WO2015152462A1 - Ensemble objectif - Google Patents

Ensemble objectif Download PDF

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Publication number
WO2015152462A1
WO2015152462A1 PCT/KR2014/004887 KR2014004887W WO2015152462A1 WO 2015152462 A1 WO2015152462 A1 WO 2015152462A1 KR 2014004887 W KR2014004887 W KR 2014004887W WO 2015152462 A1 WO2015152462 A1 WO 2015152462A1
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WO
WIPO (PCT)
Prior art keywords
lens
refractive power
lens assembly
mobile terminal
lenses
Prior art date
Application number
PCT/KR2014/004887
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English (en)
Korean (ko)
Inventor
이동진
김학해
김종필
Original Assignee
엘지전자 주식회사
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Application filed by 엘지전자 주식회사 filed Critical 엘지전자 주식회사
Publication of WO2015152462A1 publication Critical patent/WO2015152462A1/fr

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
    • G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
    • G02B13/002—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface
    • G02B13/0045—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface having five or more lenses

Definitions

  • the present invention relates to a lens assembly, and more particularly to a lens assembly of a camera module for use in a mobile terminal.
  • Terminals may be divided into mobile / portable terminals and stationary terminals according to their mobility.
  • the mobile terminal may be further classified into a handheld terminal and a vehicle mounted terminal according to whether a user can directly carry it.
  • the functions of mobile terminals are diversifying. For example, data and voice communication, taking a picture and video with a camera, recording a voice, playing a music file through a speaker system, and outputting an image or video to a display unit.
  • Some terminals have an electronic game play function or a multimedia player function.
  • recent mobile terminals may receive multicast signals that provide visual content such as broadcasting, video, and television programs.
  • such a terminal is a multimedia player type having complex functions such as taking a picture or a video, playing a music or video file, playing a game or receiving a broadcast. Is implemented. In order to support and increase the function of such a terminal, it may be considered to improve the structural part and / or the software part of the terminal.
  • the camera module which occupies a considerable volume in the mobile terminal, requires a thin thickness. Accordingly, in order to make a slim camera, the size of the image sensor needs to be the same as or smaller than the existing one. However, since the resolution to be implemented is required to be increased, the pixel size of the image sensor is small to realize the high resolution. There is no choice but to lose. Therefore, the resolution of the lens must be high in order to sufficiently collect the light in the small pixels, but in order for the lens to provide sufficient resolution, a large number of lenses must be used.
  • Another object is to provide a lens assembly that can realize a high resolution bright image and a wide wide angle while slimming a camera module.
  • Another object is to provide a lens assembly capable of maintaining a high resolution and at the same time a high resolution bright image and a wide wide angle.
  • a first lens having a positive refractive power in order from the object side A second lens having negative refractive power; A third lens having negative refractive power; A fourth lens having positive refractive power; A fifth lens having positive refractive power; And a sixth lens having negative refractive power.
  • the first lens having a positive refractive power in order from the object side
  • the second lens having a negative refractive power
  • the third lens having a negative refractive power
  • a lens assembly including a fourth lens having a positive refractive power, a fifth lens having a positive refractive power, and a sixth lens having a negative refractive power; And an image sensor converting an optical signal incident from the lens assembly into an electrical signal.
  • FIG. 1A is a block diagram illustrating a mobile terminal associated with the present invention
  • FIGS. 1B and 1C are conceptual views of one example of a mobile terminal according to the present invention, viewed from different directions;
  • FIG. 2 is a diagram referred to describe a camera module of a mobile terminal related to the present invention
  • FIG. 3 is a view referred to for explaining the configuration of the lens assembly according to the first embodiment of the present invention.
  • FIG. 4 is a graph showing aberration characteristics of the lens assembly according to the first embodiment of the present invention.
  • FIG. 5 is a view referred to for explaining the configuration of the lens assembly according to the second embodiment of the present invention.
  • FIG. 6 is a graph showing aberration characteristics of the lens assembly according to the second embodiment of the present invention.
  • FIG. 7 is a view referred to for explaining the configuration of the lens assembly according to the third embodiment of the present invention.
  • FIG. 8 is a graph showing aberration characteristics of the lens assembly according to the third embodiment of the present invention.
  • FIG. 9 is a view for explaining a change in incident angle (CRA) according to a change in distance between a lens assembly and an image sensor.
  • CRA change in incident angle
  • the mobile terminal described herein includes a mobile phone, a smart phone, a laptop computer, a digital broadcasting terminal, a personal digital assistant, a portable multimedia player, a navigation, a slate PC , Tablet PCs, ultrabooks, wearable devices, such as smartwatches, glass glasses, head mounted displays, and the like. have.
  • FIG. 1A is a block diagram illustrating a mobile terminal according to the present invention
  • FIGS. 1B and 1C are conceptual views of one example of the mobile terminal, viewed from different directions.
  • the mobile terminal 100 includes a wireless communication unit 110, an input unit 120, a sensing unit 140, an output unit 150, an interface unit 160, a memory 170, a controller 180, and a power supply unit 190. ) May be included.
  • the components shown in FIG. 1A are not essential to implementing a mobile terminal, so a mobile terminal described herein may have more or fewer components than those listed above.
  • the wireless communication unit 110 of the components, between the mobile terminal 100 and the wireless communication system, between the mobile terminal 100 and another mobile terminal 100, or the mobile terminal 100 and the external server It may include one or more modules that enable wireless communication therebetween.
  • the wireless communication unit 110 may include one or more modules for connecting the mobile terminal 100 to one or more networks.
  • the wireless communication unit 110 may include at least one of the broadcast receiving module 111, the mobile communication module 112, the wireless internet module 113, the short range communication module 114, and the location information module 115. .
  • the input unit 120 may include a camera 121 or an image input unit for inputting an image signal, a microphone 122 for inputting an audio signal, an audio input unit, or a user input unit 123 for receiving information from a user. , Touch keys, mechanical keys, and the like.
  • the voice data or the image data collected by the input unit 120 may be analyzed and processed as a control command of the user.
  • the sensing unit 140 may include one or more sensors for sensing at least one of information in the mobile terminal, surrounding environment information surrounding the mobile terminal, and user information.
  • the sensing unit 140 may include a proximity sensor 141, an illumination sensor 142, an illumination sensor, a touch sensor, an acceleration sensor, a magnetic sensor, and gravity.
  • Optical sensors e.g. cameras 121), microphones (see 122), battery gauges, environmental sensors (e.g.
  • the mobile terminal disclosed herein may use a combination of information sensed by at least two or more of these sensors.
  • the output unit 150 is used to generate an output related to sight, hearing, or tactile sense, and includes at least one of a display unit 151, an audio output unit 152, a hap tip module 153, and an optical output unit 154. can do.
  • the display unit 151 forms a layer structure with or is integrally formed with the touch sensor, thereby implementing a touch screen.
  • the touch screen may function as a user input unit 123 that provides an input interface between the mobile terminal 100 and the user, and may also provide an output interface between the mobile terminal 100 and the user.
  • the interface unit 160 serves as a path to various types of external devices connected to the mobile terminal 100.
  • the interface unit 160 connects a device equipped with a wired / wireless headset port, an external charger port, a wired / wireless data port, a memory card port, and an identification module. It may include at least one of a port, an audio input / output (I / O) port, a video input / output (I / O) port, and an earphone port.
  • I / O audio input / output
  • I / O video input / output
  • earphone port an earphone port
  • the memory 170 stores data supporting various functions of the mobile terminal 100.
  • the memory 170 may store a plurality of application programs or applications driven in the mobile terminal 100, data for operating the mobile terminal 100, and instructions. At least some of these applications may be downloaded from an external server via wireless communication.
  • at least some of these application programs may exist on the mobile terminal 100 from the time of shipment for basic functions of the mobile terminal 100 (for example, a call forwarding, a calling function, a message receiving, and a calling function).
  • the application program may be stored in the memory 170 and installed on the mobile terminal 100 to be driven by the controller 180 to perform an operation (or function) of the mobile terminal.
  • the controller 180 In addition to the operation related to the application program, the controller 180 typically controls the overall operation of the mobile terminal 100.
  • the controller 180 may provide or process information or a function appropriate to a user by processing signals, data, information, and the like, which are input or output through the above-described components, or by driving an application program stored in the memory 170.
  • controller 180 may control at least some of the components described with reference to FIG. 1A in order to drive an application program stored in the memory 170. Furthermore, the controller 180 may operate by combining at least two or more of the components included in the mobile terminal 100 to drive the application program.
  • the power supply unit 190 receives power from an external power source and an internal power source under the control of the controller 180 to supply power to each component included in the mobile terminal 100.
  • the power supply unit 190 includes a battery, which may be a built-in battery or a replaceable battery.
  • At least some of the components may operate in cooperation with each other to implement an operation, control, or control method of the mobile terminal according to various embodiments described below.
  • the operation, control, or control method of the mobile terminal may be implemented on the mobile terminal by driving at least one application program stored in the memory 170.
  • the disclosed mobile terminal 100 includes a terminal body in the form of a bar.
  • the present invention is not limited thereto, and the present invention can be applied to various structures such as a watch type, a clip type, a glass type, or a folder type, a flip type, a slide type, a swing type, a swivel type, and two or more bodies which are coupled to be movable relative to each other.
  • a description of a particular type of mobile terminal may generally apply to other types of mobile terminals.
  • the terminal body may be understood as a concept that refers to the mobile terminal 100 as at least one aggregate.
  • the mobile terminal 100 includes a case (eg, a frame, a housing, a cover, etc.) forming an external appearance. As shown, the mobile terminal 100 may include a front case 101 and a rear case 102. Various electronic components are disposed in the internal space formed by the combination of the front case 101 and the rear case 102. At least one middle case may be additionally disposed between the front case 101 and the rear case 102.
  • a case eg, a frame, a housing, a cover, etc.
  • the mobile terminal 100 may include a front case 101 and a rear case 102.
  • Various electronic components are disposed in the internal space formed by the combination of the front case 101 and the rear case 102.
  • At least one middle case may be additionally disposed between the front case 101 and the rear case 102.
  • the display unit 151 may be disposed in front of the terminal body to output information. As shown, the window 151a of the display unit 151 may be mounted to the front case 101 to form a front surface of the terminal body together with the front case 101.
  • an electronic component may be mounted on the rear case 102.
  • Electronic components attachable to the rear case 102 include a removable battery, an identification module, a memory card, and the like.
  • the rear cover 102 may be detachably coupled to the rear case 102 to cover the mounted electronic component. Therefore, when the rear cover 103 is separated from the rear case 102, the electronic components mounted on the rear case 102 are exposed to the outside.
  • the rear cover 103 when the rear cover 103 is coupled to the rear case 102, a portion of the side surface of the rear case 102 may be exposed. In some cases, the rear case 102 may be completely covered by the rear cover 103 during the coupling. On the other hand, the rear cover 103 may be provided with an opening for exposing the camera 121b or the sound output unit 152b to the outside.
  • the cases 101, 102, and 103 may be formed by injecting a synthetic resin, or may be formed of a metal, for example, stainless steel (STS), aluminum (Al), titanium (Ti), or the like.
  • STS stainless steel
  • Al aluminum
  • Ti titanium
  • the mobile terminal 100 may be configured such that one case may provide the internal space, unlike the above example in which a plurality of cases provide an internal space for accommodating various electronic components.
  • the mobile terminal 100 of the unibody that the synthetic resin or metal from the side to the rear may be implemented.
  • the mobile terminal 100 may be provided with a waterproof portion (not shown) to prevent water from seeping into the terminal body.
  • the waterproof portion is provided between the window 151a and the front case 101, between the front case 101 and the rear case 102 or between the rear case 102 and the rear cover 103, and a combination thereof. It may include a waterproof member for sealing the inner space.
  • the mobile terminal 100 includes a display unit 151, first and second sound output units 152a and 152b, a proximity sensor 141, an illuminance sensor 142, an optical output unit 154, and first and second units.
  • the cameras 121a and 121b, the first and second manipulation units 123a and 123b, the microphone 122, the interface unit 160, and the like may be provided.
  • the display unit 151, the first sound output unit 152a, the proximity sensor 141, the illuminance sensor 142, and the light output unit may be disposed on the front surface of the terminal body.
  • the first camera 121a and the first operation unit 123a are disposed, and the second operation unit 123b, the microphone 122, and the interface unit 160 are disposed on the side of the terminal body.
  • the mobile terminal 100 in which the second sound output unit 152b and the second camera 121b are disposed on the rear surface of the mobile terminal 100 will be described as an example.
  • first manipulation unit 123a may not be provided on the front surface of the terminal body, and the second sound output unit 152b may be provided on the side of the terminal body instead of the rear surface of the terminal body.
  • the display unit 151 displays (outputs) information processed by the mobile terminal 100.
  • the display unit 151 may display execution screen information of an application program driven in the mobile terminal 100 or user interface (UI) and graphical user interface (GUI) information according to the execution screen information. .
  • UI user interface
  • GUI graphical user interface
  • the display unit 151 may include a liquid crystal display (LCD), a thin film transistor-liquid crystal display (TFT LCD), an organic light-emitting diode (OLED), and a flexible display (flexible display). display, a 3D display, or an e-ink display.
  • LCD liquid crystal display
  • TFT LCD thin film transistor-liquid crystal display
  • OLED organic light-emitting diode
  • flexible display flexible display
  • display a 3D display, or an e-ink display.
  • two or more display units 151 may exist according to an implementation form of the mobile terminal 100.
  • the plurality of display units may be spaced apart or integrally disposed on one surface of the mobile terminal 100, or may be disposed on different surfaces.
  • the display unit 151 may include a touch sensor that senses a touch on the display unit 151 so as to receive a control command by a touch method.
  • the touch sensor may sense the touch, and the controller 180 may generate a control command corresponding to the touch based on the touch sensor.
  • the content input by the touch method may be letters or numbers or menu items that can be indicated or designated in various modes.
  • the touch sensor is formed of a film having a touch pattern and disposed between the window 151a and the display (not shown) on the rear surface of the window 151a or directly patterned on the rear surface of the window 151a. May be Alternatively, the touch sensor may be integrally formed with the display. For example, the touch sensor may be disposed on a substrate of the display or provided in the display.
  • the display unit 151 may form a touch screen together with the touch sensor.
  • the touch screen may function as the user input unit 123 (see FIG. 1A).
  • the touch screen may replace at least some functions of the first manipulation unit 123a.
  • the first sound output unit 152a may be implemented as a receiver for transmitting a call sound to the user's ear, and the second sound output unit 152b may be a loud speaker for outputting various alarm sounds or multimedia reproduction sounds. It can be implemented in the form of).
  • a sound hole for emitting sound generated from the first sound output unit 152a may be formed in the window 151a of the display unit 151.
  • the present invention is not limited thereto, and the sound may be configured to be emitted along an assembly gap between the structures (for example, a gap between the window 151a and the front case 101).
  • an externally formed hole may be invisible or hidden for sound output, thereby simplifying the appearance of the mobile terminal 100.
  • the light output unit 154 is configured to output light for notifying when an event occurs. Examples of the event may include message reception, call signal reception, missed call, alarm, schedule notification, email reception, information reception through an application, and the like.
  • the controller 180 may control the light output unit 154 to end the light output.
  • the first camera 121a processes an image frame of a still image or a moving image obtained by the image sensor in a shooting mode or a video call mode.
  • the processed image frame may be displayed on the display unit 151 and stored in the memory 170.
  • the first and second manipulation units 123a and 123b may be collectively referred to as a manipulating portion as an example of the user input unit 123 manipulated to receive a command for controlling the operation of the mobile terminal 100. have.
  • the first and second manipulation units 123a and 123b may be adopted in any manner as long as the user is tactile manner such as touch, push, scroll, and the like while the user is tactile.
  • the first and second manipulation units 123a and 123b may be employed in such a manner that the first and second manipulation units 123a and 123b are operated without a tactile feeling by the user through proximity touch, hovering touch, or the like.
  • the first operation unit 123a is illustrated as being a touch key, but the present invention is not limited thereto.
  • the first manipulation unit 123a may be a mechanical key or a combination of a touch key and a push key.
  • the contents input by the first and second manipulation units 123a and 123b may be variously set.
  • the first operation unit 123a receives a command such as a menu, a home key, a cancellation, a search, etc.
  • the second operation unit 123b is output from the first or second sound output units 152a and 152b.
  • the user may receive a command such as adjusting the volume of the sound and switching to the touch recognition mode of the display unit 151.
  • a rear input unit (not shown) may be provided on the rear surface of the terminal body.
  • the rear input unit is manipulated to receive a command for controlling the operation of the mobile terminal 100, and the input contents may be variously set. For example, commands such as power on / off, start, end, scroll, etc., control of the volume of sound output from the first and second sound output units 152a and 152b, and the touch recognition mode of the display unit 151. Commands such as switching can be received.
  • the rear input unit may be implemented in a form capable of input by touch input, push input, or a combination thereof.
  • the rear input unit may be disposed to overlap the front display unit 151 in the thickness direction of the terminal body.
  • the rear input unit may be disposed at the rear upper end of the terminal body so that the user can easily manipulate the index body when the user grips the terminal body with one hand.
  • the present invention is not necessarily limited thereto, and the position of the rear input unit may be changed.
  • the rear input unit when the rear input unit is provided at the rear of the terminal body, a new type user interface using the same may be implemented.
  • the touch screen or the rear input unit described above replaces at least some functions of the first operation unit 123a provided in the front of the terminal body, the first operation unit 123a is not disposed on the front of the terminal body.
  • the display unit 151 may be configured with a larger screen.
  • the mobile terminal 100 may be provided with a fingerprint recognition sensor for recognizing a user's fingerprint, and the controller 180 may use fingerprint information detected through the fingerprint recognition sensor as an authentication means.
  • the fingerprint recognition sensor may be embedded in the display unit 151 or the user input unit 123.
  • the microphone 122 is configured to receive a user's voice, other sounds, and the like.
  • the microphone 122 may be provided at a plurality of locations and configured to receive stereo sound.
  • the interface unit 160 serves as a path for connecting the mobile terminal 100 to an external device.
  • the interface unit 160 may be connected to another device (eg, an earphone or an external speaker), a port for short-range communication (for example, an infrared port (IrDA Port), or a Bluetooth port (Bluetooth). Port), a wireless LAN port, or the like, or a power supply terminal for supplying power to the mobile terminal 100.
  • the interface unit 160 may be implemented in the form of a socket for receiving an external card such as a subscriber identification module (SIM) or a user identity module (UIM), a memory card for storing information.
  • SIM subscriber identification module
  • UIM user identity module
  • the second camera 121b may be disposed on the rear surface of the terminal body. In this case, the second camera 121b has a photographing direction substantially opposite to that of the first camera 121a.
  • the second camera 121b may include a plurality of lenses arranged along at least one line.
  • the plurality of lenses may be arranged in a matrix format.
  • Such a camera may be referred to as an 'array camera'.
  • the second camera 121b is configured as an array camera, images may be photographed in various ways using a plurality of lenses, and images of better quality may be obtained.
  • the flash 124 may be disposed adjacent to the second camera 121b.
  • the flash 124 shines light toward the subject when the subject is photographed by the second camera 121b.
  • the second sound output unit 152b may be additionally disposed on the terminal body.
  • the second sound output unit 152b may implement a stereo function together with the first sound output unit 152a and may be used to implement a speakerphone mode during a call.
  • the terminal body may be provided with at least one antenna for wireless communication.
  • the antenna may be built in the terminal body or formed in the case.
  • an antenna that forms part of the broadcast receiving module 111 (refer to FIG. 1A) may be configured to be pulled out from the terminal body.
  • the antenna may be formed in a film type and attached to the inner side of the rear cover 103, or may be configured such that a case including a conductive material functions as an antenna.
  • the terminal body is provided with a power supply unit 190 (see FIG. 1A) for supplying power to the mobile terminal 100.
  • the power supply unit 190 may include a battery 191 embedded in the terminal body or detachably configured from the outside of the terminal body.
  • the battery 191 may be configured to receive power through a power cable connected to the interface unit 160.
  • the battery 191 may be configured to enable wireless charging through a wireless charger.
  • the wireless charging may be implemented by a magnetic induction method or a resonance method (magnetic resonance method).
  • the rear cover 103 is coupled to the rear case 102 to cover the battery 191 to limit the detachment of the battery 191 and to protect the battery 191 from external shock and foreign matter.
  • the rear cover 103 may be detachably coupled to the rear case 102.
  • An accessory may be added to the mobile terminal 100 to protect the appearance or to assist or expand the function of the mobile terminal 100.
  • An example of such an accessory may be a cover or pouch that covers or accommodates at least one surface of the mobile terminal 100.
  • the cover or pouch may be configured to be linked with the display unit 151 to expand the function of the mobile terminal 100.
  • Another example of an accessory may be a touch pen for assisting or extending a touch input to a touch screen.
  • the configuration of the mobile terminal 100 according to the present invention has been described with reference to FIGS. 1A to 1C.
  • the configuration of the camera module used in the mobile terminal according to the present invention and the lens assembly mounted to the camera module will be described in detail.
  • FIG. 2 is a view referred to for explaining a camera module of a mobile terminal according to the present invention.
  • the camera module 121 includes a lens assembly 300, a lens barrel 210, an actuator 220, and an image sensor 230.
  • the camera module 121 is coupled to the printed circuit board (not shown) for processing the signal of the image sensor 230, the lens barrel 210 and the coil is wound around the It further includes a bobbin (not shown).
  • the lens assembly 300 is configured by arranging a plurality of lenses in a line along the optical axis, and is a device for refracting light so that a large amount of light can be collected from one point of a subject and collected at one point. At this time, the light running in a straight line from one point is gathered in one place while passing through the lens, and the light is gathered to form a single image. At this time, the distance between the image sensor 230 and the lens forming the focal length is focal length. Is called.
  • the lens barrel 210 serves as a housing for protecting the lens assembly 300, and moves in the optical axis direction according to the driving of the actuator 220.
  • the actuator 220 performs an auto focus (AF) function by moving the lens barrel 210 and the bobbin along the optical axis direction through an electromagnetic force using a coil.
  • the actuator 220 may be configured as a voice coil motor (VCM).
  • the image sensor 230 is disposed spaced apart from the lens assembly 300 and performs a function of converting an optical signal input through the lens assembly 300 into an electrical signal.
  • a charge coupled device (CCD) or a complementary metal oxide semiconductor (CMOS) may be used as the image sensor 230.
  • FIG. 3 is a view referred to for explaining the configuration of the lens assembly according to the first embodiment of the present invention.
  • the thickness, size, and shape of the lens are somewhat exaggerated for explanation, and the spherical or aspherical shape is only presented as an example and is not limited thereto.
  • the lens assembly 300 may include an aperture (S top , 305), a first lens 310, a second lens 320, and a third in order from an object side.
  • the lens 330, the fourth lens 340, the fifth lens 350, the sixth lens 360, the infrared filter 370, and the image sensor 230 are disposed.
  • the light corresponding to the image information of the subject includes an aperture 305, a first lens 310, a second lens 320, a third lens 330, a fourth lens 340, a fifth lens 350, and a third lens. 6 passes through the lens 360 and the infrared filter 370 to enter the image sensor 230.
  • the iris S top 305 is positioned at the front of the lens assembly 300 (ie, the front of the first lens) to adjust the amount of light incident on the optical system.
  • the aperture 305 may be disposed between the lens and the lens.
  • the first to sixth lenses 310, 320, 330, 340, 350, and 360 may be formed of a plastic material having a predetermined refractive index. Therefore, when all the lenses constituting the lens assembly 300 are made of a plastic material, not only can reduce the manufacturing cost of the lens assembly 300, but also mass production is possible.
  • first to sixth lenses 310, 320, 330, 340, 350, and 360 may use aspherical lenses on at least one surface or both sides thereof, thereby improving the resolution of the lens and taking advantage of excellent aberration characteristics. Can be.
  • Object Side refers to the surface of the lens toward the object side with respect to the optical axis (Zo), referred to as "Image Side” Means a surface of the lens facing the imaging surface with respect to the optical axis Zo.
  • the first lens 310 has a positive refractive power, and the object side surface S1 is convex.
  • the aperture 305 is positioned on the object side surface S1 of the first lens 310.
  • the second lens 320 has a negative refractive power and the image side surface S4 is concave.
  • the third lens 330 has a negative refractive power, and the object side surface S5 is concave.
  • the lenses having negative refractive power are continuously disposed at the second and third positions from the object side, thereby increasing the size of the chief ray angle (CRA) incident on the image pickup surface, thereby increasing the size of the lens assembly 300 and the image. In spite of the short distance between the sensors 230, it is possible to obtain an image of sufficient size.
  • CRA chief ray angle
  • a high refractive plastic material having a refractive index of 1.6 or more may be used for the second and third lenses 320 and 330.
  • the fourth lens 340 and the fifth lens 350 have a positive refractive power
  • the sixth lens 360 has a negative refractive power.
  • the fourth lens 340 is convexly formed on the image side surface S8.
  • the fifth and sixth lenses 350 and 360 have an aspherical surface in which the object side surfaces S9 and S11 and the image side surfaces S10 and S12 both have inflection points.
  • the lens assembly 300 having the structure of the positive and negative positive and negative (PNNPPN, +-++-) has a large number of lenses having negative refractive power, thereby forming an overall slim structure.
  • the lens assembly 300 increases the size of the incident angle CRA incident on the imaging surface by using the second, third, and sixth lenses 320, 330, and 360 having negative refractive power. Accordingly, high resolution can be maintained even in a slim structure having a short distance between the lens assembly 300 and the image sensor 230.
  • an incident angle CRA applied to the image pickup surface of the lens assembly must be increased.
  • lenses having negative refractive power must be appropriately adopted in the lens assembly 300 to spread light incident from the object side onto the image sensor 230.
  • the infrared filter 370 blocks the radiant heat emitted from the external light from being transmitted to the image sensor 230. In addition, the infrared filter 370 transmits visible light and reflects infrared rays to the outside.
  • the infrared filter 370 may be configured in the form of a coating film, and may be attached to the image side surface S12 of the sixth lens 360.
  • the image sensor 230 converts an optical signal incident through the aperture 305, the first to sixth lenses 310, 320, 330, 340, 350, and 360, and the infrared filter 370 into an electrical signal.
  • conditional expressions described below are preferred embodiments for enhancing the effect of the lens assembly, and the present invention is not necessarily composed of the following conditions. For example, even if only the conditional expressions of some of the conditional expressions described below are satisfied, the lens configuration of the present invention may have a synergistic effect.
  • K 1 , K 2 , K 3 , K 4 , K 5 , K 6 refractive power of the first to sixth lenses
  • K t Refractive power of the entire lens.
  • Conditional Expressions 1 to 6 define refractive power of the first to sixth lenses 320, 330, 340, 350, 360, and 370 of the lens assembly according to the exemplary embodiments of the present invention. Accordingly, the first to sixth lenses 320, 330, 340, 350, 360, and 370 of the lens assembly according to the present invention have refractive power with appropriate spherical aberration correction and appropriate chromatic aberration according to conditional expressions 1 to 6.
  • the aspherical surface mentioned in the embodiments of the present invention is obtained from the known Equation 1, and the 'E and subsequent numbers used in the Conic constant ⁇ and the aspherical coefficients A, B, C, D, E, and F Represents a power of 10.
  • E + 01 represents 10 1
  • E-02 represents 10 ⁇ 2 .
  • A, B, C, D, E, F Aspheric coefficients of each order.
  • Table 1 below shows first to sixth lenses of the lens assembly according to the first embodiment of the present invention.
  • the first to sixth lenses are designed to satisfy the above conditional expressions.
  • ) for the first to sixth lenses are 1.03, 0.61, 0.21, 0.34, 1.24, and 1.65, which satisfies the conditional expressions 1 to 6 described above. .
  • the F-number of the lens assembly 300 according to the first embodiment of the present invention exhibits a performance of 2.1829
  • the half field of view (HFOV) exhibits a performance of 40.6588 degrees.
  • the lower the value of the F-number the higher the brightness of the lens. Therefore, since the F-number of the lens assembly 300 according to the first embodiment has a value of 2.1829, it can be seen that a bright image can be obtained through the lens assembly 300.
  • Half-angle of view represents one-half of the field of view of the scene captured by the camera lens. Therefore, since the HFOV of the lens assembly 300 according to the first embodiment is 40.6588 degrees, it can be confirmed that a wide wide angle can be secured through the lens assembly 300.
  • Table 2 shows the values of the aspherical coefficients of each lens forming the lens assembly according to the embodiment of Table 1.
  • FIG. 4 is a graph illustrating aberration characteristics of the lens assembly according to the first embodiment of the present invention, in which longitudinal spherical aberration, astigmatic field curves, and distortion are performed in order from the left. It is a graph measured.
  • the Y axis means an image size
  • the X axis means a focal length (mm unit) and a distortion degree (% unit).
  • FIG. 5 is a view referred to explain the configuration of a lens assembly according to a second embodiment of the present invention.
  • the lens assembly 500 may include an aperture (S top , 505), a first lens 510, a second lens 520, and a third in order from an object side.
  • the lens 530, the fourth lens 540, the fifth lens 550, the sixth lens 560, the infrared filter 570, and the image sensor 230 are disposed.
  • the iris S top 505 is positioned at the front of the lens assembly 300 (ie, the front of the first lens) to adjust the amount of light incident on the optical system.
  • the diaphragm 505 may be disposed between the lens and the lens.
  • the first to sixth lenses 510, 520, 530, 540, 550, and 560 may be formed of a plastic material having a predetermined refractive index.
  • the first to sixth lenses 510, 520, 530, 540, 550, and 560 may use aspherical lenses on at least one surface or both sides thereof.
  • the first lens 510 has a positive refractive power (or refractive power), and the object side surface S1 is convex.
  • the aperture 505 is positioned on the object side surface S1 of the first lens 510.
  • the second lens 520 has a negative refractive power, and the image side surface S4 is concave.
  • the third lens 530 has a negative refractive power, and the object side surface S5 is concave.
  • the lenses having negative refractive power are continuously disposed at the second and third positions from the object side, thereby increasing the magnitude of the chief ray angle (CRA) incident on the image pickup surface, thereby increasing the size of the lens assembly 500 and the image. In spite of the short distance between the sensors 230, it is possible to obtain an image of sufficient size.
  • CRA chief ray angle
  • a high refractive plastic material having a refractive index of 1.6 or more may be used for the second and third lenses 520 and 530.
  • the fourth lens 540 and the fifth lens 550 have positive refractive power, and the sixth lens 560 has negative refractive power.
  • the image side surface S8 is convex in the fourth lens 540.
  • the fifth lens 550 has a meniscus shape in which the image side surface S10 is convex.
  • the sixth lens 560 has an aspherical surface in which both the object side surface S11 and the image side surface S12 have inflection points.
  • the lens assembly 500 having the structure of the positive and negative positive and negative (PNNPPN, +-++-) has a large number of lenses having negative refractive power, thereby forming an overall slim structure.
  • the lens assembly 500 increases the size of the incident angle CRA incident on the imaging surface by using the second, third, and sixth lenses 520, 530, and 560 having negative refractive power. Accordingly, high resolution can be maintained even in a slim structure having a short distance between the lens assembly 500 and the image sensor 230.
  • the infrared filter 570 blocks the radiant heat emitted from the external light from being transmitted to the image sensor 230. In addition, the infrared filter 570 transmits visible light and reflects infrared rays to the outside.
  • the image sensor 230 converts an optical signal incident through the aperture 505, the first to sixth lenses 510, 520, 530, 540, 550, and 560 and the infrared filter 570 into an electrical signal.
  • Table 3 below shows first to sixth lenses of the lens assembly according to the second embodiment of the present invention.
  • the first to sixth lenses are designed to satisfy the above conditional expressions.
  • ) for the first to sixth lenses are 1.07, 0.42, 0.30, 0.36, 0.99, and 1.53, which satisfy the above-described conditional expressions 1 to 6. .
  • the F-number of the lens assembly 500 according to the second embodiment of the present invention exhibits a performance of 1.8915, and the half angle of view (HFOV) shows a performance of 40.4317 degrees. Therefore, it can be seen that a bright image and a wide wide angle can be obtained through the lens assembly according to the present invention.
  • HFOV half angle of view
  • Table 4 shows the values of the aspherical coefficients of each lens forming the lens assembly according to the embodiment of Table 3.
  • FIG. 6 is a graph illustrating aberration characteristics of a lens assembly according to a second exemplary embodiment of the present invention, in which longitudinal spherical aberration, astigmatic field curves, and distortion are performed in order from the left. It is a graph measured.
  • the Y axis denotes the size of the image
  • the X axis denotes a focal length (mm unit) and a distortion degree (% unit).
  • FIG. 7 is a diagram referred to describe a configuration of a lens assembly according to a third exemplary embodiment of the present disclosure.
  • the lens assembly 700 may include an aperture (S top , 705), a first lens (710), a second lens (720), and a third in order from an object side.
  • the lens 730, the fourth lens 740, the fifth lens 750, the sixth lens 760, the infrared filter 770, and the image sensor 230 are disposed.
  • the iris S top 705 is positioned at the front of the lens assembly 700 (ie, the front of the first lens) to adjust the amount of light incident on the optical system.
  • the aperture 705 may be disposed between the lens and the lens.
  • the first to sixth lenses 710, 720, 730, 740, 750, and 760 may be formed of a plastic material having a predetermined refractive index.
  • the first to sixth lenses 710, 720, 730, 740, 750, and 760 may use aspherical lenses on at least one surface or both sides thereof.
  • the first lens 710 has a positive refractive power, and the object side surface S1 is convex.
  • An aperture 705 is positioned on the object side surface S1 of the first lens 710.
  • the second lens 720 has a negative refractive power, and the image side surface S4 is concave.
  • the third lens 730 has negative refractive power, and the object side surface S5 is concave.
  • the lens having the negative refractive power is continuously disposed at the second and third positions from the object side, thereby increasing the magnitude of the chief ray angle (CRA) incident on the imaging surface, thereby increasing the lens assembly 700 and the image.
  • CRA chief ray angle
  • a high refractive plastic material having a refractive index of 1.6 or more may be used for the second and third lenses 720 and 730. Can be.
  • the fourth lens 740 and the fifth lens 750 have a positive refractive power, and the sixth lens 760 has a negative refractive power.
  • the fourth lenses 740 are formed with convex images S8 and S10.
  • the object side surface S9 is concave
  • the image side surface S10 is convex.
  • the sixth lens 760 has an aspherical surface in which both the object side surface S11 and the image side surface S12 have an inflection point.
  • the lens assembly 700 having the structure of the positive and negative positive and negative (PNNPPN, +-++-) has a large number of lenses having negative refractive power, thereby forming an overall slim structure.
  • the lens assembly 700 increases the size of the incident angle CRA incident on the imaging surface by using the second, third, and sixth lenses 720, 730, and 760 having negative refractive power. Accordingly, high resolution can be maintained even in a slim structure having a short distance between the lens assembly 700 and the image sensor 230.
  • the infrared filter 770 blocks the radiant heat emitted from the external light from being transmitted to the image sensor 230. In addition, the infrared filter 770 transmits visible light and reflects infrared light to the outside.
  • the image sensor 230 converts an optical signal incident through the aperture 705, the first to sixth lenses 710, 720, 730, 740, 750, and 760, and the infrared filter 770 into an electrical signal.
  • Table 5 shows first to sixth lenses of the lens assembly according to the third embodiment of the present invention.
  • the first to sixth lenses are designed to satisfy the above conditional expressions.
  • ) for the first to sixth lenses correspond to the above conditional expressions 1 to 6 as 1.00, 0.50, 0.27, 0.46, 1.59, and 1.99. .
  • the F-number of the lens assembly 700 according to the third embodiment of the present invention exhibits the performance of 2.0513, and the half angle of view (HFOV) exhibits the performance of 42.0589 degrees. Therefore, it can be seen that a bright image and a wide wide angle can be obtained through the lens assembly 700 according to the present invention.
  • Table 6 shows the values of the aspherical coefficients of each lens forming the lens assembly according to the embodiment of Table 5.
  • FIG. 8 is a graph illustrating aberration characteristics of a lens assembly according to a third embodiment of the present invention, in which longitudinal spherical aberration, astigmatic field curves, and distortion are performed in order from the left. It is a graph measured.
  • the Y axis denotes the size of the image
  • the X axis denotes a focal length (mm unit) and a distortion degree (% unit).
  • the lens assembly according to the preferred embodiment of the present invention can realize a high resolution bright image and a wide wide angle while slimming the camera module.
  • the lens assembly can realize a high resolution bright image and a wide wide angle while maintaining high resolution.
  • the present invention described above can be embodied as computer readable codes on a medium in which a program is recorded.
  • the computer-readable medium includes all kinds of recording devices in which data that can be read by a computer system is stored. Examples of computer-readable media include hard disk drives (HDDs), solid state disks (SSDs), silicon disk drives (SDDs), ROMs, RAMs, CD-ROMs, magnetic tapes, floppy disks, optical data storage devices, and the like. This also includes implementations in the form of carrier waves (eg, transmission over the Internet).
  • the computer may include the controller 180 of the terminal. Accordingly, the above detailed description should not be construed as limiting in all aspects and should be considered as illustrative. The scope of the invention should be determined by reasonable interpretation of the appended claims, and all changes within the equivalent scope of the invention are included in the scope of the invention.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Lenses (AREA)

Abstract

La présente invention concerne un ensemble objectif d'un module d'appareil de prise de vues comprenant, dans l'ordre à partir du côté objet, une première lentille ayant une puissance de réfraction positive (+), une deuxième lentille ayant une puissance de réfraction négative (-), une troisième lentille ayant une puissance de réfraction négative (-), une quatrième lentille ayant une puissance de réfraction positive (+), une cinquième lentille ayant une puissance de réfraction positive (+), et une sixième lentille ayant une puissance de réfraction négative (-).
PCT/KR2014/004887 2014-04-01 2014-06-02 Ensemble objectif WO2015152462A1 (fr)

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KR10-2014-0038798 2014-04-01

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CN106814439A (zh) * 2015-12-01 2017-06-09 先进光电科技股份有限公司 光学成像系统
CN111025543A (zh) * 2019-12-23 2020-04-17 瑞声通讯科技(常州)有限公司 摄像光学镜头
CN111929872A (zh) * 2020-09-21 2020-11-13 常州市瑞泰光电有限公司 摄像光学镜头
WO2021008232A1 (fr) * 2019-07-12 2021-01-21 浙江舜宇光学有限公司 Lentille d'imagerie optique
CN112255771A (zh) * 2020-12-21 2021-01-22 诚瑞光学(苏州)有限公司 摄像光学镜头
CN112781839A (zh) * 2020-12-30 2021-05-11 森思泰克河北科技有限公司 一种透镜性能测试系统
CN112904535A (zh) * 2021-02-07 2021-06-04 浙江舜宇光学有限公司 摄像镜头组
US11156803B2 (en) 2018-09-26 2021-10-26 Largan Precision Co., Ltd. Imaging optical system, image capturing unit and electronic device

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WO2010077050A2 (fr) * 2008-12-29 2010-07-08 주식회사 나노포토닉스 Objectif hypergone
KR20120033866A (ko) * 2010-09-30 2012-04-09 삼성전기주식회사 렌즈시스템
WO2012157996A2 (fr) * 2011-05-18 2012-11-22 엘지이노텍 주식회사 Lentille avec variations de l'indice de réfraction, et module de caméra la comprenant
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WO2010077050A2 (fr) * 2008-12-29 2010-07-08 주식회사 나노포토닉스 Objectif hypergone
KR20120033866A (ko) * 2010-09-30 2012-04-09 삼성전기주식회사 렌즈시스템
WO2012157996A2 (fr) * 2011-05-18 2012-11-22 엘지이노텍 주식회사 Lentille avec variations de l'indice de réfraction, et module de caméra la comprenant
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Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106814439A (zh) * 2015-12-01 2017-06-09 先进光电科技股份有限公司 光学成像系统
CN106814439B (zh) * 2015-12-01 2019-12-27 先进光电科技股份有限公司 光学成像系统
US11156803B2 (en) 2018-09-26 2021-10-26 Largan Precision Co., Ltd. Imaging optical system, image capturing unit and electronic device
WO2021008232A1 (fr) * 2019-07-12 2021-01-21 浙江舜宇光学有限公司 Lentille d'imagerie optique
CN111025543A (zh) * 2019-12-23 2020-04-17 瑞声通讯科技(常州)有限公司 摄像光学镜头
CN111929872A (zh) * 2020-09-21 2020-11-13 常州市瑞泰光电有限公司 摄像光学镜头
CN111929872B (zh) * 2020-09-21 2021-01-05 常州市瑞泰光电有限公司 摄像光学镜头
JP2022051650A (ja) * 2020-09-21 2022-04-01 ジョウシュウシ レイテック オプトロニクス カンパニーリミテッド 撮像光学レンズ
CN112255771A (zh) * 2020-12-21 2021-01-22 诚瑞光学(苏州)有限公司 摄像光学镜头
WO2022134183A1 (fr) * 2020-12-21 2022-06-30 诚瑞光学(深圳)有限公司 Lentille optique photographique
CN112781839A (zh) * 2020-12-30 2021-05-11 森思泰克河北科技有限公司 一种透镜性能测试系统
CN112904535A (zh) * 2021-02-07 2021-06-04 浙江舜宇光学有限公司 摄像镜头组

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