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 from Korean Patent Application No. 10-2023-0140424 filed on October 19, 2023, in the Korean Intellectual Property Office, the disclosure of which is incorporated herein in its entirety for all purposes by reference. Technical Field

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

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

[0005] Adhesive can 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 usually 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, the performance of the lens assembly may be deteriorated because the adhesive is applied to a region where the adhesive is not needed, and thus a structure that allows an appropriate amount of adhesive to be applied to a required region is required.

[0007] The above information is presented as background information only to assist with an understanding of the present disclosure. No determination has been made, and no assertion is made, as to whether any of the above might be applicable as prior art with respect to the present disclosure. Summary of the invention

[0008] The purpose of providing this summary is to introduce a selection of concepts in a concise form, and these concepts will be further described in the following detailed description. This summary is not intended to identify the key features or essential features of the claimed subject matter, nor is it intended to be used to help determine the scope of the claimed subject matter.

[0009] In a 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 placement portion in which the filter is disposed; and a step portion disposed to face the filter between the placement portion and the optical axis, and wherein an avoidance groove formed to be concave in the direction of the optical axis is provided on an upper surface of the placement portion.

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

[0011] The inclined portion may form an obtuse angle with the seating portion.

[0012] The inclined portion may form an obtuse angle with the step portion.

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

[0014] The escape 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 an adhesive between the optical filter and the seating portion, and the adhesive inlet may be disposed outside the seating portion with respect to the optical axis.

[0017] The adhesive inlet may be provided in plural number, and the plural adhesive inlets may be provided to be rotationally symmetrical 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 placement portions in which the filter is disposed; and a step portion disposed between the plurality of placement portions and an optical axis, wherein the plurality of placement portions are disposed to be spaced apart from each other in a circumferential direction of the lens barrel, and separation spaces formed between the plurality of placement portions are connected to 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 plural, the separation space may be provided in plural, and each of the plurality of air passages may be respectively connected to each of the separation spaces formed between the plurality of seating portions.

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

[0022] The inclined portion may form an obtuse angle with the seating portion.

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

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

[0025] The escape 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 accompanying 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 diagram showing a part of the rear portion of the lens assembly according to the first embodiment of the present disclosure.

[0031] Figure 4 It is shown along Figure 3 FIG. 5 is a diagram of a cross section taken along line II'.

[0032] Figure 5 yes Figure 4 A magnified view of a portion of .

[0033] Figure 6 yes Figure 5 A magnified view of a portion of .

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

[0035] Figure 8 It is shown along Figure 7 FIG. 5 is a diagram of a cross section taken along line II-II'.

[0036] Fig. 9 It is shown along Figure 7 FIG. 5 is a diagram of a cross section taken along line III-III'.

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

[0038] Fig.11 It is shown along Fig.10 FIG. 5 is a diagram of a cross section taken along line IV-IV'.

[0039] Fig.12 It is shown along Fig.10 A diagram of a cross section taken along line V-V'.

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

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

[0042] The following specific embodiments are provided to help the reader gain a comprehensive understanding of the methods, devices and / or systems described herein. However, various changes, modifications and equivalents of the methods, devices and / or systems described herein will be apparent after understanding the present disclosure. For example, the order of operations described herein is merely an example, and except for operations that must occur in a particular order, it is not limited to the order set forth herein, but can be changed, which will be apparent after understanding the present disclosure. In addition, for greater clarity and brevity, descriptions of features known in the art may be omitted.

[0043] The features described herein may be implemented in different forms and should not be construed as being limited to the examples described herein. Rather, the examples described herein are provided merely to illustrate some of the many possible ways to implement the methods, devices, 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, a region, or a substrate is described as being “on,” “connected to,” or “coupled to” another element, the element may be directly “on,” “connected to,” or “coupled to” the other element, or one or more other elements may be present between the element and the other element. Conversely, when an element is described as being “directly on,” “directly connected to,” or “directly coupled to” another element, no other elements may be present between the element and the other element.

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

[0046] Although terms such as "first", "second" and "third" may be used herein to describe various members, components, regions, layers or portions, these members, components, regions, layers or portions are not limited by these terms. Rather, these terms are only used to distinguish one member, component, region, layer or portion from another member, component, region, layer or portion. Therefore, without departing from the teachings of the examples described herein, the first member, first component, first region, first layer or first portion mentioned in these examples may also be referred to as the second member, second component, second region, second layer or second portion.

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

[0048] The terms used herein are only used to describe various examples and are not used to limit the present disclosure. Unless the context clearly indicates otherwise, the terms "a", "an" and "the" are intended to include plural forms as well. The terms "include", "comprise" and "have" indicate the presence of the features, numbers, operations, components, elements and / or combinations thereof, but do not exclude the presence or addition of one or more other features, numbers, operations, components, elements and / or combinations thereof.

[0049] Variations in the shapes shown in the drawings may occur due to manufacturing techniques and / or tolerances. Therefore, the examples described herein are not limited to the specific shapes shown in the drawings but include variations in shapes that occur during manufacturing.

[0050] It should be noted that herein, use of the word “may” with respect to an example, such as regarding what an example may include or implement, means that there is at least one example in which such feature is included or implemented, and all examples are not limited thereto.

[0051] For the purpose of explanation, the object side may be referred to as the front side and the image side may be referred to as the back side. In addition, the direction away from the optical axis in the direction perpendicular to the optical axis may be referred to as the outside, and the direction toward the optical axis in the direction perpendicular to the optical axis may be referred to as the inside.

[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 bonding reliability between a lens barrel and an optical filter and prevents performance of the lens assembly from being deteriorated by an adhesive.

[0054] Reference Figures 1 to 6 A lens assembly according to a first embodiment is described.

[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 an optical filter 50 .

[0057] The lens 20 may be provided in a plurality. A portion of the plurality of lenses 20 may be provided inside the lens barrel 10. Specifically, a portion of the plurality of lenses 20 may be provided in a hole penetrating the lens barrel 10 in the optical axis direction. At least a portion of the most front lens provided 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 disposed in the optical axis direction. The spacer 30 may be disposed 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] The cover 40 may be disposed in front of the lens barrel 10. The cover 40 may be coupled to the lens barrel 10 to form a portion of the lens assembly 1. The cover 40 may fix the frontmost lens disposed on the object side among the plurality of lenses 20 to the lens barrel 10.

[0061] Figure 3 is a diagram showing a portion of a rear portion of a lens assembly according to a first embodiment of the present disclosure, Figure 4It is shown along Figure 3 A diagram of a cross section taken along line II' of Figure 5 yes Figure 4 an enlarged view of a portion of Figure 6 yes Figure 5 A magnified view of a portion of .

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

[0063] The space in which the optical filter 50 is disposed may be disposed at the rear of the lens barrel 10. The space in which the optical filter 50 is disposed may be a space formed to be recessed from the rear of the lens barrel 10 to the front of the lens barrel 10.

[0064] The seating portion 100 in which the optical filter 50 is disposed may be disposed at the rear of the lens barrel 10. One surface of the optical filter 50 may face the seating portion 100. One surface of the optical filter 50 facing the seating portion 100 may be a surface facing the object side.

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

[0066] The seating portion 100 may be formed along the circumference of the hole formed in the lens barrel 10. The seating portion 100 may be further disposed outside the hole formed in the lens barrel 10. A stepped portion 200 and an inclined portion 300 to be described later may be disposed between the seating portion 100 and the optical axis.

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

[0068] The adhesive inlet 400 may be provided outside the seating 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 seating portion 100. The adhesive may be injected through the adhesive inlet 400, and the injected adhesive may be applied to the seating portion 100. The adhesive inlet 400 may be provided in plurality. The plurality of adhesive inlets 400 may be provided to be spaced apart from each other along the circumferential direction of the seating portion 100.

[0069] The escape groove 1000 may be formed by being recessed from the upper surface of the seating portion 100 in the optical axis direction. The escape groove 1000 may be disposed between the first upper surface 110 and the second upper surface 120 of the seating portion 100. The seating portion 100 may be formed along the inner circumference of the lens barrel 10. When viewed from the rear of the lens barrel 10, the escape groove 1000 may have a ring shape.

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

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

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

[0073] The first upper surface 110 may be located higher than the second upper surface 120. That is, when the filter 50 is disposed on the seating portion 100, the distance from the first upper surface 110 to the filter 50 may be shorter than the distance from the second upper surface 120 to the filter 50.

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

[0075] The inclined portion 300 may be disposed between the step portion 200 and the seating portion 100. The inclined portion 300 may be a surface connecting the step portion 200 and the seating portion 100. In addition, the inclined portion 300 may be a surface obtained by extending a surface from the second upper surface 120. That is, the inclined portion 300 may be a surface obtained by connecting the second upper surface 120 and the step portion 200. The inclined portion 300 may be a boundary that distinguishes the step portion 200 from the seating portion 100. The step portion 200 and the inclined portion 300 may form an obtuse angle. The seating portion 100 and the inclined portion 300 may form an obtuse angle. The inclined portion 300 and the second upper surface 120 of the seating portion 100 may form an obtuse angle. When the optical filter 50 is disposed on the seating portion 100, the optical filter 50 may form an acute angle with the inclined portion 300. The inclined portion 300 and the optical filter 50 may form a third acute angle θ3. The third acute angle θ3 may be an acute angle greater than the first acute angle θ1 and the second acute angle θ2.

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

[0077] When the adhesive passes between the optical filter 50 and the first upper surface 110 of the placement portion 100 and reaches the avoidance groove 1000, the area of ​​the flow path through which the adhesive flows is expanded, so the flow rate of the adhesive is reduced and the static pressure of the adhesive is increased. 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 optical 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 an angle at which the adhesive does not form an interface between the first inclined surface 1100 and the optical filter 50. Since the interface formed by the adhesive between the first inclined surface 1100 and the optical filter 50 can vary according to the amount of the adhesive and the viscosity of the adhesive, the size 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 optical filter 50, the avoidance groove 1000 may be filled with a portion of the adhesive, and the adhesive may continue to flow between the optical filter 50 and the second upper surface 120. The adhesive flowing between the optical filter 50 and the second upper surface 120 may form an interface between the inclined portion 300 and the optical filter 50, and the flow of the adhesive may stop.

[0079] When the adhesive passes between the optical filter 50 and the mounting 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 optical filter 50 and the inclined portion 300, and the flow of the adhesive stops.

[0080] When the longest distance from the interface measured in a direction perpendicular to the optical axis based on the position where the seating portion 100 and the inclined portion 300 contact is defined as an 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] Will refer to Figures 7 to 9 A lens assembly according to a second embodiment is described.

[0083] Figure 7 is a diagram showing a portion of a rear portion of a lens assembly according to a second embodiment of the present disclosure, Figure 8 It is shown along Figure 7 A diagram of a cross section taken along line II-II', and Fig. 9 It is shown along Figure 7 FIG. 5 is a diagram of a cross section taken along line III-III'.

[0084] In the following description, repeated description of the same contents as those of the first embodiment may be omitted.

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

[0086] The placement portion 101 may be provided in plurality. The plurality of placement portions 101 may be provided to be spaced apart from each other in the circumferential direction of the lens barrel 10. Each of the plurality of placement portions 101 may be rotationally symmetrical with respect to the optical axis. The step portion 201 and the inclined portion 301 may be provided between the placement portion 101 and the optical axis.

[0087] The inclined portion 301 may be a boundary between the step portion 201 and the seating portion 101. The inclined portion 301 may be provided between the seating portion 101 and the step portion 201. The inclined portion 301 may be provided in plurality. Each of the plurality of inclined portions 301 may be provided to correspond to each of the plurality of seating portions 101.

[0088] The separation space 500 may be provided between the plurality of seating portions 101. The separation space 500 may communicate with an air passage 600 to be described later.

[0089] Adhesive inlet 401 can be arranged outside the placement part 101. Adhesive inlet 401 can be arranged in plurality. Adhesive inlet 401 can be arranged for each of the plurality of placement parts 101. Multiple adhesive inlets 401 can be arranged to be rotationally symmetrical with respect to the optical axis. Multiple adhesive inlets 401 can be arranged to be spaced apart from each other in the circumferential direction of the lens barrel 10.

[0090] A plurality of air passages 600 may be provided. The plurality of air passages 600 may be provided to be spaced apart from each other in the circumferential direction of the lens barrel 10. Each of the plurality of air passages 600 may be rotationally symmetrical with respect to the optical axis. The air passage 600 may be provided outside the separation space 500. The air passage 600 may be communicated with the separation space 500.

[0091] When the optical filter 50 is disposed on the seating portion 101, air may flow into the lens barrel 10 through the air passage 600 and the separation space 500. Conversely, air may be exhausted to the outside of the lens barrel 10 through the separation space 500 and the air passage 600. Therefore, when the optical filter 50 is disposed on the seating portion 101 and the adhesive is injected into the adhesive inlet 401, air may flow to the inside and outside of the lens barrel 10, and thus the adhesive may flow smoothly.

[0092] Will refer to Figures 10 to 12 A lens assembly according to a third embodiment is described. Fig.10 is a diagram showing a portion of a rear portion of a lens assembly according to a third embodiment of the present disclosure, Fig.11 It is shown along Fig.10 A diagram of a cross section taken along line IV-IV' of Fig.12 It is shown along Fig.10 A diagram of a cross section taken along line V-V'.

[0093] In the following description, repeated description of the same contents as those of the first and second embodiments may be omitted.

[0094] The placement portion 102 may be provided in plurality. The plurality of placement portions 102 may be provided to be rotationally symmetrical 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 step 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 step portion 202 from the seating 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 seating portions 102.

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

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

[0098] The escape groove 1001 may be formed to be recessed from the upper surface of the seating 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 seating portion 102. Based on the avoidance groove 1001, the first upper surface 111 may be a surface provided on the outer side in a direction perpendicular to the optical axis, and the second upper surface 121 may be a surface provided on the inner side in a 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 arranged at an obtuse angle with the first upper surface 111 of the seating portion 102, the second inclined surface 1201 may be arranged at an obtuse angle with the second upper surface 121 of the seating portion 102, and the first inclined surface 1101 and the second inclined surface 1201 may be arranged at an obtuse angle.

[0101] When viewed from the rear of the lens barrel 10, the escape groove 1001 may be provided between the adhesive inlet 402 and the inclined portion 302. In addition, when viewed from the rear of the lens barrel 10, one end and the other end of the escape groove 1001 may be formed to extend to the inner surface of the lens barrel 10, respectively. In addition, the escape 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 set forth above, according to the present disclosure, defects of a lens assembly caused by an adhesive applied between a lens barrel and an optical filter can be prevented.

[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 understood in a descriptive sense only and not for limiting purposes. The description of the features or aspects in each example should be considered to be applicable to similar features or aspects in other examples. If the described techniques are performed in a different order, and / or if the components in the described system, architecture, device or circuit are replaced or supplemented in a different manner and / or by other components or their equivalents, appropriate results can still be achieved. Therefore, the scope of the present disclosure is not limited by 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. Lens assembly, including: Lens barrel; A plurality of lenses are disposed on the lens barrel and a portion of the plurality of lenses is disposed inside the lens barrel; as well as a filter configured to filter light passing through the lens, Wherein, the lens barrel comprises: a housing portion in which the optical filter is disposed; and a step portion disposed to face the optical filter between the mounting portion and the optical axis, and Wherein, an escape groove formed to be concave in the optical axis direction is provided on the upper surface of the seating portion.

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

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

4. The lens assembly according to claim 3, wherein: The inclined portion forms an obtuse angle with the stepped portion.

5. The lens assembly of claim 1, further comprising an adhesive applied between the seating portion and the filter, in, A portion of the adhesive is disposed in the escape groove.

6. The lens assembly according to claim 1, wherein: The avoidance groove comprises: a first inclined surface; and The second inclined surface extends 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 a lower surface of the optical 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 an adhesive between the optical filter and the seating portion, and Wherein, the adhesive inlet is arranged outside the seating portion relative to the optical axis.

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

10. Lens assembly, including: Lens barrel; A plurality of lenses are disposed on the lens barrel and a portion of the plurality of lenses is disposed inside the lens barrel; as well as a filter configured to filter light passing through the lens, Wherein, the lens barrel comprises: a plurality of placement portions in which the optical filter is disposed; and a step portion disposed between the plurality of placement portions and the optical axis, wherein the plurality of placement portions are arranged to be spaced apart from each other in a circumferential direction of the lens barrel, and A separation space formed between the plurality of seating portions communicates with the outside of the lens barrel.

11. The lens assembly according to claim 10, wherein: The lens barrel also includes an air passage, and Wherein, the air passage is communicated with the separation space.

12. The lens assembly according to claim 11, wherein: The air passage is provided in a plurality of ways. Wherein, the separation space is set to be multiple, and wherein each of the plurality of air passages is respectively connected to each of the separation spaces formed between the plurality of seating portions.

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

14. The lens assembly of claim 13, wherein: The inclined portion forms an obtuse angle with the seating portion.

15. The lens assembly of claim 10, wherein: An escape groove formed to be recessed in the optical axis direction is provided in each of the plurality of seating portions.

16. The lens assembly of claim 15, further comprising an adhesive applied between the plurality of seating portions and the filter, in, At least a portion of the adhesive is disposed in the escape groove.

17. The lens assembly of claim 15, wherein: The avoidance groove comprises: a first inclined surface; and The second inclined surface extends from the first inclined surface.

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

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