Image forming apparatus

Abstract

The utility model relates to an image forming apparatus. An imaging apparatus includes a first lens assembly including a plurality of first lens modules and a single first image sensor, and a second lens assembly including a plurality of second lens modules and a single second image sensor, where the first lens assembly and the second lens assembly are arranged adjacent to each other, a field of view of each of the plurality of first lens modules is wider than a field of view of each of the plurality of second lens modules, and wherein f35t / f35w > = 2 is satisfied, where f35t is a 35 mm equivalent focal length of the second lens modules, and f35w is a 35 mm equivalent focal length of the first lens modules.

Description

[0001] Cross - reference to related applications

[0002] This application claims priority to Korean Patent Application No. 10 - 2023 - 0112972, filed on August 28, 2023, with the Korean Intellectual Property Office, the entire disclosure of which is incorporated herein by reference for all purposes. Technical Field

[0003] The present disclosure relates to an imaging device. Background Art

[0004] Imaging devices have been used in portable electronic devices, such as smart phones, tablet PCs, and laptop computers. Imaging devices generally include a plurality of lenses and an image sensor.

[0005] To capture high - resolution images or videos, the number of pixels in the image sensor can be increased, and the size of the image sensor itself can also be increased. In addition, the number of lenses can be increased.

[0006] Since the size of the imaging device mounted on a portable electronic device may be affected by the size of the portable electronic device, it may be desirable to design an imaging device that supports high resolution while having a short total track length.

[0007] However, due to the size limitations of portable electronic devices, there are physical limitations in designing an imaging device that supports high resolution while having a short total track length.

[0008] The above information is presented as background information only to assist in understanding the present disclosure. No determination has been made, and no assertion is made as to whether any of the above constitutes prior art with respect to the present disclosure. Summary of the Utility Model

[0009] The present summary is provided to introduce a selection of concepts in a simplified form, which are further described below in the detailed description. The present summary is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used to help determine the scope of the claimed subject matter.

[0010] In one general aspect, an imaging device includes a first lens assembly and a second lens assembly. The first lens assembly includes a plurality of first lens modules and a single first image sensor, and the second lens assembly includes a plurality of second lens modules and a single second image sensor. The first lens assembly and the second lens assembly are arranged adjacent to each other. The field of view of each first lens module among the plurality of first lens modules is wider than the field of view of each second lens module among the plurality of second lens modules, and f35t / f35w≥2 is satisfied. Here, f35t is the 35mm equivalent focal length of the second lens module, and f35w is the 35mm equivalent focal length of the first lens module.

[0011] TTL_w / IMG HT_Fw<0.85 can be satisfied, where TTL_w is the distance on the optical axis from the object side surface of the front lens of the first lens module to the imaging surface of the single first image sensor, and IMG HT_Fw is half of the diagonal length of the imaging surface of the single first image sensor. The front lens is the lens closest to the object side.

[0012] Fno_w>fw / IMG HT_Aw can be satisfied, where Fno_w is the F-number of the first lens module, fw is the total focal length of the first lens module, and IMG HT_Aw is half of the diagonal length of the area of the imaging surface of the single first image sensor, and the imaging surface is divided corresponding to the plurality of first lens modules.

[0013] TTL_t / IMG HT_Ft<1.45 can be satisfied, where TTL_t is the distance on the optical axis from the object side surface of the front lens of the second lens module to the imaging surface of the single second image sensor, and IMG HT_Ft is half of the diagonal length of the imaging surface of the single second image sensor. The front lens is the lens closest to the object side.

[0014] Fno_t>(ft / IMG HT_At)×0.9 can be satisfied, where Fno_t is the F-number of the second lens module, ft is the total focal length of the second lens module, and IMG HT_At is half of the diagonal length of the area of the imaging surface of the single second image sensor, and the imaging surface is divided corresponding to the plurality of second lens modules.

[0015] The first lens assembly may include a plurality of wide-angle lens arrays arranged in sequence from the object side to the image side. The plurality of wide-angle lens arrays may each include a plurality of lenses, and the first lens module may include a plurality of lenses arranged in different wide-angle lens arrays and sharing a single optical axis.

[0016] The second lens assembly may include a plurality of telephoto lens arrays arranged in sequence from the object side to the image side. The plurality of telephoto lens arrays may each include a plurality of lenses, and the second lens module may include a plurality of lenses arranged in different telephoto lens arrays and sharing a single optical axis.

[0017] The first lens module may include a first lens, a second lens, a third lens, a fourth lens, and a fifth lens arranged along the optical axis from the object side toward the image side. The first lens may have a positive refractive power, and the second lens may have a negative refractive power.

[0018] The absolute value of the difference in Abbe number between the first lens and the second lens may be greater than 30 and less than 50.

[0019] The second lens may have a refractive index greater than 1.67 and an Abbe number less than 21.

[0020] The third lens may have a positive refractive power, and the fourth lens may have a negative refractive power.

[0021] The second lens module may include a first lens, a second lens, a third lens, a fourth lens, and a fifth lens arranged along the optical axis from the object side toward the image side. The first lens may have a positive refractive power, and the second lens may have a negative refractive power.

[0022] The absolute value of the difference in Abbe number between the first lens and the second lens may be greater than 30 and less than 50, and the absolute value of the difference in Abbe number between the second lens and the third lens may be greater than 10 and less than 20.

[0023] The second lens may have a refractive index greater than 1.64 and an Abbe number less than 24.

[0024] The fourth lens may have a positive refractive power, and the fifth lens may have a negative refractive power.

[0025] A plurality of first lens modules may all have substantially the same configuration as each other.

[0026] A plurality of second lens modules may all have substantially the same configuration as each other.

[0027] In another general aspect, an imaging device includes a first lens assembly and a second lens assembly. The first lens assembly includes a plurality of first lens modules having substantially the same configuration as each other and a single first image sensor. The second lens assembly is disposed adjacent to the first lens assembly, and the second lens assembly includes a plurality of second lens modules having substantially the same configuration as each other and a single second image sensor. Wherein, the field of view of each first lens module among the plurality of first lens modules is wider than the field of view of each second lens module among the plurality of second lens modules, and wherein, TTL_w / IMG HT_Fw < 0.85 is satisfied, where TTL_w is the distance on the optical axis from the object side surface of the front lens of the first lens module to the imaging surface of the single first image sensor, and IMG HT_Fw is half of the diagonal length of the imaging surface of the single first image sensor, and wherein the front lens is the lens closest to the object side.

[0028] It is possible to satisfy f35t / f35w ≥ 2, where f35t is the 35mm equivalent focal length of the second lens module, and f35w is the 35mm equivalent focal length of the first lens module.

[0029] The optical axes of the plurality of first lens modules may be substantially parallel to each other, and the optical axes of the plurality of second lens modules may be substantially parallel to each other.

[0030] Other features and aspects will be apparent from the following detailed description, the drawings, and the claims. Description of the Drawings

[0031] Figure 1 is a diagram showing a schematic structure of an imaging device according to an exemplary embodiment of the present disclosure.

[0032] Figure 2 is a plan view of an imaging device according to an exemplary embodiment of the present disclosure.

[0033] Figure 3 is a diagram showing a schematic structure of an imaging device according to another exemplary embodiment of the present disclosure.

[0034] Figure 4 is a schematic exploded view of an imaging device according to another exemplary embodiment of the present disclosure.

[0035] Figure 5 is a schematic plan view of the first image sensor and the second image sensor.

[0036] Figure 6 is a reference diagram showing a method of generating an image using an imaging device according to an exemplary embodiment of the present disclosure.

[0037] Figure 7It is a configuration diagram of the first lens module of the first lens assembly.

[0038] Figure 8 It shows Figure 7 a diagram of the aberration characteristics of the first lens module shown in

[0039] Figure 9 It is a configuration diagram of the second lens module of the second lens assembly.

[0040] Figure 10 It shows Figure 9 a diagram of the aberration characteristics of the second lens module shown in

[0041] Throughout the drawings and the detailed description, unless otherwise described, the same reference numerals refer to the same elements. For clarity, illustration, and convenience, the drawings may not be drawn to scale, and the relative dimensions, proportions, and depictions of the elements in the drawings may be exaggerated. Detailed Description

[0042] Hereinafter, although examples of the present disclosure will be described in detail with reference to the drawings, it should be noted that the examples are not limited thereto.

[0043] The following detailed description is provided to assist the reader in obtaining a comprehensive understanding of the methods, apparatuses, and / or systems described herein. However, various changes, modifications, and equivalents of the methods, apparatuses, and / or systems described herein will be apparent after understanding the present disclosure. For example, the order of operations described herein is merely an example and is not limited to the order set forth herein, but rather can be changed as will be apparent after understanding the present disclosure, except for operations that must occur in a certain order. In addition, descriptions of features known in the art may be omitted for increased clarity and conciseness.

[0044] The features described herein may be implemented in different forms and will not be construed as limited to the examples described herein. Instead, the examples described herein are provided only to illustrate some of the many possible ways of implementing the methods, apparatuses, and / or systems described herein that will be apparent after understanding the present disclosure.

[0045] Throughout the specification, when an element (such as a layer, region, or substrate) is described as being "on," "connected to," or "coupled to" another element, it may be directly "on," directly "connected to," or directly "coupled to" the other element, or there may be one or more other elements therebetween. In contrast, when an element is described as being "directly" "on," "directly connected to," or "directly coupled to" another element, there are no other elements therebetween.

[0046] As used herein, the term "and / or" includes any one of the associated listed items and any combination of any two or more of the associated listed items; likewise, "at least one of..." includes any one of the associated listed items and any combination of any two or more of the associated listed items.

[0047] Although terms such as "first", "second", and "third" may be used herein to describe various components, assemblies, regions, layers, or parts, these components, assemblies, regions, layers, or parts are not limited by these terms. Instead, these terms are only used to distinguish one component, assembly, region, layer, or part from another. Thus, the first component, first assembly, first region, first layer, or first part mentioned in the examples described herein may also be referred to as the second component, second assembly, second region, second layer, or second part without departing from the teachings of the examples.

[0048] For ease of description, spatial relative terms such as "above", "upper", "below", "lower", etc. may be used herein to describe the relationship between one element and another as shown in the figures. Such spatial relative terms are intended to also include different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is flipped, an element described as "above" or "upper" relative to another element will then be "below" or "lower" relative to the said another element. Thus, the term "above" includes both the above and below orientations, depending on the spatial orientation of the device. The device may also be oriented in other ways (e.g., rotated 90 degrees or in other orientations), and the spatial relative terms used herein will be interpreted accordingly.

[0049] The terms used herein are only for describing various examples and are not intended to limit the disclosure. The phrases "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprising", "including", and "having" specify the presence of the stated features, quantities, operations, components, elements, and / or combinations thereof, but do not preclude the presence or addition of one or more other features, quantities, operations, components, elements, and / or combinations thereof.

[0050] Due to manufacturing techniques and / or tolerances, the shapes shown in the figures may vary. Thus, the examples described herein are not limited to the specific shapes shown in the figures, but include shape variations that occur during manufacturing.

[0051] In this document, it should be noted that the term "may" is used with respect to examples, e.g., with respect to what an example may include or implement, meaning that there is at least one example that includes or implements this feature, and not all examples are limited thereto.

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

[0053] One aspect of the present disclosure may provide a thin imaging device capable of capturing high-resolution images and videos.

[0054] Figure 1 is a diagram showing a schematic structure of an imaging device according to an exemplary embodiment of the present disclosure, and Figure 2 is a plan view of an imaging device according to an exemplary embodiment of the present disclosure.

[0055] Figure 3 is a diagram showing a schematic structure of an imaging device according to another exemplary embodiment of the present disclosure, and Figure 4 is a schematic exploded view of an imaging device according to another exemplary embodiment of the present disclosure.

[0056] Figure 5 is a schematic plan view of a first image sensor and a second image sensor.

[0057] Figure 6 is a reference diagram showing a method of generating an image using an imaging device according to an exemplary embodiment of the present disclosure.

[0058] An imaging device according to an exemplary embodiment of the present disclosure may be installed on a portable electronic device, such as a mobile communication terminal, a smart phone, and a tablet PC.

[0059] Referring to Figure 1 and Figure 2 , an imaging device according to an exemplary embodiment of the present disclosure includes a plurality of lens assemblies.

[0060] In an exemplary embodiment, the imaging device includes a first lens assembly 10 and a second lens assembly 20 that are disposed adjacent to each other. Hereinafter, for ease of description, the plurality of lens assemblies are described as including the first lens assembly 10 and the second lens assembly 20, but the number of lens assemblies may vary according to need.

[0061] The first lens assembly 10 includes a plurality of first lens modules having the same configuration, and the second lens assembly 20 includes a plurality of second lens modules having the same configuration.

[0062] The field of view of each lens module included in the first lens assembly 10 may be wider than the field of view of each lens module included in the second lens assembly 20.

[0063] For example, each lens module included in the first lens assembly 10 may be a wide-angle lens module, and each lens module included in the second lens assembly 20 may be a telephoto lens module.

[0064] When imaging an object using the first lens assembly 10, each lens module of the first lens assembly 10 images the same object, and the captured images can be synthesized to generate a single complete image with a higher resolution than that of the individual images.

[0065] In addition, in the case of imaging an object using the second lens assembly 20, each lens module of the second lens assembly 20 can image the same object, and the captured images can be synthesized to generate a single complete image with a higher resolution than that of the individual images.

[0066] In the case of the wide-angle lens assembly and the telephoto lens assembly of the prior art, there are physical limitations in designing them to have a high resolution and a short total track length.

[0067] Therefore, in the imaging device according to an exemplary embodiment of the present disclosure, a plurality of lens assemblies each include a plurality of lens modules, and the images captured by the corresponding lens modules can be synthesized to generate a single image with a high resolution, so that the imaging device can have a high resolution and a short total track length.

[0068] In addition, since the field of view of each lens module included in the first lens assembly 10 is wider than the field of view of each lens module included in the second lens assembly 20, the imaging device can implement a zoom function within a predetermined magnification range.

[0069] In an exemplary embodiment, the imaging device may satisfy the following conditional expression 1.

[0070] [Conditional Expression 1] f35t / f35w ≥ 2

[0071] In Conditional Expression 1, f35t is the 35 mm equivalent focal length of the second lens module included in the second lens assembly 20, and f35w is the 35 mm equivalent focal length of the first lens module included in the first lens assembly 10.

[0072] 1. First lens assembly

[0073] Referring to Figure 1 , the first lens assembly 10 includes a plurality of wide-angle lens arrays 11 to 15 arranged in order from the object side toward the image side and a first image sensor 16.

[0074] Multiple wide-angle lens arrays 11 to 15 may be arranged in different layers. The multiple wide-angle lens arrays 11 to 15 each include a plurality of lenses.

[0075] For example, one lens array includes a plurality of lenses arranged in the same layer.

[0076] In one lens array, the plurality of lenses may be arranged in an n×n matrix structure or an n×m matrix structure, where n and m are each different natural numbers of 2 or greater.

[0077] The first lens assembly 10 includes a plurality of optical axes. For example, when the plurality of lenses in each lens array are arranged in a 2×2 matrix structure, the first lens assembly 10 includes four optical axes. The plurality of optical axes may be arranged parallel to each other.

[0078] A plurality of lenses sharing a single optical axis may form a lens module.

[0079] The plurality of lenses sharing a single optical axis may be lenses arranged in different lens arrays.

[0080] When the plurality of lenses in each lens array are arranged in a 2×2 matrix structure, the first lens assembly 10 includes four first lens modules 1a to 1d.

[0081] In each of the first lens modules 1a to 1d, the ratio (TTL_w / (2×IMG HT_Fw)) of the distance (TTL_w) from the object side surface of the lens closest to the object side on the optical axis to the diagonal length (2×IMG HT_Fw) of the imaging surface (effective imaging area) may be less than 0.4.

[0082] The plurality of first lens modules 1a to 1d may be arranged adjacent to each other.

[0083] The first lens assembly 10 includes a plurality of first lens modules 1a to 1d and a first image sensor 16.

[0084] Here, the first image sensor 16 is provided as a single sensor. That is, the first lens assembly 10 does not include a plurality of image sensors corresponding to the plurality of first lens modules 1a to 1d respectively, but includes a single first image sensor 16.

[0085] The plurality of first lens modules 1a to 1d may image an object by dividing the effective imaging area of the single first image sensor 16 respectively.

[0086] For example, referring to Figure 6 , an imaging device according to an exemplary embodiment of the present disclosure may synthesize low-resolution images I1 to I4 captured by the plurality of first lens modules 1a to 1d to generate a single high-resolution image.

[0087] That is, each of the first lens modules can image the same object and synthesize the captured images to generate a single complete image having a higher resolution than the resolution of the individual images.

[0088] In Figure 1 and Figure 2 for ease of description, an exemplary embodiment is shown in which a plurality of lenses are arranged in a 2×2 matrix structure in each lens array of the first lens assembly 10 (i.e., four first lens modules are arranged).

[0089] The first lens assembly 10 may include five lens arrays arranged in order from the object side to the image side. For example, the first lens assembly 10 may include a first wide-angle lens array 11, a second wide-angle lens array 12, a third wide-angle lens array 13, a fourth wide-angle lens array 14, and a fifth wide-angle lens array 15.

[0090] Thus, one lens module may include five lenses.

[0091] On the other hand, referring to Figure 3 and Figure 4 , different from the exemplary embodiment of Figure 1 , a plurality of lenses are not provided in each of the plurality of lens arrays, but a plurality of individually manufactured first lens modules 1a to 1d may be arranged adjacent to each other on one first image sensor 16.

[0092] Although only the first lens assembly 10 is shown in Figure 3 and Figure 4 , the second lens assembly 20 may also be configured to have a configuration similar to the configuration of the first lens assembly 10.

[0093] On the other hand, referring to Figure 4 , the first lens assembly 10 may further include a single lens holder 17 that houses a plurality of first lens modules. In addition, each of the plurality of first lens modules may include a lens barrel in which a plurality of lenses are provided.

[0094] In the exemplary embodiment, the first lens assembly 10 may satisfy at least one of the following conditional expressions 2 and conditional expression 3.

[0095] [Conditional expression 2] TTL_w / IMG HT_Fw < 0.85

[0096] [Conditional expression 3] Fno_w > fw / IMG HT_Aw

[0097] In conditional expression 2, TTL_w is the distance on the optical axis from the object side surface of the front lens (the lens disposed closest to the object side) of the first lens module to the imaging surface of the single first image sensor 16, and IMG HT_Fw is half of the diagonal length of the imaging surface of the single first image sensor 16.

[0098] In conditional expression 3, Fno_w is the F-number of the first lens module, fw is the total focal length of the first lens module, and IMG HT_Aw is half of the diagonal length of the area of the imaging surface of the single first image sensor 16, which is divided corresponding to a plurality of first lens modules. In the case of a 2×2 matrix structure, IMG HT_Aw can be half of IMG HT_Fw.

[0099] Figure 7 is a configuration diagram of the first lens module of the first lens assembly, and Figure 8 is a diagram showing Figure 7 the aberration characteristics of the first lens module shown in

[0100] Referring to Figure 7 and Figure 8 the first lens module described can be any one of the plurality of first lens modules of the first lens assembly 10. In addition, the plurality of first lens modules can all have the same configuration.

[0101] In this specification, the object side surface of each lens refers to the surface close to the object side, and the image side surface refers to the surface close to the image side. In addition, the values of the radius of curvature, thickness, distance, and focal length of the lens are in mm, and the unit of the field of view (FOV) is degree.

[0102] In addition, in the description of the shape of each lens, the fact that one surface is convex means that the paraxial region of the corresponding surface is convex, and the fact that one surface is concave means that the paraxial region of the corresponding surface is concave. Therefore, the fact that one surface of a lens is convex means that it is convex in the paraxial region.

[0103] On the other hand, the paraxial region refers to a very narrow region near the optical axis and including the optical axis.

[0104] The imaging surface can refer to the virtual plane on which the first lens module forms a focal point. Alternatively, the imaging surface can refer to the light-receiving surface of the first image sensor.

[0105] In an exemplary embodiment, the first lens module includes five lenses.

[0106] For example, referring to Figure 7, the first lens module includes a first lens 110, a second lens 120, a third lens 130, a fourth lens 140, and a fifth lens 150 arranged along the optical axis from the object side toward the image side. The first lens 110 to the fifth lens 150 are arranged at a predetermined distance from each other along the optical axis.

[0107] The first lens 110 to the fifth lens 150 may be lenses arranged in different lens arrays.

[0108] The first lens module may further include an infrared cut-off filter 160 (hereinafter referred to as "filter") to block infrared rays. The filter 160 is disposed between the fifth lens 150 and the imaging surface 170.

[0109] In addition, the first lens module may further include an aperture for controlling the amount of light.

[0110] The aperture may be disposed between the second lens 120 and the third lens 130.

[0111] The first lens 110 to the fifth lens 150 may be formed of plastic.

[0112] In addition, the first lens 110 to the fifth lens 150 may each be formed of a plastic material having optical properties (refractive index, Abbe number, etc.) different from those of the lenses disposed adjacent to each other.

[0113] In an exemplary embodiment, the absolute value of the difference in Abbe number between the first lens 110 and the second lens 120 may exceed 30. In addition, the absolute value of the difference in Abbe number between the second lens 120 and the third lens 130 may exceed 30.

[0114] In an exemplary embodiment, the second lens 120 may be formed of a plastic material having a high refractive index and a low dispersion value. For example, the refractive index of the second lens 120 may be greater than 1.67, and its Abbe number may be less than 21.

[0115] In an exemplary embodiment, the fourth lens 140 may be formed of a plastic material having a high refractive index and a low dispersion value. For example, the refractive index of the fourth lens 140 may be greater than 1.67, and its Abbe number may be less than 21.

[0116] In an exemplary embodiment, the first lens module may satisfy the conditional expression: 30 < |v1 - v2| < 50, where v1 is the Abbe number of the first lens 110, and v2 is the Abbe number of the second lens 120.

[0117] In an exemplary embodiment, the first lens module may satisfy the conditional expression: 30 < |v2 - v3| < 50, where v2 is the Abbe number of the second lens 120, and v3 is the Abbe number of the third lens 130.

[0118] The plurality of lenses constituting the first lens module may have aspherical surfaces. For example, each of the plurality of lenses may have at least one aspherical surface.

[0119] The first lens module according to an exemplary embodiment of the present disclosure may form a focal point on the imaging surface 170. The imaging surface 170 may refer to a plane on which the first lens module forms a focal point. As an example, the imaging surface 170 may refer to a surface of the first image sensor that receives light.

[0120] The lens characteristics (radius of curvature, thickness of the lens or distance between lenses, refractive index, Abbe number) of each lens are listed in Table 1.

[0121] Table 1

[0122] Surface number Mark Radius of curvature Thickness or distance Refractive index Abbe number S1 First lens 1.545 0.661 1.551 55.99 S2 242.804 0.030 S3 Second lens 3.319 0.219 1.684 20.38 S4 1.737 0.217 S5 Aperture Infinity 0.133 S6 Third lens -11.891 0.462 1.551 55.99 S7 -5.956 0.512 S8 Fourth lens 24.898 0.453 1.684 20.38 S9 8.209 0.109 S10 Fifth lens 1.230 0.537 1.542 55.74 S11 1.125 0.216 S12 Filter Infinity 0.110 1.522 64.20 S13 Infinity 0.664 S14 Imaging surface Infinity

[0123] In an exemplary embodiment, the total focal length fw of the first lens module is 3.337 mm (the 35 mm equivalent focal length is 25 mm), Fno_w is 1.9, and IMG HT_Fw is 6.016 mm.

[0124] In an exemplary embodiment, the first lens 110 has a positive refractive power, the object side of the first lens 110 is convex, and the image side of the first lens 110 is concave.

[0125] The second lens 120 has a negative refractive power, the object side of the second lens 120 is convex, and the image side of the second lens 120 is concave.

[0126] The third lens 130 has a positive refractive power, the object side of the third lens 130 is concave, and the image side of the third lens 130 is convex.

[0127] The fourth lens 140 has a negative refractive power, the object side of the fourth lens 140 is convex, and the image side of the fourth lens 140 is concave.

[0128] In addition, the fourth lens 140 has at least one anastigmatic point formed on at least one of the object side and the image side. For example, the object side of the fourth lens 140 may be convex in the paraxial region and concave in a portion other than the paraxial region.

[0129] The fifth lens 150 has a positive refractive power, the object side of the fifth lens 150 is convex, and the image side of the fifth lens 150 is concave.

[0130] In addition, at least one inflection point is formed on at least one of the object side and the image side of the fifth lens 150. For example, the object side of the fifth lens 150 may be convex in the paraxial region and concave in the portion other than the paraxial region.

[0131] An inflection point refers to a point where the surface of the lens changes from concave to convex or from convex to concave.

[0132] On the other hand, both the object side and the image side of the first lens 110 to the fifth lens 150 are aspherical surfaces.

[0133] In addition, the first lens module configured in this way can have Figure 8 the aberration characteristics shown in

[0134] 2. Second lens assembly

[0135] The second lens assembly 20 includes a plurality of telephoto lens arrays 21 to 25 arranged in order from the object side to the image side and a second image sensor 26.

[0136] The plurality of telephoto lens arrays 21 to 25 may be arranged in different layers. The plurality of telephoto lens arrays 21 to 25 each include a plurality of lenses.

[0137] For example, one lens array includes a plurality of lenses arranged in the same layer.

[0138] In one lens array, the plurality of lenses may be arranged in an n×n matrix structure or an n×m matrix structure, where n and m are each different natural numbers of 2 or more.

[0139] The second lens assembly 20 includes a plurality of optical axes. For example, when the plurality of lenses are arranged in a 2×2 matrix structure in each lens array, the second lens assembly 20 includes four optical axes. The plurality of optical axes may be arranged parallel to each other.

[0140] A plurality of lenses sharing a single optical axis may constitute one lens module.

[0141] A plurality of lenses sharing a single optical axis may be lenses arranged in different lens arrays.

[0142] When the plurality of lenses are arranged in a 2×2 matrix structure in each lens array, the second lens assembly 20 includes four second lens modules 2a to 2d.

[0143] In each of the second lens modules 2a to 2d, the ratio (TTL_t / (2×IMG HT_Ft)) of the distance (TTL_t) from the object side surface of the lens set closest to the object side on the optical axis to the second image sensor 26 to the diagonal length (2×IMG HT_Ft) of the imaging surface (effective imaging area) may be less than 0.7.

[0144] The plurality of second lens modules 2a to 2d may be arranged adjacent to each other.

[0145] The second lens assembly 20 includes a plurality of second lens modules 2a to 2d and a second image sensor 26.

[0146] Here, the second image sensor 26 is provided as a single sensor. That is, the second lens assembly 20 does not include a plurality of image sensors corresponding to the plurality of second lens modules 2a to 2d respectively, but includes a single second image sensor 26.

[0147] The plurality of second lens modules 2a to 2d may image an object by dividing the effective imaging area of the single second image sensor 26 respectively.

[0148] For example, referring to Figure 6 , an imaging device according to an exemplary embodiment of the present disclosure may synthesize the low-resolution images I1 to I4 captured by the plurality of second lens modules 2a to 2d to generate a single high-resolution image.

[0149] That is, each of the second lens modules 2a to 2d may image the same object and synthesize the captured images to generate a single complete image having a resolution higher than the resolution of the individual images.

[0150] In Figure 1 and Figure 2 , for ease of description, an exemplary embodiment is shown in which a plurality of lenses (i.e., four second lens modules) in a 2×2 matrix structure are arranged in each lens array of the second lens assembly 20.

[0151] The second lens assembly 20 may include five lens arrays arranged in order from the object side to the image side. For example, the second lens assembly 20 may include a first telephoto lens array 21, a second telephoto lens array 22, a third telephoto lens array 23, a fourth telephoto lens array 24, and a fifth telephoto lens array 25.

[0152] Therefore, one lens module may include five lenses.

[0153] In an exemplary embodiment, the second lens assembly 20 may satisfy at least one of the following conditional expressions 4 and conditional expression 5.

[0154] [Conditional Expression 4] TTL_t / IMG HT_Ft < 1.45

[0155] [Conditional Expression 5] Fno_t > (ft / IMG HT_At) × 0.9

[0156] In Conditional Expression 4, TTL_t is the distance on the optical axis from the object side surface of the front lens (the lens set closest to the object side) of the second lens module to the imaging surface of the single second image sensor 26, and IMG HT_Ft is half of the diagonal length of the imaging surface of the single second image sensor 26.

[0157] In Conditional Expression 5, Fno_t is the F-number of the second lens module, ft is the total focal length of the second lens module, and IMG HT_At is half of the diagonal length of the area of the imaging surface of the single second image sensor 26, where the imaging surface is divided corresponding to a plurality of second lens modules. In the case of a 2×2 matrix structure, IMG HT_At can be half of IMG HT_Ft.

[0158] Figure 9 is a configuration diagram of the second lens module of the second lens assembly, and Figure 10 is a diagram showing Figure 9 the aberration characteristics of the second lens module shown in

[0159] Referring to Figure 9 and Figure 10 The second lens module described can be any one of the plurality of second lens modules of the second lens assembly 20. In addition, the plurality of second lens modules can all have the same configuration.

[0160] The imaging surface can refer to the virtual plane on which the second lens module forms a focus. Alternatively, the imaging surface can refer to the light-receiving surface of the second image sensor.

[0161] In an exemplary embodiment, the second lens module includes five lenses.

[0162] For example, referring to Figure 9 , the second lens module includes a first lens 210, a second lens 220, a third lens 230, a fourth lens 240, and a fifth lens 250 arranged along the optical axis from the object side toward the image side. The first lens 210 to the fifth lens 250 are arranged at a predetermined distance from each other along the optical axis.

[0163] The first lens 210 to the fifth lens 250 can be lenses arranged in different lens arrays.

[0164] The second lens module may further include an infrared cut-off filter 260 (hereinafter referred to as "filter") to block infrared rays. The filter 260 is disposed between the fifth lens 250 and the imaging surface 270.

[0165] In addition, the second lens module may further include an aperture S for controlling the amount of light.

[0166] The aperture S may be disposed between the second lens 220 and the third lens 230.

[0167] The first lens 210 to the fifth lens 250 may be formed of plastic.

[0168] In addition, the first lens 210 to the fifth lens 250 may each be formed of a plastic material having different optical properties (refractive index, Abbe number, etc.) from the lenses disposed adjacent to each other.

[0169] In an exemplary embodiment, the absolute value of the difference in Abbe number between the first lens 210 and the second lens 220 may exceed 30. In addition, the absolute value of the difference in Abbe number between the second lens 220 and the third lens 230 may exceed 10. In addition, the absolute value of the difference in Abbe number between the first lens 210 and the third lens 230 may exceed 15.

[0170] In an exemplary embodiment, the second lens 220 may be formed of a plastic material having a high refractive index and a low dispersion value. For example, the refractive index of the second lens 220 may be greater than 1.64, and its Abbe number may be less than 24.

[0171] In an exemplary embodiment, the fourth lens 240 may be formed of a plastic material having a high refractive index and a low dispersion value. For example, the refractive index of the fourth lens 240 may be greater than 1.67, and its Abbe number may be less than 20.

[0172] In an exemplary embodiment, the refractive index of the third lens 230 may be greater than 1.55, and its Abbe number may be less than 40.

[0173] In an exemplary embodiment, the second lens module may satisfy the conditional expression: 30 < |v1 - v2| < 50, where v1 is the Abbe number of the first lens 210, and v2 is the Abbe number of the second lens 220.

[0174] In an exemplary embodiment, the second lens module may satisfy the conditional expression: 10 < |v2 - v3| < 20, where v2 is the Abbe number of the second lens 220, and v3 is the Abbe number of the third lens 230.

[0175] In an exemplary embodiment, the second lens module may satisfy the conditional expression: 15 < |v1 - v3| < 25, where v1 is the Abbe number of the first lens 210, and v3 is the Abbe number of the third lens 230.

[0176] The plurality of lenses constituting the second lens module may have aspherical surfaces. For example, each of the plurality of lenses may have at least one aspherical surface.

[0177] The second lens module according to an exemplary embodiment of the present disclosure may form a focal point on the imaging surface 270. The imaging surface 270 may refer to a plane on which the second lens module forms a focal point. As an example, the imaging surface 270 may refer to a surface of the second image sensor that receives light.

[0178] Table 2 lists the lens characteristics (curvature radius, thickness of the lens or distance between lenses, refractive index, Abbe number) of each lens.

[0179] Table 2

[0180] Surface number Mark Radius of curvature Thickness or distance Refractive index Abbe number S1 First lens 1.305 0.748 1.549 55.99 S2 -8.997 0.036 S3 Second lens -71.895 0.198 1.653 23.49 S4 1.874 0.178 S5 Aperture Infinity 0.238 S6 Third lens 1.68459 0.221 1.575 37.40 S7 1.826 0.240 S8 Fourth lens -12.684 0.237 1.688 19.24 S9 -5.508 0.803 S10 Fifth lens 112.823 0.198 1.540 55.74 S11 1.544 0.278 S12 Filter Infinity 0.110 1.519 55.15 S13 Infinity 0.778 S14 Imaging surface Infinity

[0181] In an exemplary embodiment, the total focal length ft of the second lens module is 5 mm (the 35 mm equivalent focal length is 62.5 mm), Fno_t is 2.7, and IMG HT_Ft is 3.46 mm.

[0182] In an exemplary embodiment, the first lens 210 has a positive refractive power, and the object side surface and the image side surface of the first lens 210 are convex.

[0183] The second lens 220 has a negative refractive power, and the object side surface and the image side surface of the second lens 220 are concave.

[0184] The third lens 230 has a positive refractive power, the object side surface of the third lens 230 is convex, and the image side surface of the third lens 230 is concave.

[0185] The fourth lens 240 has a positive refractive power, the object side surface of the fourth lens 240 is concave, and the image side surface of the fourth lens 240 is convex.

[0186] The fifth lens 250 has a negative refractive power, the object side surface of the fifth lens 250 is convex, and the image side surface of the fifth lens 250 is concave.

[0187] In addition, at least one inflection point is formed on at least one of the object side surface and the image side surface of the fifth lens 250. For example, the object side surface of the fifth lens 250 may be convex in the paraxial region and concave in a portion other than the paraxial region.

[0188] An inflection point refers to a point on the surface of a lens where the surface changes from concave to convex or from convex to concave.

[0189] On the other hand, both the object side and the image side of the first lens 210 to the fifth lens 250 are aspherical surfaces.

[0190] In addition, the second lens module configured in this way can have Figure 10 the aberration characteristics shown in

[0191] An imaging device according to one or more exemplary embodiments of the present disclosure as described herein can be miniaturized in size while capturing high-resolution images and videos.

[0192] Although specific examples have been shown and described above, it will be apparent after understanding the present disclosure that various changes in form and detail can be made in these examples without departing from the spirit and scope of the claims and their equivalents. The examples described herein are considered to be illustrative only and not for the purpose of limitation. The description of a feature or aspect in each example is considered applicable to similar features or aspects in other examples. Suitable results can also be obtained if the described techniques are performed in a different order and / or if the components in the described system, architecture, device, or circuit are combined in a different way and / or replaced or supplemented by other components or their equivalents. Therefore, the scope of the present disclosure is not defined by the specific embodiments but by the claims and their equivalents, and all changes within the scope of the claims and their equivalents will be construed as being included in the present disclosure.

Claims

1. An imaging device, characterized in that, Comprising: A first lens assembly, including a plurality of first lens modules and a first image sensor; And A second lens assembly, including a plurality of second lens modules and a second image sensor, wherein the first lens assembly and the second lens assembly are arranged adjacent to each other, wherein the field of view of each first lens module among the plurality of first lens modules is wider than the field of view of each second lens module among the plurality of second lens modules, and wherein f35t / f35w≥2 is satisfied, where f35t is the 35mm equivalent focal length of the second lens module, and f35w is the 35mm equivalent focal length of the first lens module.

2. The imaging device according to claim 1, wherein TTL_w / IMG HT_Fw<0.85 is satisfied, where TTL_w is the distance on the optical axis from the object side surface of the front lens of the first lens module to the imaging surface of the first image sensor, and IMG HT_Fw is half of the diagonal length of the imaging surface of the first image sensor, where the front lens is the lens closest to the object side.

3. The imaging device according to claim 1, wherein Fno_w>fw / IMG HT_Aw is satisfied, where Fno_w is the F-number of the first lens module, fw is the total focal length of the first lens module, and IMG HT_Aw is half of the diagonal length of the area of the imaging surface of the first image sensor, and the imaging surface is divided corresponding to the plurality of first lens modules.

4. The imaging device according to claim 1, wherein TTL_t / IMG HT_Ft<1.45 is satisfied, where TTL_t is the distance on the optical axis from the object side surface of the front lens of the second lens module to the imaging surface of the second image sensor, and IMG HT_Ft is half of the diagonal length of the imaging surface of the second image sensor, where the front lens is the lens closest to the object side.

5. The imaging device according to claim 1, wherein Fno_t>(ft / IMG HT_At)×0.9 is satisfied, where Fno_t is the F-number of the second lens module, ft is the total focal length of the second lens module, and IMG HT_At is half of the diagonal length of the area of the imaging surface of the second image sensor, and the imaging surface is divided corresponding to the plurality of second lens modules.

6. The imaging device according to claim 1, wherein: The first lens assembly includes a plurality of wide-angle lens arrays arranged in sequence from the object side to the image side, The plurality of wide-angle lens arrays respectively include a plurality of lenses, and The first lens module includes a plurality of lenses arranged in different wide-angle lens arrays and sharing a single optical axis.

7. The imaging device according to claim 1, wherein: The second lens assembly includes a plurality of telephoto lens arrays arranged in sequence from the object side to the image side, The plurality of telephoto lens arrays respectively include a plurality of lenses, The second lens module includes a plurality of lenses arranged in different telephoto lens arrays and sharing a single optical axis.

8. The imaging device according to claim 1, wherein: The first lens module includes a first lens, a second lens, a third lens, a fourth lens, and a fifth lens arranged along the optical axis from the object side towards the image side, The first lens has a positive refractive power, and the second lens has a negative refractive power.

9. The imaging device according to claim 8, wherein, The absolute value of the difference in Abbe number between the first lens and the second lens is greater than 30 and less than 50.

10. The imaging device according to claim 9, characterized in that, The second lens has a refractive index greater than 1.67 and an Abbe number less than 21.

11. The imaging device according to claim 8, wherein The third lens has a positive refractive power, and the fourth lens has a negative refractive power.

12. The imaging device according to claim 1, wherein: The second lens module includes a first lens, a second lens, a third lens, a fourth lens, and a fifth lens arranged along the optical axis from the object side toward the image side, the first lens has a positive refractive power, and the second lens has a negative refractive power.

13. The imaging device according to claim 12, wherein: the absolute value of the difference in Abbe number between the first lens and the second lens is greater than 30 and less than 50, and the absolute value of the difference in Abbe number between the second lens and the third lens is greater than 10 and less than 20.

14. The imaging device according to claim 13, characterized in that, The second lens has a refractive index greater than 1.64 and an Abbe number less than 24.

15. The imaging device according to claim 12, characterized in that, The fourth lens has a positive refractive power, and the fifth lens has a negative refractive power.

16. The imaging device according to claim 1, characterized in that, All of the plurality of first lens modules have the same configuration as each other.

17. The imaging device according to claim 1, characterized in that, All of the plurality of second lens modules have the same configuration as each other.

18. An imaging device, characterized in that, Comprising: A first lens assembly, including a plurality of first lens modules having the same configuration as each other and a first image sensor; And A second lens assembly, arranged adjacent to the first lens assembly, and including a plurality of second lens modules having the same configuration as each other and a second image sensor, wherein, the field of view of each first lens module among the plurality of first lens modules is wider than the field of view of each second lens module among the plurality of second lens modules, and wherein, TTL_w / IMG HT_Fw < 0.85 is satisfied, where TTL_w is the distance on the optical axis from the object side surface of the front lens of the first lens module to the imaging surface of the first image sensor, and IMG HT_Fw is half of the diagonal length of the imaging surface of the first image sensor, where the front lens is the lens closest to the object side.

19. The imaging device according to claim 18, wherein, f35t / f35w ≥ 2 is satisfied, where f35t is the 35mm equivalent focal length of the second lens module, and f35w is the 35mm equivalent focal length of the first lens module.

20. The imaging device according to claim 18, characterized in that, TTL_t / IMG HT_Ft < 1.45 is satisfied, where TTL_t is the distance on the optical axis from the object side surface of the front lens of the second lens module to the imaging surface of the second image sensor, and IMG HT_Ft is half of the diagonal length of the imaging surface of the second image sensor, where the front lens of the second lens module is the lens closest to the object side.

21. The imaging device according to claim 18, characterized in that, Satisfy Fno_w > fw / IMG HT_Aw, where Fno_w is the F-number of the first lens module, fw is the total focal length of the first lens module, and IMG HT_Aw is half of the diagonal length of the area of the imaging surface of the first image sensor, the imaging surface of the first image sensor being divided corresponding to the plurality of first lens modules, and where, satisfy Fno_t > (ft / IMG HT_At)×0.9, where Fno_t is the F-number of the second lens module, ft is the total focal length of the second lens module, and IMG HT_At is half of the diagonal length of the area of the imaging surface of the second image sensor, the imaging surface of the second image sensor being divided corresponding to the plurality of second lens modules.

22. The imaging device according to claim 18, characterized in that, The optical axes of the plurality of first lens modules are parallel to each other, and where, the optical axes of the plurality of second lens modules are parallel to each other.

Images