Camera module and vehicle including camera module

Abstract

An imaging device module disclosed in an embodiment of the present invention includes: a lens barrel penetrating from a subject side toward a sensor side; an inner lens barrel which penetrates from the object side to the sensor side and is provided on the inner circumference of the lens barrel; the lens unit is provided with a plurality of lenses arranged on the inner side of the inner lens barrel; and a spacer disposed on a periphery of at least one of regions between adjacent lenses, in which the inner lens barrel is disposed between the plurality of lenses and the lens barrel, and the inner lens barrel may be disposed on an outer side of a first lens closest to the object among the plurality of lenses and on an outer side of a last lens closest to the image sensor.

Description

Technical Field

[0001] The present invention relates to a camera module and a vehicle comprising the camera module. Background Art

[0002] ADAS (Advanced Driver Assistance System) is an advanced driver assistance system that assists the driver. ADAS senses the situation ahead, determines the situation based on the sensed result, and controls the behavior of the vehicle based on the situation judgment. For example, ADAS detects the vehicle ahead and identifies the lane. Subsequently, when the target lane, target speed or target ahead is determined, the vehicle's electrical stability control (ESC), EMS (Engine Management System), MDPS (Motor Driven Power Steering), etc. are controlled. Generally, ADAS can be implemented as an automatic parking system, a low-speed city driving assistance system, a blind spot warning system, etc. The sensor devices used to sense the situation ahead in ADAS include GPS sensors, laser scanners, front radars, lidars, etc., and the most representative is a front camera device for taking pictures in front of the vehicle.

[0003] Recently, for the safety and convenience of the driver, research on detection systems for detecting the surroundings of the vehicle is being accelerated. Vehicle detection systems are used for various purposes, such as detecting objects around the vehicle to prevent collisions with objects that the driver has not noticed, detecting empty spaces to perform automatic parking, and providing the most basic data for automatic vehicle control. These detection systems are generally used in the form of radar signals and cameras. The vehicle camera module is built into the front and rear surveillance cameras and black box in the car, and captures the subject in a photo or video. Since the vehicle camera module is exposed to the outside, the quality of the image may deteriorate due to moisture and temperature. In particular, the camera module has the following problems: its optical characteristics change depending on the ambient temperature and the material of the lens. Summary of the Invention

[0004] Technical issues

[0005] Embodiments of the present invention provide a camera module having an inner lens barrel on one side of the inner surface of a lens barrel or on the outer surfaces of at least two lenses. Embodiments of the present invention may also provide a camera module having an inner lens barrel disposed between the lens barrel and lenses of different materials. Embodiments of the present invention may also provide a camera module having an inner lens barrel disposed on the outer surfaces of at least two lenses having different effective diameters in the lens barrel.

[0006] Embodiments of the present invention may provide a camera module having an inner barrel made of a plastic material, disposed between a lens barrel and a plurality of lenses, a flange portion of at least one of the adjacent lenses, and a spacer coupled to a groove / protrusion structure. Embodiments of the present invention may also provide a camera module having an inner barrel made of a material different from that of the lens barrel. Embodiments of the present invention may also provide a mobile device and a vehicle having a camera module.

[0007] Technical Solution

[0008] A camera module according to an embodiment of the present invention includes: a lens barrel that penetrates from an object side toward a sensor side; an inner barrel that penetrates from the object side toward the sensor side and is arranged on the inner periphery of the lens barrel; a lens portion having a plurality of lenses arranged on the inner side of the inner barrel; and a spacer that is arranged on the periphery of at least one of the areas between adjacent lenses, wherein the inner barrel is arranged between the plurality of lenses and the lens barrel, and the inner barrel can be arranged on the outside of a first lens closest to the object and on the outside of a last lens closest to the image sensor among the plurality of lenses.

[0009] According to an embodiment of the present invention, the plurality of lenses may include a plastic lens and a glass lens, the spacer may include a guide protrusion on at least one of the object side and the sensor side, and the flange portion of the lens among the lenses arranged on the object side or the sensor side of the spacer may include a guide groove, and the guide protrusion is inserted into the guide groove.

[0010] According to an embodiment of the present invention, the outer surface of the guide protrusion may have an inclined surface, and the outer surface of the guide groove may have an inclined surface. The inclined angle of the inclined surface may be in the range of 30 degrees to 60 degrees relative to the optical axis of the lens. The protrusion height of the guide protrusion may be in the range of 10 μm to 100 μm.

[0011] According to an embodiment of the present invention, the plurality of lenses include a plurality of plastic lenses and a plurality of glass lenses, the spacers are provided in plurality, and the spacers among the plurality of spacers arranged between the flange portions of adjacent plastic lenses may have a guide protrusion on each of the object side and the sensor side.

[0012] According to an embodiment of the present invention, the lens having the guide groove may be made of a plastic material, the inner barrel may be made of a plastic material, and the spacer and the lens barrel may be made of a metal material.

[0013] According to an embodiment of the present invention, the number of plastic lenses in the lens portion may be greater than the number of glass lenses, and the number of spacers in the inner barrel may be equal to or smaller than the number of plastic lenses.

[0014] 14. The camera module according to claim 13, wherein the lens barrel has a plurality of projecting lenses and a plurality of optical lenses, and the plurality of spacers have a plurality of projecting lenses. The lens barrel has a plurality of projecting lenses and a plurality of optical lenses, and the plurality of spacers have a plurality of projecting lenses. The lens barrel has a plurality of projecting lenses and a plurality of optical lenses, and the plurality of spacers have a plurality of projecting lenses. The plurality of spacers have a plurality of projecting lenses and a plurality of optical lenses, and the plurality of spacers have a plurality of projecting lenses. The plurality of spacers have a plurality of projecting lenses and a plurality of optical lenses, and the plurality of spacers have a plurality of projecting lenses. The plurality of spacers have a plurality of projecting lenses and a plurality of optical lenses, and the plurality of spacers have a plurality of projecting lenses. The plurality of spacers have a plurality of projecting lenses and a plurality of optical lenses, and the plurality of spacers have a plurality of projecting lenses. The plurality of spacers have a plurality of projecting lenses and a plurality of optical lenses, and the plurality of spacers have a plurality of projecting lenses. The plurality of spacers have a plurality of projecting lenses and a plurality of optical lenses, and the plurality of spacers have a plurality of projecting lenses. The plurality of spacers have a plurality of projecting lenses and a plurality of optical lenses, and the plurality of spacers have a plurality of projecting lenses.

[0015] According to an embodiment of the present invention, the inner barrel can be arranged outside the first lens closest to the object and outside the last lens closest to the image sensor among the multiple lenses. The inner barrel and the lens with the guide groove can be made of plastic material, and the lens barrel and the spacer can be made of metal material.

[0016] According to an embodiment of the present invention, the first lens is made of glass, the last lens is made of plastic, and the bottom of the inner barrel may be disposed between the last lens and the lens barrel.

[0017] According to an embodiment of the present invention, the lens barrel includes: a head portion arranged on the outside of the first lens, an extension portion extending inward from the head portion, a center portion extending from the extension portion in the optical axis direction, and a bottom supporting portion arranged at the lower end of the center portion and supporting the inner barrel, and the inner barrel includes: an inner head portion arranged between the outside of the first lens and the head portion, an inner extension portion extending inward from the inner head portion, an inner center portion extending from the inner extension portion in the optical axis direction, and an inner bottom portion of a flange portion arranged at the lower end of the inner center portion and supporting the last lens, and a plurality of spacers may be arranged on the inner surface of the inner center portion.

[0018] According to an embodiment of the present invention, the maximum length of the lens barrel in the optical axis direction is D1, the maximum length of the inner barrel is Dc, and the following conditions can be met: 0.7 <Dc / D1<1。

[0019] Beneficial effects

[0020] According to an embodiment of the present invention, a camera module capable of maintaining resolution despite temperature changes can be provided by stacking lenses in a heterogeneous lens barrel. That is, a camera module with a heterogeneous lens barrel can minimize the stress and decentering of lenses (e.g., plastic lenses) that expand due to temperature changes. According to an embodiment of the present invention, an inner lens barrel made of a plastic material is provided between a lens barrel and a plurality of lenses, thereby providing a camera module capable of maintaining the resolution of the optical system and suppressing deformation of the lenses despite temperature changes.

[0021] According to an embodiment of the present invention, by providing an inner barrel capable of thermal compensation and a spacer having a guide protrusion for guiding the movement of the lens in the lens barrel, stress and decentering of the plastic lens due to temperature changes can be minimized, and degradation of resolution can be prevented. According to an embodiment of the present invention, the optical reliability of the camera module can be improved, and the reliability of a vehicle camera device having the camera module can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a side sectional view of the camera module according to the first embodiment of the present invention.

[0023] Figure 2 It shows Figure 1 FIG. 1 is a diagram of a portion of a camera device module.

[0024] Figure 3 It shows Figure 2 An enlarged view of the connection between the object-side lens and the lens barrel of the camera module.

[0025] Figure 4 It shows Figure 2 FIG. 1 is a diagram of a coupling structure between a central lens and a spacer in a camera device module.

[0026] Figure 5 It shows Figure 4 FIG. 1 is a diagram of a coupling structure between a central lens and a spacer in a camera device module.

[0027] Figure 6 It shows Figure 2 An enlarged view of the connection between the sensor-side lens, the spacer, and the lens barrel in the camera module.

[0028] Figure 7 yes Figure 4 Another example of an inner barrel.

[0029] Figure 8 The second embodiment according to the present invention is shown in FIG. Figure 1 FIG. 1 is a diagram of a portion of a camera device module.

[0030] Figure 9 It shows Figure 8 FIG. 1 is a diagram illustrating a coupling structure between a central lens and a spacer in an inner lens barrel of a camera module.

[0031] Figure 10 It is an explanation Figure 9 FIG. 1 is a diagram showing the bonding structure between the inner barrel, lens, and spacer in a camera module.

[0032] Figure 11 (A) and (B) are the Figure 10 A diagram of a guide structure of a lens according to which a third spacer adjacent to a lens contracts when the lens changes from room temperature to low temperature.

[0033] Figure 12 yes Figure 2 and Figure 8 Example of deformation of a spacer in a camera module.

[0034] Figure 13 It is shown that due to Figure 12 A diagram illustrating a problem in which a gap is formed between lenses due to shrinkage of lenses in a camera module.

[0035] Figure 14a It shows that according to Figure 2 Thermal distribution diagram of the camera module's deformation due to temperature change in the optical axis direction.

[0036] Figure 14b is through Figure 12 Distribution diagram of stress (unit: MPa) measured by the camera module.

[0037] Figure 15a It shows Figure 2 FIG. 4 is a diagram of a thermal distribution diagram of a camera device module.

[0038] Figure 15b It shows Figure 12 Figure 4 shows the thermal distribution of the camera module.

[0039] Figure 16 is an example of a vehicle having a camera module according to an embodiment of the present invention. DETAILED DESCRIPTION

[0040] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The technical spirit of the present invention is not limited to some embodiments to be described, but can be implemented in various other forms, and within the scope of the technical spirit of the present invention, one or more of the components can be selectively combined and replaced for use. In addition, unless specifically defined and clearly described, the terms (including technical terms and scientific terms) used in the embodiments of the present invention can be interpreted with the meaning generally understood by ordinary technicians in the field to which the present invention belongs, and common terms such as terms defined in dictionaries should be able to interpret their meanings in consideration of the contextual meaning of the relevant technology.

[0041] The terms used in the embodiments of the present invention are used to illustrate the embodiments and are not intended to limit the present invention. In this specification, unless otherwise specifically stated in a phrase, the singular form may also include the plural form, and in the case of describing at least one (or one or more) of A and (with) B, C, it may include one or more of all combinations that can be combined with A, B and C. When describing the components of the embodiments of the present invention, terms such as first, second, A, B, (a) and (b) may be used. Such terms are only used to distinguish components from other components and may not be determined by the properties, sequence or program of the corresponding components by the terms. And when describing a component "connected", "coupled" or "engaged" to another component, the description may include not only direct connection, coupling or engagement to another component, but also "connection", "coupling" or "engagement" by another component between the component and another component. In addition, in the case of being described as being formed or arranged on "above (upper)" or "below (lower)" of each component, the description may include not only the situation where two components are in direct contact with each other, but also the situation where one or more other components are formed or arranged between the two components. In addition, when expressed as "above (up)" or "below (lower)", it can refer to the downward direction as well as the upward direction relative to an element. Several embodiments described below can be combined with each other unless it is specifically stated that they cannot be combined with each other. In addition, unless otherwise specified, the description of other embodiments can be applied to parts omitted from the description of any one embodiment among the several embodiments.

[0042] In the description of this invention, the first lens refers to the lens closest to the object side, and the last lens refers to the lens closest to the image side (or sensor surface). The last lens may include a lens adjacent to the image sensor. In the description of this invention, unless otherwise specified, all units for lens radius, thickness / distance, TTL, etc. are in mm. In this specification, the shape of a lens is expressed based on the lens' optical axis. For example, when the object-side surface of a lens is convex or concave, it means that the area near the optical axis on the object-side surface of the corresponding lens is convex or concave, not that the area around the optical axis is convex or concave. Therefore, even if the object-side surface of a lens is described as convex, the area around the optical axis on the object-side surface of the corresponding lens may be concave or may have the opposite shape. It should be noted that in this specification, the thickness and radius of curvature of a lens are measured based on the optical axis of the corresponding lens. In other words, a convex surface of a lens may mean that the lens surface in the area corresponding to the optical axis has a convex shape, and a concave surface of a lens may mean that the lens surface in the area corresponding to the optical axis has a concave shape. In addition, the “object-side surface” may mean a surface of the lens facing the object side with respect to the optical axis, and the “sensor-side surface” may mean a surface of the lens facing the sensor side with respect to the optical axis.

[0043] Figure 1 is a side sectional view of a camera module according to a first embodiment of the present invention, Figure 2 It shows Figure 1 FIG. 1 is a diagram of a portion of a camera module, Figure 3 It shows Figure 2 A diagram of a combination of a subject-side lens and a lens barrel of an imaging device module, Figure 4 It shows Figure 2 FIG. 1 is a diagram of a combined structure between a central lens and a spacer in a camera module, Figure 5 It shows Figure 4 A diagram of a combined structure between a central lens and a spacer in a camera module, and Figure 6 It shows Figure 2 An enlarged view of the combination of the sensor-side lens, spacer, and lens barrel in the camera module.

[0044] Reference Figures 1 to 6 According to an embodiment of the present invention, a camera module 1000 may include: a lens portion 100 having a plurality of lenses, a lens barrel 400 having a plurality of lenses inside, an inner barrel 200 disposed between the lens barrel 400 and the plurality of lenses, and spacers 121, 122, 123 and 124 disposed between flange portions of adjacent lenses.

[0045] The camera module 1000 includes a cover 500 provided on the upper periphery of the lens barrel 400, and the cover 500 is provided on the periphery of the object-side surface of the first lens 101 closest to the object and may extend to the upper outer side of the lens barrel 400. The cover 500 may be coupled to the periphery of the object-side surface of the flange portion 101A of the first lens 101 and the upper outer periphery of the lens barrel 400. The upper portion of the lens barrel 400 may be an object-side region of the lens barrel 400, and the lower portion may be a sensor-side region.

[0046] The lens portion 100 may include an optical system having three or more lenses stacked together, or an optical system having five or more lenses stacked together. The number of lenses in the lens portion 100 may be three or more, for example, in the range of three to eleven lenses or in the range of five to eleven lenses. The centers of the lenses in the lens portion 100 may be aligned with the optical axis Z0. The lens portion 100 may include a plurality of solid lenses. The lens portion 100 may include lenses of different materials, for example, plastic lenses and glass lenses. The lenses may include one or more plastic lenses and one or more glass lenses. The number of plastic lenses in the lens portion 100 may be greater than the number of glass lenses. The number of plastic lenses may be at least one more than the number of glass lenses, for example, 1 to 5 more. The ratio of the number of plastic lenses to the number of glass lenses may include 1:1 to 3:1.

[0047] The lenses in the lens section 100 may include spherical lenses and aspherical lenses. The spherical lens may be formed of a glass lens, and the aspherical lens may be formed of a glass lens (e.g., a glass molded lens) or a plastic lens. That is, the glass lens may be a spherical lens or an aspherical lens, and the plastic lens may be an aspherical lens. Here, a spherical lens is a lens whose object-side surface and sensor-side surface are spherical on the optical axis. An aspherical lens is an aspherical lens whose object-side surface and sensor-side surface are aspherical on the optical axis. The spherical lens may be formed of a glass material.

[0048] The first lens 101 closest to the object in the lens section 100 can be made of glass. The last lens closest to the image sensor 112 in the lens section 100 can be made of plastic. Specifically, the lenses in the lens section 100 can include the first lens 101 to the ninth lens 109 aligned with the optical axis Z0, and the last lens can be the ninth lens 109. The lens barrel 400 can be passed through in the direction from top to bottom or in the direction of the optical axis. In other words, the lens barrel 400 can pass through in the vertical direction from the object side area to the sensor side area. The inner barrel 200 can pass through in the direction from top to bottom or in the direction of the optical axis. The spacers 121 to 124 have an annular shape with a circular hole inside.

[0049] The lens barrel 400 has a first opening 401 on the upper side and a second opening 403 on the lower side in the direction of the optical axis. The first opening 401 and the second opening 403 are open in the direction of the optical axis and can be connected to each other. The lens barrel 400 is an outer barrel or a first barrel, and the distance between the outer surface of the lens and the inner surface IS1 of the lens barrel 400 can be 3 mm or less, for example, in the range of 0.7 mm to 3 mm. If the distance between the outer surface of the lens and the inner surface IS1 of the lens barrel 400 is less than the above range, the lens will not be easily assembled. If it is greater than the above range, the size of the lens barrel will increase or the lens may be tilted relative to the optical axis Z0.

[0050] The camera module 1000 may include a substrate 110 and an image sensor 112. The image sensor 112 may be provided on the substrate 110. The image sensor 112 may be provided between the last lens of the lens part 100 and the substrate 110.

[0051] The image sensor 112 may be mounted, placed, contacted, fixed, temporarily fixed, supported, or coupled to a surface of the substrate 110. According to another example, a groove or hole (not shown) capable of accommodating the image sensor 112 may be formed in the substrate 110. Embodiments are not limited to a specific form in which the image sensor 112 is disposed on the substrate 110. The substrate 110 may be a rigid PCB or an FPCB.

[0052] The image sensor 112 may be provided on the optical axis of the lens portion 100 or on an axis orthogonal to the optical axis of the lens portion 100. In this case, a reflective member such as a prism may be provided between the lens portion 100 and the image sensor 112. The image sensor 112 may convert light passing through the lens portion 100 into image data. The image sensor 112 may be any one of a CCD (charge coupled device) or a CMOS (complementary metal oxide semiconductor), a CPD, and a CID. When a plurality of image sensors 112 are present, one sensor may be a color (RGB) sensor, and the other sensors may be black and white sensors.

[0053] The camera module 1000 may include a cover glass 114 and an optical filter 116 disposed between the last lens of the lens portion 100 and the image sensor 112. The optical filter 116 may be disposed between the lens portion 100 and the image sensor 112. The optical filter 116 may filter light corresponding to a specific wavelength range for light passing through the lens. The optical filter 116 may be an infrared (IR) blocking filter that blocks infrared rays or an ultraviolet (UV) blocking filter that blocks ultraviolet rays, but embodiments are not limited thereto. The optical filter 116 may be disposed on the image sensor 112. The optical filter 116 is disposed within the second opening 403 of the lens barrel 400 to filter light of a specific wavelength that travels to the lower portion of the lens barrel 400. The cover glass 114 is disposed between the optical filter 116 and the image sensor 112 and protects the upper portion of the image sensor 112 and prevents a reduction in the reliability of the image sensor 112.

[0054] The two lenses sequentially stacked in the lens portion 100 may include at least one or all of the following configurations: a configuration in which glass lenses are sequentially stacked, a configuration in which plastic lenses are sequentially stacked, a configuration in which plastic lenses and glass lenses are sequentially stacked, and a configuration in which glass lenses and plastic lenses are sequentially stacked. The plastic material has a linear thermal expansion coefficient (CTE) that is at least 5 times higher than that of the glass material, and a value of a change in the refractive index with temperature may be at least 10 times higher than that of the glass material. Here, the unit of the thermal expansion coefficient is material value*10 -6 (°C / mm). However, because lenses made of plastic materials are easier to manufacture and more convenient to design than lenses made of glass materials, the demand for lenses made of plastic materials is increasing. In addition, glass molding materials can provide aspherical surfaces, thereby improving the thinness and optical properties of lenses.

[0055] Embodiments of the present invention can reduce the weight of the camera module 1000, provide lower manufacturing costs, suppress the degradation of optical properties due to temperature changes, enable various types of plastic lenses to replace glass lenses, and facilitate polishing and processing of lens surfaces (such as aspheric surfaces or free-form surfaces).

[0056] In camera module 1000, the lens with the largest effective diameter can be any one of the first to fourth lenses 101, 102, 103, and 104 arranged from the object side. Preferably, the lens with the largest effective diameter can be made of glass or be the first lens 101. The effective diameter can be the diameter of the effective area on which effective light is incident from each lens and is the average of the effective diameters of the object-side and sensor-side surfaces of each lens. The object-side surface of first lens 101 has the largest effective diameter of the object-side and sensor-side surfaces of each lens and can increase the amount of incident light. Each lens can include an effective area and an ineffective area. The effective area is the area corresponding to the effective diameter through which light incident on each lens passes. In other words, the effective area can be defined as the effective area or effective diameter where incident light is refracted to achieve optical properties. The ineffective area can be arranged around the effective area and can be defined as a flange portion. The ineffective area can be a region where effective light is not incident from the multiple lenses. In other words, the ineffective area can be an area unrelated to the optical properties. Furthermore, the ends of the ineffective area can be areas fixed to the structure that houses the lenses.

[0057] The lens barrel 400 has a plurality of lenses stacked along the optical axis Z0 inside, and the plurality of lenses can be combined through the first opening 401 of the lens barrel 400. The plurality of lenses can be stacked sequentially from the lens 109 closest to the sensor side to the lens 101 closest to the object. As another example, the lenses can be combined toward the object side through the sensor side opening in the lens barrel 400, or can be combined in two directions. The sensor side lens closest to the filter 116 or the image sensor 112 can be the nth lens or the last lens 109, and n can be an integer greater than or equal to 5, for example, one of 5, 6, 7, 8, 9, 10, and 11. Hereinafter, for ease of explanation, an example of a structure in which nine lenses are stacked sequentially from the sensor side in the lens barrel 400 will be described.

[0058] The first to ninth lenses 101 to 109 can be aligned with the optical axis Z0. The second lens 102 can be arranged between the first lens 101 and the third lens 103. The fourth lens 104 can be arranged between the third lens 103 and the fifth lens 105, the sixth lens 106 can be arranged between the fifth lens 105 and the seventh lens 107, and the eighth lens 108 can be arranged between the seventh lens 107 and the ninth lens 109. The lens section 100 can include a cemented lens that joins two adjacent lenses. The cemented lens can be a cemented fifth and sixth lens, a cemented sixth and seventh lens, or a cemented seventh and eighth lens. For example, the sensor-side surface of the sixth lens 106 and the object-side surface of the seventh lens 107 can be cemented to each other. The cemented lens can be made of the same plastic material. The absolute values ​​of the radii of curvature of the cemented lens surfaces of the cemented lens can be the same. The lenses in the cemented lens can have opposite refractive powers and compensate for chromatic aberration.

[0059] The first lens 101 can be formed of a glass material. The first lens 101 can have a convex object-side surface S1 and a concave sensor-side surface S2 on the optical axis. Since the object-side surface S1 of the first lens 101 has a convex shape on the optical axis, it can prevent the accumulation of external foreign matter or the reduction of incident light. The first lens 101 can be spherical or aspherical. As another example, the first lens 101 can have a shape on the optical axis in which the object-side surface S1 is concave and the sensor-side surface S2 is concave. Alternatively, the first lens 101 can have a shape with both sides concave on the optical axis. The first lens 101 made of glass can reduce changes in the center position and curvature radius due to temperature changes in the surrounding environment and can protect the incident side surface of the optical system 1000. Hereinafter, the object-side surface of each lens can be the incident side surface on which light is incident, and the sensor-side surface can be the exit side surface from which light is emitted.

[0060] The second through ninth lenses 102 through 109 can have positive (+) or negative (-) refractive power along the optical axis Z0. The second through ninth lenses 102 through 109 can have diameters smaller than that of the first lens 101. The diameter of each lens is greater than its effective diameter, is its maximum length in a direction perpendicular to the optical axis Z0, and is the average of the diameters of the object-side surface S1 and the sensor-side surface S2 of each lens. The diameter can gradually decrease from the first lens 101 to the last lens, and at least two lenses in the intermediate lens section, from the third lens 103 through the eighth lens 108, can have the same diameter as the two adjacent lenses. The intermediate lens section is the lens group excluding the first lens 101 and the last lens 109.

[0061] The second lens 102 may have a convex meniscus shape facing the object. Alternatively, the second lens 102 may have a biconvex or biconcave shape along the optical axis. Alternatively, the second lens 102 may have a convex meniscus shape facing the sensor. The second lens 102 may be formed of a plastic material or a glass material, and may be formed of a glass material, for example. The object-side and sensor-side surfaces of the second lens 102 may be spherical.

[0062] The third lens 103 may have a convex meniscus shape facing the sensor on the optical axis. Alternatively, the third lens 103 may have a convex meniscus shape facing the object on the optical axis. Alternatively, the third lens 103 may have a biconvex or biconcave shape. The third lens 103 may be formed of a plastic material or a glass material, for example, a plastic material. The object-side and sensor-side surfaces of the third lens 103 may be aspherical.

[0063] The fourth lens 104 can have a shape that is convex on both sides along the optical axis. Alternatively, the fourth lens 104 can have a convex meniscus shape or a biconcave shape that faces the sensor. The fourth lens 104 can be formed of a plastic material or a glass material, for example, a glass material or an injection molded material. The object-facing and sensor-facing surfaces of the fourth lens 104 can be spherical or aspherical.

[0064] The fifth lens 105 may have a convex meniscus shape facing the sensor on the optical axis. Alternatively, the fifth lens 105 may have a convex meniscus shape facing the object on the optical axis. Alternatively, the fifth lens 105 may have a biconvex or biconcave shape. The fifth lens 105 may be formed of a plastic material or a glass material, for example, a plastic material. The object-side and sensor-side surfaces of the fifth lens 105 may be aspherical.

[0065] The sixth lens 106 may have a shape that is convex on both sides along the optical axis. Alternatively, the sixth lens 106 may have a convex meniscus shape or a biconcave shape that faces the object along the optical axis. The sixth lens 106 may be formed of a plastic material or a glass material, for example, a plastic material. The object-facing and sensor-facing surfaces of the sixth lens 106 may be aspherical.

[0066] The seventh lens 107 may have a shape that is concave on both sides along the optical axis. Alternatively, the seventh lens 107 may have a convex meniscus shape facing the object along the optical axis, or may have a biconvex shape. The sixth lens 106 may be formed of a plastic material or a glass material, for example, a plastic material. The object-facing and sensor-facing surfaces of the sixth lens 106 may be aspherical.

[0067] The eighth lens 108 may have a convex shape on both sides along the optical axis. Alternatively, the eighth lens 108 may have a convex meniscus shape facing the object or sensor. In contrast, the eighth lens 108 may have a concave shape on both sides. The eighth lens 108 may be formed of a plastic material or a glass material, and may be formed of a plastic material, for example. The object-facing and sensor-facing surfaces of the eighth lens 108 may be aspherical.

[0068] The sixth lens 106 and the seventh lens 107 may be a cemented lens. The sensor-side surface of the sixth lens 106 and the object-side surface of the seventh lens 107 may be cemented. The sixth lens 106 and the seventh lens 107 may have opposite refractive powers. The product of the refractive power of the object-side lens of the cemented lens and the refractive power of the sensor-side lens may be less than 0. The product of the focal length of the object-side lens of the cemented lens and the focal length of the sensor-side lens may be less than 0. This improves the aberration characteristics of the optical system. However, if the two lenses of the cemented lens have the same refractive power, there are limitations on the improvement of aberrations.

[0069] The ninth lens 109 can have a convex meniscus shape facing the sensor on the optical axis. The ninth lens 109 can also have a convex meniscus shape facing the object on the optical axis. Alternatively, the ninth lens 109 can have a bi-concave or bi-convex shape on the optical axis Z0. The object-side and sensor-side surfaces of the ninth lens 109 can be aspherical. The ninth lens 109 can be made of plastic or glass, and can be, for example, plastic. The last lens 109 is closest to the image sensor 400 and is made of plastic. Therefore, the lens surface having an aspherical surface can improve optical performance, thereby minimizing the impact on aberration characteristics and resolution. Furthermore, by placing the plastic lens closest to the image sensor 112, the plastic lens can be less sensitive to assembly tolerances than a glass lens. In other words, being insensitive to assembly tolerances means that even if the lens is assembled slightly different from the design during assembly, optical performance is not significantly affected.

[0070] The spacers 121 to 124 in the lens barrel 400 or the inner barrel 200 may be provided in a number less than the number of lenses. The spacers 121 to 124 may be provided on the outer periphery between two adjacent lenses and may absorb or block light that deviates from the effective path. The spacers 121 to 124 may separate the outer periphery between two adjacent lenses and control the effective light path.

[0071] The first spacer 121 may be provided on the periphery between the third lens 103 and the fourth lens 104, and may maintain the distance between the flange portions 103A and 104A of the third lens 103 and the fourth lens 104. The second spacer 122 may be provided on the periphery between the fourth lens 104 and the fifth lens 105, and may maintain the distance between the flange portions 104A and 105A of the fourth lens 104 and the fifth lens 105. The third spacer 123 may be provided on the periphery between the fifth lens 105 and the sixth lens 106, and may maintain the distance between the flange portions 105A and 106A of the fifth lens 105 and the sixth lens 106. The fourth spacer 124 may be provided on the periphery between the seventh lens 107 and the eighth lens 108, and may maintain the distance between the flange portions 107A and 108A of the seventh lens 107 and the eighth lens 108.

[0072] Each of the first to fourth spacers 121 to 124 may have an annular shape. The outer surfaces of the first to fourth spacers 121 to 124 may be spaced apart from the inner surface IS1 of the lens barrel 400. The outer surfaces of the first to fourth spacers 121 to 124 may have an area in contact with the inner surface IS2 of the inner barrel 200 and an area not in contact with the inner surface IS2. At least one of the first to fourth spacers 121 to 124 may not be in contact with the inner surface IS2 of the inner barrel 200. The first to fourth spacers 121 to 124 may be made of a metal material or a non-metal material, and, for example, may be formed of an aluminum material or a plastic material.

[0073] When the first to fourth spacers 121 to 124 are made of metal, the first to fourth spacers 121 to 124 can conduct heat transferred from the lens to the inner barrel 200. When the first to fourth spacers 121 to 124 are made of metal, the thermal expansion coefficient between the metal material and the plastic lens is 10*10 -6(°C / mm) or greater. When the first to fourth spacers 121 to 124 are made of a heat dissipation material, the first to fourth spacers 121 to 124 can dissipate the heat conducted through the flange portion of the glass lens. When the spacers 121 to 124 are made of a metal material, the spacers 121 to 124 may include at least one of the following: In, Ga, Zn, Sn, Al, Ca, Sr, Ba, W, U, Ni, Cu, Hg, Pb, Bi, Si, Ta, H, Fe, Co, Cr, Mn, Be, B, Mg, Nb, Mo, Cd, Sn, Zr, Sc, Ti, V, Eu, Gd, Er, Lu, Yb, Ru, Y, and La. As another example, the surfaces of the first to fourth spacers 121 to 124 may be coated with an oxide film, and the oxide film may be an oxide material treated with black oxide or brown oxide using copper.

[0074] The camera module 1000 according to an embodiment may include an aperture stop. The aperture stop can adjust the amount of light incident on the optical system 1000. The aperture stop can be positioned at a set position. For example, the aperture can be a first spacer 121 positioned around the third lens 103 and the fourth lens 104. Alternatively, the first spacer 121 can have a light-blocking material coated on its surface and function as the aperture stop. Conversely, the periphery of the sensor-side surface of the third lens 103 or the periphery of the object-side surface of the fourth lens 104 can be coated with a light-blocking material to function as an aperture stop for controlling the amount of light.

[0075] The cover 500 can be made of a metal or non-metal material such as aluminum or copper. The lens barrel 400 can be made of a metal or non-metal material such as aluminum or copper. The cover 500 and the lens barrel 400 can be made of the same aluminum material. Therefore, when the lens barrel 400 is made of a metal material, the heat generated by the flange portion of each lens, which is conducted through the inner barrel 200 and the spacers 121 to 124, can be indirectly dissipated, and the degradation of the optical characteristics caused by the temperature change of the camera module 1000 exposed to the outside can be prevented.

[0076] The lens barrel 400 may have inner openings 401 and 403 such that the diameter of the first opening 401 on the object side can be larger than the diameter of the second opening 403 on the sensor side. Here, the diameter of the first opening 401 can be the maximum distance from the outer surface of the flange portion 101A of the first lens 101. The diameter of the second opening 403 can be the maximum distance from the outer surface of the flange portion 109A of the last lens 109, or the minimum diameter at the lower portion. In this case, the diameter of the first lens 101 can be larger than the diameter of the last lens 109. The lens diameter is the maximum diameter between the outer surfaces of the flange portions of each lens.

[0077] The lens barrel 400 is arranged to surround the periphery of the lens part 100. The maximum length (D1) of the lens barrel 400 in the optical axis direction may be less than the maximum length of the lens part 100, and for example, may be greater than 60% of the maximum length of the lens part 100. The maximum length (Dc) of the inner lens barrel 200 in the optical axis direction may be less than the maximum length of the lens part 100, and for example, may be greater than 60% of the maximum length of the lens part 100. The maximum length of the inner lens barrel 200 in the optical axis direction may be less than the maximum length of the lens barrel 400, and may be greater than 70% of the maximum length of the lens barrel 400. The maximum length of the lens part 100 is the optical axis distance from the center of the object side surface of the first lens 101 to the sensor side surface of the last lens. The upper end portions of the inner lens barrel 200 and the lens barrel 400 may be positioned lower than the upper end portion of the flange part of the first lens 101. The upper end portions of the inner lens barrel 200 and the lens barrel 400 may be positioned on the same horizontal line, or may be aligned with a difference of 3 mm or less or 1 mm or less.

[0078] When the maximum length of the lens part 100 in the optical axis direction (Z) is TD, the maximum length of the lens barrel 400 is D1, and the maximum length of the inner lens barrel 200 is Dc, the following conditions may be satisfied.

[0079] Condition 1: Dc < D1 < TD

[0080] Condition 2: 0.6 < D1 / TD < 1 or 0.7 < D1 / TD < 1

[0081] Condition 3: 0.7 < Dc / D1 < 1 or 0.8 < Dc / D1 < 1

[0082] In the direction (X, Y) orthogonal to the optical axis Z0, the maximum inner diameter of the inner lens barrel 200 may be greater than the maximum inner diameter of the inner lens barrel 200. In the direction orthogonal to the optical axis Z0, the maximum inner diameter of the inner lens barrel 200 may be equal to or greater than the outer diameter of the first lens 101.

[0083] The inner lens barrel 200 is the second lens barrel and may be arranged between the lens part 100 and the lens barrel 400. The inner lens barrel 200 may be arranged between the outer surfaces of the plurality of lenses 101 to 109 and the inner surface of the lens barrel 400. The number of the inner lens barrels 200 may be the same as the number of the lens barrels 400. As another example, the number of the inner lens barrels 200 may be 2 or more, for example, within the range of 2 to 4, and these inner lens barrels 200 may be arranged in the optical axis direction.

[0084] The upper end portion of the lens barrel 400 may be lower than the center (e.g., Z1) of the object side surface S1 of the first lens 101. The upper end portion of the lens barrel 400 may be lower than the upper end portion (B0) of the flange portion 101A of the first lens 101. Therefore, the interval (402) between the upper end portion of the lens barrel 400 and the upper surface 501 of the cover 500 can be ensured so that a member such as a waterproof ring can be installed. The inner hole 505 (see Figure 3 ) can be smaller than the diameter of the object side surface of the first lens 101 and larger than the diameter of the upper portion 430 of the lens barrel 400. The inner side of the upper surface 501 of the cover 500 can have a stepped structure. When the first lens 101 is made of a glass molded material, the sealing force with the cover 500 can be improved. The edge of the object side surface of the flange portion 101A of the first lens 101 can be stepped or flat, and the stepped edge portion can be in close contact with the cover 500, thereby blocking foreign matter from entering from the outside. The gap 402 between the inner side of the upper surface 501 of the cover 500 and the upper end portion of the lens barrel 400 can be press-fitted with a ring member or bonded with an adhesive. The gap between the lower end portion of the side surface 503 of the cover 500 and the outer surface of the lens barrel 400 can be bonded with an adhesive 191.

[0085] The thermal expansion coefficient of the inner barrel 200 can be a material with a higher thermal expansion coefficient than that of the lens barrel 400. For example, the lens barrel 400 can be made of a metal such as aluminum, and the inner barrel 200 can be made of a non-metal such as a resin or plastic. The lens barrel 400 can have a thermal expansion coefficient of less than 30, and the inner barrel 200 can have a thermal expansion coefficient of 50 or greater. The difference in thermal expansion coefficients between the inner barrel 200 and the lens barrel 400 can be 20 or greater. The inner barrel 200 can have a thermal expansion coefficient difference of 3 or less or 2 or less with the thermal expansion coefficient of the plastic lens, or the inner barrel 200 can have the same thermal expansion coefficient as the thermal expansion coefficient of the plastic lens.

[0086] When lens barrel 400 is injection molded from metal, the following issues arise: The dimensions of the inner area are difficult to manage, and diameter deviations may occur. Specifically, the eccentricity between the inner diameter and the inner diameter used to align the lenses is inferior to that of injection-molded products. Furthermore, most automotive lenses in lens barrel 400 are made of glass. With glass, dimensional deviations occur due to the processing and manufacturing of each individual product. Furthermore, the eccentricity between the outer diameter and the outer diameter used to align the lenses may be inferior to that of injection-molded products, and the manufacturing cost of the lenses becomes higher than that of injection-molded products. The present invention manufactures inner barrel 200 as a plastic injection-molded product, places it within lens barrel 400, and provides a space between lens barrel 400 and inner barrel 200. Inner barrel 200 has a hole extending therethrough, and lenses aligned along the inner hole in the optical axis can be stacked. The lens barrel 400 may be an outer barrel having a hole therethrough, and the inner barrel 200 is inserted into the outer barrel.

[0087] When the inner barrel 200 thermally expands in a direction perpendicular to the optical axis Z0 due to the plastic lens, the inner barrel 200 moves in a direction perpendicular to the optical axis Z0 via the space between the lens barrel 400 and the inner barrel 200, thereby reducing the stress caused by the thermal expansion of the plastic lens. By providing a space between the lens barrel 400 and the inner barrel 200, the deviation between the inner diameter and outer diameter of the lens and the lens barrel 400 can be minimized, and the tolerance of the glass lens or the plastic lens can be reduced, thereby minimizing the decentration and tilt due to the tolerance. In addition, the resolution of the optical system that depends on temperature changes can be maintained by the inner barrel 200. In other words, the stress of the plastic lens that depends on temperature changes can be suppressed and the decentration can be minimized.

[0088] The inner barrel 200 may include materials or particles for light blocking or absorbing on the surface or on the inner side. The inner barrel 200 may be made of non-reflective material or light absorbing material to block interference caused by light reflection. The inner barrel 200 may be arranged between the lens barrel 400 and the plurality of lenses. In addition, the inner barrel 200 may be arranged between the lens barrel 400 and the plurality of lenses and between the lens barrel 400 and the plurality of spacers 121 to 124. Since the inner barrel 200 is arranged outside the plurality of lenses 101 to 109 and outside the plurality of spacers 121 to 124, the stress caused by thermal expansion in the lens portion 100 can be controlled.

[0089] The lens barrel 400 includes a center portion 410, a head portion 430, and a bottom support portion 420. The center portion 410 is connected between the head portion 430 and the bottom support portion 420. The inner barrel 200 includes an inner center portion 210, an inner head portion 230, and an inner bottom portion 220. The center portion 410 is disposed outside the inner center portion 210, the head portion 430 is disposed outside the inner head portion 230, and the bottom support portion 420 is disposed below the inner bottom portion 220.

[0090] The central portion 410 of the lens barrel 400 has a lens arranged inside in addition to one or two lenses in the lens portion 100, and the inner diameter may gradually decrease as the lens barrel 400 approaches the last lens 109. The inner central portion 210 may be provided outside the second lens 102 to the ninth lens 109, or may be provided outside all plastic lenses. The head portion 430 has one or two lenses arranged in the lens portion 100 close to the object, for example, the first lens 109 may be provided. The inner diameter of the head portion 430 may be larger than the inner diameter of the central portion 410. As shown in FIG. Figure 3 As shown, the area between the upper end of the central portion 410 and the lower end of the head portion 420 can be connected by an extension portion 440. The extension portion 440 can correspond to the lower surface of the inner extension portion 220 of the inner barrel 200. The inner extension portion 220 is connected between the inner central portion 230 and the central portion 210 and can be disposed outside the second lens 102.

[0091] The bottom supporting portion 420 of the lens barrel 400 may be arranged on the lower periphery of the flange portion 109A of the last lens 109. The bottom supporting portion 420 supports the lower portion of the inner bottom portion 220 of the inner barrel 200. The inner diameter of the inner bottom portion 220 may be smaller than the diameter of the last lens 109. The lower periphery of the flange portion 109A of the last lens 109 may be disposed on the inner bottom portion 220, thereby preventing the lower portion of the last lens 109 from detaching. The bottom surface of the inner bottom portion 220 may contact the bottom supporting portion 420 of the lens barrel 420.

[0092] The inner bottom portion 220 of the inner barrel 200 is disposed on the bottom support portion 420 of the lens barrel 420, and the outer surface of the inner barrel 200 and the inner surface IS1 of the lens barrel 420 can face each other at a predetermined interval. In order to prevent the inner barrel 200 from moving, a contact protrusion can be provided between the inner barrel 200 and the lens barrel 400. The contact protrusion 231 can protrude outward from the inner barrel 200. Alternatively, the contact protrusion 231 can protrude inward from the lens barrel 400. The contact protrusion 231 can be provided in a continuous annular shape or a discontinuous annular shape.

[0093] The contact protrusion 231 can be formed outside the inner head portion 230 of the inner barrel 200, or inside the head portion 430. Similarly, the contact protrusion 231 is arranged outside the inner head portion 230 of the inner barrel 200 and supports the gap between the inner head portion 230 and the head portion 430. This prevents the inner head portion 230 of the inner barrel 200 from moving outward, thereby preventing the center of the lens from being misaligned. The contact protrusion 231 can be positioned outside a lens with a low coefficient of thermal expansion, such as the first lens 101 made of glass. This is because glass lenses have little thermal deformation. Therefore, even if there is no gap between the inner head portion 230 and the head portion 430 due to the contact protrusion 231, the effects of thermal expansion transmitted to the first lens 101 can be reduced compared to those transmitted through a plastic lens.

[0094] The contact protrusion 231 may be positioned lower than the upper end portion of the inner head portion 230. The vertical thickness of the contact protrusion 231 may be less than the thickness of the flange portion 101A of the first lens 101, and may be, for example, 50% or less of the thickness of the flange portion 101A of the first lens 101. If the vertical thickness of the contact protrusion 231 exceeds 50% of the thickness of the flange portion 101A of the first lens 101, problems such as decentration may occur when the first lens 101 expands.

[0095] When a plurality of contact protrusions are arranged in the interval between the inner barrel 200 and the lens barrel 400, the first contact protrusion 231 may be defined outside the inner head portion 230, and the second contact protrusion 232 may be defined outside the center portion 210, as shown in FIG. Figure 7 As shown. The second contact protrusion 232 can be provided on the outside of a glass lens, such as the fourth lens 104. The first contact protrusion 231 can be provided on the outside of the glass first lens 101 or the second lens 102, adjacent to the object, and the second contact protrusion 232 can be provided on the outside of a glass lens disposed between plastic lenses. The second contact protrusion 232 can be formed on the outside of the inner barrel 200 or on the inside of the lens barrel 400. The vertical thickness of the second contact protrusion 232 can be less than the thickness of the flange portion 104A of the fourth lens 104, and can be, for example, 50% or less of the thickness of the flange portion 104A of the fourth lens 104. In other words, the multiple contact protrusions 231 and 232 provided on the outer surface of the inner barrel 200 or the inner surface of the lens barrel 400 can correspond to the outer sides of different glass lenses, respectively. The outer diameters of the multiple contact protrusions 231 and 232 can differ from one another. That is, the outer diameter of the second contact protrusion 232 may be smaller than the outer diameter of the first contact protrusion 231 .

[0096] The inner surface IS2 of the inner barrel 200 may be in contact with the outer surfaces of at least one or two or more of the flange portions 101A to 109A of the plurality of lenses 101 to 109. The inner surface IS1 of the lens barrel 400 has a plurality of step portions ST0 along a vertical surface to provide an inner diameter difference, and at least one of the plurality of step portions ST0 may correspond to the step structure of the outer surface of the inner barrel 200 and may be provided as an inclined surface. Figure 5 As shown, the inner surface IS2 of the inner barrel 200 has a plurality of inner step portions ST1 to ST4 along the vertical surface, and the outer surface of each of the inner step portions ST1 to ST4 can be in contact with the outer surface of the spacer or the outer surface of the lens. The inner barrel 200 can be bonded to at least one of the one or more spacers 121 to 124 of the plurality of lenses 101 to 109 using an adhesive (not shown). Therefore, the plurality of spacers 121 to 124 can be fixed to the inner side of the inner barrel 200 and can space adjacent lenses apart.

[0097] The camera module 1000 has a snap-fit ​​protrusion 450 arranged outside the center portion 410 of the lens barrel 400. The snap-fit ​​protrusion 450 can be combined with a configuration at the bottom, such as a base holder (not shown) or an annular holder (not shown), to support the bottom of the lens barrel 400 and set a reference position. At this time, when the lower position of the lens barrel 400 is fixed, the BFL (back focus) can be set, which is the optical axis distance between the center of the sensor-side surface of the last lens 109 and the image sensor 114.

[0098] The inner shape of the inner barrel 200 can be the same as the inner shape of the lens barrel 400. The distance between the inner surface and the outer surface of the inner barrel 200, that is, the thickness, can be equal to or less than the distance (that is, the thickness) between the inner surface IS1 and the outer surface of the lens barrel 400. The thickness of the inner barrel 200 can be 1.5 mm or less, for example, in the range of 0.7 mm to 1.5 mm or in the range of 0.7 mm to 1 mm. Here, the distance or thickness between the outer surface and the inner surface can be the distance between the outer surface and the inner surface having a vertical plane in the area corresponding to the outer surface of the lens. The distance between the inner barrel 200 and the lens barrel 400 is the distance between the outer surface of the inner barrel 200 at the center portion 210 of the inner barrel 200 and the inner surface IS1 of the lens barrel 400. This distance is greater than or equal to the distance that the plastic lens can move when expanding in a direction perpendicular to the optical axis Z0 (horizontally), and can be 0.5 mm or less, for example, in the range of 0.01 mm to 0.5 mm, or in the range of 0.01 mm to 0.2 mm. When the inner barrel 200 is made of a plastic material and the fifth lens 105 is made of a plastic material, this distance can be the maximum gap that the plastic lens can expand when thermally expanding in the horizontal direction at high temperatures (i.e., in the range of 85°C to 105°C). This distance can be 30% or less of the thickness of the inner barrel 200 (i.e., the distance between the inner and outer surfaces), for example, in the range of 1% to 30% or 1% to 20%. If the distance is smaller than the above range, at least one of the lenses may have a problem of tilting relative to the optical axis due to temperature changes, and if the distance is larger than the above range, there may be difficulties in supporting and fixing capabilities of the inner lens.

[0099] Even when the plastic lens expands at high temperatures, the minimum distance between the inner barrel 200 and the lens barrel 400 has the effect of spacing the inner barrel and the lens barrel apart from each other, or even when they expand, the stress transmitted to the lens is not large. In addition, when the lens, the inner barrel, and the plurality of lenses expand / contract at high / low temperatures, the components can be spaced apart in a structure that does not affect each other due to stress generated by changed positions or differences, for example, in a structure that does not affect the effective surface of the plastic lens.

[0100] Therefore, since the inner barrel 200 made of plastic material moves / restores horizontally between the lens barrel 400 and the lens in response to the expansion / contraction of the lens due to temperature changes, the stress transmitted to the lens can be reduced. Due to temperature changes, the inner barrel 200 can maintain the resolution of the optical system and minimize the change in optical performance. The inner barrel 200 can minimize the stress and decentering of the plastic lens caused by temperature changes. For example, the inner barrel 200 can minimize the stress generated when the plastic lens expands at high temperatures and minimize the decentering relative to the glass lens when the plastic lens contracts at low temperatures. In addition, the inner barrel 200 can minimize decentering and tilting according to the manufacturing tolerances of the glass lens. The inner barrel 200 promotes alignment between the lenses, and the lens barrel 400 is arranged outside the inner barrel 200, which can improve the optical reliability of EMI (electromagnetic interference) and ESD (electrostatic discharge), as well as the waterproof and dustproof properties under extreme environments (such as IP69K rating).

[0101] In an embodiment of the present invention, when the ratio of the plastic lens in the camera module 1000 increases, the amount of change in the direction of the optical axis Z0 at least one of the first point (Z1) on the object side or the second point (Z2) on the sensor side increases relative to the reference position (A0) due to expansion or contraction due to temperature changes. The reference position (A0) may be the position used for AA (active alignment) of an alignment device. Here, the increase in the ratio of the plastic lens includes a configuration in which the plastic lens is 1.5 times or more larger than the glass lens. In the camera module 1000, even if the plastic lens expands toward the inner barrel 200 in directions (X, Y) orthogonal to the optical axis Z0, the optical performance of the optical system can be unaffected by the distance between the inner barrel 200 and the lens barrel 400. In the camera module 1000, when the inner barrel 200 expands in the optical axis direction (Z), there is no effect on the optical system, and the lens barrel 400 and the cover 500, which have relatively small changes due to temperature changes, can be suppressed to suppress movement in the optical axis direction. The cover 500 can suppress movement of the first lens 101 made of glass in the optical axis direction.

[0102] The amount of change F1 of the lens barrel structure (200, 400) in the optical axis direction at the first point (Z1) and the amount of change (F2) of the lens barrel structure (200, 400) in the optical axis direction at the second point (Z2) can be obtained by the following equations. Here, the material of the lens barrel structure (200, 400) is described as aluminum (Al).

[0103] Formula 1: F1 = CTE(Al)*ΔT*Db

[0104] Formula 2: F2=CTE(Al)*ΔT*Da

[0105] In Equations 1 and 2, CTE(Al) is the coefficient of thermal expansion of the material of the barrel structure (200, 400), ΔT is the temperature change, Db is the length in the optical axis direction from the lower end portion of the lens barrel 400 to the boundary between the cover 500 and the flange portion 101A of the first lens 101, and Da is the length in the optical axis direction from the reference position (A0) to the lower end portion of the lens barrel 400.

[0106] If the influence of the thermal expansion coefficient of the inner barrel 200 is F3, the following formula 3 can be satisfied.

[0107] Formula 3: F3 = CTE(PC)*ΔT*Dc

[0108] In Formula 3, CTE(PC) is the thermal expansion coefficient of the plastic material of the inner barrel 200 , ΔT is the temperature change, and Dc is the length from the bottom to the top of the inner barrel 200 in the optical axis direction.

[0109] Therefore, the stress in the effective diameter direction can be minimized by the inner barrel 200, and the stress in the optical axis direction can be minimized by the constraints of the lens barrel 400 and the cover 500 made of aluminum, thereby reducing performance changes due to temperature changes. The combined structure of the inner barrel 200, the lens barrel 400, and the cover 500 can suppress the change (F1) of the first lens 101 on the object side at the first point (Z1) to 50 μm or less, and suppress the change (F2) of the last lens 109 at the second point (Z2) to 20 μm or less, that is, the change of the BFL can be suppressed to 20 μm or less, thereby reducing the decentration problem of the optical system and the impact on resolution.

[0110] In an embodiment of the present invention, when the external temperature is a low temperature below a predetermined temperature, the lens shrinks and a gap may appear in the stacking direction between the lens and the component (spacer or inner barrel). That is, a gap in the optical axis Z0 may appear in the region between the inner barrel 200 and the lens barrel 400, between the lenses 101 to 109 and the spacers 121 to 124, between the inner barrel 200 and the lenses 101 to 109, and between the inner barrel 200 and the spacers 121 to 124. The gap may cause the lens to become loose, which may lead to degradation of the optical performance of the optical system and performance deviation problems.

[0111] A composite structure may be provided in a corresponding region between the plastic lens and the spacer within the lens. The composite structure may be provided on the flange portion of the plastic lens within the lens, the object-side surface and / or sensor-side surface of the flange portion, and the spacer. For example, the composite structure may include a guide groove disposed on the flange portion and a guide protrusion coupled to the guide groove on the spacer. Therefore, when the plastic lens contracts, the guide protrusion may prevent the plastic lens from disengaging along the guide groove of the lens. As another example, a composite structure may include a guide protrusion on the flange portion and a guide groove coupled to the guide protrusion on the spacer.

[0112] like Figure 4 and Figure 5 As shown, the first spacer 121 has a first guide protrusion P1, and the flange portion 103A of the third lens 103 has a concave first guide groove FG1 on the sensor side surface. The outer surface PS1 of the first guide protrusion P1 and the outer surface FS1 of the first guide groove FG1 may have inclined surfaces, and the inclination angle of the inclined surfaces may be 5 degrees or more, for example, 5 to 85 degrees or 30 to 60 degrees, based on the optical axis Z0.

[0113] The second spacer 122 has a second guide protrusion P2, and the flange portion 105A of the fifth lens 105 has a concave second guide groove FG2 on the object-side surface. The outer surface PS2 of the second guide protrusion P2 and the outer surface FS2 of the second guide groove FG2 may have inclined surfaces, and the inclination angle of the inclined surfaces may be 5 degrees or more, for example, 5 to 85 degrees or 30 to 60 degrees, based on the optical axis Z0.

[0114] The third spacer 123 has a third guide protrusion P3, and the flange portion 106A of the sixth lens 106 has a concave third guide groove FG3 on its object-side surface. The outer surface PS3 of the third guide protrusion P3 and the outer surface FS3 of the third guide groove FG3 may have inclined surfaces, and the inclination angle of the inclined surfaces may be 5 degrees or greater, for example, 5 to 85 degrees or 30 to 60 degrees, based on the optical axis Z0. If the inclination angle is greater than the above range, the shrinkage of the plastic lens may be affected, while if the inclination angle is less than the above range, the shrinkage of the plastic lens may reduce the guiding function. Here, the protrusion heights T1, T2, and T3 of the first to third guide protrusions P1, P2, and P3 in the optical axis direction may be 10 μm or greater, and may range from 10 μm to 200 μm or 10 μm to 100 μm, for example. If the protrusion heights T1, T2, and T3 of the first to third guide protrusions P1, P2, and P3 are smaller than this range, a problem may occur in which the areas of the guide protrusions P1, P2, and P3 deviate when the plastic lens shrinks.

[0115] like Figure 6 As shown, the fourth spacer 124 has a fourth guide protrusion P4, and the flange portion 108A of the eighth lens 108 has a concave fourth guide groove FG4 on its object-side surface. The outer surface PS4 of the fourth guide protrusion P4 and the outer surface FS4 of the fourth guide groove FG4 may have inclined surfaces, and the inclination angle of the inclined surfaces may be 5 degrees or greater, for example, 5 to 85 degrees or 30 to 60 degrees, based on the optical axis Z0. Here, the protrusion height of the fourth guide protrusion P4 may be 10 μm or greater, for example, 10 to 200 μm or 10 to 100 μm. If the protrusion height of the fourth guide protrusion P4 is less than the above range, the area of ​​the fourth guide protrusion P4 may deviate when the eighth lens 108, which is made of plastic material, shrinks.

[0116] Figure 8 The second embodiment according to the present invention is shown in FIG. Figure 1 FIG. 1 is a diagram of a portion of a camera module, Figure 9 It shows Figure 8 A diagram of a coupling structure between a central lens and a spacer in an inner lens barrel of a camera module, and Figure 10 It is an explanation Figure 9 The configuration and description of the second embodiment may include the configuration and description of the first embodiment.

[0117] Reference Figures 8 to 10 According to the second embodiment of the present invention, the camera module 1000 may include: a lens portion 100 having a plurality of lenses, a lens barrel 400 in which a plurality of lenses are stacked, an inner barrel 200 disposed between the lens barrel 400 and the plurality of lenses, and spacers 121, 122, 123, and 124 disposed between the flange portions of adjacent lenses. The lens portion 100, the lens barrel 400, and the inner barrel 200 will be described with reference to the configuration of the first embodiment. In addition, the cover 500 disposed on the upper periphery of the lens barrel 400 will be described with reference to the configuration of the first embodiment.

[0118] The spacers 121 to 124 may be provided in a number less than the number of lenses. The spacers 121 to 124 may be provided on the outer periphery between two adjacent lenses and may absorb or block light that deviates from the effective path. The spacers 121 to 124 may include first to fourth spacers 121 to 124. The outer surfaces of the first to fourth spacers 121 to 124 may be spaced apart from the inner surface IS1 of the lens barrel 400. The outer surfaces of the first to fourth spacers 121 to 124 may have areas that contact the inner surface IS2 of the inner barrel 200 and areas that do not contact it. At least one of the first to fourth spacers 121 to 124 may not contact the inner surface IS2 of the inner barrel 200. The first to fourth spacers 121 to 124 may be made of a metallic material or a non-metallic material, and may be formed of, for example, aluminum or a plastic material.

[0119] The lens barrel 400 includes a center portion 410, a head portion 430, and a bottom support portion 420. The inner barrel 200 includes an inner center portion 210, an inner head portion 230, and an inner bottom portion 220. Even when the plastic lens expands at high temperatures, the minimum distance between the inner barrel 200 and the lens barrel 400 has the effect of spacing the inner barrel and the lens barrel apart from each other, or even when they expand, the stress transmitted to the lens is not large. In addition, when the lens, the inner barrel, and the plurality of lenses expand / contract at high / low temperatures, the components can be separated in a structure that does not affect each other due to stress generated by the changed position or differences, for example, in a structure that does not affect the effective surface of the plastic lens.

[0120] Therefore, since the inner barrel 200 made of plastic material moves / restores horizontally between the lens barrel 400 and the lens due to the expansion / contraction of the lens according to temperature changes, the stress transmitted to the lens can be reduced. The inner barrel 200 can maintain the resolution of the optical system according to temperature changes and minimize the change of optical performance. The inner barrel 200 can minimize the stress and decentering of the plastic lens according to temperature changes. For example, the inner barrel 200 can minimize the stress that occurs when the plastic lens expands at high temperatures and minimize the decentering with the glass lens that occurs when the plastic lens contracts at low temperatures. In addition, the inner barrel 200 can minimize decentering and tilt according to the manufacturing tolerance of the glass lens.

[0121] like Figure 9 and Figure 10As shown, the first guide protrusion P1 of the first spacer 121 is coupled to the first guide groove FG1 recessed in the flange portion 103A of the third lens 103. The outer surface PS1 of the first guide protrusion P1 and the outer surface FS1 of the first guide groove FG1 may have inclined surfaces, and the inclination angle of the inclined surfaces may be 5 degrees or more, for example, 5 to 85 degrees or 30 to 60 degrees based on the optical axis Z0.

[0122] The second guide protrusion P2 of the second spacer 122 is coupled to the second guide groove FG2 disposed on the object-side surface of the flange portion 105A of the fifth lens 105. The outer surface PS2 of the second guide protrusion P2 and the outer surface FS2 of the second guide groove FG2 may have inclined surfaces, and the inclination angle of the inclined surfaces may be 5 degrees or more, for example, 5 to 85 degrees or 30 to 60 degrees, based on the optical axis Z0.

[0123] The third guide protrusion P3 of the third spacer 123 includes a third guide groove FG3 disposed on the object-side surface of the flange portion 106A of the sixth lens 106. The outer surface PS3 of the third guide protrusion P3 and the outer surface FS3 of the third guide groove FG3 may have inclined surfaces, and the inclination angle of the inclined surfaces may be 5 degrees or greater, for example, 5 to 85 degrees or 30 to 60 degrees, based on the optical axis Z0. If the inclination angle is greater than the above-mentioned range, the shrinkage of the plastic lens may be affected, while if the inclination angle is less than the above-mentioned range, the shrinkage of the plastic lens may reduce the guiding function.

[0124] The third guide protrusion P3 of the third spacer 123 can be defined as a sensor-side guide protrusion, and the third guide groove FG3 of the flange portion 106A of the sixth lens 106 can be defined as an object-side guide groove. The third spacer 123 has an object-side guide protrusion P3a, and the flange portion 105A of the fifth lens 105 has a recessed sensor-side guide groove FG3a on its sensor-side surface. The outer surfaces of the object-side guide protrusion P3a and the outer surfaces of the sensor-side guide groove FG3a can have inclined surfaces, and the inclination angle of the inclined surfaces can be 5 degrees or greater, for example, 5 to 85 degrees or 30 to 60 degrees, based on the optical axis Z0. If the inclination angle is greater than the above range, the shrinkage of the plastic lens may be affected. If the inclination angle is less than the above range, the shrinkage of the plastic lens may reduce the guiding function.

[0125] Here, the protrusion heights T1 to T3 of the first to third guide protrusions P1 to P3 may be 10 μm or greater, for example, 10 μm to 200 μm or 10 μm to 100 μm. If the protrusion heights of the first to third guide protrusions P1 to P3 are less than the above ranges, when the plastic lens shrinks, there may be a problem of detachment from the area of ​​the guide protrusions P1 to P3. The protrusion height of the object-side guide protrusion P3a of the third spacer 123 may be 10 μm or greater, and may be in the range of, for example, 10 μm to 200 μm or 10 μm to 100 μm. The depth of the guide groove of each lens is the depth that can be guided when the guide protrusions P1 to P3 and P3a are inserted and each lens shrinks.

[0126] Figure 11 (A) shows a combination of the fifth lens 105 and the sixth lens 106 and the third spacer 123 when the camera module is at room temperature (eg, 25 degrees), and Figure 11 (B) shows an example of the contraction of the object-side fifth lens 105 and the sensor-side sixth lenses 105 and 106 of the third spacer 123 when the camera module is exposed to low temperatures (e.g., -20°C or lower, within a range of -20°C to -65°C). When the fifth and sixth lenses, made of plastic, contract, the flange 105A of the fifth lens 105 and the flange 106A of the sixth lens 106 contract in the optical axis direction (F14, F15), and the boundaries between the flange 105A of the fifth lens 105 and the effective area, as well as the boundaries between the flange 106A of the sixth lens 106 and the effective area, contract toward the center of each lens (F12, F13). At this time, the third spacer 123 and the fifth and sixth lenses 105, 106 may contract toward the center (F11, F13) due to the contraction (F10) of the inner barrel 300.

[0127] It can be seen that when the camera module is at a low temperature, the amount of shrinkage of the plastic lens is greater than that of the spacer. Therefore, the guide protrusions P3 and P3a of the third spacer 123 guide the flange portions 105A and 106A of the fifth lens 105 and the sixth lens 106 on the guide grooves FG3 and FG3a of the fifth lens 105 and the sixth lens 106 made of plastic, and the guide protrusions P3 and P3a can be set at a height that does not separate from the guide grooves FG3 and FG3a. Figure 6As shown in FIG. 1B , when the object-side surface and the sensor-side surface of the third spacer 123 are spaced apart from the flange portions 105A and 106A of the fifth lens 105 and the sixth lens 106, the guide protrusions P3 and P3a support the flange portions 105A and 106A of the fifth lens 105 and the sixth lens 106. Therefore, since the flange portions 105A and 106A of the fifth lens 105 and the sixth lens 106 are contracted along the inclined guide protrusions P3 and P3a on the third spacer 123, it is possible to minimize degradation of the optical performance or performance deviation of the optical system.

[0128] Spacers 121 to 124 are provided with guide protrusions on at least one or both of the object side and the sensor side, and these guide protrusions can be combined with guide grooves on the flange portion of the plastic lens in the corresponding area. Alternatively, spacers 121 to 124 are provided with guide grooves on at least one or both of the object side and the sensor side, and these guide grooves can be combined with guide protrusions on the flange portion of the plastic lens in the corresponding area. In other words, the guide structure for shrinking the lens is such that when the lens has a guide groove, the spacer is provided with a guide protrusion, and conversely, when the lens has a guide protrusion, the spacer can be provided with a guide groove.

[0129] Figure 12 yes Figure 2 and Figure 8 A modified example of the camera module. Figure 12 As shown, the camera module 1001 is a modified spacer configuration and is a structure in which at least one or all of the spacers 121A, 122A, 123A, and 124A arranged inside the inner barrel 200 do not have the guide protrusions disclosed above. If the spacers 121A, 122A, 123A, and 124A do not have the guide protrusions, the glass lens can be arranged on the object side or the sensor side of the spacer. Figure 13 As shown in (B), if there is no coupling structure such as a connecting guide protrusion and a guide groove between adjacent spacers and plastic lenses, when the lens shrinks, a problem of gaps K1 to K5 may occur between the flange portion of the lens and the spacer or the inner barrel.

[0130] In detail, Figure 13 (A) shows that when Figure 12 A diagram of the flange portion of the seventh to ninth lenses of the camera device module at room temperature, and Figure 13 (B) shows that when Figure 12 FIG. 1 is a diagram showing an example in which the seventh to ninth lenses of the camera module are shrunk at low temperatures and a gap is generated between the flange portions. Figure 13 As shown, it can be seen that when Figure 12When the camera module is at a low temperature and there is no guide protrusion in the spacer 124A, a gap K1 is generated between the flange portion 107A of the seventh lens 107 and the spacer 124A, a gap K2 is generated between the flange portion 108A of the eighth lens 108 and the spacer 124A, and a gap K3 is generated between the flange portion 108A of the eighth lens 108 and the flange portion 109A of the ninth lens 109. In addition, a gap K4 is generated between the flange portion 109A of the ninth lens 109 and the inner bottom portion 220 of the inner barrel 200, and a gap K5 is generated between the inner bottom portion 220 of the inner barrel 200 and the bottom support portion 420 of the lens barrel 420. Due to these gaps K1 to K5, looseness may occur between the lenses 107 to 109. In order to eliminate this looseness, as in Figure 2 As in the camera device module of the embodiment, the present invention utilizes a guiding structure such as a guiding protrusion of a spacer and a guiding groove of a lens, so that when the lens is retracted, the contact state between the lens and the spacer can be maintained along the inclined surface of the guiding structure, and the influence on the degradation of the optical performance or performance deviation of the optical system can be minimized.

[0131] Figure 14a It shows Figure 2 The thermal distribution diagrams E1 to E9 of the deformation (unit: μm) in the optical axis direction according to the temperature change in the camera module 1000 are shown, and it can be seen that the deformation F1 toward the first point Z1 relative to the reference position A0 is 50 μm or less, and the deformation F2 toward the second point Z2 is 20 μm or less. It can be seen that the thermal distribution diagram E1 is Figure 14a The head region A2 of the inner barrel 200 is lower than in other regions. Figure 14b pass Figure 12 Stress distributions C1 to C9 (unit: MPa) were measured for the camera module. It can be seen that the effects of temperature-dependent stress are only affected by the flange area A10 of the lens. In other words, even without the guide protrusions on the separate spacer, the stress effects do not affect the effective surface of the lens.

[0132] Figure 15a yes Figure 2 Thermal distribution diagrams G1 to G9 of the camera module, and Figure 15b It shows Figure 12 FIG. 1 is a diagram of thermal distribution diagrams H1 to H9 of a camera device module. Figure 15a and Figure 15b : is a graph comparing heat distribution patterns according to the presence or absence of guide protrusions in the spacer in the camera module. Figure 15a and Figure 15bIn the thermal distribution diagram of FIG, it can be seen that in the area A21 at the lower corner or sensor side corner of the camera module, the thermal distribution G1 of the camera module with the guide protrusion on the spacer is improved compared with the thermal distribution H1 of the camera module without the guide protrusion on the spacer. Figure 15b Compared with the heat distribution H9 in the first lens combined with the cover, Figure 15a The heat distribution G5 within the first lens combined with the cover shown is improved. Consequently, stress in the effective diameter direction can be minimized by inner barrel 200, and stress in the optical axis direction can be minimized by the constraints of aluminum lens barrel 400 and cover 500, thereby reducing performance variations due to temperature changes. The combined structure of inner barrel 200, lens barrel 400, and cover 500 can suppress the variation F1 of first lens 101 on the object side at first point Z1 to 50 μm or less, and the variation F2 of last lens 109 at second point Z2 to 20 μm or less. In other words, the variation in the BFL can be suppressed to 20 μm or less, thereby reducing decentration problems in the optical system and the impact on resolution.

[0133] Figure 16 1 is an example of a top view of a vehicle to which a camera module according to an embodiment of the present invention is applied. Figure 16 According to an embodiment of the present invention, a vehicle camera system includes an image generation unit 11, a first information generation unit 12, second information generation units 21, 22, 23, 24, and 26, and a control unit 14. The image generation unit 11 may include at least one camera module 20 disposed in the vehicle and may capture images of the vehicle's front and / or the driver to generate a vehicle front image or interior image. The image generation unit 11 may use the camera module 20 to generate images of the vehicle's front and surrounding areas. The front and surrounding images may be digital images and may include color, black and white, and infrared images. Furthermore, the front and surrounding images may include still and moving images. The image generation unit 11 provides the driver image, the front image, and the surrounding images to the control unit 14. The first information generation unit 12 may include at least one radar and / or camera disposed in the vehicle and detect the vehicle's front to generate first detection information. Specifically, the first information generation unit 12 is disposed in the vehicle and detects the position and speed of vehicles in front of the vehicle, the presence and position of pedestrians, and other information to generate the first detection information.

[0134] Using the first detection information generated by the first information generating unit 12, the distance between the vehicle and the vehicle in front can be controlled to remain at a constant level, and the stability of the vehicle operation can be increased in pre-set specific situations (for example, when the driver wants to change the vehicle's driving lane or when reversing to park). The first information generating unit 12 provides the first detection information to the control unit 14. Next, the second information generating units 21, 22, 23, 24 and 26 detect each side of the vehicle based on the front image generated by the image generating unit 11 and the first detection information generated by the first information generating unit 12 to generate second detection information. Specifically, the second information generating units 21, 22, 23, 24 and 26 may include at least one radar and / or camera device provided on the vehicle, and may detect the position and speed of the vehicle located to the side of the vehicle or capture an image. Here, the second information generating units 21, 22, 23, 24 and 26 may be provided at the front, side mirror and rear of the vehicle, respectively. The vehicle camera system can be equipped with the following camera modules, and can provide or process information obtained through the front, rear, each side or corner area of ​​the vehicle to the user to achieve autonomous driving or protect the vehicle and objects from surrounding safety. The optical system of the camera module according to the embodiment of the present invention can be installed in multiple units of a vehicle for safety adjustment, enhancing autonomous driving functions and increasing convenience. In addition, the optical system of the camera module is applied to the vehicle as a component for control of systems such as lane keeping assist systems (LKAS), lane departure warning systems (LDWS) and driver monitoring systems (DMS). Such a vehicle camera module can achieve stable optical performance even when the ambient temperature changes, and can provide a module with competitive price, thereby ensuring the reliability of vehicle components.

[0135] The features, structures, effects, etc. described in the above embodiments are included in at least one embodiment of the present invention and are not necessarily limited to one embodiment. In addition, the features, structures, and effects shown in each embodiment can be combined or modified by a person skilled in the art in the field to which each embodiment belongs relative to other embodiments. Therefore, the contents related to these combinations and variations should be interpreted as being included within the scope of the present invention. In addition, although described based on the embodiments, this is merely an example, the present invention is not limited, and it will be apparent to those skilled in the art that various modifications and applications not shown above are possible without departing from the basic features of the embodiments. For example, each component specifically shown in the embodiments can be modified and implemented. And the differences associated with these modifications and applications should be interpreted as being included within the scope of the present invention as defined in the appended claims.

Claims

1. A camera module, comprising: a lens barrel extending from the object side toward the sensor side; an inner barrel that penetrates from the object side toward the sensor side and is provided on an inner circumference of the lens barrel; a lens portion having a plurality of lenses disposed inside the inner barrel; as well as a spacer arranged on a periphery of at least one of the regions between adjacent lenses, wherein the inner barrel is arranged between the plurality of lenses and the lens barrel, and The inner lens barrel is disposed outside a first lens closest to the subject among the plurality of lenses and outside a last lens closest to the image sensor.

2. The camera module according to claim 1, in, The plurality of lenses include plastic lenses and glass lenses, wherein the spacer includes a guide protrusion on at least one of the object side and the sensor side of the spacer, Here, a flange portion of a lens disposed on the object side or the sensor side of the spacer among the lenses includes a guide groove, and the guide protrusion is inserted into the guide groove.

3. The camera module according to claim 2, in, The outer surface of the guide protrusion has an inclined surface, Wherein, the outer surface of the guide groove has an inclined surface.

4. The camera module according to claim 3, in, An inclination angle of the inclined surface is in a range of 30 to 60 degrees with respect to an optical axis of the lens.

5. The camera module according to claim 4, in, The guide protrusion has a protrusion height in the range of 10 μm to 100 μm.

6. The camera module according to any one of claims 1 to 4, in, The plurality of lenses include a plurality of plastic lenses and a plurality of glass lenses, Wherein, the spacer is provided in plurality, Among the plurality of spacers, a plurality of spacers provided between flange portions of adjacent plastic lenses have a guide protrusion on each of the object side and the sensor side.

7. The camera module according to any one of claims 2 to 5, in, The lens having the guide groove is made of plastic.

8. The camera module according to any one of claims 1 to 5, in, The inner lens barrel is made of plastic. Wherein, the spacer and the lens barrel of the camera module are made of metal.

9. The camera module according to any one of claims 1 to 5, in, The number of plastic lenses in the lens portion is greater than the number of glass lenses, The number of the spacers in the inner barrel is equal to or smaller than the number of the plastic lenses.

10. A camera module, comprising: a lens barrel extending from the object side toward the sensor side; wherein the inner barrel penetrates from the object side toward the sensor side and is disposed around the inner circumference of the lens barrel; a lens portion having a plurality of lenses disposed inside the inner barrel and aligned with the optical axis; a plurality of spacers disposed around at least one of the regions between adjacent lenses, Wherein, the inner barrel is arranged between the plurality of lenses and the lens barrel, Wherein, the plurality of lenses include a plurality of plastic lenses and a plurality of glass lenses, wherein the plurality of spacers include guide protrusions on at least one of the object side and the sensor side, wherein a lens disposed on the object side or the sensor side of each of the plurality of spacers among the lenses includes a guide groove into which the guide protrusion is inserted, Wherein, at least a portion of the outer surface of the inner barrel contacts the inner surface of the lens barrel.

11. The camera module according to claim 10, in, The inner lens barrel is disposed on an outer surface of a first lens closest to a subject among the plurality of lenses and is disposed on an outer surface of a last lens closest to an image sensor.

12. The camera module according to claim 10, in, The inner barrel and the lens having the guide groove are made of plastic material, Wherein, the lens barrel and the spacer are made of metal material.

13. The camera module according to claim 10, in, The first lens is made of glass, wherein the last lens is made of plastic, and Wherein, the bottom of the inner barrel is positioned between the last lens and the lens barrel.

14. The camera module according to any one of claims 10 to 13, in, The lens barrel includes: a head portion provided outside the first lens, an extension portion extending inward from the head portion, a center portion extending from the extension portion in the optical axis direction, and a bottom support portion provided at a lower end portion of the center portion and supporting the inner barrel. The inner lens barrel includes: an inner head portion provided between the outer side of the first lens and the head portion, an inner extension portion extending inwardly from the inner head portion, an inner center portion extending from the inner extension portion in the optical axis direction, and an inner bottom portion provided at the lower end of the inner center portion and supporting the flange portion of the last lens, and Wherein, the plurality of spacers are arranged on the inner surface of the inner central portion.

15. The camera module according to any one of claims 10 to 13, comprising: a cover extending from the periphery of the object-side surface of the flange portion of the first lens to the outside of the lens barrel, The maximum length of the lens barrel in the direction of the optical axis is D1, and the maximum length of the inner barrel is Dc, and Among them, the following conditions are met: 0.7 <Dc / D1<1。

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