WO2007055166A1 - 光ピックアップ装置 - Google Patents
光ピックアップ装置 Download PDFInfo
- Publication number
- WO2007055166A1 WO2007055166A1 PCT/JP2006/322088 JP2006322088W WO2007055166A1 WO 2007055166 A1 WO2007055166 A1 WO 2007055166A1 JP 2006322088 W JP2006322088 W JP 2006322088W WO 2007055166 A1 WO2007055166 A1 WO 2007055166A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- information recording
- optical
- wavelength
- light beam
- recording medium
- 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
- G11B7/12—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
- G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
- G11B7/085—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam into, or out of, its operative position or across tracks, otherwise than during the transducing operation, e.g. for adjustment or preliminary positioning or track change or selection
- G11B7/08505—Methods for track change, selection or preliminary positioning by moving the head
- G11B7/08517—Methods for track change, selection or preliminary positioning by moving the head with tracking pull-in only
-
- 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
- G11B7/125—Optical beam sources therefor, e.g. laser control circuitry specially adapted for optical storage devices; Modulators, e.g. means for controlling the size or intensity of optical spots or optical traces
- G11B7/127—Lasers; Multiple laser arrays
- G11B7/1275—Two or more lasers having different wavelengths
-
- 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
- G11B7/1353—Diffractive elements, e.g. holograms or gratings
-
- 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
- G11B7/1378—Separate aberration correction lenses; Cylindrical lenses to generate astigmatism; Beam expanders
-
- 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
- G11B7/1392—Means for controlling the beam wavefront, e.g. for correction of aberration
- G11B7/13922—Means for controlling the beam wavefront, e.g. for correction of aberration passive
-
- 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
- G11B7/1392—Means for controlling the beam wavefront, e.g. for correction of aberration
- G11B7/13925—Means for controlling the beam wavefront, e.g. for correction of aberration active, e.g. controlled by electrical or mechanical means
-
- 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
- G11B7/1398—Means for shaping the cross-section of the beam, e.g. into circular or elliptical cross-section
-
- 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
- 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
- G11B2007/13727—Compound lenses, i.e. two or more lenses co-operating to perform a function, e.g. compound objective lens including a solid immersion lens, positive and negative lenses either bonded together or with adjustable spacing
Definitions
- the present invention relates to an optical pickup device, and more particularly to an optical pickup device capable of recording and / or reproducing information to / from different optical information recording media.
- laser light sources used as light sources for reproducing information recorded on optical discs and recording information on optical discs have become shorter, for example Laser light sources with wavelengths of 400 to 420 nm are being put into practical use, such as blue-violet semiconductor lasers and blue SHG lasers that convert the wavelength of infrared semiconductor lasers using the second harmonic.
- NAO NAO
- BD Blu-ray Disc
- HD high definition DVD
- HD high definition DVD
- Patent Documents 1 and 2 disclose an optical pickup device capable of recording, recording, and reproducing information with respect to different optical discs in view of such a situation.
- Patent Document 1 International Publication No. 03Z91764 Pamphlet
- Patent Document 2 JP 2005-209299 A
- the optical path difference providing structure typified by the diffractive structure forms a fine step according to the wavelength of the incident light beam, and there is a problem in that it is expensive if it is provided on a glass objective optical element.
- the present invention has been made in view of an enormous problem, and has a relatively simple configuration, and is an optical recording and / or reproducing information that can be interchanged with different optical information recording media.
- the purpose is to provide a pick-up device.
- the optical pickup device includes a first light source that emits a light beam having a wavelength ⁇ 1, a second light source that emits a light beam having a wavelength ⁇ 2 ( ⁇ 1 ⁇ 2), A coupling lens disposed in a common optical path through which the first light beam and the second light beam pass; a first objective optical element having an optical surface made only of a refractive surface; and an optical surface made only of a refractive surface.
- a first light beam having the wavelength ⁇ 1 emitted from the first light source passes through the coupling lens and is condensed by the first objective optical element.
- a condensed spot can be formed on the information recording surface of the first optical information recording medium having a protective layer thickness t1.
- the first light beam having the wavelength ⁇ 1 emitted from the first light source passes through the coupling lens and is condensed by the second objective optical element, and has a protective layer thickness t2 (t2> tl).
- the second optical information recording medium can form a focused spot on the information recording surface of the second optical information recording medium, and the second light flux having the wavelength ⁇ 2 emitted from the second light source can pass through the coupling lens.
- An optical pickup device capable of forming a focused spot on an information recording surface of a recording medium,
- the coupling lens is a lens
- the protective layer thickness is t4 (t4> t3) and
- the wavefront aberration is 0.03 rms or more in the condensing spot formed on the information recording surface of the fourth optical information recording medium having a larger track pitch than the third information recording medium.
- the optical surfaces of the first objective optical element and the second objective optical element are formed only by refractive surfaces, so that even if they are made of glass, they can be formed at low cost.
- the first objective optical element can be optimized and designed for the first light flux and the protective layer tl of the first optical information recording medium, it is suitable for the first optical information recording medium.
- information can be recorded and Z or reproduced.
- the second objective optical element is used in common for the first light flux and the second light flux, but the protective layer t2 of the second optical information recording medium and the third optical information recording medium. When the protective layer t3 is the same, it is not necessary to consider the difference in the protective layer thickness, so the design is easy and the cost is low. Can.
- the chromatic aberration based on the wavelength difference between the first light beam and the second light beam can be obtained by displacing the coupling lens to either the second position or the third position, to the second objective optical element. It can be corrected appropriately by changing the divergence angle.
- the optical pickup device is the invention according to claim 1, wherein at least one of the first to third optical information recording media is a plurality of information recording media. And the coupling lens is displaced in the optical axis direction according to the information recording surface condensed by the objective optical element, so that the information recording surface is arranged in multiple layers. Information can be properly recorded and Z or reproduced on an optical information recording medium.
- the optical pickup device wherein the first light source that emits a light beam having a wavelength ⁇ 1, a second light source that emits a light beam having a wavelength ⁇ 2 ( ⁇ 1 ⁇ 2), Diffraction arranged in a common optical path through which the first light beam and the second light beam pass, and an emission angle when the light beam having the wavelength ⁇ 1 passes is different from an emission angle when the light beam having the wavelength ⁇ 2 passes.
- a force coupling lens having a structure and a spherical aberration amount when the light beam having the wavelength ⁇ 1 passes through and a spherical aberration amount when the light beam having the wavelength ⁇ 2 pass through are arranged in the common optical path so as to be different from each other.
- An aberration correction mechanism a first objective optical element having an optical surface made only of a refractive surface, and a second objective optical element having an optical surface made only of a refractive surface, and is emitted from the first light source.
- the emitted first light beam having the wavelength ⁇ 1 has the coupling lens and the aberration compensation. Passing through the mechanism and condensed by the first objective optical element, a focused spot can be formed on the information recording surface of the first optical information recording medium having a protective layer thickness tl.
- the first light flux having the wavelength ⁇ 1 emitted from the first light source passes through the coupling lens and the aberration correction mechanism, and is condensed by the second objective optical element, and has a protective layer thickness t2 (t2> tl) can be formed on the information recording surface of the second optical information recording medium, and the second light flux having the wavelength ⁇ 2 emitted from the second light source And the aberration correction mechanism, and is collected by the second objective optical element, has a protective layer thickness t3 (0.9t2 ⁇ t3 ⁇ l.It2), and has a track pitch larger than that of the second information recording medium.
- a focused spot is formed on the information recording surface of the third optical information recording medium with a large Toga Now that you can! /
- the first light beam is used to focus a light spot on the information recording surface of the first optical information recording medium via the first objective optical element.
- a second aberration state suitable for performing a light beam, and using the second light flux, a condensed spot is formed on the information recording surface of the third optical information recording medium via the second objective optical element.
- the protective layer thickness is t4 (t4> t3) and
- the wavefront aberration is 0.03 rms or more in the condensing spot formed on the information recording surface of the fourth optical information recording medium having a larger track pitch than the third information recording medium.
- the optical surfaces of the first objective optical element and the second objective optical element are formed only by refractive surfaces, so that even if they are made of glass, they can be formed at low cost.
- the first objective optical element can be optimized and designed for the first light flux and the protective layer tl of the first optical information recording medium, it is suitable for the first optical information recording medium.
- information can be recorded and Z or reproduced.
- the second objective optical element is used in common for the first light flux and the second light flux, but the protective layer t2 of the second optical information recording medium and the third optical information recording medium. When the protective layer t3 is the same, it is not necessary to consider the difference in the protective layer thickness, so that the design is easy and the cost can be reduced.
- chromatic aberration based on the wavelength difference between the first light flux and the second light flux is caused by the light flux that has passed through the coupling lens and the aberration correction mechanism!
- the aberration correction mechanism may correct other factors.
- Other factors include, for example, the difference in the oscillation wavelength of each laser diode (so-called wavelength characteristics) depending on the production lot, and correction of aberrations (temperature correction) caused by the temperature rise with use. It can be configured to do better.
- the optical pickup device is a first light source that emits a light beam having a wavelength ⁇ 1, a second light source that emits a light beam having a wavelength ⁇ 2 ( ⁇ 1 ⁇ 2), and the first light source.
- a coupling lens disposed in a common optical path through which one light beam and the second light beam pass, and a spherical aberration amount when the light beam having the wavelength ⁇ 1 passes through and a light beam having the wavelength ⁇ 2 disposed in the common optical path.
- An aberration correction mechanism that makes the amount of spherical aberration different when passing through, a first objective optical element that has an optical surface that only acts as a refractive surface, and an exit angle when the light beam of wavelength ⁇ 1 passes through
- a second objective optical element having an optical surface having a diffractive structure with a different emission angle when the light beam having the wavelength ⁇ 2 passes, and the second objective optical element having the wavelength ⁇ 1 emitted from the first light source.
- One light beam passes through the coupling lens and the aberration correction mechanism, and passes through the first pair.
- a condensed spot can be formed on the information recording surface of the first optical information recording medium having a protective layer thickness of tl after being condensed by the optical element, and the emitted from the first light source force.
- the first light flux of wavelength ⁇ 1 passes through the coupling lens and the aberration correction mechanism, and is condensed by the second objective optical element, and is a second optical information recording medium having a protective layer thickness t2 (t2> tl).
- a focused spot can be formed on the information recording surface, and the second light flux having the wavelength ⁇ 2 emitted from the second light source passes through the coupling lens and the aberration correction mechanism.
- a Ruhikaripi Kkuappu apparatus
- the first light beam is used to focus a light spot on the information recording surface of the first optical information recording medium via the first objective optical element.
- a second aberration state suitable for performing a light beam, and using the second light flux, a condensed spot is formed on the information recording surface of the third optical information recording medium via the second objective optical element.
- a parallel beam having a wavelength of 3 enters the second objective optical element.
- the wavefront aberration is 0.03 3 rms or more.
- the optical surfaces of the first objective optical element and the optical surface of the first objective optical element are formed by force only on the refractive surface, so that it can be formed at low cost even if it is made of glass. Furthermore, since the first object optical element can be optimized and designed with respect to the first light flux and the protective layer tl of the first optical information recording medium, it is suitable for the first optical information recording medium. In addition, information can be recorded and Z or reproduced.
- the second objective optical element is used in common for the first light flux and the second light flux, but the protective layer t2 of the second optical information recording medium and the third optical information recording medium.
- the protective layer t3 When the protective layer t3 is the same, it is not necessary to consider the difference in protective layer thickness, so that the design is easy and the cost can be reduced. Note that chromatic aberration based on the wavelength difference between the first light flux and the second light flux can be eliminated by a diffraction structure provided in the second objective optical element. Further, by giving the light beam that has passed through the coupling lens and the aberration correction mechanism a difference between the second aberration state and the third aberration state, a more appropriate light beam can be made incident. . Further, the coupling lens and the aberration correction mechanism may correct other factors. Other factors include, for example, the difference in the oscillation wavelength of each laser diode (so-called wavelength characteristics) depending on the production lot, and the correction of aberrations (temperature correction) caused by the temperature rise with use. It can be configured to do better.
- the optical pickup device is the invention according to claim 3 or 4, wherein the aberration correction mechanism displaces the coupling lens in the optical axis direction. Therefore, the second state and the third state can be created by displacing the coupling lens in the optical axis direction.
- the optical pickup device is the invention according to claim 4 or 5, wherein at least one of the first to third optical information recording media is a plurality. And the coupling lens is displaced in the optical axis direction according to the information recording surface condensed by the objective optical element. Information can be recorded and / or reproduced appropriately on an optical information recording medium arranged in a layer.
- the optical pickup device is characterized in that, in the invention according to Claim 3 or 4, the aberration correction mechanism includes a liquid crystal element. Either the second state or the third state can be created by appropriately driving the liquid crystal element.
- Liquid crystal element refers to an element that gives a predetermined aberration state to a passing light beam by driving with external force supplied with electric power. For example, it is described in JP-A-2004-192719. .
- the optical pickup device is the invention according to claim 7, wherein at least one of the first to third optical information recording media is a plurality of information recording media. And the liquid crystal element is driven so as to give different aberration states to spots on the information recording surface condensed by the objective optical element. Information can be appropriately recorded and Z or reproduced on an optical information recording medium having a multilayered surface.
- the optical pickup device is the invention according to any one of claims 1 to 8, wherein the refractive surface of the second objective optical element is the first object. Optimized for recording and Z or reproducing information on two optical information recording media. When recording and Z or reproducing information on the third optical information recording medium, the wavefront aberration can be appropriately corrected using the coupling lens or the aberration correction mechanism.
- the optical pickup device is the invention according to any one of claims 1 to 8, wherein the refractive surface of the second objective optical element is the third object. It is optimized for recording and reading / reproducing information on / from an optical information recording medium.
- the wavefront aberration can be appropriately corrected by using the coupling lens or the aberration correction mechanism.
- the optical pickup device is the invention according to any one of claims 1 to 8, wherein the refractive surface of the second objective optical element is the second object optical element.
- the information recording medium and the third optical information recording medium are optimized for recording and Z or reproducing information on a virtual optical information recording medium different from the third optical information recording medium.
- the wavefront aberration is appropriately corrected using the coupling lens or the aberration correction mechanism. And the correction amount can be kept small.
- the optical pickup device is the invention according to any one of claims 1 to 11, and the invention according to any one of claims 1 to 11, and the first objective element and the Since one of the second objective elements is selectively inserted into the common optical path, the optical path configuration can be simplified.
- the optical pickup device is arranged in the common optical path according to the invention according to any one of claims 1 to 11 in claims 1 to 11. Since the light beam having the wavelength ⁇ 1 is incident on either the first objective element or the second objective element by using the switching element, the movable portion for switching the objective optical element Can be made unnecessary.
- the optical pickup device is the invention according to any one of claims 1 to 13, wherein the coupling lens is a beam expander or a collimator lens. It is characterized by that.
- the optical pickup device is the optical pickup device according to any one of claims 3 to 14, wherein the light beam having the wavelength ⁇ 1 passes through the diffraction structure.
- the intensity of the second-order diffracted light is the highest, and the intensity of the first-order diffracted light is the highest when a light beam having a wavelength of 2 passes through the diffraction structure. Can be different.
- the optical pickup device is the optical pickup device according to any one of claims 3 to 14, wherein the light beam having the wavelength ⁇ 1 passes through the diffraction structure.
- the intensity of the 0th-order diffracted light is the highest and the intensity of the 1st-order diffracted light is the highest when the light beam of wavelength 2 passes through the diffraction structure. Can be different.
- the optical pickup device is the scope of claims 1 to 16.
- the track pitch TP1 on the information recording surface of the first optical information recording medium, the track pitch TP2 on the information recording surface of the second optical information recording medium, and the third light The track pitch TP3 on the information recording surface of the information recording medium satisfies the following relationship.
- the optical pickup device according to claim 18 is the optical pickup device according to any one of claims 1 to 17, wherein reflection from the information recording surface of the first to third optical information recording media is performed. Since the light is incident on the common photodetector, the configuration of the optical pickup device is simplified.
- the optical pickup device is the optical pickup apparatus according to any one of claims 1 to 18, wherein the first objective optical element and the second objective optical element are At least one of them is made of glass.
- the objective optical element is, in a narrow sense, disposed at the position closest to the optical information recording medium in a state where the optical information recording medium is loaded in the optical pickup device.
- An element having a light condensing function is pointed out.
- an optical pickup device having a relatively simple configuration and capable of recording and reading or reproducing information in a manner compatible with different optical information recording media.
- FIG. 1 is a schematic cross-sectional view of an optical pickup device that works according to a first embodiment.
- FIG. 2 is a schematic cross-sectional view of an optical pickup device that works on a second embodiment.
- FIG. 3 is a schematic perspective view of a lens holder driving unit.
- Fig. 1 shows that the first optical disc OD1, which is a BD, the second optical disc OD2, which is an HD, and the third optical disc OD3, which is a conventional DVD, can be recorded and played back on the first optical disc.
- BD track pitch TP1, HD track pitch TP2, and DVD track pitch TP3 satisfy the following relationship.
- the lens holder LH is supported at least two-dimensionally by the actuator ACT.
- the actuator ACT is attached to the frame (not shown) of the optical pickup device via the actuator base ACTB so that its position can be adjusted!
- the actuator base ACTB is held by a not-shown actuator so that it can be moved in the left-right direction in the figure.
- the wavefront aberration is 0.073 rms or more in the condensing spot formed on the information recording surface of the CD as the fourth optical information recording medium having a larger track pitch. That is, in this optical pickup device, information cannot be properly recorded and Z or reproduced from the CD, and instead, the optical system and the drive system are simplified.
- the actuator base ACTB is moved by an unillustrated actuator so that it coincides with the optical axis force ⁇ Z4 wavelength plate QWP of the first objective lens OBJ1! /.
- the movable element of the beam expander ⁇ which is a coupling lens, is displaced to the first optical axis position.
- the light enters the first collimating lens CL1 and becomes a parallel light beam.
- the light beam emitted from the first collimating lens CL1 passes through the dichroic prism DPI, and is a diffraction that is an optical means for separating the light beam emitted from the light source into a main beam for recording and reproduction and a sub beam for detecting a tracking error signal. Passes through the grating G, and further passes through the polarizing beam splitter PBS and the beam expander EXP.
- the light beam modulated and reflected by the information pits on the information recording surface again passes through the first objective lens OBJl, ⁇ ⁇ four-wave plate QWP, beam expander EXP, and is reflected by the polarization beam splitter PBS, Furthermore, since it passes through the sensor lens SL and enters the light receiving surface of the photodetector PD, a read signal of information recorded on the first optical disk OD1 can be obtained using the output signal.
- focus detection and track detection are performed by detecting a change in the amount of light due to a change in the shape and position of the spot on the photodetector PD. Based on this detection, the actuator ACT is moved so that the first objective lens OBJ1 is moved together with the lens holder LH so that the light beam from the first semiconductor laser LD1 is imaged on the information recording surface of the first optical disk OD1. Drive.
- the actuator base ACTB is moved by an actuator (not shown), and the optical axis force of the second objective lens OBJ2 ⁇ ⁇ coincides with the optical axis of the four-wave plate QWP. It will be like! /.
- the movable element of the beam expander EXP which is a coupling lens, is displaced to the second optical axis position.
- the light beam emitted from the second collimating lens CL2 is reflected by the first dichroic prism DPI, passes through the diffraction grating G, and further passes through the polarization beam splitter PBS and the beam expander EXP.
- the light beam modulated and reflected by the information pits on the information recording surface again passes through the second objective lens OBJ2, ⁇ ⁇ 4 wavelength plate QWP, beam expander EXP, is reflected by the polarization beam splitter PBS, and further Since the light passes through the sensor lens SL and is incident on the light receiving surface of the photodetector PD, a read signal of information recorded on the second optical disk OD2 can be obtained using the output signal.
- focus detection and track detection are performed by detecting a change in the amount of light due to a change in the shape of the spot and a change in position on the photodetector PD. Based on this detection, the actuator ACT is moved so that the second objective lens OBJ2 is moved together with the lens holder LH so that the light beam from the second semiconductor laser LD2 is imaged on the information recording surface of the second optical disk OD2. Drive.
- the actuator base ACTB is moved by an unillustrated actuator so that the optical axis force ⁇ of the second objective lens OBJ2 coincides with the optical axis of the four-wave plate QWP! /.
- the movable element of the beam expander EXP which is a coupling lens, is displaced to the third optical axis position.
- the light beam emitted from the second collimating lens CL2 is reflected by the first dichroic prism DPI, passes through the diffraction grating G, and further passes through the polarization beam splitter PBS and the beam expander EXP.
- a light collecting spot is formed here.
- Focus detection and track detection are performed by detecting a change in the amount of light due to a change in the shape and position of the spot on the photodetector PD. Based on this detection, the actuator ACT is moved so that the second objective lens OBJ2 is moved together with the lens holder LH so that the light beam from the second semiconductor laser LD2 is imaged on the information recording surface of the third optical disk OD3. Drive.
- the movable element of the beam expander EXP is displaced in the optical axis direction so that any information recording surface can be obtained.
- information can be recorded and Z or reproduced.
- the optical surface of the first objective lens OBJ1 and the optical surface of the second objective lens OBJ2 from only the refractive surface, it can be formed at low cost even if it is made of glass. Furthermore, since the first objective lens OBJ1 can be optimized and designed for the first light flux having the wavelength ⁇ 1 and the protective layer tl of the first optical disc OD1, the first objective lens OBJ1 is suitable for the first optical disc OD1. Information can be recorded and Z or reproduced.
- the second objective lens OBJ2 is used in common for the first light flux having the wavelength ⁇ 1 and the second light flux having the wavelength 2; however, the protective layer t2 of the second optical disk OD2 and the third light flux are used.
- FIG. 2 shows information recording Z playback on all of the first optical disc OD1, which is a BD, the second optical disc OD2, which is an HD, and the third optical disc OD3, which is a conventional DVD.
- FIG. 5 is a schematic cross-sectional view of an optical pickup device that works on the second embodiment.
- BD track pitch TP1, HD track pitch TP2, and DVD track pitch TP3 satisfy the following relationship.
- the lens holder LH is supported at least two-dimensionally by the actuator ACT.
- the actuator ACT is attached to the frame (not shown) of the optical pickup device via the actuator base ACTB so that its position can be adjusted!
- the actuator base ACTB is held by a not-shown actuator so that it can be moved in the left-right direction in the figure.
- the intensity of the second-order diffracted light is highest when a light beam with a wavelength of ⁇ 1 is incident, and the first time when a light beam with a wavelength of ⁇ 2 is incident.
- a diffraction structure is formed as an aberration correction mechanism that maximizes the intensity of the folded light.
- the wavefront aberration is 0.073 rms or more in the condensing spot formed on the information recording surface of the CD as the fourth optical information recording medium having a larger track pitch. That is, in this optical pickup device, information cannot be properly recorded and Z or reproduced from the CD, and instead, the optical system and the drive system are simplified.
- a condensing spot suitable for the information recording surface of the CD can be obtained by making the diffractive structure of the COL that is the coupling lens (or collimating lens) finer. Theoretically, it can be formed. However, if the diffractive structure becomes finer, the manufacturing difficulty increases and the diffraction efficiency also decreases, resulting in an increase in cost.
- the coupling lens (or collimating lens) COL is further displaced in the optical axis direction to change the magnification of the light beam incident on the second objective lens ( Specifically, a means of finite divergence is conceivable, but in this case, a drive mechanism is required as a result, resulting in an increase in the size of the entire pickup. Furthermore, finite divergent light is incident on the second objective lens, and coma is greatly generated with respect to the image height during tracking (oblique incidence of the light beam).
- the light beam emitted from the first collimating lens CL1 passes through the dichroic prism DPI, and is a diffraction grating which is an optical means for separating the light beam emitted from the light source into a main beam for recording / reproducing and a sub beam for detecting a tracking error signal. Passes through G, and further passes through polarization beam splitter PBS and coupling lens COL.
- the light beam modulated and reflected by the information pits on the information recording surface passes again through the first objective lens OBJl, ⁇ ⁇ four-wave plate QWP, and the coupling lens COL, and is reflected by the polarization beam splitter PBS, Furthermore, since it passes through the sensor lens SL and enters the light receiving surface of the photodetector PD, a read signal of information recorded on the first optical disk OD1 can be obtained using the output signal.
- focus detection and track detection are performed by detecting a change in the amount of light due to a change in the shape and position of the spot on the photodetector PD. Based on this detection, the actuator ACT is moved so that the first objective lens OBJ1 is moved together with the lens holder LH so that the light beam from the first semiconductor laser LD1 is imaged on the information recording surface of the first optical disk OD1. Drive.
- the actuator base ACTB is not connected to the actuator (not shown). It is assumed that the optical axis force of the second objective lens OBJ2 is matched with the optical axis of the quadrupole plate QWP.
- the light beam emitted from the second collimating lens CL2 is reflected by the first dichroic prism DPI, passes through the diffraction grating G, and further passes through the polarizing beam splitter PBS and the coupling lens COL.
- the light beam modulated and reflected by the information pits on the information recording surface again passes through the second objective lens OBJ2, ⁇ / 4 wavelength plate QWP, and coupling lens COL, and is reflected by the polarization beam splitter PBS, Furthermore, since it passes through the sensor lens SL and enters the light receiving surface of the photodetector PD, a read signal of information recorded on the second optical disk OD2 can be obtained using the output signal.
- focus detection and track detection are performed by detecting a change in the amount of light due to a change in the shape and position of the spot on the photodetector PD. Based on this detection, the actuator ACT is moved so that the second objective lens OBJ2 is moved together with the lens holder LH so that the light beam from the second semiconductor laser LD2 is imaged on the information recording surface of the second optical disk OD2. Drive.
- the actuator base ACTB is moved by an unillustrated actuator so that it matches the optical axis force ⁇ of the second objective lens OBJ2 and the optical axis of the four-wave plate QWP.
- the light beam emitted from the second collimating lens CL2 is reflected by the first dichroic prism DPI, passes through the diffraction grating G, and further passes through the polarizing beam splitter PBS and the coupling lens COL.
- the light beam modulated and reflected by the information pits on the information recording surface again passes through the second objective lens OBJ2, ⁇ / 4 wavelength plate QWP, and coupling lens COL, and is reflected by the polarization beam splitter PBS, Furthermore, since it passes through the sensor lens SL and enters the light receiving surface of the photodetector PD, a read signal of information recorded on the third optical disc OD3 can be obtained using the output signal.
- focus detection and track detection are performed by detecting a change in the amount of light due to a change in the shape of the spot and a change in position on the photodetector PD. Based on this detection, the actuator ACT is moved so that the second objective lens OBJ2 is moved together with the lens holder LH so that the light beam from the second semiconductor laser LD2 is imaged on the information recording surface of the third optical disk OD3. Drive.
- the first optical disc OD1 to the third optical disc OD3 have a multilayer information recording surface
- information is recorded on any information recording surface by inserting a liquid crystal element (not shown) into the optical path. And Z or playback is possible.
- the optical surface of the first objective lens OBJ1 and the optical surface of the second objective lens OBJ2 from only the refractive surface, it can be formed at low cost even if it is made of glass. Furthermore, since the first objective lens OBJ1 can be optimized and designed for the first light flux having the wavelength ⁇ 1 and the protective layer tl of the first optical disc OD1, the first objective lens OBJ1 is suitable for the first optical disc OD1. Information can be recorded and Z or reproduced.
- the second objective lens OBJ2 is used in common for the first light flux having the wavelength ⁇ 1 and the second light flux having the wavelength 2; however, the protective layer t2 of the second optical disk OD2 and the third light flux are used.
- the protective layer t3 of the optical disc OD3 is the same, it is not necessary to consider the difference in the protective layer thickness, so that the design is easy and the cost can be reduced. Note that chromatic aberration based on the wavelength difference between the first light flux and the second light flux can be appropriately corrected by the diffraction structure of the coupling lens COL.
- the configuration of the optical pickup device can be simplified. In the case of using an optical disc having a multilayer information recording surface, a condensing spot may be formed in the layer to be used by appropriately driving a liquid crystal element arranged in the optical path.
- any one of the objective lenses can be inserted into the optical path by moving the lens holder LH that holds the first objective lens OBJ1 and the second objective lens OBJ2.
- the optical path may be switched by a movable mirror or the like as a switching element so that the light beam passes through an objective lens with a V deviation.
- a light source two semiconductor lasers housed in one package, or a so-called two lasers, one package, etc. may be used!
- the third embodiment is greatly different from the second embodiment in that a diffractive structure is provided on the optical surface of the second objective lens OBJ2.
- the function of the diffractive structure is the same as that of the COL that is the coupling lens (or collimating lens) in the second embodiment.
- the optical system and the drive system are simplified. This is the same as the embodiment and the second embodiment.
- the actuator base ACTB is moved by an unillustrated actuator so that the optical axis of the second objective lens OBJ2 coincides with the optical axis of the ⁇ 4-wave plate QWP.
- the light beam emitted from the second collimating lens CL2 is reflected by the first dichroic prism DPI, passes through the diffraction grating G, and further passes through the polarizing beam splitter PBS and the coupling lens COL.
- the second-order diffracted light forms a focused spot.
- the light beam modulated and reflected by the information pits on the information recording surface again passes through the second objective lens OBJ2, ⁇ / 4 wavelength plate QWP, and coupling lens COL, and is reflected by the polarization beam splitter PBS, Furthermore, since it passes through the sensor lens SL and enters the light receiving surface of the photodetector PD, a read signal of information recorded on the second optical disk OD2 can be obtained using the output signal.
- focus detection and track detection are performed by detecting a change in the amount of light due to a change in the shape of the spot and a change in position on the photodetector PD. Based on this detection, the actuator ACT is moved so that the second objective lens OBJ2 is moved together with the lens holder LH so that the light beam from the second semiconductor laser LD2 is imaged on the information recording surface of the second optical disk OD2. Drive.
- the light beam emitted from the second collimating lens CL2 is reflected by the first dichroic prism DPI, passes through the diffraction grating G, and further passes through the polarizing beam splitter PBS and the coupling lens COL. I have.
- the first-order diffracted light forms a focused spot.
- the light beam modulated and reflected by the information pits on the information recording surface again passes through the second objective lens OBJ2, ⁇ / 4 wavelength plate QWP, and coupling lens COL, and is reflected by the polarization beam splitter PBS, Furthermore, since it passes through the sensor lens SL and enters the light receiving surface of the photodetector PD, a read signal of information recorded on the third optical disc OD3 can be obtained using the output signal.
- focus detection and track detection are performed by detecting a change in the amount of light due to a change in the shape and position of the spot on the photodetector PD. Based on this detection, the actuator ACT is moved so that the second objective lens OBJ2 is moved together with the lens holder LH so that the light beam from the second semiconductor laser LD2 is imaged on the information recording surface of the third optical disk OD3. Drive.
- the first optical disk OD1 to the third optical disk OD3 have multiple information recording surfaces, information is recorded on any information recording surface by inserting a liquid crystal element (not shown) into the optical path. And Z or playback is possible.
- the optical surface of the first objective lens OBJ1 By forming the optical surface of the first objective lens OBJ1 only with a refractive surface, even if it is made of glass, it can be formed at low cost. Furthermore, the first objective lens OBJ1 can be designed by optimizing the first light flux having the wavelength ⁇ 1 and the protective layer tl of the first optical disk OD1, so that the first objective lens OBJ1 can be appropriately used for the first optical disk OD1. Information can be recorded and Z or reproduced.
- the second objective lens OBJ2 is commonly used for the first light flux having the wavelength ⁇ 1 and the second light flux having the wavelength ⁇ 2, and has a diffractive structure on the refractive surface.
- the protective layer t2 of OD2 and the protective layer t3 of the third optical disc OD3 are the same, there is no need to consider the difference in the protective layer thickness, so the design can be simplified and the cost can be reduced.
- chromatic aberration based on the wavelength difference between the first light beam and the second light beam can be appropriately corrected by the diffraction structure provided in the objective lens.
- the configuration of the optical pickup device since there is no mechanism for driving the components of the optical system except the objective lens, the configuration of the optical pickup device However, if necessary, for example, the collimator COL may be driven.
- the position in the optical axis direction of the coupling lens COL is set to the second optical disk OD2 It is preferable to use different positions for recording and playback of the third optical disc and for recording and playback of the third optical disc OD3.
- the aberration correction mechanism can be used to more preferably correct other factors.
- Other factors include, for example, the difference in the oscillation wavelength of each laser diode (, so-called wavelength characteristics) depending on the production lot, and correction of aberrations caused by the temperature rise with use (temperature correction). Can be configured to be preferably performed.
- FIG. 3 is a perspective view of a lens holder driving unit that works in another form.
- the lens unit OU ′ shown in FIG. 3 can be arranged in the optical pickup device shown in FIGS. 1 and 2, and is an object lens that condenses the laser light from the semiconductor laser onto the information recording surface of different optical disks.
- This lens unit OU ′ is provided with an operation control circuit (not shown) for controlling the operation of each actuator.
- the objective lenses OBJl and OBJ2 are respectively provided in holes penetrating the flat plate surface of the disk-shaped lens holder LH, and are arranged at equal distances from the center of the lens holder LH. Yes.
- This lens holder LH is rotatably engaged with the upper end portion of the support shaft SH standing from the actuator base ACTB at its center, and below this support shaft SH, A focusing actuator (not shown) is provided.
- a permanent magnet provided at the lower end portion of the support shaft SH and a coil provided around the permanent magnet constitute an electromagnetic solenoid, and the current flowing through the coil is adjusted.
- the reciprocating movement in minute units in the direction along the supporting shaft SH (vertical direction in FIG. 3) is applied to the supporting shaft SH and the lens holder LH, and the focal length is adjusted. ing.
- the lens holder LH is rotated by the tracking actuator TA around the support shaft SH having an axis parallel to the optical axis.
- the tracking actuator TA is provided in close proximity to a pair of tracking coils TCA and TCB provided symmetrically with the support shaft SH sandwiched between the end edge of the lens holder LH and the end edge of the lens holder LH.
- the actuator base ACTB has two pairs of magnets, MGA, MGB, MGC, MGD, which are provided symmetrically across the support shaft SH.
- the positions of the magnets MGA and MGB are set so that the objective lens OBJ1 is on the optical path of the laser beam.
- the positions of the magnets MGC and MGD are set so that the objective lens OBJ2 is on the optical path of the laser beam when facing the magnets MGC and MGD individually.
- the above-mentioned lens holder LH is limited in its rotation range so that the tracking coil TCA and the magnet MGB or the magnet MGD, and the tracking coil TCB and the magnet TGA or the magnet TGC do not face each other. A not-shown stagger is provided.
- the tracking actuator TA is arranged so that the tangential direction of the outer periphery of the circular lens holder LH is orthogonal to the tangential direction of the track of the optical disk, and the lens holder LH is rotated by a minute unit. This is to correct the deviation of the irradiation position of the laser beam track by energizing the operation. Therefore, in order to perform this tracking operation, for example, it is necessary to slightly bias the lens holder LH while keeping the tracking coils TCA and TCB facing the magnets MGA and MGB.
- each tracking coil TCA, TCB is equipped with an iron piece inside, and while this iron piece is attracted to each magnet, it is delicately placed between these magnets.
- the operation control circuit controls the flow of current to each tracking coil TCA and TCB so that a repulsive force is generated.
- the second objective lens OBJ2 is compatible with both the second optical disk (HD DVD) and the third optical disk (DVD)!
- the optical disc to be optimized can be selected as appropriate regardless of whether it has a diffractive surface. If optimized for the second optical disc (HD DVD), it should be compatible with the third optical disc (DVD) by the action of the aberration correction mechanism and diffraction surface. In this case, there is an advantage that it is easy to form a better focused spot for HD DVD. The reverse is also possible
- the first objective lens OBJ1 is US Pat. No. 6411 442, also US Pat. No. 6512640 by the present applicant (both in Japanese priority, Japanese Patent Application No. 11 247294, Japanese Patent Application No. The design described in Hira 2000-60843) is preferably used.
- the design disclosed in Japanese Patent Application Laid-Open No. 2004-101823 by the present applicant can be used.
- the objective lens for HD DVD described in Japanese Patent Application Laid-Open No. 2004-101823 has a diffractive structure for correcting the wavelength characteristics. It is possible to make an optical design that only has power by a known technique.
- a power of 10 for example, 2.5 X 10 _3
- E for example, 2. 5 It shall be expressed using XE-3).
- the optical surface of the objective optical system is formed as an aspherical surface that is axisymmetric about the optical axis and is defined by a mathematical formula in which the coefficients shown in the table are substituted into Equation (1).
- the position in the optical axis direction is X
- the height in the direction perpendicular to the optical axis is h
- the radius of curvature of the optical surface 3 ⁇ 4 is K
- the conic coefficient is K
- the optical path difference given to the light flux of each wavelength is defined by an equation in which the coefficient shown in the table is substituted into the optical path difference function of Formula 2. Is done.
- the optical path difference function ⁇ ( ⁇ ) is h in the direction perpendicular to the optical axis, m in the diffraction order, ⁇ in the wavelength used (emission wavelength of the semiconductor laser), ⁇ ⁇ in the blaze wavelength, and optical path difference.
- the function coefficient is C, it is expressed by Equation 2.
- Table 1 shows the lens data of the first objective lens OBJ1 (including the focal length of the objective lens, the numerical aperture on the image plane side, and the magnification).
- the optical surface of the first objective lens is formed only from the refractive surface.
- Table 2 shows the lens data for the second objective lens OBJ2 (including the focal length of the objective lens, the image plane side numerical aperture, and the magnification), and Table 3 shows the aspheric data.
- the optical surface of the second objective lens is provided with a diffractive structure in addition to the refractive surface. Further, in this example, better focusing spot formation is performed by changing the magnification of the coupling lens.
- a suitable light condensing spot cannot be formed for CD.
- the wavefront aberration is 0.178 A3rms at the focused spot formed on the information recording surface of CD with a large pitch.
- * d2 'and d3' represent the displacement from the second surface to the second 'surface and from the third surface to the third' surface, respectively.
- A2 1. .9063 XE— 3
- A2 +1. .1660XE-2
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Head (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2007502724A JP3972958B2 (ja) | 2005-11-08 | 2006-11-06 | 光ピックアップ装置 |
US11/663,431 US20090196149A1 (en) | 2005-11-08 | 2006-11-06 | Optical pickup apparatus |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2005-323297 | 2005-11-08 | ||
JP2005323297 | 2005-11-08 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2007055166A1 true WO2007055166A1 (ja) | 2007-05-18 |
Family
ID=38023169
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2006/322088 WO2007055166A1 (ja) | 2005-11-08 | 2006-11-06 | 光ピックアップ装置 |
Country Status (5)
Country | Link |
---|---|
US (1) | US20090196149A1 (ja) |
JP (1) | JP3972958B2 (ja) |
KR (1) | KR20080066009A (ja) |
CN (1) | CN101099203A (ja) |
WO (1) | WO2007055166A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9163276B2 (en) | 2011-07-22 | 2015-10-20 | Tohoku University | Method for fabricating stable-isotope-labeled target peptide fragment in mass spectrometry |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5563318B2 (ja) * | 2009-03-02 | 2014-07-30 | キヤノンアネルバ株式会社 | 基板支持装置、基板処理装置、基板支持方法、基板支持装置の制御プログラム及び記録媒体 |
KR101309704B1 (ko) * | 2009-08-19 | 2013-09-17 | 도시바삼성스토리지테크놀러지코리아 주식회사 | 광픽업 장치 |
CN109190484A (zh) * | 2018-08-06 | 2019-01-11 | 北京旷视科技有限公司 | 图像处理方法、装置和图像处理设备 |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2004295983A (ja) * | 2003-03-26 | 2004-10-21 | Tdk Corp | 光ヘッド及びそれを用いた光記録再生装置 |
JP2004319062A (ja) * | 2003-03-31 | 2004-11-11 | Konica Minolta Holdings Inc | 光ピックアップ装置 |
JP2005166227A (ja) * | 2003-05-22 | 2005-06-23 | Konica Minolta Opto Inc | 光ピックアップ装置、光情報記録再生装置、エキスパンダーレンズ、カップリングレンズ、及び色収差補正用光学素子 |
JP2005209299A (ja) * | 2004-01-23 | 2005-08-04 | Pioneer Electronic Corp | 光ピックアップおよび記録再生装置 |
JP2005293707A (ja) * | 2004-03-31 | 2005-10-20 | Konica Minolta Opto Inc | 光ピックアップ装置 |
JP2005310331A (ja) * | 2004-04-26 | 2005-11-04 | Konica Minolta Opto Inc | 光ピックアップ装置の組立方法及び光ピックアップ装置 |
JP2006024351A (ja) * | 2004-07-05 | 2006-01-26 | Samsung Electronics Co Ltd | 光ピックアップ及びそれを採用した光記録及び/または再生機器 |
-
2006
- 2006-11-06 US US11/663,431 patent/US20090196149A1/en not_active Abandoned
- 2006-11-06 WO PCT/JP2006/322088 patent/WO2007055166A1/ja active Application Filing
- 2006-11-06 JP JP2007502724A patent/JP3972958B2/ja not_active Expired - Fee Related
- 2006-11-06 KR KR1020087010644A patent/KR20080066009A/ko not_active Application Discontinuation
- 2006-11-06 CN CNA2006800008793A patent/CN101099203A/zh active Pending
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2004295983A (ja) * | 2003-03-26 | 2004-10-21 | Tdk Corp | 光ヘッド及びそれを用いた光記録再生装置 |
JP2004319062A (ja) * | 2003-03-31 | 2004-11-11 | Konica Minolta Holdings Inc | 光ピックアップ装置 |
JP2005166227A (ja) * | 2003-05-22 | 2005-06-23 | Konica Minolta Opto Inc | 光ピックアップ装置、光情報記録再生装置、エキスパンダーレンズ、カップリングレンズ、及び色収差補正用光学素子 |
JP2005209299A (ja) * | 2004-01-23 | 2005-08-04 | Pioneer Electronic Corp | 光ピックアップおよび記録再生装置 |
JP2005293707A (ja) * | 2004-03-31 | 2005-10-20 | Konica Minolta Opto Inc | 光ピックアップ装置 |
JP2005310331A (ja) * | 2004-04-26 | 2005-11-04 | Konica Minolta Opto Inc | 光ピックアップ装置の組立方法及び光ピックアップ装置 |
JP2006024351A (ja) * | 2004-07-05 | 2006-01-26 | Samsung Electronics Co Ltd | 光ピックアップ及びそれを採用した光記録及び/または再生機器 |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9163276B2 (en) | 2011-07-22 | 2015-10-20 | Tohoku University | Method for fabricating stable-isotope-labeled target peptide fragment in mass spectrometry |
Also Published As
Publication number | Publication date |
---|---|
KR20080066009A (ko) | 2008-07-15 |
CN101099203A (zh) | 2008-01-02 |
US20090196149A1 (en) | 2009-08-06 |
JP3972958B2 (ja) | 2007-09-05 |
JPWO2007055166A1 (ja) | 2009-04-30 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
TWI342017B (en) | Optical pickup device and objective lens for the optical pickup device | |
JP2000131603A (ja) | 光学ヘッド及び記録再生装置 | |
JP2005209299A (ja) | 光ピックアップおよび記録再生装置 | |
JP3972959B2 (ja) | 光ピックアップ装置 | |
JP2004319062A (ja) | 光ピックアップ装置 | |
WO2008075573A1 (ja) | 光ピックアップ装置用の光学素子、光ピックアップ装置及び光ピックアップ装置の組み立て方法 | |
WO2007010770A1 (ja) | 光ピックアップ装置及び光情報記録媒体の記録・再生装置 | |
JP3972958B2 (ja) | 光ピックアップ装置 | |
JP2005044467A (ja) | 光ピックアップ装置 | |
JP2009501405A (ja) | 能動型補正素子、それを採用した互換型光ピックアップ及び光記録及び/または再生機器 | |
JP2007242111A (ja) | 光ピックアップ装置 | |
JP2000285500A (ja) | 光情報記録媒体用光ピックアップ装置、音声および/または画像の記録再生装置および対物レンズ | |
JP2006092671A (ja) | 光ピックアップ装置及び光ディスク用のドライブ装置 | |
JP2009037718A (ja) | 光ピックアップ装置及び対物光学素子 | |
JP2006244656A (ja) | 対物レンズ、光ピックアップ装置、及び光ディスク装置 | |
JP2007242113A (ja) | 光ピックアップ装置 | |
JP4285588B2 (ja) | 光ピックアップ装置の製造方法及び光ピックアップ装置 | |
JP2007317348A (ja) | 光ピックアップおよび光情報処理装置 | |
JP2005182861A (ja) | 対物レンズ,光ピックアップ装置及び光ディスク装置 | |
JP2007242116A (ja) | 光ピックアップ装置 | |
JP2010015658A (ja) | 波長板、光学素子、光ピックアップおよび光情報処理装置 | |
JP2005259214A (ja) | 光ピックアップ装置及びそれを搭載した光ディスクドライブ装置 | |
JP2005293770A (ja) | 光ピックアップ装置 | |
JP2006323917A (ja) | 対物レンズ及び光ピックアップ装置 | |
JP2008152817A (ja) | 光学素子及び光ピックアップ装置 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
WWE | Wipo information: entry into national phase |
Ref document number: 2007502724 Country of ref document: JP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 200680000879.3 Country of ref document: CN Ref document number: 11663431 Country of ref document: US |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
WWE | Wipo information: entry into national phase |
Ref document number: 1020087010644 Country of ref document: KR |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 06823002 Country of ref document: EP Kind code of ref document: A1 |