Imaging device and electronic device including same

Abstract

According to an embodiment of the present disclosure, an imaging device may comprise a lens assembly which includes lenses sequentially arranged along the optical axis and is configured to focus or guide light incident along the optical axis. In an embodiment, the lenses may comprise: a first lens disposed farthest from an image sensor and having negative refractive power; a second lens disposed between the first lens and the image sensor and having a concave periphery portion on the object-side surface thereof; a third lens disposed between the second lens and the image sensor and having positive refractive power or negative refractive power; a fourth lens disposed between the third lens and the image sensor and having positive refractive power; a fifth lens disposed between the fourth lens and the image sensor and having negative refractive power; and a sixth lens disposed between the fifth lens and the image sensor and having positive refractive power or negative refractive power. In an embodiment, the lens assembly may suppress the occurrence of a performance deviation according to a temperature change, while implementing wide-angle / ultra-wide-angle performance by satisfying the disclosed conditions. Other various embodiments may also be possible.

Description

Imaging device and electronic device including the same

[0001] Embodiments of the present disclosure relate to electronic devices, for example, imaging devices and / or electronic devices including the same.

[0002] With the advancement of electronics, information, and communication technologies, a variety of functions are being integrated into a single electronic device. For example, electronic devices (e.g., smartphones) incorporate functions such as audio playback, imaging, and electronic notebooks in addition to communication functions. Furthermore, smartphones can be equipped with even more diverse functions through the installation of additional applications. In addition to executing pre-installed applications or stored functions, electronic devices can also access servers or other electronic devices via wired or wireless means to receive a variety of information in real time.

[0003] As the use of electronic devices becomes more commonplace, user demand for portability and usability may increase. This demand has led to the commercialization of wearable electronic devices (hereinafter referred to as "wearable electronic devices") that can be worn on the body, similar to wristwatches or glasses. Among wearable electronic devices, those that can be worn on the face can be useful for implementing virtual reality or augmented reality. For example, wearable electronic devices can provide a three-dimensional image of a virtual space within a game played on a television or computer monitor, while blocking the image of the actual space the user is in, thereby implementing virtual reality. Other types of wearable electronic devices can provide an environment where the user can visually perceive the actual image of the space they are in, while presenting a virtual image to provide the user with various visual information, thereby implementing augmented reality. A "real image of the space" can include, for example, an image captured by a camera or an image transmitted through see-through optics. A 'virtual image' may include information about the space in which the user is staying and / or information about various objects within the space.

[0004] The above information may be provided as background art to aid in understanding the present disclosure. No claim or determination is made as to whether any of the above is applicable as prior art in connection with the present disclosure.

[0005] According to one embodiment of the present disclosure, an imaging device may include a lens assembly including lenses sequentially arranged along an optical axis and configured to focus or guide light incident along the optical axis, and an image sensor configured to receive light focused or guided by the lens assembly. In one embodiment, the lenses may include a first lens disposed farthest from the image sensor and having a negative refractive power, a second lens disposed between the first lens and the image sensor and having a concave periphery of an object-side surface, a third lens disposed between the second lens and the image sensor and having a positive or negative refractive power, a fourth lens disposed between the third lens and the image sensor and having a positive refractive power, a fifth lens disposed between the fourth lens and the image sensor and having a negative refractive power, and a sixth lens disposed between the fifth lens and the image sensor and having a positive or negative refractive power. In one embodiment, the lens assembly may satisfy [Conditional Expression 1; 0.3 <= f 2 / Fno <= 2.0] and / or [Conditional expression 2; 3 <= |R21 / R12| <= 30] can be satisfied. Here, 'f' is the focal length of the lens assembly, and the unit is 'mm', 'Fno' is the F-number of the lens assembly, 'R21' is the radius of curvature of the object-side surface of the second lens, and 'R12' is the radius of curvature of the sensor-side surface of the first lens, and the radius of curvature is in 'mm' and can be measured at a point intersecting the optical axis.

[0006] According to one embodiment of the present disclosure, an imaging device may include a lens assembly including lenses sequentially arranged along an optical axis and configured to focus or guide light incident along the optical axis, and an image sensor configured to receive light focused or guided by the lens assembly. In one embodiment, the lenses may include a first lens disposed farthest from the image sensor and having negative refractive power, a second lens disposed between the first lens and the image sensor and having a concave periphery of an object-side surface, a third lens disposed between the second lens and the image sensor and having positive or negative refractive power, a fourth lens disposed between the third lens and the image sensor and having positive refractive power, a fifth lens disposed between the fourth lens and the image sensor and having negative refractive power, and a sixth lens disposed between the fifth lens and the image sensor and having positive or negative refractive power. In one embodiment, at least one of the lenses may satisfy the following [Conditional Expression 3; 0.5 <= GL_f / f <= 2.0], [Conditional Expression 4; 1.57 <= GL_Nd <= 2.1], and [Conditional Expression 5; 40 <= GL_Vd <= 82] can be satisfied. Here, 'GL_f' is the focal length of the lens satisfying [Conditional Expression 3], [Conditional Expression 4], and [Conditional Expression 5], 'GL_Nd' is the refractive index of the lens satisfying [Conditional Expression 3], [Conditional Expression 4], and [Conditional Expression 5], and 'GL_Vd' can be the Abbe number of the lens satisfying [Conditional Expression 3], [Conditional Expression 4], and [Conditional Expression 5].

[0007] According to one embodiment of the present disclosure, an electronic device includes an imaging device as described above or described below, a memory, and at least one processor, wherein the memory may store instructions that, when executed by the at least one processor, cause the electronic device to acquire an image of a subject including a user's hand using the imaging device.

[0008] The above-described aspects or other aspects, configurations and / or advantages of one embodiment of the present disclosure may be further clarified by the following detailed description taken in conjunction with the accompanying drawings.

[0009] FIG. 1 is a block diagram illustrating an electronic device within a network environment according to one embodiment of the present disclosure.

[0010] FIG. 2 is a diagram illustrating a wearable electronic device according to one embodiment of the present disclosure.

[0011] FIGS. 3 and 4 are drawings showing the front and back of a wearable electronic device according to one embodiment of the present disclosure.

[0012] FIG. 5 is a drawing showing an imaging device or lens assembly according to one embodiment of the present disclosure.

[0013] FIG. 6 is a graph showing spherical aberration of the imaging device or lens assembly of FIG. 5 according to one embodiment of the present disclosure.

[0014] FIG. 7 is a graph showing astigmatism of the imaging device or lens assembly of FIG. 5 according to one embodiment of the present disclosure.

[0015] FIG. 8 is a graph showing the distortion rate of the imaging device or lens assembly of FIG. 5 according to one embodiment of the present disclosure.

[0016] FIG. 9 is a drawing showing an imaging device or lens assembly according to one embodiment of the present disclosure.

[0017] FIG. 10 is a graph showing spherical aberration of the imaging device or lens assembly of FIG. 9 according to one embodiment of the present disclosure.

[0018] FIG. 11 is a graph showing astigmatism of the imaging device or lens assembly of FIG. 9 according to one embodiment of the present disclosure.

[0019] FIG. 12 is a graph showing the distortion rate of the imaging device or lens assembly of FIG. 9 according to one embodiment of the present disclosure.

[0020] FIG. 13 is a drawing showing an imaging device or lens assembly according to one embodiment of the present disclosure.

[0021] FIG. 14 is a graph showing spherical aberration of the imaging device or lens assembly of FIG. 13 according to one embodiment of the present disclosure.

[0022] FIG. 15 is a graph showing astigmatism of the imaging device or lens assembly of FIG. 13 according to one embodiment of the present disclosure.

[0023] FIG. 16 is a graph showing the distortion rate of the imaging device or lens assembly of FIG. 13 according to one embodiment of the present disclosure.

[0024] Throughout the attached drawings, similar reference numbers may be assigned to similar parts, components and / or structures.

[0025] As electronic devices become more integrated and their performance becomes more advanced, heat generation can deteriorate their operating environment. Heat generated within an electronic device can reduce the operating efficiency of various electronic components and distort the performance of optical devices such as cameras. For example, when lenses deform (e.g., shrink or expand) due to changes in the internal temperature of the electronic device, the optical performance of an imaging device may deviate from its design specifications and / or deteriorate below its design specifications. While various methods have been proposed to dissipate heat to the outside environment, they may have limitations in preventing heat generated within the electronic device from reaching the imaging device. Wearable electronic devices may include multiple imaging devices to detect the user's movements or collect information about the surrounding environment. Because they are worn on the body, the imaging device(s) may be easily exposed to heat. Moreover, the internal temperature of the electronic device may vary depending on the functions being performed on the electronic device, and variations in the temperature in the operating environment (e.g., the internal temperature of the electronic device) may cause deviations in the optical performance of the imaging device(s).

[0026] One embodiment of the present disclosure is intended to at least resolve the above-described problems and / or disadvantages and at least provide the advantages described below, and can provide an imaging device and / or an electronic device including the same in which optical performance deviation due to temperature change in an operating environment is suppressed.

[0027] One embodiment of the present disclosure can provide an imaging device and / or an electronic device including the same that provides stable optical performance even when the operating environment changes significantly.

[0028] One embodiment of the present disclosure can provide an imaging device and / or an electronic device including the same that provides wide-angle or ultra-wide-angle performance while miniaturizing the size visible from the outside.

[0029] The technical problems to be achieved in this document are not limited to the technical problems mentioned above, and other technical problems not mentioned can be clearly understood by a person having ordinary skill in the technical field to which the present disclosure belongs from the description below.

[0030] The following description of the accompanying drawings may provide an understanding of various exemplary implementations of the present disclosure, including the claims and their equivalents. While the exemplary embodiments disclosed in the following description include numerous specific details to aid understanding, they are to be considered as one example of various exemplary embodiments. Accordingly, those skilled in the art will appreciate that various modifications and variations of the various implementations described herein may be made without departing from the scope and spirit of the disclosure. Furthermore, descriptions of well-known functions and configurations may be omitted for clarity and conciseness.

[0031] The terms and words used in the following description and claims are not limited to their reference meanings and can be used to clearly and consistently describe one embodiment of the present disclosure. Therefore, it will be apparent to those skilled in the art that the following description of various implementations of the disclosure is provided for illustrative purposes, not for the purpose of limiting the scope of the disclosure and its equivalents.

[0032] Unless the context clearly dictates otherwise, the singular forms of "a," "an," and "the" should be understood to include plural meanings. Thus, for example, "a component surface" could be understood to include one or more of the surfaces of the component.

[0033] FIG. 1 is a block diagram of an electronic device (101) within a network environment (100) according to one embodiment of the present disclosure. Referring to FIG. 1 , in the network environment (100), the electronic device (101) may communicate with the electronic device (102) via a first network (198) (e.g., a short-range wireless communication network), or may communicate with at least one of the electronic device (104) or the server (108) via a second network (199) (e.g., a long-range wireless communication network). In one embodiment, the electronic device (101) may communicate with the electronic device (104) via the server (108). According to one embodiment, the electronic device (101) may include a processor (120), a memory (130), an input module (150), an audio output module (155), a display module (160), an audio module (170), a sensor module (176), an interface (177), a connection terminal (178), a haptic module (179), a camera module (180), a power management module (188), a battery (189), a communication module (190), a subscriber identification module (196), or an antenna module (197). In one embodiment, the electronic device (101) may have at least one of these components (e.g., the connection terminal (178)) omitted, or one or more other components added. In one embodiment, some of these components (e.g., the sensor module (176), the camera module (180), or the antenna module (197)) may be integrated into one component (e.g., the display module (160)).

[0034] The processor (120) may, for example, execute software (e.g., a program (140)) to control at least one other component (e.g., a hardware or software component) of the electronic device (101) connected to the processor (120) and perform various data processing or operations. According to one embodiment, as at least a part of the data processing or operations, the processor (120) may store commands or data received from other components (e.g., a sensor module (176) or a communication module (190)) in a volatile memory (132), process the commands or data stored in the volatile memory (132), and store result data in a non-volatile memory (134). According to one embodiment, the processor (120) may include a main processor (121) (e.g., a central processing unit or an application processor), or an auxiliary processor (123) (e.g., a graphics processing unit, a neural processing unit (NPU), an image signal processor, a sensor hub processor, or a communication processor) that can operate independently or together with the main processor (121). For example, when the electronic device (101) includes the main processor (121) and the auxiliary processor (123), the auxiliary processor (123) may be configured to use less power than the main processor (121) or to be specialized for a given function. The auxiliary processor (123) may be implemented separately from the main processor (121) or as a part thereof.

[0035] The auxiliary processor (123) may control at least a portion of functions or states associated with at least one component (e.g., a display module (160), a sensor module (176), or a communication module (190)) of the electronic device (101), for example, on behalf of the main processor (121) while the main processor (121) is in an inactive (e.g., sleep) state, or together with the main processor (121) while the main processor (121) is in an active (e.g., application execution) state. In one embodiment, the auxiliary processor (123) (e.g., an image signal processor or a communication processor) may be implemented as a part of another functionally related component (e.g., a camera module (180) or a communication module (190)). In one embodiment, the auxiliary processor (123) (e.g., a neural network processing unit) may include a hardware structure specialized for processing artificial intelligence models. The artificial intelligence models may be generated through machine learning. This learning can be performed, for example, on the electronic device (101) itself where the artificial intelligence model is executed, or can be performed through a separate server (e.g., server (108)). The learning algorithm can include, for example, supervised learning, unsupervised learning, semi-supervised learning, or reinforcement learning, but is not limited to the examples described above. The artificial intelligence model can include multiple artificial neural network layers.The artificial neural network may be one of a deep neural network (DNN), a convolutional neural network (CNN), a recurrent neural network (RNN), a restricted Boltzmann machine (RBM), a deep belief network (DBN), a bidirectional recurrent deep neural network (BRDNN), a deep Q-network, or a combination of two or more of the above, but is not limited to the examples described above. In addition to, or alternatively to, a hardware structure, an artificial intelligence model may include a software structure.

[0036] The memory (130) can store various data used by at least one component (e.g., processor (120) or sensor module (176)) of the electronic device (101). The data can include, for example, software (e.g., program (140)) and input data or output data for commands related thereto. The memory (130) can include volatile memory (132) or non-volatile memory (134).

[0037] The program (140) may be stored as software in the memory (130) and may include, for example, an operating system (142), middleware (144), or an application (146).

[0038] The input module (150) can receive commands or data to be used in a component of the electronic device (101) (e.g., a processor (120)) from an external source (e.g., a user) of the electronic device (101). The input module (150) can include, for example, a microphone, a mouse, a keyboard, a key (e.g., a button), or a digital pen (e.g., a stylus pen).

[0039] The audio output module (155) can output audio signals to the outside of the electronic device (101). The audio output module (155) can include, for example, a speaker or a receiver. The speaker can be used for general purposes, such as multimedia playback or recording playback. The receiver can be used to receive incoming calls. In one embodiment, the receiver can be implemented separately from the speaker or as part of the speaker.

[0040] The display module (160) can visually provide information to an external party (e.g., a user) of the electronic device (101). The display module (160) may include, for example, a display, a holographic device, or a projector and a control circuit for controlling the device. According to one embodiment, the display module (160) may include a touch sensor configured to detect a touch, or a pressure sensor configured to measure the intensity of a force generated by the touch.

[0041] The audio module (170) can convert sound into an electrical signal, or vice versa, convert an electrical signal into sound. According to one embodiment, the audio module (170) can acquire sound through the input module (150), output sound through the sound output module (155), or an external electronic device (e.g., electronic device (102)) (e.g., speaker or headphone) directly or wirelessly connected to the electronic device (101).

[0042] The sensor module (176) can detect the operating status (e.g., power or temperature) of the electronic device (101) or the external environmental status (e.g., user status) and generate an electrical signal or data value corresponding to the detected status. According to one embodiment, the sensor module (176) can include, for example, a gesture sensor, a gyro sensor, a barometric pressure sensor, a magnetic sensor, an acceleration sensor, a grip sensor, a proximity sensor, a color sensor, an IR (infrared) sensor, a biometric sensor, a temperature sensor, a humidity sensor, or an illuminance sensor.

[0043] The interface (177) may support one or more designated protocols that may be used to directly or wirelessly connect the electronic device (101) to an external electronic device (e.g., the electronic device (102)). In one embodiment, the interface (177) may include, for example, a high definition multimedia interface (HDMI), a universal serial bus (USB) interface, an SD card interface, or an audio interface.

[0044] The connection terminal (178) may include a connector through which the electronic device (101) may be physically connected to an external electronic device (e.g., electronic device (102)). According to one embodiment, the connection terminal (178) may include, for example, an HDMI connector, a USB connector, an SD card connector, or an audio connector (e.g., a headphone connector).

[0045] The haptic module (179) can convert electrical signals into mechanical stimuli (e.g., vibration or movement) or electrical stimuli that a user can perceive through tactile or kinesthetic sensations. According to one embodiment, the haptic module (179) can include, for example, a motor, a piezoelectric element, or an electrical stimulation device.

[0046] The camera module (180) can capture still images and moving images. According to one embodiment, the camera module (180) may include one or more lenses, image sensors, image signal processors, or flashes.

[0047] The power management module (188) can manage power supplied to the electronic device (101). According to one embodiment, the power management module (188) can be implemented as, for example, at least a part of a power management integrated circuit (PMIC).

[0048] A battery (189) may power at least one component of the electronic device (101). In one embodiment, the battery (189) may include, for example, a non-rechargeable primary battery, a rechargeable secondary battery, or a fuel cell.

[0049] The communication module (190) may support the establishment of a direct (e.g., wired) communication channel or a wireless communication channel between the electronic device (101) and an external electronic device (e.g., electronic device (102), electronic device (104), or server (108)), and the performance of communication through the established communication channel. The communication module (190) may operate independently from the processor (120) (e.g., application processor) and may include one or more communication processors that support direct (e.g., wired) communication or wireless communication. According to one embodiment, the communication module (190) may include a wireless communication module (192) (e.g., a cellular communication module, a short-range wireless communication module, or a global navigation satellite system (GNSS) communication module) or a wired communication module (194) (e.g., a local area network (LAN) communication module, or a power line communication module). Among these communication modules, the corresponding communication module can communicate with an external electronic device via a first network (198) (e.g., a short-range communication network such as Bluetooth, wireless fidelity (WiFi) direct, or infrared data association (IrDA)) or a second network (199) (e.g., a long-range communication network such as a legacy cellular network, a 5G network, a next-generation communication network, the Internet, or a computer network (e.g., a LAN or WAN)). These various types of communication modules can be integrated into a single component (e.g., a single chip) or implemented as multiple separate components (e.g., multiple chips). The wireless communication module (192) can verify or authenticate the electronic device (101) within a communication network such as the first network (198) or the second network (199) by using subscriber information (e.g., an international mobile subscriber identity (IMSI)) stored in the subscriber identification module (196).

[0050] The wireless communication module (192) can support 5G networks and next-generation communication technologies following the 4G network, such as NR access technology (new radio access technology). The NR access technology can support high-speed transmission of high-capacity data (eMBB (enhanced mobile broadband)), minimization of terminal power and connection of multiple terminals (mMTC (massive machine type communications)), or high reliability and low latency (URLLC (ultra-reliable and low-latency communications)). The wireless communication module (192) can support, for example, a high-frequency band (e.g., mmWave band) to achieve a high data transmission rate. The wireless communication module (192) can support various technologies for securing performance in a high-frequency band, such as beamforming, massive multiple-input and multiple-output (MIMO), full dimensional MIMO (FD-MIMO), array antenna, analog beam-forming, or large scale antenna. The wireless communication module (192) can support various requirements specified in the electronic device (101), an external electronic device (e.g., the electronic device (104)), or a network system (e.g., the second network (199)). According to one embodiment, the wireless communication module (192) can support a peak data rate (e.g., 20 Gbps or more) for eMBB realization, a loss coverage (e.g., 164 dB or less) for mMTC realization, or a U-plane latency (e.g., 0.5 ms or less for downlink (DL) and uplink (UL), or 1 ms or less for round trip) for URLLC realization.

[0051] The antenna module (197) can transmit or receive signals or power to or from an external device (e.g., an external electronic device). In one embodiment, the antenna module may include an antenna including a radiator formed of a conductor or a conductive pattern formed on a substrate (e.g., a PCB). In one embodiment, the antenna module (197) may include a plurality of antennas (e.g., an array antenna). In this case, at least one antenna suitable for a communication method used in a communication network, such as the first network (198) or the second network (199), may be selected from the plurality of antennas, for example, by the communication module (190). A signal or power may be transmitted or received between the communication module (190) and an external electronic device via the at least one selected antenna. In one embodiment, in addition to the radiator, another component (e.g., a radio frequency integrated circuit (RFIC)) may be additionally formed as a part of the antenna module (197).

[0052] In one embodiment, the antenna module (197) may form a mmWave antenna module. In one embodiment, the mmWave antenna module may include a printed circuit board, an RFIC disposed on or adjacent a first surface (e.g., a bottom surface) of the printed circuit board and capable of supporting a designated high-frequency band (e.g., a mmWave band), and a plurality of antennas (e.g., an array antenna) disposed on or adjacent a second surface (e.g., a top surface or a side surface) of the printed circuit board and capable of transmitting or receiving signals in the designated high-frequency band.

[0053] At least some of the above components can be interconnected and exchange signals (e.g., commands or data) with each other via a communication method between peripheral devices (e.g., a bus, GPIO (general purpose input and output), SPI (serial peripheral interface), or MIPI (mobile industry processor interface)).

[0054] According to one embodiment, commands or data may be transmitted or received between the electronic device (101) and an external electronic device (104) via a server (108) connected to a second network (199). Each of the external electronic devices (102 or 104) may be the same or a different type of device as the electronic device (101). According to one embodiment, all or part of the operations executed in the electronic device (101) may be executed in one or more of the external electronic devices (102, 104, or 108). For example, when the electronic device (101) is to perform a certain function or service automatically or in response to a request from a user or another device, the electronic device (101) may, instead of or in addition to executing the function or service itself, request one or more external electronic devices to perform the function or at least a part of the service. One or more external electronic devices that receive the request may execute at least a portion of the requested function or service, or an additional function or service related to the request, and transmit the result of the execution to the electronic device (101). The electronic device (101) may process the result as is or additionally and provide it as at least a portion of a response to the request. For this purpose, cloud computing, distributed computing, mobile edge computing (MEC), or client-server computing technology may be used, for example. The electronic device (101) may provide an ultra-low latency service by using distributed computing or mobile edge computing, for example. In one embodiment, the external electronic device (104) may include an Internet of Things (IoT) device. The server (108) may be an intelligent server utilizing machine learning and / or a neural network. According to one embodiment, the external electronic device (104) or the server (108) may be included in the second network (199).The electronic device (101) can be applied to intelligent services (e.g., smart home, smart city, smart car, or healthcare) based on 5G communication technology and IoT-related technology.

[0055] Electronic devices according to embodiments of the present disclosure may take various forms. Electronic devices may include, for example, portable communication devices (e.g., smartphones), computer devices, portable multimedia devices, portable medical devices, cameras, wearable devices, or home appliances. Electronic devices according to embodiments of the present disclosure are not limited to the aforementioned devices.

[0056] The embodiments of the present disclosure and the terminology used therein are not intended to limit the technical features described in this document to specific embodiments, but should be understood to encompass various modifications, equivalents, or substitutes of the embodiments. In connection with the description of the drawings, similar reference numerals may be used for similar or related components. The singular form of a noun corresponding to an item may include one or more of the items, unless the context clearly dictates otherwise. In this document, phrases such as "A or B," "at least one of A and B," "at least one of A or B," "A, B, or C," "at least one of A, B, and C," and "at least one of A, B, or C" can each include any one of the items listed together in the corresponding phrase, or all possible combinations thereof. Terms such as "first," "second," or "first" or "second" may be used simply to distinguish the corresponding component from other corresponding components, and do not limit the corresponding components in any other respect (e.g., importance or order). When a component (e.g., a first component) is referred to as being “coupled” or “connected” to another component (e.g., a second component), with or without the terms “functionally” or “communicatively,” it is understood that the component can be connected to the other component directly (e.g., wired), wirelessly, or via a third component.

[0057] The term "module" used in the embodiments of the present disclosure may include a unit implemented in hardware, software, or firmware, and may be used interchangeably with terms such as logic, logic block, component, or circuit. A module may be an integral component, or a minimum unit or part of such a component that performs one or more functions. For example, according to one embodiment, a module may be implemented in the form of an application-specific integrated circuit (ASIC).

[0058] Embodiments of the present disclosure may be implemented as software (e.g., a program) including one or more instructions stored in a storage medium (e.g., built-in memory or external memory) readable by a machine (e.g., an electronic device). For example, a processor (e.g., a processor) of the machine (e.g., an electronic device) may call at least one instruction among the one or more instructions stored from the storage medium and execute it. This enables the machine to operate to perform at least one function according to the at least one instruction called. The one or more instructions may include code generated by a compiler or code executable by an interpreter. The machine-readable storage medium may be provided in the form of a non-transitory storage medium. Here, "non-transitory" only means that the storage medium is a tangible device and does not contain a signal (e.g., electromagnetic waves), and this term does not distinguish between cases where data is stored semi-permanently and cases where it is stored temporarily in the storage medium.

[0059] According to one embodiment, a method according to the embodiment(s) of the present disclosure may be provided as a computer program product. The computer program product may be traded between sellers and buyers as a product. The computer program product may be distributed in the form of a device-readable storage medium (e.g., compact disc read only memory (CD-ROM)) or may be provided through an application store (e.g., Play Store). TM ) or directly between two user devices (e.g., smartphones), online distribution (e.g., downloading or uploading). In the case of online distribution, at least a portion of the computer program product may be at least temporarily stored or temporarily created in a machine-readable storage medium, such as the memory of a manufacturer's server, an application store's server, or an intermediary server.

[0060] According to one embodiment, each component (e.g., a module or a program) of the above-described components may include one or more entities, and some of the entities may be separated and placed in other components. According to one embodiment, one or more components or operations of the aforementioned components may be omitted, or one or more other components or operations may be added. Alternatively or additionally, a plurality of components (e.g., a module or a program) may be integrated into a single component. In such a case, the integrated component may perform one or more functions of each of the plurality of components identically or similarly to those performed by the corresponding component among the plurality of components prior to the integration. According to one embodiment, the operations performed by a module, program, or other component may be executed sequentially, in parallel, iteratively, or heuristically, or one or more of the operations may be executed in a different order, omitted, or one or more other operations may be added.

[0061] FIG. 2 is a drawing showing a wearable electronic device (200) according to one embodiment of the present disclosure.

[0062] In describing one embodiment of the present disclosure, some numerical values ​​and the like may be presented, but it should be noted that such numerical values ​​do not limit the embodiment(s) of the present disclosure unless otherwise stated in the claims.

[0063] Referring to FIG. 2, a wearable electronic device (200) (e.g., electronic device (101) of FIG. 1) is an electronic device that can be worn on a user's head or face, and the user can visually recognize surrounding objects or environments even while wearing the wearable electronic device (200). The wearable electronic device (200) can acquire and / or recognize visual images of objects or environments viewed by the user or in the direction in which the wearable electronic device (200) is directed using a camera module, and can receive information about the objects or environments from an external electronic device via a network. The wearable electronic device (200) can provide the user with information about the objects or environments received in an acoustic or visual form. For example, the wearable electronic device (200) can provide the user with information about the objects or environments received in a visual form using a display member such as a display module (e.g., display module (160) of FIG. 1). By visualizing information about objects or the environment and combining it with actual images (or videos) of the user's surroundings, the wearable electronic device (200) can implement augmented reality (AR), virtual reality (VR), mixed reality (MR), and / or extended reality (XR). The display member can provide the user with information about objects or the environment around him / her by outputting a screen in which an augmented reality object is added to an actual image (or video) of the user's surroundings.

[0064] According to one embodiment, all or part of the operations executed by the electronic device (101) or the wearable electronic device (200) may be executed by one or more of the external electronic devices (102, 104, or 108). For example, when the electronic device (101) or the wearable electronic device (200) is to perform a certain function or service automatically or in response to a request from a user or another device, the electronic device (101) or the wearable electronic device (200) may, instead of executing the function or service by itself or in addition, request one or more of the external electronic devices (102, 104, or 108) to execute the function or at least a part of the service. The one or more external electronic devices that receive the request may execute at least a part of the requested function or service, or an additional function or service related to the request, and transmit the result of the execution to the electronic device (101) or the wearable electronic device (200). The electronic device (101) or the wearable electronic device (200) may process the result as is or additionally and provide it as at least a part of a response to the request. For example, the external electronic device (102) renders content data executed in an application and transmits it to the electronic device (101) or the wearable electronic device (200), and the electronic device (101) or the wearable electronic device (200) that receives the data may output the content data to a display module. When the electronic device (101) or the wearable electronic device (200) detects user movement through a sensor(s) such as an inertial measurement unit sensor, the processor (e.g., the processor (120) of FIG. 1) of the electronic device (101) or the wearable electronic device (200) may correct the rendering data received from the external electronic device (102) based on the movement information and output the corrected data to the display module.Or, when a user movement is detected through a sensor(s), a processor (e.g., processor (120) of FIG. 1) of the electronic device (101) or wearable electronic device (200) may transmit the movement information to an external electronic device (102) and request rendering so that screen data is updated accordingly. According to various embodiments, the external electronic device (102) may be a device of various forms, such as a case device capable of storing and charging the electronic device (101).

[0065] It should be noted that the detailed description below may refer to various things such as “a state or position in which an electronic device or a designated component of an electronic device faces the user’s face,” and this is based on the assumption that the user is wearing the wearable electronic device (200).

[0066] According to one embodiment, the wearable electronic device (200) may include at least one display member and a wearing member. Depending on the structure of the display member, the wearable electronic device (200) may further include a structure (e.g., a lens frame) for mounting or supporting the display member. The display members may be provided as a pair including a first display member and a second display member, and may be arranged to correspond to the user's right eye and left eye, respectively, when the wearable electronic device (200) is worn on the user's body. In one embodiment, the wearable electronic device (200) may also include a housing form (e.g., a goggle form) including one display member corresponding to the right eye and the left eye.

[0067] According to one embodiment, the display member is a configuration provided to provide visual information to a user, and may include, for example, a display (D), a plurality of lenses (L1, L2, L3, L4) and / or at least one sensor. Here, the lens assembly and the display (D) may each be formed transparently or translucently. However, the display member is not limited thereto. In one embodiment, the display member may include a window member, and the window member may be a translucent glass material or a member whose light transmittance can be adjusted as the tinting concentration is adjusted.

[0068] In one embodiment, the display member may include a lens including a waveguide, or a reflective lens, and an image output from an optical output device (e.g., a projector or a display (D)) may be focused on each lens to provide visual information to the user. For example, the display member may include a waveguide (e.g., a light waveguide) in at least a portion of each lens, and may mean a display that transmits an image (or light) output from an optical output device such as the display (D) to the user's eyes through the waveguide included in the display member, and at the same time transmits the real world to the user's eyes through that area in a see-through manner. In one embodiment, the waveguide may be understood as a part of a lens assembly. In a display member in which a plurality of lenses (e.g., L1, L2, L3, L4) and a reflective member are combined, as in the lens assembly (LA) of FIG. 5 described below, the waveguide may be omitted.

[0069] According to one embodiment, the lens assembly may be configured to include a plurality of lenses (e.g., L1, L2, L3, L4) without including a waveguide, and may be arranged sequentially in space within the wearable electronic device (200). For example, visual information output from the display (D) may be provided to the user's eyes through the lens assembly.

[0070] FIGS. 3 and 4 are drawings showing the front and back of a wearable electronic device (300) according to one embodiment.

[0071] Referring to FIGS. 3 and 4, in one embodiment, camera modules (311, 312, 313, 314, 315, 316) and / or a depth sensor (317) for obtaining information related to the surrounding environment of the wearable electronic device (300) may be arranged on a first surface (310) of the wearable electronic device (300) (e.g., a housing). In one embodiment, the camera modules (311, 312, 313, 314, 315, 316) provided as imaging devices may be implemented by a combination of a lens assembly (LA) and an image sensor (I) of FIGS. 5, 9, and / or 13. In one embodiment, the lens assembly (LA) of FIGS. 5, 9, and / or 13 may provide different specifications or performances than the lens assembly of FIG. 2.

[0072] In one embodiment, the camera modules (311, 312) can acquire images related to the surrounding environment of the wearable electronic device (300). For example, the camera modules (311, 312) can acquire subject images or track or monitor subjects by including the lens assembly (LA) and image sensor (I) of FIG. 5, FIG. 9, and / or FIG. 13.

[0073] In one embodiment, the camera modules (313, 314, 315, 316) can acquire images of the surrounding environment or objects while the wearable electronic device (300) is worn by the user. The camera modules (313, 314, 315, 316) can be used for hand detection, tracking, and recognition of user gestures (e.g., hand movements). For example, the camera modules (313, 314, 315, 316) can detect movement or motion of the user's body, including the user's hand, in the current facing direction. The camera modules (313, 314, 315, 316) can be used for 3DoF (degrees of freedom), 6DoF head tracking, position (spatial, environmental) recognition, and / or movement recognition. In one embodiment, camera modules (311, 312) may be used for hand detection and tracking or to recognize or detect user gestures.

[0074] In one embodiment, the depth sensor (317) may be configured to transmit a signal and receive a signal reflected from a subject, and may be used for purposes such as time of flight (TOF) to determine the distance to an object. Instead of or in addition to the depth sensor (317), camera modules (313, 314, 315, 316) may determine the distance to an object.

[0075] According to one embodiment, a camera module (325, 326) for facial recognition and / or a display (331) (and / or a lens) may be disposed on the second side (320) of the housing.

[0076] In one embodiment, a face recognition camera module (325, 326) adjacent to the display may be used to recognize a user's face, or may recognize and / or track both eyes of the user.

[0077] In one embodiment, the display (331) (and / or lens) may be disposed on the second side (320) of the wearable electronic device (300). In one embodiment, the display (331) (and / or lens) may be at least partially similar to, or substantially identical to, the display (D) (and / or lenses L1, L2, L3, L4) of FIG. 2. In one embodiment, the wearable electronic device (300) may not include the camera modules (315, 316) among the plurality of camera modules (313, 314, 315, 316). Although not illustrated in FIGS. 3 and 4 , the wearable electronic device (300) may further include at least one of the configurations illustrated in FIGS. 1 and / or 2 .

[0078] In one embodiment, the display (331) may be understood to include a display module (e.g., the display module (160) of FIG. 1) that outputs a screen, and a lens assembly that focuses the output screen onto the user's eyes. In FIG. 4, it is noted that reference numerals are assigned to portions of the structure of the display (331) that are visible from the exterior of the wearable electronic device (300), indicating the lens closest to the user's eyes.

[0079] As described above, according to one embodiment, the wearable electronic device (300) may have a form factor for being worn on a user's head. The wearable electronic device (300) may further include a strap and / or a wearing member for being secured to a body part of the user. The wearable electronic device (300) may provide a user experience based on augmented reality, virtual reality, and / or mixed reality while being worn on the user's head.

[0080] According to one embodiment, at least one of the camera modules (180) of FIG. 1 and / or the camera modules (311, 312, 313, 314, 315, 316) of FIGS. 3 and 4 may be implemented by the imaging device (400, 500, 600) of FIGS. 5, 9 and / or 13, which will be described later. For example, an electronic device (e.g., the electronic device (101) of FIG. 1 and / or the wearable electronic device (300) of FIGS. 3 and 4) may include the imaging device (400, 500, 600) of FIGS. 5, 9 and / or 13, thereby acquiring an image of a current surrounding environment or object and / or tracking a user's body (e.g., hand detection, tracking, and / or recognizing a user's gesture (e.g., hand movement)). Electronic devices worn on the face, such as the wearable electronic device (300) of FIGS. 3 and 4, can utilize multiple cameras to detect objects or the user's body in the user's field of view. When the cameras and / or imaging devices have wide-angle / ultra-wide-angle characteristics, the number of cameras required to track surrounding objects or the user's body can be reduced, facilitating weight reduction of the wearable electronic device.

[0081] The imaging device (400, 500, 600) according to the embodiment(s) of the present disclosure may be useful in reducing the number of cameras required to track surrounding objects or a user's body by having wide-angle / ultra-wide-angle characteristics. For example, the imaging device (400, 500, 600) may contribute to reducing the weight of a wearable electronic device (300). In one embodiment, the imaging device (400, 500, 600) may have a reduced external size (e.g., an outer diameter of a first lens) by satisfying at least one of the conditions described below. For example, the imaging device (400, 500, 600) may be easily mounted on a miniaturized and / or lightweight wearable electronic device (300). In one embodiment, the imaging device (400, 500, 600) may suppress performance deviation due to temperature change by satisfying at least one of the conditions described below, thereby providing a stable photographing function and / or a user's body tracking function. In one embodiment, the imaging device (400, 500, 600) described below may implement at least one of the camera modules (180, 311, 312, 313, 314, 315, 316, 325, 326) described above.

[0082] FIG. 5 is a diagram illustrating an imaging device (400) or a lens assembly (LA) according to an embodiment of the present disclosure. FIG. 6 is a graph illustrating spherical aberration of the imaging device (400) or the lens assembly (LA) of FIG. 5 according to an embodiment of the present disclosure. FIG. 7 is a graph illustrating astigmatism of the imaging device (400) or the lens assembly (LA) of FIG. 5 according to an embodiment of the present disclosure. FIG. 8 is a graph illustrating a distortion rate of the imaging device (400) or the lens assembly (LA) of FIG. 5 according to an embodiment of the present disclosure.

[0083] FIG. 6 is a graph showing spherical aberration of an imaging device (400) or a lens assembly (LA) according to one embodiment of the present disclosure, in which the horizontal axis represents a coefficient of longitudinal spherical aberration, the vertical axis represents a normalized distance from the optical axis, and the change in longitudinal spherical aberration according to the wavelength of light is shown. The longitudinal spherical aberration is shown for at least one of light having a wavelength of, for example, 870.00 (NM, nanometer), 850.00 (NM), 830.00 (NM), 656.27 (NM) (e.g., red), 587.56 (NM) (e.g., yellow), 546.07 (NM), 486.13 (NM) (e.g., blue), and 435.83 (NM). FIG. 7 is a graph showing astigmatism of an imaging device (400) or a lens assembly (LA) according to one embodiment of the present disclosure, for light having a wavelength of 546.07 (NM), where 'S' exemplifies a sagittal plane with a solid line and 'T' exemplifies a tangential plane (or meridional plane) with a dotted line. FIG. 8 is a graph showing a distortion rate of an imaging device (400) or a lens assembly (LA) according to one embodiment of the present disclosure, for light having a wavelength of 546.07 (NM). The refractive index of the lens(es) mentioned in the embodiments described below may refer to the refractive index for light having a wavelength of approximately 587.56 (NM).

[0084] According to one embodiment, the vertical axis, the image height (IMG HT) of FIGS. 7 and 8 may be an example of a distance measured diagonally (or radially) from a point intersecting the optical axis (O) on the image sensor (I) (e.g., the imaging plane (IS)). In one embodiment, the vertical axis, the image height (IMG HT) of FIGS. 7 and 8 may be replaced with a value relating to the field of view, in which case the field of view corresponding to an image height of 1.51 mm may be approximately 75 degrees. Those skilled in the art will readily understand that the imaging device and / or lens assembly of the disclosed embodiment can provide wide-angle / ultra-wide-angle performance such as a fish-eye lens when viewed in the graphs relating to spherical aberration, astigmatism, and distortion of the embodiments described below.

[0085] In the embodiment described below, the first lens (L1) may be referred to as “the first lens on the object (S) side” or “the lens arranged furthest from the image sensor (I).” The ordinal numbers “first,” “second,” ..., “sixth” given to the lenses (L1, L2, L3, L4, L5, L6) may be sequentially assigned in the order of proximity to the image sensor (I) from the lens arranged furthest from the image sensor (I). In one embodiment, “aligned along the optical axis (O) direction” may refer to the optical axes (O) of the respective lenses (L1, L2, L3, L4, L5, L6) being aligned to coincide with each other. The image sensor (I), for example, the imaging plane (img), may receive or detect light aligned, focused, or guided by the lenses (L1, L2, L3, L4, L5, L6).

[0086] In one embodiment, a processor (e.g., processor (120) of FIG. 1) can perform a focus adjustment operation and / or a focal length adjustment operation by linearly moving at least one of the lenses (L1, L2, L3, L4, L5, L6) along the optical axis (O) with respect to the image sensor (I). In one embodiment, the processor (e.g., processor (120) of FIG. 1) can perform an image stabilization operation by horizontally moving at least one of the lenses (L1, L2, L3, L4, L5, L6) in a plane substantially perpendicular to the optical axis (O). In one embodiment, such focus adjustment operation, focal length adjustment operation, and / or image stabilization operation can be performed by the processor (e.g., processor (120) of FIG. 1) moving the image sensor (I). In one embodiment, a processor (e.g., processor (120) of FIG. 1) may perform a focus adjustment operation, a focal length adjustment operation, and / or a shake correction operation by combining movement of at least one of lenses (L1, L2, L3, L4, L5, L6) and movement of an image sensor (I). In one embodiment, when an imaging device (400) and / or an electronic device (e.g., a wearable electronic device (300) of FIG. 3) is worn on a user's body, the processor (e.g., processor (120) of FIG. 1) may perform a body tracking function including a user's hand using the imaging device (400). The operation of the processor (120) described above may be implemented through an electronic device (e.g., wearable electronic device (300) of FIGS. 3 and 4) by executing command(s) stored in a memory (e.g., memory (130) of FIG. 1).

[0087] In the embodiment(s) described below, even if some of the reference numbers (e.g., S1 to S15) given in the drawings with respect to the surfaces of the lens surfaces and / or the filter (F) are not directly mentioned, those skilled in the art will be able to easily understand the configuration of each lens (L1, L2, L3, L4, L5, L6) or the lens surfaces based on the lens data presented through the [Tables] described below. In examining the embodiment(s) below, for the sake of brevity of the drawings, the reference numbers in the drawings for some of the object-side surface(s) and the sensor-side surface(s) of the lenses (L1, L2, L3, L4, L5, L6) may be omitted. The reference numbers for the lens surfaces omitted in the drawings may apply to the configurations of different embodiments, and the lens data of each embodiment will be easily understood through the [Tables] described below.

[0088] In the detailed description of the embodiments of the present disclosure, the term "concave" or "convex" with respect to the object-side surface or the sensor-side surface of the lenses (L1, L2, L3, L4, L5, L6) may refer to the shape of the lens surface at a point intersecting the optical axis (O) or in a paraxial region intersecting the optical axis (O). The shape referred to as "concave" may refer to a shape in which the lens surface forms a curved surface in such a way that the lens thickness decreases as it approaches the optical axis (O) in the paraxial region. The shape referred to as "convex" may refer to a shape in which the lens surface forms a curved surface in such a way that the lens thickness increases as it approaches the optical axis (O) in the paraxial region.

[0089] Referring to FIGS. 5 to 8, the imaging device (400) and / or the lens assembly (LA) can be miniaturized and implement wide-angle / ultra-wide-angle performance, and / or suppress deviation of optical performance due to temperature change, by satisfying at least some of the conditions described below, and / or including at least one lens (e.g., the fourth lens (L4)) that satisfies the conditions regarding refractive index and Abbe number described below. In the illustrated embodiment, the imaging device (400) and / or the lens assembly (LA) can include six or fewer lenses (L1, L2, L3, L4, L5, L6)(s) sequentially arranged along the optical axis (O). The lenses (L1, L2, L3, L4, L5, L6) and / or the lens assembly (LA) may be configured to focus or guide light incident along the optical axis (O), for example, and the imaging device (400) may include an image sensor (I) configured to receive the light focused or guided by the lens assembly (LA). The light received by the image sensor (I) may include information about an image of a subject, such as, for example, a surrounding object or a user's body, and / or information about movement of the subject.

[0090] In the illustrated embodiment, the lens assembly (LA) may include six lenses (L1, L2, L3, L4, L5, L6). For example, the lenses (L1, L2, L3, L4, L5, L6) of the lens assembly (LA) may include a first lens (L1) positioned furthest from the image sensor (I), a second lens (L2) positioned between the first lens (L1) and the image sensor (I), a third lens (L3) positioned between the second lens (L2) and the image sensor (I), a fourth lens (L4) positioned between the third lens (L3) and the image sensor (I), a fifth lens (L5) positioned between the fourth lens (L4) and the image sensor (I), and a sixth lens (L6) positioned between the fifth lens (L5) and the image sensor (I). In one embodiment, the wide-angle / ultra-wide-angle performance of the lens assembly (LA) can be easily implemented by having the negative refractive power of the first lens (L1).

[0091] According to one embodiment, a first lens (L1) having negative refractive power and a second lens (L2) having a concave object-side surface (S3) are combined to reduce the angle of view of the lens assembly (LA). In one embodiment, the second lens (L2) may have positive refractive power or negative refractive power. Here, the “angle of view of the lens assembly (LA)” may be understood as an outer diameter of the first lens (LA) visually visible from the exterior of the imaging device (400) and / or the wearable electronic device (300). In one embodiment, when a first lens (LA) having negative refractive power and a second lens (L2) having a concave object-side surface (S3) are combined, the wide-angle / ultra-wide-angle performance of the lens assembly (LA) can be implemented while reducing the diameter of the lens assembly (LA). In describing the embodiment(s) of the present disclosure, the phrase “the object-side surface (S3) is concave” with respect to the shape of the second lens (L2) combined with the first lens (L1) having negative refractive power may refer to the shape of the object-side surface (S3) at the periphery of the second lens (L2), and the object-side surface (S3) at the center of the second lens (L2) may be concave or convex. Here, the “center of the lens” may refer to a portion of the lens through which the optical axis (O) passes, and the “periphery of the lens” may refer to a region that is arranged around the center of the lens and provides an edge of the lens. In one embodiment, the “center of the lens” may refer to a very narrow region through which the optical axis (O) of the lens passes, or substantially the apex of the lens.

[0092] According to one embodiment, in the configuration of the first lens (L1) and the second lens (L2) as described above, when the fourth lens (L4) has positive refractive power and the fifth lens (L5) has negative refractive power, spherical aberration or chromatic aberration of the lens assembly (LA) can be easily corrected and the resolution can be improved. For example, by combining the first lens (L1) with negative refractive power, the second lens (L2) whose object-side surface (S3) is concave at least in the periphery, the fourth lens (L4) with positive refractive power, and the fifth lens (L5) with negative refractive power, the lens assembly (LA) can be miniaturized and / or provide good resolution while providing wide-angle / ultra-wide-angle performance. In one embodiment, the fourth lens (L4) with positive refractive power and the fifth lens (L5) with negative refractive power can be easily corrected for spherical aberration or chromatic aberration.

[0093] In one embodiment, the lenses (L1, L2, L3, L4, L5, L6)(s) may expand or contract depending on temperature changes. Such deformation of the lenses (L1, L2, L3, L4, L5, L6)(s) may cause focus distortion in the lens assembly (LA). For example, the performance of the lens assembly (LA) may vary depending on the ambient environment (e.g., temperature). When the lens assembly (LA) is combined with a high-performance / large-sized image sensor (e.g., the image sensor (I) of FIG. 5) having high pixels (e.g., 50 M pixels or more), such focus distortion and / or performance variation may be aggravated. In the embodiment(s) of the present disclosure, at least one of the lenses (L1, L2, L3, L4, L5, L6) is made of a material having a small coefficient of thermal expansion according to temperature change, and / or the refractive power of the corresponding lens(es) is appropriately set, thereby suppressing distortion of the performance of the lens assembly (LA) due to the surrounding environment. In one embodiment, the lens assembly (LA) can suppress optical performance deviation according to temperature change by using the material and refractive power of at least the fourth lens (L4) among the lenses (L1, L2, L3, L4, L5, L6). When at least one lens made of a material having a small coefficient of thermal expansion is included, the degree of design freedom in selecting materials for the remaining lenses of the lens assembly (LA) can be increased. In one embodiment, when at least one of the lenses (L1, L2, L3, L4, L5, L6) (e.g., the fourth lens (L4)) is made of glass, the remaining lenses can be made of plastic lenses.

[0094] According to one embodiment, the third lens (L3) may have positive refractive power or negative refractive power, and may have a shape that sets a focal length suitable for a wide-angle / ultra-wide-angle characteristic implemented by the combination of the first lens (L1) and the second lens (L1). In one embodiment, the focal length of the lens assembly (LA) may be more easily set through the combination of the third lens (L3) and the fourth lens (L4). In one embodiment, the fourth lens (L4) may have positive refractive power and may be a lens with a low coefficient of thermal expansion. For example, among the lenses (L1, L2, L3, L4, L5, and L6), at least the fourth lens (L4) may be made of glass. In one embodiment, the fourth lens (L4) may have refractive power of a specified specification with the lens assembly (LA), thereby further suppressing performance deviation of the lens assembly (LA) due to temperature change. As for the refractive power of the fourth lens (L4), we will examine it again through [Conditional Expression 3] described later.

[0095] According to one embodiment, the fifth lens (L5) has a negative refractive power to facilitate chromatic aberration correction, and can be combined with the fourth lens (L4) as described above to provide a resolution matching the wide-angle / ultra-wide-angle performance implemented by the first lens (L1) and the second lens (L2). In one embodiment, the sixth lens (L6) can have a meniscus shape that is convex toward the object side. In one embodiment, the sixth lens (L6) can include inflection points (IP)(s) on at least one of the object-side surface (S12) and the sensor-side surface (S13). When the sixth lens (L6) has a meniscus shape and / or includes inflection points (IP)(s), the sixth lens (L6) can lower a chief ray angle (CRA) and suppress field curvature or distortion, thereby implementing good optical performance.

[0096] In one embodiment, the imaging device (400) and / or the lens assembly (LA) may include a filter (F) (e.g., an infrared cutoff filter) disposed between the sixth lens (L6) and the image sensor (I). In one embodiment, the filter (F) may substantially block light (e.g., infrared) of a wavelength that is not perceptible to the naked eye of a user but is detected by the photosensitive material or the image sensor (I). For example, by substantially blocking light of a wavelength that is not perceptible to the naked eye of a user from reaching the image sensor (I), the filter (F) may improve the quality of an image acquired through the image sensor (I).

[0097] In one embodiment, the imaging device (400) and / or the lens assembly (LA) may include an aperture (Stop) positioned further from the image sensor (I) than the third lens (L3). For example, the aperture (Stop) may be positioned between the first lens (L1) and the third lens (L3). This positioning of the aperture (Stop) may be useful for lowering the F-number of the lens assembly (LA). In one embodiment, the phrase "the aperture (Stop) is positioned between the first lens (L1) and the third lens (L3)" may be understood to include a configuration in which the aperture (Stop) is positioned on either the sensor-side surface (S2) of the first lens (L1) or the object-side surface (S6) of the third lens (L3). In the illustrated embodiment, the aperture (Stop) may be positioned between the second lens (L2) and the third lens (L3). In one embodiment, when the aperture (Stop) is positioned further from the image sensor (I) than the third lens (L3), the angle of view of the lens assembly (LA) may be increased, which may be useful in reducing the field of view of the lens assembly (LA). For example, by positioning the aperture (Stop) further from the image sensor (I) than the third lens (L3), the lens assembly (LA) can be miniaturized while providing an angle of view performance that matches the range of a user's field of view.

[0098] According to one embodiment, the above-described imaging device (400) and / or lens assembly (LA) can satisfy the conditions presented through the following [Conditional Expression 1] and / or [Conditional Expression 2].

[0099] [Condition 1]

[0100]

[0101] [Condition 2]

[0102]

[0103] Here, 'f' is the focal length of the lens assembly (LA), 'Fno' is the F-number of the lens assembly (LA), 'R21' may be the radius of curvature of the object-side surface (S3) of the second lens (L2), and 'R12' may be the radius of curvature of the sensor-side surface (S2) of the first lens (L1). The focal length and the radius of curvature are in 'mm' units, and the radius of curvature may be measured at the point where the optical axis (O) intersects the lens surface.

[0104] [Conditional Expression 1] may suggest a configuration of a lens assembly (LA) having, for example, wide-angle / ultra-wide-angle performance and good brightness. In one embodiment, when the output value of [Conditional Expression 1] is less than the lower limit, it may be difficult for the lens assembly (LA) to have good brightness, and when it is greater than the upper limit, it may be difficult to implement the wide-angle / ultra-wide-angle performance. In one embodiment, [Conditional Expression 2] may suggest a condition for implementing the wide-angle / ultra-wide-angle performance of the lens assembly (LA). In one embodiment, when the output value of [Conditional Expression 2] is less than the lower limit, the angle of view may be reduced, but the overall size of the lens assembly (LA) may be reduced, which may cause difficulties in optical performance or manufacturing. In one embodiment, when the output value of [Conditional Expression 2] is greater than the upper limit, manufacturing may be facilitated, but it may be difficult to implement the wide-angle / ultra-wide-angle performance.

[0105] According to one embodiment, at least one of the lenses (L1, L2, L3, L4, L5, L6) can satisfy the conditions presented by the following [Conditional Expression 3], [Conditional Expression 4] and / or [Conditional Expression 5].

[0106] [Condition 3]

[0107]

[0108] [Conditional Expression 4]

[0109]

[0110] [Condition 5]

[0111]

[0112] In one embodiment, at least one of the lenses (L1, L2, L3, L4, L5, L6) (e.g., the fourth lens (L4)) may satisfy [Conditional Expression 3], [Conditional Expression 4], and / or [Conditional Expression 5]. [Conditional Expression 3] presents a condition regarding the refractive power of the lens(es) to suppress performance deviation due to temperature change, and when the focal length 'GL_f' of at least one of the lenses (L1, L2, L3, L4, L5, L6) (e.g., the fourth lens (L4)) satisfies a range of approximately 0.5 times or more and 2.0 times or less than the focal length 'f' of the lens assembly (LA), the performance deviation of the lens assembly (LA) due to temperature change can be suppressed. For example, when at least one of the lenses (L1, L2, L3, L4, L5, L6) (e.g., the fourth lens (L4)) satisfies the condition presented through [Conditional Expression 3], the lens assembly (LA) can substantially maintain performance that meets the design specifications even if the remaining lenses (L1, L2, L3, L5, L6)(s) expand or contract. In one embodiment, [Conditional Expression 4] and / or [Conditional Expression 5] present conditions regarding the refractive index 'GL_Nd' and the Abbe number 'GL_Vd' of the lenses (L1, L2, L3, L4, L5, L6)(s) to suppress performance deviation due to temperature change. For example, when at least one of the lenses (L1, L2, L3, L4, L5, L6) (e.g., the fourth lens (L4)) satisfies [Conditional Expression 4] and / or [Conditional Expression 5], performance deviation of the lens assembly (LA) due to temperature change can be suppressed. In one embodiment, the lens satisfying [Conditional Expression 4] and / or [Conditional Expression 5] can be made of a glass material.

[0113] According to one embodiment, the lens assembly (LA) can satisfy the following [Conditional Expression 6] regarding the field of view ‘FOV’.

[0114] [Condition 6]

[0115]

[0116] For example, the lens assembly (LA) may be easily mounted on the wearable electronic device (300) of FIG. 3 by satisfying [Conditional Expression 6] to implement wide-angle / ultra-wide-angle performance and / or by satisfying at least some of the conditions described above or below. In one embodiment, since the imaging device (400) and / or the lens assembly (LA) implement wide-angle / ultra-wide-angle performance, acquisition of subject images or user body tracking functions may be easily implemented even when a small number of cameras are used in the wearable electronic device (300). In one embodiment, the lens assembly (LA) may have an angle of view of approximately 145 degrees or more and approximately 165 degrees or less.

[0117] According to one embodiment, the lens assembly (LA) can satisfy the following [Conditional Expression 7] regarding the thickness 'T1' of the first lens (L1) and the thickness 'T2' of the second lens (L2). The thickness of the lens(es) can be measured, for example, in the optical (O) axis and can be in the unit of 'mm'.

[0118] [Condition 7]

[0119]

[0120] In one embodiment, when the output value of [Conditional Expression 7] becomes smaller than the lower limit, the thickness of the first lens (L1) becomes excessively small, which may make it easily damaged by external force or impact, and when it becomes larger than the upper limit, the thickness of the second lens (L2) becomes small, which may make it difficult to secure good performance (e.g., wide-angle / ultra-wide-angle performance). For example, [Conditional Expression 7] can be understood as presenting conditions regarding the mass production of the first lens (L1) and the second lens (L2) and the performance of the lens assembly (LA).

[0121] According to one embodiment, at least one of the lenses (L1, L2, L3, L4, L5, L6) (e.g., the fourth lens (L4)) can easily correct aberrations and achieve good resolution by satisfying [Conditional Expression 8]. For example, at least one of the lenses (L1, L2, L3, L4, L5, L6) can secure the resolution of the lens assembly (LA) while having good defined refractive power by satisfying [Conditional Expression 8] regarding the radius of curvature 'GL_R1' of the object-side surface and the radius of curvature 'GL_R2' of the sensor-side surface, and can suppress performance deviation of the lens assembly (LA) due to temperature change.

[0122] [Condition 8]

[0123]

[0124] According to one embodiment, the lens(es) satisfying [Conditional Expression 3], [Conditional Expression 4], [Conditional Expression 5], and / or [Conditional Expression 8] may have a convex object-side surface and a convex sensor-side surface. The biconvex shape of the lens(es) may, for example, enable the lens(es) to have good refractive power and facilitate the arrangement of refractive power throughout the lens assembly. In one embodiment, the biconvex shape of the lens(es) may facilitate the control of chromatic aberration or spherical aberration, thereby providing an environment in which good resolution can be secured. In one embodiment, at least one of the lenses (L1, L2, L3, L4, L5, L6) (e.g., the fourth lens (L4)) may satisfy [Conditional Expression 3], [Conditional Expression 4], [Conditional Expression 5], and / or [Conditional Expression 8].

[0125] According to one embodiment, in the above-described lens assembly (LA), the fourth lens (L4) and the fifth lens (L5) can satisfy the following [Conditional Expression 9]. [Conditional Expression 9] relates to, for example, a radius of curvature 'R42' of a sensor-side surface (S9) of the fourth lens (L4) and a radius of curvature 'R51' of an object-side surface (S10) of the fifth lens (L5), and when the lens assembly (LA) satisfies [Conditional Expression 9] regarding the fourth lens (L4) and the fifth lens (L5), chromatic aberration control can be facilitated.

[0126] [Conditional Expression 9]

[0127]

[0128] According to one embodiment, the lens assembly (LA) can satisfy [Conditional Expression 10] regarding the shape angle 'Ang_R1' of the object-side surface (S1) of the first lens (L1). In describing the shape of the lenses (L1, L2, L3, L4, L5, L6)(s), the 'shape angle of the XX surface' can be defined as the inclination angle of the XX surface with respect to a plane (OP) perpendicular to the optical axis (O). In one embodiment, the 'shape angle of the XX surface' can refer to the inclination angle of the tangent (TL)(s) passing through the optical axis (O) among the tangents (TL) of the XX surface, with respect to the plane (OP) perpendicular to the optical axis (O).

[0129] [Condition 10]

[0130]

[0131] In one embodiment, when the first lens (L1) implements ultra-wide-angle performance through the conditions described above, the angle of view may be reduced by including inflection point(s) that are not assigned reference numbers. However, when the shape angle of the first lens (L1) becomes smaller than the lower limit of [Conditional Expression 10], the overall length of the lens assembly (LA) and / or the imaging device (400) may become longer, making it difficult to mount it in a miniaturized electronic device (e.g., the wearable electronic device (300) of FIG. 3). In one embodiment, when the shape angle of the first lens (L1) becomes larger than the upper limit of [Conditional Expression 10], the angle of view may be increased, and in this case, it may be difficult to mount it in a miniaturized electronic device (e.g., the wearable electronic device (300) of FIG. 3).

[0132] In one embodiment, the imaging device (400) and / or the lens assembly (LA) can have a focal length of approximately 1.07 mm, an F-number of approximately 1.8, and an angle of view of approximately 150 degrees. In one embodiment, the imaging device (400) and / or the lens assembly (LA) can satisfy at least some of the conditions described above, as mentioned above. In one embodiment, the refractive power and / or material of at least the fourth lens (L4) among the lenses (L1, L2, L3, L4, L5, L6) can be configured so that the imaging device (400) and / or the lens assembly (LA) can implement optical performance that meets the design specifications even when the operating environment (e.g., temperature) changes. In one embodiment, the imaging device (400) and / or the lens assembly (LA) can be manufactured with the specifications exemplified in the following [Table 1]. In [Table 1] regarding lens data, aspherical surfaces may be indicated with the symbol '*'.

[0133] Lens surface (surface) curvature radius (radius) thickness (thickness) effective radius (half aperture)Focal length (EFL)Refractive index (Nd)Abbe number (Vd)S0infinity300S1*-15.5490.6743.197-2.4011.5350055.75S2*1.4281.3081.510S3*-30.0202.2251.000-12367.0511.6707419.23S4*-31.0310.1460.731Stopinfinity0.0300.695S6*8.1310.4900.7013.3491.5440155.91S7*-2.3100.0200.80 3S8*1.7071.0000.9321.7621.5891561.14S9*-2.0940.0320.921S10* -1.5960.3250.907-1.6851.6607420.37S11*4.1380.1160.914S12*1.2 020.4331.026.5881.5440155.91S13*1.5750.3001.132S14infinity0.1101.2141.51764.2S15infinity0.6701.241imginfinity0.0011.508

[0134] According to one embodiment, at least some of the lens surfaces of the lenses (L1, L2, L3, L4, L5, L6) may be aspherical, and the aspherical coefficients of the lens surfaces are described in [Table 2], [Table 3], and [Table 4] below. In one embodiment, the definition of aspherical surface can be calculated through the following [Conditional Expression 11].

[0135] [Condition 11]

[0136]

[0137] In [Conditional Expression 11], “x” is the distance in the direction of the optical axis (O) from the point where the optical axis (O) passes on the lens surface, “y” is the distance from the optical axis (O) in the vertical direction from the optical axis (O), ‘R’ represents the radius of curvature at the vertex of the lens, ‘K’ represents the conic constant, and ‘Ai’ represents the aspherical coefficient.

[0138] S1S2S3S4곡률반경-1.555E+011.428E+00-3.002E+01-3.103E+01K-4.592E+01-8.321E-019.900E+019.900E+01A46.747E-033.794E-028.262E-04-9.745E-03A6-3.835E-03-1.079E-01-9.438E-01-1.524E+00A84.429E-031.756E-017.138E+002.341E+01A10-2.670E-033.789E-01-3.425E+01-2.216E+02A129.883E-04-2.591E+001.104E+021.436E+03A14-2.455E-046.469E+00-2.485E+02-6.660E+03A164.247E-05-9.570E+004.001E+022.268E+04A18-5.162E-069.227E+00-4.660E+02-5.724E+04A204.360E-07-5.954E+003.933E+021.066E+05A22-2.474E-082.554E+00-2.380E+02-1.443E+05A248.782E-10-6.995E-011.006E+021.374E+05A26-1.680E-111.107E-01-2.817E+01-8.684E+04A281.157E-13-7.696E-034.694E+003.262E+04A300.000E+000.000E+00-3.521E-01-5.495E+03

[0139] S6S7S8S9곡률반경8.131E+00-2.310E+001.707E+00-2.094E+00K-7.240E+013.817E+008.888E-021.219E-02A4-1.331E-01-5.175E-02-4.461E-021.994E-02A66.582E-01-5.094E-02-6.406E-03-1.393E-03A8-9.776E+004.597E-011.725E-026.141E-04A106.856E+01-5.708E+001.588E-048.482E-03A12-2.869E+022.633E+01-7.472E-051.837E-05A147.301E+02-6.431E+014.863E-061.138E-06A16-1.111E+038.779E+01-8.688E-07-2.434E-07A189.293E+02-6.335E+010.000E+000.000E+00A20-3.298E+021.873E+010.000E+000.000E+00A220.000E+000.000E+00A240.000E+000.000E+00A260.000E+000.000E+00A280.000E+000.000E+00A300.000E+000.000E+00

[0140] S10S11S12S13Curvature Radius-1.596E+004.138E+001.202E+001.575E+00K-1.055E+011.421E+01-9.269E+00-8.081E+00A41.518E-011.139E-01-1.032E-01-1.624E-01A6-4.708E-019.141E-012.456E-011.319E-01A87.961E-01-4.526E+00-6.481E-01-2.484E-02A10-1.286E+001.2 64E+011.155E+00-3.934E-01A121.640E+00-2.326E+01-1.138E+009.747E-01A14-1.334E+002.771E+014.223E-01-1.195E+00A165.64 8E-01-2.033E+012.221E-018.235E-01A18-8.572E-028.262E+00-2.505E-01-3.038E-01A200.000E+00-1.412E+006.232E-024.656E-02

[0141] FIG. 9 is a diagram illustrating an imaging device (500) or a lens assembly (LA) according to an embodiment of the present disclosure. FIG. 10 is a graph illustrating spherical aberration of the imaging device (500) or the lens assembly (LA) of FIG. 9 according to an embodiment of the present disclosure. FIG. 11 is a graph illustrating astigmatism of the imaging device (500) or the lens assembly (LA) of FIG. 9 according to an embodiment of the present disclosure. FIG. 12 is a graph illustrating a distortion rate of the imaging device (500) or the lens assembly (LA) of FIG. 9 according to an embodiment of the present disclosure.

[0142] The imaging device (500) and / or lens assembly (LA) of FIG. 9 can have a focal length of approximately 1.076 mm, an F-number of approximately 1.814, and an angle of view of approximately 158 degrees. In one embodiment, the imaging device (500) and / or lens assembly (LA) can satisfy at least some of the conditions described above, as mentioned above. In one embodiment, the refractive power and / or material of at least the fourth lens (L4) among the lenses (L1, L2, L3, L4, L5, L6) can be configured so that the imaging device (500) and / or lens assembly (LA) can implement optical performance that meets the design specifications even when the operating environment (e.g., temperature) changes. In one embodiment, the imaging device (500) and / or the lens assembly (LA) may be manufactured with the specifications exemplified in [Table 5] below, and may have aspheric coefficients of [Table 6], [Table 7], and [Table 8]. In [Table 5] regarding lens data, aspheric coefficients may be indicated with the symbol '*'.

[0143] Lens surface radius of curvature thickness half aperture focal length refractive index (Nd) Abbe number (Vd) S0 infinity 300 S1* -7.05 10.65 73.175 -2.05 21.54 40 155.91 S2* 1.37 71.01 81.320 S3* 35.50 21.61 71.20 97.51 01.65 92.52 0.49 S4* -5.72 40.64 80.95 4 Stop infinity 0.04 30.65 8 S6* -16.87 50.47 70.65 83.50 91.54 98 85 0.55 S7* -1.75 60.02 0.84 5 S8* 2.5431.0000.9411.7951.6168163.85S9*-1.6780.0201.009S10*-1.5 080.6570.958-1.8481.6606620.37S11*8.0230.0391.030S12*1.5420 .6111.08110.7961.5440155.91S13*1.7950.3001.222S14infinity0.1131.2881.51764.2S15infinity0.4751.314imginfinity0.0091.488

[0144] S1S2S3S4곡률반경-7.051E+001.377E+003.550E+01-5.724E+00K-5.068E+01-8.809E-01-9.900E+01-1.794E+01A47.303E-032.855E-02-9.958E-022.322E-02A6-3.817E-04-5.451E-035.648E-01-1.058E+00A85.859E-069.864E-03-4.749E+001.434E+01A101.037E-06-2.902E-032.484E+01-1.265E+02A12-1.136E-081.331E-03-8.804E+017.579E+02A14-4.481E-091.374E-042.198E+02-3.178E+03A162.171E-10-1.269E-04-3.948E+029.517E+03A180.000E+000.000E+005.156E+02-2.058E+04A200.000E+000.000E+00-4.896E+023.215E+04A223.342E+02-3.594E+04A24-1.597E+022.800E+04A265.066E+01-1.443E+04A28-9.579E+004.420E+03A308.170E-01-6.086E+02

[0145] S6S7S8S9곡률반경-1.688E+01-1.756E+002.543E+00-1.678E+00K9.900E+011.840E+001.728E+004.137E-01A4-7.915E-02-2.119E-02-5.281E-02-1.311E-02A6-1.597E-01-5.009E-02-1.859E-02-1.702E-03A84.605E-02-3.169E-021.510E-024.074E-03A10-2.465E-011.940E-02-2.785E-037.496E-03A129.408E-13-6.986E-10-4.188E-041.029E-04A149.733E-15-4.118E-113.729E-058.728E-06A164.912E-16-2.828E-12-9.114E-06-2.554E-06A180.000E+000.000E+000.000E+000.000E+00A200.000E+000.000E+000.000E+000.000E+00

[0146] S10S11S12S13곡률반경-1.508E+008.023E+001.542E+001.795E+00K-8.462E+003.872E+01-8.032E+00-7.983E+00A4-3.424E-021.718E-01-6.269E-02-9.759E-02A6-5.120E-02-5.699E-021.694E-023.495E-02A88.954E-03-7.937E-031.566E-02-1.424E-02A102.988E-036.328E-036.444E-042.303E-03A12-1.819E-04-1.015E-059.562E-06-4.550E-06A149.124E-05-1.611E-067.235E-07-2.125E-07A16-2.165E-063.760E-07-2.133E-079.010E-08A180.000E+000.000E+000.000E+000.000E+00A200.000E+000.000E+000.000E+000.000E+00

[0147] FIG. 13 is a diagram illustrating an imaging device (600) or a lens assembly (LA) according to an embodiment of the present disclosure. FIG. 14 is a graph illustrating spherical aberration of the imaging device (600) or the lens assembly (LA) of FIG. 13 according to an embodiment of the present disclosure. FIG. 15 is a graph illustrating astigmatism of the imaging device (600) or the lens assembly (LA) of FIG. 13 according to an embodiment of the present disclosure. FIG. 16 is a graph illustrating a distortion rate of the imaging device (600) or the lens assembly (LA) of FIG. 13 according to an embodiment of the present disclosure.

[0148] The imaging device (600) and / or lens assembly of FIG. 13 can have a focal length of approximately 1.073 mm, an F-number of approximately 1.75, and an angle of view of approximately 160 degrees. In one embodiment, the imaging device (600) and / or lens assembly (LA) can satisfy at least some of the conditions described above, as mentioned above. In one embodiment, the refractive power and / or material of at least the fourth lens (L4) among the lenses (L1, L2, L3, L4, L5, L6) can be configured so that the imaging device (600) and / or lens assembly (LA) can implement optical performance that meets the design specifications even when the operating environment (e.g., temperature) changes. In one embodiment, the imaging device (600) and / or the lens assembly (LA) may be manufactured with the specifications exemplified in [Table 9] below, and may have aspheric coefficients of [Table 10], [Table 11], and [Table 12]. In [Table 9] regarding lens data, aspheric coefficients may be indicated with the symbol '*'.

[0149] Lens surface radius of curvature thickness half aperture focal length refractive index Nd Abbe number Vd S0 infinity 300 S1* -9.49 90.6 193.400 -1.879 1.54 40 155.91 S2* 1.177 0.94 81.290 S3* 4.74 21.70 01.27 06.0 96 1.66 06 520.37 S4* -24.73 20.46 00.878 Stop infinity 0.03 60.630 S6* -18.77 80.52 60.63 03.19 41.54 40 85 5.93 S7* -1.61 20.02 0.809 S8* 2.1210.8500.9881.7981.6033863.79S9*-1.8990.0271.020S10*-1.3 920.6190.973-1.8081.6503521.52S11*9.5690.0201.000S12*1.3240 .5761.0596.8821.5440155.91S13*1.7290.3001.203S14infinity0.1101.2801.51764.2S15infinity0.4791.309imginfinity-0.0071.517

[0150] S1S2S3S4 Radius of curvature-9.499E+001.177E+004.742E+00-2.473E+01K-6.379E+01-9.528E-01-9.899E+019.900E+01A47.105E-032.325E-023. 714E-02-3.135E-02A6-3.157E-042.755E-02-1.148E-01-2.507E-03A8-2.339E-06-2.011E-026.136E-024.797E-03A101.778E-067.3 45E-03-1.676E-023.945E-03A12-2.177E-082.551E-034.096E-04-2.269E-13A14-9.664E-092.964E-046.527E-04-8.696E-15A165.2 69E-10-3.079E-049.562E-05-3.673E-16A180.000E+000.000E+000.000E+000.000E+00A200.000E+000.000E+000.000E+000.000E+00

[0151] S6S7S8S9곡률반경-1.878E+01-1.612E+002.121E+00-1.899E+00K9.900E+011.544E+001.636E+006.210E-01A4-8.360E-029.606E-03-5.988E-02-2.537E-02A6-1.948E-01-6.432E-02-3.531E-02-1.669E-02A81.515E-01-3.226E-025.869E-03-3.153E-03A10-3.789E-016.035E-02-4.073E-051.507E-02A121.803E-12-1.339E-09-8.025E-041.973E-04A142.099E-14-8.882E-118.043E-051.882E-05A161.192E-15-6.863E-12-2.212E-05-6.199E-06A180.000E+000.000E+000.000E+000.000E+00A200.000E+000.000E+000.000E+000.000E+00

[0152] S10S11S12S13곡률반경-1.392E+009.569E+001.324E+001.729E+00K-9.734E+006.558E+01-8.231E+00-1.174E+01A4-2.140E-021.847E-01-4.343E-02-6.133E-02A6-5.787E-02-5.139E-027.284E-037.497E-03A81.666E-02-8.651E-034.406E-03-8.951E-03A101.169E-03-1.183E-036.614E-033.281E-03A12-3.486E-04-1.945E-051.832E-05-8.719E-06A141.968E-04-3.474E-061.560E-06-4.583E-07A16-5.255E-069.128E-07-5.178E-072.187E-07A180.000E+000.000E+000.000E+000.000E+00A200.000E+000.000E+000.000E+000.000E+00

[0153] In the above-described imaging device (400, 500, 600) and / or lens assembly (LA), the output values ​​of the above-described [conditional expressions 1-10] are described in [Table 13] below. For example, the above-described imaging device (400, 500, 600) and / or lens assembly can satisfy at least some of the above-described conditions.

[0154] Example 9 of Fig. 5 Example 13 of Fig. 9 Conditional expression 10.65 0.64 0.66 Conditional expression 2 21.02 25.78 4.03 Conditional expression 3 1.63 1.67 1.67 Conditional expression 4 1.59 1.62 1.61 Conditional expression 5 61.14 63.80 63.80 Conditional expression 6 150.00 158.00 160.00 Conditional expression 7 0.30 0.4 10.36 Conditional expression 8 -0.8 1 -1.5 2 -1.12 Conditional expression 9 1.3 11.1 1.36 Conditional expression 10 -2 ~ 15 degrees -4 ~ 22 degrees -3 ~ 32 degrees

[0155] As described above, the imaging device (400, 500, 600) and / or the lens assembly (LA) according to the embodiment(s) of the present disclosure may be useful in reducing the number of cameras required to track surrounding objects or the user's body by having wide-angle / ultra-wide-angle characteristics. For example, the disclosed imaging device and / or lens assembly may contribute to weight reduction of a wearable electronic device. In one embodiment, the imaging device and / or the lens assembly may have a reduced external size (e.g., an outer diameter of the first lens) so that it may be easily mounted on a miniaturized and / or lightweight wearable electronic device. In one embodiment, the imaging device and / or the lens assembly may suppress performance deviation due to temperature change by satisfying at least one of the conditions described above. In one embodiment, when focus is distorted due to temperature change, the lens(es) and / or the image sensor may be moved in the optical axis direction to adjust focus or supplement resolution. According to the embodiment(s) of the present disclosure, the structure of the imaging device and / or lens assembly can be simplified because the deviation of optical performance due to temperature change is suppressed.

[0156] The effects that can be obtained from the present disclosure are not limited to the effects mentioned above, and other effects that are not mentioned can be clearly understood by a person having ordinary skill in the art to which the present disclosure pertains from the description of the above-described embodiment(s).

[0157] According to one embodiment of the present disclosure, an imaging device (e.g., camera modules (180, 311, 312, 313, 314, 315, 316) of FIGS. 1, 3, and 4, and / or imaging devices (400, 500, 600) of FIGS. 5, 9, and 13) may include a lens assembly (e.g., lens assembly (LA) of FIG. 5) configured to focus or guide light incident along an optical axis (e.g., optical axis (O) of FIG. 5)) sequentially arranged along the optical axis, and an image sensor (e.g., image sensor (I) of FIG. 5) configured to receive light focused or guided by the lens assembly. In one embodiment, the lenses may include a first lens (e.g., the first lens (L1) of FIG. 5) disposed farthest from the image sensor and having negative refractive power, a second lens (e.g., the second lens (L2) of FIG. 5) disposed between the first lens and the image sensor and having a concave periphery of an object-side surface (e.g., a surface indicated by 'S3' of FIG. 5), a third lens (e.g., the third lens (L3) of FIG. 5) disposed between the second lens and the image sensor and having positive or negative refractive power, a fourth lens (e.g., the fourth lens (L4) of FIG. 5) disposed between the third lens and the image sensor and having positive refractive power, a fifth lens (e.g., the fifth lens (L5) of FIG. 5) disposed between the fourth lens and the image sensor and having negative refractive power, and a sixth lens (e.g., the sixth lens (L6) of FIG. 5) disposed between the fifth lens and the image sensor and having positive or negative refractive power. In one embodiment, the lens assembly satisfies [condition 1; 0.3 <= f 2 / Fno <= 2.0] and / or [Conditional expression 2; 3 <= |R21 / R12| <= 30] can be satisfied. Here, 'f' is the focal length of the lens assembly, and the unit is 'mm', 'Fno' is the F-number of the lens assembly, 'R21' is the radius of curvature of the object-side surface of the second lens, and 'R12' is the radius of curvature of the sensor-side surface of the first lens (e.g., the surface indicated by 'S2' in FIG. 5), and the radius of curvature is in 'mm' and may be measured at a point intersecting the optical axis.

[0158] According to one embodiment, the imaging device and / or lens assembly as described above may further include an aperture stop (e.g., the aperture stop of FIG. 5) disposed between the first lens and the third lens.

[0159] In one embodiment, the aperture may be positioned between the second lens and the third lens.

[0160] According to one embodiment, at least one of the lenses may satisfy the following [Condition 3], [Condition 4], and [Condition 5].

[0161] [Condition 3]

[0162] 0.5 <= GL_f / f <= 2.0

[0163] [Conditional Expression 4]

[0164] 1.57 <= GL_Nd <= 2.1

[0165] [Condition 5]

[0166] 40 <= GL_Vd <= 82

[0167] Here, 'GL_f' may be the focal length of the lens satisfying [Conditional Expression 3], [Conditional Expression 4], and [Conditional Expression 5], 'GL_Nd' may be the refractive index of the lens satisfying [Conditional Expression 3], [Conditional Expression 4], and [Conditional Expression 5], and 'GL_Vd' may be the Abbe number of the lens satisfying [Conditional Expression 3], [Conditional Expression 4], and [Conditional Expression 5].

[0168] According to one embodiment, at least the fourth lens among the lenses can satisfy [Conditional Expression 3], [Conditional Expression 4], and [Conditional Expression 5].

[0169] According to one embodiment, the object-side surface and the sensor-side surface of the lens satisfying [Conditional Expression 3], [Conditional Expression 4], and [Conditional Expression 5] may have a convex shape.

[0170] According to one embodiment, the lens assembly can satisfy the following [Conditional Expression 6] regarding the field of view (FOV).

[0171] [Condition 6]

[0172] 120 degrees <= FOV

[0173] According to one embodiment, the lens assembly can satisfy the following [Conditional Expression 7] regarding the thickness of the first lens, 'T1', and the thickness of the second lens, 'T2'.

[0174] [Condition 7]

[0175] 0.2 <= T1 / T2 <= 0.8

[0176] Here, the thickness of the first lens and the thickness of the second lens are thicknesses measured from the optical axis, and the unit may be 'mm'.

[0177] According to one embodiment, at least one of the lenses may satisfy the following [Conditional Expression 8].

[0178] [Condition 8]

[0179] -2.5 <= GL_R1 / GL_R2 < 0

[0180] Here, 'GL_R1' is the object-side surface curvature radius of the lens that satisfies [Conditional Expression 8], 'GL_R2' is the sensor-side surface curvature radius of the lens that satisfies [Conditional Expression 8], and the curvature radius is in 'mm' units and may be measured at a point intersecting the optical axis.

[0181] According to one embodiment, at least the fourth lens among the lenses can satisfy [Conditional Expression 8].

[0182] According to one embodiment, the object-side surface and the sensor-side surface of the lens satisfying [Conditional Expression 8] may have a convex shape.

[0183] According to one embodiment, the lens assembly can satisfy the following [Conditional Expression 9].

[0184] [Conditional Expression 9]

[0185] 0.7 <= (R42 / R51) <= 1.5

[0186] Here, 'R42' is the radius of curvature of the sensor-side surface of the fourth lens (e.g., the surface indicated by 'S9' in FIG. 5), and 'R51' is the radius of curvature of the object-side surface of the fifth lens (e.g., the surface indicated by 'S10' in FIG. 5). The radius of curvature is in 'mm' units and may be measured at a point intersecting the optical axis.

[0187] According to one embodiment, the first lens can satisfy the following [Conditional Expression 10].

[0188] [Condition 10]

[0189] -8 degrees <= Ang_R1 <= 35 degrees

[0190] Here, 'Ang_R1' may be the shape angle of the object-side surface of the first lens (e.g., the surface indicated by 'S1' in FIG. 5).

[0191] According to one embodiment, the sixth lens may include at least one inflection point (e.g., inflection point (IP)(s) in FIG. 5) on the object-side surface (e.g., the surface indicated by 'S12' in FIG. 5) or the sensor-side surface (e.g., the surface indicated by 'S13' in FIG. 5).

[0192] According to one embodiment of the present disclosure, an imaging device (e.g., camera modules (180, 311, 312, 313, 314, 315, 316) of FIGS. 1, 3, and 4, and / or imaging devices (400, 500, 600) of FIGS. 5, 9, and 13) may include a lens assembly (e.g., lens assembly (LA) of FIG. 5) configured to focus or guide light incident along an optical axis (e.g., optical axis (O) of FIG. 5)) sequentially arranged along the optical axis, and an image sensor (e.g., image sensor (I) of FIG. 5) configured to receive light focused or guided by the lens assembly. In one embodiment, the lenses may include a first lens (e.g., the first lens (L1) of FIG. 5) disposed farthest from the image sensor and having negative refractive power, a second lens (e.g., the second lens (L2) of FIG. 5) disposed between the first lens and the image sensor and having a concave periphery of an object-side surface (e.g., a surface indicated by 'S3' of FIG. 5), a third lens (e.g., the third lens (L3) of FIG. 5) disposed between the second lens and the image sensor and having positive or negative refractive power, a fourth lens (e.g., the fourth lens (L4) of FIG. 5) disposed between the third lens and the image sensor and having positive refractive power, a fifth lens (e.g., the fifth lens (L5) of FIG. 5) disposed between the fourth lens and the image sensor and having negative refractive power, and a sixth lens (e.g., the sixth lens (L6) of FIG. 5) disposed between the fifth lens and the image sensor and having positive or negative refractive power. In one embodiment, at least one of the lenses may satisfy the following [Condition 3], [Condition 4], and [Condition 5].

[0193] [Condition 3]

[0194] 0.5 <= GL_f / f <= 2.0

[0195] [Conditional Expression 4]

[0196] 1.57 <= GL_Nd <= 2.1

[0197] [Condition 5]

[0198] 40 <= GL_Vd <= 82

[0199] Here, 'GL_f' may be the focal length of the lens satisfying [Conditional Expression 3], [Conditional Expression 4], and [Conditional Expression 5], 'GL_Nd' may be the refractive index of the lens satisfying [Conditional Expression 3], [Conditional Expression 4], and [Conditional Expression 5], and 'GL_Vd' may be the Abbe number of the lens satisfying [Conditional Expression 3], [Conditional Expression 4], and [Conditional Expression 5].

[0200] According to one embodiment, at least the fourth lens among the lenses satisfies [Conditional Expression 3], [Conditional Expression 4], and [Conditional Expression 5], and the object-side surface (e.g., the surface indicated by 'S8' in FIG. 5) and the sensor-side surface (e.g., the surface indicated by 'S9' in FIG. 5) of the fourth lens may have a convex shape.

[0201] According to one embodiment, the fourth lens can satisfy the following [Conditional Expression 8].

[0202] [Condition 8]

[0203] -2.5 <= GL_R1 / GL_R2 < 0

[0204] Here, 'GL_R1' is the object-side surface curvature radius of the fourth lens, 'GL_R2' is the sensor-side surface curvature radius of the fourth lens, and the curvature radius is in 'mm' units and can be measured at a point intersecting the optical axis.

[0205] According to one embodiment, an aperture stop (e.g., the aperture stop of FIG. 5) may be further included between the second lens and the third lens.

[0206] According to one embodiment, the lens assembly can satisfy the following [Conditional Expression 7] regarding the thickness 'T1' of the first lens and the thickness 'T2' of the second lens.

[0207] [Condition 7]

[0208] 0.2 <= T1 / T2 <= 0.8

[0209] Here, the thickness of the first lens and the thickness of the second lens are thicknesses measured from the optical axis, and the unit may be 'mm'.

[0210] According to one embodiment of the present disclosure, an electronic device (e.g., electronic device (101) of FIG. 1 and / or wearable electronic device (300) of FIGS. 3 and 4) includes an imaging device (e.g., camera modules (180, 311, 312, 313, 314, 315, 316) of FIGS. 1, 3, and 4, and / or imaging devices (400, 500, 600) of FIGS. 5, 9, and 13), a memory (e.g., memory (130) of FIG. 1), and at least one processor (e.g., processor (120) of FIG. 1), wherein the memory may store instructions that, when executed by the at least one processor, cause the electronic device to obtain an image of a subject including a user's hand using the imaging device.

[0211] While this disclosure has been described by way of example and example, it should be understood that the example is intended to be illustrative and not limiting. It will be apparent to those skilled in the art that various changes in form and detail may be made without departing from the overall scope of this disclosure, including the appended claims and their equivalents.

Claims

In the imaging device (180; 311; 312; 313; 314; 315; 316; 400; 500; 600), A lens assembly (LA) comprising lenses (L1, L2, L3, L4, L5, L6) sequentially arranged along an optical axis (O) and configured to focus or guide light incident along the optical axis; and An image sensor (I) configured to receive light focused or guided by the lens assembly, The above lenses are, A first lens (L1) positioned farthest from the image sensor and having negative refractive power; A second lens (L2) disposed between the first lens and the image sensor and having a concave shape at the peripheral portion of the object-side surface; A third lens (L3) disposed between the second lens and the image sensor and having positive or negative refractive power; A fourth lens (L4) disposed between the third lens and the image sensor and having a defined refractive power; A fifth lens (L5) disposed between the fourth lens and the image sensor and having negative refractive power; and A sixth lens (L6) is disposed between the fifth lens and the image sensor and has positive or negative refractive power, An imaging device in which the above lens assembly satisfies the following [Conditional Expression 1] and [Conditional Expression 2]. [Condition 1] 0.3 <= f 2 / Fno <= 2.0 [Condition 2] 3 <= |R21 / R12| <= 30 (Here, 'f' is the focal length of the lens assembly, the unit is 'mm', 'Fno' is the F-number of the lens assembly, 'R21' is the radius of curvature of the object-side surface of the second lens, and 'R12' is the radius of curvature of the sensor-side surface of the first lens, the radius of curvature is in 'mm' and is measured at the point where it intersects the optical axis.) An imaging device further comprising an aperture stop (Stop) disposed between the first lens and the third lens in the first paragraph. In the second paragraph, the aperture is an imaging device arranged between the second lens and the third lens. An imaging device according to any one of claims 1 to 3, wherein at least one of the lenses satisfies the following [Conditional Expression 3], [Conditional Expression 4], and [Conditional Expression 5]. [Condition 3] 0.5 <= GL_f / f <= 2.0 [Conditional Expression 4] 1.57 <= GL_Nd <= 2.1 [Condition 5] 40 <= GL_Vd <= 82 (Here, 'GL_f' is the focal length of the lens satisfying [Condition 3], [Condition 4], and [Condition 5], 'GL_Nd' is the refractive index of the lens satisfying [Condition 3], [Condition 4], and [Condition 5], and 'GL_Vd' is the Abbe number of the lens satisfying [Condition 3], [Condition 4], and [Condition 5]) In the fourth paragraph, an imaging device in which at least the fourth lens among the lenses satisfies [Conditional Expression 3], [Conditional Expression 4], and [Conditional Expression 5]. An imaging device in which the object-side surface and the sensor-side surface of a lens satisfying [Conditional Expression 3], [Conditional Expression 4], and [Conditional Expression 5] in any one of the fourth and fifth clauses are convex in shape. An imaging device according to any one of claims 1 to 6, wherein the lens assembly satisfies the following [Conditional Expression 6] regarding the field of view (FOV). [Condition 6] 120 degrees <= FOV An imaging device according to any one of claims 1 to 7, wherein the lens assembly satisfies the following [Conditional Expression 7] regarding the thickness 'T1' of the first lens and the thickness 'T2' of the second lens. [Condition 7] 0.2 <= T1 / T2 <= 0.8 (Here, the thickness of the first lens and the thickness of the second lens are the thicknesses measured from the optical axis and the unit is 'mm') An imaging device according to any one of claims 1 to 8, wherein at least one of the lenses satisfies the following [Conditional Expression 8]. [Condition 8] -2.5 <= GL_R1 / GL_R2 < 0 (Here, 'GL_R1' is the object-side curvature radius of the lens that satisfies [Conditional Expression 8], and 'GL_R2' is the sensor-side curvature radius of the lens that satisfies [Conditional Expression 8]. The curvature radius is in 'mm' units and is measured at the point where it intersects the optical axis.) In the 9th paragraph, an imaging device in which at least the fourth lens among the lenses satisfies [Conditional Expression 8]. An imaging device in which the object-side surface and the sensor-side surface of a lens satisfying [Conditional Expression 8] are convex in any one of the 9th and 10th clauses. An imaging device according to any one of claims 1 to 11, wherein the lens assembly satisfies the following [Conditional Expression 9]. [Conditional Expression 9] 0.7 <= (R42 / R51) <= 1.5 (Here, 'R42' is the sensor-side surface curvature radius of the fourth lens, and 'R51' is the object-side surface curvature radius of the fifth lens. The curvature radius is in 'mm' units and is measured at the point where it intersects the optical axis.) An imaging device according to any one of claims 1 to 12, wherein the first lens satisfies the following [Conditional Expression 10]. [Condition 10] -8 degrees <= Ang_R1 <= 35 degrees (Here, 'Ang_R1' is the object-side surface shape angle of the first lens) An imaging device according to any one of claims 1 to 13, wherein the sixth lens includes at least one inflection point (IP) on the object-side surface or the sensor-side surface. In the electronic device (101; 300), An imaging device (180; 311; 312; 313; 314; 315; 316; 400; 500; 600) according to any one of claims 1 to 14; memory (130); and comprising at least one processor (120), An electronic device having stored in said memory instructions that, when executed by said at least one processor, cause said electronic device to obtain an image of a subject including a user's hand using said imaging device.

Images