Lens assembly and electronic device including the lens assembly

Abstract

According to embodiments of this disclosure, an electronic device may be provided. The electronic device may include a lens assembly. The lens assembly may include: a lens group comprising a plurality of lenses aligned along an optical axis in a direction from the object side to the image side; an image sensor including an imaging plane on which an image is formed; and at least one reflecting member (M). Among the plurality of lenses, the first lens from the object side may have positive refractive power, and the first lens may have at least one of its object-facing surface and its image-facing surface formed aspherical, and the object-facing surface of the first lens may be formed convex. In at least one lens with negative refractive power included in the lens group, the lens closest to the object side may have at least one of its object-facing surface and its image-facing surface formed aspherical, and the image-facing surface may be formed concave. Various other embodiments are also possible.

Description

Technical Field

[0001] Embodiments of this disclosure relate to a lens assembly and an electronic device including the lens assembly. Background Technology

[0002] Optical devices (e.g., cameras capable of capturing images or videos) have been widely used. Because optical devices employing solid-state image sensors (charge-coupled devices (CCDs) or complementary metal-oxide-semiconductor (CMOS)) can easily preserve, reproduce, or move images compared to film-type optical devices, traditional film-type optical devices have recently been replaced by digital cameras or video cameras with solid-state image sensors such as CCDs or CMOS.

[0003] To obtain high-quality images and / or video, optical devices can include an optical system comprising a lens assembly with multiple lenses and an image sensor with a high pixel count. The lens assembly can have a low F-number (Fno) and small aberrations, thus enabling the acquisition of high-quality (high-resolution) images and / or video. Obtaining a low F-number and small aberrations, i.e., higher resolution and brighter images, requires a combination of multiple lenses. Including more pixels allows the image sensor to have a higher pixel count, and an image sensor with a higher pixel count can obtain higher-resolution images and / or video. To implement a high-pixel image sensor within the limited installation space of an electronic device, multiple pixels with very small dimensions, such as micrometer-scale pixels, can be configured. Recently, portable electronic devices, such as smartphones and tablet computers, have been equipped with image sensors comprising tens of millions to hundreds of millions of micrometer-scale pixels. Such high-performance optical devices can have an appealing effect on attracting users to purchase electronic devices.

[0004] The above information may be provided as relevant technology to aid in understanding the purposes of this disclosure. No statement or determination is made as to whether any of the foregoing content can be used as background technology in relation to this disclosure. Summary of the Invention

[0005] Technical solution According to embodiments of this disclosure, an electronic device may be provided. The electronic device may include a lens assembly. The lens assembly may include: a lens group comprising a plurality of lenses aligned along an optical axis in a direction from the object side to the image side; an image sensor including an imaging plane on which an image is formed; and at least one reflecting member M. The first lens of the plurality of lenses, starting from the object side, may have positive refractive power, at least one of the object-facing surface and the image-facing surface of the first lens may be formed aspherical, and the object-facing surface of the first lens may be formed convex. The lens closest to the object side among at least one lens of negative refractive power included in the lens group may have at least one of the object-facing surface or the image-facing surface formed aspherical, and may have the image-facing surface formed concave. The lens assembly may satisfy the following [Formula 1] to [Formula 3].

[0006] [Formula 1] 65 <L1 Abbe<81 [Formula 2] 0.56 <EFL / OTTL<1.33 [Formula 3] 5 <FOV<28 Wherein, L1 Abbe in [Formula 1] is the Abbe number of the first lens L1 from the object side among the plurality of lenses, OTTL in [Formula 2] is the distance from the vertex of the object-facing surface of the first lens L1 to the image sensor, EFL in [Formula 2] is the total focal length of the lens assembly, and FOV in [Formula 3] is the total field of view of the lens assembly.

[0007] According to embodiments of this disclosure, a lens assembly can be provided. The lens assembly may include: a lens group comprising a plurality of lenses aligned along an optical axis in a direction from the object side to the image side; an image sensor including an imaging plane on which an image is formed; and at least one reflecting member M. The first lens among the plurality of lenses, starting from the object side, may have positive refractive power, and at least one of the object-facing surface and the image-facing surface of the first lens may be formed aspherical, and the object-facing surface of the first lens may be convex. The lens closest to the object side among at least one lens with negative refractive power in the lens group may have at least one of its object-facing surface or its image-facing surface formed aspherical, and may have its image-facing surface formed concave. The lens assembly may satisfy the following [Formula 1] to [Formula 3].

[0008] [Formula 1] 65 <L1 Abbe<81 [Equation 2] 0.56 <EFL / OTTL<1.33 [Formula 3] 5 <FOV<28 Wherein, L1 Abbe in [Formula 1] is the Abbe number of the first lens L1 from the object side among the plurality of lenses, OTTL in [Formula 2] is the distance from the vertex of the object-facing surface of the first lens L1 to the image sensor, EFL in [Formula 2] is the total focal length of the lens assembly, and FOV in [Formula 3] is the total field of view of the lens assembly. Attached Figure Description

[0009] Figure 1 This is a block diagram illustrating an electronic device in a network environment according to an embodiment of the present disclosure.

[0010] Figure 2 This is a block diagram illustrating a camera module according to an embodiment of the present disclosure.

[0011] Figure 3 This is a front perspective view showing an electronic device according to an embodiment of the present disclosure.

[0012] Figure 4 This is a rear perspective view showing an electronic device according to an embodiment of the present disclosure.

[0013] Figure 5a This is a configuration diagram illustrating an optical system including a lens assembly and an image sensor according to an embodiment of the present disclosure.

[0014] Figure 5b This illustrates an embodiment according to the present disclosure. Figure 5a A curve showing the spherical aberration of the lens assembly.

[0015] Figure 5c This illustrates an embodiment according to the present disclosure. Figure 5a The astigmatism curve of the lens assembly.

[0016] Figure 5d This illustrates an embodiment according to the present disclosure. Figure 5a A graph showing the distortion of the lens components.

[0017] Figure 6a This is a configuration diagram illustrating an optical system including a lens assembly and an image sensor according to an embodiment of the present disclosure.

[0018] Figure 6b This illustrates an embodiment according to the present disclosure. Figure 6a A curve showing the spherical aberration of the lens assembly.

[0019] Figure 6c This illustrates an embodiment according to the present disclosure. Figure 6aThe astigmatism curve of the lens assembly.

[0020] Figure 6d This illustrates an embodiment according to the present disclosure. Figure 6a A graph showing the distortion of the lens components.

[0021] Figure 7a This is a configuration diagram illustrating an optical system including a lens assembly and an image sensor according to an embodiment of the present disclosure.

[0022] Figure 7b This illustrates an embodiment according to the present disclosure. Figure 7a A curve showing the spherical aberration of the lens assembly.

[0023] Figure 7c This illustrates an embodiment according to the present disclosure. Figure 7a The astigmatism curve of the lens assembly.

[0024] Figure 7d This illustrates an embodiment according to the present disclosure. Figure 7a A graph showing the distortion of the lens components.

[0025] Figure 8a This is a configuration diagram illustrating an optical system including a lens assembly and an image sensor according to an embodiment of the present disclosure.

[0026] Figure 8b This illustrates an embodiment according to the present disclosure. Figure 8a A curve showing the spherical aberration of the lens assembly.

[0027] Figure 8c This illustrates an embodiment according to the present disclosure. Figure 8a The astigmatism curve of the lens assembly.

[0028] Figure 8d This illustrates an embodiment according to the present disclosure. Figure 8a A graph showing the distortion of the lens components.

[0029] Figure 9a This is a configuration diagram illustrating an optical system including a lens assembly and an image sensor according to an embodiment of the present disclosure.

[0030] Figure 9b This illustrates an embodiment according to the present disclosure. Figure 9a A curve showing the spherical aberration of the lens assembly.

[0031] Figure 9c This illustrates an embodiment according to the present disclosure. Figure 9a The astigmatism curve of the lens assembly.

[0032] Figure 9d This illustrates an embodiment according to the present disclosure. Figure 9a A graph showing the distortion of the lens components.

[0033] Figure 10a This is a configuration diagram illustrating an optical system including a lens assembly and an image sensor according to an embodiment of the present disclosure.

[0034] Figure 10b This illustrates an embodiment according to the present disclosure. Figure 10a A curve showing the spherical aberration of the lens assembly.

[0035] Figure 10c This illustrates an embodiment according to the present disclosure. Figure 10a The astigmatism curve of the lens assembly.

[0036] Figure 10d This illustrates an embodiment according to the present disclosure. Figure 10a A graph showing the distortion of the lens components.

[0037] Throughout the accompanying drawings, similar reference numerals may be assigned to similar parts, configurations, and / or structures. Detailed Implementation

[0038] Figure 1 This is a block diagram illustrating an electronic device 101 in a network environment 100 according to an embodiment of the present disclosure. (Refer to...) Figure 1 In network environment 100, electronic device 101 can communicate with at least one of electronic devices 102 via a first network 198 (e.g., a short-range wireless communication network), or with at least one of electronic device 104 or server 108 via a second network 199 (e.g., a long-range wireless communication network). According to an embodiment, electronic device 101 can communicate with electronic device 104 via server 108. According to an embodiment, electronic device 101 may include a processor 120, a memory 130, an input module 150, a sound 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 (SIM) 196, or an antenna module 197. In an embodiment, at least one of the above components (e.g., connection terminal 178) may be omitted from electronic device 101, or one or more other components may be added to electronic device 101. According to the embodiments, some of the above components (e.g., sensor module 176, camera module 180, or antenna module 197) can be integrated into a single component (e.g., display module 160).

[0039] Processor 120 may run software (e.g., program 140) to control at least one other component (e.g., hardware or software component) of electronic device 101 connected to processor 120, and may perform various data processing or calculations. According to one embodiment, as at least part of the data processing or calculation, processor 120 may store commands or data received from another component (e.g., sensor module 176 or communication module 190) in volatile memory 132, process the commands or data stored in volatile memory 132, and store the resulting data in non-volatile memory 134. According to embodiments, processor 120 may include a main processor 121 (e.g., central processing unit (CPU) or application processor (AP)) or an auxiliary processor 123 (e.g., graphics processing unit (GPU), neural processing unit (NPU), image signal processor (ISP), sensor central processor, or communication processor (CP)) that is operationally independent of or combined with the main processor 121. For example, when electronic device 101 includes a main processor 121 and an auxiliary processor 123, the auxiliary processor 123 may be configured to use less power than the main processor 121, or to be dedicated to a specific function. The auxiliary processor 123 may be implemented separately from the main processor 121, or may be implemented as part of the main processor 121.

[0040] When the main processor 121 is inactive (e.g., in sleep mode), the auxiliary processor 123 (rather than the main processor 121) can control at least some of the functions or states associated with at least one component of the electronic device 101 (e.g., display module 160, sensor module 176, or communication module 190), or when the main processor 121 is active (e.g., running an application), the auxiliary processor 123 can work with the main processor 121 to control at least some of the functions or states associated with at least one component of the electronic device 101 (e.g., display module 160, sensor module 176, or communication module 190). According to embodiments, the auxiliary processor 123 (e.g., an image signal processor or a communication processor) may be implemented as part of another component (e.g., camera module 180 or communication module 190) functionally associated with the auxiliary processor 123. According to embodiments, the auxiliary processor 123 (e.g., a neural processing unit) may include hardware architecture dedicated to artificial intelligence model processing. Artificial intelligence models can be generated through machine learning. For example, such learning can be performed via electronic device 101 where artificial intelligence is performed or via a separate server (e.g., server 108). The learning algorithm may include, but is not limited to, supervised learning, unsupervised learning, semi-supervised learning, or reinforcement learning. The artificial intelligence model may include multiple layers of artificial neural networks. The artificial neural network may be 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), or a deep Q-network, or a combination of two or more thereof, but is not limited thereto. Additionally or optionally, the artificial intelligence model may include software structures in addition to hardware structures.

[0041] Memory 130 may store various data used by at least one component of electronic device 101 (e.g., processor 120 or sensor module 176). The various data may include, for example, software (e.g., program 140) and input or output data for commands associated with it. Memory 130 may include volatile memory 132 or non-volatile memory 134.

[0042] The program 140 may be stored as software in the memory 130, and the program 140 may include, for example, an operating system (OS) 142, middleware 144, or application 146.

[0043] Input module 150 can receive commands or data from outside electronic device 101 (e.g., a user) that will be used by other components of electronic device 101 (e.g., processor 120). Input module 150 may include, for example, a microphone, mouse, keyboard, keys (e.g., buttons), or digital pen (e.g., stylus).

[0044] The sound output module 155 can output sound signals to the outside of the electronic device 101. The sound output module 155 may include, for example, a speaker or a receiver. The speaker can be used for general purposes such as playing multimedia or playing records. The receiver can be used to receive incoming calls. According to an embodiment, the receiver can be implemented separately from the speaker or as part of the speaker.

[0045] Display module 160 can visually provide information to the outside of electronic device 101 (e.g., to a user). Display module 160 may include, for example, a display, a holographic device, or a projector, and control circuitry for controlling a respective one of the display, holographic device, and projector. According to an embodiment, display module 160 may include a touch sensor adapted to detect touch or a pressure sensor configured to measure the intensity of the force generated by a touch.

[0046] The audio module 170 can convert sound into electrical signals and vice versa. According to an embodiment, the audio module 170 can obtain sound via the input module 150, or output sound via the sound output module 155 or headphones of an external electronic device (e.g., electronic device 102) that is directly (e.g., wired) or wirelessly connected to the electronic device 101.

[0047] Sensor module 176 can detect the operating state of electronic device 101 (e.g., power or temperature) or external environmental conditions (e.g., user status), and then generate an electrical signal or data value corresponding to the detected state. According to embodiments, sensor module 176 may include, for example, a gesture sensor, gyroscope sensor, atmospheric pressure sensor, magnetic sensor, accelerometer, grip sensor, proximity sensor, color sensor, infrared (IR) sensor, biometric sensor, temperature sensor, humidity sensor, or illuminance sensor.

[0048] Interface 177 may support one or more specific protocols used to enable electronic device 101 to connect directly (e.g., wired) or wirelessly to external electronic devices (e.g., electronic device 102). According to embodiments, interface 177 may include, for example, a High Definition Multimedia Interface (HDMI), a Universal Serial Bus (USB) interface, a Secure Digital Card (SD) interface, or an audio interface.

[0049] Connection 178 may include a connector, through which electronic device 101 may be physically connected to an external electronic device (e.g., electronic device 102). According to embodiments, connection 178 may include, for example, an HDMI connector, a USB connector, an SD card connector, or an audio connector (e.g., a headphone connector).

[0050] The haptic module 179 can convert electrical signals into mechanical stimuli (e.g., vibration or motion) or electrical stimuli that can be recognized by a user through his touch or kinesthesia. According to an embodiment, the haptic module 179 may include, for example, a motor, a piezoelectric element, or an electrical stimulator.

[0051] Camera module 180 can capture still or moving images. According to an embodiment, camera module 180 may include one or more lenses, an image sensor, an image signal processor, or a flash.

[0052] The power management module 188 manages the power supply to the electronic device 101. According to an embodiment, the power management module 188 may be implemented as at least part of, for example, a power management integrated circuit (PMIC).

[0053] Battery 189 can power at least one component of electronic device 101. According to an embodiment, battery 189 may include, for example, a non-rechargeable primary battery, a rechargeable rechargeable battery, or a fuel cell.

[0054] Communication module 190 can support the establishment of a direct (e.g., wired) or wireless communication channel between electronic device 101 and external electronic devices (e.g., electronic device 102, electronic device 104, or server 108), and perform communication via the established communication channel. Communication module 190 may include one or more communication processors capable of operating independently of processor 120 (e.g., application processor (AP)) and supporting direct (e.g., wired) or wireless communication. According to embodiments, communication module 190 may include wireless communication module 192 (e.g., cellular communication module, short-range wireless communication module, or Global Navigation Satellite System (GNSS) communication module) or wired communication module 194 (e.g., local area network (LAN) communication module or power line communication (PLC) module). A corresponding one of these communication modules can communicate via a first network 198 (e.g., a short-range communication network, such as Bluetooth). TM The wireless communication module 192 can communicate with external electronic devices via a Wi-Fi Direct or Infrared Data Association (IrDA) network or a second network 199 (e.g., a long-range communication network, such as a traditional cellular network, a 5G network, a next-generation communication network, the Internet, or a computer network (e.g., a LAN or a wide area network (WAN))). These various types of communication modules can be implemented as a single component (e.g., a single chip) or as multiple components separate from each other (e.g., multiple chips). The wireless communication module 192 can use user information (e.g., an International Mobile Subscriber Identity (IMSI)) stored in the user identification module 196 to identify and verify the electronic device 101 in the communication network (such as a first network 198 or a second network 199).

[0055] Wireless communication module 192 can support 5G networks following 4G networks and next-generation communication technologies (such as new radio (NR) access technologies). NR access technologies can support enhanced mobile broadband (eMBB), massive machine-type communication (mMTC), or ultra-reliable low-latency communication (URLLC). Wireless communication module 192 can support high-frequency bands (e.g., millimeter-wave bands) to achieve, for example, high data transmission rates. Wireless communication module 192 can support various technologies used to ensure performance in high-frequency bands, such as, for example, beamforming, massive MIMO, full-dimensional MIMO (FD-MIMO), array antennas, analog beamforming, or massive antennas. Wireless communication module 192 can support various requirements specified in electronic device 101, external electronic devices (e.g., electronic device 104), or network systems (e.g., second network 199). According to an embodiment, the wireless communication module 192 may support peak data rates (e.g., 20 Gbps or greater) for implementing eMBB, lost coverage (e.g., 164 dB or less) for implementing mMTC, or U-plane latency (e.g., 0.5 ms or less for each of the downlink (DL) and uplink (UL), or 1 ms or less round trip) for implementing URLLC.

[0056] Antenna module 197 can transmit or receive signals or power to or from the exterior of electronic device 101 (e.g., external electronic device). According to an embodiment, antenna module 197 may include an antenna comprising a radiator formed of conductive material or conductive patterns formed in or on a substrate (e.g., a printed circuit board (PCB)). According to an embodiment, antenna module 197 may include multiple antennas (e.g., an antenna array). In this case, at least one antenna suitable for a communication scheme used in a communication network (such as a first network 198 or a second network 199) can be selected from the multiple antennas by, for example, communication module 190 (e.g., wireless communication module 192). Signals or power can then be transmitted or received between communication module 190 and the external electronic device via the selected at least one antenna. According to an embodiment, other components besides the radiator (e.g., a radio frequency integrated circuit (RFIC)) may be additionally incorporated into antenna module 197.

[0057] According to an embodiment, antenna module 197 can form a millimeter-wave antenna module. According to an embodiment, the millimeter-wave antenna module may include a printed circuit board, a radio frequency integrated circuit (RFIC), and multiple antennas (e.g., an array antenna), wherein the RFIC is disposed on or adjacent to a first surface (e.g., a bottom surface) of the printed circuit board and is capable of supporting a specified high-frequency band (e.g., a millimeter-wave band), and the multiple antennas are disposed on or adjacent to a second surface (e.g., a top surface or a side surface) of the printed circuit board and are capable of transmitting or receiving signals in the specified high-frequency band.

[0058] At least some of the aforementioned components can be interconnected and communicate signals (e.g., commands or data) between them via an inter-peripheral communication scheme (e.g., bus, general purpose input / output (GPIO), serial peripheral interface (SPI), or mobile industrial processor interface (MIPI)).

[0059] According to an embodiment, commands or data can be sent or received between electronic device 101 and external electronic device 104 via server 108 connected to a second network 199. Each of electronic device 102 or electronic device 104 can be a device of the same type as electronic device 101, or a device of a different type. According to an embodiment, all or some operations that would be performed on electronic device 101 can be performed on one or more of external electronic devices 102, 104, or 108. For example, if electronic device 101 is required to automatically perform a function or service, or is required to perform a function or service in response to a request from a user or another device, electronic device 101 may request the one or more external electronic devices to perform at least a portion of the function or service, instead of running the function or service, or electronic device 101 may request the one or more external electronic devices to perform at least a portion of the function or service in addition to running the function or service. Upon receiving the request, one or more external electronic devices may perform at least a portion of the requested function or service, or perform additional functions or services related to the request, and transmit the result of the execution to electronic device 101. Electronic device 101 may provide the result as at least a partial response to the request, with or without further processing of the result. For this purpose, technologies such as cloud computing, distributed computing, mobile edge computing (MEC), or client-server computing may be used. Electronic device 101 may use, for example, distributed computing or mobile edge computing to provide ultra-low latency services. In an embodiment, external electronic device 104 may include an Internet of Things (IoT) device. Server 108 may be an intelligent server using machine learning and / or neural networks. According to an embodiment, external electronic device 104 or server 108 may be included in a second network 199. Electronic device 101 may be applied to intelligent services based on 5G communication technology or IoT-related technologies (e.g., smart homes, smart cities, smart cars, or healthcare).

[0060] Figure 2 This illustrates a camera module 290 according to an embodiment of the present disclosure (e.g., Figure 1 Block diagram 200 of the camera module 180 (see Figure 180). Figure 2Camera module 290 may include lens assembly 280, flash 220, image sensor 230, image stabilizer 240, memory 250 (e.g., buffer memory), or image signal processor 260. In an embodiment, lens assembly 280 may include image sensor 230. Lens assembly 280 may capture light emitted from an object to be imaged. Lens assembly 280 may include one or more lenses. According to an embodiment, camera module 290 may include multiple lens assemblies 280. In this case, camera module 290 may form, for example, a dual-camera, 360-degree camera, or spherical camera. Some of the multiple lens assemblies 280 may have the same lens characteristics (e.g., field of view, focal length, autofocus, F-number, or optical zoom), or at least one of the lens assemblies may have one or more lens properties that are different from the lens properties of the other lens assemblies. Lens assembly 280 may include, for example, a wide-angle lens or a telephoto lens.

[0061] Flash 220 emits light to enhance light reflected from an object. According to embodiments, flash 220 may include one or more light-emitting diodes (e.g., red-green-blue (RGB) LEDs, white LEDs, infrared (IR) LEDs, or ultraviolet (UV) LEDs) or xenon lamps. Image sensor 230 acquires an image corresponding to an object by converting light emitted or reflected from the object and transmitted through lens assembly 280 into an electrical signal. According to embodiments, image sensor 230 may include one image sensor selected from a plurality of image sensors with different characteristics (such as an RGB sensor, a black-and-white (BW) sensor, an IR sensor, or a UV sensor), a plurality of image sensors having the same characteristics, or a plurality of image sensors with different characteristics. Each image sensor included in image sensor 230 may be implemented using, for example, a charge-coupled device (CCD) sensor or a complementary metal-oxide-semiconductor (CMOS) sensor.

[0062] Image stabilizer 240 may move image sensor 230 or at least one lens included in lens assembly 280 in a specific direction, or may control the operating characteristics of image sensor 230 (e.g., adjust readout timing) in response to movement of camera module 290 or electronics 201 including camera module 290. This allows at least a portion of the negative effects of such movement on the captured image to be compensated. According to embodiments, image stabilizer 240 may use a gyroscope sensor (not shown) or accelerometer sensor (not shown) arranged inside or outside camera module 290 to sense camera module 290 or electronics (e.g., Figure 1The movement of the electronic device 101 in the image sensor 230 is described. According to an embodiment, the image stabilizer 240 may be implemented as, for example, an optical image stabilizer. The memory 250 may at least temporarily store at least a portion of the images acquired via the image sensor 230 for subsequent image processing tasks. For example, if image capture is delayed due to shutter lag or multiple images are acquired quickly, the acquired raw images (e.g., Bayer pattern images, high-resolution images) may be stored in the memory 250 and may be moved via… Figure 1 The display module 160 is used to preview its corresponding copy image (e.g., a low-resolution image). Then, if predetermined conditions are met (e.g., user input or system command), at least some of the original images stored in the memory 250 can be acquired and processed by, for example, an image signal processor 260. According to an embodiment, the memory 250 can be configured as a memory (e.g., ... Figure 1 At least a portion of the memory 130, or the memory 250 may be configured as a separate memory that operates independently of the memory.

[0063] Image signal processor 260 can perform one or more image processing operations on an image acquired via image sensor 230 or an image stored in memory 250. The one or more image processing operations may include, for example, depth map generation, 3D modeling, panorama generation, feature point extraction, image compositing, or image compensation (e.g., noise reduction, resolution adjustment, brightness adjustment, blurring, sharpening, or softening). Additionally or optionally, image signal processor 260 can perform control (e.g., exposure time control or readout timing control) on at least one component included in camera module 290 (e.g., image sensor 230). The image processed by image signal processor 260 can be stored back in memory 250 for further processing, or the image can be provided to external components (e.g., [missing information]). Figure 1 (The memory 130, display module 160, electronic device 102, electronic device 104, or server 108). According to an embodiment, the image signal processor 260 may be configured as a processor (e.g., Figure 1 The image signal processor 260 may be configured as a separate processor operating independently of the processor 120, or at least a portion thereof. If the image signal processor 260 is configured as a separate processor from the processor 120, the processor 120 may cause at least one image processed by the image signal processor 260 to be displayed via the display module 160 as is, or to be displayed after further image processing.

[0064] According to an embodiment, electronic devices (e.g., Figure 1The electronic device 101 may include a plurality of camera modules 290 with different attributes or functions. In this case, for example, at least one of the plurality of camera modules 290 may be a wide-angle camera, and at least another of the plurality of camera modules 290 may be a telephoto camera. Similarly, at least one of the plurality of camera modules 290 may be a front-facing camera, and at least another of the plurality of camera modules 290 may be a rear-facing camera.

[0065] Figure 3 This is a front perspective view showing an electronic device according to an embodiment of the present disclosure; Figure 4 This is a rear perspective view showing an electronic device according to an embodiment of the present disclosure.

[0066] Figure 3 and Figure 4 The configuration of the electronic device 101 can be with Figure 1 The configuration of the electronic device 101 is all or part the same.

[0067] Reference Figure 3 and Figure 4 According to an embodiment, the electronic device 101 may include a housing 210, including a first surface (or front surface) 210A, a second surface (or rear surface) 210B, and a side surface 210C surrounding the space between the first surface 210A and the second surface 210B. According to an embodiment (not shown), the housing 210 may represent a structure forming... Figure 2 First surface 210A, Figure 3 The structure comprises a portion of the second surface 210B and the side surface 210C. According to an embodiment, the first surface 210A may be formed at least partially from a substantially transparent front panel 202 (e.g., a glass or polymer panel including various coatings). The second surface 210B may be formed from a substantially opaque back panel 211. The back panel 211 may be formed from, for example, laminated or colored glass, ceramic, polymer, metal (e.g., aluminum, stainless steel (STS), or magnesium), or a combination of at least two of these. The side surface 210C may be formed from a side structure (or “side frame structure”) 218, coupled to the front panel 202 and the back panel 211, and comprising metal and / or polymer. In an embodiment, the back panel 211 and the side structure 218 may be integrally formed together and comprise the same material (e.g., a metal such as aluminum).

[0068] Although not shown, the front panel 202 may include a region that bends and extends seamlessly from at least a portion of its edge toward the rear panel 211. In embodiments, only one of the regions of the front panel 202 (or rear panel 211) that bend and extend toward the rear panel 211 (or front panel 202) may be included in one edge of the first surface 210A. According to embodiments, the front panel 202 or the rear panel 211 may be substantially flat, and in this case, the bent and extended region may not be included. When the bent and extended region is included, the thickness of the electronic device 101 at the portion including the bent and extended region may be less than the thickness of the remaining portion.

[0069] According to an embodiment, the electronic device 101 may include a display 201 and an audio module (not shown) including at least one sound hole 203, 207, and 214 (e.g., Figure 1 The audio module 170), sensor module 204 (e.g., Figure 1 Sensor module 176), camera modules 205, 212 and 213 (e.g., Figure 1 The camera module 180), key input device 217 (e.g., Figure 1 Input module 150) or connector holes 208 and 209 (e.g., Figure 1 At least one of the above components (connection terminal 178). In an embodiment, the electronic device 101 may not include at least one of the above components (e.g., key input device 217 or light-emitting device 206), or other components may be added.

[0070] According to an embodiment, the display 201 can be visually exposed through, for example, a large portion of the front panel 202. In an embodiment, at least a portion of the display 201 can be visually exposed through the front panel 202 forming the first surface 210A or through a portion of the side surface 210C. In an embodiment, the edges of the display 201 can be formed to be substantially the same as the adjacent shape of the front panel 202. In an embodiment (not shown), the spacing between the outer edge of the display 201 and the outer edge of the front panel 202 can be kept substantially uniform to give the display 201 a larger visually exposed area.

[0071] In one embodiment (not shown), the screen display area of ​​the display 201 may have a recess or opening in a portion thereof, and at least one or more of the sound hole 214, sensor module 204, camera module 205, and light-emitting device 206 may be aligned with the recess or opening. In another embodiment (not shown), at least one or more of the sound hole 214, sensor module 204, camera module 205, fingerprint sensor (not shown), and light-emitting device 206 may be included on the rear surface of the screen display area of ​​the display 201. In another embodiment (not shown), the display 201 may be configured to be connected to or adjacent to a touch detection circuit, a pressure sensor capable of measuring the intensity (pressure) of a touch, and / or a digital converter for detecting a magnetic field type stylus. In another embodiment, at least a portion of the sensor module 204 and / or at least a portion of the key input device 217 may be disposed on the side surface 210C.

[0072] According to an embodiment, the audio module (not shown) may include a microphone hole 203 and sound holes 207 and 214. A microphone for acquiring external sound may be disposed in the microphone hole 203. In an embodiment, multiple microphones may be disposed to detect the direction of sound. According to an embodiment, sound holes 207 and 214 may include an external sound hole 207 and a telephone receiver hole 214. In an embodiment, sound holes 207 and 214 and the microphone hole 203 may be implemented as a single hole, or a speaker (e.g., a piezoelectric speaker) may be included in the audio module without sound holes 207 and 214.

[0073] According to an embodiment, sensor module 204 can generate electrical signals or data values ​​corresponding to external environmental conditions or internal operating conditions of electronic device 101. Sensor module 204 may include, for example, a first sensor module 204 (e.g., a proximity sensor) and / or a second sensor module (not shown) (e.g., a fingerprint sensor) disposed on the front surface 210A of housing 210. According to an embodiment, an additional sensor module may be disposed on the second surface 210B of housing 210. Fingerprint sensor (not shown) may be disposed on the second surface 210B or side surface 210C and the first surface 210A (e.g., display 201) of housing 210. Electronic device 101 may also include at least one of, for example, a gesture sensor, a gyroscope sensor, an atmospheric pressure sensor, a magnetic sensor, an accelerometer, a grip sensor, a color sensor, an infrared (IR) sensor, a biometric sensor, a temperature sensor, a humidity sensor, or an illuminance sensor.

[0074] According to an embodiment, camera modules 205, 212, and 213 may include a first camera module 205 facing a first surface 210A of electronic device 101, and a second camera module 212 and / or a flash 213 facing a second surface 210B. For example, the first camera module 205 and / or the second camera module 212 may include one or more lenses, image sensors, and / or image signal processors. According to an embodiment, some of camera modules 205 and 212 (e.g., camera module 205) and / or some sensor modules (e.g., sensor module 204) may be configured to be exposed to the outside through at least a portion of the display 201. According to an embodiment, the first camera module 205 may include a punch-hole camera disposed in a hole or recess formed in the rear surface of the display 201. For example, the first camera module 205 may receive at least a portion of the light incident on the first surface 210A (or front surface) of electronic device 101 through the display 201 inside electronic device 101. According to an embodiment, the first camera module 205 and / or sensor module 204 may be configured to contact the external environment through a transparent area of ​​the display 201 extending from the internal space of the electronic device 101 to the front panel 202. Furthermore, some sensor modules 204 may be configured to perform their functions within the internal space of the electronic device without being visually exposed through the front panel 202.

[0075] According to an embodiment, the second camera module 212 may be disposed inside the housing 210, such that the lens is exposed on the second surface 210B (or rear surface) of the electronic device 101. For example, the camera module 212 may be electrically connected to a printed circuit board (e.g., Figure 4 The printed circuit board 240a). For example, the flash 213 may include a light-emitting diode or a xenon lamp. In an embodiment, one or more lenses (infrared (IR) camera, wide-angle lens, and telephoto lens) and an image sensor may be disposed on a surface of the electronic device 101. In an embodiment, the flash 213 may radiate infrared light. For example, infrared light radiated from the flash 213 and reflected by an object can be received by a sensor module (not shown) disposed on a second surface 210B of the housing 210. The electronic device 101 or processor (e.g., Figure 1 The processor 180 can detect depth information about an object based on the time point at which infrared light is received from the third sensor module.

[0076] Camera modules 205, 212, and 213 are not limited to the structures described above. Depending on the structure of the electronic device 101, various design changes can be made; for example, only some of the camera modules can be installed, or new camera modules can be added.

[0077] According to embodiments, electronic device 101 may include multiple camera modules (e.g., dual-camera or triple-camera) with different attributes (e.g., field of view) or functions. For example, multiple camera modules 205 and 212 may be configured to include lenses with different field of view, and electronic device 101 may control changes in the field of view of camera modules 205 and 212 performed by electronic device 101 based on user selection. At least one of the multiple camera modules 205 and 212 may form, for example, a wide-angle camera, and at least another of the multiple camera modules may form a telephoto camera. Similarly, at least one of the multiple camera modules 205 and 212 may be a front-facing camera, and at least another of the multiple camera modules may be a rear-facing camera. Furthermore, multiple camera modules 205 and 212 may include at least one of a wide-angle camera, a telephoto camera, and an infrared (IR) camera (e.g., a time-of-flight (TOF) camera, a structured light camera). According to embodiments, an IR camera may operate as at least part of a sensor module. For example, a TOF camera may operate as at least part of a sensor module (not shown) for detecting the distance to an object.

[0078] According to an embodiment, the key input device 217 may be disposed on the side surface 210C of the housing 210. In an embodiment, the electronic device 101 may not include some or all of the key input devices 217 described above, and the excluded key input devices 217 may be implemented in another form, such as soft keys on the display 201. In an embodiment, the key input device may include a sensor module disposed on the second surface 210B of the housing 210.

[0079] According to an embodiment, for example, a light-emitting device 206 may be disposed on a first surface 210A of the housing 210. The light-emitting device 206 may provide information, for example, about the state of the electronic device 101, in the form of light. In an embodiment, the light-emitting device 206 may provide a light source for processing interaction with, for example, a camera module 205. The light-emitting device 206 may include, for example, a light-emitting diode (LED), an infrared (IR) LED, or a xenon lamp.

[0080] According to an embodiment, connector holes 208 and 209 may include, for example, a first connector hole 208 and / or a second connector hole (e.g., a headphone jack) 209, wherein the first connector hole 208 is used to accommodate a connector for sending power and / or data to or receiving power and / or data from an external electronic device (e.g., a Universal Serial Bus (USB) connector), and the second connector hole 209 is used to accommodate a connector for sending audio signals to or receiving audio signals from an external electronic device.

[0081] [Example 1] Figure 5aThis is a configuration diagram illustrating an optical system including a lens assembly and an image sensor according to an embodiment of the present disclosure. Figure 5b This illustrates an embodiment according to the present disclosure. Figure 5a A curve showing the spherical aberration of the lens assembly. Figure 5c This illustrates an embodiment according to the present disclosure. Figure 5a The astigmatism curve of the lens assembly. Figure 5d This illustrates an embodiment according to the present disclosure. Figure 5a A graph showing the distortion of the lens components.

[0082] Reference Figures 5a to 5d In embodiments, electronic devices (e.g., Figure 1 , Figure 3 and Figure 4 The electronic device 101 may include a lens assembly 300 (e.g., Figure 2 The lens assembly 280 (or optical system) according to embodiments of the present disclosure. Figure 5a Lens assembly 300, Figure 6a Lens assembly 400, Figure 7a Lens assembly 500, Figure 8a Lens assembly 600, Figure 9a Lens assembly 700 and / or Figure 10a The lens assembly 800 can constitute the camera module of the electronic device 101 (e.g., Figure 1 Camera module 180 Figure 2 Camera module 290, Figure 3 Camera module 205 and / or Figure 4 At least a portion of the camera module 212.

[0083] According to an embodiment, the lens assembly 300 may be positioned on an optical axis OI that runs from the object (or external object) side to the image side, passing through the centers of multiple lenses. In the following description of the configuration of each lens, "object side" may refer to the direction in which the object O is located, and "image side" may refer to the direction in which the imaging plane img forming the image I is located.

[0084] According to an embodiment, the lens assembly 300 may include: a lens group comprising a plurality of (e.g., at least four or five) lenses L1, L2, L3, L4, L5; at least one reflecting member M; an aperture sto; and / or an image sensor IS. According to an embodiment, the lenses L1, L2, L3, L4, L5, the aperture sto, the reflecting member M, and / or the image sensor IS of the lens group may be substantially aligned on the optical axis OI.

[0085] Reference Figure 5aIn an embodiment, the lens group or lenses L1, L2, L3, L4, L5 of the lens assembly 300 may include a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, and a fifth lens L5 sequentially arranged and / or aligned along the optical axis OI in the direction from the object O toward the image sensor IS. According to an embodiment, each of the lenses L1, L2, L3, L4, L5, and / or the reflecting member M may include an "object-side surface" as the surface facing the object O and an "image-side surface" as the surface facing the image I (or the image sensor IS). For example, the first lens L1 may include an object-side surface S2 and an image-side surface S3. For example, the reflecting member M may include an object-side surface S4 and an image-side surface S5. The second lens L2 may include an object-side surface S6 and an image-side surface S7. The third lens L3 may include an object-side surface S8 and an image-side surface S9. The fourth lens L4 may include an object-side surface S10 and an image-side surface S11. The fifth lens L5 may include an object-side surface S12 and an image-side surface S13. According to an embodiment, lenses L1, L2, L3, L4, and L5 may be formed of glass and / or synthetic resin (e.g., plastic) materials.

[0086] According to an embodiment, at least some of the lenses L1, L2, L3, L4, and L5 may have at least one of the object-side surface or the image-side surface formed as an aspherical surface. For example, by forming the surfaces of the lenses L1, L2, L3, L4, and L5 as aspherical surfaces, spherical aberration that can occur in the lenses can be suppressed, coma at the peripheral portion of the image sensor IS can be prevented, astigmatism control can be facilitated, and field curvature from the center to the peripheral portion of the imaging plane img of the image sensor IS can be reduced.

[0087] In the detailed description below, the shapes of the object-side surfaces of lenses L1, L2, L3, L4, and L5 facing the object O and / or the image-side surfaces facing the image sensor IS or imaging plane img can be described using the terms "concave" or "convex." This description of the lens surface shape can be a description of the shape of a point intersecting the optical axis OI or a paraxial region intersecting the optical axis OI. "Object-side surface has a concave shape" can describe a shape where the center of the radius of curvature of the object-side surface is located on the object O side. "Object-side surface has a convex shape" can describe a shape where the center of the radius of curvature of the object-side surface is located on the image sensor side. Therefore, although one surface of the lens (e.g., the optical axis portion of that surface) is described as convex, the edge portions of the lens (e.g., portions separated from the optical axis portion of that surface by a predetermined distance) can be concave. Similarly, although one surface of the lens (e.g., the optical axis portion of that surface) is described as concave, the edge portions of the lens (e.g., portions separated from the optical axis portion of that surface by a predetermined distance) can be convex.

[0088] According to an embodiment, the first lens (or first lens) L1, which is the lens closest to the object (or the first lens from the object), may have positive refractive power. According to an embodiment, the object-side surface S2 of the first lens L1 may have a convex shape. For example, the convex shape of the object-side surface S2 towards the object can suppress the increase in spherical aberration caused by the large apertures of lenses L1, L2, L3, L4, and L5. According to an embodiment, at least one of the object-side surface S2 and the image-side surface S3 of the first lens L1 may be formed aspherical.

[0089] According to an embodiment, some of the lenses L1, L2, L3, L4, and L5, including the first lens L1, can be extremely low dispersion lenses (or ultra-extreme low dispersion lenses). For example, such extremely low (or ultra-extreme low) dispersion lenses can be formed from a glass material that has been formed to have lower dispersion than ordinary glass, in order to reduce chromatic aberration. According to an embodiment, by setting some of the lenses L1, L2, L3, L4, and L5 of the lens assembly 300 as extremely low (or ultra-extreme low) dispersion lenses, chromatic aberration can be minimized and resolution can be enhanced.

[0090] According to an embodiment, lenses L1, L2, L3, L4, and L5 may include at least one lens with negative refractive power. According to an embodiment, at least one of the second lens L2 (as the second lens from the object side), the third lens L3 (as the third lens), the fourth lens L4 (as the fourth lens), and the fifth lens L5 (as the fifth lens) may have negative refractive power. According to an embodiment, the lens closest to the object side among at least one of the lenses L1, L2, L3, L4, and L5 with negative refractive power may have at least one surface of either the object side surface or the image side surface formed aspherical. According to an embodiment, the lens closest to the object side among at least one lens with negative refractive power may have a concave shape on the image side surface.

[0091] In an embodiment, at least one of lenses L1, L2, L3, L4, L5 and / or image sensor IS can be configured to reciprocate along the optical axis OI. According to an embodiment, electronic devices (e.g., Figure 1 Electronic device 101 and / or Figure 3 and Figure 4 Electronic device 101) or processor (e.g., Figure 1 The processor 120 can be configured to focus or adjust the focal length by causing the lenses L1, L2, L3, L4, L5 and / or the image sensor IS to reciprocate along the optical axis OI.

[0092] According to an embodiment, a reflective member M may be disposed between the first lens L1 and the second lens L2. The reflective member M may be an optical member configured to refract and / or reflect light entering the image sensor IS after passing through the lens assembly 300. For example, the path of the principal ray of a beam of light passing through the reflective member M may be parallel to the principal ray incident on the lens assembly 300. According to an embodiment, the reflective member M may include at least one mirror and / or at least one prism configured to refract and / or reflect light. For example, the reflective member M may be configured to change the path of light at least once. According to an embodiment, by including the reflective member M in the lens assembly 300, a folding optical system (or a folding camera) can be realized. For example, by providing the reflective member M to the lens assembly 300, a folding optical system (or a folding camera) can be realized according to electronic devices (e.g., Figure 3 and Figure 4 The miniaturization and / or slimming of the electronic device 101 ensures the focal length of the lens assembly 300 within a limited space.

[0093] For example, when a high-performance, large-size image sensor (IS) is included, the electronic device can be enhanced (e.g., Figure 3 and Figure 4 The image quality of the electronic device 101 is improved. For example, the maximum image height (MAX IH) of the image sensor IS of this disclosure can have a size of about 2.8 mm to about 4.3 mm or about 2.9 mm to about 4.2 mm. Here, the maximum image height (MAX IH) of the image sensor IS can represent the maximum value of half the diagonal length of the image sensor IS. However, as the image sensor becomes larger, the corresponding lens assembly 300 may be difficult to mount on a thinner electronic device 101. For example, the thickness of the electronic device may increase due to the length or width of the image sensor IS. Therefore, according to the embodiment, by including at least one reflective member M in the lens assembly 300, design freedom regarding the arrangement orientation of lenses L1, L2, L3, L4, L5 or the arrangement orientation of the image sensor IS can be ensured, so that even when the image sensor IS becomes larger, it can be easily mounted on a miniaturized and / or thinner electronic device 101.

[0094] According to an embodiment, the aperture sto can be disposed between the reflecting member M and the second lens L2, and can be disposed or implemented adjacent to a surface of the second lens L2 (e.g., the object-side surface S6). According to an embodiment, the aperture sto is disposed on the object side relative to some of the lenses L2, L3, L4, and L5 of the lens group, and can substantially define the area where light enters the lenses L2, L3, L4, and L5. For example, the lenses L2, L3, L4, and L5 are substantially disposed between the aperture sto and the image sensor IS, and can focus the light incident through the aperture sto and allow the light to enter the image sensor IS.

[0095] According to an embodiment, the image sensor IS may include an imaging plane img, which is a surface on which light, at least partially focused by an aperture sto and / or lenses L1, L2, L3, L4, L5, is received and an image is formed. According to an embodiment, the image sensor IS is a sensor mounted on a circuit board or the like and positioned in alignment with the optical axis, and is responsive to light. The image sensor may include sensors such as complementary metal-oxide-semiconductor (CMOS) or charge-coupled device (CCD) sensors. The image sensor IS is not limited to these and may include various elements, for example, that convert an image of an object into an electrical image signal. The image sensor IS can obtain an image of an object by detecting brightness, contrast, or color information about the object from light that has passed through multiple lenses.

[0096] According to an embodiment, the lens assembly 300 may further include an infrared cut-off filter F. According to an embodiment, the infrared cut-off filter F may include an object-side surface S14 facing the object O and an image-side surface S15 facing the image sensor IS. For example, the infrared cut-off filter F may block light in a wavelength band (e.g., infrared) that is not visible to the user's naked eye but is detected by the film or image sensor IS. For example, in a lens assembly or electronic device 101 for detecting infrared light, the infrared cut-off filter F may be replaced by a pass filter that transmits infrared light and blocks visible light. For example, the infrared cut-off filter F may be aligned along the optical axis OI with a plurality of lenses L1, L2, L3, L4, L5, aperture S10, and / or image sensor IS of the lens group.

[0097] Unless otherwise specified, the radius, effective focal length (EFL), f, total optical length (TTL), surface distance (SD), thickness, or image height (IH) of the image sensor IS for lenses L1, L2, L3, L4, and L5 of this disclosure may all be in millimeters (mm). Furthermore, the radius, effective focal length, TTL, SD, thickness, or IH of the image sensor IS for lenses L1, L2, L3, L4, and L5 may be a distance measured from the optical axis OI.

[0098] Below, [Formulas 1 to 5] are described according to embodiments for implementing lens assembly 300 as a telephoto camera with minimized chromatic aberration. According to embodiments, reference is made below. Figures 6a to 10d Description Figure 6a Lens assembly 400, Figure 7a Lens assembly 500, Figure 8a Lens assembly 600, Figure 9a Lens assembly 700 and Figure 10a The lens assembly 800 can also satisfy the following [Formulas 1 to 5].

[0099] According to the embodiments, lens assemblies 300; 400; 500; 600; 700; 800 can satisfy the following [Formula 1].

[0100] [Formula 1] 65 <L1 Abbe<81 Here, L1 Abbe can be the Abbe number of the first lens L1 from the object O among multiple lenses L1, L2, L3, L4, L5 in lens assembly 300; 400; 500; 600; 700; 800 (or included in the lens group of lens assembly 300). According to an embodiment, when L1 Abbe of [Formula 1] is about 65 or less, the chromatic aberration minimization performance of the lens assembly can be degraded. When L1 Abbe of [Formula 1] is about 81 or greater, it may be difficult to manufacture the lens of the lens assembly as an aspherical surface.

[0101] According to the embodiments, lens assemblies 300; 400; 500; 600; 700; 800 can satisfy the following [Formula 2].

[0102] [Formula 2] 0.56 <EFL / OTTL<1.33 Here, OTTL is the distance from the vertex of the surface of the first lens L1 facing the object O from the object O side of the multiple lenses L1, L2, L3, L4, L5 of the lens assembly 300; 400; 500; 600; 700; 800 to the image sensor IS, and EFL can be the total focal length of the lens assembly 300; 400; 500; 600; 700; 800.

[0103] According to an embodiment, when the EFL / OTTL of [Formula 2] is about 0.56 or less, the size of the lens assembly can be larger, which may conflict with the requirements for thinning and miniaturization of the lens assembly or optical system. When the EFL / OTTL of [Formula 2] is about 1.33 or greater, the manufacturing sensitivity of the lens assembly can be increased.

[0104] According to the embodiments, lens assemblies 300; 400; 500; 600; 700; 800 can satisfy the following [Formula 3].

[0105] [Formula 3] 5 <FOV<28 In [Formula 3], FOV can be the total field of view of the lens assembly. According to the embodiment, lens assemblies 300; 400; 500; 600; 700; 800 can be folding optical systems with a field of view greater than about 5 degrees and less than about 28 degrees.

[0106] According to the embodiments, lens assemblies 300; 400; 500; 600; 700; 800 can satisfy the following [formula].

[0107] [Formula 4] 18 <LM1 Abbe<40 Here, LM1 Abbe can be the Abbe number of the lens closest to the object O among at least one of the multiple lenses L1, L2, L3, L4, L5 that has negative refractive power.

[0108] According to the embodiments, when the LM1 Abbe of [Formula 4] is about 18 or less, the manufacture of the lens may become difficult. When the LM1 Abbe of [Formula 4] is about 40 or greater, spherical aberration control may be difficult, and an increase in the number of lenses and a deterioration in aberration control performance may occur.

[0109] According to the embodiments, lens assemblies 300; 400; 500; 600; 700; 800 can satisfy the following [Formula 5].

[0110] [Formula 5] 2.0 <EFL / L1R1<5.5 Here, EFL is the total focal length of the lens assembly 300; 400; 500; 600; 700; 800, and L1R1 can be the curvature of the object-facing surface S2 of the first lens L1.

[0111] According to the embodiments, when the EFL / L1R1 of [Formula 5] is about 2.0 or less, the size of the lens assembly may become larger, which may conflict with the requirements for thinning and miniaturization of the lens assembly or optical system. When the EFL / L1R1 of [Formula 5] is about 5.5 or greater, the spherical aberration sensitivity may increase, thus making the control of spherical aberration difficult and increasing the manufacturing difficulty of the lens assembly.

[0112] Table 1 below shows the lens assembly 300 according to Embodiment 1 and according to the following reference. Figures 6a to 10d The values ​​related to [Formula 1 to Formula 5] for the lens assemblies 400; 500; 600; 700; 800 described in [Examples 2 to 6] are shown. Referring to [Table 1], it can be determined that the lens assemblies 300; 400; 500; 600; 700; 800 according to [Examples 1 to 6] satisfy the above [Formula 1 to Formula 5].

[0113] [Table 1]

[0114] Thus, lens assemblies 300; 400; 500; 600; 700; 800 according to embodiments of the present disclosure can be implemented as optical systems. According to embodiments, such lens assemblies 300; 400; 500; 600; 700; 800 can be implemented by satisfying and optimizing the above [Formulas 1 to 5]. In embodiments, the optical system including lens assembly 400 can be manufactured to conform to the shapes of the lenses L1, L2, L3, L4, L5 (e.g., lens surfaces) and the conditions presented by the above [Formulas 1 to 5], and has the specifications exemplified in the following [Table 2]. In [Table 2], lens surface 1 can exemplify the gap between the first lens L1 and the object O, and the measured value of its thickness can be the distance of the gap or air gap.

[0115] The lens assembly 300 implemented with the specifications in [Table 2] below can relate to a telephoto lens with a field of view (FOV) of approximately 14.61 degrees. Furthermore, the lens assembly 300 implemented with the specifications in [Table 2] below has a total focal length (EFL) of approximately 27 mm, an F-number (Fno) of approximately 4.869, an optical total length (OTTL) from the image plane of approximately 31.229 mm, a maximum image height (Max IH) of approximately 3.5 mm for the image sensor, and a total field of view (FOV) of approximately 14.61 degrees.

[0116] [Table 2]

[0117] The aspherical coefficients of lenses L1, L2, L3, L4, and L5 are listed in Tables 3 and 4 below, and the aspherical coefficients can be calculated using Equation 1 below.

[0118] [Equation 1]

[0119] Here, "z" represents the distance (sagitta) from the lens vertex along the optical axis OI, "c" represents the reciprocal of the radius of curvature at the lens vertex, "y" represents the distance along the direction perpendicular to the optical axis, "K'" represents the second-order constant, and "A", "B", "C", "D", "E", "F", "G", "H", "I", "J", "K", "L", "M", "N", and "O" can represent aspherical coefficients, respectively.

[0120] [Table 3]

[0121] [Table 4]

[0122] Figure 5bThis is a graph illustrating the spherical aberration of the lens assembly 300 according to an embodiment of the present disclosure, where the horizontal axis represents the coefficient of longitudinal spherical aberration, the vertical axis represents the normalized distance from the optical axis OI, and the variation of longitudinal spherical aberration with respect to the wavelength of light is shown. Longitudinal spherical aberration is shown for light having wavelengths of, for example, 656.2725 (NM), 587.5618 (NM), 546.0740 (NM), 486.1327 (NM), and 435.8343 (NM). Figure 5c This is a graph showing the astigmatism curve of a lens assembly 300 according to an embodiment of the present disclosure for light having a wavelength of 546.0740 (NM), where "X" represents the sagittal plane and "Y" represents the tangential or meridional plane. Figure 5d This is a graph showing the distortion of a lens assembly 300 according to an embodiment of the present disclosure for light having a wavelength of 546.0740 (NM).

[0123] [Example 2] Figure 6a This is a configuration diagram illustrating an optical system including a lens assembly and an image sensor according to an embodiment of the present disclosure. Figure 6b This illustrates an embodiment according to the present disclosure. Figure 6a A curve showing the spherical aberration of the lens assembly. Figure 6c This illustrates an embodiment according to the present disclosure. Figure 6a The astigmatism curve of the lens assembly. Figure 6d This illustrates an embodiment according to the present disclosure. Figure 6a A graph showing the distortion of the lens components.

[0124] Figure 6b This is a graph illustrating the spherical aberration of a lens assembly 400 according to an embodiment of the present disclosure, where the horizontal axis represents the coefficient of longitudinal spherical aberration, the vertical axis represents the normalized distance from the optical axis OI, and the variation of longitudinal spherical aberration with respect to the wavelength of light is shown. Longitudinal spherical aberration is shown for light having wavelengths of, for example, 656.2725 (NM), 587.5618 (NM), 546.0740 (NM), 486.1327 (NM), and 435.8343 (NM). Figure 6c This is a graph showing the astigmatism curve of a lens assembly 400 according to an embodiment of the present disclosure for light having a wavelength of 546.0740 (NM), where "X" represents the sagittal plane and "Y" represents the tangential or meridional plane. Figure 6d This is a graph showing the distortion of a lens assembly 400 according to an embodiment of the present disclosure for light having a wavelength of 546.0740 (NM).

[0125] In this embodiment, the configuration of the lens assembly 500 may be at least partially the same as described above. Figure 5a The lens assembly 300 described has the same or similar configuration and can satisfy the above [Formulas 1 to 5].

[0126] Reference Figure 6a The lens assembly 400 may include: a lens group comprising a plurality of (e.g., at least four or five) lenses L1, L2, L3, L4, L5; at least one reflecting element M; an aperture sto; and / or an image sensor IS. According to an embodiment, the lenses L1, L2, L3, L4, L5, the aperture sto, the reflecting element M, and / or the image sensor IS of the lens group may be substantially aligned on the optical axis OI.

[0127] According to an embodiment, the lens group or lenses L1, L2, L3, L4, L5 of the lens assembly 400 may include a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, and a fifth lens L5 sequentially arranged and / or aligned along the optical axis OI in the direction from the object O toward the image sensor IS. According to an embodiment, each of the lenses L1, L2, L3, L4, L5 and / or the reflecting member M may include an "object-side surface" as the surface facing the object O and an "image-side surface" as the surface facing the image I (or the image sensor IS). According to an embodiment, the lenses L1, L2, L3, L4, L5 may be formed of glass and / or synthetic resin (e.g., plastic) materials. According to an embodiment, at least some of the lenses L1, L2, L3, L4, L5 may have at least one of the object-side surface or the image-side surface formed as an aspherical surface.

[0128] According to an embodiment, the first lens (or first lens) L1, which is the lens closest to the object (or the first lens from the object), may have positive refractive power. According to an embodiment, the object-side surface S2 of the first lens L1 may have a convex shape. For example, the convex shape of the object-side surface S2 towards the object can suppress the increase in spherical aberration caused by the large apertures of lenses L1, L2, L3, L4, and L5. According to an embodiment, at least one of the object-side surface S2 and the image-side surface S3 of the first lens L1 may be formed aspherical.

[0129] According to an embodiment, some of the lenses L1, L2, L3, L4, and L5, including the first lens L1, can be extremely low dispersion lenses (or ultra-extreme low dispersion lenses). For example, such extremely low (or ultra-extreme low) dispersion lenses can be formed from a glass material that has been formed to have lower dispersion than ordinary glass, in order to reduce chromatic aberration. According to an embodiment, by setting some of the lenses L1, L2, L3, L4, and L5 of the lens assembly 400 as extremely low (or ultra-extreme low) dispersion lenses, chromatic aberration can be minimized and resolution can be enhanced.

[0130] According to an embodiment, lenses L1, L2, L3, L4, and L5 may include at least one lens with negative refractive power. According to an embodiment, at least one of the second lens L2 (as the second lens from the object side), the third lens L3 (as the third lens), the fourth lens L4 (as the fourth lens), and the fifth lens L5 (as the fifth lens) may have negative refractive power. According to an embodiment, the lens closest to the object side among at least one of the lenses L1, L2, L3, L4, and L5 with negative refractive power may have at least one of its object-side surface or image-side surface formed as an aspherical surface. According to an embodiment, the lens closest to the object side among at least one lens with negative refractive power may have its image-side surface have a concave shape.

[0131] In an embodiment, at least one of lenses L1, L2, L3, L4, L5 and / or image sensor IS can be configured to reciprocate along the optical axis OI. According to an embodiment, electronic devices (e.g., Figure 1 Electronic device 101 and / or Figure 3 and Figure 4 Electronic device 101) or processor (e.g., Figure 1 The processor 120 can be configured to focus or adjust the focal length by causing the lenses L1, L2, L3, L4, L5 and / or the image sensor IS to reciprocate along the optical axis OI.

[0132] According to an embodiment, a reflective member M may be disposed between the fifth lens L5 and the image sensor IS. The reflective member M may be an optical component configured to refract and / or reflect light entering the image sensor IS after passing through the lens assembly 400. For example, the path of the principal ray of a beam of light passing through the reflective member M may be parallel to the principal ray incident on the lens assembly 400. According to an embodiment, the reflective member M may include at least one mirror and / or at least one prism configured to refract and / or reflect light. For example, the reflective member M may be configured to change the path of light at least once. According to an embodiment, by including the reflective member M in the lens assembly 400, a folding optical system (or a folding camera) can be realized.

[0133] According to an embodiment, the aperture sto can be disposed between the second lens L2 and the third lens L3, and can be disposed or implemented adjacent to a surface of the third lens L3 (e.g., object surface S6). For example, lenses L3, L4, and L5 are substantially disposed between the aperture sto and the image sensor IS, and can focus the light incident through the aperture sto and allow the light to enter the image sensor IS.

[0134] According to an embodiment, the lens assembly 400 may further include an infrared cut-off filter F. According to an embodiment, the infrared cut-off filter F may include an object-side surface S14 facing the object O and an image-side surface S15 facing the image sensor IS. For example, in a lens assembly or electronic device 101 for detecting infrared light, the infrared cut-off filter F may be replaced by a pass filter that transmits infrared light and blocks visible light. For example, the infrared cut-off filter F may be aligned along the optical axis OI with a plurality of lenses L1, L2, L3, L4, L5, aperture S10, and / or image sensor IS of the lens group.

[0135] In an embodiment, the lens assembly 500 may be manufactured to the specifications illustrated in [Table 5] below, and may have the aspherical coefficients shown in [Table 6] and [Table 7]. In [Table 5], the lens surface 1 may illustrate the gap between the first lens L1 and the object O, and the measured value of its thickness may be the distance of the gap or air gap.

[0136] The lens assembly 400, implemented with the specifications in [Table 5] below, has a total focal length (EFL) of approximately 33 mm, an F-number (Fno) of approximately 3.753, an optical total length (OTTL) of approximately 42.104 mm from the image plane, a maximum image height (Max IH) of approximately 4.2 mm for the image sensor, and a total field of view (FOV) of approximately 14.53 degrees.

[0137] [Table 5]

[0138] The aspherical coefficients of lenses L1, L2, L3, L4, and L5 are listed in Tables 6 and 7 below, and can be calculated using Equation 1 described above with reference to Tables 3 and 4.

[0139] [Table 6]

[0140] [Table 7]

[0141] [Example 3] Figure 7a This is a configuration diagram illustrating an optical system including a lens assembly and an image sensor according to an embodiment of the present disclosure. Figure 7b This illustrates an embodiment according to the present disclosure. Figure 7a A curve showing the spherical aberration of the lens assembly. Figure 7c This illustrates an embodiment according to the present disclosure. Figure 7a The astigmatism curve of the lens assembly. Figure 7d This illustrates an embodiment according to the present disclosure. Figure 7a A graph showing the distortion of the lens components.

[0142] Figure 7b This is a graph illustrating the spherical aberration of a lens assembly 500 according to an embodiment of the present disclosure, where the horizontal axis represents the coefficient of longitudinal spherical aberration, the vertical axis represents the normalized distance from the optical axis OI, and the variation of longitudinal spherical aberration with respect to the wavelength of light is shown. Longitudinal spherical aberration is shown for light having wavelengths of, for example, 656.2725 (NM), 587.5618 (NM), 546.0740 (NM), 486.1327 (NM), and 435.8343 (NM). Figure 7c This is a graph showing the astigmatism curve of a lens assembly 500 according to an embodiment of the present disclosure for light having a wavelength of 546.0740 (NM), where "X" represents the sagittal plane and "Y" represents the tangential or meridional plane. Figure 7d This is a graph showing the distortion of a lens assembly 500 according to an embodiment of the present disclosure for light having a wavelength of 546.0740 (NM).

[0143] In this embodiment, the configuration of the lens assembly 500 may be at least partially the same as described above. Figure 5a The lens assembly 300 described has the same or similar configuration and can satisfy the above [Formulas 1 to 5].

[0144] Reference Figure 7a The lens assembly 500 may include: a lens group comprising a plurality of (e.g., at least four) lenses L1, L2, L3, L4; at least one reflecting element M; an aperture sto; and / or an image sensor IS. According to an embodiment, the lenses L1, L2, L3, L4, the aperture sto, the reflecting element M, and / or the image sensor IS of the lens group may be substantially aligned on the optical axis OI.

[0145] According to an embodiment, the lens group or lenses L1, L2, L3, L4 of the lens assembly 500 may include a first lens L1, a second lens L2, a third lens L3, and a fourth lens L4 sequentially arranged and / or aligned along the optical axis OI in the direction from the object O toward the image sensor IS. According to an embodiment, each of the lenses L1, L2, L3, L4 and / or the reflecting member M may include an "object-side surface" as the surface facing the object O and an "image-side surface" as the surface facing the image I (or the image sensor IS). According to an embodiment, the lenses L1, L2, L3, L4 may be formed of glass and / or synthetic resin (e.g., plastic) materials. According to an embodiment, at least some of the lenses L1, L2, L3, L4 may have at least one of the object-side surface or the image-side surface formed as an aspherical surface.

[0146] According to an embodiment, the first lens (or first lens) L1, which is the lens closest to the object (or the first lens from the object), may have positive refractive power. According to an embodiment, the object-side surface S2 of the first lens L1 may have a convex shape. For example, the convex shape of the object-side surface S2 towards the object can suppress the increase in spherical aberration caused by the large apertures of lenses L1, L2, L3, and L4. According to an embodiment, at least one of the object-side surface S2 and the image-side surface S3 of the first lens L1 may be formed aspherical.

[0147] According to an embodiment, some of the lenses L1, L2, L3, and L4, including the first lens L1, can be extremely low dispersion lenses (or ultra-extreme low dispersion lenses). For example, such extremely low (or ultra-extreme low) dispersion lenses can be formed from a glass material that has been formed to have lower dispersion than ordinary glass to reduce chromatic aberration. According to an embodiment, by setting some of the lenses L1, L2, L3, and L4 of the lens assembly 500 as extremely low (or ultra-extreme low) dispersion lenses, chromatic aberration can be minimized and resolution can be enhanced.

[0148] According to an embodiment, lenses L1, L2, L3, and L4 may include at least one lens having negative refractive power. According to an embodiment, at least one of the second lens L2 (as the second lens from the object side), the third lens L3 (as the third lens), and the fourth lens L4 (as the fourth lens) may have negative refractive power. According to an embodiment, the lens closest to the object side among at least one of the lenses L1, L2, L3, and L4 with negative refractive power may have at least one of the object-side surface or the image-side surface formed as an aspherical surface. According to an embodiment, the lens closest to the object side among at least one lens with negative refractive power may have a concave shape on the image-side surface.

[0149] In an embodiment, at least one of lenses L1, L2, L3, L4 and / or image sensor IS can be configured to reciprocate along the optical axis OI. According to an embodiment, electronic devices (e.g., Figure 1 Electronic device 101 and / or Figure 3 and Figure 4 Electronic device 101) or processor (e.g., Figure 1 The processor 120 can be configured to focus or adjust the focal length by causing the lenses L1, L2, L3, L4 and / or the image sensor IS to reciprocate along the optical axis OI.

[0150] According to an embodiment, the reflecting member M may be disposed in front of the first lens L1. In other words, the reflecting member M may be configured to face the object surface S2 of the first lens L1. According to an embodiment, the reflecting member M may be an optical member configured to change the path of incident light toward the lens assembly 500, and may include, for example, at least one mirror. For example, the reflecting member M may be configured to change the path of light at least once. According to an embodiment, the reflecting member M may include a reflective surface tilted relative to the optical axis OI to change the path of incident light toward the lens assembly 500. For example, the reflective surface of the reflecting member M may form an angle of about 25 degrees to about 45 degrees relative to the optical axis OI. For example, the reflecting member M may be configured to change the path of light at least once.

[0151] According to an embodiment, the aperture sto can be disposed between the third lens L3 and the fourth lens L4, and can be disposed or implemented adjacent to a surface of the fourth lens L4 (e.g., the object surface S8). For example, the fourth lens L4 is substantially disposed between the aperture sto and the image sensor IS, and can focus the light incident through the aperture sto and allow the light to enter the image sensor IS.

[0152] According to an embodiment, the lens assembly 500 may further include an infrared cut-off filter F. According to an embodiment, the infrared cut-off filter F may include an object-side surface S10 facing the object O and an image-side surface S11 facing the image sensor IS. For example, in a lens assembly or electronic device 101 for detecting infrared light, the infrared cut-off filter F may be replaced by a pass filter that transmits infrared light and blocks visible light. For example, the infrared cut-off filter F may be aligned along the optical axis OI with a plurality of lenses L1, L2, L3, L4, aperture S10, and / or image sensor IS of the lens group.

[0153] In an embodiment, the lens assembly 500 may be manufactured to the specifications illustrated in [Table 8] below, and may have the aspherical coefficients of [Table 9] and [Table 10]. In [Table 8], the lens surface 1 may illustrate the gap between the first lens L1 and the object O, and the measurement of its thickness may be the distance of the gap or air gap.

[0154] The lens assembly 500, implemented with the specifications in [Table 8] below, has a total focal length (EFL) of approximately 34.4 mm, an F-number (Fno) of approximately 5.959, an optical total length (OTTL) of approximately 30.504 mm from the image plane, a maximum image height (Max IH) of approximately 2.9 mm for the image sensor, and a total field of view (FOV) of approximately 9.58 degrees.

[0155] [Table 8]

[0156] The aspherical coefficients of lenses L1, L2, L3, and L4 are listed in Tables 9 and 10 below, and can be calculated using Equation 1 described above with reference to Tables 3 and 4.

[0157] [Table 9]

[0158] [Table 10]

[0159] [Example 4] Figure 8a This is a configuration diagram illustrating an optical system including a lens assembly and an image sensor according to an embodiment of the present disclosure. Figure 8b This illustrates an embodiment according to the present disclosure. Figure 8a A curve showing the spherical aberration of the lens assembly. Figure 8c This illustrates an embodiment according to the present disclosure. Figure 8a The astigmatism curve of the lens assembly. Figure 8d This illustrates an embodiment according to the present disclosure. Figure 8a A graph showing the distortion of the lens components.

[0160] Figure 8b This is a graph illustrating the spherical aberration of a lens assembly 600 according to an embodiment of the present disclosure, where the horizontal axis represents the coefficient of longitudinal spherical aberration, the vertical axis represents the normalized distance from the optical axis OI, and the variation of longitudinal spherical aberration with respect to the wavelength of light is shown. Longitudinal spherical aberration is shown for light having wavelengths of, for example, 656.2725 (nm), 587.5618 (nm), 546.0740 (nm), 486.1327 (nm), and 435.8343 (nm). Figure 8c This is a graph showing the astigmatism curve of a lens assembly 600 according to an embodiment of the present disclosure for light having a wavelength of 546.0740 (NM), where "X" represents the sagittal plane and "Y" represents the tangential or meridional plane. Figure 8d This is a graph showing the distortion of a lens assembly 600 according to an embodiment of the present disclosure for light having a wavelength of 546.0740 (NM).

[0161] In this embodiment, the configuration of the lens assembly 600 may be at least partially the same as described above. Figure 5a The lens assembly 300 described has the same or similar configuration and can satisfy the above [Formulas 1 to 5].

[0162] Reference Figure 8aThe lens assembly 600 may include: a lens group comprising a plurality of (e.g., at least four or five) lenses L1, L2, L3, L4, L5; at least one reflecting element M; an aperture sto; and / or an image sensor IS. According to an embodiment, the lenses L1, L2, L3, L4, L5, the aperture sto, the reflecting element M, and / or the image sensor IS of the lens group may be substantially aligned on the optical axis OI.

[0163] According to an embodiment, the lens group or lenses L1, L2, L3, L4, L5 of the lens assembly 600 may include a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, and a fifth lens L5 sequentially arranged and / or aligned along the optical axis OI in the direction from the object O toward the image sensor IS. According to an embodiment, each of the lenses L1, L2, L3, L4, L5 and / or the reflecting member M may include an "object-side surface" as the surface facing the object O and an "image-side surface" as the surface facing the image I (or the image sensor IS). According to an embodiment, the lenses L1, L2, L3, L4, L5 may be formed of glass and / or synthetic resin (e.g., plastic) materials. According to an embodiment, at least some of the lenses L1, L2, L3, L4, L5 may have at least one of the object-side surface or the image-side surface formed as an aspherical surface.

[0164] According to an embodiment, the first lens (or first lens) L1, which is the lens closest to the object (or the first lens from the object), may have positive refractive power. According to an embodiment, the object-side surface S2 of the first lens L1 may have a convex shape. For example, the convex shape of the object-side surface S2 towards the object can suppress the increase in spherical aberration caused by the large apertures of lenses L1, L2, L3, L4, and L5. According to an embodiment, at least one of the object-side surface S2 and the image-side surface S3 of the first lens L1 may be formed aspherical.

[0165] According to an embodiment, some of the lenses L1, L2, L3, L4, and L5, including the first lens L1, can be extremely low dispersion lenses (or ultra-extreme low dispersion lenses). For example, such extremely low (or ultra-extreme low) dispersion lenses can be formed from a glass material that has been formed to have lower dispersion than ordinary glass, in order to reduce chromatic aberration. According to an embodiment, by setting some of the lenses L1, L2, L3, L4, and L5 of the lens assembly 600 as extremely low (or ultra-extreme low) dispersion lenses, chromatic aberration can be minimized and resolution can be enhanced.

[0166] According to an embodiment, lenses L1, L2, L3, L4, and L5 may include at least one lens with negative refractive power. According to an embodiment, at least one of the second lens L2 (as the second lens from the object side), the third lens L3 (as the third lens), the fourth lens L4 (as the fourth lens), and the fifth lens L5 (as the fifth lens) may have negative refractive power. According to an embodiment, the lens closest to the object side among at least one of the lenses L1, L2, L3, L4, and L5 with negative refractive power may have at least one of its object-side surface or image-side surface formed as an aspherical surface. According to an embodiment, the lens closest to the object side among at least one lens with negative refractive power may have its image-side surface have a concave shape.

[0167] In an embodiment, at least one of lenses L1, L2, L3, L4, L5 and / or image sensor IS can be configured to reciprocate along the optical axis OI. According to an embodiment, electronic devices (e.g., Figure 1 Electronic device 101 and / or Figure 3 and Figure 4 Electronic device 101) or processor (e.g., Figure 1 The processor 120 can be configured to focus or adjust the focal length by causing the lenses L1, L2, L3, L4, L5 and / or the image sensor IS to reciprocate along the optical axis OI.

[0168] According to an embodiment, a reflective member M may be disposed between the fifth lens L5 and the image sensor IS. The reflective member M may be an optical component configured to refract and / or reflect light entering the image sensor IS after passing through the lens assembly 600. For example, the path of the principal ray of a beam of light passing through the reflective member M may be parallel to the principal ray incident on the lens assembly 600. According to an embodiment, the reflective member M may include at least one mirror and / or at least one prism configured to refract and / or reflect light. For example, the reflective member M may be configured to change the path of light at least once. According to an embodiment, by including the reflective member M in the lens assembly 600, a folding optical system (or a folding camera) can be realized.

[0169] According to an embodiment, the aperture sto can be disposed between the object O and the first lens L1, and can be implemented adjacent to a surface of the first lens L1 (e.g., the object-side surface S2) or on the object-side surface S2. For example, arranging the aperture sto in front of the object-side surface S2 of the first lens L1 can help reduce the field stop diameter of the optical system and minimize the aperture. For example, lenses L1, L2, L3, L4, and L5 are substantially disposed between the aperture sto and the image sensor IS, and can focus the light incident through the aperture sto and allow the light to enter the image sensor IS.

[0170] According to an embodiment, the lens assembly 600 may further include an infrared cut-off filter F. According to an embodiment, the infrared cut-off filter F may include an object-side surface S14 facing the object O and an image-side surface S15 facing the image sensor IS. For example, in a lens assembly or electronic device 101 for detecting infrared light, the infrared cut-off filter F may be replaced by a pass filter that transmits infrared light and blocks visible light. For example, the infrared cut-off filter F may be aligned along the optical axis OI with a plurality of lenses L1, L2, L3, L4, L5, aperture S10, and / or image sensor IS of the lens group.

[0171] In an embodiment, the lens assembly 600 may be manufactured to the specifications illustrated in [Table 11] and may have the aspherical coefficients shown in [Table 12] and [Table 13]. In [Table 11], the lens surface 1 may illustrate the gap between the first lens L1 and the object O, and the measurement of its thickness may be the distance of the gap or air gap.

[0172] The lens assembly 600, implemented with the specifications in [Table 11] below, has a total focal length (EFL) of approximately 18 mm, an F-number (Fno) of approximately 3, an optical total length (OTTL) of approximately 23.574 mm from the image plane, a maximum image height (Max IH) of approximately 3.5 mm for the image sensor, and a total field of view (FOV) of approximately 21.74 degrees.

[0173] [Table 11]

[0174] The aspherical coefficients of lenses L1, L2, L3, L4, and L5 are listed in Tables 12 and 13 below, and can be calculated using Equation 1 described above with reference to Tables 3 and 4.

[0175] [Table 12]

[0176] [Table 13]

[0177] [Example 5] Figure 9a This is a configuration diagram illustrating an optical system including a lens assembly and an image sensor according to an embodiment of the present disclosure. Figure 9b This illustrates an embodiment according to the present disclosure. Figure 9a A curve showing the spherical aberration of the lens assembly. Figure 9c This illustrates an embodiment according to the present disclosure. Figure 9a The astigmatism curve of the lens assembly. Figure 9d This illustrates an embodiment according to the present disclosure. Figure 9a A graph showing the distortion of the lens components.

[0178] Figure 9b This is a graph illustrating the spherical aberration of the lens assembly 700 according to an embodiment of the present disclosure, where the horizontal axis represents the longitudinal spherical aberration coefficient, the vertical axis represents the normalized distance from the optical axis OI, and the variation of longitudinal spherical aberration with the wavelength of light is shown. The longitudinal spherical aberration is shown for light having wavelengths of, for example, 656.2725 (NM), 587.5618 (NM), 546.0740 (NM), 486.1327 (NM), and 435.8343 (NM). Figure 9c This is a graph showing the astigmatism curve of a lens assembly 700 according to an embodiment of the present disclosure for light having a wavelength of 546.0740 (NM), where "X" represents the sagittal plane and "Y" represents the tangential or meridional plane. Figure 9d This is a graph showing the distortion of a lens assembly 700 according to an embodiment of the present disclosure for light having a wavelength of 546.0740 (NM).

[0179] In this embodiment, the configuration of the lens assembly 700 may be at least partially the same as described above. Figure 5a The lens assembly 300 described has the same or similar configuration and can satisfy the above [Formulas 1 to 5].

[0180] Reference Figure 9a The lens assembly 700 may include: a lens group comprising a plurality of (e.g., at least four) lenses L1, L2, L3, L4; at least one reflecting element M; an aperture sto; and / or an image sensor IS. According to an embodiment, the lenses L1, L2, L3, L4, the aperture sto, the reflecting element M, and / or the image sensor IS of the lens group may be substantially aligned on the optical axis OI.

[0181] According to an embodiment, the lens group or lenses L1, L2, L3, L4 of the lens assembly 700 may include a first lens L1, a second lens L2, a third lens L3, and a fourth lens L4 sequentially arranged and / or aligned along the optical axis OI in the direction from the object O toward the image sensor IS. According to an embodiment, each of the lenses L1, L2, L3, L4, and / or the reflecting member M may include an "object-side surface" as the surface facing the object O and an "image-side surface" as the surface facing the image I (or the image sensor IS). According to an embodiment, the lenses L1, L2, L3, L4 may be formed of glass and / or synthetic resin (e.g., plastic) materials. According to an embodiment, at least some of the lenses L1, L2, L3, L4 may have at least one of the object-side surface or the image-side surface formed as an aspherical surface.

[0182] According to an embodiment, the first lens (or first lens) L1, which is the lens closest to the object (or the first lens from the object), may have positive refractive power. According to an embodiment, the object-side surface S2 of the first lens L1 may have a convex shape. For example, the convex shape of the object-side surface S2 towards the object can suppress the increase in spherical aberration caused by the large apertures of lenses L1, L2, L3, and L4. According to an embodiment, at least one of the object-side surface S2 and the image-side surface S3 of the first lens L1 may be formed aspherical.

[0183] According to an embodiment, some of the lenses L1, L2, L3, and L4, including the first lens L1, can be extremely low dispersion lenses (or ultra-extreme low dispersion lenses). For example, such extremely low (or ultra-extreme low) dispersion lenses can be formed from a glass material that has been formed to have lower dispersion than ordinary glass, in order to reduce chromatic aberration. According to an embodiment, by setting some of the lenses L1, L2, L3, and L4 of the lens assembly 700 as extremely low (or ultra-extreme low) dispersion lenses, chromatic aberration can be minimized and resolution can be enhanced.

[0184] According to an embodiment, lenses L1, L2, L3, and L4 may include at least one lens having negative refractive power. According to an embodiment, at least one of the second lens L2 (as the second lens from the object side), the third lens L3 (as the third lens), and the fourth lens L4 (as the fourth lens) may have negative refractive power. According to an embodiment, the lens closest to the object side among at least one of the lenses L1, L2, L3, and L4 with negative refractive power may have at least one of its object-side surface or image-side surface formed aspherical. According to an embodiment, the lens closest to the object side among at least one lens with negative refractive power may have its image-side surface have a concave shape.

[0185] In an embodiment, at least one of lenses L1, L2, L3, L4 and / or image sensor IS can be configured to reciprocate along the optical axis OI. According to an embodiment, electronic devices (e.g., Figure 1 Electronic device 101 and / or Figure 3 and Figure 4 Electronic device 101) or processor (e.g., Figure 1 The processor 120 can be configured to focus or adjust the focal length by causing the lenses L1, L2, L3, L4 and / or the image sensor IS to reciprocate along the optical axis OI.

[0186] According to an embodiment, a reflective member M may be disposed between the fourth lens L4 and the image sensor IS. The reflective member M may be an optical component configured to refract and / or reflect light entering the image sensor IS after passing through the lens assembly 700. For example, the path of the principal ray of a beam of light passing through the reflective member M may be parallel to the principal ray incident on the lens assembly 700. According to an embodiment, the reflective member M may include at least one mirror and / or at least one prism configured to refract and / or reflect light. For example, the reflective member M may be configured to change the path of light at least once. According to an embodiment, by including the reflective member M in the lens assembly 700, a folding optical system (or a folding camera) can be realized.

[0187] According to an embodiment, the aperture sto can be disposed between the object O and the first lens L1, and can be implemented adjacent to a surface of the first lens L1 (e.g., the object-side surface S2) or on the object-side surface S2. For example, arranging the aperture sto in front of the object-side surface S2 of the first lens L1 can help reduce the field stop diameter of the optical system and minimize the aperture. For example, lenses L1, L2, L3, and L4 are substantially disposed between the aperture sto and the image sensor IS, and can focus the light incident through the aperture sto and allow the light to enter the image sensor IS.

[0188] According to an embodiment, the lens assembly 700 may further include an infrared cut-off filter F. According to an embodiment, the infrared cut-off filter F may include an object-side surface S12 facing the object O and an image-side surface S13 facing the image sensor IS. For example, in a lens assembly or electronic device 101 for detecting infrared light, the infrared cut-off filter F may be replaced by a pass filter that transmits infrared light and blocks visible light. For example, the infrared cut-off filter F may be aligned along the optical axis OI with a plurality of lenses L1, L2, L3, L4, aperture S10, and / or image sensor IS of the lens group.

[0189] In an embodiment, the lens assembly 800 may be manufactured to the specifications illustrated in [Table 14] below, and may have the aspherical coefficients shown in [Table 15] and [Table 16]. In [Table 14], the lens surface 1 may illustrate the gap between the first lens L1 and the object O, and the measurement of its thickness may be the distance of the gap or air gap.

[0190] The lens assembly 700, implemented with the specifications in [Table 14] below, has a total focal length (EFL) of approximately 17 mm, an F-number (Fno) of approximately 2.833, an optical total length (OTTL) of approximately 22.514 mm from the image plane, a maximum image height (Max IH) of approximately 3.5 mm for the image sensor, and a total field of view (FOV) of approximately 22.83 degrees.

[0191] [Table 14]

[0192] The following Tables 15 and 16 list the aspherical coefficients of lenses L1, L2, L3, L4, and L5, and the aspherical coefficients can be calculated using Equation 1 described above with reference to Tables 3 and 4.

[0193] [Table 15]

[0194] [Table 16]

[0195] [Example 6] Figure 10a This is a configuration diagram illustrating an optical system including a lens assembly and an image sensor according to an embodiment of the present disclosure. Figure 10b This illustrates an embodiment according to the present disclosure. Figure 10a A curve showing the spherical aberration of the lens assembly. Figure 10c This illustrates an embodiment according to the present disclosure. Figure 10a The astigmatism curve of the lens assembly. Figure 10d This illustrates an embodiment according to the present disclosure. Figure 10a A graph showing the distortion of the lens components.

[0196] Figure 10b This is a graph illustrating the spherical aberration of a lens assembly 800 according to an embodiment of the present disclosure, where the horizontal axis represents the coefficient of longitudinal spherical aberration, the vertical axis represents the normalized distance from the optical axis OI, and the variation of longitudinal spherical aberration with respect to the wavelength of light is shown. Longitudinal spherical aberration is shown for light having wavelengths of, for example, 656.2725 (NM), 587.5618 (NM), 546.0740 (NM), 486.1327 (NM), and 435.8343 (NM). Figure 10c This is a graph showing the astigmatism curve of a lens assembly 800 according to an embodiment of the present disclosure for light having a wavelength of 546.0740 (NM), where "X" represents the sagittal plane and "Y" represents the tangential or meridional plane. Figure 10d This is a graph showing the distortion of a lens assembly 800 according to an embodiment of the present disclosure for light having a wavelength of 546.0740 (NM).

[0197] In this embodiment, the configuration of the lens assembly 800 may be at least partially the same as described above. Figure 5a The lens assembly 300 described has the same or similar configuration and can satisfy the above [Formulas 1 to 5].

[0198] Reference Figure 10aThe lens assembly 800 may include: a lens group comprising a plurality of (e.g., at least four or five) lenses L1, L2, L3, L4, L5; at least one reflecting element M; an aperture sto; and / or an image sensor IS. According to an embodiment, the lenses L1, L2, L3, L4, L5, the aperture sto, the reflecting element M, and / or the image sensor IS of the lens group may be substantially aligned on the optical axis OI.

[0199] According to an embodiment, the lens group or lenses L1, L2, L3, L4, L5 of the lens assembly 800 may include a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, and a fifth lens L5 sequentially arranged and / or aligned along the optical axis OI in the direction from the object O toward the image sensor IS. According to an embodiment, each of the lenses L1, L2, L3, L4, L5 and / or the reflecting member M may include an "object-side surface" as the surface facing the object O and an "image-side surface" as the surface facing the image I (or the image sensor IS). According to an embodiment, the lenses L1, L2, L3, L4, L5 may be formed of glass and / or synthetic resin (e.g., plastic) materials. According to an embodiment, at least some of the lenses L1, L2, L3, L4, L5 may have at least one of the object-side surface or the image-side surface formed as an aspherical surface.

[0200] According to an embodiment, the first lens (or first lens) L1, which is the lens closest to the object (or the first lens from the object), may have positive refractive power. According to an embodiment, the object-side surface S2 of the first lens L1 may have a convex shape. For example, the convex shape of the object-side surface S2 towards the object can suppress the increase in spherical aberration caused by the large apertures of lenses L1, L2, L3, L4, and L5. According to an embodiment, at least one of the object-side surface S2 and the image-side surface S3 of the first lens L1 may be formed aspherical.

[0201] According to an embodiment, some of the lenses L1, L2, L3, L4, and L5, including the first lens L1, can be extremely low dispersion lenses (or ultra-extreme low dispersion lenses). For example, such extremely low (or ultra-extreme low) dispersion lenses can be formed from a glass material that has been formed to have lower dispersion than ordinary glass to reduce chromatic aberration. According to an embodiment, by setting some of the lenses L1, L2, L3, L4, and L5 of the lens assembly 800 as extremely low (or ultra-extreme low) dispersion lenses, chromatic aberration can be minimized and resolution can be enhanced.

[0202] According to an embodiment, lenses L1, L2, L3, L4, and L5 may include at least one lens with negative refractive power. According to an embodiment, at least one of the second lens L2 (as the second lens from the object side), the third lens L3 (as the third lens), the fourth lens L4 (as the fourth lens), and the fifth lens L5 (as the fifth lens) may have negative refractive power. According to an embodiment, the lens closest to the object side among at least one of the lenses L1, L2, L3, L4, and L5 with negative refractive power may have at least one of the object-side surface or the image-side surface formed as an aspherical surface. According to an embodiment, the lens closest to the object side among at least one lens with negative refractive power may have a concave shape on the image-side surface.

[0203] In an embodiment, at least one of lenses L1, L2, L3, L4, L5 and / or image sensor IS can be configured to reciprocate along the optical axis OI. According to an embodiment, electronic devices (e.g., Figure 1 Electronic device 101 and / or Figure 3 and Figure 4 Electronic device 101) or processor (e.g., Figure 1 The processor 120 can be configured to focus or adjust the focal length by causing the lenses L1, L2, L3, L4, L5 and / or the image sensor IS to reciprocate along the optical axis OI.

[0204] According to an embodiment, a reflective member M may be disposed between the fifth lens L5 and the image sensor IS. The reflective member M may be an optical component configured to refract and / or reflect light entering the image sensor IS after passing through the lens assembly 800. For example, the path of the principal ray of a beam of light passing through the reflective member M may be parallel to the principal ray incident on the lens assembly 800. According to an embodiment, the reflective member M may include at least one mirror and / or at least one prism configured to refract and / or reflect light. For example, the reflective member M may be configured to change the path of light at least once. According to an embodiment, by including the reflective member M in the lens assembly 800, a folding optical system (or a folding camera) can be realized.

[0205] According to an embodiment, the aperture sto can be disposed between the second lens L2 and the third lens L3, and can be disposed or implemented adjacent to a surface of the third lens L3 (e.g., object surface S6). For example, lenses L3, L4, and L5 are substantially disposed between the aperture sto and the image sensor IS, and can focus the light incident through the aperture sto and allow the light to enter the image sensor IS.

[0206] According to an embodiment, the lens assembly 800 may further include an infrared cut-off filter F. According to an embodiment, the infrared cut-off filter F may include an object-side surface S14 facing the object O and an image-side surface S15 facing the image sensor IS. For example, in a lens assembly or electronic device 101 for detecting infrared light, the infrared cut-off filter F may be replaced by a pass filter that transmits infrared light and blocks visible light. For example, the infrared cut-off filter F may be aligned along the optical axis OI with a plurality of lenses L1, L2, L3, L4, L5, aperture S10, and / or image sensor IS of the lens group.

[0207] In an embodiment, the lens assembly 800 may be manufactured to the specifications illustrated in [Table 17] below, and may have the aspherical coefficients of [Table 18] and [Table 19]. In [Table 17], the lens surface 1 may illustrate the gap between the first lens L1 and the object O, and the measurement of its thickness may be the distance of the gap or air gap.

[0208] The lens assembly 800, implemented with the specifications in [Table 17] below, has a total focal length (EFL) of approximately 32.9 mm, an F-number (Fno) of approximately 3.749, an optical total length (OTTL) of approximately 40.731 mm from the image plane, a maximum image height (Max IH) of approximately 4.2 mm for the image sensor, and a total field of view (FOV) of approximately 14.56 degrees.

[0209] [Table 17]

[0210] The following Tables 18 and 19 list the aspherical coefficients of lenses L1, L2, L3, L4, and L5, and these coefficients can be calculated using Equation 1 described above with reference to Table 3.

[0211] [Table 18]

[0212] [Table 19]

[0213] Lens assemblies (or optical systems) comprising multiple lenses can be applied to camera modules of various electronic devices (e.g., smartphones, tablet PCs, smartwatches, drones). Typically, aberrations due to the shape of the lenses occur in optical systems, and these aberrations need to be minimized to provide good optical performance. Lens assemblies 300; 400; 500; 600; 700; 800 according to embodiments of this disclosure can, by design, alter the path of light reaching the image sensor IS by including a reflective member M that reflects and / or refracts incident light. For example, by including such a reflective member M, the orientation of the imaging plane img of the image sensor IS can be designed differently relative to the arrangement of lenses L1, L2, L3, L4, L5. Therefore, optical systems (or imaging devices or camera modules) with high optical performance (e.g., telephoto performance) can be realized in miniaturized and lightweight electronic devices such as smartphones (e.g., smartphones, tablet PCs, smartwatches, drones). Figure 1 , Figure 3 and Figure 4 In the electronic device 101). The lens assembly according to embodiments of the present disclosure can suppress or minimize chromatic aberration caused by the reflective member M by a combination of the refractive power, shape and material of the lens, thereby providing high-resolution images while providing good telephoto performance.

[0214] The technical problems to be solved from the disclosure of this document are not limited to the above-mentioned technical problems, and other technical problems not mentioned can be clearly understood by those skilled in the art from the description of this document.

[0215] The effects obtained from the disclosure of this document are not limited to those described above, and other effects not mentioned can be clearly understood by those skilled in the art from the description in this document.

[0216] According to embodiments of this disclosure, an electronic device including a lens assembly can be provided. The lens assembly 300; 400; 500; 600; 700 may include: a lens group including a plurality of lenses L1, L2, L3, L4, L5 aligned along the optical axis OI in a direction from the object O side to the image I side; an image sensor IS including an imaging plane img on which an image is formed; and at least one reflecting member M. The first lens L1 of the plurality of lenses, starting from the object side, may have positive refractive power. At least one of the object-facing surface S2 and the image-facing surface S3 of the first lens L1 may be formed aspherical, and the object-facing surface S2 of the first lens L1 may be formed convex. The lens closest to the object side among the at least one lens with negative refractive power included in the lens group may have at least one of its object-facing surface or its image-facing surface formed aspherical, and the image-facing surface may be formed concave. The lens assembly may satisfy the following [Formula 1] to [Formula 3].

[0217] [Formula 1] 65 <L1 Abbe<81 [Formula 2] 0.56 <EFL / OTTL<1.33 [Formula 3] 5 <FOV<28 (Where, L1 Abbe in [Formula 1] is the Abbe number of the first lens L1 from the object side among multiple lenses, OTTL in [Formula 2] is the distance from the vertex of the object-facing surface of the first lens L1 to the image sensor, EFL in [Formula 2] is the total focal length of the lens assembly, and FOV in [Formula 3] is the total field of view of the lens assembly.) According to the embodiment, the lens assembly can satisfy the following [Formula 4].

[0218] 18 <LM1 Abbe<40 (Where, LM1 Abbe in [Formula 4] is the Abbe number of the lens closest to the object side in at least one lens with negative refractive power included in the lens group.) According to an embodiment, the lens assembly can satisfy the following [Formula 5].

[0219] 2.0 <EFL / L1R1<5.5 (Where, EFL is the total focal length of the lens assembly, and L1R1 is the curvature of the object-facing surface S2 of the first lens L1.)

[0220] According to an embodiment, the electronic device can be configured to adjust the focus of the lens assembly by moving at least one of a plurality of lenses or at least one of an image sensor.

[0221] According to an embodiment, at least one reflecting member may be disposed between the first lens L1 and the second lens L2 from the object side, or may be disposed on the object-facing surface S2 of the first lens L1 from the object side.

[0222] According to an embodiment, the lens assembly may further include an infrared cut-off filter F disposed between the lens group and the image sensor.

[0223] According to an embodiment, at least one reflective element may be disposed between the lens group and the image sensor.

[0224] According to an embodiment, the electronic device may further include an infrared cutoff filter F disposed between the reflective member and the image sensor.

[0225] According to an embodiment, at least one reflective member may include at least one of at least one reflector or at least one prism.

[0226] According to an embodiment, at least one reflective member can be configured to reflect incident light at least once within at least one reflective member.

[0227] According to an embodiment, at least one of the plurality of lenses may include a glass material.

[0228] According to an embodiment, the first lens L1 among a plurality of lenses, starting from the object side, can be formed of glass material.

[0229] According to embodiments of this disclosure, a lens assembly 300; 400; 500; 600; 700 may include: a lens group comprising a plurality of lenses L1, L2, L3, L4, L5 aligned along the optical axis OI in a direction from the object O side to the image I side; an image sensor IS including an imaging plane img on which an image is formed; and at least one reflecting member M. The first lens L1 among the plurality of lenses, starting from the object side, may have positive refractive power. At least one of the object-facing surface S2 and the image-facing surface S3 of the first lens L1 may be formed aspherical, and the object-facing surface S2 of the first lens L1 may be formed convex. The lens closest to the object side among at least one lens with negative refractive power in the lens group may have at least one object-facing surface formed aspherical or an image-facing surface formed aspherical, and the image-facing surface may be formed concave. The lens assembly may satisfy the following [Formula 1] to [Formula 3].

[0230] [Formula 1] 65 <L1 Abbe<81 [Formula 2] 0.56 <EFL / OTTL<1.33 [Formula 3] 5 <FOV<28 (Where, L1 Abbe in [Formula 1] is the Abbe number of the first lens L1 from the object side among multiple lenses, OTTL in [Formula 2] is the distance from the vertex of the object-facing surface of the first lens L1 to the image sensor, EFL in [Formula 2] is the total focal length of the lens assembly, and FOV in [Formula 3] is the total field of view of the lens assembly.) According to the embodiment, the lens assembly can satisfy the following [Formula 4].

[0231] 18 <LM1 Abbe<40 (Where, LM1 Abbe in [Formula 4] is the Abbe number of the lens closest to the object side in at least one lens with negative refractive power included in the lens group.) According to an embodiment, the lens assembly can satisfy the following [Formula 5].

[0232] 2.0 <EFL / L1R1<5.5 (Where, EFL is the total focal length of the lens assembly, and L1R1 is the curvature of the object-facing surface S2 of the first lens L1.) According to an embodiment, the lens assembly can be configured to focus by moving at least one of a plurality of lenses or at least one of an image sensor.

[0233] According to an embodiment, at least one reflecting member may be disposed between the first lens L1 and the second lens L2 from the object side, or may be disposed on the object-facing surface S2 of the first lens L1 from the object side.

[0234] According to an embodiment, at least one reflective element may be disposed between the lens group and the image sensor.

[0235] According to an embodiment, at least one reflective member may include at least one of at least one reflector or at least one prism.

[0236] According to an embodiment, at least one of the plurality of lenses may include a glass material.

[0237] The embodiments disclosed herein should be understood as examples and not as limitations thereof. It will be apparent to those skilled in the art that various changes may be made to form and detail (including the appended claims and their equivalents) without departing from the overall scope disclosed herein.

[0238] The electronic device according to embodiments of this disclosure can be one of various types of electronic devices. 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. According to embodiments of this disclosure, the electronic device is not limited to those described above.

[0239] The embodiments of this disclosure and the terminology used therein are not intended to limit the technical features described herein to particular embodiments, and should be understood to include various modifications, equivalents, or alternatives to the embodiments. Similar reference numerals may be used for similar or related components in conjunction with the description of the accompanying drawings. It will be understood that a noun in the singular form corresponding to an item may include one or more things unless the relevant context explicitly indicates otherwise. As used herein, each of 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” may include all possible combinations of items listed together in the corresponding phrase. Terms such as “first,” “second,” or “1st” or “2nd” may be used simply to distinguish a corresponding component from another corresponding component and do not limit the corresponding component in other respects (e.g., importance or order). It will be understood that, whether the terms “operably” or “communically” are used or not, if an element (e.g., a first element) is referred to as “combined with another element (e.g., a second element),” “combined to another element (e.g., a second element),” “connected to another element (e.g., a second element),” or “connected to another element (e.g., a second element)”, it means that the element can be directly (e.g., wiredly) connected to the other element, wirelessly connected to the other element, or connected to the other element via a third element.

[0240] As used herein, the term "module" can include units implemented in hardware, software, or firmware, and is used interchangeably with other terms such as "logic," "logic block," "part," or "circuit." A module can be a single integrated component adapted to perform one or more functions, or the smallest unit or part of such a single integrated component. For example, according to an embodiment, a module can be implemented as an application-specific integrated circuit (ASIC).

[0241] Embodiments of this disclosure can be implemented as software (e.g., program 140) containing one or more instructions readable by a machine (e.g., electronic device 101) stored in a storage medium (e.g., internal memory 136 or external memory 138). For example, a processor (e.g., processor 120) of the machine (e.g., electronic device 101) can invoke at least one of the instructions stored in the storage medium and execute it with or without one or more other components under the control of the processor. This allows the machine to be operated to perform at least one function according to the invoked at least one instruction. 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. The term "non-transitory" means only that the storage medium is a tangible device and does not include signals (e.g., electromagnetic waves), but this term does not distinguish between data being stored semi-permanently in the storage medium and data being temporarily stored in the storage medium.

[0242] According to embodiments, methods according to embodiments of this disclosure can be included and provided in a computer program product. The computer program product can be traded as a commodity between a seller and a buyer. The computer program product can be distributed in the form of a machine-readable storage medium (e.g., a compact disk read-only memory (CD-ROM)) or via an app store (e.g., the Play Store). TM The computer program product may be published online (e.g., downloaded or uploaded) or distributed directly between two user devices (e.g., smartphones) (e.g., downloaded or uploaded). If published online, at least a portion of the computer program product may be temporarily generated, or at least a portion of the computer program product may be temporarily stored in a machine-readable storage medium (such as the memory of a manufacturer's server, an app store's server, or a forwarding server).

[0243] According to embodiments, each of the above components (e.g., a module or program) may include a single entity or multiple entities. Some of the multiple entities may be located in different components. According to embodiments, one or more of the above components may be omitted, or one or more other components may be added. Optionally or additionally, multiple components (e.g., modules or programs) may be integrated into a single component. In this case, according to various embodiments, the integrated component may still perform the one or more functions of each of the multiple components in the same or similar manner as the corresponding component of the multiple components performed one or more functions before integration. According to various embodiments, the operations performed by a module, program, or other component may be performed sequentially, in parallel, repeatedly, or heuristically, or one or more of the operations may be run in a different order or omitted, or one or more other operations may be added.

Claims

1. An electronic device including a lens assembly, in, The lens assembly (300; 400; 500; 600; 700) includes: The lens group includes multiple lenses (L1, L2, L3, L4, L5) aligned along the optical axis (OI) in the direction from the object (O) side to the image (I) side. An image sensor (IS) includes an imaging plane (img) on ​​which an image (I) is formed; and At least one reflective element (M). Among the plurality of lenses, the first lens (L1) closest to the object side has positive refractive power, and at least one of the object-facing surface (S2) or the image-facing surface (S3) of the first lens (L1) is formed aspherical, and the object-facing surface (S2) of the first lens (L1) is formed convex. In the lens group comprising at least one lens with negative refractive power, the lens closest to the object side has at least one of its object-facing surface or its image-facing surface formed as an aspherical surface, and the image-facing surface is formed concave. The lens assembly satisfies the following [Formula 1] to [Formula 3]. [Formula 1] 65 <L1 Abbe<81 [Formula 2] 0.56 <EFL / OTTL<1.33 [Formula 3] 5 <FOV<28 (Where, L1 Abbe in [Formula 1] is the Abbe number of the first lens (L1) from the object side among the plurality of lenses, OTTL in [Formula 2] is the distance from the vertex of the object-facing surface of the first lens (L1) to the image sensor, EFL in [Formula 2] is the total focal length of the lens assembly, and FOV in [Formula 3] is the total field of view of the lens assembly).

2. The electronic device according to claim 1, wherein, The lens assembly satisfies the following [Formula 4]: 18 <LM1 Abbe<40 (Where, LM1 Abbe in [Formula 4] is the Abbe number of the lens closest to the object side in at least one lens with negative refractive power included in the lens group).

3. The electronic device according to claim 1 or 2, wherein, The lens assembly satisfies the following [Formula 5]: 2.0 <EFL / L1R1<5.5 (Where, EFL is the total focal length of the lens assembly, and L1R1 is the curvature of the object-facing surface (S2) of the first lens (L1).) 4. The electronic device according to any one of claims 1 to 3, wherein, The electronic device is configured to adjust the focus of the lens assembly by moving at least one of the following: at least one of the plurality of lenses; or the image sensor.

5. The electronic device according to any one of claims 1 to 4, wherein, The at least one reflecting member is disposed between the first lens (L1) and the second lens (L2) from the object side, or is configured as an object-facing surface (S2) facing the first lens (L1).

6. The electronic device according to any one of claims 1 to 5, wherein, The lens assembly further includes an infrared cut-off filter (F) disposed between the lens group and the image sensor.

7. The electronic device according to any one of claims 1 to 4, wherein, The at least one reflective element is disposed between the lens group and the image sensor.

8. The electronic device according to claim 7, further comprising: An infrared cutoff filter (F) is disposed between the reflective member and the image sensor.

9. The electronic device according to any one of claims 1 to 8, wherein, The at least one reflective member includes at least one mirror or at least one prism.

10. The electronic device according to any one of claims 1 to 9, wherein, The at least one reflective element is configured to reflect incident light at least once within the at least one reflective element.

11. The electronic device according to any one of claims 1 to 10, wherein, At least one of the plurality of lenses comprises a glass material.

12. The electronic device according to any one of claims 1 to 11, wherein, The first lens (L1) of the plurality of lenses, starting from the object side, is made of glass.

13. A lens assembly (300; 400; 500; 600; 700), comprising: The lens group includes multiple lenses (L1, L2, L3, L4, L5) aligned along the optical axis (OI) in the direction from the object (O) side to the image (I) side. An image sensor (IS) includes an imaging plane (img) on ​​which an image (I) is formed; as well as At least one reflective element (M). Among the plurality of lenses, the first lens (L1) from the object side has positive refractive power, and at least one of the object-facing surface (S2) or the image-facing surface (S3) of the first lens (L1) is formed aspherical, and the object-facing surface (S2) of the first lens (L1) is formed convex. The lens closest to the object side in at least one lens with negative refractive power in the lens group has at least one of its object-facing surface or image-facing surface formed aspherical, and the image-facing surface is formed concave. The lens assembly satisfies the following [Formula 1] to [Formula 3]: [Formula 1] 65 <L1 Abbe <81 [Formula 2] 0.56 <EFL / OTTL<1.33 [Formula 3] 5 <FOV<28 (Where, L1 Abbe in [Formula 1] is the Abbe number of the first lens (L1) from the object side among the plurality of lenses, OTTL in [Formula 2] is the distance from the vertex of the object-facing surface of the first lens (L1) to the image sensor, EFL in [Formula 2] is the total focal length of the lens assembly, and FOV in [Formula 3] is the total field of view of the lens assembly).

14. The lens assembly according to claim 13, wherein, The lens assembly satisfies the following [Formula 4]: 18 <LM1 Abbe<40 (Where, LM1 Abbe in [Formula 4] is the Abbe number of the lens closest to the object side in at least one lens with negative refractive power included in the lens group).

15. The lens assembly according to claim 13 or claim 14, wherein, The lens assembly satisfies the following [Formula 5]: 2.0 <EFL / L1R1<5.5 (Where, EFL is the total focal length of the lens assembly, and L1R1 is the curvature of the object-facing surface (S2) of the first lens (L1).)

Images