WO2007073691A1 - Systeme de saisie d'images et dispositif de focalisation - Google Patents

Systeme de saisie d'images et dispositif de focalisation Download PDF

Info

Publication number
WO2007073691A1
WO2007073691A1 PCT/CN2006/003605 CN2006003605W WO2007073691A1 WO 2007073691 A1 WO2007073691 A1 WO 2007073691A1 CN 2006003605 W CN2006003605 W CN 2006003605W WO 2007073691 A1 WO2007073691 A1 WO 2007073691A1
Authority
WO
WIPO (PCT)
Prior art keywords
hole
carrier
optical axis
focusing device
base
Prior art date
Application number
PCT/CN2006/003605
Other languages
English (en)
Chinese (zh)
Inventor
Pao-Chyuan Chen
Original Assignee
New Ken Technologies Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by New Ken Technologies Co., Ltd. filed Critical New Ken Technologies Co., Ltd.
Publication of WO2007073691A1 publication Critical patent/WO2007073691A1/fr

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
    • G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
    • G02B7/08—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification adapted to co-operate with a remote control mechanism
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B13/00—Viewfinders; Focusing aids for cameras; Means for focusing for cameras; Autofocus systems for cameras
    • G03B13/32—Means for focusing
    • G03B13/34—Power focusing
    • G03B13/36—Autofocus systems
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B3/00—Focusing arrangements of general interest for cameras, projectors or printers
    • G03B3/10—Power-operated focusing

Definitions

  • the invention relates to an image capturing system and a focusing device thereof, in particular to a voice coil motor
  • General digital imaging products such as camera phones, digital cameras or video cameras, have been used as important tools for recording images.
  • an image capture device is included to convert optical images into digital images. Image signal.
  • an objective lens module and an image sensing module (such as CCD, CMOS) are usually included.
  • a focus actuator is needed to drive the objective lens module as a parallel objective optical axis. The focus offset correction allows the optical image to be properly focused on the image sensing module.
  • Another object of the present invention is to provide an image capturing system which is low in cost and high in magnetic energy usage.
  • the focusing device of the present invention includes a carrier, a coil assembly and a magnet unit.
  • the carrier is provided for an objective and defines an optical axis through the objective.
  • the coil assembly is coupled to the carrier and the coil assembly defines an accommodation space.
  • the magnet unit is disposed in the accommodating space, and the magnet unit connects the two magnets to each other by using a magnetic conductive plate, and the polarities of the opposing faces of the two magnets are the same, wherein the magnetic field of the magnetism changes the direction of the magnetic lines generated by the magnet substantially opposite to the coil group.
  • the winding direction is vertical, and the coil group and the carrier are moved in the extending direction of the optical axis by changing the current passing through the coil group.
  • the image capturing system of the present invention comprises an objective lens, an image sensing module and a focusing device. Define an optical axis through the objective lens.
  • the image sensing module receives the image beam passing through the objective lens.
  • the focusing device includes a carrier, a coil set and a magnet unit.
  • the bearing seat is provided for the objective lens, the coil group is connected with the carrier, and the coil group defines an accommodating space, the magnet unit is disposed in the accommodating space, and the magnet unit connects the two magnets to each other by using a magnetic conductive plate, and the two magnets face each other
  • the polarities are the same, wherein the direction of the magnetic lines of force generated by the magnetically permeable plate is substantially perpendicular to the winding direction of the coil assembly, and the current passing through the coil assembly is changed to move the coil assembly and the carrier in the direction in which the optical axis extends.
  • FIG. 1 is an exploded perspective view showing a preferred embodiment of the image capturing system of the present invention
  • Figure 2 is a plan view of a preferred embodiment
  • Figure 3 is a rear elevational view of the preferred embodiment
  • Figure 4 is a cross-sectional view taken along line I - 1 of Figure 3;
  • Figure 5 is a cross-sectional view taken along line ⁇ - ⁇ in Figure 3;
  • Figure 6 is a cross-sectional view taken along line ⁇ - ⁇ in Figure 2;
  • Figure 7 is a cross-sectional view taken along line IV-IV of Figure 2;
  • Figure 8 is a schematic view showing a magnet unit and a coil assembly
  • Figure 9 is a schematic view showing that the magnet unit includes a three-dimensional magnet and a two-conducting magnetic plate.
  • the list of parts represented by each label is as follows:
  • a preferred embodiment of the image capture system of the present invention includes an objective lens 2, an image sensing module 3 and a focusing device 4, and defines an optical axis 5 through the objective lens 2.
  • the focusing device 4 includes an upper cover 41, a carrier 42, a base 43, a coil assembly 44, a magnet unit 45, a circuit board 46, and a plurality of elastic conductors 47.
  • the base 43 has a bottom wall 431 and a side wall 432 extending upward from the periphery of the bottom wall 431.
  • the bottom wall 431 defines a hole 433, and the base 43 is provided.
  • the upper cover 41 and the magnet unit 45 are disposed, and the upper cover 41 is disposed on the top edge of the side wall 432 of the base 43 corresponding to the base 43 to cover the carrier 42, the coil assembly 44 and the magnet unit 45.
  • a hole 411 is defined in the base 43 and at a position corresponding to the hole 433 of the base 43 of the upper cover 41.
  • the carrier 42 has a body 421, a hole 422 formed in the body 421, and a plurality of terminals 423 on both sides of the body 421.
  • the objective lens 2 is disposed on the carrier 42 through the hole 422, including but not limited to screwing.
  • the two ends of the coil set 44 are respectively connected to the terminal 423 of the carrying base 42 , and the coil set 44 defines an accommodating space 441 for the magnet unit 45 , and the bottom of the magnet unit 45 can be fitted.
  • the magnet unit 45 On the bottom wall 431 of the base 43 and the magnet unit 45 has two magnets 451 disposed above and below and a magnetic conductive plate 452 interposed between the two magnets 451, the three of which form a sandwich-like structure, and the surface of the magnetic conductive plate 452
  • the vertical optical axis 5, and the opposite faces of the upper and lower magnets 451 have the same polarity. It should be noted that the magnet unit 45 is spaced apart from the coil assembly 44 by a fixed distance, that is, the magnet unit 45 is not in contact with the coil group 44, and The coil group 44 is wound in the direction perpendicular to the optical axis 5 in the direction of the line.
  • the coil group 44 must be surrounded around the magnetic conductive plate 452, the thickness of the magnetic conductive plate 452 in the direction of the optical axis 5 is defined as t, the moving range of the winding group 44 in the optical axis 5 direction is s, and the winding group 44 is along the optical axis 5.
  • the winding height of the direction is h, and in order to make the amount of movement (s) linear with the current in the coil group 44, the coil group 44 must cover or cover the thickness of the magnetic conductive plate 452 in the range of movement in the optical axis direction 5.
  • the circuit board 46 is fixed on the outer wall surface of the side wall 432 of the base 43.
  • the elastic conductor 47 has an elongated shape, one end is fixed to the circuit board 46, and the other end extends into the base 43 to be electrically connected to the terminal 423 of the carrier 42. (such as welding), the elastic conductor 47 can support the carrier 42 and the coil assembly 44 in the base 43 , and the side wall 432 of the base 43 for the elastic conductor 47 to pass through the corresponding recessed recess space 434 .
  • the image sensing module 3 includes a charge coupled component 31 (CCD or CMOS) and a flexible circuit board 32 (FPC).
  • the flexible circuit board 32 is located under the base 43 and the circuit board 46, and the charge coupled component 31 is disposed on the The flexible circuit board 32 has a position corresponding to the hole 433 in the bottom wall 431 of the base 43.
  • the objective lens 2 is disposed on the hole 422 of the carrier 42, and the aperture of the hole 411 of the upper cover 41 is larger than the diameter of the objective lens 2, so that the objective lens 2 can move up and down in the hole 411 of the upper cover 41.
  • the hole 411 of the upper cover 41, the hole 422 of the carrier 42 and the hole 433 of the base 43 are located on the optical axis 5, that is, the three directions are the same as the direction of the optical axis 5 (focus direction), thereby, the image After the light beam enters the objective lens 3, it can pass through the hole 411 of the upper cover 41, the hole 422 of the carrier 42 and the hole 433 of the base 43 in sequence, and finally hit the CCD 31.
  • the magnet unit 45 is disposed between the base 43 and the upper cover 41.
  • the coil assembly 44 is disposed in a box and the stone unit 45 is disposed in the frame, the coil assembly 44 is coupled to the carrier 42, and the coil assembly 44 is
  • the carrier 42 is supported by the elastic conductor 47 and suspended on the circuit board 46, and the circuit board 46 is mounted on the base 43.
  • the elastic conductor 47 may be made of a copper alloy, such as Beryllium Copper.
  • the W elastic conductor 47 can input current to the coil group 44 through the circuit board 46, and the magnet unit 45 has a sandwich structure (refer to FIG. 8), that is, the magnetic conductive plate 452 connects the two magnets 451 to each other, and the magnetic conductive plate 452 is plated.
  • the vertical optical axis 5 and the material of the magnetic conductive plate 452 include, but not limited to, a silicon steel plate or a carbon steel plate for changing the direction of the magnetic field and making the magnetic field uniform.
  • the magnet 451 faces the N-pole, and the magnet unit 45 is the uppermost and most The lower surface is the S pole, and the coil group 44 is located beside the magnetic conductive plate 452.
  • the right side of Fig. 8 indicates that the coil current enters the paper surface, and the left side of Fig. 8 indicates that the coil current passes through the paper surface, and is affected by the magnetic conductive plate 452, two magnets.
  • the direction of the magnetic field lines generated by the magnetic field 452 is substantially perpendicular to the winding direction of the coil assembly 44.
  • the direction of the force of the coil assembly 44 is upward. If the current direction is changed, that is, FIG. On the right side, the coil current is turned out of the paper surface, and the left side of FIG. 8 is changed to the coil current entering the paper surface, and the coil group 44 is biased in the downward direction. Therefore, the coil group 44 can be changed by changing the current passing through the coil group 44. And the carrier 42 along the light 5 extending in the direction of movement, in order to achieve the second focus correction in the optical axis direction of the objective lens 5.
  • the magnet unit 45 is not limited to the two magnets 451 and one magnetic conductive plate 452.
  • the magnet unit 45 may further include a three magnet 451 and two magnetic conductive plates 452, and the magnetic conductive plate 452 is also the same. Between two magnets, the magnetic plate 452 is perpendicular to the optical axis 5, and the magnets 451 have the same polarity on the opposite side, that is, as shown in FIG. 9, the upper surface of the two magnets 451 is N pole, and the lower two magnets face each other. The S pole is also provided.
  • the coil group 44 can also be provided with two coils, and the currents of the upper and lower coils are opposite to each other, and are affected by the magnetic conductive plate 452.
  • the magnetic lines of force generated by the two magnets 451 are substantially changed by the magnetic conductive plate 452.
  • the coil group 44 is perpendicular to the winding direction, whereby the current passing through the coil group 44 is changed to move the coil group 44 and the carrier 42 in the extending direction of the optical axis 5 to achieve focus correction of the objective lens 2 in the direction of the optical axis 5.
  • the number of the magnet 451 and the magnetic conductive plate 452 is merely illustrative. In essence, the scope of the present invention includes n magnets 451 and (n-1) magnetic plates 452, wherein n is greater than or equal to 2.
  • a protective cover 6 is also disposed outside the objective lens 2 for closing the hole 433 of the upper cover 41 and protecting the objective lens 2.
  • the image capturing system of the present invention not only constructs a single cylinder, is low in cost, and is thinner, but also provides a sandwich structure magnet unit 45, which changes and homogenizes the magnetic field through the magnetic conductive plate 452, and borrows The input current is changed to achieve the movement of the drive coil group 44, the carrier 42 and the objective lens 2 in the direction of the optical axis 5 (focusing direction) to correct the focus.

Abstract

Un dispositif de focalisation comprend un support porteur (42), un ensemble bobine (44) et une unité d'aimant (45). Le support porteur est doté d'un orifice de montage (422) pour un objectif (2) et d'une chambre (441), entourée par la bobine, de réception de l'unité d'aimants. L'unité d'aimants est composée de deux aimants (451, 451) et d'une plaque conductrice d'aimant (452). La plaque est en sandwich entre deux aimants dont les polarités sont identiques sur les côtés opposés. La plaque change les directions de la ligne de force magnétique générées par les aimants et les directions changées sont pratiquement perpendiculaires à la direction du fil enrouleur de l'ensemble bobine. La direction actuelle de l'ensemble bobine change de sorte que l'ensemble bobine se déplace dans la direction d'extension de l'axe optique de l'objectif.
PCT/CN2006/003605 2005-12-26 2006-12-26 Systeme de saisie d'images et dispositif de focalisation WO2007073691A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CNB2005101376446A CN100523981C (zh) 2005-12-26 2005-12-26 影像撷取系统及其对焦装置
CN200510137644.6 2005-12-26

Publications (1)

Publication Number Publication Date
WO2007073691A1 true WO2007073691A1 (fr) 2007-07-05

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Application Number Title Priority Date Filing Date
PCT/CN2006/003605 WO2007073691A1 (fr) 2005-12-26 2006-12-26 Systeme de saisie d'images et dispositif de focalisation

Country Status (2)

Country Link
CN (1) CN100523981C (fr)
WO (1) WO2007073691A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107153246A (zh) * 2017-07-04 2017-09-12 湖北欧亚高新科技股份有限公司 一种激光头物镜装配点胶一体机
CN112835170A (zh) * 2019-11-25 2021-05-25 河源友华微机电科技有限公司 微型相机的三轴电磁驱动装置
CN113970868A (zh) * 2020-07-22 2022-01-25 大阳科技股份有限公司 可达成影像稳定的反射模组、相机模组与电子装置

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101303846B (zh) * 2007-05-09 2010-05-26 华硕电脑股份有限公司 影像导正感测装置
JP5542898B2 (ja) 2012-10-24 2014-07-09 Ｊｘ日鉱日石金属株式会社 カメラモジュール及びチタン銅箔
TWI766450B (zh) * 2020-05-13 2022-06-01 大陸商廣州立景創新科技有限公司 影像擷取模組及其組裝方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1130788A (zh) * 1994-11-18 1996-09-11 索尼公司 物镜驱动设备
CN1402036A (zh) * 2001-08-29 2003-03-12 三星电机株式会社 图象模块
JP2005165058A (ja) * 2003-12-03 2005-06-23 Sharp Corp オートフォーカス装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1130788A (zh) * 1994-11-18 1996-09-11 索尼公司 物镜驱动设备
CN1402036A (zh) * 2001-08-29 2003-03-12 三星电机株式会社 图象模块
JP2005165058A (ja) * 2003-12-03 2005-06-23 Sharp Corp オートフォーカス装置

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107153246A (zh) * 2017-07-04 2017-09-12 湖北欧亚高新科技股份有限公司 一种激光头物镜装配点胶一体机
CN107153246B (zh) * 2017-07-04 2023-01-06 湖北欧亚高新科技股份有限公司 一种激光头物镜装配点胶一体机
CN112835170A (zh) * 2019-11-25 2021-05-25 河源友华微机电科技有限公司 微型相机的三轴电磁驱动装置
CN112835170B (zh) * 2019-11-25 2023-11-14 河源友华微机电科技有限公司 微型相机的三轴电磁驱动装置
CN113970868A (zh) * 2020-07-22 2022-01-25 大阳科技股份有限公司 可达成影像稳定的反射模组、相机模组与电子装置
CN113970868B (zh) * 2020-07-22 2023-09-19 大阳科技股份有限公司 可达成影像稳定的反射模组、相机模组与电子装置

Also Published As

Publication number Publication date
CN1991559A (zh) 2007-07-04
CN100523981C (zh) 2009-08-05

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