WO2007111034A1 - 光学手段駆動装置 - Google Patents
光学手段駆動装置 Download PDFInfo
- Publication number
- WO2007111034A1 WO2007111034A1 PCT/JP2007/050885 JP2007050885W WO2007111034A1 WO 2007111034 A1 WO2007111034 A1 WO 2007111034A1 JP 2007050885 W JP2007050885 W JP 2007050885W WO 2007111034 A1 WO2007111034 A1 WO 2007111034A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- optical
- optical means
- holder
- optical disc
- objective lens
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
- G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
- G11B7/0925—Electromechanical actuators for lens positioning
- G11B7/0933—Details of stationary parts
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
- G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
- G11B7/0925—Electromechanical actuators for lens positioning
- G11B7/0935—Details of the moving parts
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
- G11B7/121—Protecting the head, e.g. against dust or impact with the record carrier
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
- G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
- G11B7/1372—Lenses
- G11B7/1374—Objective lenses
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B2007/0003—Recording, reproducing or erasing systems characterised by the structure or type of the carrier
- G11B2007/0006—Recording, reproducing or erasing systems characterised by the structure or type of the carrier adapted for scanning different types of carrier, e.g. CD & DVD
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B2007/0003—Recording, reproducing or erasing systems characterised by the structure or type of the carrier
- G11B2007/0009—Recording, reproducing or erasing systems characterised by the structure or type of the carrier for carriers having data stored in three dimensions, e.g. volume storage
- G11B2007/0013—Recording, reproducing or erasing systems characterised by the structure or type of the carrier for carriers having data stored in three dimensions, e.g. volume storage for carriers having multiple discrete layers
Definitions
- the present invention relates to an optical disc apparatus for recording or reproducing information on an information recording medium, such as a DVD (Digital Versatile Disc) recorder, a BD player, etc., and particularly to an optical means driving apparatus. .
- an information recording medium such as a DVD (Digital Versatile Disc) recorder, a BD player, etc.
- CD Compact Disc
- DVD Digital Versatile Disc
- BD Blu-Ray Disc
- HD DVD High Definition DVD
- Patent Document 1 Japanese Patent Application Laid-Open No. 2003-281758 (No. 1-11, No. 2-13)
- the present invention has been made to solve the above-described problems, and in the optical means driving apparatus in which a plurality of object lenses are held in a lens holder, a small and highly rigid optical means driving apparatus is obtained. Objective.
- An optical means driving apparatus comprises: A plurality of optical means for condensing the light beam output from the light source onto the optical disc, a focusing coil, and a holder for holding the tracking coil;
- a plurality of elastic support members for movably supporting the holder in a substantially radial direction of the optical disc and in a direction substantially perpendicular to the optical disc;
- An optical means driving device comprising: an inner yoke disposed inside the holder; a focusing coil; and a base for holding a magnet that generates a magnetic field with respect to the tracking coil.
- the upper surface of the inner yoke of the holder has a closed structure
- the upper surface of the inner yoke in the holder has a closed structure, there is an effect that a small and highly rigid optical means driving device can be obtained.
- FIG. 1 is a perspective view showing an optical means driving device and its peripheral main parts in Embodiment 1.
- FIG. 1 is a perspective view showing an optical means driving device and its peripheral main parts in Embodiment 1.
- FIG. 2 in the first embodiment is a perspective view showing an optical means driving device.
- FIG. 3 is a three-side view of the optical means driving apparatus 105 in the first embodiment.
- FIG. 4 is an exploded view of the optical means driving apparatus in the first embodiment.
- FIG. 5 is an explanatory diagram of the arrangement height of the objective lens in the first embodiment.
- FIG. 6 is a perspective view showing an objective lens mounting structure in the first embodiment.
- FIG. 7 is a front view and a side view for explaining a state in which the objective lens and the protector in Embodiment 1 are attached.
- FIG. 8 is a cross-sectional view taken along the line AA in FIG.
- FIG. 9 is a BB sectional view of FIG. 2 in the first embodiment.
- FIG. 10 is a perspective view after assembling the movable part unit and the fixed part unit of the optical means driving apparatus in Embodiment 1.
- FIG. 11 is a perspective view of FIG. 10 in the first embodiment as seen from another viewpoint.
- FIG. 1 is a perspective view showing an optical means driving device 105 and its peripheral main parts in Embodiment 1 of the present invention
- FIG. 2 is a perspective view showing the optical means driving device 105
- FIG. 3 is an optical means driving device.
- Fig. 4 is an exploded view of the optical means driving device 105
- Fig. 5 is an explanatory diagram of the arrangement height of the objective lenses 110 and 111 which are a part of the optical means driving device 105
- Fig. 6 is an objective lens.
- FIG. 7 is a front view and a side view for explaining a state in which the objective lenses 110 and 111 and the protector 113 are attached.
- FIG. 8 is a cross-sectional view taken along the line AA in FIG.
- FIG. 9 is a cross-sectional view taken along the line BB in FIG. 2
- FIG. 10 is a perspective view after the movable unit 118 and the fixed unit 123 of the optical means driving device 105 in Embodiment 1 are assembled, and FIG. 11 is different from FIG. It is the perspective view seen from the viewpoint.
- the X, ⁇ , and ⁇ coordinate axes shown in each figure are set parallel to the optical axis of the objective lens, and the X axis is set perpendicular to the ⁇ axis and in the radial direction of the disk-shaped recording medium.
- the perpendicular direction is set as the vertical axis.
- 101 is an optical disk as an optical information recording medium
- 102 is a turntable on which the optical disk 101 is placed
- 103 is a spindle motor for rotating the turntable 102.
- Reference numeral 104 denotes an optical base on which a plurality of light sources such as semiconductor lasers (not shown) and an optical means driving device 105 are mounted. It is supported to be movable in the radial direction (X-axis direction).
- Reference numeral 107 denotes a cover for protecting the optical means driving device 105.
- the red light beam having a wavelength of around 660 nm and the light beam having a wavelength of around 780 nm are referred to as a light beam j8.
- 110 and 111 are objective lenses for converging the light flux ⁇ and the light flux j8 onto the optical disc 101.
- the objective lens 110 is for BD (Blu-Ray Disc)
- the objective lens 111 is for CD (Compact Disc) and DVD (Digital Versatile). Disc) Compatible two-focus type.
- the specifications such as the external length, focal length, working distance (working distance) are different.
- the optical axes of the objective lens 110 and the objective lens 111 are parallel to the Z axis, and a line segment connecting the centers of the objective lens 110 and the objective lens 111 is arranged with an X-axis force inclined at a predetermined angle.
- this angle is 45 degrees
- the light beam ⁇ and the light beam j8 are also sent to the objective lens 110 and the objective lens 111 through a wavelength-selective mirror (not shown) provided under the objective lens 110 and the objective lens 111. It is configured so that a 45 degree directional force is also incident.
- the lens holder 112 is formed of a lightweight and highly rigid plastic, and has a substantially rectangular parallelepiped shape having a surface perpendicular to the Z axis, a side surface perpendicular to the X axis, and a side surface perpendicular to the Y axis.
- the objective lens 111 is focused in the state shown in FIG. 5 (A)
- the lens holder 112 moves in the Z-axis direction, and in the state shown in FIG. 5 (B). It has come to focus.
- the position of the lens holder 112 in the Z-axis direction is focused at the position of FIG. 5 (C) between the position of FIG. 5 (A) and the position of FIG. 5 (B).
- the position of the objective lens 110 for BD in the Z-axis direction is determined.
- the attachment position of the objective lens will be described with reference to Figs.
- the attachment portion of the objective lens 110 created in the lens holder 112 is provided with a notch portion 112a for attaching the objective lens 111.
- a part of the objective lens 111 is under the objective lens 110, and the outer shapes are overlapped when viewed from the optical axis direction.
- the distances between the objective lenses 110 and 111 and the optical disc 101 are compared.
- the optical A protector 113 which is a protection means at the time of collision between the disc 101 and the objective lens, is fixed.
- Two protrusions 113a and 113b force S are provided on the upper surface of the protector 113, and the tips of the protrusions 113a and 113b are slightly protruded from the upper surface of the objective lens 110.
- the attachment portion of the objective lens 110 of the lens holder 112 is provided with a notch 112b in the X-axis direction, and a part of the outer shape of the objective lens 110 protrudes from the lens holder 112 from the notch 112b. It is fixed like this.
- FIG. 8 is a sectional view showing the positional relationship among the optical disc 101, the turntable 102, the spindle motor 103, the objective lens 110, and the lens holder 112 when the optical base 104 is arranged on the innermost peripheral side of the optical disc 101. is there.
- the diameter of the spindle motor 103 is generally smaller than the diameter of the turntable 102.
- the turntable 102 and the objective lens 110 are configured to be closest to each other in outer diameter.
- a light shielding portion 112c for preventing the light flux ⁇ from leaking into the optical disc 101 is formed below the lens holder 112.
- FIGS. 10 and 11 are perspective views showing a state in which the movable unit 118 and the fixed unit 123 are assembled (see FIG. 9 in part).
- the movable unit 118 will be described.
- a rectangular hole 112d, 112e is provided in the center of a pair of side walls perpendicular to the Y axis of the lens holder 112, and two continuously wound focusing coils 114a having a winding axis in the Z axis direction, 114b is inserted and fixed, and then a pair of side walls perpendicular to the Y-axis have winding axes in the Y-axis direction.
- the focusing coils 114a and 114b of the lens holder 112 have four fixedly wound tilt coils 116a, 116b, and 116c. , 116d force ⁇ Fixed and fixed!
- the upper surface of the lens holder 112 is covered with the wall portions 112 2f and 112g which are paragraphs, and the light flux ⁇ and the light flux j8 are also emitted from the Y-axis direction of the lens holder 112.
- the disc 101 does not leak.
- the movable part side substrates 117a and 117b are fixed to a pair of side walls perpendicular to the X axis of the lens holder 112, focusing coils 114a and 114b, tracking coils 115a, 115b, 115c and 115d, and tilt coils 116a and 116b.
- 116c and 116d are soldered to form the movable unit 118.
- Base yoke 119 is made of cold rolled steel Magnets 120a, 120b magnetized in parallel so that the magnetic poles are pressed and have inner yoke parts 119a, 119b with a slit in the center, and the inner poles 119a, 119b are sandwiched and the same poles face each other
- the force S is fixed to the fixing plates 119b and 119d of the base yoke 119, respectively, and forms a magnetic gap that becomes a closed magnetic path.
- a gel holder 122 to which the fixed portion side substrates 121a and 121b are fixed is bonded and fixed to the base yoke 119.
- the fixed unit 123 is configured as described above.
- each of the wires 124a to 124f which are conductive elastic bodies arranged in parallel with each other, is fixed to the movable part side substrates 117a and 117b by soldering.
- the other ends are fixed to the fixed portion side substrates 121a and 121b by soldering. Therefore, the movable unit 118 can be moved in the Z-axis direction (focusing direction), X-axis direction (tracking direction), and Y-axis rotation direction (tilt direction) with respect to the fixed unit 123 by the wires 124a to 124f. Elastically supported.
- wires 124a and 124d are connected to focusing coils 114a and 114b, wires 124b and 124e are connected to force tracking coins 115a, 115b, 115c and 115d, and wires 124c and 1 24f force coins 116a and 116b are connected. , 116c, 116d!
- the wires 124a to 124f extend along the XZ plane including the central axis of the spin motor 103 !.
- Square holes 122a and 122b are formed on the fixed part side substrate of the gel holder 122 (see FIG. 4), and the ultraviolet holes curable gel is wrapped around the bases of the wires 124a to 124f in the square holes 122a and 122b. This is filled with 125-shaped damper agent 125a and 125b!
- the holes facing the Z-axis direction of the chinolet coinores 116a, 116b, 116c, 116d and the holes facing the Z-axis direction of the focusing coins 114a, 114b [the inner yokes 119a, 119b force S
- Each side that is inserted and faces the Z axis direction of the tracking coins 115a, 115b, 115c, 115d is arranged so as to face the magnets 120a, 120b.
- the magnetic circuit including the inner portions 119a, 1191) and the magnets 120 & , 120b is arranged in the Y-axis direction, which is the tangential direction of the optical disc 101, with the lens holder 112 interposed therebetween.
- a force force connected in series is applied by applying a focus control voltage to a predetermined terminal (not shown) of the fixed part side substrates 121a and 121b.
- the focusing coins 114a and 114b are energized through the wires 124a and 124d to which the single coils 114a and 114b are connected.
- electromagnetic force is generated in the Z direction due to the interaction with the magnetic field generated by the magnets 120a and 120b, and the movable unit 118 and the objective lenses 110 and 111 are driven. Move in the Z-axis direction) to perform optical spot focus control.
- the tracking coils 115a to 115d are connected by applying a track control voltage to predetermined terminals (not shown) of the fixed part side substrates 121a and 121b! Are connected in series via the wires 124b to 124e !, and the tracking tracking 115 & 115 (1 is energized.
- electromagnetic force is generated by the interaction with the magnetic fields generated by the magnets 120a and 120b.
- the movable unit 118 and the objective lenses 110 and 111 are driven to move in the radial direction (X-axis direction) of the optical disc 101 to perform tracking control of the light spot.
- the tilt coils 116a to 116d are applied by applying a tilt control voltage to predetermined terminals (not shown) of the fixed part side substrates 121a and 121b.
- predetermined terminals not shown
- the tilting coins 116a to 116d are energized. Since the windings 116a and 116c and the windings 116b and 116d are arranged so that the winding directions are reversed, the tilt coils 116a and 116c are caused by the interaction with the magnetic field generated by the magnets 120a and 120b.
- tilt coils 116b and 1 16d generate an electromagnetic force in the opposite direction in the Z direction and a moment in the Y-axis rotation direction, respectively, and the movable unit 118 and the objective lenses 110 and 111 are rotated by the force S.
- Radial tilt control of the light spot is performed so that the optical axes of the objective lenses 110 and 111 are always perpendicular to the inclination in the radial direction (X-axis direction).
- the movable unit 118 is elastically supported by the six wires 124a to 124f so as to be movable in the Z-axis direction, the X-axis direction, and the Y-axis rotation direction! Therefore, the focusing coils 114a, 114b When energization of the coil is released, it returns to the operation reference position in the Z-axis direction, and when energization of the tracking coils 115a to 115d is released, it returns to the operation reference position in the X direction and returns to the tilt coils 116a to l16d. When the power is turned off, the actuator returns to the operation reference position in the Y-axis rotation direction.
- the movable unit 118 is given damping and good focus control. Characteristics, track control characteristics, and radial tilt control characteristics are obtained, and unnecessary vibration caused by external force is not easily transmitted to the movable unit 118. Further, when the movable unit 118 moves away from the optical disc 101 in the focus control direction, the wall portions 112f and 112g of the lens holder 112 and the inner yoke portions 118a and 118b come into contact with each other to regulate the movable amount.
- wires 124a and 124d are connected to focusing coils 114a and 114b, wires 124b and 124e force are connected to S tracking coinholes 115a, 115b, 115c, and 115d, and wires 124c and 124f force tinet coinores are connected. It has been explained that it is connected to 116a, 116b, 116c, 116d! /, But the position of the wire is not limited to the above position, and focusing is possible by combining two of the six wires 124a to 124f. It only needs to be connected to the coil, tracking coil, and tilt coil.
- the magnet 120a, 1201) and the magnetic circuit 119 &, 119b are arranged in the tangential direction of the optical disc 101 with the lens holder 112 in between, and the upper surfaces of the inner yoke portions 119a, 119b are closed. Since it is arranged inside the lens holder 112, it is possible to provide an optical means driving apparatus that has high sensitivity and high rigidity and that has a small radial dimension of the optical disc 101.
- the two objective lenses 110 and 111 are arranged to be inclined with respect to the X-axis direction, the dimension in the radial direction (X-axis direction) of the optical disc 101 at the center of the two objective lenses 110 and 111 is reduced.
- Optical means that can read and write the innermost circumference information of the optical disc 101 more easily without interfering with the turntable 102 and the spindle motor 103 even if the objective lens 111 arranged on the outer circumference side is used.
- a drive device can be obtained.
- the light shielding portion 112c for preventing leakage of the incident light beam is formed in the lower portion of the side wall in the X-axis direction of the lens holder 112, the interference between the light shielding portion 112c and the turntable 102 is avoided, and the optical means
- the driving device 105 can be arranged on the inner peripheral side of the optical disc 101 more.
- the light shielding portion 112c is arranged on the opposite side in the Z-axis direction with respect to the objective lens 110 and the objective lens 111, it serves as a balancer that balances the weight of the movable portion unit 118.
- the notch 112b is provided in a portion of the lens holder 112 adjacent to the turntable 102 of the mounting portion of the objective lens 110, and a part of the objective lens 110 projects from the lens holder 112, the objective The centers of the lenses 110 and 111 can be arranged more on the inner periphery of the optical disc 101.
- the two objective lenses 110 and 111 are arranged at different heights in the Z-axis direction, and are arranged so that a part of the two objective lenses 110 and 111 overlap when viewed from the Z-axis direction. This makes it possible to reduce the size and weight of the optical disc 101 and to dispose the objective lens 111 disposed on the outer peripheral side of the optical disc 101 closer to the inner peripheral side of the optical disc 101.
- the lens holder 112 can be rotated around the axis in the Y-axis direction, and radial tilt control is also possible.
- the focal position of the objective lens 110 is arranged so as to be between the two focal positions of the bifocal objective lens 111, the position of the focus operation is not shifted even when recording / reproducing of different types of the optical disc 101 is performed. It is possible to reduce the characteristic change due to the type of the optical disc and to design a small focus movable amount, so that a small optical means driving device can be provided.
- the protector 113 having a slight protrusion from the upper surface of the objective lens 110 close to the optical disk 101 is arranged on the upper surface of the objective lens 111 away from the optical disk 101, the protector for protecting the optical disk 101 is inexpensive and simple. Can be made into any shape.
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- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Recording Or Reproduction (AREA)
- Optical Head (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN2007800090627A CN101401157B (zh) | 2006-03-29 | 2007-01-22 | 光学构件驱动装置 |
JP2008507383A JP4768013B2 (ja) | 2006-03-29 | 2007-01-22 | 光学手段駆動装置 |
EP07707148A EP2001018A4 (en) | 2006-03-29 | 2007-01-22 | DEVICE FOR CONTROLLING OPTICAL MEANS |
US12/224,395 US8042130B2 (en) | 2006-01-22 | 2007-01-22 | Optical driving device including a holder with a top face having a closed structure |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2006-092016 | 2006-03-29 | ||
JP2006092016 | 2006-03-29 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2007111034A1 true WO2007111034A1 (ja) | 2007-10-04 |
Family
ID=38540969
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2007/050885 WO2007111034A1 (ja) | 2006-01-22 | 2007-01-22 | 光学手段駆動装置 |
Country Status (5)
Country | Link |
---|---|
US (1) | US8042130B2 (ja) |
EP (1) | EP2001018A4 (ja) |
JP (1) | JP4768013B2 (ja) |
CN (1) | CN101401157B (ja) |
WO (1) | WO2007111034A1 (ja) |
Cited By (1)
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US8117631B2 (en) * | 2006-12-28 | 2012-02-14 | Thomson Licensing | Pickup with asymmetrically arranged lens for accessing moving storage media and drive having the pickup |
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KR100532497B1 (ko) * | 2004-01-27 | 2005-11-30 | 삼성전자주식회사 | 자기 회로 및 이를 채용한 광픽업용 액츄에이터 및 광기록 및/또는 재생기기 |
US7570547B2 (en) * | 2005-08-22 | 2009-08-04 | Konica Minolta Opto, Inc. | Objective lens unit and optical pickup device |
JP4542070B2 (ja) * | 2006-08-24 | 2010-09-08 | 株式会社日立メディアエレクトロニクス | 光ピックアップ装置及び光ディスクドライブ装置 |
-
2007
- 2007-01-22 US US12/224,395 patent/US8042130B2/en not_active Expired - Fee Related
- 2007-01-22 JP JP2008507383A patent/JP4768013B2/ja not_active Expired - Fee Related
- 2007-01-22 WO PCT/JP2007/050885 patent/WO2007111034A1/ja active Application Filing
- 2007-01-22 EP EP07707148A patent/EP2001018A4/en not_active Withdrawn
- 2007-01-22 CN CN2007800090627A patent/CN101401157B/zh not_active Expired - Fee Related
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JPH09297927A (ja) * | 1996-05-07 | 1997-11-18 | Sharp Corp | 光ピックアップ装置 |
JP2003281758A (ja) | 2001-12-01 | 2003-10-03 | Samsung Electronics Co Ltd | 光ピックアップ用のアクチュエータ |
JP2005174485A (ja) * | 2003-12-12 | 2005-06-30 | Matsushita Electric Ind Co Ltd | 対物レンズ、光ピックアップ装置、及び光ディスク装置 |
JP2005302163A (ja) * | 2004-04-13 | 2005-10-27 | Sony Corp | 光ピックアップ及びディスクドライブ装置 |
JP2005302162A (ja) * | 2004-04-13 | 2005-10-27 | Sony Corp | 光ピックアップ及びディスクドライブ装置 |
JP2006079781A (ja) * | 2004-09-13 | 2006-03-23 | Sony Corp | 光ピックアップ及びディスクドライブ装置 |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8117631B2 (en) * | 2006-12-28 | 2012-02-14 | Thomson Licensing | Pickup with asymmetrically arranged lens for accessing moving storage media and drive having the pickup |
Also Published As
Publication number | Publication date |
---|---|
JP4768013B2 (ja) | 2011-09-07 |
EP2001018A9 (en) | 2009-03-11 |
US8042130B2 (en) | 2011-10-18 |
CN101401157A (zh) | 2009-04-01 |
US20100153980A1 (en) | 2010-06-17 |
CN101401157B (zh) | 2011-07-20 |
JPWO2007111034A1 (ja) | 2009-08-06 |
EP2001018A4 (en) | 2009-04-08 |
EP2001018A2 (en) | 2008-12-10 |
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