Image forming apparatus

Abstract

The invention 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 from Korean Patent Application No. 10-2023-0112972 filed on August 28, 2023, in the Korean Intellectual Property Office, the disclosure of which is incorporated herein in its entirety for all purposes by reference. Technical Field

[0003] The present disclosure relates to imaging devices. 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] Because the size of an 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 with a short overall track length while supporting high resolution.

[0007] However, due to the size constraints of portable electronic devices, there are physical limitations in designing imaging devices with short overall track lengths while supporting high resolution.

[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 may be applicable as prior art with respect to the present disclosure. Summary of the invention

[0009] This Summary is provided to introduce a selection of concepts in a simplified form that are further described in the Detailed Description below. This Summary is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used as an aid in determining 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 including a plurality of first lens modules and a single first image sensor, the second lens assembly including a plurality of second lens modules and a single second image sensor, wherein the first lens assembly and the second lens assembly are arranged adjacent to each other, wherein 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. Here, f35t is a 35 mm equivalent focal length of the second lens module, and f35w is a 35 mm 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 from the object side of the front lens of the first lens module to the imaging surface of the single first image sensor on the optical axis, and IMG HT_Fw is half of the diagonal length of the imaging surface of the single first image sensor, where the front lens is the lens closest to the object side.

[0012] Fno_w>fw / IMG HT_Aw may 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 the diagonal length of an area of ​​an imaging surface of a single first image sensor, the imaging surface being divided to correspond to a plurality of first lens modules.

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

[0014] Fno_t>(ft / IMG HT_At)×0.9 may 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 the diagonal length of an area of ​​an imaging surface of a single second image sensor, the imaging surface being divided to correspond to a plurality of second lens modules.

[0015] The first lens assembly may include a plurality of wide-angle lens arrays sequentially arranged from the object side to the image side, the plurality of wide-angle lens arrays may respectively 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 sequentially arranged from the object side to the image side, the plurality of telephoto lens arrays may respectively 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 positive refractive power, and the second lens may have negative refractive power.

[0018] An absolute value of a difference in Abbe numbers 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 positive refractive power, and the fourth lens may have 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 positive refractive power, and the second lens may have negative refractive power.

[0022] An absolute value of a difference in Abbe numbers between the first lens and the second lens may be greater than 30 and less than 50, and an absolute value of a difference in Abbe numbers 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 positive refractive power, and the fifth lens may have negative refractive power.

[0025] The plurality of first lens modules may all have substantially the same configuration as one another.

[0026] The plurality of second lens modules may all have substantially the same configuration as one another.

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

[0028] f35t / f35w≥2 may be satisfied, where f35t is the 35 mm equivalent focal length of the second lens module, and f35w is the 35 mm equivalent focal length of the first lens module.

[0029] Optical axes of the plurality of first lens modules may be substantially parallel to each other, and 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, drawings, and claims. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

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

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

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

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

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

[0038] Figure 8 It is shown Figure 7 Graphs of aberration characteristics of the first lens module are shown in FIG.

[0039] Fig. 9 is a configuration diagram of a second lens module of a second lens assembly.

[0040] Fig.10 It is shown Fig. 9 Graphs of aberration characteristics of the second lens module shown in FIG.

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

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

[0043] The following specific embodiments are provided to help the reader gain a comprehensive understanding of the methods, devices, and / or systems described herein. However, various changes, modifications, and equivalents of the methods, devices, and / or systems described herein will be apparent after understanding the present disclosure. For example, the order of operations described herein is merely an example and is not limited to the order set forth herein, but may 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 clarity and brevity.

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

[0045] Throughout the specification, when an element (such as a layer, a region, or a substrate) is described as being “on”, “connected to”, or “coupled to” another element, it may be directly “on”, directly “connected to”, or directly “coupled to” the other element, or one or more other elements may be present between them. Conversely, when an element is described as being “directly” “on”, “directly connected to”, or “directly coupled to” another element, there are no other elements present between them.

[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; similarly, "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 members, components, regions, layers, or portions, these members, components, regions, layers, or portions are not limited by these terms. Instead, these terms are only used to distinguish one member, component, region, layer, or portion from another member, component, region, layer, or portion. Therefore, the first member, first component, first region, first layer, or first portion mentioned in the examples described herein may also be referred to as the second member, second component, second region, second layer, or second portion without departing from the teachings of the examples.

[0048] For ease of description, spatially relative terms such as "above", "upper", "below", "lower", etc. may be used herein to describe the relationship of one element to another element as shown in the drawings. In addition to the orientation depicted in the drawings, such spatially relative terms are intended to also include different orientations of the device in use or operation. For example, if the device in the drawings is turned over, an element described as being "above" or "upper" relative to another element will then be "below" or "lower" relative to the other element. Therefore, the term "above" includes both the orientation of the above and below, 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 spatially relative terms used herein will be interpreted accordingly.

[0049] The terms used herein are only used to describe various examples and are not used to limit the present disclosure. The words "a", "an" and "the" are intended to include plural forms as well, unless the context clearly indicates otherwise. The terms "include", "comprises" and "have" specify the presence of stated features, quantities, operations, components, elements and / or combinations thereof, but do not exclude 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 drawings may vary. Therefore, the examples described herein are not limited to the specific shapes shown in the drawings but include shape variations that occur during manufacturing.

[0051] Herein, it is noted that the use of the term “may” with respect to an example, such as with respect to what an example may include or implement, means that there is at least one example that includes or implements this feature, and all examples are not limited thereto.

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

[0053] One aspect of the present disclosure may provide a slim 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 apparatus 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 image forming apparatus 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 illustrating a method of generating an image using an imaging device according to an exemplary embodiment of the present disclosure.

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

[0059] Reference 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 disposed adjacent to each other. Hereinafter, for ease of description, a 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 as desired.

[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 an object is imaged using the first lens assembly 10 , each lens module of the first lens assembly 10 images the same object, and the captured images may be synthesized to generate a single finished image having a higher resolution than that of the individual images.

[0065] Furthermore, in the case of imaging an object using the second lens assembly 20, each lens module of the second lens assembly 20 may image the same object, and the captured images may be synthesized to generate a single completed image having a higher resolution than that of the individual images.

[0066] With prior art wide angle lens assemblies and telephoto lens assemblies, there are physical limitations in designing them to have high resolution and a short overall track length.

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

[0068] Furthermore, 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 the exemplary embodiment, the imaging apparatus may satisfy Conditional Expression 1 below.

[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] Reference Figure 1 The first lens assembly 10 includes a plurality of wide-angle lens arrays 11 to 15 arranged sequentially from the object side toward the image side and a first image sensor 16 .

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

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

[0076] In a lens array, a plurality of lenses may be arranged in an n×n matrix structure or an n×m matrix structure, wherein 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 a plurality of lenses are arranged in a 2×2 matrix structure in each lens array, the first lens assembly 10 includes four optical axes. The plurality of optical axes may be arranged parallel to each other.

[0078] Multiple lenses sharing a single optical axis can constitute a lens module.

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

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

[0081] In each of the first lens modules 1a to 1d, a ratio (TTL_w / (2×IMG HT_Fw)) of a distance (TTL_w) from the object side surface of the lens disposed closest to the object side on the optical axis to the first image sensor 16 to a diagonal length (2×IMG HT_Fw) of an imaging surface (effective imaging area) may be less than 0.4.

[0082] A 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 1 a to 1 d 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 respectively corresponding to the plurality of first lens modules 1 a to 1 d but includes a single first image sensor 16 .

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

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

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

[0088] exist Figure 1 and Figure 2 , for convenience 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 (ie, four first lens modules are arranged).

[0089] The first lens assembly 10 may include five lens arrays arranged in sequence 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] Therefore, one lens module may include five lenses.

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

[0092] Despite Figure 3 and Figure 4 Only the first lens assembly 10 is shown in FIG. 1 , but the second lens assembly 20 may also be configured to have a configuration similar to that of the first lens assembly 10 .

[0093] On the other hand, reference Figure 4 , the first lens assembly 10 may further include a single lens holder 17 accommodating the 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 disposed.

[0094] In an exemplary embodiment, the first lens assembly 10 may satisfy at least one of Conditional Expression 2 and Conditional Expression 3 below.

[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 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 on the optical axis, and IMG HT_Fw is half 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 the diagonal length of the area of ​​the imaging surface of the single first image sensor 16, the imaging surface being divided to correspond to the plurality of first lens modules. In the case of a 2×2 matrix structure, IMG HT_Aw may be half of IMG HT_Fw.

[0099] Figure 7 is a configuration diagram of a first lens module of a first lens assembly, and Figure 8 It is shown Figure 7 Graphs of aberration characteristics of the first lens module are shown in FIG.

[0100] Reference Figure 7 and Figure 8 The described first lens module may be any one of a plurality of first lens modules of the first lens assembly 10. Furthermore, the plurality of first lens modules may all have the same configuration.

[0101] In this specification, the object side of each lens refers to the surface close to the object side, and the image side 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 all in mm, and the unit of the field of view (FOV) is degree.

[0102] Furthermore, in the description of the shape of each lens, a shape in which one surface is convex means that the paraxial region of the corresponding surface is convex, and a shape in which 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 plane may refer to a virtual plane on which a focus is formed by the first lens module. Alternatively, the imaging plane may refer to a surface of the first image sensor that receives light.

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

[0106] For example, refer to Figure 7The 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 to fifth lenses 110 to 150 are arranged to be spaced apart from each other by a predetermined distance along the optical axis.

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

[0108] The first lens module may further include an infrared cut 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] An aperture may be disposed between the second lens 120 and the third lens 130 .

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

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

[0113] In an exemplary embodiment, an absolute value of a difference in Abbe numbers between the first lens 110 and the second lens 120 may exceed 30. In addition, an absolute value of a difference in Abbe numbers 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 the Abbe number thereof 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 the Abbe number thereof may be less than 21.

[0116] In an exemplary embodiment, the first lens module may satisfy a 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 a 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 focus on an imaging surface 170. The imaging surface 170 may refer to a plane on which a focus is formed by the first lens module. As an example, the imaging surface 170 may refer to one surface of the first image sensor that receives light.

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

[0121] Table 1

[0122] Face 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 The third lens -11.891 0.462 1.551 55.99 S7 -5.956 0.512 S8 The 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 Optical Filters 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 (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 positive refractive power, the object-side surface of the first lens 110 is convex, and the image-side surface of the first lens 110 is concave.

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

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

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

[0128] In addition, the fourth lens 140 has at least one inflection point formed on at least one of the object side surface and the image side surface. For example, the object side surface 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 positive refractive power, the object-side surface of the fifth lens 150 is convex, and the image-side surface 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 surface and the image-side surface of the fifth lens 150. For example, the object-side surface of the fifth lens 150 may be convex in the paraxial region and concave in a portion other than the paraxial region.

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

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

[0133] Furthermore, the first lens module configured in this manner may have Figure 8 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 sequence from the object side toward 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 include a plurality of lenses, respectively.

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

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

[0139] The second lens assembly 20 includes a plurality of optical axes. For example, when a 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] Multiple lenses sharing a single optical axis can constitute a lens module.

[0141] The multiple lenses sharing a single optical axis may be lenses arranged in different lens arrays.

[0142] When a 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 2 a to 2 d.

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

[0144] A 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 2 a to 2 d 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 respectively corresponding to the plurality of second lens modules 2 a to 2 d, but includes a single second image sensor 26 .

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

[0148] For example, refer to Figure 6 , the 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 completed image having a higher resolution than that of the individual images.

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

[0151] The second lens assembly 20 may include five lens arrays arranged sequentially 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 Conditional Expression 4 and Conditional Expression 5 below.

[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 from the object side surface of the front lens (the lens disposed closest to the object side) of the second lens module to the imaging surface of the single second image sensor 26 on the optical axis, and IMG HT_Ft is half 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 the diagonal length of the area of ​​the imaging surface of the single second image sensor 26, the imaging surface being divided to correspond to the plurality of second lens modules. In the case of a 2×2 matrix structure, IMG HT_At may be half of IMG HT_Ft.

[0158] Fig. 9 is a configuration diagram of a second lens module of a second lens assembly, and Fig.10 It is shown Fig. 9 Graphs of aberration characteristics of the second lens module shown in FIG.

[0159] Reference Fig. 9 and Fig.10 The described second lens module may be any one of a plurality of second lens modules of the second lens assembly 20. Furthermore, the plurality of second lens modules may all have the same configuration.

[0160] The imaging plane may refer to a virtual plane on which a focus is formed by the second lens module. Alternatively, the imaging plane may refer to a surface of the second image sensor that receives light.

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

[0162] For example, refer to Fig. 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 to be spaced apart from each other by a predetermined distance along the optical axis.

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

[0164] The second lens module may further include an infrared cut 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] An aperture S may be disposed between the second lens 220 and the third lens 230 .

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

[0168] In addition, the first to fifth lenses 210 to 250 may each be formed of a plastic material having optical characteristics (refractive index, Abbe number, etc.) different from those of 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 the Abbe number thereof 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 the Abbe number thereof may be less than 20.

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

[0173] In an exemplary embodiment, the second lens module may satisfy a 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 a 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 a 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 focus on an imaging surface 270. The imaging surface 270 may refer to a plane on which a focus is formed by the second lens module. As an example, the imaging surface 270 may refer to one surface of the second image sensor that receives light.

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

[0179] Table 2

[0180] Face 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 The third lens 1.68459 0.221 1.575 37.40 S7 1.826 0.240 S8 The 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 Optical Filters 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 (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 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 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 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 positive refractive power, an object-side surface of the fourth lens 240 is concave, and an image-side surface of the fourth lens 240 is convex.

[0186] The fifth lens 250 has 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] The inflection point is the point where the surface of a lens changes from concave to convex or from convex to concave.

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

[0190] Furthermore, the second lens module configured in this manner may have Fig.10 Aberration characteristics shown in .

[0191] An imaging device according to one or more exemplary embodiments of the present disclosure as described herein may 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 may 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 limiting purposes. The description of the features or aspects in each example is considered to be applicable to similar features or aspects in other examples. Suitable results may also be obtained if the described techniques are performed in a different order, and / or if the components in the described systems, architectures, devices, or circuits are combined in different ways and / or replaced or supplemented by other components or their equivalents. Therefore, the scope of the present disclosure is not limited by specific embodiments, but by the claims and their equivalents, and all changes within the scope of the claims and their equivalents will be interpreted as included in the present disclosure.

Claims

1. An imaging device, comprising: A first lens assembly including a plurality of first lens modules and a single first image sensor; as well as a second lens assembly including a plurality of second lens modules and a single second image sensor, wherein the first lens assembly and the second lens assembly are arranged adjacent to each other, wherein 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, wherein f35t is the 35 mm equivalent focal length of the second lens module, and f35w is the 35 mm 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, wherein TTL_w is the distance on the optical axis from the object side 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, wherein 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, wherein 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, the imaging surface being divided into areas corresponding to the multiple first lens modules.

4. The imaging device according to claim 1, wherein TTL_t / IMG HT_Ft<1.45 is satisfied, wherein 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, wherein 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 single second image sensor, the imaging surface being divided into areas corresponding to the multiple 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 sequentially 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 sequentially 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 toward the image side. The first lens has positive refractive power, and The second lens has negative refractive power.

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

10. The imaging device according to claim 9, wherein 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 positive refractive power, and the fourth lens has 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 positive refractive power, and The second lens has negative refractive power.

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

14. The imaging device according to claim 13, wherein 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, wherein: The fourth lens has positive refractive power, and the fifth lens has negative refractive power.

16. The imaging device according to claim 1, wherein The plurality of first lens modules all have the same configuration as one another.

17. The imaging device according to claim 1, wherein The plurality of second lens modules all have the same configuration as one another.

18. An imaging device comprising: a first lens assembly including a plurality of first lens modules having the same configuration as one another and a single first image sensor; as well as a second lens assembly disposed adjacent to the first lens assembly and including a plurality of second lens modules having the same configuration as each other and a single second image sensor, wherein 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, TTL_w / IMG HT_Fw<0.85 is satisfied, wherein TTL_w is the distance on the optical axis from the object side 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, wherein 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, wherein f35t is the 35 mm equivalent focal length of the second lens module, and f35w is the 35 mm equivalent focal length of the first lens module.

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

21. The imaging device according to claim 18, wherein Fno_w>fw / IMG HT_Aw is satisfied, wherein 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, the imaging surface of the single first image sensor being divided into areas corresponding to the plurality of first lens modules, and 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 single second image sensor, and the imaging surface of the single second image sensor is divided into areas corresponding to the multiple second lens modules.

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

Images