WO2010108318A1 - Compact imaging device - Google Patents
Compact imaging device Download PDFInfo
- Publication number
- WO2010108318A1 WO2010108318A1 PCT/CN2009/070997 CN2009070997W WO2010108318A1 WO 2010108318 A1 WO2010108318 A1 WO 2010108318A1 CN 2009070997 W CN2009070997 W CN 2009070997W WO 2010108318 A1 WO2010108318 A1 WO 2010108318A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- electro
- active device
- image sensor
- lens unit
- pcb
- Prior art date
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Classifications
-
- 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
-
- 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
-
- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
Definitions
- the subject matter disclosed herein relates to an imaging device having a small form factor.
- Many portable electronic apparatuses such as a cellular phone and/or a personal digital assistant (PDA) for example, may comprise a compact camera module.
- a compact camera module may comprise an image sensor, an imaging lens unit, and/or an actuator to adjust the position of the imaging lens unit with respect to the image sensor.
- compact camera module manufacturers are facing a challenge of providing smaller compact camera modules that can fit into limited space of the apparatuses.
- Length, width, and height of a camera module may comprise three relatively important parameters regarding size reduction considerations.
- the footprint (length x width) of such a camera module may comprise a more important parameter regarding size reduction considerations: a camera module having a smaller footprint is desirable as it may occupy less area of printed circuit board. This in turn may lead to a higher degree of flexibility of integration as more components may be mounted in a given area of a printed circuit broad. Such increased integration may lead to portable electronic apparatuses able to provide increased functionality, for example.
- FIG. 1 is a view of components that comprise a compact imaging module, according to an embodiment.
- FIG. 2 is a side view of a compact imaging module depicting a lens moving in a vertical direction, according to an embodiment.
- FIG. 3 is a side view of a compact imaging module depicting a lens moving in a horizontal direction, according to an embodiment.
- FIG. 4 is a side view of a compact imaging module depicting a lens rotating about a horizontal axis, according to an embodiment.
- FIG. 5 is a side view of a compact imaging module depicting a lens rotating about a vertical axis, according to an embodiment.
- FIG. 6 is a schematic view of a piezoelectric element, according to an embodiment.
- FIG. 7 is a schematic view of a bi-laminar piezoelectric element, according to an embodiment.
- FIG. 8 is a side view of a compact imaging module, according to an embodiment.
- FIG. 9 is a side view of a compact imaging module, according to another embodiment.
- an apparatus may comprise at least one electro- active device to adjust a position of a lens unit, and an image sensor, wherein the electro- active device may be mounted on the image sensor.
- a lens unit may be mounted on the electro-active device.
- the terms, "and,” “and/or,” and “or” as used herein may include a variety of meanings that also is expected to depend at least in part upon the context in which such terms are used. Typically, “or” as well as “and/or” if used to associate a list, such as A, B or C, is intended to mean A, B, and C, here used in the inclusive sense, as well as A, B or C, here used in the exclusive sense.
- the term “one or more” as used herein may be used to describe any feature, structure, or characteristic in the singular or may be used to describe some combination of features, structures, or characteristics. Though, it should be noted that this is merely an illustrative example and claimed subject matter is not limited to this example.
- Patent Application No. 20050248680 are directed to reducing the size of a miniature camera module.
- a camera module may be formed by mounting an imaging lens unit on top of an image sensor directly.
- the imaging lens unit may be formed by stacking individual lenses on top of each other.
- a key limitation associated with this design is that the position of the imaging lens unit is fixed on the image sensor surface. Accordingly, such a module is therefore not able to perform a focusing function for objects at various distances, since a focusing function involves altering a distance between an imaging lens and an image sensor. As a result, quality of a captured image may be degraded.
- embodiments described herein include a compact module design that provides a mechanism or allows a process to adjust the distance between an imaging lens and an image sensor, wherein a footprint of the compact module is substantially the same as a footprint of the image sensor, for example.
- a structure of a compact imaging module may provide auto-focus, image stabilization, and/or other advance imaging functions, in which at least one electro-active device is mounted onto an image sensor.
- a configuration may comprise an intervening spacer disposed between an electro-active device and an image sensor.
- a structure or material layer may be disposed between an electro-active device and an image sensor so that the electro-active device is indirectly mounted on the image sensor.
- Such a structure and/or material layer may comprise a functionality regarding electronic and/or mechanical properties of the compact imaging module, for example.
- An imaging apparatus may comprise a lens unit, at least one electro-active device to adjust the position of the lens unit, and an image sensor, wherein the electro-active device may be mounted on the image sensor and the lens unit may be mounted on the electro-active device.
- the electro-active device may drive such a lens unit in a particular mode of motion, such as translation, rotation, and/or a tilting motion, with respect to the image sensor.
- Such an electro-active device may provide a relatively precise control of motion of a lens unit, so that various imaging functions, such as focusing for example, may lead to an improved image quality.
- An advantage of such a compact module is that its footprint may be substantially equal to or smaller than a footprint of an image sensor.
- a batch manufacturing process may be applied to such a compact module that includes a properly designed electro-active device. Such a batch process may occur on a wafer level process, for example. Such a process may lead to a relatively high manufacturing efficiency, thus lowering manufacturing costs of a camera, for example, due to a focus variation function provided by the compact module.
- a compact imaging module may comprise an image sensor, a lens unit, and/or an electro- active device to adjust the position of the lens unit with respect to the image sensor, wherein the electro-active device may be mounted on the image sensor and the lens unit may be mounted on the electro-active device.
- an electro-active device may be mounted on an inactive region of an image sensor.
- An electro-active device may comprise one or more actuators, such as an electromagnetic actuator including an electric coil at least partially surrounded by a yoke having one or more permanent magnets, for example.
- Another type of electro- active device may include a piezoelectric actuator, wherein a voltage may be applied to change a physical dimension of the actuator.
- Such electro-active devices may be adapted to adjust a position of a lens vertically, horizontally, rotationally about a substantially horizontal axis, and/or rotationally about a substantially vertical axis, for example.
- "vertically” refers to a direction substantially parallel to an optical axis of a compact camera module
- horizontally rotationally about a substantially horizontal axis
- horizontal axis and/or rotationally about a substantially vertical axis
- a compact imaging module may comprise an image sensor, a lens unit, an electro-active device to adjust the position of the lens unit with respect to the image sensor, and a surface or platform, such as a printed circuit board (PCB) to which the image sensor may be mounted, for example.
- the electro-active device may be mounted on an image sensor in such a way that the image sensor provides a physical separation between the electro-active device and the PCB.
- an electro-active device may be mounted on an inactive region of an image sensor so that the electro-active device does not physically contact a PCB on which the image sensor is disposed.
- Such a mounting configuration may allow an electro-active device to have a cross-section that is substantially the same size or smaller than an image sensor.
- such a configuration is merely an example, and claimed subject matter is not so limited.
- a compact imaging module may comprise an image sensor and an actuator to adjust a position of one or more lens units with respect to the image sensor. If the actuator is mounted to the image sensor, such a pre-assembled compact imaging module may be adapted to mount on a printed circuit board (PCB) in a subsequent manufacturing process, for example.
- a manufacturing process may include a wafer-level process, wherein components such as an image sensor, actuator, and/or lens may be formed together as a module in a wafer- level process.
- a wafer-level process wherein components such as an image sensor, actuator, and/or lens may be formed together as a module in a wafer- level process.
- FIG. 1 is a view of a compact imaging module 100, according to an embodiment.
- Such an imaging module may comprise an image sensor 120 mounted on a PCB 110.
- Image sensor 120 may comprise an active region 130 including an array of pixilated charge- coupled devices (CCD) or one or more complementary metal-oxide-semiconductor (CMOS) devices.
- Inactive region 140 of image sensor 120 may comprise a border to provide physical support to active region 130.
- Imaging module 100 may further comprise a lens assembly, which may include one or more lens units to provide an image onto active region 130 of image sensor 120. Such an image need not comprise visible wavelengths, but may also comprise infrared and/or ultraviolet wavelengths, for example. So that such an image is focused onto active region 130, actuator 160 may adjust a position of lens assembly 150 with respect to the image sensor.
- imaging module 100 may further comprise a spacer 104 disposed between actuator 160 and PCB 110 as well as electronics 108, for example.
- FIG. 2 is a side view of a compact imaging module 200 comprising an electro- active device 230 disposed on an image sensor 220, which may be electrically and/or physically mounted on a PCB 210.
- electro- active device 230 may be disposed on image sensor 220 in such a way as to provide a physical separation between electro-active device 230 and PCB 210.
- electro-active device 230 may be mounted on an inactive region of image sensor 220 so that electro-active device 230 does not physically contact PCB 210 (on which the image sensor is disposed).
- an electro-active device may have a smaller cross-section and/or profile compared to an electro-active device that is wide enough to extend beyond an image sensor perimeter to reach (and mount to) a PCB.
- the wider electro-active device may be physically mountable to a PCB, but such a wider electro-active device may involve an electro-active device that is wider than an image sensor that is disposed between the electro- active device and the PCB.
- an electro-active device that mounts to an image sensor may provide an opportunity to reduce a size and/or volume of an imaging module, such as compact imaging module 200.
- a PCB need not provide an electro-active device with electrical signals, so that an electro-active device need not be electrically contacting a PCB.
- electrical signals may be provided to an electro-active device via electrical connectors from sources other than a PCB.
- compact imaging module 200 provides a smaller profile size since electro-active device 230 is mounted to image sensor 220 instead of PCB 210.
- a top-view surface area of electro- active device 230 may be equal to or less than that of image sensor 220, thus maintaining a relatively small area and volume.
- electro-active device 230 may be adapted to adjust a vertical position of at least a portion of lens assembly 240 with respect to image sensor 220.
- a lens assembly may comprise one or more lens units 250 so that the vertical position of one or more of such lenses may be adjusted.
- Electro-active device 230 may comprise an electromagnetic actuator or a piezoelectric actuator, as indicated above.
- an electromagnetic actuator may include an electric coil which may be partially surrounded by a yoke having one or more permanent magnets.
- a piezoelectric actuator may employ one or more piezoelectric elements, which may comprise a piezoelectric ceramic and/or a crystal material.
- Such an electro-active device may provide a means for such a vertical adjustment, as explained below.
- FIG. 3 is a side view of a compact imaging module 300 comprising an electro- active device 330 disposed on an image sensor 320, which may be electrically and/or physically mounted on a PCB 310.
- electro-active device 330 may be disposed on image sensor 320 in such a way as to provide a physical separation between electro-active device 330 and PCB 310.
- Electro- active device 330 may be adapted to adjust a horizontal position of at least a portion of lens assembly 340 with respect to image sensor 320.
- Such a lens assembly may comprise one or more lens units 350 so that the horizontal position of one or more of such lenses may be adjusted.
- electro-active device 330 may be an electromagnetic actuator or a piezoelectric actuator.
- An electro-active device employing one or more bi-laminar piezoelectric elements, which are described in detail below, may provide means for such a horizontal adjustment.
- such an adjustment may be useful to position a lens for image stabilization, such as for an anti- shaking function, for example, though claimed subject matter is not so limited.
- FIG. 4 is a side view of a compact imaging module 400 comprising an electro- active device 430 disposed on an image sensor 420, which may be electrically and/or physically mounted on a PCB 410.
- electro-active device 430 may be disposed on image sensor 420 in such a way as to provide a physical separation between electro-active device 430 and PCB 410.
- Electro- active device 430 may be adapted to rotationally adjust a position of at least a portion of lens assembly 440 with respect to image sensor 420. Such rotational adjustment may be about a substantially horizontal axis (not shown, but would be coming out of the page of FIG. 4).
- Lens assembly 440 may comprise one or more lens units 450 so that the position of one or more of such lenses may be adjusted.
- electro-active device 430 may be an electromagnetic actuator or a piezoelectric actuator.
- An electro-active device employing one or more piezoelectric elements may provide means for such a rotational adjustment, as described in detail below. In a particular embodiment, such an adjustment may be useful to provide an advance asymmetric imaging function, for example, though claimed subject matter is not so limited.
- FIG. 5 is a side view of a compact imaging module 500 comprising an electro- active device 530 disposed on an image sensor 520, which may be electrically and/or physically mounted on a PCB 510. In an embodiment, similar to that shown in FIG.
- electro-active device 530 may be disposed on image sensor 520 in such a way as to provide a physical separation between electro-active device 530 and PCB 510. Electro- active device 530 may be adapted to rotationally adjust a position of at least a portion of lens assembly 540 with respect to image sensor 520. Such rotational adjustment may include a rotation of such a portion of lens assembly 540 about a substantially vertical axis 560. Lens assembly 540 may comprise one or more lens units 550 so that the position of one or more of such lenses may be adjusted. As used herein, vertical refers to a direction parallel to an optical axis of lens assembly 540 and/or an optical axis of imaging module 500.
- Electro-active device 530 which may comprise an electromagnetic actuator or a piezoelectric actuator, described in detail below, may provide means for such a rotational adjustment.
- FIG. 6 is a schematic view of a piezoelectric element 610, according to an embodiment.
- a voltage 620 applied to electrical terminals 630 may induce a size change 640 along a particular direction, as shown in FIG. 6 for example. Accordingly, piezoelectric element 610 may attain a new size, as represented by piezoelectric element 650. If a lens assembly, for example, is fixed to such a piezoelectric element, then a position and/or orientation of the lens assembly may change as the size of the piezoelectric element changes.
- a process for adjusting a position of a lens may include applying voltage 620 to electrical terminals 630 to change the size of piezoelectric element 610 along a particular direction.
- voltage 620 to electrical terminals 630 to change the size of piezoelectric element 610 along a particular direction.
- a process to change a position of a lens is merely an example, and claimed subject matter is not so limited.
- FIG. 7 is a schematic view of a bi-laminar piezoelectric element 710, according to an embodiment, piezoelectric element 710 may comprise multiple piezoelectric elements laminated to one another, such as a first piezoelectric element 712 and a second piezoelectric element 715.
- one piezoelectric element may expand more than another piezoelectric element so that a voltage applied to the first and second piezoelectric elements may lead to differential expansion, wherein one piezoelectric element expands at a different rate than another piezoelectric element.
- a voltage 720 applied to electrical terminals 730 may induce a greater size change in first piezoelectric element 712 than a size change in second piezoelectric element 715 resulting from application of the same voltage.
- Such a differential expansion may provide non-uniform shear forces across a cross-section of bi-laminar piezoelectric element 750, which may provide bending as a result.
- piezoelectric element 710 may attain a new size and/or shape, as represented by a curvature 740 of bi-laminar piezoelectric element 750, as shown in FIG. 7.
- bi-laminar piezoelectric element 750 is curved with respect to bi-laminar piezoelectric element 710 as a result of applying voltage 720 to bi-laminar piezoelectric element 750.
- a lens assembly for example, is fixed to such a bi-laminar piezoelectric element, then the position and/or orientation of the lens assembly may change as the size of the bi- laminar piezoelectric element changes from application of voltage thereon.
- a process for adjusting a position of a lens may include applying voltage 720 to electrical terminals 730 to change the size and/or shape of bi-laminar piezoelectric element 710.
- such a process to change a position of a lens is merely an example, and claimed subject matter is not so limited.
- FIG. 8 is a side view of a compact imaging module 800, according to an embodiment.
- a module may comprise an electro-active device 810 that physically supports a lens assembly 870 including one or more lens units 850.
- Electro-active device 810 which may comprise an electromagnetic actuator or a piezoelectric actuator, may be mounted on an image sensor 820 having electrical connections 825 for mounting to a PCB (not shown).
- an electromagnetic actuator may include an electric coil which could be partially surrounded by a yoke having one or more permanent magnets.
- piezoelectric actuator may include one or more piezoelectric elements and/or one or more bi-laminar piezoelectric elements.
- a cavity 815 may provide a path for imaging light rays from one or more lens units 850 to reach image sensor 820.
- a voltage may be applied to one or more piezoelectric elements of piezoelectric actuator 810 to change a size of the piezoelectric actuator along a particular side and/or direction, such as the x-axis shown in FIG. 8 for example.
- a voltage applied in a y-direction of a piezoelectric may provide an expansion of the piezoelectric in an x-direction, though claimed subject matter is not so limited. Accordingly, as piezoelectric actuator 810 changes size along the x-axis, a vertical position of lens assembly 870 may also change.
- FIG. 9 is a side view of a compact imaging module, according to another embodiment.
- Such a module may comprise an electro-active device 910 that may include one or more piezoelectric elements and/or one or more bi-laminar piezoelectric elements.
- Piezoelectric electro-active device 910 may physically support a lens assembly 970 including one or more lens units 950.
- Electro-active device 910 may comprise an electromagnetic actuator or a piezoelectric actuator.
- an electromagnetic actuator may include an electric coil which may be partially surrounded by a yoke having one or more permanent magnets.
- piezoelectric actuator may include one or more piezoelectric elements and/or one or more bi-laminar piezoelectric elements.
- Electro-active device 910 may be supported by a supporting structure 980, which may be mounted on a portion of an image sensor 920, such as an inactive region of image sensor 920, for example.
- supporting structure 980 may comprise a thermally conducting material to provide heat-sinking to image sensor 920.
- Image sensor 920 may include electrical connections 925 for mounting to a PCB (not shown).
- a cavity 915 may provide a path for imaging light rays from one or more lens units 950 to reach image sensor 920.
- a voltage may be applied to one or more piezoelectric elements of piezoelectric actuator 910 to change a size of the piezoelectric actuator along a particular direction, such as the x-axis shown in FIG. 9 for example.
- piezoelectric actuator 910 changes size along the x-axis, a vertical position of lens assembly 970 may also change. In this fashion, a vertical position of one or more lens units 950 may be changed to adjust a position of a focal plane of one or more lens units 950 to coincide with an active region surface of image sensor 920.
- piezoelectric actuator 910 may comprise bi-laminar piezoelectric element so that a voltage applied to piezoelectric actuator 910 may lead to a sideway shift of lens assembly 970, as indicated by arrow 960 in FIG. 9. In this fashion, a position of one or more lens units 950 may be changed with respect to an active region surface of image sensor 920.
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/CN2009/070997 WO2010108318A1 (en) | 2009-03-25 | 2009-03-25 | Compact imaging device |
KR1020117019468A KR20110118690A (en) | 2009-03-25 | 2009-03-25 | Compact imaging device |
JP2012501108A JP2012521569A (en) | 2009-03-25 | 2009-03-25 | Micro imaging device |
CN2009800000403A CN101682697B (en) | 2009-03-25 | 2009-03-25 | Minitype imaging equipment |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/CN2009/070997 WO2010108318A1 (en) | 2009-03-25 | 2009-03-25 | Compact imaging device |
Publications (1)
Publication Number | Publication Date |
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WO2010108318A1 true WO2010108318A1 (en) | 2010-09-30 |
Family
ID=42029940
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/CN2009/070997 WO2010108318A1 (en) | 2009-03-25 | 2009-03-25 | Compact imaging device |
Country Status (4)
Country | Link |
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JP (1) | JP2012521569A (en) |
KR (1) | KR20110118690A (en) |
CN (1) | CN101682697B (en) |
WO (1) | WO2010108318A1 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
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CN103676455B (en) | 2012-09-26 | 2016-06-29 | 爱佩仪光电技术(深圳)有限公司 | The automatic adjustment method of optics shockproof camera module and system |
JPWO2015005217A1 (en) * | 2013-07-10 | 2017-03-02 | 株式会社村田製作所 | Lens module |
CN104580852B (en) * | 2014-11-28 | 2018-01-02 | 南昌欧菲光电技术有限公司 | Cell-phone camera device and mobile phone |
Citations (4)
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US20020075393A1 (en) * | 2000-12-15 | 2002-06-20 | Samsung Electro-Mechanics Co., Ltd. | Micro mode executing apparatus of digital still camera using focus driving motor |
CN2518299Y (en) * | 2001-12-31 | 2002-10-23 | 广州市奥特控制工程有限公司 | Whole-vision paster machine |
CN1655000A (en) * | 2004-02-13 | 2005-08-17 | 中国科学院力学研究所 | Angular automatic focusing system and method for optical imaging system |
CN201171261Y (en) * | 2008-02-02 | 2008-12-24 | 赵永先 | Video positioning apparatus for pasting machine |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008186000A (en) * | 2007-01-31 | 2008-08-14 | Sharp Corp | Focus adjustment actuator, imaging module, and imaging unit |
JP4826796B2 (en) * | 2007-02-20 | 2011-11-30 | コニカミノルタオプト株式会社 | Shape memory alloy actuator, imaging unit |
-
2009
- 2009-03-25 KR KR1020117019468A patent/KR20110118690A/en not_active Application Discontinuation
- 2009-03-25 JP JP2012501108A patent/JP2012521569A/en active Pending
- 2009-03-25 WO PCT/CN2009/070997 patent/WO2010108318A1/en active Application Filing
- 2009-03-25 CN CN2009800000403A patent/CN101682697B/en active Active
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20020075393A1 (en) * | 2000-12-15 | 2002-06-20 | Samsung Electro-Mechanics Co., Ltd. | Micro mode executing apparatus of digital still camera using focus driving motor |
CN2518299Y (en) * | 2001-12-31 | 2002-10-23 | 广州市奥特控制工程有限公司 | Whole-vision paster machine |
CN1655000A (en) * | 2004-02-13 | 2005-08-17 | 中国科学院力学研究所 | Angular automatic focusing system and method for optical imaging system |
CN201171261Y (en) * | 2008-02-02 | 2008-12-24 | 赵永先 | Video positioning apparatus for pasting machine |
Also Published As
Publication number | Publication date |
---|---|
JP2012521569A (en) | 2012-09-13 |
CN101682697A (en) | 2010-03-24 |
CN101682697B (en) | 2012-09-05 |
KR20110118690A (en) | 2011-10-31 |
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