Optical system and electronic device including same

Abstract

According to one embodiment disclosed herein, an electronic device may be provided. The electronic device may comprise an optical system. The optical system may comprise: a plurality of lenses including a first lens and a second lens sequentially arranged along an optical axis in a direction from an object side toward an image side; an image sensor including an imaging surface on which an image is formed; and an optical member disposed between the plurality of lenses and the image sensor and configured to change, at least once, the path of light passing through the plurality of lenses. The optical system may satisfy [Equation 1] below. [Equation 1] 0.5 < OTTL / ImgH < 1.1 (OTTL is the distance from the apex of the object-side surface of the first lens to the apex of the image-side surface of the lens closest to the image side among the plurality of lenses, and ImgH is the effective image height of the image sensor).

Description

Optical system and electronic device including the same

[0001] The examples disclosed in this document relate to optical systems and electronic devices including the same.

[0002] Optical devices, such as cameras capable of capturing images or videos, have been widely used. While film-based optical devices were dominant in the past, recently, digital cameras and video cameras equipped with solid-state image sensors, such as CCD (charge coupled device) or CMOS (complementary metal-oxide semiconductor), have become widely popular. Optical devices employing solid-state image sensors (CCD or CMOS) are gradually replacing film-based optical devices because they make it easier to store, duplicate, and transfer images compared to film-based optical devices.

[0003] To acquire high-quality images and / or videos, an optical device may include an optical system (or optical system) composed of multiple lenses and an image sensor having a high pixel count. The optical system can acquire high-quality (high-resolution) images and / or videos by, for example, having a low F-number (Fno) and low aberration. To obtain a low F-number and low aberration—in other words, to obtain bright and high-resolution images—it is necessary to combine multiple lenses. The pixel count of an image sensor increases as it contains more pixels, and an image sensor with a higher pixel count can acquire high-resolution (high-resolution) images and / or videos. To implement a high-pixel image sensor within the limited mounting space of an electronic device, multiple very small pixels, for example, micrometer-sized pixels, may be arranged. Recently, image sensors containing tens of millions to hundreds of millions of micrometer-sized pixels are being installed in portable electronic devices such as smartphones and tablets. Such high-performance optical devices can have the effect of inducing users to purchase electronic devices.

[0004] The information described above may be provided as related art for the purpose of aiding understanding of the present disclosure. No claim or determination is made as to whether any of the foregoing may be applied 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 an optical system. The optical system may include a plurality of lenses, including a first lens and a second lens, sequentially arranged along an optical axis in a direction from the subject side toward the image side; an image sensor including an image plane on which an image is formed; and an optical member disposed between the plurality of lenses and the image sensor and configured to change the path of light passing through the plurality of lenses at least once. The optical system may satisfy the following [Equation 1].

[0006] [Equation 1]

[0007] 0.5 < OTTL / ImgH < 1.1

[0008] (Here, OTTL is the distance from the vertex of the subject-side surface of the first lens to the vertex of the image-side surface of the lens closest to the image side among the plurality of lenses, and ImgH is the effective image height of the image sensor).

[0009] According to one embodiment of the present disclosure, an optical system may be provided. The optical system may include a plurality of lenses sequentially arranged along an optical axis in a direction from the subject side toward the image side, comprising a first lens having a positive refractive power, a second lens having a positive refractive power, and a third lens having a negative refractive power; an image sensor comprising an image plane on which an image is formed; and an optical member disposed between the plurality of lenses and the image sensor and configured to change the path of light passing through the plurality of lenses at least once. The optical system may satisfy the following [Equation 1].

[0010] [Equation 1]

[0011] 0.5 < OTTL / ImgH < 1.1

[0012] (Here, OTTL is the distance from the vertex of the subject-side surface of the first lens to the vertex of the image-side surface of the lens closest to the image side among the plurality of lenses, and ImgH is the effective image height of the image sensor).

[0013] FIG. 1 is a block diagram of an electronic device in a network environment according to one embodiment of the present disclosure.

[0014] FIG. 2 is a block diagram illustrating a camera module according to one embodiment of the present disclosure.

[0015] FIG. 3 is a front perspective view of an electronic device according to one embodiment of the present disclosure.

[0016] FIG. 4 is a rear perspective view of an electronic device according to one embodiment of the present disclosure.

[0017] FIG. 5 is a schematic perspective view of an optical system according to one embodiment of the present disclosure.

[0018] FIG. 6 is a configuration diagram showing an optical system according to one embodiment of the present disclosure.

[0019] FIG. 7 is a configuration diagram showing an optical system according to one embodiment of the present disclosure.

[0020] FIG. 8a is a schematic diagram showing an optical system according to one embodiment of the present disclosure.

[0021] FIG. 8b is a graph showing the spherical aberration of the optical system of FIG. 8a according to one embodiment disclosed in this document.

[0022] FIG. 8c is a graph showing the astigmatism of the optical system of FIG. 8a according to one embodiment disclosed in this document.

[0023] FIG. 8d is a graph showing the distortion rate of the optical system of FIG. 8a according to one embodiment disclosed in this document.

[0024] FIG. 9a is a configuration diagram showing an optical system according to one embodiment of the present disclosure.

[0025] FIG. 9b is a graph showing the spherical aberration of the optical system of FIG. 9a according to one embodiment disclosed in this document.

[0026] FIG. 9c is a graph showing the astigmatism of the optical system of FIG. 9a according to one embodiment disclosed in this document.

[0027] FIG. 9d is a graph showing the distortion rate of the optical system of FIG. 9a according to one embodiment disclosed in this document.

[0028] FIG. 10a is a schematic diagram showing an optical system according to one embodiment of the present disclosure.

[0029] FIG. 10b is a graph showing the spherical aberration of the optical system of FIG. 10a according to one embodiment disclosed in this document.

[0030] FIG. 10c is a graph showing the astigmatism of the optical system of FIG. 10a according to one embodiment disclosed in this document.

[0031] FIG. 10d is a graph showing the distortion rate of the optical system of FIG. 10a according to one embodiment disclosed in this document.

[0032] FIG. 11a is a schematic diagram showing an optical system according to one embodiment of the present disclosure.

[0033] FIG. 11b is a graph showing the spherical aberration of the optical system of FIG. 11a according to one embodiment disclosed in this document.

[0034] FIG. 11c is a graph showing the astigmatism of the optical system of FIG. 11a according to one embodiment disclosed in this document.

[0035] FIG. 11d is a graph showing the distortion rate of the optical system of FIG. 11a according to one embodiment disclosed in this document.

[0036] FIG. 12a is a configuration diagram showing an optical system according to one embodiment of the present disclosure.

[0037] FIG. 12b is a graph showing the spherical aberration of the optical system of FIG. 12a according to one embodiment disclosed in this document.

[0038] FIG. 12c is a graph showing the astigmatism of the optical system of FIG. 12a according to one embodiment disclosed in this document.

[0039] FIG. 12d is a graph showing the distortion rate of the optical system of FIG. 12a according to one embodiment disclosed in this document.

[0040] FIG. 13a is a configuration diagram showing an optical system according to one embodiment of the present disclosure.

[0041] FIG. 13b is a graph showing the spherical aberration of the optical system of FIG. 13a according to one embodiment disclosed in this document.

[0042] FIG. 13c is a graph showing the astigmatism of the optical system of FIG. 13a according to one embodiment disclosed in this document.

[0043] FIG. 13d is a graph showing the distortion rate of the optical system of FIG. 13a according to one embodiment disclosed in this document.

[0044] Throughout the attached drawings, similar parts, configurations, and / or structures may be assigned similar reference numbers.

[0045] FIG. 1 is a block diagram of an electronic device (101) in a network environment (100) according to one embodiment disclosed in this document. Referring to FIG. 1, in the network environment (100), the electronic device (101) may communicate with an electronic device (102) through 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) through 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) through a server (108). According to one embodiment, the electronic device (101) may include a processor (120), memory (130), input module (150), sound output module (155), display module (160), audio module (170), sensor module (176), interface (177), connection terminal (178), haptic module (179), camera module (180), power management module (188), battery (189), communication module (190), subscriber identification module (196), or antenna module (197). In one embodiment, at least one of these components (e.g., connection terminal (178)) may be omitted from the electronic device (101), or one or more other components may be added. In one embodiment, some of these components (e.g., sensor module (176), camera module (180), or antenna module (197)) may be integrated into a single component (e.g., display module (160)).

[0046] The processor (120) can control at least one other component (e.g., hardware or software component) of the electronic device (101) connected to the processor (120) by executing software (e.g., program (140)), for example, and can perform various data processing or operations. According to one embodiment, as at least part of the data processing or operations, the processor (120) can store commands or data received from other components (e.g., sensor module (176) or communication module (190)) in volatile memory (132), process the commands or data stored in volatile memory (132), and store the resulting data in non-volatile memory (134). According to one embodiment, the processor (120) may include a main processor (121) (e.g., central processing unit or application processor) or an auxiliary processor (123) that can operate independently or together with it (e.g., graphics processing unit, neural processing unit (NPU), image signal processor, sensor hub processor, or communication processor). For example, if the electronic device (101) includes a main processor (121) and an auxiliary processor (123), the auxiliary processor (123) may be configured to use lower power than the main processor (121) or to be specialized for a designated function. The auxiliary processor (123) may be implemented separately from the main processor (121) or as part thereof.

[0047] The auxiliary processor (123) may control at least some of the functions or states associated with at least one component of the electronic device (101) (e.g., display module (160), sensor module (176), or communication module (190)) 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. According to one embodiment, the auxiliary processor (123) (e.g., image signal processor or communication processor) may be implemented as part of another functionally related component (e.g., camera module (180) or communication module (190)). According to one embodiment, the auxiliary processor (123) (e.g., neural network processing unit) may include a hardware structure specialized for processing an artificial intelligence model. The artificial intelligence model may be generated through machine learning. Such learning may be performed, for example, on the electronic device (101) itself where the artificial intelligence model is executed, or through a separate server (e.g., server (108)). The learning algorithm may 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 may include a plurality of artificial neural network layers.An artificial neural network may be a deep neural network (DNN), a convolutional neural network (CNN), a recurrent neural network (RNN), a restricted Boltzmann machine (RBM), a deep belief network (DBN), a bidirectional recurrent deep neural network (BRDNN), 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 the hardware structure, the artificial intelligence model may include a software structure, either additionally or substantially.

[0048] The memory (130) can store various data used by at least one component of the electronic device (101) (e.g., processor (120) or sensor module (176)). The data may include, for example, input data or output data for software (e.g., program (140)) and related commands. The memory (130) may include volatile memory (132) or non-volatile memory (134).

[0049] The program (140) may be stored as software in memory (130) and may include, for example, an operating system (142), middleware (144), or an application (146).

[0050] The input module (150) can receive commands or data to be used for a component of the electronic device (101) (e.g., processor (120)) from outside the electronic device (101) (e.g., user). The input module (150) may include, for example, a microphone, a mouse, a keyboard, a key (e.g., a button), or a digital pen (e.g., a stylus pen).

[0051] The sound output module (155) can output a sound signal to the outside of the electronic device (101). The sound output module (155) may include, for example, a speaker or a receiver. The speaker may be used for general purposes, such as multimedia playback or recording playback. The receiver may be used to receive incoming calls. According to one embodiment, the receiver may be implemented separately from the speaker or as part thereof.

[0052] The display module (160) can visually provide information to an external (e.g., 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 said device. According to one embodiment, the display module (160) may include a touch sensor configured to detect a touch, or a pressure sensor configured to measure the intensity of the force generated by said touch.

[0053] The audio module (170) can convert sound into an electrical signal or, conversely, convert an electrical signal into sound. According to one embodiment, the audio module (170) can acquire sound through the input module (150) or output sound through the sound output module (155) or an external electronic device (e.g., electronic device (102)) (e.g., speaker or headphones) that is directly or wirelessly connected to the electronic device (101).

[0054] The sensor module (176) can detect the operating state of the electronic device (101) (e.g., power or temperature) or the external environmental state (e.g., user state) and generate an electrical signal or data value corresponding to the detected state. According to one embodiment, the sensor module (176) may include, for example, a gesture sensor, a gyroscope sensor, a barometric pressure sensor, a magnetic sensor, an accelerometer sensor, a grip sensor, a proximity sensor, a color sensor, an IR (infrared) sensor, a biosensor, a temperature sensor, a humidity sensor, or an illuminance sensor.

[0055] The interface (177) may support one or more specified protocols that can be used for the electronic device (101) to be connected directly or wirelessly to an external electronic device (e.g., electronic device (102)). According to 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.

[0056] The connection terminal (178) may include a connector through which the electronic device (101) can 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).

[0057] The haptic module (179) can convert an electrical signal into a mechanical stimulus (e.g., vibration or movement) or an electrical stimulus that can be perceived by the user through tactile or kinesthetic senses. According to one embodiment, the haptic module (179) may include, for example, a motor, a piezoelectric element, or an electric stimulation device.

[0058] The camera module (180) can capture still images and video. According to one embodiment, the camera module (180) may include one or more lenses, image sensors, image signal processors, or flashes.

[0059] 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 part of a power management integrated circuit (PMIC).

[0060] The battery (189) can supply power to at least one component of the electronic device (101). According to one embodiment, the battery (189) may include, for example, a non-rechargeable primary battery, a rechargeable secondary battery, or a fuel cell.

[0061] The communication module (190) can support the establishment of a direct (e.g., wired) communication channel or a wireless communication channel between an 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 include one or more communication processors that operate independently of the processor (120) (e.g., application processor) and 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., cellular communication module, short-range wireless communication module, or GNSS (globjal navigation satellite system) communication module) or a wired communication module (194) (e.g., LAN (local area network) communication module, or power line communication module). The corresponding communication module among these communication modules can communicate with an external electronic device through a first network (198) (e.g., a short-range communication network such as Bluetooth, WiFi (wireless fidelity) direct, or IrDA (infrared data association)) or a second network (199) (e.g., 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 may 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 identify or authenticate the electronic device (101) within a communication network such as the first network (198) or the second network (199) using subscriber information (e.g., International Mobile Subscriber Identifier (IMSI)) stored in the subscriber identification module (196).

[0062] The wireless communication module (192) can support 5G networks and next-generation communication technologies following 4G networks, for example, new radio access technology. The NR access technology can support high-speed transmission of high-capacity data (enhanced mobile broadband eMBB), minimization of terminal power and connection of multiple terminals (massive machine type communications mMTC), or high reliability and low latency (ultra-reliable and low-latency communications URLLC). The wireless communication module (192) can support a high-frequency band (e.g., mmWave band) to achieve a high data transmission rate, for example. The wireless communication module (192) can support various technologies for securing performance in the high-frequency band, such as beamforming, massive MIMO (multiple-input and multiple-output), full-dimensional MIMO (FD-MIMO), array antenna, analog beam-forming, or large-scale antenna. The wireless communication module (192) can support various requirements specified by the electronic device (101), an external electronic device (e.g., electronic device (104)), or a network system (e.g., a second network (199)). According to one embodiment, the wireless communication module (192) may support a Peak data rate (e.g., 20 Gbps or more) for eMBB realization, loss coverage (e.g., 164 dB or less) for mMTC realization, or U-plane latency (e.g., downlink (DL) and uplink (UL) each 0.5 ms or less, or round trip 1 ms or less) for URLLC realization.

[0063] An antenna module (197) can transmit a signal or power to or from an external source (e.g., an external electronic device). According to one embodiment, the antenna module may include an antenna comprising a radiator made of a conductor or a conductive pattern formed on a substrate (e.g., a PCB). According to 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 a first network (198) or a second network (199), may be selected from the plurality of antennas, for example, by a communication module (190). The 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. According to one embodiment, in addition to the radiator, other components (e.g., a radio frequency integrated circuit (RFIC)) may be additionally formed as part of the antenna module (197).

[0064] According to one embodiment, the antenna module (197) may form a mmWave antenna module. According to one embodiment, the mmWave antenna module may include a printed circuit board, an RFIC disposed on or adjacent to a first surface (e.g., bottom surface) of the printed circuit board and capable of supporting a specified high frequency band (e.g., mmWave band), and a plurality of antennas (e.g., array antennas) disposed on or adjacent to a second surface (e.g., top surface or side surface) of the printed circuit board and capable of transmitting or receiving a signal of the specified high frequency band.

[0065] At least some of the above components can be connected to each other via a communication method between peripheral devices (e.g., bus, GPIO (general purpose input and output), SPI (serial peripheral interface), or MIPI (mobile industry processor interface)) and exchange signals (e.g., commands or data) with each other.

[0066] According to one embodiment, commands or data may be transmitted or received between the electronic device (101) and an external electronic device (104) through 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 performed on the electronic device (101) may be performed on one or more of the external electronic devices (102, 104 or 108). For example, if the electronic device (101) needs to perform a function or service automatically or in response to a request from a user or another device, the electronic device (101) may request one or more external electronic devices to perform at least part of the function or service instead of performing the function or service itself or additionally. One or more external electronic devices that receive the above request may execute at least part of the requested function or service, or 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 provide the result as is or additionally processed as at least part of the response to the request. For this purpose, for example, cloud computing, distributed computing, mobile edge computing (MEC), or client-server computing technology may be used. The electronic device (101) may provide ultra-low latency services using, for example, distributed computing or mobile edge computing. 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 neural networks. According to one embodiment, the external electronic device (104) or the server (108) may be included within 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.

[0067] 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) (e.g., an optical system), 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 an image sensor (230). The lens assembly (280) may collect light emitted from a subject that is the target of image capture. 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, F-number, or optical zoom), or at least one optical system may have one or more lens properties different from the lens properties of other optical systems. The lens assembly (280) may include, for example, a wide-angle lens or a telephoto lens.

[0068] A flash (220) may emit light used to enhance light emitted or reflected from a subject. According to one embodiment, the flash (220) may include one or more light-emitting diodes (e.g., RGB (red-green-blue) LED, white LED, infrared LED, or ultraviolet LED), or a xenon lamp. An image sensor (230) may acquire an image corresponding to the subject by converting light emitted or reflected from the subject and transmitted through a lens assembly (280) into an electrical signal. According to one embodiment, the image sensor (230) may include, for example, one image sensor selected from image sensors with different properties such as an RGB sensor, a BW (black and white) sensor, an IR sensor, or a UV sensor, a plurality of image sensors having the same properties, or a plurality of image sensors having different properties. Each image sensor included in the image sensor (230) may be implemented using, for example, a CCD (charged coupled device) sensor or a CMOS (complementary metal oxide semiconductor) sensor.

[0069] The image stabilizer (240) may move at least one lens or image sensor (230) included in the lens assembly (280) in a specific direction or control the operational characteristics of the image sensor (230) (e.g., adjusting read-out timing, etc.) in response to the movement of the camera module (290) or the electronic device (201) including the same. This allows for compensating for at least some of the negative effects caused by the movement on the captured image. According to one embodiment, the image stabilizer (240) may detect the movement of the camera module (290) or the electronic device (e.g., the electronic device (101) of FIG. 1) using a gyroscope sensor (not shown) or an accelerometer sensor (not shown) placed inside or outside the camera module (290). According to one embodiment, the image stabilizer (240) may be implemented as, for example, an optical image stabilizer. The memory (250) may temporarily store at least a portion of an image acquired through the image sensor (230) for the next image processing operation. For example, if image acquisition by the shutter is delayed or 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. Subsequently, when a specified condition is satisfied (e.g., user input or system command), at least a portion of the original image stored in the memory (250) may be acquired and processed by, for example, an image signal processor (260). According to one embodiment, the memory (250) may be configured as at least a portion of the memory (e.g., the memory (130) of FIG. 1) or as a separate memory that operates independently thereof.

[0070] The image signal processor (260) can perform one or more image processing operations on an image acquired through the image sensor (230) or an image stored in memory (250). The one or more image processing operations may include, for example, depth map generation, 3D modeling, panorama generation, feature point extraction, image synthesis, or image compensation (e.g., noise reduction, resolution adjustment, brightness adjustment, blurring, sharpening, or softing). Additionally or generally, the image signal processor (260) can perform control (e.g., exposure time control, or readout timing control, etc.) over 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 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)). According to one embodiment, the image signal processor (260) may be composed of at least part of a processor (e.g., processor (120) of FIG. 1) or may be composed of a separate processor that operates independently of the processor (120). If the image signal processor (260) is composed of 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).

[0071] 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 attributes or functions. In this case, for example, at least one of the plurality of camera modules (290) may be a wide-angle camera and at least another 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.

[0072] FIG. 3 is a front perspective view of an electronic device according to one embodiment disclosed in this document. FIG. 4 is a rear perspective view of an electronic device according to one embodiment disclosed in this document.

[0073] The configuration of the electronic device (101) of FIGS. 3 and 4 may be the same as, in whole or in part, the configuration of the electronic device (101) of FIG. 1.

[0074] Referring to FIGS. 3 and 4, an electronic device (101) according to one embodiment may include a housing (210) comprising a first surface (or front) (210A), a second surface (or rear) (210B), and a side (210C) surrounding the space between the first surface (210A) and the second surface (210B). In one embodiment (not shown), the housing (210) may refer to a structure forming some of the first surface (210A) of FIG. 2, the second surface (210B) of FIG. 3, and the side (210C). According to one embodiment, the first surface (210A) may be formed by a front plate (202) (e.g., a glass plate or a polymer plate having various coating layers) in which at least a portion is substantially transparent. The second surface (210B) may be formed by a rear plate (211) that is substantially opaque. The rear plate (211) may be formed, for example, by coated or colored glass, ceramic, polymer, metal (e.g., aluminum, stainless steel (STS), or magnesium), or a combination of at least two of the above materials. The side (210C) may be formed by a side structure (or "side bezel structure") (218) comprising metal and / or polymer, which is combined with the front plate (202) and the rear plate (211). In one embodiment, the rear plate (211) and the side structure (218) may be formed integrally and may comprise the same material (e.g., a metallic material such as aluminum).

[0075] Although not illustrated, the front plate (202) may include region(s) that are curved and seamlessly extended toward the rear plate (211) at least a portion of the edge. In one embodiment, the front plate (202) (or the rear plate (211)) may include only one of the regions that are curved and extended toward the rear plate (211) (or the front plate (202)) at one edge of the first surface (210A). According to the embodiment, the front plate (202) or the rear plate (211) may be substantially flat, in which case it may not include the curved and extended region. If it includes the curved and extended region, the thickness of the electronic device (101) in the portion containing the curved and extended region may be smaller than the thickness of the other portion.

[0076] 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 acoustic 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 additionally include other components.

[0077] According to one embodiment, the display (201) may be visually exposed, for example, through a significant 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 the side (210C). In one embodiment, the corners of the display (201) may be formed to be generally identical to the adjacent outer shape of the front plate (202). In one embodiment (not shown), in order to expand the area where 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 generally identical.

[0078] In one embodiment (not shown), a recess or opening is formed in a part of the 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 the 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 the back surface of the screen display area of ​​the display (201). In one embodiment (not shown), the display (201) may be combined with or 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 placed on the side (210C).

[0079] According to one embodiment, an audio module (not shown) may include a microphone hole (203) and acoustic holes (207, 214). A microphone for acquiring external sound may be placed inside the microphone hole (203), and in one embodiment, a plurality of microphones may be placed to detect the direction of sound. According to one embodiment, the acoustic holes (207, 214) may include an external acoustic hole (207) and a receiver hole (214) for communication. In one embodiment, the acoustic 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 acoustic holes (207, 214) (e.g., a piezo speaker).

[0080] 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 the second surface (210B) or side (210C) as well as on the first surface (210A) (e.g., a display (201)) of the housing (210). The electronic device (101) may further include at least one of, for example, a gesture sensor, a gyroscope sensor, a barometric pressure sensor, a magnetic sensor, an accelerometer sensor, a grip sensor, a color sensor, an IR (infrared) sensor, a biosensor, a temperature sensor, a humidity sensor, or an illuminance sensor.

[0081] According to one embodiment, the camera modules (205, 212, 213) may include a first camera module (205) facing a first surface (210A) of the electronic device (101), and a second camera module (212) and / or a flash (213) facing a second surface (210B). For example, the first camera module (205) and / or the second camera module (212) may include one or more lenses, an image sensor and / or an image signal processor. According to one embodiment, some of the camera modules (205, 212), including some camera modules (205) and / or some sensor modules (e.g., sensor module (204)), may be positioned so as to be exposed to the outside through at least a portion of the display (201). According to one embodiment, the first camera module (205) may include a punch hole camera positioned inside a hole or recess formed on the back surface of the display (201). For example, the first camera module (205) can receive at least a portion of light incident toward the first surface (210A) (or front) of the electronic device (101) through the display (201) inside the electronic device (101). According to one embodiment, the first camera module (205) and / or sensor module (204) may be positioned in the internal space of the electronic device (101) so as to be in contact with the external environment through a transparent area up to the front plate (202) of the display (201). Additionally, some sensor modules (204) may be positioned in the internal space of the electronic device so as to perform their functions without being visually exposed through the front plate (202).

[0082] According to one embodiment, the second camera module (212) may be placed inside the housing (210) such that the lens is exposed to the second side (210B) (or rear) of the electronic device (101). For example, the camera module (212) may be electrically connected to a printed circuit board. For example, the flash (213) may include a light-emitting diode or a xenon lamp. In one embodiment, one or more lenses (infrared camera, wide-angle and telephoto lenses) and image sensors may be placed 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) placed on the second side (210B) of the housing (210). An electronic device (101) or a processor (e.g., the processor (120) of FIG. 1) can detect depth information of a subject based on the time when infrared light is received from the sensor module.

[0083] The camera modules (205, 212, 213) are not limited to the above structure and can 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).

[0084] 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 attributes (e.g., angle of view) or functions. For example, a plurality of camera modules (205, 212) including lenses having different angles of view may be configured, and the electronic device (101) may control the camera modules (205, 212) to change the angle of view of the camera modules (205, 212) performed 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 IR (infrared) camera (e.g., a TOF (time of flight) camera, a structured light camera). According to one embodiment, the IR camera may operate as at least part of a sensor module. For example, the TOF camera may operate as at least part of a sensor module (not shown) for detecting the distance to a subject.

[0085] According to one embodiment, a key input device (217) may be disposed on a side (210C) of the housing (210). In one embodiment, the electronic device (101) may not include some or all of the aforementioned 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 side (210B) of the housing (210).

[0086] According to one embodiment, the light-emitting element (206) may be disposed, for example, on a first surface (210A) of a housing (210). The light-emitting element (206) may, for example, provide state information of an electronic device (101) in the form of light. In one embodiment, the light-emitting element (206) may, for example, provide a light source linked to the process of a camera module (205). The light-emitting element (206) may include, for example, an LED, an IR LED, and a xenon lamp.

[0087] According to one embodiment, the connector holes (208, 209) may include a first connector hole (208) capable of receiving a connector (e.g., USB connector) for transmitting and receiving power and / or data with an external electronic device, and a second connector hole (e.g., earphone jack) (209) capable of receiving a connector for transmitting and receiving audio signals with an external electronic device.

[0088] [Example 1]

[0089] FIG. 5 is a schematic perspective view of an optical system according to one embodiment of the present disclosure. FIG. 6 is a configuration diagram showing an optical system according to one embodiment of the present disclosure. FIG. 7 is a configuration diagram showing an optical system according to one embodiment of the present disclosure. FIG. 8a is a configuration diagram showing an optical system according to one embodiment of the present disclosure. FIG. 8b is a graph showing the spherical aberration of the optical system of FIG. 8a according to one embodiment disclosed in this document. FIG. 8c is a graph showing the astigmatism of the optical system of FIG. 8a according to one embodiment disclosed in this document. FIG. 8d is a graph showing the distortion rate of the optical system of FIG. 8a according to one embodiment disclosed in this document.

[0090] Referring to FIGS. 5 through 8d, in one embodiment, an electronic device (e.g., the electronic device (101) of FIGS. 1, 3 and 4) may include an optical system (300). An optical system according to one embodiment of the present disclosure (e.g., the optical system (300) of FIG. 8a, the optical system (400) of FIG. 9a, the optical system (500) of FIG. 10a, the optical system (600) of FIG. 11a) may constitute at least a part of a camera module of the electronic device (101) (e.g., the camera module (180) of FIG. 1, the camera module (290) of FIG. 2, the camera module (205) of FIG. 3 and / or the camera module (212) of FIG. 4). According to one embodiment, an electronic device (101) to which an optical system (300, 400, 500, 600, 700, 800) according to one embodiment of the present disclosure is applied may include various electronic devices including a camera module (e.g., tablet PC, drone), and wearable electronic devices formed to be wearable on various body parts such as a user's wrist or face (e.g., smart watch, smart glasses). As an example, the optical system (300) may constitute at least a portion of the rear camera (e.g., camera module (212) of FIG. 4) of the electronic device (e.g., electronic device (101) of FIG. 1, 3 and 4). As an example, the optical system (300) may constitute at least a portion of the front camera (e.g., camera module (205) of FIG. 3) of the electronic device (101), and in this case, may be positioned to receive light through a portion of the display (e.g., display (201) of FIG. 3) (or camera exposure area). Here, the camera exposure area may be a through hole (e.g., a punch-hole or a perforated hole) formed in a part of the display (201). In one embodiment, the through hole of the display (201) may be located in an active area (or screen area) of the display (201) where an image is displayed, or in an inactive area of ​​the display (201) located around the active area where an image is not displayed.

[0091] An optical system (300, 400, 500, 600, 700, 800) according to one embodiment of the present disclosure may be configured as a curved optical system in which incident light is reflected / refracted at least once and reaches an image sensor (IS) when it includes an optical member (e.g., prism, mirror), but this is not limited thereto, and may be configured as an optical system in which the path of incident light reaching the image sensor (IS) is formed as a straight line (e.g., a direct optical system).

[0092] According to one embodiment, the optical system (300) may include an image sensor (IS), a plurality of (e.g., three or more) lenses (G) (or a lens group including a plurality of lenses), an optical element (M) and / or an aperture (sto). According to one embodiment, the optical system (300) may be positioned on an optical axis (OI) extending from the direction where the subject (or external object, obj) is located to the image plane (img) (or image sensor (IS)) where the image (I) is formed. For example, the lenses (G), the aperture (sto), the optical element (M) and / or the image sensor (IS) may be substantially aligned on the optical axis (OI). The optical system (300) may further include additional configurations, and according to one embodiment, may further include an infrared blocking filter (F).

[0093] According to one embodiment, the image sensor (IS) may include an imaging plane (img) which is a plane on which an image is formed and receives at least a portion of the light focused through lenses (G) and / or an aperture (sto). According to one embodiment, the image sensor (IS) may be a sensor mounted on a circuit board or the like and positioned in alignment with an optical axis, and may respond to light. The image sensor (IS) may include, for example, a sensor such as a CMOS (complementary metal-oxide semiconductor) image sensor or a charge coupled device (CCD). The image sensor (IS) is not limited thereto and may include, for example, various devices that convert an image of a subject into an electrical image signal. The image sensor (IS) may acquire an image of a subject by detecting brightness information, grayscale ratio information, color information, etc., of the subject from light that has passed through a plurality of lenses.

[0094] Referring to FIGS. 5 to 8a, according to one embodiment, the imaging plane (img) of the image sensor (IS) may be arranged in parallel (or parallel) with respect to a first direction in which a plurality of lenses (G) (e.g., a first lens (L1), a second lens (L2), a third lens (L3)) are arranged. Here, the first direction may refer to a direction parallel to a part of the optical axis (OI) passing through the centers of the lenses (G) (e.g., a first lens (L1), a second lens (L2), a third lens (L3)). However, the direction and arrangement of the image sensor (IS) in the present disclosure are not limited and may be set and changed according to factors such as the magnification of the telephoto lens to be implemented in the optical system (300) and the design of the light path using the lenses (G) and optical member (M). For example, the imaging plane (img) of the sensor (IS) may be arranged at an angle in a first direction in which a plurality of lenses (G) (e.g., first lens (L1), second lens (L2), third lens (L3)) are arranged.

[0095] According to one embodiment, a plurality of lenses (G) of the optical system (300) may be arranged, arranged, or aligned on an optical axis (OI) extending from the object side (or external object, obj) to the image side (image side) or along at least a portion of the optical axis (OI). For example, the centers of the plurality of lenses (G) may be positioned on the optical axis (OI). In describing the configuration of the optical system (300) (e.g., lenses (G)) below, for example, the object side may indicate the direction in which the object (obj) is located, and the image side may indicate the direction in which the image plane (img) where the image is formed is located (or the direction toward the image sensor (IS)).

[0096] According to one embodiment, the lenses (G) may be formed from glass, a glass mold, or a synthetic resin (e.g., plastic). According to one embodiment, the material of the first lens (L1) may be glass or a glass mold. According to one embodiment, the materials of the first lens (L1) and the second lens (L2) may be glass or a glass mold. For example, the material of the third lens (L3) may be glass, a glass mold, or a synthetic resin. However, the number and material of the lenses (G) of the present disclosure are not limited, and additional lenses may be included, for example. For example, if some of the lenses (G) (e.g., the first lens (L1)) are formed from a glass material, the distance required for movement in the direction of the optical axis (OI) (e.g., movement for focusing) may be reduced, and the lens curvature may be reduced so that the lens thickness may be reduced, which may reduce the overall length of the lenses and be advantageous for miniaturization of the optical system.

[0097] In the present disclosure, the "total length of the lenses" may be the distance from the vertex of the subject-side surface (S2) of the first lens (L1) closest to the subject side among the lenses (G) to the vertex of the image-side surface of the lens furthest from the subject side. Here, the "vertex of the image-side surface of the lens furthest from the subject side" may be the vertex of the image-side surface (S7) of the third lens (L3), or, if a fourth lens (L4) is further included (e.g., see FIG. 10a), the vertex of the image-side surface (S9) of the fourth lens (L4). In the present disclosure, the vertex of a lens surface may be located at the center of the corresponding lens surface. In other words, the vertex of a lens surface may be the part closest to the image side when the corresponding lens surface is an image-side surface, the part closest to the subject-side surface when the corresponding lens surface is a subject-side surface, or the highest part.

[0098] According to one embodiment, the plurality of lenses (G) of the optical system (300) may comprise three lenses, including a first lens (L1), a second lens (L2), and a third lens (L3) arranged in a line along at least a portion of the optical axis (OI) extending from the object side to the image side. However, in the present disclosure, the number of lenses is not limited to the embodiments of FIGS. 5 to 8a. For example, the lenses (G) of the present disclosure may comprise two lenses, or may further comprise an additional lens (e.g., a fourth lens (L4) of FIG. 10a) aligned with the optical axis (OI) together with the first lens (L1), the second lens (L2), and the third lens (L3).

[0099] According to one embodiment, the lenses (G) may each include a 'subject side surface' which is a surface facing the subject (obj) and an 'image side surface' which is a surface facing the image (or image sensor (IS)). For example, the first lens (L1) may include a subject side surface (S2) and an image side surface (S3). For example, the second lens (L2) may include a subject side surface (S4) and an image side surface (S5). For example, the third lens (L3) may include a subject side surface (S6) and an image side surface (S7).

[0100] In the following detailed description, the terms “concave” or “convex” may be used to describe the shape of the subject side surface, which is the surface of the lenses (G) facing the subject (obj) side, and / or the image side surface, which is the surface facing the image sensor (IS) (or image plane (img)). For example, “the subject side surface is concave (toward the subject side)” may describe a shape in which the center of the radius of curvature of the subject side surface is located on the subject side. “The subject side surface is convex (toward the subject side)” may describe a shape in which the center of the radius of curvature 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 area) around a point intersecting the optical axis (OI) and a marginal area around or spaced apart from the paraxial region. In the present disclosure, references regarding the shape of a lens surface may be descriptions regarding the shape of the paraxial region of the lens surface. For example, even if one surface (paraxial region of said surface) of a lens (e.g., a first lens (L1)) is described as having a convex shape, the edge portion of said surface of said lens may be concave. Likewise, even if one surface (paraxial region of said surface) of a lens is described as having a concave shape, the edge portion of said surface of said lens may be convex.

[0101] According to one embodiment, at least some of the lenses (G) may have at least one of the subject side surface or image side surface formed as an aspheric surface. According to one embodiment (e.g., embodiments of FIGS. 5 to 11d), the subject side surface (S2) and / or image side surface (S3) of the first lens (L1) may be configured as an aspheric surface. According to one embodiment (e.g., embodiments of FIGS. 5 to 11d), the subject side surface (S4) and / or image side surface (S5) of the second lens (L2) may be configured as an aspheric surface. According to one embodiment (e.g., embodiments of FIGS. 5 to 11d), the subject side surface (S6) and / or image side surface (S7) of the third lens (L3) may be configured as an aspheric surface. According to one embodiment (e.g., the embodiment of FIGS. 10a to 10d), the subject side surface (S8) and / or image side surface (S9) of the fourth lens (L4) may be configured as an aspherical surface. However, the number and shape of the lenses are not limited, and the optical system of the present disclosure may additionally include aspherical lenses. For example, by forming the surfaces of the lenses (G) as aspherical surfaces, spherical aberration that may occur in the lenses can be suppressed, coma aberration at the periphery of the image sensor (IS) can be prevented, astigmatism can be easily controlled, and the occurrence of image plane curvature from the center to the periphery of the image plane (img) of the image sensor (IS) can be reduced.

[0102] In one embodiment, the first lens (L1) is the lens closest to the subject side (or the first lens from the subject side) and may have positive refractive power. For example, the subject side surface (S2) of the first lens (L1) may have a shape that is convex toward the subject side and / or the image side surface (S3) may have a shape that is convex toward the image side. For example, if the subject side surface (S2) has a shape that is convex toward the subject side, the increase in spherical aberration due to the large aperture of the lenses (G) can be suppressed. For example, the material of the first lens (L1) may be glass or a glass mold.

[0103] In one embodiment, the second lens (L2) is a second lens from the subject side and may have a positive refractive power. For example, the material of the second lens (L2) may be glass, a glass mold, or a synthetic resin. In one embodiment, the subject side surface (S4) of the second lens (L2) may be convex toward the subject side, and the image side surface (S5) of the second lens (L2) may be convex toward the subject side.

[0104] In one embodiment, the third lens (L3) is the third lens from the subject side and may have negative refractive power.

[0105] In one embodiment, at least one of the lenses (G) 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 FIG. 3 and FIG. 4) or a processor (e.g., the processor (120) of FIG. 1) may be configured to focus or adjust the focal length by reciprocating the lenses (G) 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 FIG. 3 and FIG. 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 (G) in a first direction in which the plurality of lenses (G) are arranged. In the present disclosure, the first direction may mean a virtual axis (or axial direction) passing through the centers of the lenses (G) while the lenses (G) are stationary, and may be parallel to a part of the optical axis (OI). According to one embodiment, when at least one of the lenses (G) is moved in the first direction, the image sensor (IS) and / or optical member (M) may be maintained in a stationary state. However, the configuration moved to perform focus adjustment (e.g., autofocus (AF)) and / or optical image stabilization (OIS) operations is not limited to lenses (G), and may be performed by moving an image sensor (IS) and / or an optical element (M). For example, an electronic device (101) or a processor (120) may perform a focus adjustment (e.g., autofocus (AF)) operation by moving the image sensor (IS) and / or the optical element (M) in a first direction in which the plurality of lenses (G) are arranged.

[0107] According to one embodiment, an electronic device (e.g., the electronic device (101) of FIG. 1 and / or the electronic device (101) of FIG. 3 and FIG. 4) or a processor (e.g., the processor (120) of FIG. 1) may be configured to perform optical image stabilization (OIS) by moving at least one of the lenses (G) in at least one direction perpendicular to the first direction in which the lenses (G) are arranged (e.g., left-right direction and up-down direction). According to one embodiment, the electronic device (101) or the processor (120) may be configured to perform optical image stabilization (OIS) by moving or rotating an optical member (M). However, the configuration moved to perform optical image stabilization (OIS) is not limited to the lenses (G) or the optical member (M), and may be performed by moving an image sensor (IS).

[0108] According to one embodiment, an optical member (M) may be positioned between lenses (G) and an image sensor (IS). The optical member (M) may be configured to refract and / or reflect light that passes through the lenses (G) and is incident on the image sensor (IS). For example, the path of the chief ray of a beam of light passing through (or emitted from) the optical member (M) may be parallel to the chief ray incident on the optical system (300) (or lenses (G)). According to one embodiment, the optical member (M) may include at least one mirror and / or at least one prism configured to refract and / or reflect light. For example, the optical member (M) may be configured to change the path of light at least once. According to one embodiment, a folded optical system (or folded camera) may be implemented by including the optical member (M) in the optical system (300). For example, the optical system (300) can secure the focal length of the optical system (300) in a limited accommodation space by providing an optical member (M) so as to miniaturize and / or slim the electronic device (e.g., the electronic device (101) of FIG. 3 and FIG. 4).

[0109] In one embodiment, the optical member (M) may be configured to change the path of light transmitted from the lenses (G) at least once. Referring to FIGS. 5, 6 and 8a, the optical member (M) may be configured to change the path of light transmitted from the lenses (G) once. Referring to FIGS. 5, 6 and 8a, according to one embodiment, the optical member (M) may include an incident surface (M1) (or subject side surface (S10)) where light passing through the lenses (G) is received, an exit surface (M4) (or image side surface (S13)) where light passing through the optical member (M) is emitted, and a reflection surface (M2) (or S11). For example, the optical member (M) may further include a virtual surface (M3) (or S12), and the virtual surface (M3) may be a dummy surface for measuring the specifications of the optical system (300) as described below in [Table 2] and [Table 3]. The reflective surface (M2) (or S11) may be configured to reflect light passing through the lenses (G) and the subject side surface (S10) and transmit it to the image side surface (S13) or the image sensor (IS). According to one embodiment, the reflective surface (M2) (or S11) of the optical member (M) may include at least one mirror and / or constitute part of a prism. According to one embodiment, the optical member (M) may be a single prism including the reflective surface (M2). According to one embodiment, if the reflective surface (M2) is configured to reflect light only without refraction, the reflective surface may be replaced with a mirror. The angle formed by the plane perpendicular to the principal ray of a beam of light incident on the optical member (M) (e.g., incident plane (M1)) and the reflection plane (M2) (e.g., α1 in FIG. 6) may be, for example, about 40 degrees to about 50 degrees, and according to one embodiment, about 45 degrees. The angle formed by the plane perpendicular to the principal ray of a beam of light emitted from the optical member (M) (e.g., exit plane (M3)) and the reflection plane (M2) (e.g., α3 in FIG. 6) may be, for example, about 40 degrees to about 50 degrees, and according to one embodiment, about 45 degrees.The angle (e.g., α2 in FIG. 6) formed by a plane perpendicular to the principal ray of a beam of light incident on the optical member (M) (e.g., incident plane (M1)) and a plane perpendicular to the principal ray of a beam of light emitted from the optical member (M) (e.g., exit plane (M3)) may be, for example, about 85 degrees to about 95 degrees, and according to one embodiment, about 90 degrees.

[0110] However, in the present disclosure, the number of light reflections by the optical member (M) or the path of light within the optical member (M) is not limited, and for example, referring to FIG. 7, the optical member (M) may be configured to change the path of light transmitted from the lenses (G) at least twice (e.g., six times). The optical member (M) may be configured to change the path of light transmitted from the lenses (G) once.

[0111] Referring to FIG. 7, according to one embodiment, the optical member (M) may include a first surface (E1), a second surface (E2), a third surface (E3), and a fourth surface (E4). For example, light passing through the lenses (G) may be received by the first surface (E1), reflected and / or refracted in turn by the second surface (E2), the first surface (E1), the third surface (E3), and the fourth surface (E4), and then emitted toward an image sensor (IS) through the third surface (E3). For example, the first surface (E1) may be configured to receive light passing through the lenses (G) and to reflect and / or refract the light to change the path of the light (e.g., twice). For example, the third surface (E3) may be configured to reflect and / or refract the light to change the path of the light (e.g., twice) and emitted toward an image sensor (IS). According to one embodiment, the first surface (E1), second surface (E2), third surface (E3), and fourth surface (E4) of the optical member (M) may include at least one mirror and / or constitute part of a prism. According to one embodiment, if the second surface (E2) and / or fourth surface (E4), which are reflective surfaces of the optical member (M), are configured to reflect light without refraction, the reflective surfaces may be replaced with mirrors. The angle (e.g., α5 in FIG. 7) formed by the plane perpendicular to the principal ray of the beam of light incident on the optical member (M) (e.g., first surface (E1)) and the second surface (E2) may be, for example, about 20 to about 40 degrees or about 25 to about 35 degrees. The angle formed by the plane perpendicular to the main beam of the beam emitted from the optical member (M) (e.g., the third plane (E3)) and the fourth plane (E4) (e.g., α6 in FIG. 7) may be, for example, about 20 to about 40 degrees or about 25 to about 35 degrees.

[0112] According to one embodiment, the aperture (sto) may be positioned adjacent to the lens among the lenses (G) closest to the image sensor (IS) (e.g., the third lens (L3) or the fourth lens (L4) of FIG. 10a). For example, the aperture (sto) may define an area from which light is emitted substantially from the lens among the lenses (G) closest to the image sensor (IS). According to one embodiment, the aperture (sto) may be implemented integrally with or as part of the image side or subject side of the lens among the lenses (G) closest to the image sensor (IS). According to one embodiment, the lenses (G) may include three lenses, in which case the aperture (sto) may be implemented on the image side (S7) of the third lens (L3). According to one embodiment, the aperture (sto) may be aligned in a direction perpendicular to the optical axis (OI) and the vertex of the upper side surface (S7) of the third lens (L3). For example, the aperture (sto) may be placed on a virtual plane that touches the vertex of the upper side surface (S7) of the third lens (L3). Here, the vertex of the upper side surface (S7) of the third lens (L3) may refer to the center of the upper side surface (S7) of the third lens (L3), that is, the part closest to the upper side or the highest part of the upper side surface (S7) of the third lens (L3). For example, the vertex of the upper side surface (S7) of the third lens (L3) may be the point where the optical axis (OI) intersects the upper side surface (S7). However, the position of the aperture (sto) in the present disclosure is not limited, and for example, the aperture (sto) may be positioned between the vertex of the upper side surface (S7) of the third lens (L3) and the subject (obj).

[0113] However, the lenses (G) may include an additional lens (e.g., the fourth lens (L4) of FIG. 10a), in which case the aperture (sto) may be aligned on the upper side surface (S9) of the fourth lens (L4) or in a direction perpendicular to the vertex of the upper side surface (S9) and the optical axis (OI).

[0114] According to one embodiment, the optical system (300) may further include an infrared blocking filter (F). According to one embodiment, the infrared blocking filter (F) may include a subject side surface (S14) and an image side surface (S15). For example, the infrared blocking filter (F) may block light (e.g., infrared) in a wavelength band that is not visible to the user's eyes but is detected by a film or image sensor (IS). For example, in an optical system or electronic device (101) intended for detecting infrared, the infrared blocking filter (F) may be replaced with a pass filter that transmits infrared and blocks visible light. For example, the infrared blocking filter (F) may be aligned with the image sensor (IS) along at least a portion of the optical axis (OI).

[0115] In the present disclosure, the radius of the lenses (G) (e.g., radius of curvature), effective focal length (f), OAL (overall length), TTL (total track length), air gap, thickness, or IH (image height) (or image height) of the image sensor (IS) may all have units of mm unless specifically noted. Additionally, the radius of the lenses (G), effective focal length, OAL, TTL, air gap, or thickness may be distances measured with respect to the optical axis (OI), and the IH of the image sensor (IS) may be a distance measured along a direction substantially perpendicular to the optical axis (OI) from a point where the optical axis (OI) intersects.

[0116] According to one embodiment of the present disclosure, the optical system (300) described with reference to FIGS. 5 to 8d and the optical system (400, 500, 600, 700, 800) described later with reference to FIGS. 9a to 13d may satisfy [Equation 1] described later and may satisfy [Equation 2], [Equation 3] and / or [Equation 4].

[0117] According to one embodiment, the optical system (300, 400, 500, 600, 700, 800) can satisfy the following [Equation 1].

[0118] [Equation 1]

[0119] 0.5 < OTTL / ImgH < 1.1

[0120] Here, OTTL (optical total track length) is the distance from the vertex of the subject side surface (S2) of the first lens (L1) to the vertex of the image side surface of the lens closest to the image side among the plurality of lenses, and ImgH may be the effective image height of the image sensor (IS). For example, ImgH may be half the diagonal length of the image sensor (IS). In the present disclosure, the effective image height may refer to the paraxial effective image height determined by y=f*tan(θ), etc.

[0121] According to one embodiment, if the value of 'OTTL / ImgH' in [Equation 1] of the optical system is 0.5 or less, which is the lower limit, the total length of the lenses may be shortened to the point where it is difficult to construct the optical system. If the value of 'OTTL / ImgH' in [Equation 1] of the optical system is 1.1 or more, which is the upper limit, the total length of the lenses may be increased, making it difficult to miniaturize the optical system. In the present disclosure, 'total length of the lenses' may be the distance from the vertex of the subject side surface (S2) of the first lens (L1) closest to the subject side among the lenses (G) to the vertex of the image side surface of the lens furthest from the subject side. Here, the ‘vertex of the image side surface of the lens furthest from the subject side’ may be the vertex of the image side surface (S7) of the third lens (L3) in the optical system (300) of [Example 1] of the present disclosure, the optical system (400) of [Example 2], the optical system (600) of [Example 4], the optical system (700) of [Example 5], and the vertex of the image side surface (S9) of the fourth lens (L4) in the optical system (500) of [Example 3].

[0122] According to one embodiment, the optical system (300, 400, 500, 600, 700, 800) can satisfy the following [Equation 2].

[0123] [Equation 2]

[0124] 1.45 < Nd_1 < 2.00

[0125] Here, Nd_1 may be the refractive index of the first lens (L1). If the value of 'Nd_1' in [Equation 2] of the optical system is 1.45 or lower, the refractive power required for the construction of the second lens (L2) is insufficient, making it difficult to secure an effective focal length or degrading the aberration correction performance. If the value of 'Nd_1' in [Equation 2] of the optical system is 2.00 or higher, it may be advantageous for securing the refractive power required for the construction of the second lens (L2); however, if the material of the second lens (L2) is glass or a glass mold, the dispersion value may decrease due to the characteristics of the material, and the chromatic aberration correction performance may degrade. For example, to ensure good performance of the lenses and ease of manufacturing, it may be advantageous for the value of 'Nd_1' in [Equation 2] to be between approximately 1.49 and approximately 1.90.

[0126] According to one embodiment, the optical system (300, 400, 500, 600, 700, 800) can satisfy the following [Equation 3].

[0127] [Equation 3]

[0128] 25 < Vd_1 < 90

[0129] Here, Vd_1 may be the dispersion value of the first lens (L1). If the value of 'Vd_1' in [Equation 3] of the optical system is 25 or less, which is the lower limit, it may be advantageous for chromatic aberration correction, but the material is soft, which may increase the difficulty of assembly and process control of the first lens (L1). If the value of 'Vd_1' in [Equation 3] of the optical system is 90 or more, which is the upper limit, the properties due to the material of the first lens (L1) may be improved, but the Abbe number is small, which may make it difficult to control chromatic aberration properly. For example, in order to have good performance with low chromatic aberration, it may be advantageous for the value of 'Vd_1' in [Equation 3] to be about 30 or more.

[0130] According to one embodiment, the upper limit of 'Vd_1' in [Equation 3] of the optical system may be about 60, about 55, or about 50. According to one embodiment, the material of the first lens (L1) may be glass and a glass mold, and when the refractive index is between 1.7 and 1.88 and the dispersion value (or 'Vd_1') is 30 or higher, it may be advantageous for securing performance and miniaturization of the optical system.

[0131] According to one embodiment, the optical system (300, 400, 500, 600, 700, 800) can satisfy the following [Equation 4].

[0132] [Equation 4]

[0133] -10 < f_tot / f_3 < -1.7

[0134] Here, f_tot is the total focal length of the plurality of lenses (G), and f_3 may be the focal length of the third lens (L3).

[0135] According to one embodiment, the third lens (L3) may have a negative refractive power and may be a lens that plays a major role in correcting field curvature and astigmatism among the lenses (G). According to one embodiment, if the value of 'f_tot / f_3' in [Equation 4] of the optical system is -10 or lower, the refractive power of the third lens (L3) increases, which is advantageous for correcting field curvature and astigmatism, but the performance of correcting distortion and coma aberration may be degraded. If the value of 'f_tot / f_3' in [Equation 4] of the optical system is -1.7 or higher, which is upper limit, the refractive power of the third lens (L3) decreases, and the performance of correcting field curvature and astigmatism may be degraded. According to one embodiment, the lower limit of 'f_tot / f_3' in [Equation 4] may be approximately -6 or approximately -5.

[0136] Table 1 below shows the values ​​of ‘OTTL / ImgH’ in Equation 1, ‘Nd_1’ in Equation 2, ‘Vd_1’ in Equation 3, and ‘f_tot / f_3’ in Equation 4 of the optical systems (300, 400, 500, 600, 700, 800) according to Equations 2, 3, and 4, which will be described later with reference to Equation 1 and FIGS. 9a to 11d. Referring to Table 1, it can be seen that the optical systems (300, 400, 500, 600, 700, 800) according to Equations 1 to 4 satisfy the above-described Equations 1 to 4.

[0137] Formula 1 Formula 2 Formula 3 4 Example 10.82 1.8830 40.81 -2.12 Example 20.84 1.8088 40.97 -2.24 Example 30.99 1.7729 49.52 -4.56 Example 40.71 1.954 32.32 -2.07 Example 50.79 1.49718 1.56 -1.85 Example 60.80 1.5928 68.62 -2.28

[0138] In one embodiment, the optical system (300) may be manufactured to satisfy the shapes of the lenses (G) (e.g., lens surfaces) described above and the [Equation 1], [Equation 2], [Equation 3] and / or [Equation 4] described above, and to have the specifications exemplified in the following [Table 2]. In [Table 2], lens surfaces 8 and 9 may be air gaps. In [Table 2], lens surface n may refer to Sn, and for example, lens surface 2 may represent the subject side surface (S2) of the first lens (L1) as S2. In [Table 2], lens surface n may refer to Sn, and for example, a lens surface marked with * may be aspherical, and for example, 4* may mean that the lens surface (S4) (e.g., the subject side surface (S4) of the second lens (L2)) is aspherical. In [Table 2], lens surface 1 may exemplify a gap between the first lens (L1) and the object (obj), and the measured value of its thickness may be the distance of the gap or an air gap. In [Table 2], lens surfaces 8 and 9 may be air gaps. In [Table 2], the surfaces indicated as lens surfaces 10, 11, 12 and 13 may refer to surfaces of the optical member (M). In [Table 2], lens surfaces 14 and 15 may refer to the subject side surface and image side surface of the infrared blocking filter (F). An optical system (300) implemented with the specifications of [Table 2] below may be an optical system having an effective focal length (EFL) of about 18.225 mm, an F-number (Fno) of about 2.881, an OTTL (distance from the vertex of the subject side surface (S2) of the first lens (L1) to the vertex of the image side surface (S7) of the third lens (L3)) of about 2.919 mm, an image height (IH) of about 3.575 mm, and an effective FOV of about 21.86.

[0139] Lens Surface Radius Thickness Effective Focal Length (EFL) Refractive Index (Nd) Abbe Number (Vd) Subject (obj) infinity infinity 1 infinity 0 2 6.40 1 2 10.9 20 2 3 14.98 4 1.88 30 40.8 1 3 11.5 0 2 20.0 49 9 4 4 * 4.26 4 2 40.96 9 6 4 1 2.90 5 1.5 4 4 10 5 6.1 4 5 * 9.9 2 19 70.3 9 19 4 6 * -8.0 9 2 2 50.5 8 70 0 -8.5 9 11.6 14 6 5 2 5.9 3 7 * (Aperture (sto)) 16.0 35 5 9 1.4 1 2 5 8 infinit y0.000009infinity0.0000010infinity2.25000infinity1.8466623.7811infinity2.25000infinity1.8466623.7812infinity2.25 000infinity1.8466623.7813infinity7.0040614infinity0.21000infinity1.5168064.1715infinity1.06102imginfinity0.02298

[0140] [Table 3] below lists the aspherical coefficients of the lens surfaces of the lenses (G), and the aspherical coefficients can be calculated through the following [Equation 1].

[0141] [Mathematical Formula 1]

[0142]

[0143] Here, 'z' is the distance in the direction of the optical axis (OI) from the point where the optical axis (OI) passes through the lens surface, 'c' is the reciprocal of the radius of curvature at the vertex of the lens (e.g., curvature), 'k' is the conic constant, 'r' is the distance perpendicular to the optical axis (OI) from the optical axis (OI) of the lenses (e.g., radial distance), and 'a m ' is the m-th Q correlated with surface sag departure con The coefficient, 'Q mcon ' is the mth Q con It can mean a polynomial. 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'J', 'K', 'L', 'M', 'N', 'O' in [Table 3] are aspherical coefficients, and Q con It may mean a coefficient. Here, 'u' may mean r / rn, and 'rn' may mean the normalization radius. The radius may represent, for example, a value indicating the degree of curvature at each point of a surface or curve. In the tables describing the aspherical coefficients of the lens surfaces of the lenses (G) in the present disclosure, Sn may refer to the nth lens surface (e.g., see FIG. 6, FIG. 7, FIG. 8a, FIG. 9a, FIG. 10a, FIG. 11a).

[0144] According to one embodiment, the subject side surface (S4) and / or image side surface (S5) of the second lens (L2) may be configured as an aspherical surface. According to one embodiment, the subject side surface (S6) and / or image side surface (S7) of the third lens (L3) may be configured as an aspherical surface.

[0145] 렌즈 면(Surface)S4S5S6S7곡률 반경(radius)4.26424E+009.92197E+00-8.09225E+001.60356E+01규격화 곡률 반경(normalization_radius)2.84775E+002.71444E+002.67451E+002.22130E+00k(Conic)-3.40790E+006.22120E+00-2.46685E+00-1.12080E+00A(4th) / C43.57804E-011.52518E-026.23027E-014.87245E-01B(6th) / C5-8.57123E-03-1.44392E-02-7.82071E-02-2.33478E-02C(8th) / C64.04417E-032.44484E-031.18394E-023.61716E-03D(10th) / C71.02088E-031.71419E-04-2.60288E-03-5.06877E-04E(12th) / C86.64632E-048.75100E-048.88937E-04-7.62548E-06F(14th) / C94.59357E-047.48361E-043.35494E-041.04588E-04G(16th) / C102.20183E-04-4.94632E-04-5.89712E-04-3.86663E-05H(18th) / C11-1.84687E-04-1.19642E-03-7.39224E-04-5.84287E-06J(20th) / C12-2.74330E-04-3.92744E-04-1.23649E-04-8.83554E-05K(22th) / C13-5.53896E-054.51644E-043.94621E-045.30667E-05L(24th) / C144.93252E-054.71829E-05-1.01062E-04-7.77657E-07M(26th) / C15-2.38641E-05-1.46481E-04-4.21326E-05-8.16761E-06N(28th) / C161.57366E-058.95284E-055.44423E-052.42983E-06O(30th) / C179.61215E-06-5.59035E-06-1.43159E-054.63056E-06

[0146] FIG. 8b is a graph showing the spherical aberration of an optical system (300) according to one embodiment of the present disclosure, wherein the horizontal axis represents the coefficient of longitudinal spherical aberration and the vertical axis represents the distance from the optical axis (OI) normalized, and shows the change in longitudinal spherical aberration according to the wavelength of light. Longitudinal spherical aberration is shown for light with 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 of a wavelength of 546.1000 (NM) of an optical system (300) according to one embodiment of the present disclosure, where 'X' (or 'S') is illustrated as a solid line representing the sagittal plane and 'Y' (or 'T') is illustrated as a dotted line representing the tangential plane (or meridional plane). FIG. 8d is a graph showing the distortion of light of a wavelength of 546.1000 (NM) of an optical system (300) according to one embodiment of the present disclosure. [Example 2]

[0147] FIG. 9a is a schematic diagram showing an optical system according to one embodiment of the present disclosure. FIG. 9b is a graph showing the spherical aberration of the optical system of FIG. 9a according to one embodiment disclosed in this document. FIG. 9c is a graph showing the astigmatism of the optical system of FIG. 9a according to one embodiment disclosed in this document. FIG. 9d is a graph showing the distortion rate of the optical system of FIG. 9a according to one embodiment disclosed in this document.

[0148] In the present disclosure, the configuration of the optical system (400) according to the embodiments of FIGS. 9a to 9d may be at least partially identical or similar to the configuration of the optical system (300) according to the embodiments of FIGS. 8a to 8d. The description of the first lens (L1), second lens (L2), and third lens (L3), aperture (sto), infrared blocking filter (F), and / or image sensor (IS) of the optical system (300) according to the embodiments of FIGS. 8a to 8d may be applied identically or similarly to the first lens (L1), second lens (L2), and third lens (L3), aperture (sto), infrared blocking filter (F), and / or image sensor (IS) of the optical system (400) according to the embodiments of FIGS. 9a to 9d.

[0149] The optical system (400) according to the embodiments of FIGS. 9a to 9d can satisfy [Equation 1], [Equation 2], [Equation 3] and / or [Equation 4] described above in the embodiments of FIGS. 8a to 8d.

[0150] In one embodiment, the optical system (400) may be manufactured with the specifications exemplified in the following [Table 4] and may have the aspherical coefficient of [Table 5]. In [Table 4], lens surface n may refer to Sn, and for example, lens surface 2 may represent the subject side surface (S2) of the first lens (L1) as S2. In [Table 4], lens surface n may refer to Sn, and for example, a lens surface marked with * may be aspherical, and for example, 4* may mean that lens surface (S4) (e.g., the subject side surface (S4) of the second lens (L2)) is aspherical. In [Table 4], lens surface 1 may exemplify the gap between the first lens (L1) and the subject (obj), and the measured value of its thickness may be the distance of the gap or the air gap. In [Table 4], lens surfaces 8 and 9 may be air gaps. In [Table 4], the surfaces labeled as lens surfaces 10, 11, 12, and 13 may refer to the surfaces of the optical member (M). In [Table 4], lens surfaces 14 and 15 may refer to the subject side and image side surfaces of the infrared blocking filter (F).

[0151] The optical system (400) implemented with the specifications of [Table 4] below may be an optical system having an effective focal length (EFL) of about 18.265 mm, an F-number (Fno) of about 2.872, an OTTL (distance from the vertex of the subject side surface (S2) of the first lens (L1) to the vertex of the image side surface (S7) of the third lens (L3)) of about 2.991 mm, an image height (IH) of about 3.575 mm, and an effective FOV of about 21.8.

[0152] Lens Surface Radius Thickness Effective Focal Length (EFL) Refractive Index (Nd) Abbe Number (Vd) Subject infinity infinity 1 infinity 0.045 132 * 6.37862 1.01 1441 4.765 1.80882 40.973 * 12.63387 0.04993 4 * 4.13225 0.89893 12.259 1.544105 6.145 * 9.957 400.504016 * (Aperture (sto)) - 5.24476 0.52652 - 8.167 1.614652 5.937 * 153.52613 1.426678in finity0.000009infinity0.0000010infinity2.25000infinity1.8466623.7811infinity2.25000infinity1.8466623.7812infinity2 .25000infinity1.8466623.7813infinity5.9646214infinity0.30000infinity1.5168064.1715infinity1.94760imginfinity0.05362

[0153] [Table 5] below lists the aspherical coefficients of the lenses (G) of the optical system (400), and the aspherical coefficients can be calculated through [Equation 1] described above by referring to [Table 3]. According to one embodiment, the subject side surface (S2) and / or image side surface (S3) of the first lens (L1) may be configured as aspherical. According to one embodiment, the subject side surface (S4) and / or image side surface (S5) of the second lens (L2) may be configured as aspherical. According to one embodiment, the subject side surface (S6) and / or image side surface (S7) of the third lens (L3) may be configured as aspherical.

[0154] 렌즈 면(Surface)S2S3S4S5S6S7곡률 반경(radius)6.37862E+001.26339E+014.13225E+009.95740E+00-5.24476E+001.53526E+02정규화 곡률 반경(normal_radius)3.18000E+003.05896E+002.87349E+002.77162E+002.64086E+002.25212E+00k(Conic)7.58651E-024.80480E+001.03705E-01-1.16850E+001.00750E+00-9.90000E+01A(4th) / C46.25469E-028.35334E-03-1.58242E-01-1.51574E-029.48117E-016.38875E-01B(6th) / C57.76629E-038.12453E-03-4.24324E-02-4.92328E-02-1.25200E-01-5.10358E-02C(8th) / C6-8.60374E-03-9.17521E-032.44825E-022.90819E-022.29932E-024.48494E-03D(10th) / C7-2.75624E-03-8.24780E-03-1.24843E-02-9.86970E-03-7.09683E-03-1.82947E-03E(12th) / C8-1.26577E-032.46049E-034.25126E-032.85876E-032.56335E-038.50480E-04F(14th) / C94.19500E-04-1.74375E-04-1.27087E-03-1.99886E-03-2.03225E-03-5.69686E-04G(16th) / C10-1.98451E-041.61511E-049.58562E-041.79982E-031.43094E-033.24690E-04H(18th) / C111.11970E-043.60851E-051.13901E-04-5.15871E-04-6.19819E-04-1.20958E-04J(20th) / C12-1.70768E-05-4.62318E-051.36977E-05-5.99418E-061.88316E-044.13453E-05K(22th) / C130.00000E+000.00000E+00-2.50536E-057.01049E-06-6.57071E-056.74074E-06L(24th) / C140.00000E+000.00000E +00-3.48896E-05-4.00601E-056.75787E-067.56462E-08M(26th) / C150.00000E+000.00000E+00-1.23316E-051. 08007E-05-8.68040E-06-1.49111E-05N(28th) / C160.00000E+000.00000E+00-6.19897E-084.45290E-069.27978 E-06-2.25100E-06O(30th) / C170.00000E+000.00000E+00-6.14983E-07-1.03796E-06-1.89560E-062.89375E-06.

[0155] FIG. 9b is a graph showing the spherical aberration of an optical system (400) according to one embodiment of the present disclosure, wherein the horizontal axis represents the coefficient of longitudinal spherical aberration and the vertical axis represents the distance from the optical axis (OI) normalized, showing the change in longitudinal spherical aberration according to the wavelength of light. Longitudinal spherical aberration is shown for light with wavelengths of, for example, 656.3000 (NM, nanometer), 587.6000 (NM), 546.1000 (NM), 486.1000 (NM), and 435.8000 (NM). FIG. 9c is a graph showing astigmatic field curves for light of a wavelength of 546.1000 (NM) of an optical system (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. 9d is a graph showing distortion for light of a wavelength of 546.1000 (NM) of an optical system (400) according to one embodiment of the present disclosure. [Example 3]

[0156] FIG. 10a is a schematic diagram showing an optical system according to one embodiment of the present disclosure. FIG. 10b is a graph showing the spherical aberration of the optical system of FIG. 10a according to one embodiment disclosed in this document. FIG. 10c is a graph showing the astigmatism of the optical system of FIG. 10a according to one embodiment disclosed in this document. FIG. 10d is a graph showing the distortion rate of the optical system of FIG. 10a according to one embodiment disclosed in this document.

[0157] In the present disclosure, the configuration of the optical system (500) according to the embodiments of FIGS. 10a to 10d may be at least partially identical or similar to the configuration of the optical system (300) according to the embodiments of FIGS. 8a to 8d. The description of the first lens (L1), second lens (L2), and third lens (L3), aperture (sto), infrared blocking filter (F), and / or image sensor (IS) of the optical system (300) according to the embodiments of FIGS. 8a to 8d may be applied identically or similarly to the first lens (L1), second lens (L2), and third lens (L3), aperture (sto), infrared blocking filter (F), and / or image sensor (IS) of the optical system (500) according to the embodiments of FIGS. 10a to 10d.

[0158] According to one embodiment, the plurality of lenses (G) of the optical system (500) may include four lenses, a first lens (L1), a second lens (L2), a third lens (L3), and a fourth lens (L4) arranged in a line along at least a portion of the optical axis (OI) extending from the object side to the image side.

[0159] In one embodiment, the first lens (L1) is the lens closest to the subject side (or the first lens from the subject side) and may have positive refractive power. For example, the subject side surface (S2) of the first lens (L1) may be convex toward the subject side and / or the image side surface (S3) may be convex toward the image side. For example, if the subject side surface (S2) is convex toward the subject side, the increase in spherical aberration due to the large aperture of the lenses (G) can be suppressed. For example, the material of the first lens (L1) may be glass or a glass mold. In one embodiment, the second lens (L2) is the second lens from the subject side and may have positive refractive power. For example, the material of the second lens (L2) may be glass, a glass mold, or a synthetic resin. In one embodiment, the subject-side surface (S4) of the second lens (L2) may be convex toward the subject, and the image-side surface (S5) of the second lens (L2) may be convex toward the subject. In one embodiment, the third lens (L3) is the third lens from the subject side and may have negative refractive power.

[0160] In one embodiment, the fourth lens (L4) is the fourth lens from the subject side and may have positive or negative refractive power.

[0161] According to one embodiment, the aperture (sto) may be positioned adjacent to the lens (e.g., the fourth lens (L4)) that is closest to the image sensor (IS) among the lenses (G). According to one embodiment, the aperture (sto) may be positioned adjacent to the edge of the image side surface (S9) of the fourth lens (L4), on the edge of the image side surface (S9), or aligned in a direction perpendicular to the vertex of the image side surface (S9) and the optical axis (OI).

[0162] According to one embodiment, the optical system (500) may further include an infrared blocking filter (F). According to one embodiment, the infrared blocking filter (F) may include a subject side surface (S16) and an image side surface (S17). For example, the infrared blocking filter (F) may block light (e.g., infrared) in a wavelength band that is not visible to the user's eyes but is detected by a film or image sensor (IS). For example, in an optical system or electronic device (101) intended for detecting infrared, the infrared blocking filter (F) may be replaced with a pass filter that transmits infrared and blocks visible light. For example, the infrared blocking filter (F) may be aligned with the image sensor (IS) along at least a portion of the optical axis (OI).

[0163] The optical system (500) according to the embodiments of FIGS. 10a to 10d may satisfy [Equation 1], [Equation 2], [Equation 3] and / or [Equation 4] described above in the embodiments of FIGS. 8a to 8d.

[0164] In one embodiment, the optical system (500) may be manufactured with the specifications exemplified in the following [Table 6] and may have the aspherical coefficients of [Table 7] and [Table 8]. In [Table 6], lens surface n may refer to Sn, and for example, lens surface 2 may represent the subject side surface (S2) of the first lens (L1) as S2. In [Table 6], lens surface n may refer to Sn, and for example, a lens surface marked with * may be aspherical, and for example, 4* may mean that the lens surface (S4) (e.g., the subject side surface (S4) of the second lens (L2)) is aspherical. In [Table 6], lens surface 1 may exemplify the gap between the first lens (L1) and the subject (obj), and the measured value of its thickness may be the distance of the gap or the air gap. In [Table 6], lens surfaces 10 and 11 may be air gaps. In [Table 6], lens surfaces 12, 13, 14 and 15 may refer to surfaces of the optical member (M). In [Table 6], lens surfaces 16 and 17 may refer to the subject side and image side surfaces of the infrared blocking filter (F).

[0165] The optical system (500) implemented with the specifications of [Table 6] below may be an optical system having an effective focal length (EFL) of about 18.23 mm, an F-number (Fno) of about 2.901, an OTTL (distance from the vertex of the subject side surface (S2) of the first lens (L1) to the vertex of the image side surface (S9) of the fourth lens (L4)) of about 3.53 mm, an image height (IH) of about 3.575 mm, and an effective FOV of about 21.9.

[0166] Lens Surface, Radius of Curvature, Thickness, Effective Focus Distance (EFL) Refractive Index (Nd) Abbe Number (Vd) Subject (obj) infinity infinity 1 infinity 0.00000 2* 6.35 38 3 1.2 11 43 6.776 1.77 28 8 49.5 23* - 28.07 14 20.05 79 5 4* 6.6 11 0 5 0.56 6 19 12.98 7 1.66 0 75 20.38 5* 26.78 70 8 0.2 35 6 36* 22.8 79 8 5 0.31 000 - 4.00 2 1.8 21 65 2 4.04 7* 2.88 16 20.77 0 69 8* - 11.4 32 100 378 12 3 5.60 8 1.5 44 0 15 5.99 9* (sto, Aperture)-7.284790.8000010infinity0.0000011infinity0.0000012infinity2.25000infinity1.8466623.7813infinity2.25000infinity1.846662 3.7814infinity2.25000infinity1.8466623.7815infinity6.0000016infinity0.3infinity1.5168064.1717infinity2.22526imginfinity0.001

[0167] Tables 7 and 8 below describe the aspherical coefficients of the lenses (G) of the optical system (500), and the aspherical coefficients can be calculated through the aforementioned [Equation 1] by referring to Table 3. According to one embodiment, the subject side surface (S2) and / or image side surface (S3) of the first lens (L1) may be configured as aspherical. According to one embodiment, the subject side surface (S4) and / or image side surface (S5) of the second lens (L2) may be configured as aspherical. According to one embodiment, the subject side surface (S6) and / or image side surface (S7) of the third lens (L3) may be configured as aspherical. According to one embodiment, the subject side surface (S8) and / or image side surface (S9) of the fourth lens (L4) may be configured as aspherical.

[0168] 렌즈 면(Surface)S2S3S4S5곡률 반경(radius)6.35383E+00-2.80714E+016.61105E+002.67871E+01정규화 곡률 반경(normal_radius)3.15000E+003.13306E+002.82291E+002.74367E+00k(Conic)-3.30824E+002.66345E+016.80739E-013.16990E+01A(4th) / C4-3.07084E-023.96613E-022.30618E-021.85022E-01B(6th) / C5-4.19335E-02-4.43688E-02-1.40294E-02-5.44805E-02C(8th) / C6-4.17413E-034.17532E-03-1.03631E-026.81082E-04D(10th) / C7-6.32556E-04-8.69152E-041.31944E-022.32870E-02E(12th) / C81.84399E-04-3.02525E-04-1.31967E-03-8.72052E-03F(14th) / C9-6.29079E-054.58016E-041.71560E-033.35430E-03G(16th) / C102.08536E-05-6.88597E-04-2.51011E-03-2.99852E-03H(18th) / C11-8.53332E-052.41772E-04-7.92246E-04-4.35619E-05J(20th) / C12-1.65019E-05-3.97698E-053.09928E-041.88619E-04K(22th) / C130.00000E+000.00000E+002.50561E-044.53086E-04L(24th) / C140.00000E+000.00000E+00-3.44243E-05-3.24290E-04M(26th) / C150.00000E+000.00000E+00-6.50749E-051.03497E-05N(28th) / C160.00000E+000.00000E+002.31275E-058.38765E-05O(30th) / C170.00000E+000.00000E+001.96690E-06-3.34728E-05

[0169] 렌즈 면(Surface)S6S7S8S9곡률 반경(radius)2.28798E+012.88162E+00-1.14321E+01-7.28479E+00정규화 곡률 반경(normal_radius)2.68795E+002.32039E+002.31755E+002.25000E+00k(Conic)1.55995E+01-1.66755E+00-9.90000E+01-9.76903E+00A(4th) / C41.05813E-03-9.08284E-021.47304E-012.06874E-01B(6th) / C54.27183E-034.81932E-029.47781E-025.63945E-02C(8th) / C66.61369E-03-7.13122E-04-1.02581E-02-6.14735E-03D(10th) / C79.66570E-033.09799E-031.71483E-03-2.40275E-04E(12th) / C8-7.73318E-03-2.05741E-031.13081E-036.73551E-04F(14th) / C94.37635E-031.14429E-03-3.41578E-04-2.11750E-04G(16th) / C10-1.76688E-033.70882E-055.51292E-05-1.25251E-04H(18th) / C114.40609E-042.54819E-04-9.40355E-054.42705E-05J(20th) / C12-5.08999E-04-7.96296E-04-5.60459E-04-1.86678E-04K(22th) / C137.89383E-043.48450E-042.12531E-041.03129E-04L(24th) / C14-5.20542E-04-3.12781E-052.65759E-059.24061E-06M(26th) / C151.40264E-04-1.38437E-05-4.42643E-05-1.83739E-05N(28th) / C16-3.20582E-06-1.58480E-05-1.12074E-055.86861E-07O(30th) / C17-5.78106E-06-7.25105E-06-1.66073E-05-5.99154E-06

[0170] FIG. 10b is a graph showing the spherical aberration of an optical system (500) according to one embodiment of the present disclosure, wherein the horizontal axis represents the coefficient of longitudinal spherical aberration and the vertical axis represents the distance from the optical axis (OI) normalized, and shows the change in longitudinal spherical aberration according to the wavelength of light. Longitudinal spherical aberration is shown for light with wavelengths of, for example, 656.3000 (NM, nanometer), 587.6000 (NM), 546.1000 (NM), 486.1000 (NM), and 435.8000 (NM). FIG. 10c is a graph showing astigmatic field curves for light of a wavelength of 546.1000 (NM) of an optical system (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. 10d is a graph showing distortion for light of a wavelength of 546.1000 (NM) of an optical system (500) according to one embodiment of the present disclosure. [Example 4]

[0171] FIG. 11a is a schematic diagram showing an optical system according to one embodiment of the present disclosure. FIG. 11b is a graph showing the spherical aberration of the optical system of FIG. 11a according to one embodiment disclosed in this document. FIG. 11c is a graph showing the astigmatism of the optical system of FIG. 11a according to one embodiment disclosed in this document. FIG. 11d is a graph showing the distortion rate of the optical system of FIG. 11a according to one embodiment disclosed in this document.

[0172] In the present disclosure, the configuration of the optical system (600) according to the embodiments of FIGS. 11a to 11d may be at least partially identical or similar to the configuration of the optical system (300) according to the embodiments of FIGS. 8a to 8d. The description of the first lens (L1), second lens (L2), and third lens (L3), aperture (sto), infrared blocking filter (F), and / or image sensor (IS) of the optical system (300) according to the embodiments of FIGS. 8a to 8d may be applied identically or similarly to the first lens (L1), second lens (L2), and third lens (L3), aperture (sto), infrared blocking filter (F), and / or image sensor (IS) of the optical system (600) according to the embodiments of FIGS. 11a to 11d.

[0173] The optical system (600) according to the embodiments of FIGS. 11a to 11d may satisfy [Equation 1], [Equation 2], [Equation 3] and / or [Equation 4] described above in the embodiments of FIGS. 8a to 8d.

[0174] In one embodiment, the optical system (600) may be manufactured with the specifications exemplified in the following [Table 9] and may have the aspherical coefficient of [Table 10]. In [Table 9], lens surface n may refer to Sn, and for example, lens surface 2 may represent the subject side surface (S2) of the first lens (L1) as S2. In [Table 9], lens surface n may refer to Sn, and for example, a lens surface marked with * may be aspherical, and for example, 4* may mean that lens surface (S4) (e.g., the subject side surface (S4) of the second lens (L2)) is aspherical. In [Table 9], lens surface 1 may exemplify the gap between the first lens (L1) and the subject (obj), and the measured value of its thickness may be the distance of the gap or the air gap. In [Table 9], lens surfaces 8 and 9 may be air gaps. In [Table 9], the surfaces labeled as lens surfaces 10, 11, 12, and 13 may refer to the surfaces of the optical member (M). In [Table 9], lens surfaces 14 and 15 may refer to the subject side and image side surfaces of the infrared blocking filter (F).

[0175] The optical system (600) implemented with the specifications of [Table 9] below may be an optical system having an effective focal length (EFL) of about 18.23 mm, an F-number (Fno) of about 2.929, an OTTL (distance from the vertex of the subject side surface (S2) of the first lens (L1) to the vertex of the image side surface (S7) of the third lens (L3)) of about 2.55 mm, an image height (IH) of about 3.575 mm, and an effective FOV of about 21.95.

[0176] Lens Surface Radius Thickness Effective Focal Length (EFL) Refractive Index (Nd) Abbe Number (Vd) Subject (obj) infinity infinity 1 infinity 0.00000 26.07465 0.6558 315.272 1.953743 2.323 9.81826 0.10000 4* 4.12986 1.081 161 2.482 1.497108 1.565 * 11.2081 20.281 766 * -4.7051 30.431 25 -8.823 1.61 444 25.947 * (Aperture (sto)) -34.80730 1.30000 8in finity0.000009infinity0.0000010infinity2.25000infinity1.8466623.7811infinity2.25000infinity1.8466623.7812infinity 2.25000infinity1.8466623.7813infinity6.0000014infinity0.30000infinity1.5168064.1715infinity2.72061imginfinity0.002

[0177] [Table 10] below lists the aspherical coefficients of the lenses (G) of the optical system (600), and the aspherical coefficients can be calculated through [Equation 1] described above by referring to [Table 3]. According to one embodiment, the subject side surface (S4) and / or image side surface (S5) of the second lens (L2) may be configured as aspherical. According to one embodiment, the subject side surface (S6) and / or image side surface (S7) of the third lens (L3) may be configured as aspherical.

[0178] 렌즈 면(Surface)S4S5S6S7곡률 반경(radius)4.12986E+001.12081E+01-4.70513E+00-3.48073E+01정규화 곡률 반경(normal_radius)2.88427E+002.75245E+002.72723E+002.28500E+00k(Conic)-3.10149E+00-3.95783E+01-6.70730E+01-3.41299E+01A(4th) / C43.57957E-011.88332E-014.54447E-017.60962E-01B(6th) / C5-3.58987E-02-5.38467E-02-3.35188E-02-5.48191E-02C(8th) / C6-4.20994E-035.95497E-03-5.21902E-031.13737E-02D(10th) / C7-1.49814E-03-1.00571E-036.22870E-03-2.72747E-03E(12th) / C8-2.99635E-051.59454E-03-2.57597E-036.40167E-04F(14th) / C99.90770E-05-1.60522E-041.85926E-03-1.92197E-04G(16th) / C101.03972E-047.70887E-04-5.63791E-049.82836E-06H(18th) / C111.91643E-041.65936E-031.89555E-034.04675E-05J(20th) / C121.69928E-042.20383E-04-1.11598E-049.58011E-06K(22th) / C138.67463E-05-6.16088E-04-1.65776E-04-2.37607E-05L(24th) / C141.96031E-05-2.31861E-04-2.88563E-042.08557E-06M(26th) / C15-2.35010E-055.86768E-055.57679E-052.21888E-06N(28th) / C16-2.33717E-051.87450E-05-4.36890E-051.34109E-05O(30th) / C17-5.40925E-06-5.47551E-05-2.76202E-05-8.37929E-06

[0179] FIG. 11b is a graph showing the spherical aberration of an optical system (600) according to one embodiment of the present disclosure, wherein the horizontal axis represents the coefficient of longitudinal spherical aberration and the vertical axis represents the distance from the optical axis (OI) normalized, showing the change in longitudinal spherical aberration according to the wavelength of light. Longitudinal spherical aberration is shown for light with wavelengths of, for example, 656.3000 (NM, nanometer), 587.6000 (NM), 546.1000 (NM), 486.1000 (NM), and 435.8000 (NM). FIG. 11c is a graph showing astigmatic field curves for light of a wavelength of 546.1000 (NM) of an optical system (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. 11d is a graph showing distortion for light of a wavelength of 546.1000 (NM) of an optical system (400) according to one embodiment of the present disclosure. [Example 5]

[0180] FIG. 12a is a schematic diagram showing an optical system according to one embodiment of the present disclosure. FIG. 12b is a graph showing the spherical aberration of the optical system of FIG. 12a according to one embodiment disclosed in this document. FIG. 12c is a graph showing the astigmatism of the optical system of FIG. 12a according to one embodiment disclosed in this document. FIG. 12d is a graph showing the distortion rate of the optical system of FIG. 12a according to one embodiment disclosed in this document.

[0181] In the present disclosure, the configuration of the optical system (700) according to the embodiments of FIGS. 12a to 12d may be at least partially identical or similar to the configuration of the optical system (300) according to the embodiments of FIGS. 8a to 8d. The description of the first lens (L1), second lens (L2), and third lens (L3), aperture (sto), infrared blocking filter (F), and / or image sensor (IS) of the optical system (300) according to the embodiments of FIGS. 8a to 8d may be applied identically or similarly to the first lens (L1), second lens (L2), and third lens (L3), aperture (sto), infrared blocking filter (F), and / or image sensor (IS) of the optical system (700) according to the embodiments of FIGS. 12a to 12d.

[0182] The optical system (700) according to the embodiments of FIGS. 12a to 12d may satisfy [Equation 1], [Equation 2], [Equation 3] and / or [Equation 4] described above in the embodiments of FIGS. 8a to 8d.

[0183] In one embodiment, the optical system (700) may be manufactured with the specifications exemplified in the following [Table 11] and may have the aspherical coefficients of [Table 12]. In [Table 11], lens surface n may refer to Sn, and for example, lens surface 2 may represent the subject side surface (S2) of the first lens (L1) as S2. In [Table 11], lens surface n may refer to Sn, and for example, a lens surface marked with * may be aspherical, and for example, 4* may mean that lens surface (S4) (e.g., the subject side surface (S4) of the second lens (L2)) is aspherical. In [Table 11], lens surface 1 may exemplify the gap between the first lens (L1) and the subject (obj), and the measured value of its thickness may be the distance of the gap or the air gap. In [Table 11], lens surfaces 8 and 9 may be air gaps. In [Table 11], the surfaces labeled as lens surfaces 10, 11, 12, and 13 may refer to the surfaces of the optical member (M). In [Table 11], lens surfaces 14 and 15 may refer to the subject side and image side surfaces of the infrared blocking filter (F).

[0184] The optical system (700) implemented with the specifications of [Table 11] below may be an optical system having an effective focal length (EFL) of about 18.595 mm, an F-number (Fno) of about 3.082, an OTTL (distance from the vertex of the subject side surface (S2) of the first lens (L1) to the vertex of the image side surface (S7) of the third lens (L3)) of about 19.534 mm, an image height (IH) of about 3.578 mm, and an effective FOV of about 21.46.

[0185] Lens Surface Radius Thickness Effective Focal Length (EFL) Refractive Index (Nd) Abbe Number (Vd) Subject (obj) infinity infinity 1 infinity 0.0 300 0 2 * 5.8 57 24 1.1 59 13 1 5.1 31 5.1 31 49 71 08 1.5 63 * 24.6 33 60 0.0 500 0 4 * 3.8 17 9 20.9 86 57 17.0 30 1.5 6 71 73 7.4 5 * 5.6 97 29 0.3 31 73 6 * 8.1 40 55 0.3 0 58 9 - 10.0 77 1.6 15 54 25.8 7 * (Aperture (sto)) 3.4 87 52 1.4 35 23 8 infi nity0.000009infinity0.0000010infinity2.25000infinity1.8466623.7811infinity2.25000infinity1.8466623.7812infinity2. 25000infinity1.8466623.7813infinity7.0107214infinity0.21000infinity1.5168064.1715infinity1.27418imginfinity0.02095

[0186] Table 12 below lists the aspherical coefficients of the lenses (G) of the optical system (700), and the aspherical coefficients can be calculated through the aforementioned [Equation 1] by referring to Table 3. According to one embodiment, the subject side surface (S2) and / or image side surface (S3) of the first lens (L1) may be configured as aspherical. According to one embodiment, the subject side surface (S4) and / or image side surface (S5) of the second lens (L2) may be configured as aspherical. According to one embodiment, the subject side surface (S6) and / or image side surface (S7) of the third lens (L3) may be configured as aspherical.

[0187] 렌즈 면(Surface)S2S3S4S5S6S7곡률 반경(radius)5.85724E+002.46336E+013.81792E+005.69729E+008.14055E+003.48752E+00정규화 곡률 반경(normal_radius)3.04060E+002.91093E+002.69677E+002.47908E+002.35438E+002.08000E+00k(Conic)1.09642E+00-5.89078E+00-1.14333E+00-5.34029E+00-7.50710E+01-6.33788E-01A(4th) / C42.90308E-021.41082E-011.10763E-014.32499E-023.15461E-012.00301E-01B(6th) / C54.90182E-04-1.33298E-026.64726E-032.75560E-02-4.05727E-02-1.42006E-02C(8th) / C6-6.48913E-046.21547E-031.00898E-02-4.03740E-03-1.98932E-03-3.57253E-03D(10th) / C7-1.69330E-04-3.78803E-03-4.23992E-044.64760E-033.64108E-032.32352E-03E(12th) / C8-3.22190E-041.10118E-03-1.71105E-04-3.77373E-03-4.06819E-03-1.79483E-03F(14th) / C93.05736E-043.08359E-044.34590E-041.06777E-031.43177E-037.07119E-04G(16th) / C102.66604E-046.42722E-043.72601E-04-1.22192E-03-1.17124E-03-5.03019E-04H(18th) / C11-2.70497E-04-1.32968E-03-8.68923E-041.09408E-031.39450E-035.80012E-04J(20th) / C125.35297E-051.00187E-033.87306E-04-7.80500E-04-1.13489E-03-3.40388E-04K(22th) / C131.98512E-04-2.64906E-051.49622E-04-1.13515E-041.43174E-04-7.84421E-05L(24th) / C14-1.46650E-04-4.93514E-04-3.95649E-043.75129E-044.26142E-042.42362E-04M(26th) / C154.88214E-054.59115E-042.01551E-04-2.57610E-04-4.17368E-04-1.47464E-04N(28th) / C161.43657E-05-1.83947E-04-9.51014E-066.90711E-051.41885E-043.98785E-06O(30th) / C176.28015E-064.43835E-05-2.03751E-05-8.80702E-06-1.70687E-051.65769E-05.

[0188] FIG. 12b is a graph showing the spherical aberration of an optical system (700) according to one embodiment of the present disclosure, wherein the horizontal axis represents the coefficient of longitudinal spherical aberration and the vertical axis represents the distance from the optical axis (OI) normalized, showing the change in longitudinal spherical aberration according to the wavelength of light. Longitudinal spherical aberration is shown for light with wavelengths of, for example, 656.3000 (NM, nanometer), 587.7000 (NM), 546.1000 (NM), 486.1000 (NM), and 435.8000 (NM). FIG. 12c is a graph showing astigmatic field curves for light of a wavelength of 546.1000 (NM) of an optical system (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. 12d is a graph showing distortion for light of a wavelength of 546.1000 (NM) of an optical system (400) according to one embodiment of the present disclosure. [Example 6]

[0189] FIG. 13a is a schematic diagram showing an optical system according to one embodiment of the present disclosure. FIG. 13b is a graph showing the spherical aberration of the optical system of FIG. 13a according to one embodiment disclosed in this document. FIG. 13c is a graph showing the astigmatism of the optical system of FIG. 13a according to one embodiment disclosed in this document. FIG. 13d is a graph showing the distortion rate of the optical system of FIG. 13a according to one embodiment disclosed in this document.

[0190] In the present disclosure, the configuration of the optical system (800) according to the embodiments of FIGS. 13a to 13d may be at least partially identical or similar to the configuration of the optical system (300) according to the embodiments of FIGS. 8a to 8d. The description of the first lens (L1), second lens (L2), and third lens (L3), aperture (sto), infrared blocking filter (F), and / or image sensor (IS) of the optical system (300) according to the embodiments of FIGS. 8a to 8d may be applied identically or similarly to the first lens (L1), second lens (L2), and third lens (L3), aperture (sto), infrared blocking filter (F), and / or image sensor (IS) of the optical system (800) according to the embodiments of FIGS. 13a to 13d.

[0191] The optical system (800) according to the embodiments of FIGS. 13a to 13d may satisfy [Equation 1], [Equation 2], [Equation 3] and / or [Equation 4] described above in the embodiments of FIGS. 8a to 8d.

[0192] In one embodiment, the optical system (800) may be manufactured with the specifications exemplified in the following [Table 13] and may have the aspherical coefficients of [Table 14]. In [Table 13], lens surface n may refer to Sn, and for example, lens surface 2 may represent the subject side surface (S2) of the first lens (L1) as S2. In [Table 13], lens surface n may refer to Sn, and for example, a lens surface marked with * may be aspherical, and for example, 4* may mean that lens surface (S4) (e.g., the subject side surface (S4) of the second lens (L2)) is aspherical. In [Table 13], lens surface 1 may exemplify the gap between the first lens (L1) and the subject (obj), and the measured value of its thickness may be the distance of the gap or the air gap. In [Table 13], lens surfaces 8 and 9 may be air gaps. In [Table 13], the surfaces labeled as lens surfaces 10, 11, 12, and 13 may refer to the surfaces of the optical member (M). In [Table 13], lens surfaces 14 and 15 may refer to the subject side and image side surfaces of the infrared blocking filter (F).

[0193] The optical system (800) implemented with the specifications of [Table 13] below may be an optical system having an effective focal length (EFL) of about 18.6 mm, an F-number (Fno) of about 2.99, an OTTL (distance from the peak of the subject side surface (S2) of the first lens (L1) to the peak of the image side surface (S7) of the third lens (L3)) of about 19.242 mm, an image height (IH) of about 3.575 mm, and an effective FOV of about 21.41.

[0194] Lens Surface Radius Thickness Effective Focal Length (EFL) Refractive Index (Nd) Abbe Number (Vd) Subject (obj) infinity infinity1 infinity -0.5000025.329311.1335713.6521.5928268.62314.271100.051184*4.647621.0700714.4851.5671737.395*9.726960.181706*5.923930.40967 -8.1421.6144425.947*(Aperture (sto))2.653381.500008inf infinity0.000009infinity0.0000010infinity2.25000infinity1.8466623.7811infinity2.25000infinity1.8466623.7812infinity2 .25000infinity1.8466623.7813infinity6.6436614infinity0.21000infinity1.5168064.1715infinity1.27499imginfinity0.017

[0195] Table 14 below lists the aspherical coefficients of the lenses (G) of the optical system (800), and the aspherical coefficients can be calculated using the above-described [Equation 1] by referring to Table 3. According to one embodiment, the subject side surface (S4) and / or image side surface (S5) of the second lens (L2) may be configured as aspherical. According to one embodiment, the subject side surface (S6) and / or image side surface (S7) of the third lens (L3) may be configured as aspherical.

[0196] Lens Surface S4 S5 S6 S7 Radius of Curvature 4.64762E+00 9.72696E+00 5.92393E+00 2.65338E+00 Normalized Curvature Radius (normal_radius)2.78512E+002.55500E+002.44823E+002.10000E+00k(Conic)3.26496E-02-2.23448E+00-2.48611E+01-1.15687E +00A(4th) / C46.68640E-029.81706E-021.06760E-014.55041E-02B(6th) / C52.37030E-025.02978E-03-2.82779E-027.18299E-03C(8 th) / C64.81227E-03-1.23364E-032.44104E-033.04121E-07D(10th) / C71.44463E-03-2.21963E-03-3.16422E-03-4.58591E-04E(12t h) / C89.25897E-05-1.83477E-03-5.88666E-04-1.40549E-04F(14th) / C9-2.89568E-04-1.97233E-03-1.34570E-03-1.78246E-04G(16 th) / C10-6.11605E-04-1.22407E-03-6.25174E-04-1.75414E-04H(18th) / C11-2.87578E-059.40793E-049.89108E-042.92170E-04J( 20th) / C12-1.29208E-04-5.81473E-04-6.57564E-04-9.27083E-05K(22th) / C13-8.87797E-051.07405E-041.11973E-04-2.32964E-05 L(24th) / C14-5.44846E-059.59573E-058.83091E-053.56223E-05M(26th) / C152.47675E-055.95677E-05-6.27662E-061.24449E-05N (28th) / C16-3.02564E-05-8.46508E-05-6.45251E-05-1.32803E-05O(30th) / C17-1.80860E-067.56786E-056.34540E-055.98714E-06

[0197] FIG. 13b is a graph showing the spherical aberration of an optical system (800) according to one embodiment of the present disclosure, wherein the horizontal axis represents the coefficient of longitudinal spherical aberration and the vertical axis represents the distance from the optical axis (OI) normalized, showing the change in longitudinal spherical aberration according to the wavelength of light. Longitudinal spherical aberration is shown for light with wavelengths of, for example, 656.3000 (NM, nanometer), 587.8000 (NM), 546.1000 (NM), 486.1000 (NM), and 435.8000 (NM). FIG. 13c is a graph showing astigmatic field curves for light of wavelength 546.1000 (NM) of an optical system (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. 13d is a graph showing distortion for light of wavelength 546.1000 (NM) of an optical system (400) according to one embodiment of the present disclosure. An optical system (or lens assembly) including a plurality of lenses can be applied to a camera module of various electronic devices (e.g., smartphones, tablet PCs, smartwatches, drones). Generally, an optical system for implementing a telephoto lens can be implemented as a folded optical system comprising an optical element (or reflective / refractive element) (e.g., a prism and / or mirror) configured to reflect the path of light passing through the lenses at least once. For example, such a folded optical system can be designed with a structure in which two optical elements are arranged front and back and multiple lenses are arranged between the two optical elements.In the former case, as lenses are positioned between two optical elements, there may be limitations in increasing the size of the lenses and the curved optical system, light path alignment may be difficult, and it may be challenging to manufacture optical systems with low F-numbers. For example, if such a curved optical system is designed with a structure in which multiple lenses, optical elements, and an image sensor are arranged in that order, it is advantageous to secure optical performance through a simplified structure and relatively reduce manufacturing costs.

[0198] In an optical system for implementing a telephoto lens (e.g., a curved optical system), multiple lenses are included, and the total length of the lenses (e.g., the distance from the vertex of the subject-side surface of the first lens closest to the subject side to the vertex of the image-side surface of the lens furthest from the subject side) is very long relative to the effective image height (IH) of the image sensor, so there may be difficulties in miniaturizing the entire optical system.

[0199] One embodiment of the present disclosure is intended to at least resolve the problems and / or disadvantages described above and at least provide the advantages described below. According to one embodiment of the present disclosure, an optical system (e.g., a curved optical system) for implementing a telephoto lens may be provided, comprising a plurality of lenses, wherein the total length of the lenses (e.g., the distance from the vertex of the subject-side surface of the first lens closest to the subject side to the vertex of the image-side surface of the lens furthest from the subject side) relative to the effective image height (IH) of an image sensor is minimized, and the overall size is reduced accordingly, and an electronic device including the same may be provided.

[0200] According to one embodiment of the present disclosure, an optical system may include a plurality of lenses, but the number of lenses is minimized, and the structure may be simplified by having a structure arranged in the order of a plurality of lenses, an optical member, and an image sensor, and the performance of the optical system may be secured through the optimization of the shape and material (e.g., glass material) of the lenses of the optical system, while the overall length of the lenses is minimized and the overall size of the optical system can be miniaturized.

[0201] An optical system (300, 400, 500, 600, 700, 800) according to one embodiment of the present disclosure may include a plurality (e.g., 3 or 4) lenses (G) and may include an optical member (M) that reflects and / or refracts light transmitted through the lenses. An optical system (300, 400, 500, 600, 700, 800) according to one embodiment of the present disclosure may be a curved optical system for implementing a telephoto lens. For example, the optical system (300, 400, 500, 600, 700, 800) can secure a back focal length (BFL) and telephoto ratio that are large relative to space by changing the path of light to the image sensor (IS) one or more times using an optical member (M), and accordingly, can contribute to the miniaturization and weight reduction of the size of the optical system and the electronic device (e.g., the electronic device (101) of FIGS. 1, 3 and 4) on which the assembly is mounted. For example, by including such an optical member (M), the arrangement direction of the image plane (img) of the image sensor (IS) with respect to the arrangement of lenses (G) can be designed in various ways. For example, the first direction in which the lenses (G) are arranged can be parallel or perpendicular to the image plane (img) of the image sensor (IS). Thus, an optical system (or imaging device or camera module) having high optical performance (e.g., telephoto performance) can be implemented in a miniaturized and lightweight electronic device (101) such as a smartphone. An optical system according to one embodiment of the present disclosure is designed to suppress or minimize aberrations of the optical system, such as chromatic aberration caused by an optical member (M), through a combination of the refractive power, shape, and material of the lenses, thereby providing high-resolution images while providing good telephoto performance.

[0202] The technical problems to be solved by the disclosure of this document are not limited to those mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art from the description in this document.

[0203] The effects obtainable from the disclosure of this document are not limited to those mentioned above, and other unmentioned effects will be clearly understood by a person skilled in the art to which this document belongs from the description in this document.

[0204] According to one embodiment of the present disclosure, an electronic device (101) may be provided. The electronic device may include an optical system (300, 400, 500, 600, 700, 800, optical system). The optical system may include a plurality of lenses (G) including a first lens (L1) and a second lens (L2) sequentially arranged along an optical axis (OI) in a direction from the object (obj) side toward the image (I) side, an image sensor (IS) including an image plane (img) where the image (I) is formed, and an optical member (M) disposed between the plurality of lenses and the image sensor and configured to change the path of light passing through the plurality of lenses at least once. The optical system may satisfy the following [Equation 1].

[0205] [Equation 1]

[0206] 0.5 < OTTL / ImgH < 1.1

[0207] (Here, OTTL is the distance from the vertex of the subject side surface (S2) of the first lens to the vertex of the upper side surface of the lens closest to the upper side among the plurality of lenses, and ImgH is the effective image height of the image sensor).

[0208] According to one embodiment, the first lens can satisfy the following [Equation 2] and [Equation 3].

[0209] [Equation 2]

[0210] 1.45 < Nd_1 < 2.00

[0211] [Equation 3]

[0212] 25 < Vd_1 < 90

[0213] (Here, Nd_1 in [Equation 2] is the refractive index of the first lens, and Vd_1 in [Equation 3] is the dispersion value of the first lens).

[0214] According to one embodiment, the first lens may have positive refractive power.

[0215] According to one embodiment, the second lens may have a defined refractive power.

[0216] According to one embodiment, the subject side surface (S4) of the second lens may be convex toward the subject, and the upper side surface (S5) of the second lens may be convex toward the subject.

[0217] According to one embodiment, the third lens (L3) positioned third from the subject side among the plurality of lenses can satisfy the following [Equation 4].

[0218] [Equation 4]

[0219] -10 < f_tot / f_3 < -1.7

[0220] (Here, f_tot is the total focal length of the plurality of lenses (G), and f_3 is the focal length of the third lens).

[0221] According to one embodiment, the focus adjustment operation may be performed by moving at least some of the plurality of lenses in a first direction in which the plurality of lenses are arranged.

[0222] According to one embodiment, optical image stabilization (OIS) may be performed by moving at least some of the plurality of lenses in at least one direction perpendicular to the first direction in which the plurality of lenses are arranged.

[0223] According to one embodiment, the optical member may be configured to perform optical image stabilization (OIS) by moving or rotating it.

[0224] According to one embodiment, the third lens (L3) positioned third from the subject side among the plurality of lenses may have a negative refractive power.

[0225] According to one embodiment, the optical member may include one or more reflective surfaces (M2; E1, E2, E3, E4, E5).

[0226] According to one embodiment, the imaging plane of the image sensor may be arranged parallel to a first direction in which the plurality of lenses are arranged.

[0227] According to one embodiment, the optical system may further include an aperture (sto) positioned around the edge of the upper side surface (S7 or S9) of the lens (L3 or L4) closest to the upper side among the plurality of lenses, or positioned to be aligned with the vertex of the upper side surface (S7 or S9).

[0228] According to one embodiment of the present disclosure, an optical system (300, 400, 500, 600, 700, 800, optical system) may be provided. The optical system may include a plurality of lenses (G) sequentially arranged along an optical axis (OI) in a direction from the object (obj) side toward the image (I) side, comprising a first lens (L1) having a positive refractive power, a second lens (L2) having a positive refractive power, and a third lens (L3) having a negative refractive power, and may include an optical member (M) disposed between the plurality of lenses and configured to change the path of light passing through the plurality of lenses at least once. The optical system may satisfy the following [Equation 1].

[0229] [Equation 1]

[0230] 0.5 < OTTL / ImgH < 1.1

[0231] (Here, OTTL is the distance from the vertex of the subject side surface (S2) of the first lens to the vertex of the upper side surface of the lens closest to the upper side among the plurality of lenses, and ImgH is the effective image height of the image sensor).

[0232] According to one embodiment, the first lens can satisfy the following [Equation 2] and [Equation 3].

[0233] [Equation 2]

[0234] 1.45 < Nd_1 < 2.00

[0235] [Equation 3]

[0236] 25 < Vd_1 < 90

[0237] (Here, Nd_1 in [Equation 2] is the refractive index of the first lens, and Vd_1 in [Equation 3] is the dispersion value of the first lens).

[0238] According to one embodiment, the subject side surface (S4) of the second lens may be convex toward the subject, and the upper side surface (S5) of the second lens may be convex toward the subject.

[0239] According to one embodiment, the third lens (L3) positioned third from the subject side among the plurality of lenses can satisfy the following [Equation 4].

[0240] [Equation 4]

[0241] -10 < f_tot / f_3 < -1.7

[0242] (Here, f_tot is the total focal length of the plurality of lenses (G), and f_3 is the focal length of the third lens).

[0243] According to one embodiment, the focus adjustment operation may be performed by moving at least some of the plurality of lenses in a first direction in which the plurality of lenses are arranged.

[0244] According to one embodiment, optical image stabilization (OIS) may be performed by moving at least some of the plurality of lenses in at least one direction perpendicular to the first direction in which the plurality of lenses are arranged.

[0245] According to one embodiment, the optical member may be configured to perform optical image stabilization (OIS) by moving or rotating it.

[0246] One embodiment disclosed in this document should be understood as an example rather than as limiting the disclosure. It will be obvious to those skilled in the art that various changes in form and detailed configuration may be made without departing from the whole context of the disclosure, including the appended claims and their equivalents.

[0247] An electronic device according to one embodiment disclosed in this document may be of various forms. The electronic device may include, for example, a portable communication device (e.g., a smartphone), a computer device, a portable multimedia device, a portable medical device, a camera, a wearable device, or a consumer electronics device. The electronic device according to the embodiment of this document is not limited to the aforementioned devices.

[0248] The embodiments of this document and the terms used therein are not intended to limit the technical features described in this document to a specific embodiment, and should be understood to include various modifications, equivalents, or substitutions of said 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 said items unless the relevant context clearly indicates otherwise. In this disclosure, phrases such as "A or B," "at least one of A and B," "at least one of A or B," "A, B or C," "at least one of A, B and C," and "at least one of A, B, or C" may each include any one of the items listed together in the corresponding phrase, or all possible combinations thereof. Terms such as "first," "second," or "first" or "second" may be used simply to distinguish said components from other said components and do not limit said components in any other aspect (e.g., importance or order). Where any (e.g., 1st) component is referred to as "coupled" or "connected" to another (e.g., 2nd) component, with or without the terms "functionally" or "communicationly," it means that said any component may be connected to said other component directly (e.g., via a wire), wirelessly, or through a third component.

[0249] As used in one embodiment of this document, the term “module” 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, for example. A module may be a component formed integrally, or a minimum unit of said component or a part thereof 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).

[0250] One embodiment of the present document may be implemented as software (e.g., program (140)) comprising one or more instructions stored in a storage medium (e.g., internal memory (136) or external memory (138)) readable by a machine (e.g., electronic device (101)). For example, a processor (e.g., processor (120)) of the machine (e.g., electronic device (101)) may call at least one of the one or more instructions stored in the storage medium and execute it. This enables the machine to be operated 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 that can be executed by an interpreter. The storage medium readable by the machine may be provided in the form of a non-transitory storage medium. Here, 'non-temporary' simply means that the storage medium is a tangible device and does not contain a signal (e.g., electromagnetic waves), and the term does not distinguish between cases where data is stored semi-permanently and cases where it is stored temporarily.

[0251] According to one embodiment, the method according to one embodiment disclosed herein may be provided by being included in a computer program product. The computer program product may be traded between a seller and a buyer as a product. The computer program product may be distributed in the form of a device-readable storage medium (e.g., compact disc read-only memory (CD-ROM)) or an application store (e.g., Play Store). TM It can be distributed online (e.g., downloaded or uploaded) through ) or directly between two user devices (e.g., smartphones). In the case of online distribution, at least a portion of the computer program product may be temporarily stored or temporarily created on a device-readable storage medium, such as the memory of a manufacturer's server, an application store's server, or a relay server.

[0252] According to one embodiment, each component (e.g., module or program) of the components described above may include a singular or multiple entities, and some of the multiple entities may be separated and placed in other components. According to one embodiment, one or more of the components or operations among the aforementioned components may be omitted, or one or more other components or operations may be added. Generally or additionally, multiple components (e.g., module or program) may be integrated into a single component. In this case, the integrated component may perform one or more functions of each of the multiple components in the same or similar manner as those performed by the corresponding component among the multiple components prior to integration. According to one embodiment, operations performed by the module, program, or other components 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) comprising an optical system (300; 400; 500; 600), The above optical system is, A plurality of lenses (G), including a first lens (L1) and a second lens (L2), sequentially arranged along an optical axis (OI) in a direction from the object (obj) side toward the image (I) side; An image sensor (IS) including an image plane (img) on ​​which an image (I) is formed; and It includes an optical member (M) disposed between the plurality of lenses and the image sensor and configured to change the path of light passing through the plurality of lenses at least once, and The above optical system is an electronic device satisfying the following [Equation 1] [Equation 1] 0.5 < OTTL / ImgH < 1.1 (Here, OTTL is the distance from the vertex of the subject side surface (S2) of the first lens to the vertex of the upper side surface of the lens closest to the upper side among the plurality of lenses, and ImgH is the effective image height of the image sensor).

2. In Paragraph 1, The above first lens is an electronic device satisfying the following [Equation 2] and [Equation 3]. [Equation 2] 1.45 < Nd_1 < 2.00 [Equation 3] 25 < Vd_1 < 90 (Here, Nd_1 in [Equation 2] is the refractive index of the first lens, and Vd_1 in [Equation 3] is the dispersion value of the first lens).

3. In Paragraph 1 or 2, The above first lens is an electronic device having positive refractive power.

4. In any one of paragraphs 1 to 3, The above second lens is an electronic device having a defined refractive power.

5. In any one of paragraphs 1 through 4, An electronic device in which the subject side surface (S4) of the second lens is convex toward the subject side, and the image side surface (S5) of the second lens is convex toward the subject side.

6. In any one of paragraphs 1 through 5, The third lens (L3) positioned third from the subject side among the plurality of lenses above is an electronic device satisfying the following [Equation 4]. [Equation 4] -10 < f_tot / f_3 < -1.7 (Here, f_tot is the total focal length of the plurality of lenses (G), and f_3 is the focal length of the third lens).

7. In any one of paragraphs 1 through 6, An electronic device configured to perform a focus adjustment operation by moving at least some of the plurality of lenses in a first direction in which the plurality of lenses are arranged.

8. In any one of paragraphs 1 through 7, An electronic device configured to perform optical image stabilization (OIS) by moving at least some of the plurality of lenses in at least one direction perpendicular to a first direction in which the plurality of lenses are arranged.

9. In any one of paragraphs 1 through 8, An electronic device configured to perform optical image stabilization (OIS) by moving or rotating the above-mentioned optical member.

10. In any one of paragraphs 1 through 9, An electronic device in which the third lens (L3), positioned third from the subject side among the plurality of lenses above, has negative refractive power.

11. In any one of paragraphs 1 through 10, The above optical member is an electronic device comprising one or more reflective surfaces (M2; E1, E2, E3, E4, E5).

12. In any one of paragraphs 1 through 11, The imaging plane of the above image sensor is an electronic device arranged parallel to a first direction in which the plurality of lenses are arranged.

13. In any one of paragraphs 1 to 12, The above optical system further comprises an aperture (sto) positioned around the edge of the image side surface (S7 or S9) of the lens (L3 or L4) closest to the image side among the plurality of lenses, or positioned to be aligned with the vertex of the image side surface (S7 or S9).

14. In an optical system (300; 400; 500; 600), A plurality of lenses (G) sequentially arranged along an optical axis (OI) in a direction from the object (obj) side toward the image (I) side, comprising a first lens (L1) having a positive refractive power, a second lens (L2) having a positive refractive power, and a third lens (L3) having a negative refractive power; An image sensor (IS) including an image plane (img) on ​​which an image (I) is formed; and It includes an optical member (M) disposed between the plurality of lenses and the image sensor and configured to change the path of light passing through the plurality of lenses at least once, and The above optical system is an optical system satisfying the following [Equation 1] [Equation 1] 0.5 < OTTL / ImgH < 1.1 (Here, OTTL is the distance from the subject-side vertex of the first lens to the upper vertex of the lens closest to the upper side among the plurality of lenses, and ImgH is the effective image height).

15. In Paragraph 14, The above first lens is an optical system satisfying the following [Equation 2] and [Equation 3] [Equation 2] 1.45 < Nd_1 < 2.00 [Equation 3] 25 < Vd_1 < 90 (Here, Nd_1 in [Equation 2] is the refractive index of the first lens, and Vd_1 in [Equation 3] is the dispersion value of the first lens).

Images