 100 according to the exemplary embodiment of this disclosure has a self-aligning structure, such that the optical axes (Z-axis) of the plurality of lens arrays are aligned.

[0076] For example, one of the first lens array 111 and the second lens array 112 has a protrusion 111a and the other has a recess 112a.

[0077] In an exemplary embodiment, the protrusion 111a may be disposed on a surface of the first lens array 111 (e.g., the surface facing the second lens array 112), and the recess 112a may be disposed on a surface of the second lens array 112 (e.g., the surface facing the first lens array 111). The protrusion 111a and the recess 112a may contact each other for coupling.

[0078] The first lens array 111 and the second lens array 112 can be coupled to each other by coupling the protrusion 111a and the recess 112a.

[0079] In addition, the protrusion 111a and the recess 112a can guide the coupling position of the first lens array 111 and the second lens array 112, so that the optical axes (Z-axis) of the plurality of lenses of the first lens array 111 and the optical axes (Z-axis) of the plurality of lenses of the second lens array 112 can be aligned with each other.

[0080] In the direction from the first lens array 111 to the second lens array 112 (or in the direction from the protrusion 111a to the recess 112a), the diameters of the protrusion 111a and the recess 112a may each gradually decrease.

[0081] For example, the surfaces of the protrusion 111a and the recess 112a facing each other in a direction perpendicular to the optical axis (Z-axis) can be inclined and curved surfaces. That is, the side surface of the protrusion 111a and the inner wall of the recess 112a facing the protrusion 111a can be inclined and curved.

[0082] In an exemplary embodiment, the protrusion 111a may have a truncated cone shape, and the recess 112a may have a shape corresponding to the protrusion 111a.

[0083] The height of the protrusion 111a may be greater than the depth of the recess 112a. Therefore, the protrusion 111a and the recess 112a come into contact with each other to be guided in a position along the inclined curved surface, and the remaining area of ​​a surface of the first lens array 111 in which the protrusion 111a is not formed may be configured to be spaced apart in the optical axis (Z-axis) direction from the remaining portion of the second lens array 112 in which the recess 112a is not formed.

[0084] The protrusion 111a and the recess 112a can be positioned in the area surrounded by the plurality of lenses of each lens array. For example, the protrusion 111a and the recess 112a can be located at the center of each lens array.

[0085] With this coupling structure, the first lens array 111 and the second lens array 112 can be coupled so that the optical axes (Z-axis) of the lenses facing each other in the optical axis (Z-axis) direction are aligned.

[0086] A spacer S may be provided between the first lens array 111 and the second lens array 112.

[0087] The spacer S maintains the distance between the first lens array 111 and the second lens array 112 and blocks unwanted light. For example, a light-blocking layer can be provided in the spacer S to block unwanted light. The light-blocking layer can be a black film or black iron oxide.

[0088] The spacer S can be formed of a metallic material. For example, the spacer S can be formed of a non-ferrous metal. For example, the spacer S can be formed of phosphor bronze.

[0089] The spacer S has multiple openings S1 such that the multiple lenses of each lens array can face each other in the optical axis (Z-axis) direction. In addition, the spacer S has a through hole S2 such that the protrusion 111a and the recess 112a are coupled to each other.

[0090] Figures 7A and 7B are plan views of some lens arrays.

[0091] Referring to Figures 7A and 7B, a plurality of lenses disposed in at least one of the plurality of lens arrays 110 may be configured to have a non-circular planar shape.

[0092] Since the multiple lens modules included in the multiple lens arrays 110 capture images of the same subject, it is necessary to arrange the optical axes (Z-axis) of the corresponding lens modules as close as possible.

[0093] Therefore, the lens assembly 100 according to the exemplary embodiments of this disclosure can be configured such that the plurality of lenses disposed in at least one of the plurality of lens arrays 110 have a non-circular planar shape. In this document, planar shape refers to a shape in a planar view.

[0094] In an exemplary embodiment, the plurality of lenses included in the first lens array 111 (hereinafter referred to as the "foremost lens array") disposed closest to the object side may have a circular planar shape, and the plurality of lenses included in the lens array 115 (hereinafter referred to as the "last lens array") disposed closest to the image side may have a non-circular planar shape.

[0095] In an exemplary embodiment, the plurality of lenses included in the final lens array and the plurality of lenses included in the lens array disposed adjacent to the final lens array 115 (e.g., the fourth lens array 114 disposed from the object side) may have a non-circular planar shape.

[0096] In an exemplary embodiment, the plurality of lenses included in the foremost lens array may have a circular planar shape, and the plurality of lenses included in the remaining lens arrays may have a non-circular planar shape.

[0097] In an exemplary embodiment, the plurality of lenses included in all lens arrays may have a non-circular planar shape.

[0098] In all exemplary embodiments, each of the plurality of lenses included in the final lens array has a non-circular planar shape.

[0099] By configuring them in this way, the lenses included in the plurality of lens arrays can be arranged close to each other.

[0100] The shapes of the multiple lenses included in the final lens array will be described below.

[0101] In a plane perpendicular to the optical axis (Z-axis), the length of a non-circular lens along the first axis (X-axis) perpendicular to the optical axis (Z-axis) is greater than its length along the second axis (Y-axis) perpendicular to both the optical axis (Z-axis) and the first axis (X-axis). In a non-circular lens, the ratio of the length along the second axis (Y-axis) to the length along the first axis (X-axis) can be greater than 0.5 and less than 1.

[0102] For example, when viewed along the optical axis (Z-axis), a non-circular lens has a shape in which a portion of the circle is cut off.

[0103] Here, the first axis (X-axis) direction is the direction in which the longer side of the image sensor 410 extends, and the second axis (Y-axis) direction is the direction in which the shorter side of the image sensor 410 extends.

[0104] Referring to Figures 7A and 7B, in an exemplary embodiment, the non-circular lens has a major axis and a minor axis. The major axis is a line segment that connects the two sides of the non-circular lens along a first axis (X-axis) while passing through the optical axis (Z-axis), and the minor axis is a line segment that connects the two sides of the non-circular lens along a second axis (Y-axis) while passing through the optical axis (Z-axis). The major and minor axes are perpendicular to each other, and the length of the major axis is longer than the length of the minor axis.

[0105] In the embodiment shown in Figure 7A, the non-circular lens has four side surfaces along its periphery. When viewed along the optical axis, two of the four side surfaces have a generally linear shape, and the other two side surfaces have an arcuate shape.

[0106] The two side surfaces having a linear shape may be side surfaces extending in the direction of a first axis (X-axis).

[0107] In the exemplary embodiment shown in Figure 7B, when viewed in the direction of the optical axis (Z-axis), the side surface of the non-circular lens facing the other lens in the direction of the second axis (Y-axis) has a linear shape, and the remaining side surfaces have an arcuate shape.

[0108] For example, when viewed in the optical axis (Z-axis) direction, the side surfaces of the plurality of lenses included in the final lens array that face each other in the second axis (Y-axis) direction have a linear shape, and when viewed in the optical axis (Z-axis) direction, the remaining side surfaces have an arcuate shape.

[0109] Generally, since the image sensor 410 is rectangular, not all the light refracted by the circular lens is formed on the image sensor 410. Therefore, without affecting image formation, the size of the lens can be reduced by making the lens non-circular.

[0110] In addition, when the multiple lenses included in the lens array are each circular in shape, there is a problem of increased distance between the lenses.

[0111] However, in this exemplary embodiment, since the plurality of lenses included in the at least one lens array each have a non-circular shape, the plurality of optical axes can be arranged close to each other without affecting image formation.

[0112] Furthermore, because non-circular lenses have a major axis and a minor axis, they also have a maximum diameter and a minimum diameter. Here, the maximum diameter of a non-circular lens is greater than the diameter of a circular lens.

[0113] That is, a lens with a relatively large diameter can have a non-circular planar shape.

[0114] Figure 8 is a schematic perspective view of the lens array and image sensor of a camera module according to another exemplary embodiment of the present disclosure, and Figure 9 is a schematic cross-sectional view of the lens array according to another exemplary embodiment of the present disclosure.

[0115] Apart from the configuration of multiple lens arrays, the exemplary embodiments shown in Figures 8 and 9 are the same as the exemplary embodiments shown in Figure 2.

[0116] For example, in the exemplary embodiment shown in FIG2, the lens assembly 100 includes a plurality of lens arrays 110, and each of lens arrays 111, 112, 113, 114 and 115 includes a plurality of lenses, and the plurality of lens arrays 110 includes a plurality of optical axes.

[0117] However, in the exemplary embodiments shown in Figures 8 and 9, the lens assembly 100 includes multiple lens modules 1, 2, 3, and 4, each having an optical axis. The optical axes of the respective lens modules 1, 2, 3, and 4 may be arranged in parallel.

[0118] Lens modules 1, 2, 3, and 4 can be housed in lens barrels, and the lens barrels can be disposed in a lens holder 130. Therefore, for each lens module 1, 2, 3, and 4, the optical axes of the lenses can be aligned, and thus the plurality of optical axes of the lens assembly 100 can be easily aligned.

[0119] Figures 10A to 10D illustrate various exemplary embodiments of the non-circular lens applied to the exemplary embodiments shown in Figures 8 and 9.

[0120] Among the plurality of lenses included in each lens module 1, 2, 3 and 4, the lens closest to the image side can be configured to have a non-circular planar shape.

[0121] For example, the lens positioned closest to the image side has a longer length in the first axis (X-axis) direction than in the second axis (Y-axis) direction.

[0122] Each of the non-circular lenses may include an optical portion 10 and a flange portion 30.

[0123] The optical section 10 may be part of the optical performance of a non-circular lens. For example, light refracted from the body can pass through the optical section 10 and be refracted.

[0124] The optical part 10 may have refractive power and may have a surface with an aspherical surface.

[0125] The flange portion 30 can be configured to secure a non-circular lens to another component, such as a lens barrel or another lens.

[0126] The flange portion 30 extends from the optical portion 10 and can be integrally formed with the optical portion 10.

[0127] The optical part 10 is formed in a non-circular shape. For example, when viewed from the optical axis (Z-axis), the optical part 10 is non-circular.

[0128] Referring to FIG10A, in a plane perpendicular to the optical axis (Z-axis), the optical part 10 has a longer length in the direction of the first axis (X-axis) perpendicular to the optical axis (Z-axis) than in the direction of the second axis (Y-axis) perpendicular to both the optical axis (Z-axis) and the first axis (X-axis).

[0129] The optical part 10 includes a first edge 11, a second edge 12, a third edge 13 and a fourth edge 14.

[0130] When viewed along the optical axis (Z-axis), each of the first edge 11 and the second edge 12 has an arc shape.

[0131] The second edge 12 is disposed on the opposite side of the first edge 11. In addition, the first edge 11 and the second edge 12 are positioned facing each other based on the optical axis (Z-axis).

[0132] The fourth edge 14 is disposed on the opposite side of the third edge 13. In addition, the third edge 13 and the fourth edge 14 are positioned facing each other based on the optical axis (Z-axis).

[0133] The third edge 13 and the fourth edge 14 are respectively connected to the first edge 11 and the second edge 12. The third edge 13 and the fourth edge 14 are symmetrical with respect to the optical axis (Z-axis) and can be formed parallel to each other.

[0134] When viewed along the optical axis (Z-axis), the first edge 11 and the second edge 12 have arcuate shapes, and the third edge 13 and the fourth edge 14 have approximately linear shapes.

[0135] The optical component 10 has a major axis and a minor axis. The line segment that connects the third edge 13 and the fourth edge 14 with the shortest distance while passing through the optical axis (Z-axis) is the minor axis, and the line segment that connects the first edge 11 and the second edge 12 while passing through the optical axis (Z-axis) and is perpendicular to the minor axis is the major axis. The length of the major axis is longer than the length of the minor axis.

[0136] The flange portion 30 extends along the periphery of a portion of the optical portion 10 in the direction of the first axis (X-axis). At least a portion of the flange portion 30 is in contact with the inner surface of the lens barrel.

[0137] The flange portion 30 includes a first flange portion 31 and a second flange portion 32. The first flange portion 31 extends from the first edge 11 of the optical portion 10, and the second flange portion 32 extends from the second edge 12 of the optical portion 10.

[0138] The first edge 11 of the optical portion 10 may refer to a portion adjacent to the first flange portion 31, and the second edge 12 of the optical portion 10 may refer to a portion adjacent to the second flange portion 32.

[0139] The third edge 13 of the optical portion 10 may refer to one side of the upper surface of the optical portion 10 where the flange portion 30 is not formed, and the fourth edge 14 of the optical portion 10 may refer to the other side of the upper surface of the optical portion 10 where the flange portion 30 is not formed.

[0140] The side surface of the first flange portion 31 includes a first flat portion 31a and a first curved portion 31b. The first flat portion 31a may refer to the side surface that intersects with a line extending along the long axis of the optical portion 10. The first flat portion 31a may be flat.

[0141] The first curved portion 31b is disposed on both sides of the first flat portion 31a. The first curved portion 31b may be a surface that contacts the inner surface of the lens barrel and may be a curved surface.

[0142] The second flange portion 32 includes a second flat portion 32a and a second curved portion 32b. The second flat portion 32a may refer to the side surface that intersects with a line extending along the long axis of the optical portion 10. The second flat portion 32a may be flat.

[0143] The second curved portion 32b is disposed on both sides of the second flat portion 32a. The second curved portion 32b may be a surface that contacts the inner surface of the lens barrel, and may be a curved surface.

[0144] Referring to Figures 10B to 10D, on a non-circular lens, when viewed in the direction of the optical axis (Z-axis), at least a portion of the surface facing another lens disposed adjacent to the non-circular lens has a linear shape, and the remaining portion has an arcuate shape.

[0145] For example, among the plurality of lenses, when viewed in the optical axis (Z-axis) direction, at least one of the surfaces facing each other in the first axis (X-axis) direction and the surfaces facing each other in the second axis (Y-axis) direction has a linear shape, and when viewed in the optical axis direction, the other surface may have an arcuate shape.

[0146] Figure 11 is a configuration diagram of a lens module according to an exemplary embodiment, Figure 12 is a diagram showing the aberration characteristics of the lens module shown in Figure 11, Figure 13 is a configuration diagram of a lens module according to another exemplary embodiment, and Figure 14 is a view showing the aberration characteristics of the lens module shown in Figure 13.

[0147] The lens module illustrated with reference to Figures 11 to 14 may be any of the plurality of lens modules according to the above exemplary embodiments. Furthermore, the owners of the plurality of lens modules may have the same specifications.

[0148] In this disclosure, the first surface (or object-side surface) of each lens refers to the surface closer to the object side, and the second surface (or image-side surface) refers to the surface closer to the image side. Furthermore, all values ​​for the lens's radius of curvature, thickness, distance, focal length, etc., are in millimeters (mm), and the field of view (FOV) is in degrees (°).

[0149] Furthermore, in the description of the shape of each lens, a convex shape of a surface refers to the paraxial region of the corresponding surface being convex, and a concave shape of a surface refers to the paraxial region of the corresponding surface being concave. Therefore, even if one surface of a lens is described as having a convex shape, the edge portion of the lens may be concave. Similarly, even if one surface of a lens is described as having a concave shape, the edge portion of the lens may be convex.

[0150] Meanwhile, the paraxial region refers to a very narrow area close to the optical axis.

[0151] The imaging surface can refer to the virtual surface on which the lens module forms the focal point. Alternatively, the imaging surface can refer to a surface on the image sensor that receives light.

[0152] The lens module according to the exemplary embodiments of this disclosure includes four lenses or five lenses.

[0153] For example, referring to FIG11, a lens module according to an exemplary embodiment of the present disclosure includes a first lens L1, a second lens L2, a third lens L3, and a fourth lens L4 arranged sequentially from the object side. The first lens L1 to the fourth lens L4 are spaced apart from each other by a predetermined distance along the optical axis (Z-axis).

[0154] Furthermore, referring to FIG13, the lens module according to the exemplary embodiment of this disclosure includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, and a fifth lens L5 arranged sequentially from the object side. The first lens L1 to the fifth lens L5 are spaced apart from each other by a predetermined distance along the optical axis (Z-axis).

[0155] The lens module according to the exemplary embodiments of this disclosure includes not only four or five lenses, but may also include other components as needed.

[0156] For example, the lens module may further include an infrared filter (F, referred to as "filter" below) for blocking infrared light. The filter F is positioned between the final lens and the imaging surface IM.

[0157] In addition, the lens module may further include a stop for adjusting the amount of light.

[0158] Meanwhile, at least one of the plurality of lenses constituting the lens module has an inflection point on at least one of the object-side surface and the image-side surface.

[0159] An inflection point refers to the point where the surface of a lens changes from concave to convex or from convex to concave.

[0160] The multiple lenses constituting the lens module are formed of plastic material.

[0161] In addition, each of the first lens L1 to the third lens L3 may be formed of a plastic material with different optical properties from the lenses arranged adjacent to each other.

[0162] In an exemplary embodiment, the difference in Abbe number between the first lens L1 and the second lens L2 may exceed 30. Additionally, the difference in Abbe number between the second lens L2 and the third lens L3 may exceed 30.

[0163] In an exemplary embodiment, the second lens L2 may be formed of a plastic material having a high refractive index and a low dispersion value. For example, the refractive index of the second lens L2 may be greater than 1.65, and the Abbe number of the second lens L2 may be less than 25.

[0164] In an exemplary embodiment, the lens module satisfies the condition 30 < |v1-v2| < 50. v1 is the Abbe number of the first lens L1, and v2 is the Abbe number of the second lens L2.

[0165] In an exemplary embodiment, the lens module satisfies the condition 30 < |v2-v3| < 50. v2 is the Abbe number of the second lens L2, and v3 is the Abbe number of the third lens L3.

[0166] The multiple lenses constituting the lens module may have aspherical surfaces. For example, each of the multiple lenses may have at least one aspherical surface.

[0167] Here, the aspherical surface of each lens is expressed by Equation 1.

[0168] Equation 1

[0169] In Equation 1, c is the curvature of the lens (the reciprocal of the radius of curvature), K is the conic constant, and Y is the distance from any point on the aspherical surface of the lens to the optical axis. Additionally, constants A through H and J refer to the aspheric coefficient. Z (Sagging (SAG)) represents the distance along the optical axis between any point on the aspherical surface of the lens and the vertex of the aspherical surface.

[0170] The lens module according to an exemplary embodiment of the present disclosure will be described with reference to Figures 11 and 12.

[0171] The lens module according to the exemplary embodiments of this disclosure may include a first lens L1, a second lens L2, a third lens L3 and a fourth lens L4, and may further include a filter F and an aperture stop.

[0172] The lens module according to an exemplary embodiment of this disclosure can form a focal point on an imaging surface IM. The imaging surface IM can refer to the surface on which the lens module forms the focal point. For example, the imaging surface IM can refer to a surface of the image sensor 410 that receives light.

[0173] Table 1 shows the lens characteristics (radius of curvature, thickness or distance between lenses, refractive index, Abbe number, focal length, and effective radius).

[0174] Table 1 Surface number Remark radius of curvature Thickness or distance Refractive index Abbe number focal length Effective radius S1 First lens 1.6537 0.4683 1.546 56.114 3.3152 0.87 S2 17.2222 0.1101 0.769377 S3 aperture infinity 0.1123 0.693 S4 Second lens -39.7256 0.5926 1.669 20.353 -6.2233 0.685 S5 4.6786 0.5421 0.71 S6 Third lens -5.3216 0.8000 1.546 56.114 3.3095 1.2 S7 -1.4206 0.4613 1.375578 S8 Fourth lens 1.9282 0.4319 1.546 56.114 -3.5565 2.282654 S9 0.8910 0.4720 2.58

[0175] In the exemplary embodiments disclosed herein, the first lens L1 has a positive refractive power, the first surface of the first lens L1 is convex, and the second surface of the first lens L1 is concave.

[0176] The second lens L2 has a negative refractive power, and the first and second surfaces of the second lens L2 are concave.

[0177] The third lens L3 has positive refractive power. The first surface of the third lens L3 is concave, and the second surface of the third lens L3 is convex in the paraxial region.

[0178] Furthermore, the third lens L3 has at least one inflection point on its second surface. For example, the second surface of the third lens L3 may be convex in the paraxial region and concave in a portion outside the paraxial region.

[0179] The fourth lens L4 has negative refractive power. The first surface of the fourth lens L4 is convex in the paraxial region, and the second surface of the fourth lens L4 is concave in the paraxial region.

[0180] Furthermore, the fourth lens L4 has at least one inflection point on at least one of the first and second surfaces. For example, the first surface of the fourth lens L4 may be convex in the paraxial region and concave in a portion outside the paraxial region. Additionally, the second surface of the fourth lens L4 may be concave in the paraxial region and convex in a portion outside the paraxial region.

[0181] Furthermore, each surface of the first lens L1 to the fourth lens L4 has an aspherical coefficient as shown in Table 2. For example, both the object-side surface and the image-side surface of the first lens L1 to the fourth lens L4 are aspherical.

[0182] Table 2 S1 S2 S4 S5 S6 S7 S8 S9 Conic constant (K) 1.654 17.222 -39.726 4.679 -5.322 -1.421 1.928 0.891 A factor of 4 (A) 3.102E-01 -8.649E+01 -3.665E+01 -6.348E+01 1.855E+00 -2.331E-01 -2.810E+01 -4.970E+00 A factor of 6 (B) -2.538E-02 -1.427E-01 -4.776E-02 3.339E-01 -9.025E-02 -9.028E-02 -2.545E-01 -1.302E-01 8-fold factor (C) 4.272E-01 2.236E+00 7.416E-01 -3.981E+00 5.977E-01 3.663E-01 1.412E-01 7.027E-02 A factor of 10 (D) -3.270E+00 -1.773E+01 -6.693E+00 4.168E+01 -2.920E+00 -8.575E-01 -7.557E-02 -2.866E-02 12 times factor (E) 1.420E+01 8.289E+01 3.328E+01 -2.661E+02 7.999E+00 1.285E+00 5.086E-02 7.293E-03 A factor of 14 (F) -3.776E+01 -2.422E+02 -1.018E+02 1.057E+03 -1.352E+01 -1.260E+00 -2.462E-02 -8.400E-04 A factor of 16 (G) 6.242E+01 4.449E+02 1.915E+02 -2.627E+03 1.447E+01 8.165E-01 7.230E-03 -5.500E-05 18-fold factor (H) -6.255E+01 -4.979E+02 -2.145E+02 3.976E+03 -9.533E+00 -3.363E-01 -1.250E-03 2.820E-05 20-fold factor (J) 3.473E+01 3.085E+02 1.300E+02 -3.348E+03 3.525E+00 8.135E-02 1.170E-04 -3.000E-06

[0183] In addition, the optical system configured as described above can have the aberration characteristics shown in FIG12.

[0184] A lens module according to another exemplary embodiment of the present disclosure will be described with reference to Figures 13 and 14.

[0185] A lens module according to another exemplary embodiment of this disclosure may include a first lens L1, a second lens L2, a third lens L3, a fourth lens L4 and a fifth lens L5, and may further include a filter (F) and an aperture stop.

[0186] According to another exemplary embodiment of this disclosure, the lens module can form a focal point on the imaging surface IM. The imaging surface IM can refer to the surface on which the lens module forms the focal point. For example, the imaging surface IM can refer to a surface of the image sensor 410 that receives light.

[0187] Table 3 shows the lens characteristics of each lens (radius of curvature, thickness or distance between lenses, refractive index, Abbe number, focal length, effective radius).

[0188] Table 3 Surface number Remark radius of curvature Thickness or distance Refractive index Abbe number focal length Effective radius S1 First lens 1.4931 0.6161 1.546 55.9 2.7663 0.995 S2 111.5397 0.1 0.924416 S3 Second lens 3.05 0.1999 1.668 20.4 -5.4205 0.83 S4 1.6121 0.1924 0.73 S5 aperture infinity 0.1437 0.74846 S6 Third lens -43.7373 0.4807 1.546 55.9 22.2635 0.828749 S7 -9.5491 0.5452 1.01 S8 Fourth lens -129.9230 0.4224 1.668 20.4 -15.4001 1.42 S9 11.1864 0.1443 1.656817 S10 Fifth lens 1.3404 0.5745 1.537 55.7 24.3341 2.1 S11 1.2700 0.2168 2.363082

[0189] In another exemplary embodiment of this disclosure, the first lens L1 has a positive refractive power, the first surface of the first lens L1 is convex, and the second surface of the first lens L1 is concave.

[0190] The second lens L2 has a negative refractive power. The first surface of the second lens L2 is convex, and the second surface of the second lens L2 is concave.

[0191] The third lens L3 has positive refractive power. The first surface of the third lens L3 is concave, and the second surface of the third lens L3 is convex in the paraxial region.

[0192] Furthermore, the third lens L3 has at least one inflection point on its second surface. For example, the second surface of the third lens L3 may be convex in the paraxial region and concave in a portion outside the paraxial region.

[0193] The fourth lens L4 has a negative refractive power, and the first and second surfaces of the fourth lens L4 are concave in the paraxial region.

[0194] Furthermore, the fourth lens L4 has at least one inflection point on its second surface. For example, the second surface of the fourth lens L4 may be concave in the paraxial region and convex in a portion outside the paraxial region.

[0195] The fifth lens L5 has positive refractive power. The first surface of the fifth lens L5 is convex in the paraxial region, and the second surface of the fifth lens L5 is concave in the paraxial region.

[0196] Furthermore, the fifth lens L5 has at least one inflection point on both the first and second surfaces. For example, the first surface of the fifth lens L5 may be convex in the paraxial region and concave in a portion outside the paraxial region. The second surface of the fifth lens L5 may be concave in the paraxial region and convex in a portion outside the paraxial region.

[0197] Furthermore, each surface of the first lens L1 to the fifth lens L5 has an aspherical coefficient as shown in Table 4. For example, both the object-side surface and the image-side surface of the first lens L1 to the fifth lens L5 are aspherical.

[0198] Table 4 S1 S2 S3 S4 S6 Conic constant (K) 1.493 111.540 3.046 1.612 -43.737 A factor of 4 (A) -2.619E-01 0.000E+00 -1.540E+01 -1.118E+00 9.900E+01 A factor of 6 (B) 5.130E-02 -1.380E-02 -2.358E-01 3.960E-02 -3.365E-01 8-fold factor (C) -5.699E-01 -7.698E-01 1.190E+00 -4.561E+00 3.533E+00 A factor of 10 (D) 3.491E+00 6.938E+00 -4.256E+00 5.733E+01 -2.965E+01 12 times factor (E) -1.262E+01 -2.978E+01 1.337E+01 -3.821E+02 1.500E+02 A factor of 14 (F) 2.797E+01 7.530E+01 -2.972E+01 1.566E+03 -4.718E+02 A factor of 16 (G) -3.862E+01 -1.176E+02 4.189E+01 -4.023E+03 9.327E+02 18-fold factor (H) 3.234E+01 1.115E+02 -3.421E+01 6.314E+03 -1.126E+03 20-fold factor (J) -1.503E+01 -5.887E+01 1.380E+01 -5.528E+03 7.576E+02 S7 S8 S9 S10 S11 Conic constant (K) -9.549 -129.923 11.186 1.340 1.270 A factor of 4 (A) -9.209E+01 5.000E+01 3.407E+01 -1.873E+00 -1.006E+00 A factor of 6 (B) -5.820E-02 2.279E-01 -5.270E-02 -5.548E-01 -3.215E-01 8-fold factor (C) -1.399E-01 -9.612E-01 -3.096E-01 6.136E-01 1.553E-01 A factor of 10 (D) 4.757E-01 2.490E+00 1.196E+00 -5.421E-01 -2.740E-02 12 times factor (E) -8.828E-01 -4.470E+00 -2.051E+00 3.234E-01 -2.270E-02 A factor of 14 (F) 1.050E+00 5.124E+00 1.920E+00 -1.204E-01 1.820E-02 A factor of 16 (G) -4.991E-01 -3.720E+00 -1.060E+00 2.730E-02 -6.000E-03 18-fold factor (H) -2.307E-01 1.649E+00 3.459E-01 -3.600E-03 1.000E-03 20-fold factor (J) 3.861E-01 -4.048E-01 -6.160E-02 2.000E-04 -1.000E-04

[0199] In addition, the optical system configured as described above can have the aberration characteristics shown in FIG14.

[0200] Figure 15 is a plan view of a camera module other than the lens assembly according to an exemplary embodiment of the present disclosure, and Figure 16 is a perspective view of an infrared cutoff filter disposed in a camera module according to an exemplary embodiment of the present disclosure.

[0201] In a camera module according to an exemplary embodiment of the present disclosure, multiple lens modules divide the effective imaging area of ​​a single image sensor 410 to capture an image of a subject, and synthesize the captured images to produce a complete image.

[0202] Furthermore, since each lens module is positioned close to each other, light passing through one lens module may affect the imaging area adjacent to the lens module, and the image quality of the image captured by each lens module may be degraded by this unwanted light.

[0203] Therefore, the camera module according to the exemplary embodiment of this disclosure includes a light blocking portion 330 in the infrared cutoff filter 300 to prevent light passing through one lens module from affecting the imaging area of ​​an adjacent lens module.

[0204] As with the image sensor 410, the infrared cutoff filter 300 is provided as a single infrared cutoff filter 300.

[0205] That is, a single infrared cutoff filter 300 is provided, instead of multiple infrared cutoff filters corresponding to each lens module.

[0206] The light-blocking portion 330 may be a light-absorbing layer that blocks unwanted light from the light incident on the infrared cut-off filter 300. The light-absorbing layer may be black.

[0207] The light blocking portion 330 may be disposed on at least one of the upper surface 310 (the surface facing the lens assembly) and the lower surface (the surface facing the image sensor) of the infrared cut-off filter 300.

[0208] The infrared cutoff filter 300 can be divided into multiple zones by the light-blocking portion 330. For example, when multiple lenses are arranged in each lens array in an N×N matrix structure, the light-blocking portion 330 can be arranged to extend in directions orthogonal to each other with respect to the center of the infrared cutoff filter 300. Therefore, the infrared cutoff filter 300 can be divided into four zones.

[0209] Since the infrared cut-off filter 300 is located close to the image sensor 410, light passing through each lens module can be effectively prevented from incident on the imaging area of ​​the adjacent lens module by forming a light blocking portion 330 in the infrared cut-off filter 300.

[0210] In summary, according to the exemplary embodiments of this disclosure, the lens assembly and camera module including the lens assembly according to the exemplary embodiments of this disclosure can reduce size while capturing high-resolution images and videos.

[0211] Although specific exemplary embodiments have been shown and described above, it will be apparent upon understanding this disclosure that various changes in form and detail may be made to these examples without departing from the spirit and scope of the claims and their equivalents. The examples described herein are for illustrative purposes only and are not intended to be limiting. Descriptions of features or manner in each example are to be considered applicable to similar features or manner in other examples. Suitable results may be achieved if the technology is implemented in a different order, and / or if components in the system, architecture, apparatus, or circuit are combined in different ways and / or replaced or supplemented by other components or their equivalents. Therefore, the scope of this disclosure is not defined by the detailed description but by the claims and their equivalents, and all variations within the scope of the claims and their equivalents are to be construed as included in this disclosure.

[0212] 1, 2, 3, 4: Lens Module 10: Optical Section 11: First Edge 12: Second Edge 13: Third Edge 14: Fourth Edge 30: Flange portion 31: First flange portion 31a: First flat section 31b: First curved section 32: Second flange portion 32a: Second flat section 32b: Second curved section 100: Lens assembly 110, 113: Lens array 111: First lens array 111a: Protrusion 112: Second lens array / lens array 112a: Depression 114: Fourth lens array / lens array 115: Last lens array / lens array 130: Lens Holder 200: Housing 300: Infrared cutoff filter 310: Upper surface 330: Light blocking section 400: Image Sensor Module 410: Image Sensor L1: First lens L2: Second lens L3: Third lens L4: Fourth Lens L5: Fifth Lens F: Infrared filter / filter IM: Imaging Surface S: Spacer S1: Opening S2: Perforation X, Y, Z: Axes

Claims

1. A lens assembly, comprising: Multiple lens arrays are sequentially arranged from the object side toward the image side. Each lens array includes multiple lenses, including multiple lenses in the lens array closest to the image side, each lens having two side surfaces facing each other in a first axial direction perpendicular to the optical axis and two side surfaces facing each other in a second axial direction perpendicular to both the optical axis and the first axial direction. When viewed in the optical axis direction, the two side surfaces facing each other in the second axial direction of each of the multiple lenses have a linear shape. In the multiple lens arrays, each lens in the lens array closest to the image side has a length in the first axial direction that is longer than its length in the second axial direction. The multiple lens arrays include a first lens array and a second lens array. A protrusion is provided in either the first lens array or the second lens array, and a recess is provided in the other of the first lens array and the second lens array. The protrusion and the recess are in contact with each other for coupling.

2. The lens assembly as claimed in claim 1, wherein the surfaces of the protrusion and the recess facing each other in a direction perpendicular to the optical axis are inclined curved surfaces.

3. The lens assembly as claimed in claim 2, wherein the protrusion has a truncated conical shape.

4. The lens assembly as claimed in claim 2, wherein the diameters of the protrusion and the recess gradually decrease in the direction from the protrusion to the recess.

5. The lens assembly as described in claim 2, wherein, The height of the protrusion is greater than the depth of the recess.

6. The lens assembly as described in claim 1, wherein, The protrusion and the recess are each positioned within the area surrounded by the plurality of lenses.

7. The lens assembly as described in claim 1, further comprising: Housing that houses the plurality of lens arrays; An image sensor module is coupled to the housing and has a single image sensor; And a single infrared cutoff filter, disposed between the plurality of lens arrays and the single image sensor.

8. The lens assembly as claimed in claim 1, wherein the plurality of lens arrays includes a first lens array, a second lens array, a third lens array, and a fourth lens array, arranged sequentially from the object side toward the image side, and the first to the fourth lens arrays are spaced apart from each other in the paraxial region.

9. The lens assembly as claimed in claim 1, wherein the plurality of lens arrays includes a first lens array, a second lens array, a third lens array, a fourth lens array, and a fifth lens array, arranged sequentially from the object side toward the image side, and the first to the fifth lens arrays are spaced apart from each other in the paraxial region.

10. A lens assembly, comprising: Multiple lens arrays are arranged sequentially from the object side toward the image side; Housing that houses the plurality of lens arrays; An image sensor module, coupled to the housing and having a single image sensor; and a single infrared cutoff filter disposed between the plurality of lens arrays and the single image sensor, wherein each lens array includes a plurality of lenses, including a plurality of lenses disposed in the lens array closest to the image side, each lens having two side surfaces facing each other in a first axial direction perpendicular to the optical axis and two side surfaces facing each other in a second axial direction perpendicular to both the optical axis and the first axial direction, wherein when viewed in the optical axis direction, the two side surfaces facing each other in the second axial direction of the plurality of lenses have a linear shape, wherein in the plurality of lens arrays, the plurality of lenses disposed in the lens array closest to the image side have a length in the first axial direction that is longer than the length in the second axial direction, and wherein the single infrared cutoff filter includes a light-blocking portion disposed on at least one of the surfaces facing the plurality of lens arrays and the surface facing the single image sensor, and the light-blocking portion divides the single infrared cutoff filter into a plurality of regions.

11. A lens assembly, comprising: Multiple lens arrays are sequentially arranged from the object side towards the image side. Each lens array includes multiple lenses, including multiple lenses in the lens array closest to the image side, each lens having two side surfaces facing each other in a first axial direction perpendicular to the optical axis and two side surfaces facing each other in a second axial direction perpendicular to both the optical axis and the first axial direction. When viewed along the optical axis, the two side surfaces facing each other in the second axial direction of each of the multiple lenses have a linear shape. In the multiple lens arrays, including the lens array closest to the image side, each lens has a longer length in the first axial direction than in the second axial direction. The multiple lens arrays include a first lens array, a second lens array, a third lens array, and a fourth lens array, sequentially arranged from the object side towards the image side, with the first to fourth lens arrays spaced apart from each other in the paraxial region. The first lens array includes the multiple lenses, each with a positive refractive power, and the second lens array includes the multiple lenses, each with a negative refractive power. The third lens array includes the plurality of lenses, each having a positive refractive power, and the fourth lens array includes the plurality of lenses, each having a negative refractive power.

12. A lens assembly, comprising: Multiple lens arrays are sequentially arranged from the object side towards the image side. Each lens array includes multiple lenses, including multiple lenses in the lens array closest to the image side, each lens having two side surfaces facing each other in a first axial direction perpendicular to the optical axis and two side surfaces facing each other in a second axial direction perpendicular to both the optical axis and the first axial direction. When viewed along the optical axis, the two side surfaces facing each other in the second axial direction of each lens have a linear shape. In the multiple lens arrays, including the lens array closest to the image side, each lens has a longer length in the first axial direction than in the second axial direction. The multiple lens arrays include a first lens array, a second lens array, a third lens array, a fourth lens array, and a fifth lens array, sequentially arranged from the object side towards the image side, with the first to fifth lens arrays spaced apart from each other in the paraxial region. The first lens array includes the multiple lenses, each with a positive refractive power, and the second lens array includes the multiple lenses, each with a negative refractive power. The third lens array includes the plurality of lenses, each having a positive refractive power; the fourth lens array includes the plurality of lenses, each having a negative refractive power; and the fifth lens array includes the plurality of lenses, each having a positive refractive power.

Images