Lens assembly and electronic device comprising same

Abstract

According to an embodiment of the present disclosure, an electronic device (101) may be provided. The electronic device may comprise a lens assembly. The lens assembly may comprise: a lens group including a plurality of lenses arranged along a part of an optical axis in the direction from a subject side to an image side; an image sensor including an image-forming surface on which an image is formed; and a reflective member disposed between the lens group and the image sensor and configured to change a path of light having passed through the lens group once or twice. A first lens closest to the subject side among the plurality of lenses may comprise a synthetic resin and have positive refractive power, and the subject-side surface of the first lens may be formed to be convex toward the subject side. A second lens, which is the second closest lens to the subject side among the plurality of lenses, may have negative refractive power, the image-side surface of the second lens may be formed to be concave toward the image side, and at least one of the subject-side and image-side surfaces of the second lens may be formed as an aspheric surface. The subject-side surface of a lens closest to the image side among the plurality of lenses may be formed to be convex toward the subject side, and at least one of the subject-side and image-side surfaces of the lens closest to the image side may be formed as an aspheric surface. Various other embodiments are also possible.

Description

Lens assembly and electronic device including same

[0001] Examples of the present disclosure relate to a lens assembly and an electronic device including the same.

[0002] An optical device (e.g., a camera) may include an optical system including a plurality of lenses and an image sensor (e.g., a solid-state image sensor (CCD or CMOS)) having a high pixel count. For example, the lens assembly may be implemented to have a low F-number (Fno) and low aberration to obtain high-quality (high-resolution) images (or images and / or videos).

[0003] In miniaturized electronic devices such as mobile terminals, the overall length (e.g., the overall length and / or height in the direction of the optical axis) of the lens assembly is limited, so it may be difficult to secure a sufficient telephoto ratio to implement the function of a telephoto lens. Here, a limitation on the overall length of the lens assembly may mean, for example, a limitation on the number of lenses included in the lens assembly. If the number of lenses that can be mounted on the lens assembly is limited, it may be difficult to obtain high-quality images and / or videos. It may also be difficult to manufacture a lens assembly with a low F-number and low aberrations with only a limited number of lenses. To overcome this, a technology has been proposed to easily accommodate a lens assembly capable of securing a sufficient telephoto ratio in an electronic device by forming a folded optical system configured to reflect or refract the path of light at least once by arranging a reflective member (e.g., a mirror or prism) in front of the lens assembly.

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

[0005] According to one embodiment of the present disclosure, an electronic device may be provided. The electronic device may include a lens assembly. The lens assembly may include a lens group including a plurality of lenses aligned along a portion of an optical axis in a direction from a subject side toward an image side, an image sensor including an image-forming surface on which an image is formed, and a reflective member disposed between the lens group and the image sensor, the reflective member configured to change the path of light passing through the lens group once or twice. A first lens closest to the subject side among the plurality of lenses may include a synthetic resin and have positive refractive power, and a subject-side surface of the first lens may be formed to be convex toward the subject side. Among the plurality of lenses, the second lens, which is secondarily adjacent to the subject side, has negative refractive power, and the image-side surface of the second lens is formed to be concave toward the image side, and at least one of the subject-side surface or the image-side surface of the second lens may be formed as an aspherical surface. Among the plurality of lenses, the lens closest to the image side may have the subject-side surface formed to be convex toward the subject side, and at least one of the subject-side surface or the image-side surface of the lens closest to the image side may be formed as an aspherical surface. The lens assembly may satisfy the following [Conditional Expression 1] and [Conditional Expression 2].

[0006] [Condition 1]

[0007] 25 < L1 Abbe - L2 Abbe < 60

[0008] [Condition 2]

[0009] L3 Abbe < 21

[0010] (Here, L1 Abbe of [Conditional Expression 1] is the Abbe number of the first lens (L1), L2 Abbe is the Abbe number of the second lens (L2), and L3 Abbe of [Conditional Expression 2] is the Abbe number of the lens (L3) closest to the image side among the plurality of lenses.)

[0011] According to one embodiment of the present disclosure, a lens assembly may be provided. The lens assembly may include a lens group including a plurality of lenses aligned along a portion of an optical axis in a direction from a subject side toward an image side, an image sensor including an image-forming surface on which an image is formed, and a reflective member disposed between the lens group and the image sensor, the reflective member configured to change the path of light passing through the lens group once or twice. A first lens closest to the subject side among the plurality of lenses may include a synthetic resin and have positive refractive power, and a subject-side surface of the first lens may be formed to be convex toward the subject side. A second lens secondly adjacent to the subject side among the plurality of lenses may have negative refractive power, an image-side surface of the second lens may be formed to be concave toward the image side, and at least one of the subject-side surface or the image-side surface of the second lens may be formed to be aspherical. Among the plurality of lenses, the third lens (L3) that is the third most adjacent lens from the subject side has a subject-side surface (S6) formed to be convex toward the subject side, and at least one of the subject-side surface (S6) or the image-side surface (S7) of the third lens (L3) may be formed as an aspherical surface. The lens assembly may satisfy the following [Conditional Expression 1] and [Conditional Expression 2].

[0012] [Condition 1]

[0013] 25 < L1 Abbe - L2 Abbe < 60

[0014] [Condition 2]

[0015] L3 Abbe < 21

[0016] (Here, L1 Abbe of [Conditional Expression 1] is the Abbe number of the first lens (L1), L2 Abbe is the Abbe number of the second lens (L2), and L3 Abbe of [Conditional Expression 2] is the Abbe number of the lens (L3) closest to the image side among the plurality of lenses.)

[0017] In addition, various other embodiments are possible.

[0018] FIG. 1 is a block diagram of an electronic device within a network environment according to one embodiment of the present disclosure.

[0019] FIG. 2 is a block diagram illustrating a camera module according to one embodiment of the present disclosure.

[0020] FIG. 3 is a front perspective view of an electronic device according to one embodiment of the present disclosure.

[0021] FIG. 4 is a rear perspective view of an electronic device according to one embodiment of the present disclosure.

[0022] FIG. 5 is a schematic diagram showing a lens assembly according to one embodiment of the present disclosure.

[0023] FIG. 6 is a schematic diagram showing a lens assembly according to one embodiment of the present disclosure.

[0024] FIG. 7a is a schematic diagram showing a lens assembly according to one embodiment of the present disclosure.

[0025] FIG. 7b is a graph showing spherical aberration of the lens assembly of FIG. 7a, according to one embodiment of the present disclosure.

[0026] FIG. 7c is a graph showing astigmatism of the lens assembly of FIG. 7a, according to one embodiment of the present disclosure.

[0027] FIG. 7d is a graph showing the distortion aberration of the lens assembly of FIG. 7a according to one embodiment of the present disclosure.

[0028] FIG. 8A is a schematic diagram showing a lens assembly according to one embodiment of the present disclosure.

[0029] FIG. 8b is a graph showing spherical aberration of the lens assembly of FIG. 8a, according to one embodiment of the present disclosure.

[0030] FIG. 8c is a graph showing astigmatism of the lens assembly of FIG. 8a, according to one embodiment of the present disclosure.

[0031] FIG. 8d is a graph showing the distortion aberration of the lens assembly of FIG. 8a according to one embodiment of the present disclosure.

[0032] FIG. 9A is a schematic diagram showing a lens assembly according to one embodiment of the present disclosure.

[0033] FIG. 9b is a graph showing spherical aberration of the lens assembly of FIG. 9a, according to one embodiment of the present disclosure.

[0034] FIG. 9c is a graph showing astigmatism of the lens assembly of FIG. 9a, according to one embodiment of the present disclosure.

[0035] FIG. 9d is a graph showing the distortion aberration of the lens assembly of FIG. 9a according to one embodiment of the present disclosure.

[0036] FIG. 10A is a schematic diagram showing a lens assembly according to one embodiment of the present disclosure.

[0037] FIG. 10b is a graph showing spherical aberration of the lens assembly of FIG. 10a, according to one embodiment of the present disclosure.

[0038] FIG. 10c is a graph showing astigmatism of the lens assembly of FIG. 10a, according to one embodiment of the present disclosure.

[0039] FIG. 10d is a graph showing the distortion aberration of the lens assembly of FIG. 10a according to one embodiment of the present disclosure.

[0040] FIG. 11A is a schematic diagram showing a lens assembly according to one embodiment of the present disclosure.

[0041] FIG. 11b is a graph showing spherical aberration of the lens assembly of FIG. 11a, according to one embodiment of the present disclosure.

[0042] FIG. 11c is a graph showing astigmatism of the lens assembly of FIG. 11a, according to one embodiment of the present disclosure.

[0043] FIG. 11d is a graph showing the distortion aberration of the lens assembly of FIG. 11a according to one embodiment of the present disclosure.

[0044] FIG. 12a is a schematic diagram showing a lens assembly according to one embodiment of the present disclosure.

[0045] FIG. 12b is a graph showing spherical aberration of the lens assembly of FIG. 12a, according to one embodiment of the present disclosure.

[0046] FIG. 12c is a graph showing astigmatism of the lens assembly of FIG. 12a, according to one embodiment of the present disclosure.

[0047] FIG. 12d is a graph showing the distortion aberration of the lens assembly of FIG. 12a according to one embodiment of the present disclosure.

[0048] Throughout the attached drawings, similar reference numbers may be assigned to similar parts, components and / or structures.

[0049] FIG. 1 is a block diagram of an electronic device (101) within a network environment (100) according to one embodiment of the present disclosure. Referring to FIG. 1 , in the network environment (100), the electronic device (101) may communicate with an electronic device (102) via a first network (198) (e.g., a short-range wireless communication network), or may communicate with at least one of an electronic device (104) or a server (108) via a second network (199) (e.g., a long-range wireless communication network). According to one embodiment, the electronic device (101) may communicate with the electronic device (104) via the server (108). According to one embodiment, the electronic device (101) may include a processor (120), a memory (130), an input module (150), an audio output module (155), a display module (160), an audio module (170), a sensor module (176), an interface (177), a connection terminal (178), a haptic module (179), a camera module (180), a power management module (188), a battery (189), a communication module (190), a subscriber identification module (196), or an antenna module (197). In one embodiment, the electronic device (101) may have at least one of these components (e.g., the connection terminal (178)) omitted, or one or more other components added. In one embodiment, some of these components (e.g., the sensor module (176), the camera module (180), or the antenna module (197)) may be integrated into one component (e.g., the display module (160)).

[0050] The processor (120) may, for example, execute software (e.g., a program (140)) to control at least one other component (e.g., a hardware or software component) of the electronic device (101) connected to the processor (120) and perform various data processing or calculations. According to one embodiment, as at least a part of the data processing or calculation, the processor (120) may store a command or data received from another component (e.g., a sensor module (176) or a communication module (190)) in a volatile memory (132), process the command or data stored in the volatile memory (132), and store the resulting data in a non-volatile memory (134). According to one embodiment, the processor (120) may include a main processor (121) (e.g., a central processing unit or an application processor), or an auxiliary processor (123) (e.g., a graphics processing unit, a neural processing unit (NPU), an image signal processor, a sensor hub processor, or a communication processor) that can operate independently or together therewith. For example, if the electronic device (101) includes a main processor (121) and a secondary processor (123), the secondary processor (123) may be configured to use less power than the main processor (121) or to be specialized for a specified function. The secondary processor (123) may be implemented separately from the main processor (121) or as a part thereof.

[0051] The auxiliary processor (123) may control at least a portion of functions or states associated with at least one component (e.g., a display module (160), a sensor module (176), or a communication module (190)) of the electronic device (101), for example, on behalf of the main processor (121) while the main processor (121) is in an inactive (e.g., sleep) state, or together with the main processor (121) while the main processor (121) is in an active (e.g., application execution) state. In one embodiment, the auxiliary processor (123) (e.g., an image signal processor or a communication processor) may be implemented as a part of another functionally related component (e.g., a camera module (180) or a communication module (190)). In one embodiment, the auxiliary processor (123) (e.g., a neural network processing unit) may include a hardware structure specialized for processing artificial intelligence models. The artificial intelligence models may be generated through machine learning. This learning can be performed, for example, on the electronic device (101) itself where the artificial intelligence model is executed, or can be performed through a separate server (e.g., server (108)). The learning algorithm can include, for example, supervised learning, unsupervised learning, semi-supervised learning, or reinforcement learning, but is not limited to the examples described above. The artificial intelligence model can include multiple artificial neural network layers.The artificial neural network may be one of a deep neural network (DNN), a convolutional neural network (CNN), a recurrent neural network (RNN), a restricted Boltzmann machine (RBM), a deep belief network (DBN), a bidirectional recurrent deep neural network (BRDNN), a deep Q-network, or a combination of two or more of the above, but is not limited to the examples described above. In addition to, or alternatively to, a hardware structure, an artificial intelligence model may include a software structure.

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

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

[0054] The input module (150) can receive commands or data to be used in a component of the electronic device (101) (e.g., a processor (120)) from an external source (e.g., a user) of the electronic device (101). The input module (150) can include, for example, a microphone, a mouse, a keyboard, a key (e.g., a button), or a digital pen (e.g., a stylus pen).

[0055] The audio output module (155) can output audio signals to the outside of the electronic device (101). The audio output module (155) can include, for example, a speaker or a receiver. The speaker can be used for general purposes, such as multimedia playback or recording playback. The receiver can be used to receive incoming calls. In one embodiment, the receiver can be implemented separately from the speaker or as part of the speaker.

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

[0057] The audio module (170) can convert sound into an electrical signal, or vice versa, convert an electrical signal into sound. According to one embodiment, the audio module (170) can acquire sound through the input module (150), output sound through the sound output module (155), or an external electronic device (e.g., electronic device (102)) (e.g., speaker or headphone) directly or wirelessly connected to the electronic device (101).

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

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

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

[0061] A haptic module (179) can convert electrical signals into mechanical stimuli (e.g., vibration or movement) or electrical stimuli that a user can perceive through tactile or kinesthetic sensations. In one embodiment, the haptic module (179) can include, for example, a motor, a piezoelectric element, or an electrical stimulation device.

[0062] The camera module (180) can capture still images and videos. According to one embodiment, the camera module (180) may include one or more lenses, image sensors, image signal processors, or flashes.

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

[0064] A battery (189) may power at least one component of the electronic device (101). In one embodiment, the battery (189) may include, for example, a non-rechargeable primary battery, a rechargeable secondary battery, or a fuel cell.

[0065] The communication module (190) may support the establishment of a direct (e.g., wired) communication channel or a wireless communication channel between the electronic device (101) and an external electronic device (e.g., electronic device (102), electronic device (104), or server (108)), and the performance of communication through the established communication channel. The communication module (190) may operate independently from the processor (120) (e.g., application processor) and may include one or more communication processors that support direct (e.g., wired) communication or wireless communication. According to one embodiment, the communication module (190) may include a wireless communication module (192) (e.g., a cellular communication module, a short-range wireless communication module, or a global navigation satellite system (GNSS) communication module) or a wired communication module (194) (e.g., a local area network (LAN) communication module, or a power line communication module). Among these communication modules, the corresponding communication module can communicate with an external electronic device via a first network (198) (e.g., a short-range communication network such as Bluetooth, wireless fidelity (WiFi) direct, or infrared data association (IrDA)) or a second network (199) (e.g., a long-range communication network such as a legacy cellular network, a 5G network, a next-generation communication network, the Internet, or a computer network (e.g., a LAN or WAN)). These various types of communication modules can be integrated into a single component (e.g., a single chip) or implemented as multiple separate components (e.g., multiple chips). The wireless communication module (192) can verify or authenticate the electronic device (101) within a communication network such as the first network (198) or the second network (199) by using subscriber information (e.g., an international mobile subscriber identity (IMSI)) stored in the subscriber identification module (196).

[0066] The wireless communication module (192) can support 5G networks and next-generation communication technologies following the 4G network, such as NR access technology (new radio access technology). The NR access technology can support high-speed transmission of high-capacity data (eMBB (enhanced mobile broadband)), minimization of terminal power and connection of multiple terminals (mMTC (massive machine type communications)), or high reliability and low latency (URLLC (ultra-reliable and low-latency communications)). The wireless communication module (192) can support, for example, a high-frequency band (e.g., mmWave band) to achieve a high data transmission rate. The wireless communication module (192) can support various technologies for securing performance in a high-frequency band, such as beamforming, massive multiple-input and multiple-output (MIMO), full dimensional MIMO (FD-MIMO), array antenna, analog beam-forming, or large scale antenna. The wireless communication module (192) can support various requirements specified in the electronic device (101), an external electronic device (e.g., the electronic device (104)), or a network system (e.g., the second network (199)). According to one embodiment, the wireless communication module (192) can support a peak data rate (e.g., 20 Gbps or more) for eMBB realization, a loss coverage (e.g., 164 dB or less) for mMTC realization, or a U-plane latency (e.g., 0.5 ms or less for downlink (DL) and uplink (UL), or 1 ms or less for round trip) for URLLC realization.

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

[0068] In one embodiment, the antenna module (197) may form a mmWave antenna module. In one embodiment, the mmWave antenna module may include a printed circuit board, an RFIC disposed on or adjacent a first side (e.g., a bottom side) of the printed circuit board and capable of supporting a designated high-frequency band (e.g., a mmWave band), and a plurality of antennas (e.g., an array antenna) disposed on or adjacent a second side (e.g., a top side or a side side) of the printed circuit board and capable of transmitting or receiving signals in the designated high-frequency band.

[0069] At least some of the above components may be interconnected and exchange signals (e.g., commands or data) with each other via a communication method between peripheral devices (e.g., a bus, GPIO (general purpose input and output), SPI (serial peripheral interface), or MIPI (mobile industry processor interface)).

[0070] According to one embodiment, commands or data may be transmitted or received between the electronic device (101) and an external electronic device (104) via a server (108) connected to a second network (199). Each of the external electronic devices (102 or 104) may be the same or a different type of device as the electronic device (101). According to one embodiment, all or part of the operations executed in the electronic device (101) may be executed in one or more of the external electronic devices (102, 104, or 108). For example, when the electronic device (101) is to perform a certain function or service automatically or in response to a request from a user or another device, the electronic device (101) may, instead of or in addition to executing the function or service itself, request one or more external electronic devices to perform the function or at least a part of the service. One or more external electronic devices that receive the request may execute at least a portion of the requested function or service, or an additional function or service related to the request, and transmit the result of the execution to the electronic device (101). The electronic device (101) may process the result as is or additionally and provide it as at least a portion of a response to the request. For this purpose, cloud computing, distributed computing, mobile edge computing (MEC), or client-server computing technology may be used, for example. The electronic device (101) may provide an ultra-low latency service by using distributed computing or mobile edge computing, for example. In one embodiment, the external electronic device (104) may include an Internet of Things (IoT) device. The server (108) may be an intelligent server using machine learning and / or a neural network. According to one embodiment, the external electronic device (104) or the server (108) may be included in the second network (199).The electronic device (101) can be applied to intelligent services (e.g., smart home, smart city, smart car, or healthcare) based on 5G communication technology and IoT-related technology.

[0071] FIG. 2 is a block diagram (200) illustrating a camera module (290) (e.g., camera module (180) of FIG. 1) according to one embodiment of the present disclosure. Referring to FIG. 2, the camera module (290) may include a lens assembly (280), a flash (220), an image sensor (230), an image stabilizer (240), a memory (250) (e.g., a buffer memory), or an image signal processor (260). In one embodiment, the lens assembly (280) may include the image sensor (230). The lens assembly (280) may collect light emitted from a subject that is a target of image capturing. The lens assembly (280) may include one or more lenses. According to one embodiment, the camera module (290) may include a plurality of lens assemblies (280). In this case, the camera module (290) may form, for example, a dual camera, a 360-degree camera, or a spherical camera. Some of the plurality of lens assemblies (280) may have the same lens properties (e.g., angle of view, 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 the other lens assemblies. The lens assembly (280) may include, for example, a wide-angle lens or a telephoto lens.

[0072] The flash (220) can emit light used to enhance light emitted or reflected from a subject. In one embodiment, the flash (220) can include one or more light-emitting diodes (e.g., red-green-blue (RGB) LED, white LED, infrared LED, or ultraviolet LED), or a xenon lamp. The image sensor (230) can acquire an image corresponding to the subject by converting light emitted or reflected from the subject and transmitted through the lens assembly (280) into an electrical signal. In one embodiment, the image sensor (230) can include one image sensor selected from among image sensors having different properties, such as, for example, an RGB sensor, a black and white (BW) sensor, an IR sensor, or a UV sensor, a plurality of image sensors having the same property, or a plurality of image sensors having different properties. Each image sensor included in the image sensor (230) can be implemented using, for example, a CCD (charged coupled device) sensor or a CMOS (complementary metal oxide semiconductor) sensor.

[0073] The image stabilizer (240) can move at least one lens or image sensor (230) included in the lens assembly (280) in a specific direction or control the operating characteristics of the image sensor (230) (e.g., adjusting the read-out timing, etc.) in response to the movement of the camera module (290) or the electronic device (101) including the same. This allows compensating for at least some of the negative effects of the movement on the captured image. In one embodiment, the image stabilizer (240) can detect such movement of the camera module (290) or the electronic device (e.g., the electronic device (101) of FIG. 1) by using a gyro sensor (not shown) or an acceleration sensor (not shown) disposed inside or outside the camera module (290). In one embodiment, the image stabilizer (240) can be implemented as, for example, an optical image stabilizer. The memory (250) can temporarily store at least a portion of the image acquired through the image sensor (230) for the next image processing task. For example, when image acquisition is delayed due to the shutter, or when multiple images are acquired at high speed, the acquired original image (e.g., a Bayer-patterned image or a high-resolution image) is stored in the memory (250), and a corresponding copy image (e.g., a low-resolution image) can be previewed through the display module (160) of FIG. 1. Thereafter, when a specified condition is satisfied (e.g., a user input or a system command), at least a portion of the original image stored in the memory (250) can be acquired and processed, for example, by the image signal processor (260). According to one embodiment, the memory (250) can be configured as at least a portion of a memory (e.g., the memory (130) of FIG. 1) or as a separate memory that operates independently therefrom.

[0074] The image signal processor (260) can perform one or more image processing operations on an image acquired through an image sensor (230) or an image stored in a memory (250). The one or more image processing operations may include, for example, depth map generation, 3D modeling, panorama generation, feature 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, read-out timing control, etc.) on at least one of the components included in the camera module (290) (e.g., image sensor (230)). An image processed by the image signal processor (260) may be stored back in the memory (250) for further processing or provided to an external component of the camera module (290) (e.g., memory (130) of FIG. 1, display module (160), electronic device (102), electronic device (104), or server (108)). In one embodiment, the image signal processor (260) may include a processor (e.g., 1) may be configured as at least a part of the processor (120) or may be configured as a separate processor that operates independently of the processor (120). When the image signal processor (260) is configured as a separate processor from the processor (120), at least one image processed by the image signal processor (260) may be displayed through the display module (160) as is or after undergoing additional image processing by the processor (120).

[0075] According to one embodiment, an electronic device (e.g., the electronic device (101) of FIG. 1) may include a plurality of camera modules (290), each having different properties or functions. In this case, for example, at least one of the plurality of camera modules (290) may be a wide-angle camera, and at least another may be a telephoto camera. Similarly, at least one of the plurality of camera modules (290) may be a front camera, and at least another may be a rear camera.

[0076] FIG. 3 is a front perspective view of an electronic device according to one embodiment of the present disclosure. FIG. 4 is a rear perspective view of an electronic device according to one embodiment of the present disclosure.

[0077] The configuration of the electronic device (101) of FIGS. 3 and 4 may be all or part of the same as the configuration of the electronic device (101) of FIG. 1.

[0078] Referring to FIGS. 3 and 4 , an electronic device (101) according to one embodiment may include a housing (210) that includes a first side (or front side) (210A), a second side (or back side) (210B), and a side surface (210C) that surrounds a space between the first side (210A) and the second side (210B). In one embodiment (not shown), the housing (210) may refer to a structure that forms a portion of the first side (210A) of FIG. 2 , the second side (210B), and the side surface (210C) of FIG. 3 . According to one embodiment, the first side (210A) may be formed by a front plate (202) that is at least partially substantially transparent (e.g., a glass plate or a polymer plate including various coating layers). The second side (210B) may be formed by a substantially opaque back plate (211). The rear plate (211) may be formed of, for example, coated or colored glass, ceramic, polymer, metal (e.g., aluminum, stainless steel (STS), or magnesium), or a combination of at least two of the foregoing materials. The side surface (210C) may be formed by a side structure (or “side bezel structure”) (218) that is coupled to the front plate (202) and the rear plate (211) and comprises a metal and / or polymer. In one embodiment, the rear plate (211) and the side structure (218) may be formed integrally and comprise the same material (e.g., a metal material such as aluminum).

[0079] Although not shown, the front plate (202) may include a seamlessly extending region(s) that curves toward the rear plate (211) at least along a portion of an edge. In one embodiment, the front plate (202) (or the rear plate (211)) may include only one of the curved extending regions toward the rear plate (211) (or the front plate (202)) at one edge of the first surface (210A). In some embodiments, the front plate (202) or the rear plate (211) may be substantially flat, in which case it may not include a curved extending region. When it includes a curved extending region, the thickness of the electronic device (101) in the portion that includes the curved extending region may be less than that of the other portions.

[0080] According to one embodiment, the electronic device (101) may include one or more of a display (201), an audio module (not shown) including at least one sound hole (203, 207, 214) (e.g., audio module (170) of FIG. 1), a sensor module (204) (e.g., sensor module (176) of FIG. 1), a camera module (205, 212, 213) (e.g., camera module (180) of FIG. 1), a key input device (217) (e.g., input module (150) of FIG. 1), or a connector hole (208, 209) (e.g., connection terminal (178) of FIG. 1). In one embodiment, the electronic device (101) may omit at least one of the components (e.g., key input device (217) or light emitting element (206)) or may additionally include other components.

[0081] In one embodiment, the display (201) may be visually exposed, for example, through a substantial portion of the front plate (202). In one embodiment, at least a portion of the display (201) may be visually exposed through the front plate (202) forming the first surface (210A) or through a portion of a side surface (210C). In one embodiment, the corners of the display (201) may be formed to be substantially the same as the adjacent outer shape of the front plate (202). In one embodiment (not shown), in order to expand the area over which the display (201) is visually exposed, the gap between the outer edge of the display (201) and the outer edge of the front plate (202) may be formed to be substantially the same.

[0082] In one embodiment (not shown), a recess or opening may be formed in a part of a screen display area of ​​the display (201), and at least one of an acoustic hole (214), a sensor module (204), a camera module (205), and a light-emitting element (206) may be included that are aligned with the recess or opening. In one embodiment (not shown), at least one of an acoustic hole (214), a sensor module (204), a camera module (205), a fingerprint sensor (not shown), and a light-emitting element (206) may be included on a back surface of the screen display area of ​​the display (201). In one embodiment (not shown), the display (201) may be coupled to or disposed adjacent to a touch detection circuit, a pressure sensor capable of measuring the intensity (pressure) of a touch, and / or a digitizer that detects a magnetic field-type stylus pen. In one embodiment, at least a portion of the sensor module (204) and / or at least a portion of the key input device (217) may be positioned on the side (210C).

[0083] According to one embodiment, the audio module (not shown) may include a microphone hole (203) and sound holes (207, 214). The microphone hole (203) may have a microphone disposed inside to acquire external sound, and in one embodiment, multiple microphones may be disposed to detect the direction of the sound. According to one embodiment, the sound holes (207, 214) may include an external sound hole (207) and a receiver hole (214) for calls. In one embodiment, the sound holes (207, 214) and the microphone hole (203) may be implemented as a single hole, or a speaker may be included in the audio module without the sound holes (207, 214) (e.g., a piezo speaker).

[0084] According to one embodiment, the sensor module (204) may generate an electrical signal or data value corresponding to an internal operating state of the electronic device (101) or an external environmental state. The sensor module (204) may include, for example, a first sensor module (204) (e.g., a proximity sensor) and / or a second sensor module (not shown) (e.g., a fingerprint sensor) disposed on a first surface (210A) of the housing (210). According to an embodiment, an additional sensor module may be disposed on a second surface (210B) of the housing (210). The fingerprint sensor (not shown) may be disposed on not only the first surface (210A) (e.g., the display (201)) of the housing (210) but also the second surface (210B) or the side surface (210C). The electronic device (101) may further include, for example, at least one of a gesture sensor, a gyro sensor, a pressure sensor, a magnetic sensor, an acceleration sensor, a grip sensor, a color sensor, an IR (infrared) sensor, a biometric sensor, a temperature sensor, a humidity sensor, or an illuminance sensor.

[0085] In one embodiment, the camera modules (205, 212, 213) may include a first camera module (205) facing the first side (210A) of the electronic device (101), and a second camera module (212) and / or a flash (213) facing the second side (210B). For example, the first camera module (205) and / or the second camera module (212) may include one or more lenses, an image sensor, and / or an image signal processor. In one embodiment, some of the camera modules (205) and / or some of the sensor modules (e.g., the sensor module (204)) among the camera modules (205, 212) may be arranged to be exposed to the outside through at least a portion of the display (201). In one embodiment, the first camera module (205) may include a punch hole camera arranged inside a hole or recess formed on the back surface of the display (201). For example, the first camera module (205) may receive at least a portion of light incident on the first side (210A) (or front side) of the electronic device (101) through the display (201) within the electronic device (101). According to one embodiment, the first camera module (205) and / or the sensor module (204) may be arranged so as to be in contact with the external environment through a transparent area from the internal space of the electronic device (101) to the front plate (202) of the display (201). Additionally, some of the sensor modules (204) may be arranged so as to perform their functions without being visually exposed through the front plate (202) within the internal space of the electronic device.

[0086] In one embodiment, the second camera module (212) may be disposed inside the housing (210) such that the lens is exposed to the second side (210B) (or back) of the electronic device (101). For example, the camera module (212) may be electrically connected to a printed circuit board (e.g., the printed circuit board (240a) of FIG. 4). For example, the flash (213) may include a light-emitting diode or a xenon lamp. In one embodiment, one or more lenses (an infrared camera, a wide-angle lens, and a telephoto lens) and image sensors may be disposed on one side of the electronic device (101). In one embodiment, the flash (213) may emit infrared light. For example, infrared light emitted from the flash (213) and reflected by a subject may be received through a sensor module (not shown) disposed on the second side (210B) of the housing (210). An electronic device (101) or processor (e.g., processor (180) of FIG. 1) can detect depth information of a subject based on the point in time when infrared rays are received from the sensor module.

[0087] The camera modules (205, 212, 213) are not limited to the above structure, and may be designed in various ways, such as by mounting only some camera modules or adding new camera modules, depending on the structure of the electronic device (101).

[0088] According to one embodiment, the electronic device (101) may include a plurality of camera modules (e.g., dual cameras or triple cameras) each having different properties (e.g., angles of view) or functions. For example, the electronic device (101) may include a plurality of camera modules (205, 212) each having a different angle of view, and the electronic device (101) may control the camera modules (205, 212) to change the angle of view of the camera modules (205, 212) operated in the electronic device (101) based on a user's selection. For example, at least one of the plurality of camera modules (205, 212) may be a wide-angle camera, and at least another may be a telephoto camera. Similarly, at least one of the plurality of camera modules (205, 212) may be a front camera, and at least another may be a rear camera. Additionally, the plurality of camera modules (205, 212) may include at least one of a wide-angle camera, a telephoto camera, or an infrared (IR) camera (e.g., a time of flight (TOF) camera, a structured light camera). In one embodiment, the IR camera may be operated as at least a part of a sensor module. For example, the TOF camera may be operated as at least a part of a sensor module (not shown) for detecting a distance to a subject.

[0089] In one embodiment, the key input device (217) may be disposed on a side surface (210C) of the housing (210). In one embodiment, the electronic device (101) may not include some or all of the above-mentioned key input devices (217), and the key input devices (217) that are not included may be implemented in other forms, such as soft keys, on the display (201). In one embodiment, the key input device may include a sensor module disposed on a second surface (210B) of the housing (210).

[0090] In one embodiment, the light emitting element (206) may be disposed, for example, on the first surface (210A) of the housing (210). The light emitting element (206) may provide, for example, status information of the electronic device (101) in the form of light. In one embodiment, the light emitting element (206) may provide a light source that is linked to a process of, for example, the camera module (205). The light emitting element (206) may include, for example, an LED, an IR LED, and a xenon lamp.

[0091] According to one embodiment, the connector holes (208, 209) may include a first connector hole (208) that can accommodate a connector (e.g., a USB connector) for transmitting and receiving power and / or data with an external electronic device, and / or a second connector hole (e.g., an earphone jack) (209) that can accommodate a connector for transmitting and receiving audio signals with an external electronic device.

[0092] Fig. 5 is a schematic diagram showing a lens assembly according to one embodiment of the present disclosure. Fig. 6 is a schematic diagram showing a lens assembly according to one embodiment of the present disclosure.

[0093] Referring to FIGS. 5 and 6, in one embodiment, an electronic device (e.g., the electronic device (101) of FIGS. 1, 3, and 4) may include a lens assembly (300) (e.g., the lens assembly (280) of FIG. 2) (or an optical system). A lens assembly (300) according to one embodiment of the present disclosure (e.g., lens assembly (400) of FIG. 7A, lens assembly (500) of FIG. 8A, lens assembly (600) of FIG. 9A, lens assembly (700) of FIG. 10A, lens assembly (800) of FIG. 11A, and / or lens assembly (900) of FIG. 12A) can constitute an optical device such as a camera mounted on an electronic device (101) (e.g., camera module (180) of FIG. 1, camera module (290) of FIG. 2, camera module (205) of FIG. 3, and / or camera module (212) of FIG. 4).

[0094] According to one embodiment, the lens assembly (300) may include an image sensor (IS), a lens group including a plurality (e.g., three) lenses (L1, L2, L3), a reflective member (M), and / or an aperture (sto). According to one embodiment, the lens assembly (300) may be arranged on an optical axis (OI) extending from a direction in which a subject (or external object) (O) is located to an imaging plane (img) (or image sensor (IS)) on which an image (I) is formed. For example, the lenses (L1, L2, L3), the aperture (sto), the reflective member (M), and / or the image sensor (IS) may be substantially aligned on the optical axis (OI).

[0095] According to one embodiment, the image sensor (IS) may include an imaging plane (img), which is a plane on which at least a portion of light focused through an aperture (sto) and / or lenses (L1, L2, L3) is formed and on which an image is formed. According to one embodiment, the image sensor (IS) is a sensor that is mounted on a circuit board or the like and arranged in a state aligned with an optical axis, and may react to light. The image sensor (IS) may include a sensor such as a complementary metal-oxide semiconductor (CMOS) image sensor or a charge coupled device (CCD). The image sensor (IS) is not limited thereto, and may include various elements that convert an image of a subject into an electrical image signal, for example. The image sensor (IS) may acquire an image of a subject by detecting brightness information, gradation information, color information, etc. of the subject from light passing through a plurality of lenses.

[0096] Referring to FIG. 5, according to one embodiment, the imaging plane (img) of the image sensor (IS) may be arranged to be inclined with respect to a first direction in which a plurality of lenses (L1, L2, L3) of the lens group are arranged. Here, the first direction may refer to a direction parallel to a portion of an optical axis (OI) passing through the centers of the lenses (L1, L2, L3). In the embodiment of FIG. 5, for example, the imaging plane (img) of the image sensor (IS) may form an angle of about 30 degrees to about 45 degrees with respect to the first direction. Referring to FIG. 6, according to one embodiment, the imaging plane (img) of the image sensor (IS) may be arranged parallel to or in parallel with the first direction in which a plurality of lenses (L1, L2, L3) of the lens group are arranged. However, the arrangement of the image sensor (IS) in the present disclosure is not limited to the embodiments of FIGS. 5 and 6, and may be set and changed according to factors such as the magnification of the telephoto lens to be implemented with the lens assembly (300) and the design of the light path using the lenses (L1, L2, L3) and the reflective member (M).

[0097] According to some embodiments, at least one lens among the plurality of lenses included in the lens assembly (300) may include a lens formed of a synthetic resin (e.g., plastic). By manufacturing the plurality of lenses included in the lens assembly (300) as lenses formed of a synthetic resin (e.g., plastic) having a predetermined refractive index, the degree of freedom in designing the size and shape of the lens assembly may be high. By manufacturing the plurality of lenses included in the lens assembly as lenses formed of a synthetic resin (e.g., plastic) having a predetermined refractive index, the weight of the lens assembly may be reduced and the manufacturing cost may be reduced compared to forming the lens assembly by including a glass material, for example. For example, since the plurality of lenses included in the lens assembly (300) are formed of a synthetic resin material, it may be advantageous for reducing the weight and miniaturization of an electronic device (e.g., the electronic device (101) of FIGS. 1 to 3) in which the lens assembly (300) is mounted.

[0098] According to one embodiment, at least some of the lenses (L1, L2, L3) may have at least one of the subject-side surface or the image-side surface formed as an aspheric surface. For example, by forming the surfaces of the lenses (L1, L2, L3) as an aspheric surface, spherical aberration that may occur in the lenses can be suppressed, occurrence of coma in the periphery of the image sensor (IS) can be prevented, control of astigmatism can be facilitated, and occurrence of field curvature from the center to the periphery of the image forming plane (img) of the image sensor (IS) can be reduced.

[0099] Referring to FIGS. 5 and 6, in one embodiment, the lens group of the lens assembly (300) may include a plurality of lenses (e.g., at least three). According to one embodiment, the lens group of the lens assembly (300) may include a first lens (L1), a second lens (L2), and a third lens (L3) sequentially arranged and / or aligned along the optical axis (OI) from the object side to the image side. For example, the centers of the lenses (L1, L2, L3) may be arranged on the optical axis (OI). However, in the present disclosure, the number of lenses is not limited to the embodiments of FIGS. 5 and 6. For example, the lens group of the lens assembly (300) may include four or more lenses, and may further include an additional lens aligned along the optical axis (OI) together with, for example, the first lens (L1), the second lens (L2), and the third lens (L3).

[0100] In the present disclosure, the object side may indicate the direction in which the subject (O) is located, and the image side may indicate the direction in which the imaging plane (img) (or image sensor (IS)) on which the image (I) is formed is located. In the following description, for example, the lenses (L1, L2, L3) and / or the reflective member (M) may each include a 'subject side', which is a side facing the subject (O), and an 'image side', which is a side facing the imaging plane (img) on ​​which the image (I) is formed. For example, the first lens (L1) may include a subject side (S2) and an image side (S3). For example, the second lens (L2) may include a subject side (S4) and an image side (S5). For example, the third lens (L3) may include a subject side (S6) and an image side (S7).

[0101] In the following description of the lenses, the shape of the subject-side surface, which is the surface facing the subject (O) side of the lenses (L1, L2, L3), and / or the image-side surface, which is the surface facing the image sensor (IS) (or imaging plane (img)), may be described using the terms 'concave' or 'convex'. For example, 'the subject-side surface is concave (toward the subject)' may describe a shape in which the center of the curvature radius of the subject-side surface is located on the subject (O) side. 'the subject-side surface is convex (toward the subject)' may describe a shape in which the center of the curvature radius of the subject-side surface is located on the image sensor (IS) side. In the present disclosure, the surface of the lens may include a paraxial region (or chief region) around a point intersecting the optical axis (OI) and a marginal region around the paraxial region or spaced apart from the paraxial region. In the present disclosure, reference to the shape of a surface of a lens may be a description of the shape of the paraxial region of the surface of the lens. For example, even if one surface (the paraxial region of the surface) of a lens (e.g., the first lens (L1)) is described as having a convex shape, an edge portion of the surface of the lens may be concave. Similarly, even if one surface (the paraxial region of the surface) of a lens is described as having a concave shape, an edge portion of the surface of the lens may be convex.

[0102] In one embodiment, the first lens (L1) may be the lens closest to the subject (O) side (or the first lens from the subject side) and may have positive refractive power. In one embodiment, at least one of the subject-side surface (S2) or the image-side surface (S3) of the first lens (L1) may be formed as an aspherical surface. For example, the shape of the subject-side surface (S2) that is convex toward the subject (O) side may suppress an increase in spherical aberration due to a large diameter of the lenses (L1, L2, L3). In one embodiment, the first lens may be formed of a material including a synthetic resin (e.g., plastic). In addition, for example, since the first lens (L1) is formed of a material including a synthetic resin, the shape constraints of the remaining lenses (e.g., the third lens (L3)) including the second lens (L2) due to the first lens (L1) can be reduced compared to the case where the first lens (L1) is formed of a glass material, and a high degree of freedom can be secured in lens design. For example, since at least some of the plurality of lenses (L1, L2, L3) included in the lens assembly (300), including the first lens (L1), are formed of a material including a synthetic resin, the lens assembly (300) and the electronic device (e.g., the electronic device (101) of FIGS. 1 to 3) equipped with the assembly (300) can be lightweight. For example, at least a portion including an area (or a paraxial area) adjacent to the optical axis (OI) of the image-side surface (S3) of the first lens (L1) can be formed to be convex toward the image (I) side.

[0103] In one embodiment, the second lens (L2) may be a lens that is second adjacent to the subject (O) side (or second arranged from the subject (O) side) and may have negative refractive power. In one embodiment, the image-side surface (S5) of the second lens (L2) may be formed to be concave toward the image side. In one embodiment, at least one surface of the subject-side surface (S4) or the image-side surface (S5) of the second lens (L2) may be formed to be aspherical. For example, at least a portion including a region (or a paraxial region) adjacent to the optical axis (OI) of the subject-side surface (S4) of the second lens (L2) may be formed to be concave toward the subject (O).

[0104] In one embodiment, the third lens (L3) may be the lens that is third adjacent to the subject (O) side (or is arranged third from the subject (O) side) or closest to the image (I) side. In one embodiment, the subject-side surface (S6) of the third lens (L3) may be formed to be convex toward the subject side. In one embodiment, at least one of the subject-side surface (S6) or the image-side surface (S7) of the third lens (L3) may be formed to be aspherical. For example, the third lens (L3) may be formed to have positive refractive power or negative refractive power.

[0105] In one embodiment, at least one of the lenses (L1, L2, L3) and / or the image sensor (IS) may be configured to reciprocate along the optical axis (OI). According to one embodiment, an electronic device (e.g., the electronic device (101) of FIG. 1 and / or the electronic device (101) of FIGS. 3 and 4) or a processor (e.g., the processor (120) of FIG. 1) may be configured to focus or adjust a focal length by reciprocating the lenses (L1, L2, L3) and / or the image sensor (IS) along the optical axis (OI).

[0106] In one embodiment, an electronic device (e.g., the electronic device (101) of FIG. 1 and / or the electronic device (101) of FIGS. 3 and 4) or a processor (e.g., the processor (120) of FIG. 1) may be configured to perform a focus adjustment (e.g., auto focusing (AF)) operation by moving at least one of a plurality of lenses (L1, L2, L3) in a first direction in which the plurality of lenses (L1, L2, L3) are arranged. Here, the first direction may mean an imaginary axis (or axial direction) passing through the centers of the lenses (L1, L2, L3) when the lenses (L1, L2, L3) are stationary, and may be parallel to a portion of the optical axis (OI). According to one embodiment, an electronic device (e.g., the electronic device (101) of FIG. 1 and / or the electronic device (101) of FIGS. 3 and 4) or a processor (e.g., the processor (120) of FIG. 1) may be configured to perform an optical image stabilization (OIS) operation by moving at least one of the lenses (L1, L2, L3) in at least one direction (e.g., left-right direction and up-down direction) perpendicular to the first direction in which the plurality of lenses (L1, L2, L3) are arranged. According to one embodiment, when at least one of the lenses (L1, L2, L3) is moved in the first direction and / or at least one direction (e.g., left-right direction and up-down direction) perpendicular to the first direction, the image sensor (IS) and / or the reflective member (M) may be maintained in a stationary state. However, the components that are moved to perform focus adjustment (e.g., auto focus (AF)) operation and / or optical image stabilization (OIS) operation are not limited to the lenses (L1, L2, L3), and may also be performed by moving the image sensor (IS) and / or the reflective member (M).According to one embodiment, an electronic device (e.g., the electronic device (101) of FIG. 1 and / or the electronic device (101) of FIGS. 3 and 4) or a processor (e.g., the processor (120) of FIG. 1) may be configured to perform a focus adjustment (e.g., auto focus (AF)) operation by moving an image sensor (IS) and / or a reflective member (M) in a first direction in which the plurality of lenses (L1, L2, L3) are arranged and / or to perform an optical image stabilization (OIS) operation by moving the image sensor (IS) and / or the reflective member (M) in at least one direction (e.g., left-right direction and up-down direction) perpendicular to the first direction.

[0107] According to one embodiment, a reflective member (M) may be disposed between the lenses (L1, L2, L3) of the lens group and the image sensor (IS). For example, the reflective member (M) may include a subject-side surface (S8) and an image-side surface (S9). The reflective member (M) may be an optical member configured to refract and / or reflect light that has passed through the lenses (L1, L2, L3) of the lens group and is incident on the image sensor (IS). For example, a path of a chief ray of a light bundle that has passed through the reflective member (M) may be parallel to a chief ray incident on the lens assembly (300). According to one embodiment, the reflective member (M) may include at least one mirror and / or at least one prism configured to refract and / or reflect light. For example, the reflective member (M) may be configured to change a path of light at least once. According to one embodiment, a folded optical system (or folded camera) can be implemented by including a lens assembly (300) with a reflective member (M). For example, the lens assembly (300) can secure a focal length of the lens assembly (300) in a limited accommodation space as electronic devices (e.g., electronic devices (101) of FIGS. 3 and 4) are miniaturized and / or slimmed down by including the reflective member (M).

[0108] In one embodiment, the reflective member (M) may be configured to change the path of light transmitted from the lenses (L1, L2, L3) of the lens group once or twice.

[0109] Referring to FIG. 5, according to one embodiment, the reflective member (M) may be configured to change the path of light twice and may include a first reflective surface (M1) and a second reflective surface (M2). For example, the first reflective surface (M1) may be configured to reflect light transmitted from the lenses (L1, L2, L3) and transmit the light to the second reflective surface (M2). For example, the second reflective surface (M2) may be configured to reflect light transmitted from the first reflective surface (M1) and transmit the light to the image sensor (IS). According to one embodiment, the first reflective surface (M1) and the second reflective surface (M2) of the reflective member (M) may be included in at least one mirror and / or at least one prism. According to one embodiment, the reflective member (M) may be a single prism including the first reflective surface (M1) and the second reflective surface (M2). According to one embodiment, when the first reflective surface (M1) and / or the second reflective surface (M2) is configured to only reflect light without refracting it, the reflective surface may be replaced with a mirror. According to one embodiment, the reflective member (M) may include a first prism including the first reflective surface (M1) and a second prism including the second reflective surface (M2). For example, referring to FIG. 5, an angle (e.g., α in FIG. 5) formed between a plane (e.g., the second reflective surface (M2)) perpendicular to a principal ray of a light bundle incident on the reflective member (M) and the first reflective surface (M1) may be about 20 degrees to about 40 degrees or about 25 degrees to about 35 degrees.

[0110] Referring to FIG. 6, according to one embodiment, the reflective member (M) may be configured to change the path of light once and may include a first reflective surface (M1). For example, the first reflective surface (M1) may be configured to reflect light transmitted from the lenses (L1, L2, L3) and transmit the reflected light to the image sensor (IS). According to one embodiment, the reflective member (M) may be a single prism including the first reflective surface (M1). For example, when the first reflective surface (M1) is configured to only reflect light without refracting it, the reflective member (M) may be a mirror including the first reflective surface (M1). For example, referring to FIG. 6, the angle (e.g., α in FIG. 6) formed between the plane perpendicular to the principal ray of the light beam incident on the reflective member (M) and the first reflective surface (M1) may be about 35 degrees to about 55 degrees or about 40 degrees to about 50 degrees, for example, about 45 degrees.

[0111] For example, when a high-performance, large-sized image sensor (IS) is included, the image quality of an electronic device (e.g., the electronic device (101) of FIGS. 3 and 4) may be improved. For example, the maximum image height (MAX IH) of the image sensor (IS) of the present disclosure may have a size of about 3 mm to about 4 mm, or about 3.3 mm to about 3.7 mm (e.g., 3.575 mm). Here, the maximum image height (MAX IH) of the image sensor (IS) may mean the maximum value of half the diagonal length of the image sensor (IS). However, as the image sensor (IS) becomes larger, the corresponding lens assembly (300) may be difficult to mount on a slim electronic device (101). For example, the thickness of the electronic device may increase due to the length or width of the image sensor (IS). Accordingly, according to one embodiment, the lens assembly (300) can secure design freedom regarding the arrangement direction of the lenses (L1, L2, L3) or the arrangement direction of the image sensor (IS) by including at least one reflective member (M), and thus, even if the image sensor (IS) is enlarged, it can be easily mounted on a miniaturized and / or slim electronic device (101).

[0112] In one embodiment, the aperture (sto) is disposed on the subject (O) side of at least one lens of the lens group (e.g., the third lens (L3)) and can substantially define an area where light is incident on at least one lens of the lens group (e.g., the third lens (L3)). For example, at least one lens of the lens group (e.g., the third lens (L3)) is substantially disposed between the aperture (sto) and the image sensor (IS) and can focus light incident through the aperture (sto) and incident it on the image sensor (IS). In one embodiment, the aperture (sto) can be disposed around the third lens (L3) or on one surface of the third lens (L3). For example, it can be disposed adjacent to the subject-side surface (S6) of the third lens (L3) or implemented on the subject-side surface (S6) of the third lens (L3).

[0113] In one embodiment, the lens assembly (300) may further include an infrared cut filter (F). In one embodiment, the infrared cut filter (F) may include a subject-side surface (S10) and an upper-side surface (S11). For example, the ultraviolet cut filter (F) may block light (e.g., infrared) in a wavelength band that is not visible to the naked eye of a user but is detected by a film or an image sensor (IS). For example, in a lens assembly or electronic device (101) for detecting infrared, the infrared cut filter (F) may be replaced with a pass filter that transmits infrared and blocks visible light. For example, the infrared cut filter (F) may be aligned with a plurality of lenses (L1, L2, L3), an aperture (sto) and / or an image sensor (IS) of a lens group along an optical axis (OI).

[0114] The radius of curvature (or radius), thickness, effective focal length (EFL), back focal length (BFL), total track length (TTL) of the lens assembly (300, 400, 500, 600, 700, 800, 900) of the lenses (L1, L2, L3) of the present disclosure, or the image height (IH) of the image sensor (IS) may all have units of mm unless otherwise specified. In addition, the radius of curvature (or radius), effective focal length (EFL), TTL, SD, thickness, or image height (IH) of the image sensor (IS) of the lenses (L1, L2, L3) may be a distance measured along the optical axis (OI).

[0115] Hereinafter, [Conditional Expression 1] and [Conditional Expression 2] that the lens assembly (300) according to the embodiment of FIGS. 5 and 6 satisfies, and [Conditional Expression 3] to [Conditional Expression 5] that the lens assembly (300) can satisfy according to the embodiment will be described.

[0116] According to one embodiment, the lens assembly (400, 500, 600, 700, 800, 900) described below with reference to FIGS. 7a to 12d may satisfy the following [Conditional Expression 1] and [Conditional Expression 2]. According to one embodiment, the lens assembly (400, 500, 600, 700, 800, 900) described below with reference to FIGS. 7a to 12d may satisfy the following [Conditional Expression 3], [Conditional Expression 4], and / or [Conditional Expression 5].

[0117] According to one embodiment, the lens assembly (300) can satisfy the following [Conditional Expression 1].

[0118] [Condition 1]

[0119] 25 < L1 Abbe - L2 Abbe < 60

[0120] Here, L1 Abbe may be the Abbe number of the lens or the first lens (L1) that is closest to the subject (O) side among the plurality of lenses (L1, L2, L3) of the lens assembly (300) (or included in the lens group), and L2 Abbe may be the Abbe number of the lens or the second lens (L2) that is second closest to the subject (O) side among the plurality of lenses (L1, L2, L3) of the lens assembly (300) (or included in the lens group).

[0121] According to one embodiment, when L1 Abbe - L2 Abbe of [Conditional Expression 1] is about 25 or less, it may be difficult to minimize the chromatic aberration of the lens assembly (300). When L1 Abbe - L2 Abbe of [Conditional Expression 1] is about 60 or more, it may be difficult to minimize the chromatic aberration of the lens assembly (300), and the image quality of the image (or image and / or video) acquired using the lens assembly (300) may deteriorate.

[0122] According to one embodiment, the lens assembly (300) can satisfy the following [Conditional Expression 2].

[0123] [Condition 2]

[0124] L3 Abbe < 21

[0125] Here, L3 Abbe may be the Abbe number of the lens closest to the upper (I) side or the third lens (L3) among the plurality of lenses (L1, L2, L3) of the lens assembly (300) (or included in the lens group).

[0126] According to one embodiment, when L3 Abbe of [Conditional Expression 2] is about 21 or more, spherical aberration by wavelength of light may increase in the center or paraxial region of the lenses (L1, L2, L3), and chromatic aberration may increase in the peripheral region of the lenses (L1, L2, L3), resulting in a deterioration in image quality. In order to resolve this deterioration in image quality, if the number of lenses is increased, it may be difficult to miniaturize the lens assembly (300).

[0127] It may be difficult to minimize chromatic aberration of the lens assembly (300), the field curvature from the paraxial region to the edge region of the image plane (img) of the image sensor (IS) may increase, and the image quality of images and / or videos acquired using the lens assembly (300) may deteriorate.

[0128] According to one embodiment, the lens assembly (300) can satisfy the following [Conditional Expression 3].

[0129] [Condition 3]

[0130] 1.15 < OTTL / BFL < 1.71

[0131] Here, OTTL (optical total length from image plane) is the subject optical total length, which may be the distance from the vertex of the subject-side surface (S2) of the lens closest to the subject (O) side or the first lens (L1) to the image sensor (IS), and BFL (back focal length) is the back focal length, which may be the distance from the vertex of the image-side surface (S7) of the lens closest to the image (I) side or the third lens (L3) to the image plane (img) of the image sensor (IS).

[0132] According to one embodiment, when the OTTL / BFL of [Conditional Expression 3] is about 1.15 or less, the manufacturing sensitivity may increase during the manufacturing and assembly of the lens. When the OTTL / BFL of [Conditional Expression 3] is about 1.71 or more, the overall size of the lens assembly (300) may increase, which may go against the demand for miniaturization and lightweighting of the lens assembly (300) and / or the demand for miniaturization and lightweighting of the electronic device (101) on which the lens assembly (300) is mounted.

[0133] According to one embodiment, the lens assembly (300) can satisfy the following [Conditional Expression 4].

[0134] [Condition 4]

[0135] 0.8 < EFL / L3 EFL < 2.16

[0136] Here, EFL (effective focal length) may be the effective focal length or total focal length of the lens assembly (300).

[0137] According to one embodiment, when the EFL / L3 EFL of [Conditional Expression 4] is about 0.8 or less, the overall size of the lens assembly (300) may increase, which may go against the demand for miniaturization and lightweighting of the lens assembly (300) and / or the demand for miniaturization and lightweighting of the electronic device (101) on which the lens assembly (300) is to be mounted. When the EFL / L3 EFL of [Conditional Expression 4] is about 2.16 or more, the sensitivity of spherical aberration of the lens assembly (300) may increase, making it difficult to manufacture the lens assembly (300).

[0138] According to one embodiment, the lens assembly (300) can satisfy the following [Conditional Expression 5].

[0139] [Condition 5]

[0140] -0.86 < L2 EFL / L1 EFL < -0.51

[0141] Here, L1 EFL may be the focal length of the lens closest to the subject (O) side or the first lens (L1), and L2 EFL may be the focal length of the lens second closest to the subject (O) side or the second lens (L2).

[0142] According to one embodiment, when L2 EFL / L1 EFL of [Conditional Expression 5] is less than or equal to about -0.86, the field curvature from the paraxial region to the edge region of the imaging plane (img) of the image sensor (IS) may increase, and manufacturing of the lens assembly (300) may become difficult. When L2 EFL / L1 EFL of [Conditional Expression 5] is greater than about -0.51, the overall size of the lens assembly (300) may increase, which may run counter to the demand for miniaturization and weight reduction of the lens assembly (300) and / or the demand for miniaturization and weight reduction of the electronic device (101) on which the lens assembly (300) is to be mounted.

[0143] The following [Table 1] is an embodiment that includes all of the configurations and characteristics of the lens assembly (300) described above with reference to FIGS. 5 and 6, and shows numerical values ​​for [Conditional Expressions 1] to [Conditional Expressions 5] of the lens assemblies (400, 500, 600, 700, 800, 900) according to [Examples 1] to [Examples 6] described below with reference to FIGS. 7a to 12d. Referring to [Table 1], it can be seen that the lens assemblies (400, 500, 600, 700, 800, 900) of [Examples 1] to [Examples 6] satisfy the above-described [Conditional Expressions 1] to [Conditional Expressions 5].

[0144] L2 Abbe - L1 AbbeOTTL / BFLEFL / L3 EFLL2 EFL / L1 EFLL3 Abbe Field of view Example 130.171.441.13-0.7218.1523.1 Example 230.171.351.75-0.6319.2422.7 Example 330.171.511.25-0.718.1522.5 Example 430.171.361.11-0.7218.1523.1 Example 530.171.351.00-0.7617.9823.2 Example 655.671.381.96-0.6118.1523.0

[0145] [Example 1]

[0146] FIG. 7A is a schematic diagram illustrating a lens assembly according to an embodiment of the present disclosure. FIG. 7B is a graph illustrating spherical aberration of the lens assembly of FIG. 7A according to an embodiment of the present disclosure. FIG. 7C is a graph illustrating astigmatism of the lens assembly of FIG. 7A according to an embodiment of the present disclosure. FIG. 7D is a graph illustrating distortion aberration of the lens assembly of FIG. 7A according to an embodiment of the present disclosure.

[0147] In one embodiment, the configuration of the lens assembly (400) may be at least partially identical or similar to the configuration of the lens assembly (300) described above with reference to FIGS. 5 and 6, and may be manufactured to satisfy [Conditional Expression 1] and [Conditional Expression 2] described above, and to have the specifications exemplified in the following [Table 2]. According to one embodiment, the configuration of the lens assembly (400) may satisfy [Conditional Expression 3], [Conditional Expression 4], and / or [Conditional Expression 5] described above with reference to FIGS. 5 and 6.

[0148] In one embodiment, the lens assembly (400) of FIG. 7a may include all of the configurations and characteristics of the lens assembly (300) described above with reference to FIGS. 5 and 6. For example, the description of the lenses (L1, L2, L3), the reflective member (M), the image sensor (IS), the aperture (sto), and the filter (F) of the lens assembly (300) described above with reference to FIGS. 5 and 6 may be equally applied to the lens assembly (400) of FIG. 7a, and the description thereof may be omitted below. The arrangement relationship of the reflective member (M) and the image sensor (IS) with respect to the lenses (L1, L2, L3) of the lens assembly (300) described above with reference to FIGS. 5 and 6 may be applied to the lens assembly (400) of FIG. 7a.

[0149] In one embodiment, the lens assembly (400) can be manufactured with the specifications exemplified in [Table 2] below and can have the aspheric coefficients of [Table 3]. In [Table 2], lens surface 1 can exemplify a gap between the first lens (L1) and the subject (O), and the measured value of the thickness can be the distance of the gap or the air gap.

[0150] A lens assembly (400) implemented with the specifications of [Table 2] below may be a telephoto lens having an angle of view (FOV) of about 14.61 degrees. In addition, the lens assembly (300) implemented with the specifications of [Table 2] below may have an effective focal length (EFL) of about 17 mm, an F-number (Fno) of about 2.843, an optical total length (OTTL; optical total length from image plane) of about 18.774 mm, a maximum image height (Max IH; max image height) of an image sensor (IS) of about 3.575 mm, and a total angle of view (FOV) of about 23.1 degrees.

[0151] Lens surface radius of curvature thickness H-Ape effective focal length (EFL) refractive index (nd) Abbe number (vd) objinfinityinfinity1infinity0.000003.328282*4.821212.500003.100006.4211.5441056.113*-10.529380.572832.750044*-10.585291.101782.38023-4.6221.6144425.945*4.085700.162832.100006*(sto)4.290031.4 33391.9000015.0431.6804218.157*6.320912.000001.856498infinity10.000002.18114infinity1.5594939.289infinity0 .500003.3943610infinity0.210003.49019infinity1.5168064.1711infinity0.273653.51642imginfinity0.020003.57580

[0152] [Table 3] below lists the aspherical coefficients of the lenses (L1, L2, L3), and the aspherical coefficients can be calculated using the following [Mathematical Formula 1].

[0153]

[0154] Here, 'z' represents the distance (sag) from the vertex of the lens in the direction of the optical axis (OI), 'c' represents the reciprocal of the radius of curvature at the vertex of the lens, 'y' represents the distance in the direction perpendicular to the optical axis, 'K' represents the Conic constant, and 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', and 'O' represent aspheric coefficients, respectively.

[0155] 렌즈 면(surface)S2S3S4S5S6S7곡률 반경(radius)4.82121E+00-1.05294E+01-1.05853E+014.08570E+004.29003E+006.32091E+00K'(Conic)-3.07804E-01-1.00000E+00-2.43238E+01-2.83625E-01-3.26617E+00-1.00000E+00A(4th) / C41.49527E-04-7.56908E-04-1.06755E-02-3.69782E-02-1.97788E-024.61336E-03B(6th) / C58.42442E-052.47832E-031.22471E-023.87464E-022.66765E-02-3.56669E-03C(8th) / C6-1.28377E-04-8.99485E-04-6.23858E-03-1.24588E-02-1.70961E-021.00655E-02D(10th) / C71.39548E-042.26130E-041.95276E-03-2.29041E-027.44404E-03-1.67187E-02E(12th) / C8-9.07657E-05-8.65006E-05-3.87243E-045.15627E-02-2.83217E-031.76140E-02F(14th) / C93.91825E-054.85978E-054.75514E-05-6.11378E-021.03979E-03-1.28012E-02G(16th) / C10-1.18020E-05-2.16790E-05-3.30655E-064.93326E-02-3.09956E-046.66317E-03H(18th) / C112.53393E-066.79606E-069.97169E-08-2.82606E-026.25200E-05-2.52171E-03J(20th) / C12-3.89812E-07-1.50481E-060.00000E+001.15931E-02-7.61628E-066.94502E-04K(22th) / C134.26169E-082.35141E-070.00000E+00-3.38200E-034.90792E-07-1.37590E-04L(24th) / C14-3.23096E-09-2.53765E-080.00000E+006.85022E-04-1.22462E-081.90828E-05M(26th) / C1 51.61437E-101.79862E-090.00000E+00-9.15664E-050.00000E+00-1.75726E-06N(28th) / C16-4.78040E-12-7.52790E-110.00000E+007.26242E-060.00000E+009.64481E-08O(30th) / C176.35442E-141.40906E-120.00000E+00-2.58818E-070.00000E+00-2.38607E-09.

[0156] FIG. 7B is a graph showing spherical aberration of the lens assembly (400) of FIG. 7A according to one embodiment of the present disclosure, in which the horizontal axis represents a coefficient of longitudinal spherical aberration, the vertical axis represents a normalized distance from the optical axis (OI), and shows a change in longitudinal spherical aberration according to the wavelength of light. The longitudinal spherical aberration is shown for light having wavelengths of, for example, 656.3000 (NM, nanometer), 587.6000 (NM), 546.1000 (NM), 486.1000 (NM), and 435.8000 (NM), respectively. FIG. 7c is a graph showing astigmatic field curves for light having a wavelength of 546.1000 (NM) of a lens assembly (400) according to one embodiment of the present disclosure, where 'X' exemplifies a sagittal plane and 'Y' exemplifies a tangential plane or meridional plane. FIG. 7d is a graph showing distortion for light having a wavelength of 546.1000 (NM) of a lens assembly (400) according to one embodiment of the present disclosure.

[0157] [Example 2]

[0158] FIG. 8A is a schematic diagram illustrating a lens assembly according to an embodiment of the present disclosure. FIG. 8B is a graph illustrating spherical aberration of the lens assembly of FIG. 8A according to an embodiment of the present disclosure. FIG. 8C is a graph illustrating astigmatism of the lens assembly of FIG. 8A according to an embodiment of the present disclosure. FIG. 8D is a graph illustrating distortion aberration of the lens assembly of FIG. 8A according to an embodiment of the present disclosure.

[0159] In one embodiment, the configuration of the lens assembly (500) may be at least partially identical or similar to the configuration of the lens assembly (300) described above with reference to FIGS. 5 and 6, and may satisfy [Conditional Expression 1] and [Conditional Expression 2] described above. According to one embodiment, the configuration of the lens assembly (500) may satisfy [Conditional Expression 3], [Conditional Expression 4], and / or [Conditional Expression 5] described above with reference to FIGS. 5 and 6.

[0160] In one embodiment, the lens assembly (500) of FIG. 8A may include all of the configurations and characteristics of the lens assembly (300) described above with reference to FIGS. 5 and 6. For example, the description of the lenses (L1, L2, L3), the reflective member (M), the image sensor (IS), the aperture (sto), and the filter (F) of the lens assembly (300) described above with reference to FIGS. 5 and 6 may be equally applied to the lens assembly (500) of FIG. 8A, and the description thereof may be omitted below. The arrangement relationship of the reflective member (M) and the image sensor (IS) with respect to the lenses (L1, L2, L3) of the lens assembly (300) described above with reference to FIGS. 5 and 6 may be applied to the lens assembly (500) of FIG. 8A.

[0161] In one embodiment, the lens assembly (500) can be manufactured with the specifications exemplified in [Table 4] below and can have the aspheric coefficients of [Table 5]. In [Table 4], lens surface 1 can exemplify a gap between the first lens (L1) and the subject (O), and the measured value of the thickness can be the distance of the gap or the air gap.

[0162] A lens assembly (500) implemented with the specifications of [Table 4] below may have an effective focal length (EFL) of about 17.5 mm, an F number (Fno) of about 2.829, an optical total length from image plane (OTTL) of about 19.195 mm, a maximum image height (Max IH) of an image sensor (IS) of about 3.575 mm, and a total field of view (FOV) of about 22.7 degrees.

[0163] Lens surface radius of curvature thickness H-Ape effective focal length (EFL) refractive index (nd) Abbe number (vd) object (O) infinity infinity 1 infinity 0.00000 3.428032*4.90 1002.444693.20000 5.9701.5441056.113*-8.040380.719323.20000 6*(sto)-5.906720.683112.46322-3.7341.6144425.945*3.976030.561372.099086*13.659270. 600442.1000010.0201.6707419.247*-13.311180.355482.155668infinity6.000002.21852infinity1.7346245.69infinity 7.000002.6343110infinity0.210003.48173infinity1.5168064.1711infinity0.620283.49840imginfinity0.000003.57646

[0164] [Table 5] below describes the aspherical coefficients of the lenses (L1, L2, L3). The aspherical coefficients can be calculated using the above-described [Mathematical Formula 1] with reference to [Table 3].

[0165] 렌즈 면(surface)S2S3S4S5S6S7곡률 반경(radius)4.90100E+00-8.04038E+00-5.90672E+003.97603E+001.36593E+01-1.33112E+01K'(Conic)-4.32608E-01-1.00000E+00-1.12191E+01-2.30671E-01-2.77292E+01-1.00000E+00A(4th) / C45.76501E-06-2.94743E-03-2.62822E-02-2.24975E-023.91016E-035.95175E-03B(6th) / C5-6.60522E-045.03325E-032.75225E-02-9.35267E-04-5.55886E-032.33936E-03C(8th) / C69.93567E-04-2.22001E-03-1.20499E-025.76968E-02-9.96048E-04-2.02859E-02D(10th) / C7-7.69872E-047.70209E-041.57723E-03-1.19170E-011.02843E-023.94319E-02E(12th) / C83.91507E-04-2.47225E-041.06046E-031.49845E-01-1.18622E-02-4.49591E-02F(14th) / C9-1.37931E-046.62511E-05-7.11333E-04-1.31384E-017.09023E-033.48653E-02G(16th) / C103.45206E-05-1.28592E-052.24643E-048.26440E-02-2.59173E-03-1.94740E-02H(18th) / C11-6.21928E-061.62861E-06-4.51248E-05-3.76333E-026.03401E-048.00509E-03J(20th) / C128.08788E-07-1.13473E-076.10655E-061.24095E-02-8.78541E-05-2.42524E-03K(22th) / C13-7.52237E-081.01455E-09-5.52314E-07-2.93342E-037.32832E-065.34240E-04L(24th) / C144.87849E-095.08420E-103.15277E-084.84581E-04-2.68424E-07-8.30541E-05M(26th) / C1 5-2.09473E-10-3.94485E-11-9.90379E-10-5.31255E-050.00000E+008.62113E-06N(28th ) / C165.34971E-121.06700E-121.18597E-113.47331E-060.00000E+00-5.35394E-07O(30th) / C17-6.14911E-14-4.64030E-150.00000E+00-1.02505E-070.00000E+001.50268E-08.

[0166] FIG. 8b is a graph showing spherical aberration of a lens assembly (500) according to one embodiment of the present disclosure, in which the horizontal axis represents a coefficient of longitudinal spherical aberration, the vertical axis represents a normalized distance from the optical axis (OI), and shows a change in longitudinal spherical aberration according to the wavelength of light. The longitudinal spherical aberration is shown for light having wavelengths of, for example, 656.3000 (NM, nanometer), 587.6000 (NM), 546.1000 (NM), 486.1000 (NM), and 435.8000 (NM), respectively. FIG. 8c is a graph showing astigmatic field curves for light having a wavelength of 546.1000 (NM) of a lens assembly (500) according to one embodiment of the present disclosure, where 'X' exemplifies a sagittal plane and 'Y' exemplifies a tangential plane or meridional plane. FIG. 8d is a graph showing distortion for light having a wavelength of 546.1000 (NM) of a lens assembly (500) according to one embodiment of the present disclosure.

[0167] [Example 3]

[0168] FIG. 9A is a schematic diagram illustrating a lens assembly according to an embodiment of the present disclosure. FIG. 9B is a graph illustrating spherical aberration of the lens assembly of FIG. 9A according to an embodiment of the present disclosure. FIG. 9C is a graph illustrating astigmatism of the lens assembly of FIG. 9A according to an embodiment of the present disclosure. FIG. 9D is a graph illustrating distortion aberration of the lens assembly of FIG. 9A according to an embodiment of the present disclosure.

[0169] In one embodiment, the configuration of the lens assembly (600) may be at least partially identical or similar to the configuration of the lens assembly (300) described above with reference to FIGS. 5 and 6, and may satisfy [Conditional Expression 1] and [Conditional Expression 2] described above. According to one embodiment, the configuration of the lens assembly (600) may satisfy [Conditional Expression 3], [Conditional Expression 4], and / or [Conditional Expression 5] described above with reference to FIGS. 5 and 6.

[0170] In one embodiment, the lens assembly (600) of FIG. 9A may include all of the configurations and characteristics of the lens assembly (300) described above with reference to FIGS. 5 and 6. For example, the description of the lenses (L1, L2, L3), the reflective member (M), the image sensor (IS), the aperture (sto), and the filter (F) of the lens assembly (300) described above with reference to FIGS. 5 and 6 may be equally applied to the lens assembly (600) of FIG. 9A, and the description thereof may be omitted below. The arrangement relationship of the reflective member (M) and the image sensor (IS) with respect to the lenses (L1, L2, L3) of the lens assembly (300) described above with reference to FIGS. 5 and 6 may be applied to the lens assembly (600) of FIG. 9A.

[0171] In one embodiment, the lens assembly (600) can be manufactured with the specifications exemplified in [Table 6] below and can have the aspheric coefficients of [Table 7]. In [Table 6], lens surface 1 can exemplify a gap between the first lens (L1) and the subject (O), and the measured value of the thickness can be the distance of the gap or the air gap.

[0172] A lens assembly (600) implemented with the specifications of [Table 6] below may have an effective focal length (EFL) of about 17.487 mm, an F number (Fno) of about 2.943, an optical total length from image plane (OTTL) of about 18.088 mm, a maximum image height (Max IH) of an image sensor (IS) of about 3.575 mm, and a total field of view (FOV) of about 22.5 degrees.

[0173] Lens surface radius of curvature thickness H-Ape effective focal length (EFL) refractive index (nd) Abbe number (vd) object (O) infinity infinity 1 infinity 0.00000 3.32 2052 * 4.78 502 2.65 3193.10000 6.49 31.54 4105 6.113 * -11.0 39 58 0.43 0 37 2.68 7574 * -11.0 47 0 5 1.16 549 2.42 110 - 4.56 21.61 44 42 5.945 * 3.95 575 0.39 148 2.10000 6 * (sto) 4.18 4771 .450711.9000014.0071.6804218.157*6.342622.000001.854408infinity6.000002.16805infinity1.5940030.29infinity3 .000002.8519210infinity0.210003.40417infinity1.5168064.1711infinity0.766793.42938imginfinity0.020003.57626

[0174] [Table 7] below describes the aspherical coefficients of the lenses (L1, L2, L3). The aspherical coefficients can be calculated using the above-described [Mathematical Formula 1] with reference to [Table 3].

[0175] 렌즈 면(surface)S2S3S4S5S6S7곡률 반경(radius)4.78502E+00-1.10396E+01-1.10471E+013.95575E+004.18477E+006.34262E+00K'(Conic)-3.24910E-01-1.00000E+00-2.34038E+01-2.92997E-01-3.15565E+00-1.00000E+00A(4th) / C43.17256E-05-2.06716E-03-1.13615E-02-2.45934E-02-8.75570E-033.35134E-03B(6th) / C54.19961E-044.57185E-031.23474E-022.14089E-029.59330E-03-5.71052E-03C(8th) / C6-5.03287E-04-2.86900E-03-5.89364E-03-8.97943E-03-4.81905E-031.47838E-02D(10th) / C73.96721E-041.88969E-031.72017E-03-2.16136E-031.76497E-03-2.20216E-02E(12th) / C8-2.09754E-04-1.22404E-03-3.18100E-049.44674E-03-6.66786E-042.15882E-02F(14th) / C97.78618E-056.25294E-043.64664E-05-1.22613E-022.61953E-04-1.48491E-02G(16th) / C10-2.08563E-05-2.34346E-04-2.36911E-061.04166E-02-7.41442E-057.36571E-03H(18th) / C114.08025E-066.38675E-056.67839E-08-6.19762E-031.15575E-05-2.66012E-03J(20th) / C12-5.82990E-07-1.26318E-050.00000E+002.61771E-03-5.93343E-076.97776E-04K(22th) / C136.01110E-081.79369E-060.00000E+00-7.82168E-04-5.86806E-08-1.31133E-04L(24th) / C14-4.35113E-09-1.78128E-070.00000E+001.61849E-046.34644E-091.71595E-05M(26th) / C1 52.09619E-101.17398E-080.00000E+00-2.20856E-050.00000E+00-1.48178E-06N(28th) / C16-6.03183E-12-4.61146E-100.00000E+001.78907E-060.00000E+007.57916E-08O(30th) / C177.84014E-148.16833E-120.00000E+00-6.51988E-080.00000E+00-1.73724E-09.

[0176] FIG. 9b is a graph showing spherical aberration of a lens assembly (600) according to one embodiment of the present disclosure, in which the horizontal axis represents a coefficient of longitudinal spherical aberration, the vertical axis represents a normalized distance from an optical axis (OI), and shows a change in longitudinal spherical aberration according to a wavelength of light. The longitudinal spherical aberration is shown for light having wavelengths of, for example, 656.3000 (NM, nanometer), 587.6000 (NM), 546.1000 (NM), 486.1000 (NM), and 435.8000 (NM), respectively. FIG. 9c is a graph showing astigmatic field curves for light having a wavelength of 546.1000 (NM) of a lens assembly (600) according to one embodiment of the present disclosure, where 'X' exemplifies a sagittal plane and 'Y' exemplifies a tangential plane or meridional plane. FIG. 9d is a graph showing distortion for light having a wavelength of 546.1000 (NM) of a lens assembly (600) according to one embodiment of the present disclosure.

[0177] [Example 4]

[0178] FIG. 10A is a schematic diagram illustrating a lens assembly according to an embodiment of the present disclosure. FIG. 10B is a graph illustrating spherical aberration of the lens assembly of FIG. 10A according to an embodiment of the present disclosure. FIG. 10C is a graph illustrating astigmatism of the lens assembly of FIG. 10A according to an embodiment of the present disclosure. FIG. 10D is a graph illustrating distortion aberration of the lens assembly of FIG. 10A according to an embodiment of the present disclosure.

[0179] In one embodiment, the configuration of the lens assembly (700) may be at least partially identical or similar to the configuration of the lens assembly (300) described above with reference to FIGS. 5 and 6, and may satisfy [Conditional Expression 1] and [Conditional Expression 2] described above. According to one embodiment, the configuration of the lens assembly (700) may satisfy [Conditional Expression 3], [Conditional Expression 4], and / or [Conditional Expression 5] described above with reference to FIGS. 5 and 6.

[0180] In one embodiment, the lens assembly (700) of FIG. 10A may include all of the configurations and characteristics of the lens assembly (300) described above with reference to FIGS. 5 and 6. For example, the description of the lenses (L1, L2, L3), the reflective member (M), the image sensor (IS), the aperture (sto), and the filter (F) of the lens assembly (300) described above with reference to FIGS. 5 and 6 may be equally applied to the lens assembly (700) of FIG. 10A, and the description may be omitted below. The arrangement relationship of the reflective member (M) and the image sensor (IS) with respect to the lenses (L1, L2, L3) of the lens assembly (300) described above with reference to FIGS. 5 and 6 may be applied to the lens assembly (700) of FIG. 10A.

[0181] In one embodiment, the lens assembly (700) can be manufactured with the specifications exemplified in [Table 8] and can have the aspherical coefficients exemplified in [Table 9]. In [Table 8], lens surface 1 can exemplify a gap between the first lens (L1) and the subject (O), and the measured value of the thickness can be the distance of the gap or the air gap.

[0182] A lens assembly (700) implemented with the specifications of [Table 8] below may have an effective focal length (EFL) of about 17 mm, an F number (Fno) of about 2.742, an optical total length from image plane (OTTL) of about 18.604 mm, a maximum image height (Max IH) of an image sensor (IS) of about 3.575 mm, and a total field of view (FOV) of about 23.1 degrees.

[0183] Lens surface radius of curvature thickness H-Ape effective focal length (EFL) refractive index (nd) Abbe number (vd) object (O) infinity infinity 1 infinity 0.00000 3.340 252*4.64 182 2.50000 3.10000 6.04 91.544 105 6.113*-9.300 85 0.665 203.10000 4*-8.26 247 0.60000 2.39 194-4.38 5 1.61 444 25.945*4.164 96 0.116 5 22.10000 6*(sto) 4.21 642 1.0 00002.0000015.2561.6804218.157*6.358342.000001.929888infinity10.000002.20840infinity1.5841832.999infinity1 .000003.2870610infinity0.210003.45994infinity1.5168064.1711infinity0.492473.48364imginfinity0.020003.57623

[0184] [Table 9] below describes the aspherical coefficients of the lenses (L1, L2, L3). The aspherical coefficients can be calculated using the above-described [Mathematical Formula 1] with reference to [Table 3].

[0185] 렌즈 면(surface)S2S3S4S5S6S7곡률 반경(radius)4.64182E+00-9.30085E+00-8.26247E+004.16496E+004.21642E+006.35834E+00K'(Conic)-2.91863E-01-1.00000E+00-2.97421E+013.35444E-01-1.41454E+00-1.00000E+00A(4th) / C42.37598E-041.99054E-03-1.13873E-02-6.69864E-031.27567E-021.59072E-02B(6th) / C5-1.83259E-042.94719E-046.05317E-03-3.43954E-02-3.75698E-02-1.60170E-02C(8th) / C62.75246E-041.30983E-031.02141E-029.63876E-027.22358E-023.27328E-02D(10th) / C7-2.17309E-04-1.52693E-03-1.73203E-02-1.27519E-01-7.98939E-02-5.03160E-02E(12th) / C81.18136E-049.39748E-041.33850E-021.13313E-015.54432E-025.37529E-02F(14th) / C9-4.54985E-05-3.99673E-04-6.54872E-03-7.88634E-02-2.52509E-02-4.09500E-02G(16th) / C101.25474E-051.26367E-042.20364E-034.61891E-027.66696E-032.27741E-02H(18th) / C11-2.49432E-06-3.02084E-05-5.24538E-04-2.24323E-02-1.53740E-03-9.35934E-03J(20th) / C123.57617E-075.41744E-068.85201E-058.52331E-031.95382E-042.84101E-03K(22th) / C13-3.66332E-08-7.13127E-07-1.03873E-05-2.39442E-03-1.42411E-05-6.28171E-04L(24th) / C142.61578E-096.65083E-088.07479E-074.73103E-044.52856E-079.81147E-05M(26th) / C15-1.23738E -10-4.14470E-09-3.74348E-08-6.18024E-050.00000E+00-1.02251E-05N(28th) / C163 .48670E-121.54420E-107.84233E-104.78026E-060.00000E+006.35760E-07O(30th) / C17-4.43195E-14-2.59699E-120.00000E+00-1.65627E-070.00000E+00-1.77783E-08.

[0186] FIG. 10b is a graph showing spherical aberration of a lens assembly (700) according to one embodiment of the present disclosure, in which the horizontal axis represents a coefficient of longitudinal spherical aberration, the vertical axis represents a normalized distance from an optical axis (OI), and shows a change in longitudinal spherical aberration according to a wavelength of light. The longitudinal spherical aberration is shown for light having wavelengths of, for example, 656.3000 (NM, nanometer), 587.6000 (NM), 546.1000 (NM), 486.1000 (NM), and 435.8000 (NM), respectively. FIG. 10c is a graph showing astigmatic field curves for light having a wavelength of 546.1000 (NM) of a lens assembly (700) according to one embodiment of the present disclosure, where 'X' exemplifies a sagittal plane and 'Y' exemplifies a tangential plane or meridional plane. FIG. 10d is a graph showing distortion for light having a wavelength of 546.1000 (NM) of a lens assembly (700) according to one embodiment of the present disclosure.

[0187] [Example 5]

[0188] FIG. 11A is a schematic diagram illustrating a lens assembly according to an embodiment of the present disclosure. FIG. 11B is a graph illustrating spherical aberration of the lens assembly of FIG. 11A according to an embodiment of the present disclosure. FIG. 11C is a graph illustrating astigmatism of the lens assembly of FIG. 11A according to an embodiment of the present disclosure.

[0189] In one embodiment, the configuration of the lens assembly (800) may be at least partially identical or similar to the configuration of the lens assembly (300) described above with reference to FIGS. 5 and 6, and may satisfy [Conditional Expression 1] and [Conditional Expression 2] described above. According to one embodiment, the configuration of the lens assembly (800) may satisfy [Conditional Expression 3], [Conditional Expression 4], and / or [Conditional Expression 5] described above with reference to FIGS. 5 and 6.

[0190] In one embodiment, the lens assembly (800) of FIG. 11A may include all of the configurations and characteristics of the lens assembly (300) described above with reference to FIGS. 5 and 6. For example, the description of the lenses (L1, L2, L3), the reflective member (M), the image sensor (IS), the aperture (sto), and the filter (F) of the lens assembly (300) described above with reference to FIGS. 5 and 6 may be equally applied to the lens assembly (800) of FIG. 11A, and the description thereof may be omitted below. The arrangement relationship of the reflective member (M) and the image sensor (IS) with respect to the lenses (L1, L2, L3) of the lens assembly (300) described above with reference to FIGS. 5 and 6 may be applied to the lens assembly (800) of FIG. 11A.

[0191] In one embodiment, the lens assembly (800) can be manufactured with the specifications exemplified in [Table 10] below and can have the aspheric coefficients of [Table 11]. In [Table 10], lens surface 1 can exemplify a gap between the first lens (L1) and the subject (O), and the measured value of the thickness can be the distance of the gap or the air gap.

[0192] A lens assembly (800) implemented with the specifications of [Table 10] below may have an effective focal length (EFL) of about 17 mm, an F number (Fno) of about 2.853, an optical total length from image plane (OTTL) of about 18.890 mm, a maximum image height (Max IH) of an image sensor (IS) of about 3.575 mm, and a total field of view (FOV) of about 23.2 degrees.

[0193] Lens surface radius of curvature thickness H-Ape effective focal length (EFL) refractive index (nd) Abbe number (vd) object (O) infinity infinity 1 infinity 0.00000 3.32 110 2*4.93 73 8 2.50000 3.10000 6.20 8 1.54 4 10 5 6.113 *-8.90 172 0.66 5 20 3.10000 4*-7.66 99 8 0.60000 2.34 00 7 -4.73 9 1.61 44 4 25.94 5*4.90 57 30.116 5 22.10000 6*(sto) 5.36 5 11.0 00002.0000017.0001.9459317.987*7.271102.000001.893508infinity10.000002.17640infinity1.5751836.159infinity1 .000003.2435410infinity0.210003.41349infinity1.5168064.1711infinity0.777823.43680imginfinity0.020003.57661

[0194] [Table 11] below describes the aspherical coefficients of the lenses (L1, L2, L3). The aspherical coefficients can be calculated using the above-described [Mathematical Formula 1] with reference to [Table 3].

[0195] 렌즈 면(surface)S2S3S4S5S6S7곡률 반경(radius)4.93738E+00-8.90172E+00-7.66998E+004.90573E+005.36551E+007.27110E+00K'(Conic)-3.33394E-01-1.00000E+00-2.78184E+012.64297E-01-1.41451E+00-1.00000E+00A(4th) / C42.32990E-042.51565E-03-1.29880E-02-1.76982E-023.19912E-031.20939E-02B(6th) / C5-2.42958E-04-2.74959E-041.27866E-021.24164E-022.82834E-04-6.19766E-03C(8th) / C62.74375E-041.78631E-03-2.18425E-031.64143E-025.40851E-031.20752E-02D(10th) / C7-1.73237E-04-1.76078E-03-4.18944E-03-5.03501E-02-1.07972E-02-2.12988E-02E(12th) / C87.57227E-059.63722E-044.24654E-036.81279E-029.49132E-032.56578E-02F(14th) / C9-2.37200E-05-3.52297E-04-2.08647E-03-6.35306E-02-4.83655E-03-2.14753E-02G(16th) / C105.32613E-069.17548E-056.26688E-044.40926E-021.54702E-031.28801E-02H(18th) / C11-8.44493E-07-1.75304E-05-1.17363E-04-2.28450E-02-3.15634E-04-5.63231E-03J(20th) / C129.15723E-082.48567E-061.23010E-058.70228E-033.99100E-051.80054E-03K(22th) / C13-6.33522E-09-2.60913E-07-3.12536E-07-2.38580E-03-2.84929E-06-4.15870E-04L(24th) / C142.28795E-101.98835E-08-8.37090E-084.56221E-048.76995E-086.74151E-05M(26th) / C158.25450E -14-1.04967E-099.86075E-09-5.76445E-050.00000E+00-7.25474E-06N(28th) / C16-3 .17234E-133.45873E-11-3.53166E-104.32141E-060.00000E+004.63913E-07O(30th) / C178.09304E-15-5.38405E-130.00000E+00-1.45498E-070.00000E+00-1.32988E-08.

[0196] FIG. 11B is a graph showing spherical aberration of a lens assembly (800) according to one embodiment of the present disclosure, in which the horizontal axis represents a coefficient of longitudinal spherical aberration, the vertical axis represents a normalized distance from an optical axis (OI), and shows a change in longitudinal spherical aberration according to a wavelength of light. The longitudinal spherical aberration is shown for light having wavelengths of, for example, 656.3000 (NM, nanometer), 587.6000 (NM), 546.1000 (NM), 486.1000 (NM), and 435.8000 (NM), respectively. FIG. 11c is a graph showing astigmatic field curves for light having a wavelength of 546.1000 (NM) of a lens assembly (800) according to one embodiment of the present disclosure, where 'X' exemplifies a sagittal plane and 'Y' exemplifies a tangential plane or meridional plane. FIG. 11d is a graph showing distortion for light having a wavelength of 546.1000 (NM) of a lens assembly (800) according to one embodiment of the present disclosure.

[0197] [Example 6]

[0198] FIG. 12A is a schematic diagram illustrating a lens assembly according to an embodiment of the present disclosure. FIG. 12B is a graph illustrating spherical aberration of the lens assembly of FIG. 12A according to an embodiment of the present disclosure. FIG. 12C is a graph illustrating astigmatism of the lens assembly of FIG. 12A according to an embodiment of the present disclosure. FIG. 12D is a graph illustrating distortion aberration of the lens assembly of FIG. 12A according to an embodiment of the present disclosure.

[0199] In one embodiment, the configuration of the lens assembly (900) may be at least partially identical or similar to the configuration of the lens assembly (300) described above with reference to FIGS. 5 and 6, and may satisfy [Conditional Expression 1] and [Conditional Expression 2] described above. According to one embodiment, the configuration of the lens assembly (900) may satisfy [Conditional Expression 3], [Conditional Expression 4], and / or [Conditional Expression 5] described above with reference to FIGS. 5 and 6.

[0200] In one embodiment, the lens assembly (900) can be manufactured with the specifications exemplified in [Table 12] below and can have the aspheric coefficients of [Table 13]. In [Table 12], lens surface 1 can exemplify a gap between the first lens (L1) and the subject (O), and the measured value of the thickness can be the distance of the gap or the air gap.

[0201] In one embodiment, the lens assembly (900) of FIG. 12A may include all of the configurations and characteristics of the lens assembly (300) described above with reference to FIGS. 5 and 6. For example, the description of the lenses (L1, L2, L3), the reflective member (M), the image sensor (IS), the aperture (sto), and the filter (F) of the lens assembly (300) described above with reference to FIGS. 5 and 6 may be equally applied to the lens assembly (900) of FIG. 12A, and the description thereof may be omitted below. The arrangement relationship of the reflective member (M) and the image sensor (IS) with respect to the lenses (L1, L2, L3) of the lens assembly (300) described above with reference to FIGS. 5 and 6 may be applied to the lens assembly (900) of FIG. 12A.

[0202] A lens assembly (900) implemented with the specifications of [Table 12] below may have an effective focal length (EFL) of about 17.065 mm, an F-number (Fno) of about 2.942, an optical total length from image plane (OTTL) of about 18.470 mm, a maximum image height (Max IH) of an image sensor (IS) of about 3.575 mm, and a total field of view (FOV) of about 23.0 degrees.

[0203] Lens surface radius of curvature thickness H-Ape effective focal length (EFL) refractive index (nd) Abbe number (vd) object (O) infinity infinity 1 infinity 0.00000 3.11 100 2*4.60 6 17 2.50000 2.90000 6.74 2 1.49 700 8 1.61 3*-10.18 300.78 31 9 3.10000 4*-9.04 11 40.40 44 9 2.18 7 12-4.08 7 1.61 44 42 5.945 *3.58 1400.03 0000 2.10000 6*(sto) 3.09 60 7 1. 373452.000008.7261.6804218.157*5.226672.000001.867328infinity10.000002.15592infinity1.5499150.639infinity0 .500003.3324210infinity0.210003.42465infinity1.5168064.1711infinity0.648593.44992imginfinity0.020003.57613

[0204]

[0205] [Table 13] below describes the aspherical coefficients of the lenses (L1, L2, L3). The aspherical coefficients can be calculated using the above-described [Mathematical Formula 1] with reference to [Table 2].

[0206] 렌즈 면(surface)S2S3S4S5S6S7곡률 반경(radius)4.60617E+00-1.01833E+01-9.04114E+003.58140E+003.09607E+005.22667E+00K'(Conic)-2.45417E-01-1.00000E+00-3.99297E+013.68003E-01-1.20292E+00-1.00000E+00A(4th) / C4-2.56880E-044.24009E-03-7.39266E-038.29967E-041.59868E-021.03462E-02B(6th) / C51.65828E-03-7.45858E-03-1.66538E-02-9.72415E-02-8.10318E-021.18685E-02C(8th) / C6-2.67429E-031.29747E-026.55034E-022.36662E-011.79618E-01-4.57724E-02D(10th) / C72.59511E-03-1.28124E-02-8.92118E-02-2.61745E-01-2.10894E-018.82675E-02E(12th) / C8-1.64171E-038.55549E-037.27172E-021.49048E-011.51462E-01-1.09700E-01F(14th) / C97.16958E-04-4.11644E-03-4.00898E-02-2.56975E-02-7.07929E-029.35840E-02G(16th) / C10-2.23130E-041.46262E-031.56561E-02-2.53451E-022.20394E-02-5.63910E-02H(18th) / C115.02529E-05-3.86453E-04-4.39991E-032.32942E-02-4.54243E-032.43066E-02J(20th) / C12-8.21117E-067.56122E-058.86410E-04-1.01959E-025.95670E-04-7.49868E-03K(22th) / C139.63617E-07-1.07923E-05-1.25064E-042.83511E-03-4.50042E-051.63637E-03L(24th) / C14-7.91181E-081.09093E-061.17412E-05-5.25970E-041.49044E-06-2.45678E-04M(26th) / C1 54.31272E-09-7.39376E-08-6.58901E-076.36332E-050.00000E+002.40464E-05N(28th) / C16-1.40160E-103.01226E-091.67224E-08-4.56938E-060.00000E+00-1.37607E-06O(30th) / C172.05479E-12-5.57485E-110.00000E+001.48252E-070.00000E+003.47886E-08.

[0207] FIG. 12B is a graph showing spherical aberration of a lens assembly (900) according to one embodiment of the present disclosure, in which the horizontal axis represents a coefficient of longitudinal spherical aberration, the vertical axis represents a normalized distance from an optical axis (OI), and shows a change in longitudinal spherical aberration according to a wavelength of light. The longitudinal spherical aberration is shown for light having wavelengths of, for example, 656.3000 (NM, nanometer), 587.6000 (NM), 546.1000 (NM), 486.1000 (NM), and 435.8000 (NM), respectively. FIG. 12c is a graph showing astigmatic field curves for light having a wavelength of 546.1000 (NM) of a lens assembly (900) according to one embodiment of the present disclosure, where 'X' exemplifies a sagittal plane and 'Y' exemplifies a tangential plane or meridional plane. FIG. 12d is a graph showing distortion for light having a wavelength of 546.1000 (NM) of a lens assembly (900) according to one embodiment of the present disclosure.

[0208] A lens assembly (or optical system) comprising multiple lenses can be applied to camera modules for various electronic devices (e.g., smartphones, tablet PCs, smartwatches, drones). Typically, optical systems exhibit aberrations due to the shape of the lenses, and these aberrations need to be minimized to ensure good optical performance.

[0209] A lens assembly for implementing a telephoto lens can be implemented as a folded optical system including a reflective member (e.g., a prism and / or a mirror) configured to reflect the path of light passing through a lens group at least once. Such a folded optical system can be designed, for example, by arranging two reflective members front and rear and arranging a lens group consisting of a plurality of lenses between the two reflective members, or alternatively, by arranging the reflective member between the lens group and the image sensor. In the former case, since the lens group is arranged between two reflective members, there may be limitations in increasing the size of the lenses and the size of the folded optical system, the alignment of the light path may be difficult, and it may be difficult to manufacture an optical system with a low F-number. On the other hand, in the latter case, lenses of a relatively large size can be arranged compared to the former, making it relatively easy to implement an optical system with a low F-number. In addition, the latter case may be easier to align the light path than the former. Additionally, in the latter case, it may be easier to adjust the size of the curved optical system than in the former case.

[0210] A lens assembly (300, 400, 500, 600, 700, 800, 900) according to one embodiment of the present disclosure may include three lenses (L1, L2, L3) and a reflective member (M) that reflects and / or refracts light transmitted through the lens group. A lens assembly (300, 400, 500, 600, 700, 800, 900) according to one embodiment of the present disclosure may be a curved optical system for implementing a telephoto lens. For example, the lens assembly (300, 400, 500, 600, 700, 800, 900) can secure a large back focal length (BFL) and a telephoto ratio in relation to the space by changing the path of light reaching the image sensor (IS) at least once using a reflective member (M), thereby contributing to miniaturization and lightweighting of the size of the lens assembly and the electronic device (e.g., the electronic device (101) of FIGS. 1, 3, and 4) on which the assembly is to be mounted. For example, by including such a reflective member (M), the arrangement direction of the image forming surface (img) of the image sensor (IS) can be designed in various ways with respect to the arrangement of the lenses (L1, L2, L3). Accordingly, an optical system (or an imaging device or a camera module) with high optical performance (e.g., telephoto performance) can be implemented in a miniaturized and lightweight electronic device (101) such as a smart phone. A lens assembly according to one embodiment of the present disclosure can provide high-resolution images while providing good telephoto performance by suppressing or minimizing chromatic aberration caused by a reflective member (M) through a combination of refractive power, shape, and material of the lenses.

[0211] The technical tasks to be achieved from the disclosure of this document are not limited to the technical tasks mentioned above, and other technical tasks not mentioned will be clearly understood by a person having ordinary skill in the technical field of the present disclosure from the description of this document.

[0212] The effects that can be obtained from the disclosure of this document are not limited to the effects mentioned above, and other effects that are not mentioned can be clearly understood by a person having ordinary skill in the technical field to which this document belongs from the description of this document.

[0213] According to one embodiment of the present disclosure, an electronic device (101) may be provided. The electronic device may include a lens assembly. The lens assembly may include a lens group including a plurality of lenses aligned along a portion of an optical axis in a direction from a subject side toward an image side, an image sensor including an image-forming surface on which an image is formed, and a reflective member disposed between the lens group and the image sensor, the reflective member configured to change a path of light passing through the lens group once or twice. A first lens closest to a subject side among the plurality of lenses may include a synthetic resin and have positive refractive power, and a subject-side surface of the first lens may be formed to be convex toward the subject side. Among the plurality of lenses, the second lens, which is secondarily adjacent to the subject side, has negative refractive power, and the image-side surface of the second lens is formed to be concave toward the image side, and at least one of the subject-side surface or the image-side surface of the second lens may be formed as an aspherical surface. Among the plurality of lenses, the lens closest to the image side may have the subject-side surface formed to be convex toward the subject side, and at least one of the subject-side surface or the image-side surface of the lens closest to the image side may be formed as an aspherical surface. The lens assembly may satisfy the following [Conditional Expression 1] and [Conditional Expression 2]:

[0214] [Condition 1]

[0215] 25 < L1 Abbe - L2 Abbe < 60

[0216] [Condition 2]

[0217] L3 Abbe < 21

[0218] (Here, L1 Abbe of [Conditional Expression 1] is the Abbe number of the first lens (L1), L2 Abbe is the Abbe number of the second lens (L2), and L3 Abbe of [Conditional Expression 2] is the Abbe number of the lens (L3) closest to the image side among the plurality of lenses).

[0219] In one embodiment, at least one of the plurality of lenses of the lens group may be configured to move in a first direction in which the plurality of lenses are aligned to perform a focus adjustment operation and / or to move in at least one direction perpendicular to the first direction to perform an image stabilization operation. In one embodiment, when at least one of the plurality of lenses is moved to perform the focus adjustment operation and / or the image stabilization operation, the image sensor and the reflective member may be maintained in a fixed state.

[0220] In one embodiment, the image sensor may be configured such that the plurality of lenses move in a first direction in which the plurality of lenses are aligned to perform a focus adjustment operation and / or move in at least one direction perpendicular to the first direction to perform a shake correction operation. In one embodiment, when the image sensor is moved to perform the focus adjustment operation and / or the shake correction operation, the plurality of lenses of the lens group may be maintained in a fixed state.

[0221] According to one embodiment, the lens assembly can satisfy the following [Conditional Expression 3].

[0222] [Condition 3]

[0223] 1.15 < OTTL / BFL < 1.71

[0224] (Here, OTTL is the distance from the vertex of the subject-side surface of the first lens to the image sensor, and BFL is the distance from the vertex of the image-side surface of the lens (L3) closest to the image side to the imaging plane of the image sensor).

[0225] According to one embodiment, the lens assembly can satisfy the following [Conditional Expression 4].

[0226] [Condition 4]

[0227] 0.8 < EFL / L3 EFL < 2.16

[0228] (Here, EFL is the effective focal length of the lens assembly, and L3 EFL is the focal length of the lens (L3) closest to the upper side).

[0229] In one embodiment, the reflective member may include a prism configured to reflect the path of light passing through the lens group twice and transmit it to the image sensor.

[0230] In one embodiment, the prism may have a cross-section parallel to the optical axis that is triangular.

[0231] In one embodiment, the reflective member may include one or two mirrors.

[0232] According to one embodiment, the lens assembly can satisfy the following [Conditional Expression 5].

[0233] [Condition 5]

[0234] -0.86 < L2 EFL / L1 EFL < -0.51

[0235] (Here, L1 EFL is the focal length of the first lens, and L2 EFL is the focal length of the second lens).

[0236] In one embodiment, the lens (L3) closest to the upper side may be a third lens thirdly adjacent to the subject side.

[0237] In one embodiment, the lens assembly may further include an aperture (sto) positioned closer to the subject-side surface of the third lens.

[0238] According to one embodiment, the imaging surface of the image sensor may be arranged to be inclined with respect to the first direction in which the plurality of lenses are arranged.

[0239] According to one embodiment, at least a portion of the upper surface of the first lens, including a portion adjacent to the optical axis, may be formed to be convex toward the upper side.

[0240] According to one embodiment, at least a portion of the subject-side surface of the second lens, including a portion adjacent to the optical axis, may be formed concave toward the subject.

[0241] In addition, various other embodiments are possible.

[0242] According to one embodiment of the present disclosure, an electronic device (101) may be provided. The electronic device may include a lens assembly (400; 500; 600; 700; 800; 900). The lens assembly may include a lens group including a plurality of lenses aligned along a portion of an optical axis (OI) in a direction from an object (O) side toward an image (I) side, an image sensor (IS) including an imaging surface (img) on ​​which an image (I) is formed, and a reflective member (M) disposed between the lens group and the image sensor, the reflective member being configured to change a path of light passing through the lens group once or twice. A first lens (L1) closest to the object side among the plurality of lenses may include a synthetic resin and have positive refractive power, and a subject-side surface (S2) of the first lens may be formed to be convex toward the object side. Among the plurality of lenses, the second lens (L2) that is secondarily adjacent to the subject side has negative refractive power, and the image-side surface (S5) of the second lens is formed to be concave toward the image side, and at least one of the subject-side surface (S4) or the image-side surface (S5) of the second lens may be formed as an aspherical surface. Among the plurality of lenses, the lens (L3) that is closest to the image side may have the subject-side surface (S6) formed to be convex toward the subject side, and at least one of the subject-side surface (S6) or the image-side surface (S7) of the lens (L3) that is closest to the image side may be formed as an aspherical surface. The lens assembly may satisfy the following [Conditional Expression 1] and [Conditional Expression 2].

[0243] [Condition 1]

[0244] 25 < L1 Abbe - L2 Abbe < 60

[0245] [Condition 2]

[0246] L3 Abbe < 21

[0247] (Here, L1 Abbe of [Conditional Expression 1] is the Abbe number of the first lens (L1), L2 Abbe is the Abbe number of the second lens (L2), and L3 Abbe of [Conditional Expression 2] is the Abbe number of the lens (L3) closest to the image side among the plurality of lenses.)

[0248] In one embodiment, the image sensor and / or one or more lenses included in the lens group (or at least one of the plurality of lenses) may be configured to move in a first direction in which the plurality of lenses of the lens group are aligned to perform a focus adjustment operation or to move in at least one direction perpendicular to the first direction to perform a shake correction operation. In one embodiment, when the image sensor is moved to perform the focus adjustment operation and / or the shake correction operation, the plurality of lenses of the lens group may be maintained in a fixed state. In one embodiment, when at least one of the plurality of lenses is moved to perform the focus adjustment operation and / or the shake correction operation, the image sensor and the reflective member may be maintained in a fixed state.

[0249] According to one embodiment, the following [Conditional Expression 3] can be satisfied.

[0250] [Condition 3]

[0251] 1.15 < OTTL / BFL < 1.71

[0252] (Here, OTTL is the distance from the vertex of the subject-side surface of the first lens to the image sensor, and BFL is the distance from the vertex of the image-side surface of the third lens to the imaging plane of the image sensor).

[0253] According to one embodiment, the following [Conditional Expression 4] can be satisfied.

[0254] [Condition 4]

[0255] 0.8 < EFL / L3 EFL < 2.16

[0256] (Here, EFL is the effective focal length of the lens assembly, and L3 EFL is the focal length of the third lens).

[0257] According to one embodiment, the reflective member may include a prism having a triangular cross-section parallel to the optical axis and configured to reflect the path of light passing through the lens group twice and transmit it to the image sensor.

[0258] According to one embodiment, the following [Conditional Expression 5] can be satisfied.

[0259] [Condition 5]

[0260] -0.86 < L2 EFL / L1 EFL < -0.51

[0261] (Here, L1 EFL is the focal length of the first lens, and L2 EFL is the focal length of the second lens).

[0262] In addition, various other embodiments are possible.

[0263] The present disclosure should be understood as an example and not as a limitation of the present disclosure. It will be apparent to those skilled in the art that various changes in form and detail may be made without departing from the overall scope of the present disclosure, including the appended claims and their equivalents.

[0264] Electronic devices according to embodiments of the present disclosure may take various forms. Electronic devices may include, for example, portable communication devices (e.g., smartphones), computer devices, portable multimedia devices, portable medical devices, cameras, wearable devices, or home appliances. Electronic devices according to embodiments of the present disclosure are not limited to the aforementioned devices.

[0265] It should be understood that the embodiments of this document and the terminology used herein are not intended to limit the technical features described in this document to a specific embodiment, but include various modifications, equivalents, or substitutes of the embodiment. In connection with the description of the drawings, similar reference numerals may be used for similar or related components. The singular form of a noun corresponding to an item may include one or more of the item, unless the context clearly indicates otherwise. In this disclosure, each of the phrases "A or B," "at least one of A and B," "at least one of A or B," "A, B, or C," "at least one of A, B, and C," and "at least one of A, B, or C" can include any one of the items listed together in the corresponding phrase among the phrases, or all possible combinations thereof. Terms such as "first," "second," or "first" or "second" may be used merely to distinguish one component from another, and do not limit the components in any other respect (e.g., importance or order). When a component (e.g., a first component) is referred to as "coupled" or "connected" to another component (e.g., a second component), with or without the terms "functionally" or "communicatively," it means that the component can be connected to the other component directly (e.g., wired), wirelessly, or through a third component.

[0266] The term "module" used in one embodiment of this document may include a unit implemented in hardware, software, or firmware, and may be used interchangeably with terms such as logic, logic block, component, or circuit. A module may be an integral component, or a minimum unit or part of such a component that performs one or more functions. For example, according to one embodiment, a module may be implemented in the form of an application-specific integrated circuit (ASIC).

[0267] An embodiment of the present document may be implemented as software (e.g., a program (140)) including one or more instructions stored in a storage medium (e.g., an internal memory (136) or an external memory (138)) readable by a machine (e.g., an electronic device (101)). For example, a processor (e.g., a processor (120)) of the machine (e.g., an electronic device (101)) may call at least one instruction among the one or more instructions stored from the storage medium and execute it. This enables the machine to operate to perform at least one function according to the at least one called instruction. The one or more instructions may include code generated by a compiler or code executable by an interpreter. The machine-readable storage medium may be provided in the form of a non-transitory storage medium. Here, 'non-transitory' simply means that the storage medium is a tangible device and does not contain signals (e.g., electromagnetic waves), and the term does not distinguish between cases where data is stored semi-permanently or temporarily on the storage medium.

[0268] According to one embodiment, the method according to one embodiment of the present disclosure may be provided as a computer program product. The computer program product may be traded between sellers and buyers as a product. The computer program product may be distributed in the form of a device-readable storage medium (e.g., compact disc read-only memory (CD-ROM)) or may be provided through an application store (e.g., Play Store). TM ) or directly between two user devices (e.g., smart phones), online distribution (e.g., downloading or uploading). In the case of online distribution, at least a portion of the computer program product may be at least temporarily stored or temporarily created in a machine-readable storage medium, such as the memory of a manufacturer's server, an application store's server, or an intermediary server.

[0269] According to one embodiment, each component (e.g., a module or a program) of the above-described components may include one or more entities, and some of the entities may be separated and placed in other components. According to one embodiment, one or more components or operations of the aforementioned components may be omitted, or one or more other components or operations may be added. Alternatively or additionally, a plurality of components (e.g., a module or a program) may be integrated into a single component. In this case, the integrated component may perform one or more functions of each of the plurality of components identically or similarly to those performed by the corresponding component among the plurality of components prior to the integration. According to one embodiment, the operations performed by a module, program, or other component may be executed sequentially, in parallel, iteratively, or heuristically, or one or more of the operations may be executed in a different order, omitted, or one or more other operations may be added.

Claims

1. In an electronic device (101) including a lens assembly, The above lens assembly (400; 500; 600; 700; 800; 900) A lens group including a plurality of lenses aligned along an optical axis (OI) in a direction from the object (O) side toward the image (I) side; An image sensor (IS) including an image plane (img) on ​​which an image (I) is formed; and A reflective member (M) disposed between the lens group and the image sensor, comprising a reflective member configured to change the path of light passing through the lens group once or twice, Among the plurality of lenses, the first lens (L1) closest to the subject side includes synthetic resin and has positive refractive power, and the subject-side surface (S2) of the first lens is formed convexly toward the subject side. Among the plurality of lenses, the second lens (L2) which is secondarily adjacent to the subject side has negative refractive power, the image-side surface (S5) of the second lens is formed concave toward the image side, and at least one of the subject-side surface (S4) or the image-side surface (S5) of the second lens is formed as an aspherical surface. Among the plurality of lenses, the lens (L3) closest to the upper side has a subject-side surface (S6) formed convexly toward the subject side, and at least one of the subject-side surface (S6) or the image-side surface (S7) of the lens (L3) closest to the upper side is formed as an aspherical surface. The above lens assembly is an electronic device satisfying the following [Conditional Expression 1] and [Conditional Expression 2]. [Condition 1] 25 < L1 Abbe - L2 Abbe < 60 [Condition 2] L3 Abbe < 21 (Here, L1 Abbe of [Conditional Expression 1] is the Abbe number of the first lens (L1), L2 Abbe is the Abbe number of the second lens (L2), and L3 Abbe of [Conditional Expression 2] is the Abbe number of the lens (L3) closest to the image side among the plurality of lenses).

2. In paragraph 1, An electronic device, wherein at least one of the plurality of lenses of the lens group is configured to perform a focus adjustment operation by moving in a first direction in which the plurality of lenses are aligned, or to perform a shake correction operation by moving in at least one direction perpendicular to the first direction.

3. In paragraph 1 or 2, An electronic device wherein the image sensor is configured to perform a focus adjustment operation by moving in a first direction in which the plurality of lenses are aligned, or to perform a shake correction operation by moving in at least one direction perpendicular to the first direction.

4. In any one of paragraphs 1 to 3, The above lens assembly is an electronic device satisfying the following [Conditional Expression 3] [Condition 3] 1.15 < OTTL / BFL < 1.71 (Here, OTTL is the distance from the vertex of the subject-side surface of the first lens to the image sensor, and BFL is the distance from the vertex of the image-side surface of the lens (L3) closest to the image side to the imaging plane of the image sensor).

5. In any one of paragraphs 1 to 4, The above lens assembly is an electronic device satisfying the following [conditional expression 4] [Condition 4] 0.8 < EFL / L3 EFL < 2.16 (Here, EFL is the effective focal length of the lens assembly, and L3 EFL is the focal length of the lens (L3) closest to the upper side).

6. In any one of paragraphs 1 to 5, An electronic device, wherein the reflective member includes a prism configured to reflect the path of light passing through the lens group twice and transmit it to the image sensor.

7. In paragraph 6, An electronic device wherein the prism has a cross section parallel to the optical axis that is triangular.

8. In any one of paragraphs 1 to 7, An electronic device, wherein the reflective member comprises one or two reflective surfaces (M1; M2).

9. In any one of paragraphs 1 to 8, The above lens assembly is an electronic device satisfying the following [Conditional Expression 5] [Condition 5] -0.86 < L2 EFL / L1 EFL < -0.51 (Here, L1 EFL is the focal length of the first lens, and L2 EFL is the focal length of the second lens).

10. In any one of paragraphs 1 to 9, An electronic device wherein the lens (L3) closest to the upper side is the third lens thirdly adjacent to the subject side.

11. In clause 10, An electronic device wherein the lens assembly further includes an aperture (sto) positioned closer to the subject side of the third lens.

12. In any one of paragraphs 1 to 11, An electronic device in which the imaging surface of the image sensor is arranged to be inclined with respect to the first direction in which the plurality of lenses are arranged.

13. In any one of paragraphs 1 to 12, An electronic device, wherein at least a portion of the upper side surface of the first lens, including a portion adjacent to the optical axis, is formed to be convex toward the upper side.

14. In any one of paragraphs 1 to 13, An electronic device, wherein at least a portion of the subject-side surface of the second lens, including a portion adjacent to the optical axis, is formed concavely toward the subject.

15. In the lens assembly (400; 500; 600; 700; 800; 900), A lens group including a plurality of lenses aligned along an optical axis (OI) in a direction from the object (O) side toward the image (I) side; An image sensor (IS) including an image plane (img) on ​​which an image (I) is formed; and A reflective member (M) disposed between the lens group and the image sensor, comprising a reflective member configured to change the path of light passing through the lens group once or twice, Among the plurality of lenses, the first lens (L1) closest to the subject side includes synthetic resin and has positive refractive power, and the subject-side surface (S2) of the first lens is formed convexly toward the subject side. Among the plurality of lenses, the second lens (L2) which is secondarily adjacent to the subject side has negative refractive power, the image-side surface (S5) of the second lens is formed concave toward the image side, and at least one of the subject-side surface (S4) or the image-side surface (S5) of the second lens is formed as an aspherical surface. Among the plurality of lenses, the third lens (L3) which is the third lens adjacent from the subject side has a subject-side surface (S6) formed convexly toward the subject side, and at least one of the subject-side surface (S6) or the image-side surface (S7) of the third lens (L3) is formed as an aspherical surface. A lens assembly satisfying [Condition 1] and [Condition 2] below. [Condition 1] 25 < L1 Abbe - L2 Abbe < 60 [Condition 2] L3 Abbe < 21 (Here, L1 Abbe of [Conditional Expression 1] is the Abbe number of the first lens (L1), L2 Abbe is the Abbe number of the second lens (L2), and L3 Abbe of [Conditional Expression 2] is the Abbe number of the third lens (L3))

Images