Lens assembly and electronic device including same

Abstract

The invention discloses an electronic device and a camera assembly. The electronic device may include a camera assembly, in which the camera assembly may include at least four lenses, an image sensor, and at least one reflecting member that refracts or reflects incident light twice or more, in which an object side and an image side of a first lens on an object side of the at least four lenses are aspheric formed, and an image side of a second lens on the object side of the at least four lenses is aspheric formed. The object side and the image side are formed to be convex and may satisfy various relationships between a back focal length (BFL), an effective focal length (EFL), and a field of view (FOV).

Description

Technical Field

[0001] Various embodiments of the present disclosure relate to a lens assembly, and more particularly, to a lens assembly including a curved optical system and an electronic device including the lens assembly. Background Art

[0002] However, since the total length (e.g., the total length and / or height along the optical axis) of a compact electronic device such as a portable terminal is limited, it may be difficult to ensure a sufficient telephoto ratio for implementing the functionality of a telephoto lens. Here, "the total length of the lens assembly is limited" may mean that the number of lenses included in the lens assembly is limited. The limitation on the number of lenses included in the lens assembly may make it difficult to obtain high-quality images and / or videos. Using only a limited number of lenses, it may be difficult to manufacture a lens assembly with a low F value and small aberrations.

[0003] In order to overcome these disadvantages, a technology has been proposed for easily housing a lens assembly capable of ensuring a sufficient telephoto ratio in an electronic device by forming a folded optical system, wherein the folded optical system is configured to reflect or refract an optical path at least twice by placing a reflective member (e.g., a plane mirror or a prism) before the lens assembly.

[0004] As a folded optical system, a method for placing two reflective members before / after and placing a lens assembly between the two reflective members and a method for placing a reflective member between the lens assembly and the image sensor have been conventionally conceived. In the former case, since the lens assembly is disposed between the two reflective members, it may be limited to increase the module size, and it may be difficult to align the optical path and manufacture a low F-number optical system. In contrast, in the latter case, since the reflective member is disposed between the lens assembly and the image sensor, the lens assembly may be separated from the reflective member. Therefore, in the latter case, it may be easier to manufacture a low F-number optical system than in the former case. In addition, the latter case can provide easier optical path alignment than in the former case. In addition, the latter case can provide easier module size adjustment than in the former case.

[0005] The above information may be provided as background for the purpose of assisting understanding of the present disclosure. No statement or assertion is made as to whether any of the foregoing is applicable as background art relevant to the present disclosure. Summary of the invention

[0006]

Technical solution

[0007] According to an embodiment of the present disclosure, an electronic device is disclosed, including: a lens assembly in which at least four lenses are aligned along an optical axis in a direction from an object side to an image side; an image sensor including an imaging plane on which an image is formed; and at least one reflecting member disposed between the lens assembly and the image sensor, wherein the reflecting member is configured to refract or reflect light at least twice, wherein at least one of an object-side surface and an image-side surface of a first lens starting from the object side among the at least four lenses is formed as an aspherical surface, wherein the object-side surface and the image-side surface are formed as convex surfaces, and wherein the electronic device satisfies conditional equation 1 and conditional equation 2 described below:

[0008] [Conditional equation 1]

[0009] 0.6 < BFL / EFL < 1.1

[0010] [Conditional equation 2]

[0011] 15 < FOV < 35, where in conditional equation 1, BFL is a back focal length indicating a distance from an image-side surface of a lens closest to the imaging plane to the image sensor, EFL is an effective focal length indicating a total focal length of the lens assembly, and in conditional equation 2, FOV is a field of view of an entire optical system including the lens assembly.

[0012] According to an embodiment of the present disclosure, an electronic device is disclosed, including: a lens assembly in which at least four lenses are aligned along an optical axis in a direction from an object side to an image side; an image sensor including an imaging plane on which an image is formed; and at least one reflecting member disposed between the lens assembly and the image sensor, wherein the at least one reflecting member is configured to change a path of light at least twice, wherein a path of a chief ray passing through the at least one reflecting member is parallel to a path of a chief ray incident on the lens assembly, and wherein the electronic device satisfies the following conditional equation 1 and conditional equation 2:

[0013] [Conditional equation 1]

[0014] 0.6 < BFL / EFL < 1.1

[0015] [Conditional equation 2]

[0016] 15 < FOV < 35,

[0017] Wherein, in conditional equation 1, BFL is the back focal length indicating the distance from the image-side surface of the lens closest to the imaging plane to the image sensor, and EFL is the effective focal length indicating the overall focal length of the lens assembly, and in conditional equation 2, FOV is the field of view of the entire optical system including the lens assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a diagram showing an electronic device in a network environment according to various embodiments;

[0019] Figure 2 is a block diagram illustrating a camera module according to various embodiments;

[0020] Figure 3a is a view showing a configuration of a lens assembly according to an embodiment;

[0021] Figure 3b It is shown Figure 3a A view of the configuration of the example;

[0022] Figure 3c It is shown Figure 3a A view of the configuration of the example;

[0023] Figure 4a It is shown Figure 3a A graph of spherical aberration of a lens assembly;

[0024] Figure 4b It is shown Figure 3a A graph of astigmatism of a lens assembly;

[0025] Figure 4c It is shown Figure 3a A graph of the distortion of the lens assembly;

[0026] Figure 5 is a view showing a configuration of a lens assembly according to an embodiment;

[0027] Figure 6a It is shown Figure 5 A graph of spherical aberration of a lens assembly;

[0028] Figure 6b It is shown Figure 5 A graph of astigmatism of a lens assembly;

[0029] Figure 6c It is shown Figure 5 A graph of the distortion of the lens assembly;

[0030] Figure 7 is a view showing a configuration of a lens assembly according to an embodiment;

[0031] Figure 8a It is shown Figure 7 A graph of spherical aberration of a lens assembly;

[0032] Figure 8b It is shown Figure 7 A graph of astigmatism of a lens assembly;

[0033] Figure 8c It is shown Figure 7 A graph of the distortion of the lens assembly;

[0034] Fig. 9 is a view showing a configuration of a lens assembly according to an embodiment;

[0035] Fig.10a It is shown Fig. 9 A graph of spherical aberration of a lens assembly;

[0036] Fig.10b It is shown Fig. 9 A graph of astigmatism of a lens assembly;

[0037] Fig.10c It is shown Fig. 9 A graph of the distortion of the lens assembly,

[0038] Fig.11 is a view showing a configuration of a lens assembly according to an embodiment;

[0039] Fig.12a It is shown Fig.11 A graph of spherical aberration of a lens assembly;

[0040] Figure 12b It is shown Fig.11 A graph of the astigmatism of a lens assembly,

[0041] Fig.12c It is shown Fig.11 A graph of the distortion of the lens assembly,

[0042] Fig.13 is a view showing a configuration of a lens assembly according to an embodiment;

[0043] Fig.14a It is shown Fig.13 A graph of spherical aberration of a lens assembly;

[0044] Fig.14b It is shown Fig.13 A graph of astigmatism of a lens assembly;

[0045] Fig.14c It is shown Fig.13 A graph of the distortion of a lens assembly. DETAILED DESCRIPTION

[0046] In the folded optical system, even a method of placing a reflective member between the lens assembly and the image sensor may have difficulties in aberration control and sensitivity control of the optical system depending on the number of lenses and the material of the lens assembly.

[0047] For example, a lens assembly including a small number of lenses (e.g., three or less) may have difficulty in aberration control due to an inability to ensure a number of lenses sufficient to correct aberrations. In addition, since the image size is very small corresponding to a lens assembly including a small number of lenses (e.g., three or less), it may be difficult to obtain a high-quality image. As an example, when a lens is formed of glass, spherical glass may generally be used due to increased weight and manufacturing costs and difficulty in manufacturing in an aspherical shape. For example, when a lens assembly includes a plurality of lenses arranged along an optical axis, if the first lens from the object side is formed of a spherical glass lens, the remaining lenses should be correspondingly formed to have a small curvature, and the sensitivity of the optical system may increase.

[0048] According to the present disclosure, various embodiments are provided that provide shapes and materials of lenses for realizing smaller modules while having the number and materials of lenses effective for aberration control and sensitivity control.

[0049] Figure 1 1 is a block diagram illustrating an electronic device 101 in a network environment 100 according to various embodiments. Figure 1 , the electronic device 101 in the network environment 100 may communicate with at least one of the electronic devices 102 via a first network 198 (e.g., a short-range wireless communication network), or communicate with the electronic device 104 or the server 108 via a second network 199 (e.g., a long-range wireless communication network). According to an embodiment, the electronic device 101 may communicate with the electronic device 104 via the server 108. According to an embodiment, the 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 user identification module (SIM) 196, or an antenna module 197. In some embodiments, at least one of the above components (e.g., the connection terminal 178) may be omitted from the electronic device 101, or one or more other components may be added to the electronic device 101. According to an embodiment, some of the above-described components (eg, the sensor module 176, the camera module 180, or the antenna module 197) may be integrated into a single component (eg, the display module 160).

[0050] The processor 120 may run, for example, software (e.g., program 140) to control at least one other component (e.g., hardware component or software component) of the electronic device 101 connected to the processor 120, and may perform various data processing or calculations. According to one embodiment, as at least part of the data processing or calculation, the processor 120 may store a command or data received from another component (e.g., sensor module 176 or communication module 190) in the volatile memory 132, process the command or data stored in the volatile memory 132, and store the resultant data in the non-volatile memory 134. According to an embodiment, the processor 120 may include a main processor 121 (e.g., a central processing unit (CPU) or an application processor (AP)) or an auxiliary processor 123 (e.g., a graphics processing unit (GPU), a neural processing unit (NPU), an image signal processor (ISP), a sensor hub processor, or a communication processor (CP)) that is operationally independent or combined with the main processor 121. For example, when the electronic device 101 includes a main processor 121 and an auxiliary processor 123, the auxiliary processor 123 may be configured to consume less power than the main processor 121, or to be dedicated to a specified function. The auxiliary processor 123 may be implemented separately from the main processor 121, or as part of the main processor 121.

[0051] When the main processor 121 is in an inactive (e.g., sleep) state, the auxiliary processor 123 (rather than the main processor 121) may control at least some of the functions or states related to at least one component among the components of the electronic device 101 (e.g., the display module 160, the sensor module 176, or the communication module 190), or when the main processor 121 is in an active state (e.g., running an application), the auxiliary processor 123 may control at least some of the functions or states related to at least one component among the components of the electronic device 101 (e.g., the display module 160, the sensor module 176, or the communication module 190) together with the main processor 121. According to an embodiment, the auxiliary processor 123 (e.g., an image signal processor or a communication processor) may be implemented as part of another component (e.g., a camera module 180 or a communication module 190) that is functionally related to the auxiliary processor 123. According to an embodiment, the auxiliary processor 123 (e.g., a neural processing unit) may include a hardware structure dedicated to artificial intelligence model processing. The artificial intelligence model may be generated by machine learning. For example, such learning may be performed by the electronic device 101 where the artificial intelligence is executed 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, for example. The artificial intelligence model may include multiple artificial neural network layers. 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 alternatively, the artificial intelligence model may include a software structure in addition to a hardware structure.

[0052] The memory 130 may store various data used by at least one component of the electronic device 101 (e.g., the processor 120 or the sensor module 176). The various data may include, for example, software (e.g., the program 140) and input data or output data for commands related thereto. The memory 130 may include a volatile memory 132 or a nonvolatile memory 134.

[0053] The program 140 may be stored as software in the memory 130 , and may include, for example, an operating system (OS) 142 , middleware 144 , or applications 146 .

[0054] The input module 150 may receive commands or data to be used by other components (e.g., the processor 120) of the electronic device 101 from outside (e.g., a user) of the electronic device 101. The input module 150 may include, for example, a microphone, a mouse, a keyboard, a key (e.g., a button), or a digital pen (e.g., a stylus).

[0055] 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. Depending on the embodiment, the receiver can be implemented as a separate part from the speaker, or as part of the speaker.

[0056] The display module 160 may visually provide information to the outside of the electronic device 101 (e.g., a user). The display module 160 may include, for example, a display, a holographic device, or a projector, and a control circuit for controlling a corresponding one of the display, the holographic device, and the projector. According to an embodiment, the display module 160 may include a touch sensor configured to detect a touch or a pressure sensor configured to measure the strength of a force caused by a touch.

[0057] The audio module 170 may convert sound into an electrical signal, or vice versa. According to an embodiment, the audio module 170 may obtain sound via the input module 150, or output sound via the sound output module 155 or an earphone of an external electronic device (e.g., electronic device 102) directly (e.g., wired) or wirelessly connected to the electronic device 101.

[0058] The sensor module 176 may detect an operating state (e.g., power or temperature) of the electronic device 101 or an environmental state (e.g., a state of a user) outside the electronic device 101, and then generate an electrical signal or data value corresponding to the detected state. According to an embodiment, the sensor module 176 may include, for example, a gesture sensor, a gyro sensor, an atmospheric pressure sensor, a magnetic sensor, an acceleration sensor, a grip sensor, a proximity sensor, a color sensor, an infrared (IR) sensor, a biometric sensor, a temperature sensor, a humidity sensor, or an illumination sensor.

[0059] The interface 177 may support one or more specific protocols to be used to connect the electronic device 101 directly (e.g., wired) or wirelessly to an external electronic device (e.g., the electronic device 102). According to an embodiment, the interface 177 may include, for example, a high-definition multimedia interface (HDMI), a universal serial bus (USB) interface, a secure digital (SD) card interface, or an audio interface.

[0060] The connection end 178 may include a connector, wherein the electronic device 101 can be physically connected to an external electronic device (e.g., the electronic device 102) via the connector. According to an embodiment, the connection end 178 may include, for example, an HDMI connector, a USB connector, an SD card connector, or an audio connector (e.g., a headphone connector).

[0061] The haptic module 179 may convert the electrical signal into mechanical stimulation (eg, vibration or motion) or electrical stimulation that can be recognized by the user via his sense of touch or kinesthetic sense. According to an embodiment, the haptic module 179 may include, for example, a motor, a piezoelectric element, or an electrical stimulator.

[0062] The camera module 180 may capture still images or moving images. According to an embodiment, the camera module 180 may include one or more lenses, an image sensor, an image signal processor, or a flash.

[0063] The power management module 188 may manage power supply to the electronic device 101. According to one embodiment, the power management module 188 may be implemented as, for example, at least a portion of a power management integrated circuit (PMIC).

[0064] The battery 189 may power at least one component of the electronic device 101. According to an embodiment, the battery 189 may include, for example, a non-rechargeable primary battery, a rechargeable secondary battery, or a fuel cell.

[0065] The communication module 190 may support establishing a direct (e.g., wired) communication channel or a wireless communication channel between the electronic device 101 and an external electronic device (e.g., electronic device 102, electronic device 104, or server 108), and perform communication via the established communication channel. The communication module 190 may include one or more communication processors capable of operating independently from the processor 120 (e.g., an application processor (AP)) and supporting direct (e.g., wired) communication or wireless communication. According to an embodiment, the communication module 190 may include a wireless communication module 192 (e.g., a cellular communication module, a short-range wireless communication module, or a global navigation satellite system (GNSS) communication module) or a wired communication module 194 (e.g., a local area network (LAN) communication module or a power line communication (PLC) module). A corresponding one of these communication modules may communicate via a first network 198 (e.g., a short-range communication network such as Bluetooth TM The wireless communication module 192 may communicate with the external electronic device 104 through a wireless communication network 194 (e.g., a wireless fidelity (Wi-Fi) direct connection, or an infrared data association (IrDA)) or a second network 199 (e.g., a long-distance 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 may be implemented as a single component (e.g., a single chip), or may be implemented as multiple components separated from each other (e.g., multiple chips). The wireless communication module 192 may use user information (e.g., an international mobile subscriber identity (IMSI)) stored in the user identification module 196 to identify or authenticate the electronic device 101 in a communication network (such as the first network 198 or the second network 199).

[0066] The wireless communication module 192 can support 5G networks after 4G networks and next-generation communication technologies (e.g., new radio (NR) access technology). NR access technology can support enhanced mobile broadband (eMBB), massive machine type communication (mMTC), or ultra-reliable low-latency communication (URLLC). The wireless communication module 192 can support high-frequency bands (e.g., millimeter wave bands) to achieve, for example, high data transmission rates. The wireless communication module 192 can support various technologies for ensuring performance on high-frequency bands, such as, for example, beamforming, massive multiple-input multiple-output (massive MIMO), full-dimensional MIMO (FD-MIMO), array antennas, analog beamforming, or massive antennas. The wireless communication module 192 can support various requirements specified in the electronic device 101, an external electronic device (e.g., electronic device 104), or a network system (e.g., a second network 199). According to an embodiment, the wireless communication module 192 may support a peak data rate for implementing eMBB (e.g., 20 Gbps or greater), loss coverage for implementing mMTC (e.g., 164 dB or less), or U-plane delay for implementing URLLC (e.g., 0.5 ms or less for each of the downlink (DL) and uplink (UL), or 1 ms or less round trip).

[0067] The antenna module 197 may transmit a signal or power to the outside of the electronic device 101 (e.g., an external electronic device) or receive a signal or power from the outside of the electronic device 101 (e.g., an external electronic device). According to an embodiment, the antenna module 197 may include one antenna including a radiator, and the radiator is formed of a conductor or a conductive pattern formed on a substrate (e.g., a printed circuit board (PCB)). According to an embodiment, the antenna module 197 may include a plurality of antennas (e.g., an array antenna). In this case, at least one antenna suitable for a communication scheme used in a communication network (such as the first network 198 or the second network 199) may be selected from the plurality of antennas by, for example, the communication module 190. A signal or power may then be transmitted or received between the communication module 190 and the external electronic device via the selected at least one antenna. According to an embodiment, other components (e.g., a radio frequency integrated circuit (RFIC)) other than the radiator may be additionally formed as part of the antenna module 197.

[0068] According to various embodiments, the antenna module 197 may 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 a plurality of antennas (e.g., array antennas), wherein the RFIC is disposed on a first surface (e.g., bottom surface) of the printed circuit board, or adjacent to the first surface and capable of supporting a specified high frequency band (e.g., millimeter wave band), and the plurality of antennas are disposed on a second surface (e.g., top surface or side surface) of the printed circuit board, or adjacent to the second surface and capable of transmitting or receiving signals of the specified high frequency band.

[0069] At least some of the above components may be connected to each other via an inter-peripheral communication scheme (e.g., a bus, a general purpose input output (GPIO), a serial peripheral interface (SPI), or a mobile industry processor interface (MIPI)) and communicatively transmit signals (e.g., commands or data) therebetween.

[0070] According to an embodiment, a command or data may be sent or received between the electronic device 101 and the external electronic device 104 via the server 108 connected to the second network 199. Each of the external electronic device 102 or the electronic device 104 may be a device of the same type as the electronic device 101, or a device of a different type from the electronic device 101. According to an embodiment, all or some operations to be executed in the electronic device 101 may be executed in one or more of the external electronic device 102, the external electronic device 104, or the external electronic device 108. For example, if the electronic device 101 should automatically execute a function or service or should execute a function or service in response to a request from a user or another device, the electronic device 101 may request the one or more external electronic devices to execute at least part of the function or service instead of executing the function or service, or the electronic device 101 may request the one or more external electronic devices to execute at least part of the function or service in addition to executing the function or service. The one or more external electronic devices receiving the request may execute at least part of the function or service requested, or execute another function or another service related to the request, and transmit the result of the execution to the electronic device 101. The electronic device 101 may provide the result as at least a partial reply to the request in the case of further processing the result or in the case of not further processing the result. To this end, cloud computing technology, distributed computing technology, mobile edge computing (MEC) technology or client-server computing technology, for example, may be used. The electronic device 101 may use, for example, distributed computing or mobile edge computing to provide ultra-low latency services. In another embodiment, the external electronic device 104 may include an Internet of Things (IoT) device. The server 108 may be an intelligent server using machine learning and / or neural networks. According to an embodiment, the external electronic device 104 or the server 108 may be included in the second network 199. The electronic device 101 may be applied to intelligent services (e.g., smart homes, smart cities, smart cars or health care) based on 5G communication technology or IoT-related technologies.

[0071] Figure 2 2 is a block diagram 200 illustrating a camera module 280 according to various embodiments. Figure 2 The camera module 280 may include a lens assembly 210, a flash 220, an image sensor 230, an image stabilizer 240, a memory 250 (eg, a buffer memory (eg, Figure 1130)) or an image signal processor 260. The lens assembly 210 may collect light emitted or reflected from an object whose image is to be captured. The lens assembly 210 may include one or more lenses. According to an embodiment, the camera module 280 may include a plurality of lens assemblies 210. In this case, the camera module 280 may form, for example, a dual camera, a 360-degree camera, or a spherical camera. Some of the plurality of lens assemblies 210 may have the same lens properties (e.g., viewing angle, focal length, autofocus, f-number, or optical zoom), or at least one lens assembly may have one or more lens properties that are different from the lens properties of another lens assembly. The lens assembly 210 may include, for example, a wide-angle lens or a telephoto lens.

[0072] The flash 220 may emit light, wherein the emitted light is used to enhance light reflected from an object. According to an embodiment, the flash 220 may include one or more light emitting diodes (LEDs) (e.g., red, green, blue (RGB) LEDs, white LEDs, infrared (IR) LEDs, or ultraviolet (UV) LEDs) or xenon lamps. The image sensor 230 may acquire an image corresponding to an object by converting light emitted or reflected from an object and transmitted through the lens assembly 210 into an electrical signal. According to an embodiment, the image sensor 230 may include one image sensor selected from a plurality of image sensors having different properties (e.g., an RGB sensor, a black and white (BW) sensor, an IR sensor, or a UV sensor), a plurality of image sensors having the same properties, or a plurality of image sensors having different properties. Each image sensor included in the image sensor 230 may be implemented using, for example, a charge coupled device (CCD) sensor or a complementary metal oxide semiconductor (CMOS) sensor.

[0073] The image stabilizer 240 may move the image sensor 230 or at least one lens included in the lens assembly 210 in a specific direction, or control an operational property of the image sensor 230 (e.g., adjust the readout timing) in response to the movement of the camera module 280 or the electronic device 201 including the camera module 180. In this way, at least a portion of the negative effects (e.g., image blur) generated due to the movement of the image being captured is allowed to be compensated. According to an embodiment, the image stabilizer 240 may sense such movement of the camera module 280 or the electronic device 201 using a gyroscope sensor (not shown) or an acceleration sensor (not shown) arranged inside or outside the camera module 280. 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 image acquired via the image sensor 230 for subsequent image processing tasks. For example, if multiple images are captured quickly or image capture is delayed due to shutter lag, the acquired original image (e.g., Bayer pattern image, high-resolution image) may be stored in the memory 250, and its corresponding copy image (e.g., low-resolution image) may be previewed via the display module 160. Then, if a specified condition is satisfied (e.g., by a user's input or a system command), at least a portion of the original image stored in the memory 250 may be acquired and processed by, for example, the image signal processor 260. According to an embodiment, the memory 250 may be configured as 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 130.

[0074] The image signal processor 260 may perform one or more image processing on an image acquired via the image sensor 230 or an image stored in the memory 250. The one or more image processing may include, for example, depth map generation, three-dimensional (3D) modeling, panorama generation, feature point extraction, image synthesis, or image compensation (e.g., noise reduction, resolution adjustment, brightness adjustment, blurring, sharpening, or softening). Additionally or alternatively, the image signal processor 260 may perform control (e.g., exposure time control or readout timing control) on at least one of the components included in the camera module 280 (e.g., image sensor 230). The image processed by the image signal processor 260 may be stored back to the memory 250 for further processing, or the image may be provided to an external component outside the camera module 280 (e.g., 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 at least a part of the processor 120, or the image signal processor 260 may be configured as a separate processor that operates independently of the processor 120. If the image signal processor 260 is configured as a processor separate from the processor 120, the processor 120 may receive the image signal from the display module (eg, Figure 1 160) may display at least one image processed by the image signal processor 260 as it is, or may display the at least one image after being further processed.

[0075] According to an embodiment, the electronic device 101 may include a plurality of camera modules 280 having different properties or functions. In this case, at least one camera module 280 of the plurality of camera modules 280 may form, for example, a wide-angle camera, and at least another camera module 180 of the plurality of camera modules 180 may form a telephoto camera. Similarly, at least one camera module 280 of the plurality of camera modules 280 may form, for example, a front camera, and at least another camera module 180 of the plurality of camera modules 180 may form a rear camera.

[0076] According to various embodiments, a representative example of the electronic device 101 may include an optical device (eg, a camera module), and the following description may be based on the assumption that a lens assembly is equipped in the optical device according to the embodiment.

[0077] Although limitations or restrictions on certain numbers may be proposed herein, it should be noted that the various embodiments of the present disclosure are not limited by these numbers unless these numbers are shown in the claims.

[0078] Figure 3a is a view showing a configuration of a lens assembly according to an embodiment. Figure 3b It is shown Figure 3aA view of the sample configuration. Figure 3c It is shown Figure 3a According to an embodiment, Figure 3b and Figure 3c A folded optical system is shown, which includes a reflective member M that refracts or reflects light incident on a lens assembly at least twice. Figure 4a It is shown Figure 3a A graph of the spherical aberration of a lens assembly. Figure 4b It is shown Figure 3a A graph of the astigmatism of a lens assembly. Figure 4c It is shown Figure 3a A graph of the distortion of a lens assembly.

[0079] Reference Figure 3a According to one of the various embodiments of the present disclosure, a lens assembly may include a plurality of lenses and an image sensor.

[0080] According to various embodiments, the image sensor IS may be equipped in an electronic device. The lens assembly 300 including a plurality of lenses may be mounted on an optical device equipped with an image sensor and / or an electronic device configured with an optical system (eg, Figure 1 The optical device may be, for example, a camera. The following description may assume that the lens assembly 300 is installed in the optical device. The optical device may be understood as further including a housing that protects the internal components and forms an exterior together with the optical system.

[0081] According to various embodiments, the image sensor IS may be a sensor mounted on a circuit board and aligned with an optical axis and responsive to light. The image sensor IS may include a sensor such as a complementary metal oxide semiconductor (CMOS) or a charge coupled device (CCD) sensor. However, the image sensor IS is not limited thereto, but may include various elements that convert light (e.g., an object image) into an electronic image signal. The image sensor IS may detect brightness, contrast information, or color information about an object from light that has been transmitted through a plurality of lenses, thereby obtaining an image of the object.

[0082] According to various embodiments of the present disclosure, at least one of the multiple lenses included in the lens assembly 300 may include a lens formed of a synthetic resin (e.g., plastic). Since the multiple lenses included in the lens assembly 300 are manufactured as lenses formed of a synthetic resin (e.g., plastic) having a predetermined refractive index, the size or shape of the lens assembly can have a high degree of design freedom. Since the multiple lenses included in the lens assembly are manufactured as lenses formed of a synthetic resin (e.g., plastic) having a predetermined refractive index, the weight and manufacturing cost of the lens assembly can be reduced compared to, for example, when the lens assembly is formed to include a glass material. In addition, when the first lens from the object side includes a glass material, the second lens and subsequent lenses from the object side are restricted in shape by the first lens. The multiple lenses included in the lens assembly 300 are formed of a synthetic resin material, so that a high degree of freedom in lens design can be ensured. In addition, since the multiple lenses included in the lens assembly 300 are formed of a synthetic resin material, for an electronic device (e.g., Figure 1 Weight reduction and miniaturization of the electronic device 101) may be advantageous.

[0083] According to various embodiments, the lens assembly 300 may be disposed on an optical axis OI that passes through the center of a plurality of lenses from the object (or external object) side to the image side. When describing the configuration of each lens below, the "object side" may refer to the direction in which the object O is located, and the "image side" may refer to the direction in which the imaging plane img that forms the image I is located. The "object-facing surface" of the lens may refer to the surface facing the object on the optical axis, which may refer to the left (or front) surface of the lens as viewed from above the accompanying drawings, and the "image-facing surface" of the lens may refer to the surface facing the imaging plane img on the optical axis OI, which may refer to the right (or rear) surface of the lens as viewed from above the accompanying drawings of the present disclosure. The imaging plane img may be, for example, a portion where an image capture element or an image sensor is disposed and an image is formed.

[0084] According to an embodiment, when describing a plurality of lenses, a portion of each lens close to the optical axis OI may be referred to as a main portion, and a portion away from the optical axis (or around the edge of the lens) may be referred to as an edge portion. The main portion may be a portion of a lens (e.g., a first lens) that intersects the optical axis, and may allow the principal ray of light incident on the lens assembly 300 to pass therethrough. The edge portion may be, for example, a portion of a lens (e.g., a first lens) that is spaced a predetermined distance from the optical axis. The edge portion may include an end portion of the lens that is located at the farthest position from the optical axis of the lens. In addition, according to various embodiments of the present disclosure, light passing through the main portion or a portion close to the main portion may be referred to as a short-axis beam, and light passing through the edge portion may be referred to as a long-axis beam.

[0085] According to an embodiment, unless otherwise specified, the radius of curvature, thickness, total length (TTL) from the imaging plane, and focal length of the lens as described herein may be in millimeters. The thickness of the lens, the spacing between the lenses, or the TTL may be the distance measured from the center of the optical axis of the lens. When describing the shape of the lens, "one surface of the lens is convex" may mean that the optical axis portion of the surface is convex, and "one surface of the lens is concave" may mean that the optical axis portion of the surface is concave. Therefore, although one surface of the lens (e.g., the optical axis portion of the surface) is described as convex, the edge portion of the lens (e.g., the portion separated from the optical axis portion of the surface by a predetermined distance) may be concave. Similarly, although one surface of the lens (e.g., the optical axis portion of the surface) is described as concave, the edge portion of the lens (e.g., the portion separated from the optical axis portion of the surface by a predetermined distance) may be convex. As used herein, the term "inflection point" may refer to a point where the radius of curvature changes in a portion that does not intersect the optical axis.

[0086] According to various embodiments of the present disclosure, the lens assembly 300 may include at least four or more lenses. Figure 3a The lens assembly 300 may include four lenses as the optical axis direction (for example, from Figure 3a For example, the lens assembly 300 may include a first lens L1, a second lens L2, a third lens L3, and a fourth lens L4 arranged sequentially from the object side O to the image side I. However, it should be noted that the number of lenses included in the lens assembly is not limited to Figure 3a The following is an embodiment of Figure 5 , Figure 7 , Fig. 9 and Fig.11 The embodiment disclosed in the embodiment includes five lenses. The lens assembly 300 may include a reflective member M that can reflect light passing through the lens closest to the image (e.g., Figure 3a , Figure 3b , Figure 3c and Fig.13 The fourth lens L4, or Figure 5 , Figure 7 , Fig. 9 and Fig.11 The path of the light of the fifth lens L5) is changed at least twice or more. The lens assembly 300 may use a prism as a reflective member M. Figure 3b and Figure 3c The reflecting member M is described in detail.

[0087] According to various embodiments, the first lens (e.g., the first lens L1) disposed from the object side included in the lens assembly may have a positive (+) refractive power. If light parallel to the optical axis is incident on a lens having a positive refractive power, the light may be focused after passing through the lens. For example, the lens having a positive refractive power may be a lens based on the principle of a convex lens. In contrast, if parallel light is incident on a lens having a negative (-) refractive power, the light may be diverged after passing through the lens. For example, the lens having a negative refractive power may be a lens based on the principle of a concave lens. For example, in the lens assembly of the present disclosure, the lens (e.g., the second lens L2) disposed from the object side may have a negative refractive power.

[0088] According to various embodiments, the first lens from the object side (e.g., first lens L1) among the plurality of lenses may be a "double convex lens" in which both the object-side surface and the image-side surface are convex. Since the first lens from the object side (e.g., first lens L1) is implemented as a double convex lens, light incident on the first lens from the object side may be converged, and light passing through the first lens from the object side (e.g., first lens L1) may be diverged. Therefore, control of aberrations and sensitivity in other lenses may be improved compared to the first lens from the object side.

[0089] According to various embodiments, the first lens from the object side among the plurality of lenses (e.g., the first lens L1) may form at least one aspherical surface of the first lens (e.g., the first lens L1). According to various embodiments, any one of the object-side surface L1S2 and the image-side surface L1S3 of the first lens from the object side (e.g., the first lens L1) may be formed as an aspherical surface. For example, spherical aberration that may occur when light passes through the lens assembly may be controlled by implementing at least one surface of the first lens from the object side (e.g., the first lens L1) as an aspherical surface. According to various embodiments, at least one surface of other lenses from the object side other than the first lens (e.g., the first lens L1) may be formed as an aspherical surface. Therefore, coma may be prevented from being generated in the edge portion of the image sensor IS to facilitate astigmatism control, and the occurrence of field curvature from the main portion to the edge portion of the imaging plane img of the image sensor may be reduced. According to an embodiment, as will be described below, as Fig.13 As shown in , the lens assembly 300 of the present disclosure may apply the first lens (eg, first lens L1 ) from the object side among a plurality of lenses as a lens having a glass material according to various embodiments.

[0090] According to an embodiment, the lens assembly 300 may include at least one aperture "sto". The aperture adjusts the size of the aperture formed in the aperture, and the amount of light reaching the imaging plane "img" of the image sensor may be adjusted by adjusting the size of the aperture. According to an embodiment, the position of the aperture may be set on the object surface of the first lens (e.g., the first lens L1) from the object side, but is not necessarily limited thereto.

[0091] According to various embodiments, the lens assembly 300 may further include a filter F between the last lens from the object side and the image sensor IS. The filter F may block light (e.g., infrared (IR) light) from being detected by the image sensor or the film of the optical device. The filter F may include, for example, at least one of a low-pass filter or a cover glass. For example, the filter F may allow the color of the image detected and captured by the image sensor IS to be closer to the actual color that humans see and feel for the object. The filter F may transmit visible light, but reflect IR light so that the IR light reaches the imaging plane "img" of the image sensor IS.

[0092] In addition, the electronic device of the present disclosure may further include an optical member that refracts or reflects light that passes through the lens assembly 300 and is incident on the image sensor IS. In other words, the electronic device of the present disclosure relates to a folded optical system. According to an embodiment, the optical member that refracts or reflects light may be referred to as a reflective member "M". According to an embodiment, the reflective member M may be disposed between the lens assembly and the image sensor. According to an embodiment, the path of the main light passing through the reflective member M may be parallel to the main light incident on the lens assembly. The reflective member may include a plane mirror and / or a prism. Here, the plane mirror may be a plane mirror that reflects or refracts light. According to an embodiment, a reflective member of a plane mirror and a prism may be provided as the reflective member M. However, not limited thereto, according to an embodiment, the reflective member M may include at least one of a plane mirror and a prism. According to another embodiment, the reflective member M may have a configuration including a plurality of plane mirrors and / or prisms. Therefore, the reflective member M may change the path along which the light travels at least twice. According to various embodiments, the focal length in a reduced-size electronic device may be increased by including a reflective member M.

[0093] Reference Figure 3b , the electronic device of the present disclosure may include a reflective member having at least two reflective surfaces as the reflective member M. For example, the reflective member M may include a first reflective surface M1 and a second reflective surface M2. Figure 3b The reflective member M is shown to include two reflective surfaces, but is not limited thereto, and the reflective member M may further include an additional reflective surface not shown. According to an embodiment, the at least two reflective surfaces may be reflective surfaces provided in one reflective member M. For example, the at least two reflective surfaces may correspond to Figure 3bThe two opposing surfaces in one reflective member M having a parallelogram cross section are shown. However, it should be noted that the present disclosure is not necessarily limited thereto. The at least two reflective surfaces may be respectively provided on two or more reflective members M, rather than on one reflective member.

[0094] exist Figure 3c In the illustrated embodiment, it is shown that the reflective member M includes four reflective surfaces M1, M2, M3 and M4. For example, the reflective member M may include a first reflective surface M1, a second reflective surface M2, a third reflective surface M3 and a fourth reflective surface M4. According to an embodiment, the reflective member M may include a parallelogram structure in which the first reflective surface M1 and the second reflective surface M2 are parallel to each other, and the third reflective surface M3 and the fourth reflective surface M4 are parallel to each other. According to an embodiment, Figure 3b and Figure 3c The reflective member M may be formed of an integral reflective member M, for example, a prism and / or a plane mirror structure in a single (or integrated) form, wherein the entire reflective member M is formed using a seamless joint. However, the present disclosure is not necessarily limited thereto, and the reflective member M may be formed of a combination of a plurality of sub-reflective members. Figure 3b and Figure 3c In the embodiment of , a plurality of sub-reflection members may be connected to each other continuously to form a reflective member M. For example, in Figure 3b In the embodiment of the present invention, the reflective member M may include a first sub-reflective member having a first reflective surface M1 and a second sub-reflective member having a second reflective surface M2. Figure 3c In the embodiment, the reflective member M may include a first sub-reflective member having a first reflective surface M1, a second sub-reflective member having a second reflective surface M2, and a third sub-reflective member having a third reflective surface M3 and a fourth reflective surface M4.

[0095] exist Figure 3b In the embodiment of the present invention, the angle between the first reflective surface M1 and the normal line perpendicular to the optical axis OI may be formed to be approximately 45 degrees, and Figure 3c In the embodiment of the present invention, the angle between the first reflective surface M1 and the normal line perpendicular to the optical axis OI may be formed to be approximately 30 degrees. Figure 3b In the embodiment of the present invention, the light is designed to be refracted and / or reflected at least twice when passing through the reflective member M, but in Figure 3c In the embodiment of FIG. 5 , light may be designed to be refracted and / or reflected at least four times when passing through the reflective member M. Figure 3c In an embodiment, the distance the light moves may be greater than Figure 3b Therefore, in Figure 3c In an embodiment, the back focal length (BFL) may be greater than Figure 3b The embodiment is longer.

[0096] in addition, Figure 3b and Figure 3c It is shown that the direction of light incident on the lens assembly 300 may be the same as the direction of light emitted to the image sensor IS, but optionally, the scope of the present disclosure may also include a case where the direction of light incident on the lens assembly 300 is opposite to the direction of light emitted to the image sensor IS. For example, the reflective member M may be formed in an isosceles trapezoid instead of a parallelogram, and the direction of light incident on the lens assembly 300 and the direction of light emitted to the image sensor IS may be opposite to each other.

[0097] According to various embodiments, when a high-performance, large-sized image sensor is included, the captured image quality of the electronic device can be enhanced. For example, the image height IMG HT of the image sensor of the present disclosure may have a size of 4.0 mm or more. Here, the image height of the image sensor may mean half of the diagonal length of the image sensor. However, as the size of the image sensor increases, the lens assembly corresponding thereto may be difficult to equip in a reduced-size electronic device. For example, the thickness of the electronic device may increase due to the length or width of the image sensor. Therefore, according to an embodiment, since the lens assembly includes at least one reflective member, the design freedom regarding the arrangement direction of the lens or the arrangement direction of the image sensor can be ensured. Therefore, even when the image sensor is enlarged, it can be easily installed in a reduced-size and / or thinned electronic device.

[0098] According to various embodiments of the present disclosure, by satisfying the following Conditional Equation 1 and Conditional Equation 2, the lens assembly can be included in a small electronic device as a bright telephoto lens.

[0099] [Conditional equation 1]

[0100] 0.6 <BFL / EFL<1.1

[0101] [Conditional equation 2]

[0102] 15 <FOV<35

[0103] In conditional equation 1, BFL (back focal length) is the distance from the image surface of the lens closest to the imaging plane "img" (e.g., the fourth lens L4) to the image sensor IS, and EFL (effective focal length) is the total focal length of the lens assembly 300. In conditional equation 2, FOV is the field of view of the entire optical system including the lens assembly 300. In the present disclosure, a lens assembly including four lenses (a first lens L1, a second lens L2, a third lens L3, and a fourth lens L4) is provided. The focal length can be increased by forming a long BFL, and a plurality of reflective components can be included. BFL can represent the length on the optical axis OI. BFL can represent the distance from the image surface of the lens closest to the imaging plane img (e.g., the fourth lens L4) to the image sensor IS for light passing through the center of the lens. For example, in Figure 3b In an embodiment of the present invention, BFL may be the sum of a distance I1 from the image surface S9 of the lens closest to the imaging plane img (e.g., the fourth lens L4) to the first reflection surface M1 of the reflection member M, a distance I2 from the first reflection surface M1 to the second reflection surface M2, and a distance I3 from the second reflection surface M2 to the imaging plane img of the image sensor IS. If BFL / EFL in conditional equation 1 is lower than a lower limit, it may be difficult to ensure a distance sufficient to place the reflection member M. For example, if the distance from the image surface of the lens closest to the imaging plane img to the image sensor is short, it may be difficult to place the reflection member to change the light travel path at least twice. As a result, it may be difficult to reduce the size of the module. If BFL / EFL in conditional equation 1 is higher than an upper limit, the sensitivity of spherical aberration may increase, deteriorating the image quality. The above conditional equation 2 may represent the field of view range of the telephoto lens. The viewing angle range may be expressed as a conversion focal length corresponding thereto, and the viewing angle range of Conditional Equation 2 may be based on a value of about 85 mm to 150 mm corresponding to the conversion focal length of a 35 mm film.

[0104] Furthermore, the lens assembly may satisfy Conditional Equation 3 and Conditional Equation 4.

[0105] [Conditional equation 3]

[0106] 0.8 <OTTL / EFL<1.4

[0107] [Conditional equation 4]

[0108] 2.5 <EFL / EFL1<3.4

[0109] Here, in Conditional Equation 3, OTTL (optical total length to the imaging plane) represents the optical total length, and may be the distance from the vertex of the object-side surface of the first lens (e.g., the first lens L1) from the object side to the image sensor IS, EFL may be the total focal length of the lens assembly, and EFL1 may be the focal length of the first lens (e.g., the first lens L1) from the object side. If OTTL / EFL in Conditional Equation 3 is lower than a lower limit, the sensitivity of the lens included in the lens assembly may increase, making manufacturing difficult, and if OTTL / EFL in Conditional Equation 3 is higher than an upper limit, the module may be difficult to reduce in size. If EFL / EFL1 in Conditional Equation 4 is lower than a lower limit, the overall size of the lens assembly 300 may be increased to make it difficult to reduce the module, and if EFL / EFL1 in Conditional Equation 4 is higher than an upper limit, the sensitivity of spherical aberration increases, making it difficult to manufacture the electronic device.

[0110] Furthermore, the lens assembly may satisfy Conditional Equation 5 and Conditional Equation 6.

[0111] [Conditional Equation 5]

[0112] 2.5 <EFL / L1LL<4.2

[0113] [Conditional expression 6]

[0114] -4.5 <L1S3 / L1S2<-0.6

[0115] Here, in Conditional Equation 5, EFL may represent the total focal length of the lens assembly 300, and L1LL is the distance from the vertex of the object-side surface of the first lens (eg, first lens L1) from the object side to the lens closest to the image side (eg, Figure 3a and Figure 3b The fourth lens L4 in the embodiment of Figure 5 , Figure 7 and Fig. 9In the conditional equation 6, L1S3 may indicate the curvature of the image-side surface S3 of the first lens (e.g., the first lens L1) from the object side, and L1S2 may indicate the curvature of the object-side surface S2 of the first lens (e.g., the first lens L1) from the object side. If EFL / L1LL in the conditional equation 5 is lower than a lower limit, the overall size of the lens assembly may increase, making it difficult to reduce the size of the electronic device, and if EFL / L1LL in the conditional equation 5 is higher than an upper limit, the sensitivity of field curvature may increase, making it difficult to manufacture the electronic device. If L1S3 / L1S2 in the conditional equation 6 is lower than a lower limit, in order to control spherical aberration, the shape sensitivity of other lenses except the first lens (e.g., the first lens L1) from the object side may increase, making manufacturing difficult, and if L1S3 / L1S2 in the conditional equation 6 is higher than an upper limit, the field curvature aberration may increase, thereby deteriorating the image quality.

[0116] In addition, the lens assembly can satisfy the condition Equation 7.

[0117] [Conditional expression 7]

[0118] 2.1 <BFL / L1LL<3.8

[0119] In Conditional Equation 1, BFL (back focal length) is the distance from the image-side surface of the lens closest to the imaging plane "img" (e.g., the fourth lens L4) to the image sensor IS, and L1LL is the distance from the vertex of the object-side surface of the first lens from the object side (e.g., the first lens L1) to the lens closest to the image side (e.g., Figure 3a and Figure 3b The fourth lens L4 in the embodiment of Figure 5 , Figure 7 and Fig. 9 If BFL / L1LL in Conditional Equation 7 is lower than the lower limit, the angle of view (FOV) increases, which is not conducive to constructing a telephoto lens, and may increase the shape sensitivity of the lens. In addition, if BFL / L1LL in Conditional Equation 7 is higher than the upper limit, the sensitivity of field curvature may increase, the angle of view (FOV) may decrease, which is conducive to telephoto, but may increase the overall size of the camera module, which may not be suitable for small electronic devices.

[0120] Table 1 shows Figure 3aVarious lens data of a lens assembly, where "obj" may represent an object, radius may represent the radius of curvature of a lens, thickness may represent the thickness of a lens or an air gap, EFL represents the focal length of all lenses, "nd" represents the refractive index of a medium (e.g., a lens), and "vd" represents the Abbe number of a lens. The radius of curvature may indicate the value or degree of curvature at each point on a curve or curved surface. Here, "S1" may be a position considered in the design of the lens assembly, rather than an actual lens surface. For example, "S1" may indicate a point on a lens barrel. The lens barrel may contact the lens closest to the object side of the lens assembly (e.g., the first lens L1). According to an embodiment, the stop "sto" may be set between the second lens from the object side of the lens assembly and the third lens from the object side. According to an embodiment, the position of the stop "sto" may be defined as the same as the position of the object side surface S6 of the third lens of the lens assembly. "S2 to S13" may refer to the object side and image side surfaces of a plurality of lenses and filters F. For thickness, the thickness marked on the object-side surface (e.g., S2) of a certain lens (e.g., first lens L1) may indicate the thickness of the lens, and the thickness value marked on the image-side surface of a certain lens may be described as the air gap from the lens to the lens located behind the lens along the optical axis direction. For example, the thickness value marked on the image-side surface S3 of the first lens L1 may be data for indicating the air gap to the object-side surface S4 of the second lens L2. "S12" and "S13" may indicate the object-side (O) surface and the image-side (I) surface of the filter (IR cutoff filter) F.

[0121] The lens assembly 300 included in Table 1 below may relate to a telephoto lens having a field of view (FOV) of 25.9 degrees. In addition, when the total focal length (EFL) is 18.183 mm, the F number (Fno) is about 2.798, and the optical total length (OTTL) from the imaging plane is 24.799 mm, the lens assembly 300 included in Table 1 may satisfy the above conditions (and / or at least one of the above conditions). In addition, the lens assembly corresponding to Table 1 below may employ a prism as a reflective member. In the following table, portions marked with the symbol "*" (such as "S2*, S3*, S4*, S5*, S7*, S8*, and S9*") may represent surfaces of lenses to which aspherical surfaces are applied.

[0122] [Table 1]

[0123]

[0124]

[0125] The following Table 2 shows aspherical coefficients of a plurality of lenses, and the aspherical coefficients can be calculated by the following Conditional Equation 8.

[0126] [Conditional Equation 8]

[0127]

[0128] Here, "z" may represent the distance vector height from the lens vertex to the optical axis OI, "c" represents the inverse of the radius of curvature of the lens at the lens vertex, "y" represents the distance in a direction perpendicular to the optical axis, "K" represents a conic constant, and "A", "B", "C", "D", "E", "F", "G", "H", "I", "J", "K", "L", "M" and "N" represent aspheric coefficients.

[0129] [Table 2]

[0130]

[0131]

[0132] Figure 4a is an example of one embodiment (for example, Figure 3a Graph of spherical aberration of a lens assembly of an embodiment of the present invention. Spherical aberration may refer to a phenomenon in which light beams passing through different parts of a lens (e.g., a main part and an edge part) are focused to different positions. Figure 4a , the horizontal axis refers to the degree of longitudinal spherical aberration, and the vertical axis refers to the normalized result of the distance from the optical axis center. Figure 2 A change in longitudinal spherical aberration according to the wavelength of light may be shown. The longitudinal spherical aberration may be shown for each of light beams having wavelengths of about 656.3000 nanometers (nm), about 587.6000 nm, about 546.1000 nm, about 486.1000 nm, and about 435.8000 nm. Figure 4a , in the visible light range, the longitudinal spherical aberration of the lens assembly according to the embodiment can be limited to within the range from about +0.100 to -0.100, so that stable optical characteristics are shown. Figure 4b 3 is a graph showing astigmatism of a lens assembly according to one embodiment (e.g., the embodiment of FIG. 3 ) of various embodiments of the present disclosure. Astigmatism may refer to the deviation between the focal points of light beams passing through in the vertical and horizontal directions when the tangential or meridional plane of the lens has a radius different from the radius of the sagittal plane of the lens.

[0133] Here, the astigmatism of the lens assembly is a result obtained at a wavelength of about 546.1000 nm, where the dotted line Y may represent the astigmatism in the tangential plane direction (e.g., tangential field curvature), and the solid line X may represent the astigmatism in the sagittal plane direction (e.g., sagittal field curvature). It can be recognized from the graph that the astigmatism can be limited to a range of about +0.100 to -0.100, so that stable optical characteristics can be shown according to various embodiments of the present disclosure.

[0134] Figure 4c 3 is a graph showing the distortion of a lens assembly according to one embodiment (e.g., the embodiment of FIG. 3 ) among various embodiments of the present disclosure. The distortion is generated due to the change in optical magnification according to the distance from the optical axis. Compared with the image formed on the theoretical imaging plane img, the image formed on the actual imaging plane img may be shown to be larger or smaller due to the distortion.

[0135] The distortion of the lens assembly is the result obtained at a wavelength of about 546.1000nm. The image captured by the lens assembly may cause distortion at a point (e.g., an edge portion) that deviates from the optical axis. However, the distortion is a degree that may generally occur in an optical device using a lens, and according to one of the various embodiments of the present disclosure (e.g., Figure 3a The lens assembly of the embodiment) has a distortion rate of less than about 1.00% and can provide good optical characteristics.

[0136] Figure 5 is a view showing a configuration of a lens assembly according to an embodiment. Figure 6a It is shown Figure 5 A graph of the spherical aberration of a lens assembly. Figure 6b It is shown Figure 5 A graph of the astigmatism of a lens assembly. Figure 6c It is shown Figure 5 A graph of the distortion of a lens assembly.

[0137] according to Figure 3a The description of the lens assembly 300 of the aforementioned embodiment may be applicable to the lens assemblies 400, 500, and 600 according to other various embodiments described below. Some of the plurality of lens assemblies 300, 400, 500, and 600 may have the same lens properties (e.g., viewing angle, focal length, autofocus, f-number, or optical zoom), or at least one lens assembly may have one or more lens properties different from another lens assembly.

[0138] When describing the following embodiments of the present disclosure, components that can be easily understood from the above embodiments are given the same or similar reference numerals, or are not given reference numerals. As long as it overlaps with the above description, its detailed description is not presented below.

[0139] Reference Figures 5 to 6c , according to various embodiments of the present disclosure Figures 3a to 4c The lens assembly 400 of another embodiment different from the embodiment of the present invention may include multiple lenses, image sensors and / or filters. Figure 5 and Figure 6c The lens assembly of the embodiment shown in FIG. 400 may include 5 lenses. 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. The lens assembly 400 uses a plane mirror as a reflective member, and Figure 5 In the embodiment, the reflective member may not be shown. The following Table 3 may show the Figures 5 to 6c Various lens data of the lens assembly of the embodiment. In the following Table 3, the parts marked with the symbol "*" (such as, "S2*, S3*, S4*, S5*, S7*, S9*, S10*, and S11*") may represent the surfaces of the lenses to which the aspherical surfaces are applied. The following Table 4 may respectively show the data for defining the aspherical coefficients of multiple lenses.

[0140] The lens assembly included in Table 3 below may relate to a telephoto lens having a field of view (FOV) of 19.7 degrees. In addition, when the total focal length (EFL) is 23.927 mm, the F number (Fno) is about 3.305, and the optical total length (OTTL) from the imaging plane is 22.554 mm, the lens assembly included in Table 3 may satisfy the above conditions (and / or at least one of the above conditions).

[0141] [Table 3]

[0142]

[0143]

[0144] [Table 4]

[0145]

[0146] Figure 7 is a view showing a configuration of a lens assembly according to an embodiment. Figure 8a It is shown Figure 7 A graph of the spherical aberration of a lens assembly. Figure 8b It is shown Figure 7 A graph of the astigmatism of a lens assembly. Figure 8c It is shown Figure 7 A graph showing the distortion of a lens assembly. Figure 7 to Figure 8c , according to various embodiments of the present disclosure Figures 3a to 4c The lens assembly 500 of another embodiment different from the embodiment of the present invention may include multiple lenses, image sensors and / or filters. Figure 7 to Figure 8c The lens assembly of the embodiment shown in may include 5 lenses. The lens assembly 500 may include a first lens L1, a second lens L2, a third lens L3, a fourth lens L4 and a fifth lens L5. The lens assembly 500 may include a reflective member M capable of changing the path of light passing through the fifth lens L5 at least twice or more. The lens assembly 500 may adopt a prism as the reflective member M. In Table 5 below, the parts marked with the symbol "*" (such as "S2*, S3*, S5*, S7*, S9* and S10*") may represent the surface of the lens to which the aspherical surface is applied. Various lens data about the lens assembly 500 may be shown. Table 6 below may respectively show data for defining the aspherical coefficients of multiple lenses.

[0147] The lens assembly 500 included in Table 5 below may relate to a telephoto lens having a field of view (FOV) of 23.7 degrees. In addition, when the total focal length (EFL) is 19.784 mm, the F number (Fno) is about 3.016, and the optical total length (OTTL) from the imaging plane is 25.076 mm, the lens assembly included in Table 6 may satisfy the above conditions (and / or at least one of the above conditions).

[0148] [Table 5]

[0149]

[0150] [Table 6]

[0151]

[0152]

[0153] Fig. 9 is a view showing a configuration of a lens assembly according to an embodiment. Fig.10a It is shown Fig. 9 A graph of the spherical aberration of a lens assembly. Fig.10b It is shown Fig. 9 A graph of the astigmatism of a lens assembly. Fig.10c It is shown Fig. 9 A graph showing the distortion of a lens assembly. Figures 9 to 10c , according to various embodiments of the present disclosure Figures 3a to 4c The lens assembly 600 of another embodiment different from the embodiment may include a plurality of lenses, an image sensor IS and / or an optical filter F. Here, according to Figures 9 to 10cThe lens assembly of the embodiment shown in FIG. 600 may include 5 lenses. 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. The lens assembly 600 may include a reflective member M capable of changing the path of light passing through the fifth lens L5 at least twice or more. The lens assembly 600 may use a prism as the reflective member M. The following Table 7 may represent the Figures 9 to 10c Various lens data of the lens assembly 600 of the embodiment of the present invention. In the following Table 7, the parts marked with the symbol "*" (such as "S2*, S3*, S5*, S7*, S9*, and S10*") may indicate the surface of the lens to which the aspherical surface is applied. The following Table 8 may respectively show the data for defining the aspherical coefficients of the plurality of lenses.

[0154] The lens assembly 600 included in Table 7 below may relate to a telephoto lens having a field of view (FOV) of 17.1 degrees. In addition, when the total focal length (EFL) is 27.812 mm, the F number (Fno) is about 2.959, and the optical total length (OTTL) from the imaging plane is 35.416 mm, the lens assembly 600 included in Table 8 may satisfy the above conditions (and / or at least one of the above conditions).

[0155] [Table 7]

[0156]

[0157]

[0158] [Table 8]

[0159] surface 2_ASP 3_ASP 5_ASP 7_ASP 9_ASP 10_ASP radius 7.32900E+00 -1.57472E+01 4.99328E+00 1.89177E+01 5.01345E+00 9.95612E+00 K(2 times) -4.68379E-01 -1.00000E+00 3.00348E-01 1.95415E+01 -1.96637E-01 5.12095E+00 A(4 times) 9.97543E-05 4.83871E-04 3.58210E-04 -8.19193E-04 -1.78124E-03 -1.48239E-03 B(6 times) 1.05669E-04 2.02408E-04 -4.94104E-04 8.15498E-04 -4.32899E-04 1.75542E-04 C(8 times) -6.31717E-05 -1.24245E-04 2.76680E-04 -7.80458E-04 7.33338E-04 1.38965E-04 D(10 times) 2.25038E-05 4.57899E-05 -1.08659E-04 5.40379E-04 -6.39768E-04 -1.94103E-04 E(12 times) -5.19212E-06 -1.17381E-05 3.15974E-05 -2.60722E-04 3.41915E-04 9.94148E-05 F(14 times) 8.19162E-07 2.16851E-06 -7.72083E-06 8.93436E-05 -1.22672E-04 -2.82415E-05 G(16 times) -9.10868E-08 -2.93050E-07 1.69444E-06 -2.21049E-05 3.09432E-05 4.62680E-06 H(18 times) 7.24718E-09 2.91155E-08 -3.19464E-07 3.98719E-06 -5.64333E-06 -3.81457E-07 I(20 times) -4.13619E-10 -2.11906E-09 4.71008E-08 -5.24928E-07 7.56654E-07 2.39035E-09 J(22 times) 1.67573E-11 1.11421E-10 -5.04370E-09 4.99238E-08 -7.47868E-08 1.99919E-09 K(24 times) -4.69015E-13 -4.11281E-12 3.71766E-10 -3.34001E-09 5.34748E-09 -7.08698E-11 L(26 times) 8.59101E-15 1.00970E-13 -1.77494E-11 1.49034E-10 -2.62382E-10 -1.04158E-11 M(28 times) -9.22302E-17 -1.47893E-15 4.92589E-13 -3.97808E-12 7.87736E-12 9.33711E-13 N(30 times) 4.37173E-19 9.77186E-18 -6.02386E-15 4.79923E-14 -1.08365E-13 -2.25172E-14

[0160] Fig.11 is a view showing a configuration of a lens assembly according to an embodiment. Fig.12a It is shown Fig.11 A graph of the spherical aberration of a lens assembly. Figure 12b It is shown Fig.11 A graph of the astigmatism of a lens assembly. Fig.12c It is shown Fig.11 A graph showing the distortion of a lens assembly. Figure 11 to Figure 12c , according to various embodiments of the present disclosure Figures 3a to 4c The lens assembly 700 of another embodiment different from the embodiment of the present invention may include a plurality of lenses, an image sensor IS and / or an optical filter F. Here, according to Figure 11 to Figure 12cThe lens assembly of the embodiment shown in may include 5 lenses. Lens assembly 700 may include a first lens L1, a second lens L2, a third lens L3, a fourth lens L4 and a fifth lens L5. In lens assembly 700, the second lens L2 may be different from the above-mentioned embodiment in that the surface facing the object has a convex shape. Lens assembly 700 may include a reflective member M that is capable of changing the path of light passing through the fifth lens L5 at least twice or more. Lens assembly 700 may use a prism as the reflective member M. The following Table 9 may represent the Figure 11 to Figure 12c Various lens data of the lens assembly 700 of the embodiment of the present invention. In the following Table 9, the parts marked with the symbol "*" (such as "S2*, S3*, S5*, S7*, S9*, and S10*") may indicate the surface of the lens to which the aspherical surface is applied. The following Table 10 may respectively show the data for defining the aspherical coefficients of the plurality of lenses.

[0161] The lens assembly 700 included in Table 9 below may relate to a telephoto lens having a field of view (FOV) of 22.4 degrees. In addition, when the total focal length (EFL) is 21.000 mm, the F number (Fno) is about 3.135, and the optical total length (OTTL) from the imaging plane is 25.193 mm, the lens assembly 700 included in Table 9 may satisfy the above conditions (and / or at least one of the above conditions).

[0162] [Table 9]

[0163]

[0164] [Table 10]

[0165]

[0166]

[0167] Fig.13 is a view showing a configuration of a lens assembly according to an embodiment. Fig.14a It is shown Fig.13 A graph of the spherical aberration of a lens assembly. Fig.14b It is shown Fig.13 A graph of the astigmatism of a lens assembly. Fig.14c It is shown Fig.13 A graph showing the distortion of a lens assembly. Figure 13 to Figure 1 4C, according to various embodiments of the present disclosure Figures 3a to 4c The lens assembly 800 of another embodiment different from the embodiment may include a plurality of lenses, an image sensor IS and / or an optical filter F. Here, according to Figure 13 to Figure 14cThe lens assembly of the embodiment shown in may include 4 lenses. The lens assembly 800 may include a first lens L1, a second lens L2, a third lens L3, and a fourth lens L4. The difference between the lens assembly 800 and the above-mentioned embodiment may be that it includes a first lens L1 having a glass material. The lens assembly 800 may include a reflective member M capable of changing the path of light passing through the fourth lens L4 at least twice or more. The lens assembly 800 may use a prism as the reflective member M. The following Table 11 may represent the Figure 13 to 1 4C embodiment of the lens assembly 800. In the following Table 11, the parts marked with the symbol "*" (such as "S2*, S3*, S4*, S5*, S7*, S8*, and S9*") may indicate the surface of the lens to which the aspherical surface is applied. The following Table 12 may respectively show the data for defining the aspherical coefficients of the plurality of lenses.

[0168] The lens assembly 800 included in the following Table 11 may relate to a telephoto lens having a field of view (FOV) of 17.6 degrees. In addition, when the total focal length (EFL) is 27.000 mm, the F number (Fno) is about 3.649, and the optical total length (OTTL) from the imaging plane is 30.564 mm, the lens assembly 800 included in Table 11 may satisfy the above conditions (and / or at least one of the above conditions).

[0169] [Table 11]

[0170]

[0171]

[0172] [Table 12]

[0173]

[0174] In the above embodiments, in the lens assemblies 300, 400, 500, 600, 700 and 800 and / or the electronic device 101 including the lens assembly, various types of data about the lens may be identified. These data may satisfy the above conditions.

[0175] [Table 13]

[0176]

[0177]

[0178] In the above Table 13, "Example 1", "Example 2", "Example 3" and "Example 4" can respectively represent Figure 3a Lens assembly 300, Figure 5 Lens assembly 400, Figure 7 The lens assembly 500, Fig. 9 Lens assembly 600, Fig.11 The lens assembly 700 and Fig.13 lens assembly 800. Embodiment 1, Embodiment 3, Embodiment 4, Embodiment 5, and Embodiment 6 may use a prism as a reflecting member, and Embodiment 2 may use a plane mirror as a reflecting member. "BFL / EFL" may indicate the above conditional equation 1, "OTTL / EFL" may indicate the above conditional equation 3, "EFL / EFL1" may indicate the above conditional equation 4, "EFL / L1LL" may indicate the above conditional equation 5, "L1S3 / L1S2" may indicate the above conditional equation 6, and "BFL / L1LL" may indicate the above conditional equation 7. For reference, conditional equation 2 is an equation representing the field of view of the lens assembly of the present disclosure, and is omitted from Table 13.

[0179] The above-mentioned lens assembly can be equipped in an electronic device (e.g., an optical device). In addition to the image sensor, the electronic device (e.g., an optical device) may further include an application processor (AP) and drive an operating system (OS) or an application program through the application processor (AP), thereby controlling multiple hardware components or software components connected to the AP and performing processing and calculations on various data. For example, the application processor (AP) may also include a graphics processing unit (GPU) and / or an image signal processor. When the application processor (AP) includes an image signal processor, the image (or video) obtained by the image sensor IS may be stored or output through the application processor.

[0180] The electronic device according to various embodiments of the present disclosure may be one of various types of electronic devices. The electronic device may include, for example, a portable communication device (e.g., a smart phone), a computer device, a portable multimedia device, a portable medical device, a camera, a wearable device, or a household appliance. According to an embodiment of the present disclosure, the electronic device is not limited to those electronic devices described above.

[0181] It should be understood that the specific embodiments of the present disclosure and the terms used therein are not intended to limit the technical features set forth herein to specific embodiments, but include various changes, equivalents or alternative forms for the corresponding embodiments. For the description of the accompanying drawings, similar reference numerals may be used to refer to similar or related elements. It will be understood that the noun corresponding to the item in the singular form may include one or more things unless the relevant context clearly indicates otherwise. As used herein, each phrase in the 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 the items listed together with the corresponding one of the multiple phrases. As used herein, terms such as "1st" and "2nd" or "first" and "second" may be used to simply distinguish the corresponding component from another component, and do not limit the component in other aspects (e.g., importance or order). It will be understood that if an element (e.g., a first element) is referred to as being “combined with another element (e.g., the second element)”, “combined to another element (e.g., the second element)”, “connected with another element (e.g., the second element)”, or “connected to another element (e.g., the second element)” when the terms “operably” or “communicatively” are used or when the terms “operably” or “communicatively” are not used, it means that the element may be directly (e.g., wired) connected to the other element, wirelessly connected to the other element, or connected to the other element via a third element.

[0182] As used herein, the term "module" may include a unit implemented in hardware, software, or firmware, and may be used interchangeably with other terms (e.g., "logic," "logic block," "part," or "circuit"). A module may be a single integrated component adapted to perform one or more functions or a minimum unit or part of the single integrated component. For example, according to an embodiment, a module may be implemented in the form of an application specific integrated circuit (ASIC).

[0183] The embodiments described herein may be implemented as software (e.g., program 140) including one or more instructions stored in a storage medium (e.g., internal memory 136 or external memory 138) that can be read by a machine (e.g., electronic device 101). For example, under the control of a processor, a processor (e.g., processor 120) of the machine (e.g., electronic device 101) may call at least one of the one or more instructions stored in the storage medium and execute the at least one instruction with or without the use of one or more other components. This enables the machine to operate to perform at least one function according to at least one instruction called. The one or more instructions may include code generated by a compiler or code that can be run by an interpreter. A machine-readable storage medium may be provided in the form of a non-transitory storage medium. Among them, the term "non-transitory" only means that the storage medium is a tangible device and does not include a signal (e.g., an electromagnetic wave), but the term does not distinguish between data being semi-permanently stored in a storage medium and data being temporarily stored in a storage medium.

[0184] According to an embodiment, the method according to various embodiments of the present disclosure may be included and provided in a computer program product. The computer program product may be traded between a seller and a buyer as a product. The computer program product may be released in the form of a machine-readable storage medium (e.g., a compact disk read-only memory (CD-ROM)), or may be downloaded via an application store (e.g., Play Store TM ) The computer program product may be published (e.g., downloaded or uploaded) online, or the computer program product may be distributed (e.g., downloaded or uploaded) directly between two user devices (e.g., smart phones). If published online, at least part of the computer program product may be temporarily generated, or at least part of the computer program product may be at least temporarily stored in a machine-readable storage medium (such as a memory of a manufacturer's server, an application store's server, or a forwarding server).

[0185] According to various embodiments, each component (e.g., module or program) of the above-mentioned components may include a single entity or multiple entities. Some of the multiple entities may be separately arranged in different components. According to various embodiments, one or more of the above-mentioned components may be omitted, or one or more other components may be added. Alternatively or additionally, multiple components (e.g., module or program) 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 one of the multiple components before integration. According to various embodiments, the operations performed by a module, program or another component may be performed sequentially, in parallel, repeatedly or in a heuristic manner, or one or more of the operations may be run or omitted in a different order, or one or more other operations may be added.

[0186] According to an embodiment of the present disclosure, the electronic device 101 may include: a lens assembly (210; 300; 400; 500; 600; 700; 800), in which at least four lenses are aligned from the object O side to the image I side along the optical axis OI direction; an image sensor IS, including an imaging plane "img" on which an image is formed; and at least one reflective member M, which is arranged between the lens assembly and the image sensor. At least one of the object surface S2 and the image surface S3 of the first lens L1 from the object side of the at least four lenses may be formed as an aspherical surface. The object surface and the image surface may be formed as a convex shape. In this case, the electronic device may satisfy the following conditional equations 1 and 2.

[0187] [Conditional equation 1]

[0188] 0.6 <BFL / EFL<1.1

[0189] [Conditional equation 2]

[0190] 15 <FOV<35

[0191] (Wherein, in conditional equation 1, BFL is the distance from the image-side surface of the lens closest to the imaging plane to the image sensor, and EFL is the total focal length of the lens assembly, and in conditional equation 2, FOV is the field of view of the entire optical system including the lens assembly.

[0192] According to an embodiment, the reflective member may be configured to change a path of light at least twice.

[0193] According to an embodiment, at least two or more reflective members may be disposed between the lens assembly and the image sensor.

[0194] According to an embodiment, a path of a principal ray passing through the reflective member may be parallel to a principal ray incident on the lens assembly.

[0195] According to an embodiment, the electronic device may satisfy the following condition Equation 3.

[0196] [Conditional equation 3]

[0197] 0.8 <OTTL / EFL<1.4

[0198] (wherein, in Conditional Equation 3, OTTL is the distance from the vertex of the object surface of the first lens from the object side to the image sensor, and EFL is the total focal length of the lens assembly).

[0199] According to an embodiment, the electronic device may satisfy the following condition Equation 4.

[0200] [Conditional equation 4]

[0201] 2.5 <EFL / EFL1<3.4

[0202] (Wherein, in conditional equation 4, EFL is the total focal length of the lens assembly, and EFL1 is the focal length of the first lens from the object side).

[0203] According to an embodiment, the reflective member may be a plane mirror or a prism.

[0204] According to an embodiment, the electronic device may satisfy the following condition Equation 5.

[0205] [Conditional Equation 5]

[0206] 2.5 <EFL<L1LL<4.2

[0207] (Wherein, in Conditional Equation 5, EFL is the total focal length of the lens assembly, and L1LL is the distance from the vertex of the object surface of the first lens from the object side to the vertex of the image surface of the lens closest to the image side).

[0208] According to an embodiment, an image height IMG HT of the image sensor may have a size of 4.0 mm or more.

[0209] (Wherein, the IMG HT of the image sensor may correspond to half of the diagonal length of the image sensor).

[0210] According to an embodiment, a first lens from the object side among the plurality of lenses included in the lens assembly may have positive refractive power, and a second lens from the object side among the plurality of lenses included in the lens assembly may have negative refractive power.

[0211] According to an embodiment, the electronic device may satisfy the following condition Equation 6.

[0212] [Conditional expression 6]

[0213] -4.5 <L1S3 / L1S2<-0.6

[0214] (In Conditional Expression 6, L1S3 is the curvature of the image-side surface of the first lens from the object side, and L1S2 is the curvature of the object-side surface of the first lens from the object side).

[0215] According to an embodiment, the stop 'sto' may be disposed between the second lens from the object side and the third lens from the object side of the lens assembly.

[0216] According to an embodiment of the present disclosure, the electronic device 101 may include: a lens assembly (210; 300; 400; 500; 600; 700; 800), in which at least four lenses are aligned along the optical axis direction from the object side to the image side; an image sensor IS, including an imaging plane on which an image is formed; and at least one reflective member M, which is arranged between the lens assembly and the image sensor. The at least one reflective member M may include a prism or a plane mirror. The at least one reflective member may be configured to change the path of light at least twice. The path of the main light passing through the at least one reflective member may be parallel to the main light incident on the lens assembly. In this case, the electronic device may satisfy the following conditional equations 1 and 2.

[0217] [Conditional equation 1]

[0218] 0.6 <BFL / EFL<1.1

[0219] [Conditional equation 2]

[0220] 15 <FOV<35

[0221] (Wherein, in conditional equation 1, BFL is the distance from the image-side surface of the lens closest to the imaging plane to the image sensor, and EFL is the total focal length of the lens assembly, and in conditional equation 2, FOV is the field of view of the entire optical system including the lens assembly.

[0222] According to an embodiment, at least two or more reflective members may be disposed between the lens assembly and the image sensor.

[0223] According to an embodiment, the electronic device may satisfy the following condition Equation 3.

[0224] 0.8 <OTTL / EFL<1.4

[0225] (wherein, in Conditional Equation 3, OTTL is the distance from the vertex of the object surface of the first lens from the object side to the image sensor, and EFL is the total focal length of the lens assembly).

[0226] According to an embodiment, the electronic device may satisfy the following condition Equation 4.

[0227] [Conditional equation 4]

[0228] 2.5 <EFL / EFL1<4.3

[0229] (Wherein, in conditional equation 4, EFL is the total focal length of the lens assembly, and EFL1 is the focal length of the first lens from the object side).

[0230] According to an embodiment, the electronic device may satisfy the following condition Equation 5.

[0231] [Conditional Equation 5]

[0232] 2.5 <EFL / L1LL<4.2

[0233] (wherein, in Conditional Equation 5, EFL is the total focal length of the lens assembly, and L1LL is the distance from the vertex of the object-side surface of the first lens from the object side to the vertex of the image-side surface of the lens closest to the image side).

[0234] According to an embodiment, an image height of the image sensor may be 4.0 mm or more.

[0235] (Wherein, the IMG HT of the image sensor may correspond to half of the diagonal length of the image sensor).

[0236] According to an embodiment, the electronic device may satisfy the following condition Equation 6.

[0237] [Conditional expression 6]

[0238] -4.5 <L1S3 / L1S2<-0.6

[0239] (In Conditional Expression 6, L1S3 is the curvature of the image-side surface of the first lens from the object side, and L1S2 is the curvature of the object-side surface of the first lens from the object side).

[0240] Although the present disclosure has been shown and described with reference to example embodiments thereof, it will be apparent to those skilled in the art that various changes in form and detail may be made thereto without departing from the spirit and scope of the present disclosure as defined by the appended claims. For example, in a specific embodiment of the present disclosure, the measurement of multiple lenses may be appropriately set according to the structure, specifications, or actual use environment of an actually manufactured lens assembly or an electronic device equipped with the lens assembly.

Claims

1. An electronic device (101), comprising: A lens assembly (210; 300; 400; 500; 600; 700; 800) in which at least four lenses are aligned along an optical axis (OI) in a direction from an object (O) side to an image (I) side; an image sensor (IS) comprising an imaging plane (img) wherein an image is formed on said imaging plane; and at least one reflective member (M) disposed between the lens assembly and the image sensor, wherein the reflective member is configured to refract or reflect light at least twice, wherein at least one of the object-side surface (S2) and the image-side surface (S3) of the first lens (L1) from the object side among the at least four lenses is formed as an aspherical surface, wherein the object-side surface and the image-side surface are formed as convex surfaces, The electronic device satisfies the following condition equation 1 and condition equation 2: [Conditional equation 1] 0.6 <BFL / EFL<1.1 [Conditional equation 2] 15 <FOV<35 (wherein, in conditional equation 1, BFL is the back focal length indicating the distance from the image-side surface of the lens closest to the imaging plane to the image sensor, EFL is the effective focal length indicating the overall focal length of the lens assembly, and in conditional equation 2, FOV is the field of view of the entire optical system including the lens assembly).

2. The electronic device according to claim 1, wherein: The reflective member includes at least two reflective surfaces.

3. The electronic device according to claim 1 or 2, wherein: At least two or more reflective members are disposed between the lens assembly and the image sensor.

4. The electronic device as claimed in claim 3, wherein: A path of a principal ray passing through the reflective member is parallel to a path of a principal ray incident on the lens assembly.

5. The electronic device according to any one of claims 1 to 4, wherein: The electronic device satisfies the following condition Equation 3: [Conditional equation 3] 0.8 <OTTL / EFL<1.4 (wherein, in Conditional Equation 3, OTTL is an optical total length indicating a distance from a vertex of an object-side surface of a first lens from the object side to the image sensor).

6. The electronic device according to any one of claims 1 to 5, wherein: The electronic device satisfies the following condition Equation 4: [Conditional equation 4] 2.5 <EFL / EFL1<4.3 (Wherein, in conditional equation 4, EFL1 is the effective focal length of the first lens from the object side).

7. The electronic device according to any one of claims 1 to 6, wherein: The reflecting member includes a plane mirror or a prism.

8. The electronic device according to any one of claims 1 to 7, wherein: The electronic device satisfies the following condition Equation 5: [Conditional Equation 5] 2.5 <EFL / L1LL<4.2 (Wherein, in Conditional Equation 5, L1LL is the distance from the vertex of the object-side surface of the first lens from the object side to the vertex of the image-side surface of the lens closest to the image side).

9. The electronic device according to any one of claims 1 to 8, wherein: The image sensor has an image height (IMGHT) of 4.0 m or greater, (Wherein, the image height (IMG HT) of the image sensor corresponds to half of the diagonal length of the image sensor).

10. The electronic device according to any one of claims 1 to 9, wherein: A first lens from the object side among the plurality of lenses included in the lens assembly has positive refractive power, and Among them, the second lens from the object side among the multiple lenses included in the lens assembly has negative refractive power.

11. The electronic device according to any one of claims 1 to 10, wherein: The electronic device satisfies the following condition Equation 6: [Conditional expression 6] -4.5 <L1S3 / L1S2<-0.6 (in, In Conditional Expression 6, L1S3 is the curvature of the image-side surface of the first lens from the object side, and L1S2 is the curvature of the object-side surface of the first lens from the object side).

12. The electronic device according to any one of claims 1 to 11, wherein: The aperture stop is disposed between the second lens from the object side and the third lens from the object side of the lens assembly.

13. The electronic device according to any one of claims 1 to 12, wherein: The electronic device satisfies the following condition Equation 7: [Conditional expression 7] 2.1 <BFL / L1LL<3.8 (Wherein, in Conditional Equation 1, L1LL is the distance from the vertex of the object-side surface of the first lens from the object side to the vertex of the image-side surface of the lens closest to the image side).

14. The electronic device according to any one of claims 1 to 13, wherein: A first lens (L1) from the object side among a plurality of lenses included in the lens assembly includes a synthetic resin material.

15. The electronic device according to any one of claims 1 to 14, wherein: A second lens (L2) from the object side among the plurality of lenses included in the lens assembly has a concave object side surface.

Images