Lens assembly

Abstract

The lens assembly includes: a lens barrel; a lens disposed on the lens barrel; and a filter configured to filter light passing through the lens, in which the lens barrel includes: a seating portion in which the filter is disposed; and a step portion provided to face the filter between the seating portion and the optical axis, and wherein an avoidance groove formed to be recessed in the optical axis direction is provided on an upper surface of the seating portion.

Description

[0001] Cross - reference to related applications

[0002] This application claims the benefit of priority to Korean Patent Application No. 10 - 2023 - 0140424, filed with the Korean Intellectual Property Office on October 19, 2023, the entire disclosure of which is incorporated herein by reference for all purposes. Technical field

[0003] The present disclosure relates to a lens assembly applied to a camera module. Background art

[0004] A lens assembly may include a plurality of lenses, and a filter may be disposed behind the plurality of lenses. In this case, the filter may be assembled with the lens assembly in a manner of being attached to the rear of the lens barrel.

[0005] An adhesive may be used to attach the filter to the lens barrel. The adhesive is applied between the lens barrel and the filter. However, since the adhesive is generally applied in a liquid state, the adhesive may flow along the surface of the filter or the surface of the lens barrel.

[0006] When the adhesive flows, since the adhesive is applied to areas where the adhesive is not needed, the performance of the lens assembly may deteriorate. Therefore, a structure that can apply an appropriate amount of adhesive to the desired area is required.

[0007] The above information is presented as background information only to assist in understanding the present disclosure. No determination has been made, and no assertion is made, as to whether any of the above constitutes prior art with respect to the present disclosure. Summary of the utility model

[0008] The present Summary of the utility model section is intended to introduce, in a brief form, a selection of concepts that will be further described in the Detailed Description section below. The Summary of the utility model section is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to assist in determining the scope of the claimed subject matter.

[0009] In one general aspect, a lens assembly includes: a lens barrel; a lens disposed on the lens barrel; and a filter configured to filter light passing through the lens, wherein the lens barrel includes: a seating portion in which the filter is disposed; and a step portion disposed to face the filter between the seating portion and the optical axis, and wherein a relief groove recessed in the optical axis direction is formed on an upper surface of the seating portion.

[0010] The lens barrel may further include an inclined portion connecting the seating portion and the step portion.

[0011] The inclined portion can form an obtuse angle with the mounting portion.

[0012] The inclined portion can form an obtuse angle with the stepped portion.

[0013] The lens assembly may further include an adhesive applied between the mounting portion and the filter, and a part of the adhesive may be disposed in the avoidance groove.

[0014] The avoidance groove may include a first inclined surface and a second inclined surface extending from the first inclined surface.

[0015] A virtual line obtained by extending the first inclined surface may form an acute angle with the lower surface of the filter, and a virtual line obtained by extending the second inclined surface may form an acute angle with the lower surface of the filter.

[0016] The lens barrel may further include an adhesive inlet configured to introduce the adhesive between the filter and the mounting portion, and the adhesive inlet may be disposed outside the mounting portion with respect to the optical axis.

[0017] The adhesive inlet may be provided in plurality, and the plurality of adhesive inlets may be arranged rotationally symmetric with respect to the optical axis.

[0018] In another general aspect, a lens assembly includes: a lens barrel; a lens disposed on the lens barrel; and a filter configured to filter light passing through the lens, wherein the lens barrel includes: a plurality of mounting portions in which the filter is disposed; and a stepped portion disposed between the plurality of mounting portions and the optical axis, wherein the plurality of mounting portions are arranged spaced apart from each other in the circumferential direction of the lens barrel, and a separation space formed between the plurality of mounting portions communicates with the outside of the lens barrel.

[0019] The lens barrel may further include an air passage, and the air passage may communicate with the separation space.

[0020] The air passage may be provided in plurality, the separation space may be provided in plurality, and each of the plurality of air passages may be respectively connected to each of the separation spaces formed between the plurality of mounting portions.

[0021] The lens barrel may further include an inclined portion connecting the mounting portion and the stepped portion.

[0022] The inclined portion can form an obtuse angle with the mounting portion.

[0023] An avoidance groove formed to be recessed in the optical axis direction may be provided in each of the plurality of mounting portions.

[0024] The lens assembly may further include an adhesive applied between the plurality of mounting portions and the filter, and at least a part of the adhesive may be disposed in the avoidance groove.

[0025] The avoidance groove may include a first inclined surface and a second inclined surface extending from the first inclined surface.

[0026] The first inclined surface and the second inclined surface may form an obtuse angle.

[0027] Other features and aspects will be apparent from the drawings and the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a perspective view of a lens assembly according to an embodiment of the present disclosure.

[0029] Figure 2 is a cross-sectional view of a lens assembly according to an embodiment of the present disclosure.

[0030] Figure 3 is a view showing a part of the rear portion of a lens assembly according to a first embodiment of the present disclosure.

[0031] Figure 4 is a view showing Figure 3 a cross-section taken along line I-I' of

[0032] Figure 5 is Figure 4 an enlarged view of a part of

[0033] Figure 6 is Figure 5 an enlarged view of a part of

[0034] Figure 7 is a view of the rear portion of a lens assembly according to a second embodiment of the present disclosure.

[0035] Figure 8 is a view showing Figure 7 a cross-section taken along line II-II' of

[0036] Figure 9 is a view showing Figure 7 a cross-section taken along line III-III' of

[0037] Figure 10 is a view of the rear portion of a lens barrel according to a third embodiment of the present disclosure.

[0038] Figure 11 is a view showing Figure 10 a cross-section taken along line IV-IV' of

[0039] Figure 12 is a view showing Figure 10 a cross-section taken along line V-V' of

[0040] Throughout the drawings and the detailed description, unless otherwise described, the same reference numerals refer to the same elements. For clarity, illustration, and convenience, the drawings may not be drawn to scale, and the relative sizes, proportions, and depictions of elements in the drawings may be exaggerated. Detailed Description

[0041] In the following, although examples of the present disclosure will be described in detail with reference to the drawings, it should be noted that the examples are not limited thereto.

[0042] The following detailed description is provided to assist the reader in obtaining a comprehensive understanding of the methods, apparatuses, and / or systems described herein. However, various changes, modifications, and equivalents of the methods, apparatuses, and / or systems described herein will be apparent after understanding the present disclosure. For example, the order of operations described herein is merely illustrative and, except for operations that must occur in a particular order, is not limited to the order set forth herein but may be changed, which will be apparent after understanding the present disclosure. Additionally, descriptions of features known in the art may be omitted for greater clarity and conciseness.

[0043] 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 to illustrate some of the many possible ways of implementing the methods, apparatuses, and / or systems described herein that will be apparent after understanding the present disclosure.

[0044] Throughout the specification, when an element such as a layer, region, or substrate is described as being "on," "connected to," or "coupled to" another element, the element may be directly "on," directly "connected to," or directly "coupled to" the other element, or there may be one or more other elements intervening between the element and the other element. In contrast, when an element is described as being "directly on," "directly connected to," or "directly coupled to" another element, there are no other elements intervening between the element and the other element.

[0045] As used herein, the phrase "and / or" includes any one of the associated listed items and any combination of any two or more of them; likewise, "at least one" includes any one of the associated listed items and any combination of any two or more of them.

[0046] Although terms such as "first", "second", and "third" may be used herein to describe various components, parts, regions, layers, or sections, these components, parts, regions, layers, or sections are not limited by these terms. Rather, these terms are only used to distinguish one component, part, region, layer, or section from another. Thus, a first component, first part, first region, first layer, or first section mentioned in the examples herein may also be termed a second component, second part, second region, second layer, or second section without departing from the teachings of the examples described herein.

[0047] Spatial relative terms such as "above", "upper", "below", "lower", etc. may be used herein for convenience of description to describe the relationship of one element relative to another as shown in the figures. In addition to covering the orientations depicted in the figures, these spatial relative terms are intended to also cover different orientations of the device during use or operation. For example, if the device in the figures is flipped, an element described as "above" or "upper" relative to another element will be "below" or "lower" relative to that other element. Thus, depending on the spatial orientation of the device, the term "above" covers both the orientation of "above" and "below". The device may also be oriented in other ways (e.g., rotated 90 degrees or in other orientations), and the spatial relative terms used herein should be interpreted accordingly.

[0048] The terms used herein are for the purpose of describing various examples only and are not intended to limit the disclosure. Unless the context clearly dictates otherwise, the terms "a", "an", and "the" are intended to include the plural forms as well. The terms "including", "comprising", and "having" specify 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.

[0049] Due to manufacturing techniques and / or tolerances, variations in the shapes shown in the figures may occur. Thus, the examples described herein are not limited to the specific shapes shown in the figures, but include shape variations that occur during manufacturing.

[0050] It should be noted that, herein, the term "may" is used with respect to examples, e.g., with respect to what an example may include or implement, meaning that there is at least one example in which such a feature is included or implemented, while not all examples are so limited.

[0051] For illustrative purposes, the object side may be referred to as the front and the image side may be referred to as the rear. In addition, in a direction perpendicular to the optical axis, the direction away from the optical axis may be referred to as the outer side, and the direction toward the optical axis may be referred to as the inner side.

[0052] The features of the examples described herein may be combined in various ways that will be apparent after understanding the present disclosure. In addition, although the examples described herein have various configurations, other configurations that will be apparent after understanding the present disclosure are also possible.

[0053] Aspects of the present disclosure include, but are not limited to, a lens assembly that improves the bonding reliability between a lens barrel and a filter and prevents the performance of the lens assembly from deteriorating due to an adhesive.

[0054] Reference will be made to Figures 1 to 6 describe a lens assembly according to a first embodiment.

[0055] Figure 1 is a perspective view of a lens assembly according to an embodiment of the present disclosure, and Figure 2 is a cross-sectional view of a lens assembly according to an embodiment of the present disclosure.

[0056] The lens assembly 1 according to the first embodiment may include a lens 20, a lens barrel 10, and a filter 50.

[0057] A plurality of lenses 20 may be provided. A part of the plurality of lenses 20 may be disposed inside the lens barrel 10. Specifically, a part of the plurality of lenses 20 may be disposed in a hole that penetrates the lens barrel 10 in the optical axis direction. At least a part of the lens disposed on the foremost side on the object side among the plurality of lenses 20 may be exposed to the outside of the lens barrel 10.

[0058] The plurality of lenses 20 may be arranged in the optical axis direction. A spacer 30 may be provided between the plurality of lenses 20. The spacer 30 may be a member for maintaining the interval between the plurality of lenses 20.

[0059] The radius of the lens barrel 10 may vary in the optical axis direction. The radius of the lens barrel 10 may narrow from the object side to the image side. Conversely, the radius of the lens barrel 10 may widen from the object side to the image side.

[0060] A cover 40 may be provided in front of the lens barrel 10. The cover 40 may be coupled to the lens barrel 10 to form a part of the lens assembly 1. The cover 40 may fix the lens disposed on the foremost side on the object side among the plurality of lenses 20 to the lens barrel 10.

[0061] Figure 3 is a view showing a part of the rear portion of a lens assembly according to a first embodiment of the present disclosure, Figure 4is a view showing a cross section taken along line I-I' of Figure 3 and Figure 5 is an enlarged view of a part of Figure 4 and Figure 6 is an enlarged view of a part of Figure 5 .

[0062] The filter 50 may be disposed behind the lens barrel 10. The filter 50 may filter light passing through the lens. The filter 50 may be an IR filter (infrared cut-off filter).

[0063] The space where the filter 50 is disposed may be provided behind the lens barrel 10. The space where the filter 50 is disposed may be formed as a space recessed from the rear of the lens barrel 10 toward the front of the lens barrel 10.

[0064] The mounting portion 100 where the filter 50 is disposed may be provided behind the lens barrel 10. One surface of the filter 50 may face the mounting portion 100. One surface of the filter 50 facing the mounting portion 100 may be the surface facing the object side.

[0065] The mounting portion 100 may be provided closer to the object side than the rear end portion 11 of the lens barrel 10. The mounting portion 100 may be formed by being recessed from the rear of the lens barrel 10 toward the front of the lens barrel 10. The mounting portion 100 may form a step with the rear end portion 11 of the lens barrel 10.

[0066] The mounting portion 100 may be formed along the circumference of the hole formed in the lens barrel 10. The mounting portion 100 may be further provided outside the hole formed in the lens barrel 10. The step portion 200 and the inclined portion 300, which will be described later, may be provided between the mounting portion 100 and the optical axis.

[0067] The mounting portion 100 may include a first upper surface 110, a second upper surface 120, and an avoidance groove 1000. An adhesive may be applied to the mounting portion 100. The filter 50 may be coupled to the mounting portion 100 by the adhesive.

[0068] The adhesive inlet 400 may be provided outside the mounting portion 100. When the distance measured from the object side to the image side is defined as the height, the lower surface of the adhesive inlet 400 may be provided at a position higher than the upper surface of the mounting portion 100. The adhesive may be injected through the adhesive inlet 400, and the injected adhesive may be applied to the mounting portion 100. The adhesive inlet 400 may be provided as a plurality. The plurality of adhesive inlets 400 may be provided at intervals along the circumferential direction of the mounting portion 100.

[0069] The avoidance groove 1000 can be formed by being recessed from the upper surface of the mounting portion 100 in the optical axis direction. The avoidance groove 1000 can be provided between the first upper surface 110 and the second upper surface 120 of the mounting portion 100. The mounting portion 100 can be formed along the inner circumferential surface of the lens barrel 10. When viewed from the rear of the lens barrel 10, the avoidance groove 1000 can have an annular shape.

[0070] Based on the avoidance groove 1000, the first upper surface 110 can be the surface provided on the outer side in the direction perpendicular to the optical axis, and the second upper surface 120 can be the surface provided on the inner side in the direction perpendicular to the optical axis.

[0071] Based on a cross-section parallel to the optical axis, the avoidance groove 1000 can include a first inclined surface 1100 and a second inclined surface 1200. The first inclined surface 1100 and the second inclined surface 1200 can be connected to each other. The first inclined surface 1100 can be set at an obtuse angle with the first upper surface 110 of the mounting portion 100, and the second inclined surface 1200 can be set at an obtuse angle with the second upper surface 120 of the mounting portion 100. The first inclined surface 1100 and the second inclined surface 1200 can be set at an obtuse angle.

[0072] Therefore, when the filter 50 is provided on the mounting portion 100, the filter 50 and the first inclined surface 1100 can form a first acute angle θ1, and the filter 50 and the second inclined surface 1200 can form a second acute angle θ2. Specifically, a virtual line obtained by extending the first inclined surface 1100 forms the first acute angle θ1 with the lower surface of the filter 50, and a virtual line obtained by extending the second inclined surface 1200 forms the second acute angle θ2 with the lower surface of the filter 50.

[0073] The position of the first upper surface 110 can be higher than the position of the second upper surface 120. That is, when the filter 50 is provided on the mounting portion 100, the distance from the first upper surface 110 to the filter 50 can be shorter than the distance from the second upper surface 120 to the filter 50.

[0074] The step portion 200 can be provided inside the lens barrel 10. The step portion 200 can be formed to protrude from the inner surface of the lens barrel 10 in the direction perpendicular to the optical axis. When the distance measured from the object side to the image side is defined as the height, the upper surface of the mounting portion 100 can be provided at a position higher than the upper surface of the step portion 200. The height of the mounting portion 100 based on the upper surface of the step portion 200 can be a positive value.

[0075] The inclined portion 300 can be disposed between the stepped portion 200 and the mounting portion 100. The inclined portion 300 can be a surface connecting the stepped portion 200 and the mounting portion 100. In addition, the inclined portion 300 can be a surface obtained by extending the surface from the second upper surface 120. That is, the inclined portion 300 can be a surface obtained by connecting the second upper surface 120 and the stepped portion 200. The inclined portion 300 can be a boundary distinguishing the stepped portion 200 and the mounting portion 100. An obtuse angle can be formed between the stepped portion 200 and the inclined portion 300. An obtuse angle can be formed between the mounting portion 100 and the inclined portion 300. An obtuse angle can be formed between the inclined portion 300 and the second upper surface 120 of the mounting portion 100. When the filter 50 is disposed on the mounting portion 100, an acute angle can be formed between the filter 50 and the inclined portion 300. The inclined portion 300 and the filter 50 can form a third acute angle θ3. The third acute angle θ3 can be an acute angle larger than the first acute angle θ1 and the second acute angle θ2.

[0076] The filter 50 can be disposed on the mounting portion 100, and the adhesive can be injected through the adhesive inlet 400. When the adhesive is injected into the adhesive inlet 400, the adhesive can flow between the mounting portion 100 and the filter 50 and be applied to the upper surface of the mounting portion 100. Specifically, when a fixed amount of the adhesive is injected into the adhesive inlet 400, the adhesive can flow due to gravity. The adhesive can flow between the filter 50 and the mounting portion 100 into the lens barrel 10.

[0077] When the adhesive passes between the filter 50 and the first upper surface 110 of the mounting portion 100 and reaches the avoidance groove 1000, the area of the flow path through which the adhesive flows expands, so the flow rate of the adhesive decreases and the static pressure of the adhesive increases. In this case, when the first acute angle θ1 is wide, the flow of the adhesive stops at the avoidance groove 1000, and the adhesive can form an interface between the first inclined surface 1100 and the filter 50. Here, the interface can refer to the boundary between the adhesive and the air. The first acute angle θ1 can be determined as the angle at which the adhesive does not form an interface between the first inclined surface 1100 and the filter 50. Since the interface formed by the adhesive between the first inclined surface 1100 and the filter 50 can vary according to the amount of the adhesive and the viscosity of the adhesive, the magnitude of the first acute angle θ1 can be determined according to the amount of the adhesive and the viscosity of the adhesive.

[0078] If the adhesive does not form an interface between the first inclined surface 1100 and the filter 50, the avoidance groove 1000 may be filled with a part of the adhesive, and the adhesive may continue to flow between the filter 50 and the second upper surface 120. The adhesive flowing between the filter 50 and the second upper surface 120 may form an interface between the inclined portion 300 and the filter 50, and the flow of the adhesive may stop.

[0079] When the adhesive passes between the filter 50 and the placement portion 100 and reaches the inclined portion 300, the area of the flow path through which the adhesive flows expands, so the flow rate of the adhesive decreases and the static pressure of the adhesive increases. In this case, the adhesive forms an interface between the filter 50 and the inclined portion 300, and the flow of the adhesive stops.

[0080] When the longest distance from the interface measured in the direction perpendicular to the optical axis based on the contact position of the placement portion 100 and the inclined portion 300 is defined as the interface distance X, the interface distance X may become shorter as the third acute angle θ3 increases. Conversely, the interface distance X may become longer as the third acute angle θ3 decreases.

[0081] In addition, the interface distance X may vary according to the viscosity of the adhesive. The higher the viscosity of the adhesive, the shorter the interface distance X may be. Conversely, the lower the viscosity of the adhesive, the longer the interface distance X may be.

[0082] Reference will be made to Figures 7 to 9 describe the lens assembly according to the second embodiment.

[0083] Figure 7 is a view showing a part of the rear portion of the lens assembly according to the second embodiment of the present disclosure, Figure 8 is a view showing Figure 7 a cross-section taken along line II-II', and Figure 9 is a view showing Figure 7 a cross-section taken along line III-III'.

[0084] In the following description, repeated descriptions of the same content as in the first embodiment may be omitted.

[0085] The placement portion 101 may be formed along the circumferential surface of the hole penetrating the lens barrel 10 in the optical axis direction. The placement portion 101 may be further provided outside the hole formed in the lens barrel 10.

[0086] The mounting portions 101 can be provided in plural. The plural mounting portions 101 can be provided to be spaced apart from each other in the circumferential direction of the lens barrel 10. Each of the plural mounting portions 101 can be rotationally symmetric with respect to the optical axis. The stepped portion 201 and the inclined portion 301 can be provided between the mounting portion 101 and the optical axis.

[0087] The inclined portion 301 can be the boundary between the stepped portion 201 and the mounting portion 101. The inclined portion 301 can be provided between the mounting portion 101 and the stepped portion 201. The inclined portion 301 can be provided in plural. Each of the plural inclined portions 301 can be provided to correspond to each of the plural mounting portions 101.

[0088] The separation space 500 can be provided between the plural mounting portions 101. The separation space 500 can communicate with the air passage 600 which will be described later.

[0089] The adhesive inlet 401 can be provided outside the mounting portion 101. The adhesive inlet 401 can be provided in plural. The adhesive inlet 401 can be provided for each of the plural mounting portions 101. The plural adhesive inlets 401 can be provided to be rotationally symmetric with respect to the optical axis. The plural adhesive inlets 401 can be provided to be spaced apart from each other in the circumferential direction of the lens barrel 10.

[0090] The plural air passages 600 can be provided. The plural air passages 600 can be provided to be spaced apart from each other in the circumferential direction of the lens barrel 10. Each of the plural air passages 600 can be rotationally symmetric with respect to the optical axis. The air passage 600 can be provided outside the separation space 500. The air passage 600 can communicate with the separation space 500.

[0091] When the filter 50 is provided on the mounting portion 101, air can flow into the lens barrel 10 through the air passage 600 and the separation space 500. Conversely, air can be discharged to the outside of the lens barrel 10 through the separation space 500 and the air passage 600. Therefore, when the filter 50 is provided on the mounting portion 101 and the adhesive is injected into the adhesive inlet 401, air can flow to the inside and outside of the lens barrel 10, so that the adhesive can flow smoothly.

[0092] Reference will be made to Figures 10 to 12 describe the lens assembly according to the third embodiment. Figure 10 is a view showing a part of the rear portion of the lens assembly according to the third embodiment of the present disclosure, Figure 11 is a view showing Figure 10 a cross section taken along the line IV-IV', and Figure 12 is a view showing Figure 10 a cross section taken along the line V-V'.

[0093] In the following description, the repetitive description of the same content as that of the first embodiment and the second embodiment may be omitted.

[0094] The placement portions 102 may be provided in plurality. The plurality of placement portions 102 may be provided to be rotationally symmetric with respect to the optical axis. The plurality of placement portions 102 may be provided to be spaced apart from each other in the circumferential direction of the lens barrel 10. The stepped portion 202 and the inclined portion 302 may be provided between the plurality of placement portions 102 and the optical axis.

[0095] The inclined portion 302 may be a boundary that distinguishes the stepped portion 202 and the placement portion 102. The inclined portion 302 may be provided in plurality. Each of the plurality of inclined portions 302 may be provided to correspond to each of the plurality of placement portions 102.

[0096] The separation space 501 may be provided between the plurality of placement portions 102. The separation space 501 may communicate with the air passage 601. The adhesive inlet 402 may be provided outside the plurality of placement portions 102. The adhesive inlet 402 may be provided in plurality. The adhesive inlet 402 may be provided to correspond to each of the plurality of placement portions 102.

[0097] The plurality of placement portions 102 may include a first upper surface 111, a second upper surface 121, and an avoidance groove 1001.

[0098] The avoidance groove 1001 may be formed to be recessed from the upper surface of the placement portion 102 in the optical axis direction.

[0099] The avoidance groove 1001 may be provided between the first upper surface 111 and the second upper surface 121 of the placement portion 102. Based on the avoidance groove 1001, the first upper surface 111 may be a surface provided on the outside in the direction perpendicular to the optical axis, and the second upper surface 121 may be a surface provided on the inside in the direction perpendicular to the optical axis.

[0100] Based on a cross-section parallel to the optical axis, the avoidance groove 1001 may include a first inclined surface 1101 and a second inclined surface 1201. The first inclined surface 1101 and the second inclined surface 1201 may be connected to each other. The first inclined surface 1101 may be provided at an obtuse angle with the first upper surface 111 of the placement portion 102, the second inclined surface 1201 may be provided at an obtuse angle with the second upper surface 121 of the placement portion 102, and the first inclined surface 1101 and the second inclined surface 1201 may be provided at an obtuse angle.

[0101] When viewed from the rear of the lens barrel 10, the avoidance groove 1001 may be provided between the adhesive inlet 402 and the inclined portion 302. Further, when viewed from the rear of the lens barrel 10, one end portion and the other end portion of the avoidance groove 1001 may be formed to extend to the inner surface of the lens barrel 10, respectively. Further, the avoidance groove 1001 may be formed along the inclined portion 302 and may be provided to be spaced apart from the inclined portion 302.

[0102] As described above, according to the present disclosure, it is possible to prevent defects of the lens assembly caused by the adhesive applied between the lens barrel and the filter.

[0103] Although specific examples have been shown and described above, it will be apparent after understanding the present disclosure that various changes in form and detail may be made to these examples without departing from the spirit and scope of the claims and their equivalents. The examples described herein are to be understood in a descriptive sense only and not for purposes of limitation. The description of the features or aspects in each example should be considered applicable to similar features or aspects in other examples. Appropriate results can still be achieved if the described techniques are performed in a different order, and / or if the components in the described systems, architectures, devices, or circuits are combined in a different way and / or replaced or supplemented by other components or their equivalents. Therefore, the scope of the present disclosure is not limited by the specific embodiments, but by the claims and their equivalents, and all variations within the scope of the claims and their equivalents should be understood to be included in the present disclosure.

Claims

1. A lens assembly, characterized in that, The lens assembly includes: A lens barrel; A lens disposed on the lens barrel; and A filter configured to filter light passing through the lens, wherein the lens barrel includes: A placement portion in which the filter is disposed; and A stepped portion disposed to face the filter between the placement portion and the optical axis, and wherein a relief groove recessed in the optical axis direction is formed on the upper surface of the placement portion.

2. The lens assembly according to claim 1, wherein, The lens barrel further includes an inclined portion connecting the placement portion and the stepped portion.

3. The lens assembly according to claim 2, wherein The inclined portion forms an obtuse angle with the placement portion.

4. The lens assembly according to claim 3, characterized in that The inclined portion forms an obtuse angle with the stepped portion.

5. The lens assembly according to claim 1, wherein The lens assembly further includes an adhesive applied between the placement portion and the filter, wherein a part of the adhesive is disposed in the relief groove.

6. The lens assembly according to claim 1, wherein, The relief groove includes: A first inclined surface; and A second inclined surface extending from the first inclined surface.

7. The lens assembly according to claim 6, wherein A virtual line obtained by extending the first inclined surface forms an acute angle with the lower surface of the filter, and wherein a virtual line obtained by extending the second inclined surface forms an acute angle with the lower surface of the filter.

8. The lens assembly according to claim 1, wherein, The lens barrel further includes an adhesive inlet configured to introduce the adhesive between the filter and the placement portion, and wherein the adhesive inlet is disposed outside the placement portion with respect to the optical axis.

9. The lens assembly according to claim 8, wherein, The adhesive inlets are provided in plurality, and The plurality of adhesive inlets are arranged rotationally symmetric with respect to the optical axis.

10. Lens assembly, characterized in that, The lens assembly includes: A lens barrel; A lens disposed on the lens barrel; and A filter configured to filter light passing through the lens, wherein the lens barrel includes: A plurality of placement portions in which the filter is disposed; and A stepped portion disposed between the plurality of placement portions and the optical axis, wherein the plurality of placement portions are arranged spaced apart from each other in the circumferential direction of the lens barrel, and A separation space formed between the plurality of placement portions communicates with the outside of the lens barrel.

11. The lens assembly according to claim 10, wherein, The lens barrel further includes an air passage, and wherein the air passage communicates with the separation space.

12. The lens assembly according to claim 11, wherein, The air passages are provided in plurality, wherein the separation spaces are provided in plurality, and wherein each of the plurality of air passages is respectively connected to each of the separation spaces formed between the plurality of placement portions.

13. The lens assembly according to claim 10, wherein The lens barrel further includes an inclined portion connecting the placement portion and the stepped portion.

14. The lens assembly according to claim 13, wherein, The inclined portion forms an obtuse angle with the placement portion.

15. The lens assembly according to claim 10, wherein, A relief groove recessed in the optical axis direction is formed in each of the plurality of placement portions.

16. The lens assembly according to claim 15, wherein, The lens assembly further includes an adhesive applied between the plurality of placement portions and the filter, wherein at least a part of the adhesive is disposed in the relief groove.

17. The lens assembly according to claim 15, wherein The relief groove includes: A first inclined surface; and A second inclined surface extending from the first inclined surface.

18. The lens assembly according to claim 17, wherein, The first inclined surface and the second inclined surface form an obtuse angle.

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