Optical system and electronic device comprising same

Abstract

According to an embodiment of the present disclosure, an electronic device comprising an optical system may be provided. The optical system may comprise: a lens group including at least five lenses including a first lens, a second lens, a third lens, a fourth lens, and a fifth lens sequentially arranged along the optical axis in a direction from the object side to the image side; and an image sensor including an imaging surface on which an image is formed.

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 comprising an optical system may be provided. The optical system may include a lens group comprising at least five lenses, including a first lens, a second lens, a third lens, a fourth lens, and a fifth lens, arranged sequentially along an optical axis in a direction from the subject side toward the image side, and an image sensor comprising an image plane on which an image is formed. The optical system may satisfy the following [Equation 1] and [Equation 2].

[0006] [Equation 1]

[0007] 0.6 < f*T1 < 2.5

[0008] [Equation 2]

[0009] SF < 0.55

[0010] (Here, f(focal length) in [Equation 1] is the effective focal length of the optical system and T1 is the distance from the subject side surface (S1) of the first lens to the image side surface (S6) of the third lens, and SF in [Equation 2] is L1-img / IH, where L1-img is the distance from the subject side surface of the first lens to the image side surface (S2) of the first lens and IH is the maximum height of the image plane).

[0011] According to one embodiment of the present disclosure, an electronic device comprising an optical system may be provided. The optical system may include a lens group comprising at least five lenses arranged sequentially along an optical axis from the subject side toward the image side, the lens group comprising a first lens having positive refractive power, a second lens having negative refractive power, a third lens (L3) having positive or negative refractive power, a fourth lens (L4) having positive refractive power, and a fifth lens having negative refractive power, and an image sensor comprising an image plane on which an image is formed. The optical system may satisfy the following [Equation 1] and [Equation 2].

[0012] [Equation 1]

[0013] 0.6 < f*T1 < 2.5

[0014] [Equation 2]

[0015] SF < 0.55

[0016] (Here, f(focal length) in [Equation 1] is the effective focal length of the optical system and T1 is the distance from the subject side surface (S1) of the first lens to the image side surface (S6) of the third lens, and SF in [Equation 2] is L1-img / IH, where L1-img is the distance from the subject side surface of the first lens to the image side surface (S2) of the first lens and IH is the maximum height of the image plane).

[0017] FIG. 1 is a block diagram of an electronic device in a network environment according to one embodiment of the present disclosure.

[0018] FIG. 2 is a block diagram illustrating a camera module according to one embodiment of the present disclosure.

[0019] FIG. 3 is a front perspective view of an electronic device according to one embodiment of the present disclosure.

[0020] FIG. 4 is a rear perspective view of an electronic device according to one embodiment of the present disclosure.

[0021] FIG. 5a is a schematic diagram showing an optical system according to one embodiment of the present disclosure.

[0022] FIG. 5b is a graph showing the spherical aberration of the optical system of FIG. 5a according to one embodiment disclosed in this document.

[0023] FIG. 5c is a graph showing the astigmatism of the optical system of FIG. 5a according to one embodiment disclosed in this document.

[0024] FIG. 5d is a graph showing the distortion rate of the optical system of FIG. 5a according to one embodiment disclosed in this document.

[0025] FIG. 6a is a schematic diagram showing an optical system according to one embodiment of the present disclosure.

[0026] FIG. 6b is a graph showing the spherical aberration of the optical system of FIG. 6a according to one embodiment disclosed in this document.

[0027] FIG. 6c is a graph showing the astigmatism of the optical system of FIG. 6a according to one embodiment disclosed in this document.

[0028] FIG. 6d is a graph showing the distortion rate of the optical system of FIG. 6a according to one embodiment disclosed in this document.

[0029] FIG. 7a is a schematic diagram showing an optical system according to one embodiment of the present disclosure.

[0030] FIG. 7b is a graph showing the spherical aberration of the optical system of FIG. 7a according to one embodiment disclosed in this document.

[0031] FIG. 7c is a graph showing the astigmatism of the optical system of FIG. 7a according to one embodiment disclosed in this document.

[0032] FIG. 7d is a graph showing the distortion rate of the optical system of FIG. 7a according to one embodiment disclosed in this document.

[0033] FIG. 8a is a schematic diagram showing an optical system according to one embodiment of the present disclosure.

[0034] FIG. 8b is a graph showing the spherical aberration of the optical system of FIG. 8a according to one embodiment disclosed in this document.

[0035] FIG. 8c is a graph showing the astigmatism of the optical system of FIG. 8a according to one embodiment disclosed in this document.

[0036] FIG. 8d is a graph showing the distortion rate of the optical system of FIG. 8a according to one embodiment disclosed in this document.

[0037] Throughout the attached drawings, similar parts, configurations, and / or structures may be assigned similar reference numbers.

[0038] 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)).

[0039] 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.

[0040] 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.

[0041] 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).

[0042] 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).

[0043] 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).

[0044] 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.

[0045] 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.

[0046] 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).

[0047] 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.

[0048] 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.

[0049] 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).

[0050] 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.

[0051] 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.

[0052] 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).

[0053] 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.

[0054] 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).

[0055] 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.

[0056] 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).

[0057] 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.

[0058] 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.

[0059] 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.

[0060] 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.

[0061] 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.

[0062] 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.

[0063] 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).

[0064] 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.

[0065] 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.

[0066] 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.

[0067] 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).

[0068] 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.

[0069] 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.

[0070] 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.

[0071] 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).

[0072] 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).

[0073] 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.

[0074] 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).

[0075] 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 (e.g., the printed circuit board (240a) of FIG. 4). For example, the flash (213) may include a light-emitting diode or a xenon lamp. In one embodiment, one or more lenses (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.

[0076] 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).

[0077] 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.

[0078] 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).

[0079] 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.

[0080] 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.

[0081] [Example 1]

[0082] FIG. 5a is a schematic diagram showing an optical system according to one embodiment of the present disclosure. FIG. 5b is a graph showing the spherical aberration of the optical system of FIG. 5a according to one embodiment disclosed in this document. FIG. 5c is a graph showing the astigmatism of the optical system of FIG. 5a according to one embodiment disclosed in this document. FIG. 5d is a graph showing the distortion rate of the optical system of FIG. 5a according to one embodiment disclosed in this document.

[0083] Referring to FIG. 5a, in one embodiment, an electronic device (e.g., the electronic device (101) of FIG. 1, FIG. 3 and FIG. 4) may include an optical system (300). The optical system (300) according to one embodiment of the present disclosure may constitute at least a part of the 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, the electronic device (101) to which the optical system (300) according to one embodiment of the present disclosure is applied may include various electronic devices including a camera module (e.g., tablet PC, drone), or 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).

[0084] According to one embodiment, the optical system (300) may include an image sensor (IS) and a lens group (G) comprising a plurality of lenses (L1, L2, L3, L4, L5), and may include a filter member (F) disposed between the lens group (G) and the image sensor (IS).

[0085] According to one embodiment, the lenses (L1, L2, L3, L4, L5) of the lens group (G), the image sensor (IS), and / or the filter member (F) may be substantially aligned on the optical axis (OI). For example, the optical system (300) may be configured as an optical system (e.g., a direct optical system) in which the path of incident light reaching the image sensor (IS) is formed as a straight line, but is not limited thereto, and may be configured as a curved optical system in which the incident light is reflected / refracted at least once and reaches the image sensor (IS) if a reflective member (e.g., a prism, a mirror) is included.

[0086] According to one embodiment, the image sensor (IS) may include an imaging plane (img) which receives at least a portion of the light focused through a lens group (G) and forms an image. According to one embodiment, the image sensor (IS) is a sensor mounted on a circuit board or the like and positioned in a state aligned 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.

[0087] In the present disclosure, the phrases “arranged sequentially along the optical axis (OI) in a direction toward the image side from the object side (or external object, obj)” or “aligned on the optical axis (OI)” may refer to lenses (L1, L2, L3, L4, L5) being arranged sequentially from the object side toward the image sensor (IS). In the embodiments described below, the ordinal numbers “first,” “second,” “third,” “fourth,” and “fifth” assigned to the lenses (L1, L2, L3, L4, L5) may refer to the order in which they are arranged in a direction toward the image sensor (IS) from the object side. For example, the first lens (L1) may be referred to or understood as “the first lens on the object side” or “the lens furthest from the image sensor (IS).” In one embodiment, an image sensor (IS) (e.g., an imaging plane (img)) may be aligned facing a lens group (G) on an optical axis (OI). The imaging plane (img) may receive or detect light aligned or focused by, for example, the lens group (G).

[0088] According to one embodiment, a lens group (G) may include a first lens (L1), a second lens (L2), a third lens (L3), a fourth lens (L4), and a fifth lens (L5) arranged on an optical axis (OI) extending from the subject (O) side to the image (I) side (or arranged sequentially along the optical axis (OI) in a direction toward the subject (O) side to the image (I) side). In the present disclosure, the number of lenses in the lens group (G) is not limited, and, for example, the lens group (G) may include more than 5 or fewer than 5 lenses.

[0089] For example, the optical system (300) may be positioned on an optical axis (OI) passing through the centers of a plurality of lenses (L1, L2, L3, L4, L5) from the object side (or external object) to the image side. In describing the configuration of each lens (L1, L2, L3, L4, L5) below, for example, the object side may indicate the direction in which the object (O) is located, and the image side may indicate the direction in which the image plane (img) where the image is formed is located.

[0090] According to one embodiment, lenses (L1, L2, L3, L4, L5) may each include a 'subject side surface' which is a surface facing the subject (O) 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 (S1) and an image side surface (S2). For example, the second lens (L2) may include a subject side surface (S3) and an image side surface (S4). For example, the third lens (L3) may include a subject side surface (S5) and an image side surface (S6). For example, the fourth lens (L4) may include a subject side surface (S7) and an image side surface (S8). For example, the fifth lens (L5) may include a subject side surface (S9) and an image side surface (S10).

[0091] In the following detailed description, the shapes of the subject side surface, which is the surface of the lens group (G) facing the subject (obj), and / or the image side surface, which is the surface facing the image sensor (IS) (or image plane (img)), may be described using the terms “concave” or “convex.” 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.

[0092] According to one embodiment, at least one of the lenses (L1, L2, L3, L4, L5) of the lens group (G) may have at least one of the subject side surface or image side surface formed as an aspheric surface. For example, by forming the lens surface of the lenses (L1, L2, L3, L4, L5) of the lens group (G) as an aspheric surface, spherical aberration that may occur in the lens 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.

[0093] 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. In one embodiment, the second lens (L2) is the second lens from the subject side and may have negative refractive power. In one embodiment, the third lens (L3) is the third lens from the subject side and may have positive or negative refractive power. In one embodiment, the fourth lens (L4) is the fourth lens from the subject side and may have positive refractive power. In one embodiment, the fifth lens (L5) is the fifth lens from the subject side and may have negative refractive power.

[0094] In one embodiment, at least two of the first lens (L1), the second lens (L2), or the third lens (L3) may include a material having a refractive index of 1.65 or higher. According to one embodiment, at least two of the first lens (L1), the second lens (L2), or the third lens (L3) are formed from a low-refractive-index material, and by optimizing the thickness of each lens and the spacing between the lenses, the reduction in aberrations caused by the reduction of the overall length of the optical system (300, 400, 500, 600) is improved, thereby reducing the reduction of distortion aberration, coma aberration, and chromatic aberration, and effectively correcting spherical aberration and astigmatism, so that an optical system (300, 400, 500, 600) in which the deterioration of resolution is minimized while the overall length is reduced can be provided. For example, the lenses (L1, L2, L3, L4, L5) may be formed of synthetic resin (e.g., plastic) or glass material.

[0095] 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 an image sensor (IS) and / or a plurality of lens groups (G) along an optical axis (OI). For example, the electronic device (101) may further include an actuator configured to move at least one of the image sensor (IS) and / or a plurality of lens groups (G) along the optical axis (OI).

[0096] 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 lens of an image sensor (IS) and / or a lens group (G) in a direction that intersects the optical axis (OI). In the present disclosure, "intersects" may mean a state forming an angle of 80 to 100 degrees or about 90 degrees. For example, the electronic device (101) may further include an actuator configured to move at least one of the image sensor (IS) and / or a plurality of lens groups (G) to the optical axis (OI).

[0097] According to one embodiment, an aperture (sto) may be positioned around the lens surface of at least one lens in the lens group (G). For example, the aperture (sto) may be configured and positioned to control the path of a central ray passing through the lens group (G) to substantially realize the F-number as a design value, and may be composed of a single or multiple apertures. For example, the aperture (sto) may include an aperture positioned facing the subject side surface (S1) of the first lens (L1) and / or an aperture positioned on or around at least one of the subject side surface (S3) or image side surface (S4) of the second lens. For example, the aperture (sto) may include a part of the lens barrel that accommodates the lens group (G) or a part of a spacer positioned inside the lens barrel to support the lenses (L1, L2, L3, L4, L5).

[0098] According to one embodiment, the optical system (300) may further include a filter member (F). According to one embodiment, the filter member (F) may be positioned between the lens closest to the image sensor (IS) among the lens group (G) (e.g., the fifth lens (L5)) and the image sensor (IS). For example, the filter member (F) may be configured to block light in a wavelength band (e.g., infrared) that is not visible to the user's naked eye but is detected by the film or the image sensor (IS). For example, in an optical system or electronic device (101) intended for detecting infrared, the filter member (F) may be replaced with a pass filter that transmits infrared and blocks visible light. For example, the filter member (F) may be aligned with the image sensor (IS) along at least a portion of the optical axis (OI). For example, the filter member (F) may be composed of a glass material or a synthetic resin material (e.g., polyurethane). For example, the filter member (F) may include a subject side surface (S11) and an upper side surface (S12).

[0099] In the present disclosure, lengths such as the radius of a lens group (G) (e.g., radius of curvature), effective focal length (f), thickness of lenses (L1, L2, L3, L4, L5) (e.g., center thickness), spacing between lenses (L1, L2, L3, L4, L5), or image height (IH) of an image sensor (IS) may all have units of mm unless specifically noted, and may be distances measured with respect to an optical axis (OI), for example, the image height of an 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.

[0100] 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) described later with reference to FIGS. 9a to 11d may satisfy [Equation 1] described later and may satisfy [Equation 2], [Equation 3] and / or [Equation 4].

[0101] According to one embodiment, the optical system (300, 400, 500, 600) can satisfy the following [Equation 1].

[0102] [Equation 1]

[0103] 0.6 < f*T1 < 2.5

[0104] Here, f (focal length) in [Equation 1] is the effective focal length of the optical system (300, 400, 500, 600), and T1 may be the distance from the subject side surface (S1) of the first lens (L1) to the image side surface (S6) of the third lens (L3). In the present disclosure, T1 may be the distance from the center or vertex of the subject side surface (S1) of the first lens (L1) to the center or vertex of the image side surface (S6) of the third lens (L3).

[0105] For example, if the upper limit of [Equation 1] is exceeded, it may be difficult to miniaturize and slim the optical system (300, 400, 500, 600) relative to the size of the image sensor (or IH (image height) (or upper height)), and if it is below the lower limit, it is advantageous for miniaturizing and slimming the optical system (300, 400, 500, 600), but manufacturability may be reduced.

[0106] According to one embodiment, the optical system (300, 400, 500, 600) can satisfy the following [Equation 2].

[0107] [Equation 2]

[0108] SF < 0.55

[0109] Here, SF of [Equation 2] is L1-img / IH, where L1-img is the distance from the subject side surface (S1) of the first lens (L1) to the image side surface (S2) of the first lens (L1), and IH (image height) (or image height) may be the maximum height of the image plane (img).

[0110] For example, if the upper limit of [Equation 2] is exceeded, it may be difficult to implement the optical system (300, 400, 500, 600) with a miniaturized and slimmed-down structure.

[0111] According to one embodiment, the optical system (300, 400, 500, 600) can satisfy the following [Equation 3].

[0112] [Equation 3]

[0113]

[0114] Here, f (focal length) is the effective focal length of the optical system (300, 400, 500, 600), CT1 is the sum of the center thicknesses of the first lens (L1), the second lens (L3), and the third lens (L3), CT2 is the sum of the center thicknesses of the first lens (L1), the second lens (L2), the third lens (L3), the fourth lens (L4), and the fifth lens (L5), SF is L1-img / IH, where L1-img is the distance from the subject side surface (S1) of the first lens (L1) to the image side surface (S2) of the first lens (L1), and IH may be the maximum height of the image plane (img).

[0115] For example, if the upper limit of [Equation 3] is exceeded, it may be difficult to implement a compact and slim optical system (300, 400, 500, 600) relative to the size of the image sensor (or IH (image height) (or upper height)), and if it is below the lower limit, the effective focal length is reduced, and distortion and spherical aberration increase, making it difficult to secure good optical performance.

[0116] According to one embodiment, the optical system (300, 400, 500, 600) can satisfy the following [Equation 4].

[0117] [Equation 4]

[0118]

[0119] Here, f (focal length) is the effective focal length of the optical system (300, 400, 500, 600), T1 is the distance from the subject side surface (S1) of the first lens (L1) to the image side surface (S6) of the third lens (L3), T2 is the distance from the subject side surface (S1) of the first lens (L1) to the image side surface (S9) of the fifth lens (L5), SF is L1-img / IH, where L1-img is the distance from the subject side surface (S1) of the first lens (L1) to the image side surface (S2) of the first lens (L1), and IH may be the maximum height of the image plane (img).

[0120] For example, if the upper limit of [Equation 4] is exceeded, it may be difficult to miniaturize and slim the optical system (300, 400, 500, 600), and if it is below the lower limit, the gap between the lenses (L1, L2, L3, L4, L5) may be reduced, which may lower the assembly ability.

[0121] According to one embodiment, the optical system (300, 400, 500, 600) can satisfy the following [Equation 5].

[0122] [Equation 5]

[0123]

[0124] Here, FOV is the field of view of the optical system (300, 400, 500, 600), and CT1 may be the sum of the center thicknesses of the first lens (L1), the second lens (L3), and the third lens (L3).

[0125] For example, if the upper limit of [Equation 5] is exceeded, it may be difficult to implement a compact and slim optical system (300, 400, 500, 600) relative to the size of the angle of view of the optical system (300, 400, 500, 600), and if it is below the lower limit, the thickness of the lenses (L1, L2, L3, L4, L5) (e.g., the first lens (L1), the second lens (L2) and / or the third lens (L3)) becomes thinner relative to the size of the angle of view, which may be advantageous for compactness and slimness, but may result in reduced manufacturability.

[0126] According to one embodiment, the optical system (300, 400, 500, 600) can satisfy the following [Equation 6].

[0127] [Equation 6]

[0128] 1.0 < f*CT1 < 1.8

[0129] Here, f(focal length) is the effective focal length of the optical system (300, 400, 500, 600), and CT1 may be the sum of the center thicknesses of the first lens (L1), the second lens (L3), and the third lens (L3).

[0130] For example, if the upper limit of [Equation 6] is exceeded, it may be difficult to implement a compact and slim optical system (300, 400, 500, 600) relative to the effective focal length of the optical system (300, 400, 500, 600), and if it is below the lower limit, the effective focal length is reduced, and distortion and spherical aberration increase, making it difficult to secure good optical performance.

[0131] According to one embodiment, the optical system (300, 400, 500, 600) can satisfy the following [Equation 7].

[0132] [Equation 7]

[0133]

[0134] Here, CT1 is the sum of the center thicknesses of the first lens (L1), the second lens (L3), and the third lens (L3), CT2 is the sum of the center thicknesses of the first lens (L1), the second lens (L2), the third lens (L3), the fourth lens (L4), and the fifth lens (L5), and IH may be the maximum height of the image plane (img).

[0135] For example, if the upper limit of [Equation 7] is exceeded, it may be difficult to reduce the overall length of the optical system (300, 400, 500, 600), and accordingly, it may be difficult to implement a miniaturized and slimmed-down optical system (300, 400, 500, 600), and if it is below the lower limit, the aberration correction performance is reduced, and manufacturing sensitivity increases, which may reduce manufacturability.

[0136] According to one embodiment, the optical system (300, 400, 500, 600) can satisfy the following [Equation 8].

[0137] [Equation 8]

[0138]

[0139] Here, T1 is the distance from the subject side surface (S1) of the first lens (L1) to the image side surface (S6) of the third lens (L3), T2 is the distance from the subject side surface (S1) of the first lens (L1) to the image side surface (S9) of the fifth lens (L5), and IH may be the maximum height of the image plane (img). In the present disclosure, T2 may be the distance from the center or vertex of the subject side surface (S1) of the first lens (L1) to the center or vertex of the image side surface (S9) of the fifth lens (L5).

[0140] According to one embodiment, the upper limit of [Equation 8] may be about 3.5 or about 3.0. For example, if the upper limit of [Equation 8] is exceeded, it may be difficult to reduce the overall length of the optical system (300, 400, 500, 600) relative to the size of the image sensor (or IH (image height) (or upper height)), and accordingly, it may be difficult to implement a miniaturized and slimmed-down optical system (300, 400, 500, 600), and if it is below the lower limit, the aberration correction performance may be degraded and it may be difficult to secure good optical performance.

[0141] According to one embodiment, the optical system (300, 400, 500, 600) can satisfy the following [Equation 9].

[0142] [Equation 9]

[0143] 0.3 < CT1 < 0.7

[0144] Here, CT1 may be the sum of the center thicknesses of the first lens (L1), the second lens (L3), and the third lens (L3).

[0145] For example, if the upper limit of [Equation 9] is exceeded, it becomes difficult to form a small module due to the increase in lens thickness, and if the lower limit is exceeded, it becomes difficult to manufacture due to the increased difficulty of lens processing.

[0146] According to one embodiment, the optical system (300, 400, 500, 600) can satisfy the following [Equation 10].

[0147] [Equation 10]

[0148] 0.3 < T1 < 2.0

[0149] Here, T1 may be the distance from the subject side surface (S1) of the first lens (L1) to the upper side surface (S6) of the third lens (L3).

[0150] For example, if the upper limit of [Equation 10] is exceeded, it may be difficult to slim down and miniaturize the optical system (300, 400, 500, 600) due to an increase in the thickness of the lenses (L1, L2, L3, L4, L5) (e.g., first lens (L1), second lens (L2) and / or third lens (L3)), and if it is below the lower limit, the difficulty of processing the lenses (L1, L2, L3, L4, L5) (e.g., first lens (L1), second lens (L2) and / or third lens (L3)) increases, which may reduce manufacturability.

[0151] Table 1 below may show the values ​​of the aforementioned Equations 1 to 10 for the optical systems (300, 400, 500, 600) according to Example 2, Example 3, and Example 4, described later with reference to Example 1 and FIGS. 6a to 8d. By referring to Table 1, it can be seen that the optical systems (300, 400, 500, 600) according to Example 1 to Example 4 satisfy the aforementioned Equations 1 to 10.

[0152] Example 1 Example 2 Example 3 Example 4 Formula 12.28 1.96 1.97 1.92 Formula 20.54 0.5 10.5 10.52 Formula 30.74 0.6 30.6 30.59 Formula 40.59 0.50 0.500.48 Formula 525.67 26.02 26.36 27.94 Formula 61.62 1.42 1.44 1.40 Formula 72.63 2.54 2.57 2.48 Formula 82.10 2.03 2.04 2.04 Formula 90.60 0.58 0.59 0.60 Formula 100.85 0.80 0.800.82

[0153] In one embodiment, the optical system (300) may be manufactured to satisfy the shapes of the lenses (L1, L2, L3, L4, L5) (e.g., lens surfaces) of the lens group (G) described above, and the specifications described above [Equation 1] and [Equation 2], and at least one of [Equation 3] to [Equation 10], and the specifications exemplified in the following [Table 2]. In [Table 2], S11 and S12 may refer to the subject side surface and image side surface of the infrared blocking filter (F).

[0154] The optical system (300) implemented with the specifications of [Table 2] below may be an optical system having an f (effective focal length) of about 2.63 mm, an F-number (Fno) of about 2.3, a field of view (FOV) of about 85.1 degrees, and an image height (IH) of about 5.108 mm.

[0155] Lens Surface Lens Surface Type Radius Thickness Refractive Index (Nd) Abbe Number (Vd) S1 Asphere 0.79 90.32 81.54 40 55.91 S2 Asphere 2.36 60.049 S3 Asphere 5.42 10.13 01.68 418.14 S4 (sto) Asphere 2.53 40.200 S5 Asphere 14.40 30.14 51.68 418.14 S6 Asphere 26.58 60.361 S7 Asphere 54.15 20.21 51.56 71 37.40 S8 Asphere -35.82 20.293 S9Asphere1.5460.3551.535055.75S10Asphere0.7910.083 S11Sphereinfinity0.1101.516764.19S12Sphereinfinity0.480

[0156] Tables 3 and 4 below list the aspherical coefficients of the lenses (L1, L2, L3, L4, L5) of the lens group (G), and the aspherical coefficients can be calculated through the following Equation 1.

[0157] [Mathematical Formula 1]

[0158]

[0159] Here, 'x' is the distance from the vertex of the lenses (L1, L2, L3, L4, L5) in the direction of the optical axis (OI), 'y' is the distance in the direction perpendicular to the optical axis (OI), 'R' is the radius of curvature from the vertex of the lenses (L1, L2, L3, L4, L5), 'K' is the conic constant, ' ' may mean an aspherical coefficient. In the present disclosure, E+01 is 10 1 Eul, E-02 is 10 -2 It can represent. The radius of curvature (Y Radius) can represent, for example, a value indicating the degree of curvature at each point of a surface or curve.

[0160] According to one embodiment, the subject side surface (S1) and image side surface (S2) of the first lens (L1), the subject side surface (S3) and image side surface (S4) of the second lens (L2), the subject side surface (S5) and image side surface (S6) of the third lens (L3), the subject side surface (S7) and image side surface (S8) of the fourth lens (L4), and the subject side surface (S9) and image side surface (S10) of the fifth lens (L5) may be configured as aspherical surfaces.

[0161] S1S2S3S4S5곡률 반경(Y Radius)0.7992.3665.4212.53414.403K-2.39E-011.29E+010.00E+005.02E+000.00E+00A43.28E-01-4.9 8E-01-6.41E-014.32E-01-4.11E-01A6-1.89E+01-1.60E+011.31E+01-6.82E+01-1.98E+01A87.04E+028. 72E+02-1.94E+025.42E+039.20E+02A10-1.67E+04-2.56E+04-3.15E+03-2.42E+05-2.54E+04A122.66E+0 54.73E+052.51E+056.96E+064.64E+05A14-2.97E+06-5.83E+06-6.20E+06-1.36E+08-5.88E+06A162.35E +074.95E+078.87E+071.86E+095.29E+07A18-1.35E+08-2.94E+08-8.31E+08-1.83E+10-3.44E+08A205.58E+081.22E+095.32E+091.28E+111.62E+09A22-1.66E+09-3.49E+09-2.35E+10-6.42E+11-5.47E+09A243 .45E+096.62E+097.07E+102.23E+121.30E+10A26-4.78E+09-7.65E+09-1.38E+11-5.12E+12-2.08E+10A2 83.96E+094.51E+091.58E+116.97E+122.01E+10A30-1.49E+09-7.67E+08-8.09E+10-4.26E+12-8.87E+09

[0162] S6S7S8S9S10곡률 반경(Y Radius)26.58654.152-35.8221.5460.791K0.00E+000.00E+002.57E+01-8.57E-01-3.84E+00A4-7.51E-0 1-6.00E-01-1.43E+00-2.67E+00-1.72E+00A61.26E+01-6.98E+006.90E+007.31E+006.20E+00A8-4.43E+0 22.10E+02-1.36E+01-1.68E+01-1.80E+01A101.03E+04-2.82E+03-1.20E+022.71E+013.90E+01A12-1.60 E+052.31E+041.25E+03-2.24E+01-6.22E+01A141.73E+06-1.28E+05-5.92E+03-2.96E+007.32E+01A16-1. 33E+074.92E+051.79E+042.90E+01-6.39E+01A187.34E+07-1.34E+06-3.71E+04-3.48E+014.13E+01A20-2.93E+082.61E+065.38E+042.35E+01-1.97E+01A228.33E+08-3.56E+06-5.47E+04-1.03E+016.79E+00A24 -1.65E+093.35E+063.81E+042.96E+00-1.65E+00A262.14E+09-2.06E+06-1.73E+04-5.46E-012.66E-01A 28-1.64E+097.43E+054.62E+035.89E-02-2.56E-02A305.65E+08-1.20E+05-5.48E+02-2.82E-031.11E-03

[0163] FIG. 5b 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, 656.2700 (NM, nanometer), 587.5600 (NM), 546.0700 (NM), 486.1300 (NM), and 435.8300 (NM). FIG. 5c is a graph showing astigmatic field curves for light of wavelength 546.0700 (NM) of an optical system (300) according to one embodiment of the present disclosure, where 'S' is an example of a sagittal plane as a solid line and 'T' is an example of a tangential plane (or meridional plane) as a dotted line. FIG. 5d is a graph showing distortion for light of wavelength 546.0700 (NM) of an optical system (300) according to one embodiment of the present disclosure.

[0164] [Example 2]

[0165] FIG. 6a is a schematic diagram showing an optical system according to one embodiment of the present disclosure. FIG. 6b is a graph showing the spherical aberration of the optical system of FIG. 6a according to one embodiment disclosed in this document. FIG. 6c is a graph showing the astigmatism of the optical system of FIG. 6a according to one embodiment disclosed in this document. FIG. 6d is a graph showing the distortion rate of the optical system of FIG. 6a according to one embodiment disclosed in this document.

[0166] In the present disclosure, the configuration of the optical system (400) according to the embodiments of FIGS. 6a to 6d may be at least partially identical or similar to the configuration of the optical system (300) according to the embodiments of FIGS. 5a to 5d. The description of the lens group (G) (e.g., first lens (L1), second lens (L2), third lens (L3), fourth lens (L4) and fifth lens (L5)), aperture (sto), infrared blocking filter (F) and / or image sensor (IS) of the optical system (300) according to the embodiments of FIGS. 5a to 5d may be applied identically or similarly to the lens group (G) (e.g., first lens (L1), second lens (L2), third lens (L3), fourth lens (L4) and fifth lens (L5)), aperture (sto), infrared blocking filter (F) and / or image sensor (IS) of the optical system (400) according to the embodiments of FIGS. 6a to 6d.

[0167] The optical system (400) according to the embodiments of FIGS. 6a to 6d satisfies the shapes of the lenses (L1, L2, L3, L4, L5) (e.g., lens surfaces) of the lens group (G) in the embodiments of FIGS. 5a to 5d and the above-described [Equation 1] and [Equation 2], and may satisfy at least one of [Equation 3] to [Equation 10].

[0168] In one embodiment, the optical system (400) may be manufactured with the specifications exemplified in the following [Table 5] and may have the aspherical coefficients of [Table 6] and [Table 7]. In [Table 4], lens surfaces 14 and 15 may refer to the subject side and image side of the infrared blocking filter (F).

[0169] The optical system (400) implemented with the specifications of [Table 5] below may be an optical system having an f (effective focal length) of about 2.46 mm, an F-number (Fno) of about 2.3, a field of view (FOV) of about 90 degrees, and an image height (IH) of about 5.108 mm.

[0170] Lens Surface Lens Surface Type Radius Thickness Refractive Index (Nd) Abbe Number (Vd) S1 Asphere 0.77 30.30 01.54 40 55.91 S2 Asphere 2.21 60.048 S3 Asphere 7.99 60.23 01.69 531 6.50 S4 (sto) Asphere 3.47 30.070 S5 Asphere -15.70 0.14 81.69 531 6.50 S6 Asphere -22.54 80.314 S7 Asphere 14.35 80.21 51.56 71 37.40 S8 Asphere -10.55 10.315 S9Asphere1.5570.3681.535055.75S10Asphere0.7510.102 S11Sphereinfinity0.1101.516764.19S12Sphereinfinity0.410

[0171] Tables 6 and 7 below describe the aspherical coefficients of the lenses (L1, L2, L3, L4, L5) of the lens group (G) of the optical system (400), and the aspherical coefficients can be calculated through the aforementioned [Equation 1] by referring to Tables 3 and 4. According to one embodiment, the subject side surface (S1) and image side surface (S2) of the first lens (L1), the subject side surface (S3) and image side surface (S4) of the second lens (L2), the subject side surface (S5) and image side surface (S6) of the third lens (L3), the subject side surface (S7) and image side surface (S8) of the fourth lens (L4), and the subject side surface (S9) and image side surface (S10) of the fifth lens (L5) may be configured as aspherical.

[0172] S1S2S3S4S5곡률 반경(Y Radius)0.7732.2167.9963.473-15.700K-3.80E-011.05E+010.00E+002.47E+010.00E+00A43.27E-01-5. 35E-01-1.05E-013.96E-01-8.21E-01A6-2.17E+01-1.34E+01-2.35E+01-2.67E+016.68E+00A89.82E+027 .86E+022.10E+031.94E+03-5.85E+02A10-2.81E+04-2.78E+04-9.57E+04-8.43E+042.73E+04A125.49E+056.44E+052.76E+062.59E+06-7.54E+05A14-7.57E+06-1.03E+07-5.36E+07-5.73E+071.36E+07A167.55E +071.15E+087.20E+089.23E+08-1.68E+08A18-5.49E+08-9.31E+08-6.86E+09-1.09E+101.45E+09A202.9 2E+095.42E+094.66E+109.26E+10-8.89E+09A22-1.11E+10-2.25E+10-2.24E+11-5.65E+113.83E+10A242 .99E+106.52E+107.43E+112.40E+12-1.13E+11A26-5.32E+10-1.25E+11-1.62E+12-6.69E+122.19E+11A2 85.64E+101.42E+112.10E+121.10E+13-2.48E+11A30-2.70E+10-7.26E+10-1.21E+12-8.15E+121.26E+11

[0173] S6S7S8S9S10곡률 반경(Y Radius)-22.54814.358-10.5511.5570.751K0.00E+000.00E+005.24E+00-8.53E-01-3.76E+00A4-8.22E- 01-4.52E-01-1.14E+00-2.43E+00-1.50E+00A66.37E+00-8.31E+006.06E+006.75E+005.16E+00A8-1.83E+ 022.36E+02-1.82E+01-1.86E+01-1.44E+01A103.76E+03-3.38E+03-8.85E+014.09E+013.02E+01A12-5.1 7E+042.97E+041.29E+03-6.15E+01-4.65E+01A144.95E+05-1.74E+05-7.13E+036.28E+015.25E+01A16-3. 41E+067.04E+052.40E+04-4.47E+01-4.36E+01A181.73E+07-2.01E+06-5.41E+042.25E+012.65E+01A20- 6.42E+074.05E+068.43E+04-7.97E+00-1.17E+01A221.73E+08-5.73E+06-9.12E+041.94E+003.73E+00A24 -3.27E+085.54E+066.72E+04-3.08E-01-8.22E-01A264.08E+08-3.50E+06-3.21E+042.76E-021.20E-01A28-2.99E+081.29E+068.99E+03-8.58E-04-1.03E-02A309.71E+07-2.13E+05-1.12E+03-2.97E-053.97E-04

[0174] FIG. 6b 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, 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, 656.2700 (NM, nanometer), 587.5600 (NM), 546.0700 (NM), 486.1300 (NM), and 435.8300 (NM), respectively. FIG. 6c is a graph showing astigmatic field curves for light of wavelength 546.0700 (NM) of an optical system (400) according to one embodiment of the present disclosure, where 'S' is an example of a sagittal plane as a solid line and 'T' is an example of a tangential plane (or meridional plane) as a dotted line. FIG. 6d is a graph showing distortion for light of wavelength 546.0700 (NM) of an optical system (400) according to one embodiment of the present disclosure.

[0175] [Example 3]

[0176] FIG. 7a is a schematic diagram showing an optical system according to one embodiment of the present disclosure. FIG. 7b is a graph showing the spherical aberration of the optical system of FIG. 7a according to one embodiment disclosed in this document. FIG. 7c is a graph showing the astigmatism of the optical system of FIG. 7a according to one embodiment disclosed in this document. FIG. 7d is a graph showing the distortion rate of the optical system of FIG. 7a according to one embodiment disclosed in this document.

[0177] In the present disclosure, the configuration of the optical system (500) according to the embodiments of FIGS. 7a to 7d may be at least partially identical or similar to the configuration of the optical system (300) according to the embodiments of FIGS. 5a to 5d. The description of the lens group (G) (e.g., first lens (L1), second lens (L2), third lens (L3), fourth lens (L4) and fifth lens (L5)), aperture (sto), infrared blocking filter (F) and / or image sensor (IS) of the optical system (300) according to the embodiments of FIGS. 5a to 5d may be applied identically or similarly to the lens group (G) (e.g., first lens (L1), second lens (L2), third lens (L3), fourth lens (L4) and fifth lens (L5)), aperture (sto), infrared blocking filter (F) and / or image sensor (IS) of the optical system (500) according to the embodiments of FIGS. 7a to 7d.

[0178] The optical system (500) according to the embodiments of FIGS. 7a to 7d satisfies the shapes of the lenses (L1, L2, L3, L4, L5) (e.g., lens surfaces) of the lens group (G) in the embodiments of FIGS. 5a to 5d and the above-described [Equation 1] and [Equation 2], and may satisfy at least one of [Equation 3] to [Equation 10].

[0179] In one embodiment, the optical system (500) may be manufactured with the specifications exemplified in the following [Table 8] and may have the aspherical coefficients of [Table 9] and [Table 10]. In [Table 4], lens surfaces 14 and 15 may refer to the subject side and image side of the infrared blocking filter (F).

[0180] The optical system (500) implemented with the specifications of [Table 8] below may be an optical system having an f (effective focal length) of about 2.45 mm, an F-number (Fno) of about 2.3, a field of view (FOV) of about 90 degrees, and an image height (IH) of about 5.108 mm.

[0181] Lens Surface Lens Surface Type Radius Thickness Refractive Index (Nd) Abbe Number (Vd) S1 Asphere 0.76 20.30 41.5 440 55.91 S2 Asphere 2.19 70.044 S3 Asphere 15.42 80.13 1.68 6718.41 S4 (sto) Asphere 4.13 60.172 S5 Asphere -13.06 10.15 21.68 6718.41 S6 Asphere -15.82 40.320 S7 Asphere 21.18 00.21 61.56 713 7.40 S8 Asphere -9.58 00.306 S9Asphere1.5640.3651.535055.75S10Asphere0.7670.101 S11Sphereinfinity0.1101.516764.19S12Sphereinfinity0.410

[0182] Tables 9 and 10 below describe the aspherical coefficients of the lenses (L1, L2, L3, L4, L5) of the lens group (G) of the optical system (500), and the aspherical coefficients can be calculated through the aforementioned [Equation 1] by referring to Tables 3 and 4. According to one embodiment, the subject side surface (S1) and image side surface (S2) of the first lens (L1), the subject side surface (S3) and image side surface (S4) of the second lens (L2), the subject side surface (S5) and image side surface (S6) of the third lens (L3), the subject side surface (S7) and image side surface (S8) of the fourth lens (L4), and the subject side surface (S9) and image side surface (S10) of the fifth lens (L5) may be configured as aspherical.

[0183] S1S2S3S4S5곡률 반경(Y Radius)0.7622.19715.4284.136-13.061K-3.69E-011.00E+010.00E+003.50E+010.00E+00A42.93E-01- 5.84E-01-5.31E-01-3.25E-01-1.12E+00A6-1.94E+015.27E+004.92E+018.14E+013.37E+01A89.22E+02- 4.81E+02-3.23E+03-6.25E+03-1.66E+03A10-2.67E+042.07E+041.36E+053.08E+055.26E+04A125.17E+05-5.57E+05-3.74E+06-9.93E+06-1.11E+06A14-7.02E+069.98E+067.02E+072.19E+081.64E+07A166.87E +07-1.23E+08-9.26E+08-3.40E+09-1.72E+08A18-4.90E+081.07E+098.70E+093.78E+101.29E+09A202.55E+09-6.63E+09-5.85E+10-3.01E+11-7.01E+09A22-9.58E+092.88E+102.79E+111.71E+122.70E+10A242 .53E+10-8.63E+10-9.25E+11-6.72E+12-7.23E+10A26-4.43E+101.69E+112.02E+121.74E+131.27E+11A284.63E+10-1.95E+11-2.61E+12-2.68E+13-1.32E+11A30-2.18E+101.01E+111.51E+121.85E+136.13E+10

[0184] S6S7S8S9S10곡률 반경(Y Radius)-15.82421.180-9.5801.5640.767K0.00E+000.00E+004.55E+01-8.57E-01-3.85E+00A4-7.46E-0 1-4.73E-01-1.10E+00-2.39E+00-1.44E+00A63.33E+00-4.08E+006.46E+006.56E+004.82E+00A8-6.71E- 021.09E+02-3.58E+01-1.77E+01-1.31E+01A10-1.62E+03-1.33E+031.42E+023.82E+012.64E+01A124.27 E+049.65E+03-3.53E+02-5.61E+01-3.88E+01A14-5.97E+05-4.50E+043.05E+025.60E+014.18E+01A165.3 4E+061.36E+051.33E+03-3.89E+01-3.30E+01A18-3.26E+07-2.53E+05-6.01E+031.91E+011.92E+01A201 .39E+082.15E+051.24E+04-6.63E+00-8.12E+00A22-4.16E+081.57E+05-1.56E+041.59E+002.47E+00A24 8.55E+08-6.53E+051.26E+04-2.54E-01-5.21E-01A26-1.15E+097.67E+05-6.40E+032.42E-027.26E-02A289.19E+08-4.33E+051.86E+03-1.08E-03-5.97E-03A30-3.28E+089.88E+04-2.37E+024.33E-062.20E-04

[0185] FIG. 7b 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, 656.2700 (NM, nanometer), 587.5600 (NM), 546.0700 (NM), 486.1300 (NM), and 435.8300 (NM). FIG. 7c is a graph showing astigmatic field curves for light of wavelength 546.0700 (NM) of an optical system (500) according to one embodiment of the present disclosure, where 'S' is an example of a sagittal plane as a solid line and 'T' is an example of a tangential plane (or meridional plane) as a dotted line. FIG. 7d is a graph showing distortion for light of wavelength 546.0700 (NM) of an optical system (500) according to one embodiment of the present disclosure.

[0186] [Example 4]

[0187] FIG. 8a is a schematic 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.

[0188] In the present disclosure, the configuration of the optical system (600) according to the embodiments of FIGS. 8a to 8d may be at least partially identical or similar to the configuration of the optical system (300) according to the embodiments of FIGS. 5a to 5d. The description of the lens group (G) (e.g., first lens (L1), second lens (L2), third lens (L3), fourth lens (L4) and fifth lens (L5)), aperture (sto), infrared blocking filter (F) and / or image sensor (IS) of the optical system (300) according to the embodiments of FIGS. 5a to 5d may be applied identically or similarly to the lens group (G) (e.g., first lens (L1), second lens (L2), third lens (L3), fourth lens (L4) and fifth lens (L5)), aperture (sto), infrared blocking filter (F) and / or image sensor (IS) of the optical system (600) according to the embodiments of FIGS. 8a to 8d.

[0189] The optical system (600) according to the embodiments of FIGS. 8a to 8d satisfies the shapes of the lenses (L1, L2, L3, L4, L5) (e.g., lens surfaces) of the lens group (G) in the embodiments of FIGS. 5a to 5d and the above-described [Equation 1] and [Equation 2], and may satisfy at least one of [Equation 3] to [Equation 10].

[0190] In one embodiment, the optical system (600) may be manufactured with the specifications exemplified in the following [Table 11] and may have the aspherical coefficients of [Table 12] and [Table 13]. In [Table 4], lens surfaces 14 and 15 may refer to the subject side and image side of the infrared blocking filter (F).

[0191] The optical system (600) implemented with the specifications of [Table 11] below may be an optical system having an f (effective focal length) of about 2.33 mm, an F-number (Fno) of about 2.3, a field of view (FOV) of about 92.98 degrees, and an image height (IH) of about 5.108 mm.

[0192] Lens Surface Lens Surface Type Radius Thickness Refractive Index (Nd) Abbe Number (Vd) S1 Asphere 0.79 70.30 61.54 40 55.91 S2 Asphere 2.20 50.037 S3 (sto) Asphere 5.58 30.23 1.68 04 18.15 S4 Asphere 3.04 70.084 S5 Asphere -6.59 90.16 51.68 04 18.15 S6 Asphere -7.29 40.259 S7 Asphere 60.28 80.25 91.56 71 37.40 S8 Asphere -2.41 80.343 S9Asphere8.9740.3781.535055.75S10Asphere1.1070.067 S11Sphereinfinity0.1101.516764.19S12Sphereinfinity0.410

[0193] Tables 12 and 13 below describe the aspherical coefficients of the lenses (L1, L2, L3, L4, L5) of the lens group (G) of the optical system (600), and the aspherical coefficients can be calculated through the aforementioned [Equation 1] by referring to Tables 3 and 4. According to one embodiment, the subject side surface (S1) and image side surface (S2) of the first lens (L1), the subject side surface (S3) and image side surface (S4) of the second lens (L2), the subject side surface (S5) and image side surface (S6) of the third lens (L3), the subject side surface (S7) and image side surface (S8) of the fourth lens (L4), and the subject side surface (S9) and image side surface (S10) of the fifth lens (L5) may be configured as aspherical.

[0194] S1S2S3S4S5곡률 반경(Y Radius)0.7972.2055.5833.047-6.599K-4.33E-014.48E+000.00E+001.34E+010.00E+00A4-8.13E-02-1.11E+00-2.11E-01-3.81E-01-1.93E+00A6-3.26E+014.64E+01-9.64E-025.13E+011.16E+02A83.01E+03-2.65E+031.53E+02-1.72E+03-5.04E+03A10-1.19E+059.31E+04-1.17E+043.41E+041.33E+05A122.76E+06-2.18E+065.03E+05-4.03E+05-2.33E+06A14-4.21E+073.53E+07-1.26E+072.91E+062.85E+07A164.46E+08-4.07E+082.02E+08-1.26E+07-2.49E+08A18-3.35E+093.38E+09-2.17E+093.00E+071.58E+09A201.81E+10-2.02E+101.59E+10-3.01E+07-7.25E+09A22-6.99E+108.62E+10-8.05E+100.00E+002.40E+10A241.88E+11-2.55E+112.76E+110.00E+00-5.54E+10A26-3.33E+114.98E+11-6.11E+110.00E+008.46E+10A283.53E+11-5.74E+117.91E+110.00E+00-7.68E+10A30-1.68E+112.97E+11-4.54E+110.00E+003.13E+10

[0195] S6S7S8S9S10곡률 반경(Y Radius)-7.29460.288-2.4188.9741.107K0.00E+000.00E+000.00E+00-7.46E-01-3.48E+00A4-9.50E-01-6.31E-02-1.03E-01-2.01E+00-1.06E+00A62.69E+01-3.49E-016.72E-018.10E+001.50E+00A8-1.00E+03-8.24E+00-5.78E+00-2.91E+012.01E+00A102.40E+045.43E+011.75E+016.65E+01-1.52E+01A12-3.79E+05-1.70E+02-2.62E+01-9.14E+013.57E+01A144.09E+062.92E+022.12E+017.45E+01-5.02E+01A16-3.08E+07-2.78E+02-9.11E+00-3.02E+014.75E+01A181.65E+081.37E+021.75E+00-3.76E+00-3.17E+01A20-6.33E+08-2.75E+01-7.04E-021.25E+011.51E+01A221.72E+090.00E+000.00E+00-7.74E+00-5.16E+00A24-3.22E+090.00E+000.00E+002.66E+001.22E+00A263.98E+090.00E+000.00E+00-5.48E-01-1.92E-01A28-2.91E+090.00E+000.00E+006.37E-021.79E-02A309.51E+080.00E+000.00E+00-3.23E-03-7.52E-04

[0196] FIG. 8b 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, 656.2700 (NM, nanometer), 587.5600 (NM), 546.0700 (NM), 486.1300 (NM), and 435.8300 (NM). FIG. 8c is a graph showing astigmatic field curves for light of wavelength 546.0700 (NM) of an optical system (600) according to one embodiment of the present disclosure, where 'S' is an example of a sagittal plane as a solid line and 'T' is an example of a tangential plane (or meridional plane) as a dotted line. FIG. 8d is a graph showing distortion for light of wavelength 546.0700 (NM) of an optical system (600) 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, in a telephoto optical system, it may be difficult to miniaturize the entire optical system while including multiple lenses and securing performance such as high resolution, aberration control performance, and design angle of view, that is, to configure the total length of the lenses (e.g., the distance from the vertex of the subject side of the first lens closest to the subject side to the vertex of the image side of the lens furthest from the subject side) to be short relative to the effective image height (IH) of the image sensor.

[0197] 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 having a telephoto (e.g., an angle of view of about 80 to about 100 degrees) 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) is minimized relative to the effective image height (IH) of the image sensor, and thereby the overall size is reduced, and an electronic device including the same may be provided.

[0198] According to one embodiment of the present disclosure, by configuring the first to third lenses with a high refractive index material and optimizing the thickness of each lens and the spacing between lenses, the reduction in aberrations caused by the reduction of the electric length of the optical system is improved, thereby minimizing the reduction of distortion aberration, coma aberration, and magnification chromatic aberration, and effectively correcting spherical aberration and astigmatism, so that the electric length of the optical system is reduced while minimizing the degradation of resolution, and an electronic device including the same may be provided.

[0199] 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.

[0200] 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.

[0201] According to one embodiment of the present disclosure, an electronic device (101) comprising an optical system (300; 400; 500; 600) may be provided. The optical system may include a lens group (G) comprising at least five lenses, including a first lens (L1), a second lens (L2), a third lens (L3), a fourth lens (L4), and a fifth lens (L5), arranged sequentially along an optical axis (OI) in a direction from the object (O) side toward the image (I) side, and an image sensor comprising an image plane (img) on ​​which an image (I) is formed. The optical system may satisfy the following [Equation 1] and [Equation 2].

[0202] [Equation 1]

[0203] 0.6 < f*T1 < 2.5

[0204] [Equation 2]

[0205] SF < 0.55

[0206] (Here, f(focal length) in [Equation 1] is the effective focal length of the optical system and T1 is the distance from the subject side surface (S1) of the first lens to the image side surface (S6) of the third lens, and SF in [Equation 2] is L1-img / IH, where L1-img is the distance from the subject side surface of the first lens to the image side surface (S2) of the first lens and IH is the maximum height of the image plane).

[0207] According to one embodiment, the first lens may have positive refractive power, the second lens may have negative refractive power, the third lens may have positive or negative refractive power, the fourth lens may have positive refractive power, and the fifth lens may have negative refractive power.

[0208] According to one embodiment, the optical system can satisfy the following [Equation 3].

[0209] [Equation 3]

[0210]

[0211] (Here, f(focal length) is the effective focal length of the optical system, CT1 is the sum of the center thicknesses of the first lens, the second lens, and the third lens, CT2 is the sum of the center thicknesses of the first lens, the second lens, the third lens, the fourth lens, and the fifth lens, SF is L1-img / IH, where L1-img is the distance from the subject side surface of the first lens to the image side surface of the first lens, and IH is the maximum height of the image plane).

[0212] According to one embodiment, the optical system can satisfy the following [Equation 4].

[0213] [Equation 4]

[0214]

[0215] (Here, f(focal length) is the effective focal length of the optical system, T1 is the distance from the subject side surface of the first lens to the image side surface of the third lens, T2 is the distance from the subject side surface of the first lens to the image side surface (S9) of the fifth lens, SF is L1-img / IH, where L1-img is the distance from the subject side surface of the first lens to the image side surface of the first lens, and IH is the maximum height of the image plane).

[0216] According to one embodiment, the optical system can satisfy the following [Equation 5].

[0217] [Equation 5]

[0218]

[0219] (Here, FOV is the field of view of the optical system, and CT1 is the sum of the center thicknesses of the first lens, the second lens, and the third lens).

[0220] According to one embodiment, the optical system can satisfy the following [Equation 6].

[0221] [Equation 6]

[0222] 1.0 < f*CT1 < 1.8

[0223] (Here, f(focal length) is the effective focal length of the optical system, and CT1 is the sum of the center thicknesses of the first lens, the second lens, and the third lens).

[0224] According to one embodiment, the optical system can satisfy the following [Equation 7].

[0225] [Equation 7]

[0226]

[0227] (Here, CT1 is the sum of the center thicknesses of the first lens, the second lens, and the third lens, CT2 is the sum of the center thicknesses of the first lens, the second lens, the third lens, the fourth lens, and the fifth lens, and IH is the maximum height of the image plane).

[0228] According to one embodiment, the optical system can satisfy the following [Equation 8].

[0229] [Equation 8]

[0230]

[0231] (Here, T1 is the distance from the subject side surface of the first lens to the image side surface of the third lens, T2 is the distance from the subject side surface of the first lens to the image side surface of the fifth lens, and IH is the maximum height of the image plane).

[0232] According to one embodiment, at least two of the first lens, the second lens, or the third lens may include a material having a refractive index of 1.65 or higher.

[0233] According to one embodiment, the optical system may further include at least one aperture (sto) positioned facing the subject side surface of the first lens, or at least one aperture (sto) positioned on or around at least one of the subject side surface (S3) or image side surface (S4) of the second lens.

[0234] According to one embodiment, the optical system may further include an actuator configured to move at least one of the image sensor or the lenses of the lens group along the optical axis (OI), and may be configured to perform a focus adjustment operation by moving at least one of the image sensor or the lenses of the lens group along the optical axis (OI).

[0235] According to one embodiment, the optical system may further include an actuator configured to move at least one of the image sensor or the lenses of the lens group in a direction intersecting the optical axis (OI), and may be configured to perform optical image stabilization (OIS) by moving at least one of the image sensor or the lenses of the lens group in a direction intersecting the optical axis (OI).

[0236] According to one embodiment, the optical system can satisfy the following [Equation 9].

[0237] [Equation 9]

[0238] 0.3 < CT1 < 0.7

[0239] (Here, CT1 is the sum of the center thicknesses of the first lens, the second lens, and the third lens).

[0240] According to one embodiment, the optical system can satisfy the following [Equation 10].

[0241] [Equation 10]

[0242] 0.3 < T1 < 2.0

[0243] (Here, T1 is the distance from the subject side surface of the first lens to the image side surface of the third lens).

[0244] According to one embodiment of the present disclosure, an electronic device (101) comprising an optical system (300; 400; 500; 600) may be provided. The optical system may include an image sensor comprising a lens group (G) comprising at least five lenses arranged sequentially along an optical axis (OI) from the object (O) side toward the image (I) side, the lens group comprising a first lens (L1) having positive refractive power, a second lens (L2) having negative refractive power, a third lens (L3) having positive or negative refractive power, a fourth lens (L4) having positive refractive power, and a fifth lens (L5) having negative refractive power, and an image plane (img) on ​​which an image (I) is formed. The optical system may satisfy the following [Equation 1] and [Equation 2].

[0245] [Equation 1]

[0246] 0.6 < f*T1 < 2.5

[0247] [Equation 2]

[0248] SF < 0.55

[0249] (Here, f(focal length) in [Equation 1] is the effective focal length of the optical system and T1 is the distance from the subject side surface of the first lens to the image side surface of the third lens, and SF in [Equation 2] is L1-img / IH, where L1-img is the distance from the subject side surface of the first lens to the image side surface of the first lens and IH is the maximum height of the image plane).

[0250] According to one embodiment, the optical system can satisfy the following [Equation 9].

[0251] [Equation 9]

[0252] 0.3 < CT1 < 0.7

[0253] (Here, CT1 is the sum of the center thicknesses of the first lens, the second lens, and the third lens).

[0254] According to one embodiment, the optical system can satisfy the following [Equation 10].

[0255] [Equation 10]

[0256] 0.3 < T1 < 2.0

[0257] (Here, T1 is the distance from the subject side surface of the first lens to the image side surface of the third lens).

[0258] According to one embodiment, the optical system can satisfy the following [Equation 3].

[0259] [Equation 3]

[0260]

[0261] (Here, f(focal length) is the effective focal length of the optical system, CT1 is the sum of the center thicknesses of the first lens, the second lens, and the third lens, CT2 is the sum of the center thicknesses of the first lens, the second lens, the third lens, the fourth lens, and the fifth lens, SF is L1-img / IH, where L1-img is the distance from the subject side surface of the first lens to the image side surface of the first lens, and IH is the maximum height of the image plane).

[0262] According to one embodiment, the optical system can satisfy the following [Equation 4].

[0263] [Equation 4]

[0264]

[0265] (Here, f(focal length) is the effective focal length of the optical system, T1 is the distance from the subject side surface of the first lens to the image side surface of the third lens, T2 is the distance from the subject side surface of the first lens to the image side surface (S9) of the fifth lens, SF is L1-img / IH, where L1-img is the distance from the subject side surface of the first lens to the image side surface of the first lens, and IH is the maximum height of the image plane).

[0266] According to one embodiment, at least one of the subject side surface or image side surface of at least one of the first lens, second lens, third lens, fourth lens, or fifth lens may be formed as an aspherical surface.

[0267] 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.

[0268] 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.

[0269] 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.

[0270] 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).

[0271] 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.

[0272] 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.

[0273] 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) including an optical system (300; 400; 500; 600), The above optical system is, A lens group (G) comprising at least five lenses, including a first lens (L1), a second lens (L2), a third lens (L3), a fourth lens (L4), and a fifth lens (L5), arranged sequentially along an optical axis (OI) in a direction from the object (O) side toward the image (I) side; and It includes an image sensor comprising an image plane (img) on ​​which an image (I) is formed, and The above optical system is an electronic device satisfying the following [Equation 1] and [Equation 2]. [Equation 1] 0.6 < f*T1 < 2.5 [Equation 2] SF < 0.55 (Here, f(focal length) in [Equation 1] is the effective focal length of the optical system and T1 is the distance from the subject side surface (S1) of the first lens to the image side surface (S6) of the third lens, and SF in [Equation 2] is L1-img / IH, where L1-img is the distance from the subject side surface of the first lens to the image side surface (S2) of the first lens and IH is the maximum height of the image plane).

2. In Paragraph 1, An electronic device in which the first lens has positive refractive power, the second lens has negative refractive power, the third lens has positive or negative refractive power, the fourth lens has positive refractive power, and the fifth lens has negative refractive power.

3. In Paragraph 1 or 2, An electronic device satisfying [Equation 3] following the above optical system [Equation 3] (Here, f(focal length) is the effective focal length of the optical system, CT1 is the sum of the center thicknesses of the first lens, the second lens, and the third lens, CT2 is the sum of the center thicknesses of the first lens, the second lens, the third lens, the fourth lens, and the fifth lens, SF is L1-img / IH, where L1-img is the distance from the subject side surface of the first lens to the image side surface of the first lens, and IH is the maximum height of the image plane).

4. In any one of paragraphs 1 to 3, The above optical system is an electronic device satisfying the following [Equation 4]. [Equation 4] (Here, f(focal length) is the effective focal length of the optical system, T1 is the distance from the subject side surface of the first lens to the image side surface of the third lens, T2 is the distance from the subject side surface of the first lens to the image side surface (S9) of the fifth lens, SF is L1-img / IH, where L1-img is the distance from the subject side surface of the first lens to the image side surface of the first lens, and IH is the maximum height of the image plane).

5. In any one of paragraphs 1 through 4, The above optical system is an electronic device satisfying the following [Equation 5]. [Equation 5] (Here, FOV is the field of view of the optical system, and CT1 is the sum of the center thicknesses of the first lens, the second lens, and the third lens).

6. In any one of paragraphs 1 through 5, The above optical system is an electronic device satisfying the following [Equation 6]. [Equation 6] 1.0 < f*CT1 < 1.8 (Here, f(focal length) is the effective focal length of the optical system, and CT1 is the sum of the center thicknesses of the first lens, the second lens, and the third lens).

7. In any one of paragraphs 1 through 6, The above optical system is an electronic device satisfying the following [Equation 7]. [Equation 7] (Here, CT1 is the sum of the center thicknesses of the first lens, the second lens, and the third lens, CT2 is the sum of the center thicknesses of the first lens, the second lens, the third lens, the fourth lens, and the fifth lens, and IH is the maximum height of the image plane).

8. In any one of paragraphs 1 through 7, The above optical system is an electronic device satisfying the following [Equation 8]. [Equation 8] (Here, T1 is the distance from the subject side surface of the first lens to the image side surface of the third lens, T2 is the distance from the subject side surface of the first lens to the image side surface of the fifth lens, and IH is the maximum height of the image plane).

9. In any one of paragraphs 1 through 8, An electronic device comprising at least two lenses among the first lens, the second lens, or the third lens, the material having a refractive index of 1.65 or higher.

10. In any one of paragraphs 1 through 9, The above optical system further comprises at least one of an aperture (sto) positioned facing the subject side surface of the first lens or positioned on or around at least one of the subject side surface (S3) or image side surface (S4) of the second lens.

11. In any one of paragraphs 1 through 10, An electronic device further comprising an actuator configured to move at least one of the image sensor or the lenses of the lens group along the optical axis (OI), and configured to perform a focus adjustment operation of the optical system by moving at least one of the image sensor or the lenses of the lens group along the optical axis (OI).

12. In any one of paragraphs 1 through 11, An electronic device further comprising an actuator configured to move at least one of the image sensor or the lenses of the lens group in a direction intersecting the optical axis (OI), and configured to perform optical image stabilization (OIS) of the optical system by moving at least one of the image sensor or the lenses of the lens group in a direction intersecting the optical axis (OI).

13. In any one of paragraphs 1 through 12, The above optical system is an electronic device satisfying the following [Equation 9]. [Equation 9] 0.3 < CT1 < 0.7 (Here, CT1 is the sum of the center thicknesses of the first lens, the second lens, and the third lens).

14. In any one of paragraphs 1 through 13, The above optical system is an electronic device satisfying the following [Equation 10]. [Equation 10] 0.3 < T1 < 2.0 (Here, T1 is the distance from the subject side surface of the first lens to the image side surface of the third lens).

15. In an optical system (300; 400; 500; 600), A lens group (G) comprising at least five lenses arranged sequentially along an optical axis (OI) in a direction from the object (O) side toward the image (I) side, including a first lens (L1) having positive refractive power, a second lens (L2) having negative refractive power, a third lens (L3) having positive or negative refractive power, a fourth lens (L4) having positive refractive power, and a fifth lens (L5) having negative refractive power; and It includes an image sensor comprising an image plane (img) on ​​which an image (I) is formed, and An electronic device satisfying the following [Equation 1] and [Equation 2] [Equation 1] 0.6 < f*T1 < 2.5 [Equation 2] SF < 0.55 (Here, f(focal length) in [Equation 1] is the effective focal length of the optical system and T1 is the distance from the subject side surface of the first lens to the image side surface of the third lens, and SF in [Equation 2] is L1-img / IH, where L1-img is the distance from the subject side surface of the first lens to the image side surface of the first lens and IH is the maximum height of the image plane).

Images