WO2009136697A2 - 기록매체의 틸트 조정방법 및 조정장치 - Google Patents
기록매체의 틸트 조정방법 및 조정장치 Download PDFInfo
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- WO2009136697A2 WO2009136697A2 PCT/KR2009/001962 KR2009001962W WO2009136697A2 WO 2009136697 A2 WO2009136697 A2 WO 2009136697A2 KR 2009001962 W KR2009001962 W KR 2009001962W WO 2009136697 A2 WO2009136697 A2 WO 2009136697A2
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- WIPO (PCT)
- Prior art keywords
- recording medium
- tilt
- error signal
- gap error
- adjusting
- Prior art date
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- 238000000034 method Methods 0.000 title claims abstract description 39
- 230000003287 optical effect Effects 0.000 claims description 39
- 230000008859 change Effects 0.000 claims description 15
- 230000010287 polarization Effects 0.000 description 11
- 230000007423 decrease Effects 0.000 description 9
- 238000000926 separation method Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 230000015572 biosynthetic process Effects 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 5
- 238000003786 synthesis reaction Methods 0.000 description 5
- 238000012937 correction Methods 0.000 description 3
- 230000003247 decreasing effect Effects 0.000 description 3
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000007654 immersion Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000001093 holography Methods 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
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Classifications
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- 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
- G11B7/0945—Methods for initialising servos, start-up sequences
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- 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
- G11B7/082—Aligning the head or the light source relative to the record carrier otherwise than during transducing, e.g. adjusting tilt set screw during assembly of head
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- 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
- G11B7/1387—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector using the near-field effect
Definitions
- the present invention relates to a tilt adjustment method and an adjustment device of a recording medium, and more particularly, to a tilt adjustment method of a recording medium capable of automatically compensating for a tilt error occurring between a lens of the optical recording device and the recording medium. It relates to an adjusting device.
- Blu-ray For example, Blu-ray, HD-DVD, etc.
- a DVD has a recording capacity of about 4.7 GB
- a Blu-ray disc has a recording capacity of about 25 GB.
- the dual near field storage method has a near field forming lens such as a solid immersion lens (SIL) to increase the recording density by increasing the numerical aperture (NA) to about two.
- the near field type disk has a recording capacity of 140 GB to 160 GB, and the numerical aperture (NA) must be much higher than that of a conventional optical disk in order to record on the disk with high density. Therefore, the numerical aperture is increased by forming a SIL having a shape such as a hemisphere on the front surface of the objective lens.
- the near field optical system that realizes such near field information recording technology enables high density recording and reproduction by overcoming the diffraction limit of the far field using SIL.
- an optical pickup reads data recorded on the surface of the optical disc by irradiating a laser onto the optical disc and detecting the intensity of reflected light.
- the optical pickup should be arranged to be perpendicular to the surface of the optical disk for accurate reading of the data.
- the optical disc may not be exactly perpendicular to the optical pickup.
- the optical disc and the optical pickup deviate from the vertical, and are called tilt, and the tilt needs to be adjusted so that the optical pickup and the optical disc are vertical to compensate for the tilt.
- the tilt margin between them is very small. If the tilt margin is narrow, not only stable servo is impossible, but also a collision between the disk and the lens may occur and scratches may occur.
- the present invention has been made to solve the above problems, and an object of the present invention is to efficiently adjust the tilt between the recording medium and the lens of the recording and reproducing apparatus.
- a tilt adjustment method of a recording medium comprises the steps of: mounting a recording medium in the recording and reproducing apparatus, performing a first tilt compensation when the recording medium is stopped, and a first tilt compensation; And performing a second tilt compensation while rotating the recording medium.
- the performing of the first tilt compensation may include detecting a gap error signal on the recording medium and adjusting an angle of the recording medium based on the detected gap error signal.
- Adjusting the angle of the recording medium may include adjusting the tilted angle in the radial direction of the recording medium and adjusting the tilted angle in the tangential direction of the recording medium.
- the angle of the recording medium can be adjusted so that the value of the gap error signal is minimum.
- the performing of the second tilt compensation may include detecting a gap error signal while the recording medium rotates, and adjusting the angle of the recording medium based on the gap error signal.
- Adjusting the angle of the recording medium may include adjusting the tilted angle in the radial direction of the recording medium and adjusting the tilted angle in the tangential direction of the recording medium.
- the angle of the recording medium can be adjusted so that the change in the magnitude of the gap error signal is minimal.
- the recording medium may be a near field optical recording medium
- the recording and reproducing apparatus may be a near field optical recording and reproducing apparatus.
- the tilt control device of the recording medium controls the tilt driver to adjust the tilt angle of the recording medium and the tilt drive to perform the tilt adjustment in the state in which the recording medium is stopped and the recording medium rotates, respectively.
- a tilt control unit controls the tilt driver to adjust the tilt angle of the recording medium and the tilt drive to perform the tilt adjustment in the state in which the recording medium is stopped and the recording medium rotates, respectively.
- the tilt driver may include a first tilt driver to adjust the tilted angle in a tangential direction of the recording medium and a second tilt driver to adjust the tilted angle in the radial direction of the recording medium.
- the apparatus may further include a gap error signal detector configured to detect a gap error signal from the recording medium, and the tilt controller may control the tilt driver based on the gap error signal input from the gap error signal detector.
- the tilt controller may control the tilt driver so that the value of the gap error signal is minimum while the recording medium is stopped.
- the tilt controller may control the tilt driver to minimize the change in the magnitude of the gap error signal.
- the tilt adjusting method and the adjusting device of the recording medium according to the present invention it is possible to automatically correct the tilt error between the recording medium and the lens. As a result, improved playback quality can be realized and system reliability can be ensured.
- FIG. 1 is a flowchart illustrating a tilt adjustment method of a recording medium according to an embodiment of the present invention.
- FIG. 2 is a schematic diagram showing tilt between a recording medium and a lens of a recording / playback apparatus.
- 3 is a graph showing the relationship between the tilt angle and the gap error signal when the recording medium is stopped.
- FIG. 4 is a graph showing a relationship between a tilt angle and a change width of a gap error signal in a state where the recording medium is rotated.
- 5 and 6 are graphs showing the magnitude of a gap error signal over time at a particular tilt angle of FIG. 4.
- FIG. 7 is a block diagram of a tilt adjustment apparatus of a recording medium according to an embodiment of the present invention.
- FIG 8 and 9 are plan and cross-sectional views of the recording / playback apparatus according to the embodiment of the present invention.
- 10 and 11 are plan views and cross-sectional views showing the first tilt driver and the disk driver.
- 12 and 13 are a plan view and a cross-sectional view showing the configuration of the first tilt driver.
- FIG. 14 is a block diagram of a recording / playback apparatus according to an embodiment of the present invention.
- 15 is a flowchart showing a tilt adjustment method of a recording medium according to a second embodiment of the present invention.
- FIG. 1 is a flowchart illustrating a tilt adjustment method according to an embodiment of the present invention.
- NFR near field recording
- tilt refers to a slope occurring between a solid immersion lens (SIL) and a recording medium provided in an optical recording / reproducing apparatus using a near field.
- SIL solid immersion lens
- the gap error signal is detected in the state in which the recording medium is stopped (S20), and the tilt is adjusted in the state where the recording medium is stopped based on the gap error signal ( S30, S40).
- FIG. 2 is a schematic diagram showing the tilt between the recording medium and the SIL 10 of the recording and reproducing apparatus
- FIG. 3 is a graph showing the gap error signal according to the tilt.
- the gap error signal is minimized.
- the gap error signal is increased. do.
- the angle of the recording medium 100 should be adjusted to minimize the gap error signal.
- the tilt between the recording medium 100 and the SIL 10 may be divided into a tilt component in a radial direction and a tilt component in a tangential direction.
- the tilt in the radial direction is adjusted (S30).
- the recording medium is tilted at a predetermined angular interval with respect to the SIL.
- the tilting stops. That is, the gap error signal is used as the tilt correction feedback signal as described above.
- the tilt in the tangential direction is adjusted (S40).
- the method for compensating the tilt in the radial direction may be applied in the same manner. That is, the recording medium is inclined with respect to the SIL in any tangential direction at predetermined angular intervals. At this time, it is determined whether the gap error signal level decreases and converges, and if the gap error signal level increases, it is inclined at a predetermined angular interval in the opposite manner. In this way, when the gap error signal decreases and converges to any arbitrary value, the tilting stops.
- the tilt compensation in the radial direction is performed first and the tangential tilt in the following is described as compensation.
- the order may be changed, and the tilt compensation in both directions may be performed simultaneously.
- the tilt in the radial direction can be compensated by adjusting the angle with respect to the recording medium of the pickup device 20, the tangential tilt can be compensated by adjusting the angle of the disc drive unit of the recording and playback apparatus.
- the reverse may be performed.
- the angle between the recording medium and the SIL is sequentially adjusted to find a time point at which the gap error signal is minimized.
- the reason for the tilt adjustment while the recording medium is stopped is to prevent the strong collision of the recording medium and SIL during rotation, which may be caused by excessive tilt error, to prevent damage to the SIL or the recording medium, and to obtain a stable gap error signal. For sake.
- the gap error signal is detected (S60) while the recording medium is rotated (S50), and the tilt angles are adjusted (S70 and S80) while the recording medium is rotated based on the gap error signal.
- FIG. 4 is a graph showing the variation of the gap error signal according to the tilt angle while the recording medium is rotated, and FIGS. 5 and 6 show the gap error signal with time at specific tilt angles A and B.
- FIG. 4 is a graph showing the variation of the gap error signal according to the tilt angle while the recording medium is rotated
- FIGS. 5 and 6 show the gap error signal with time at specific tilt angles A and B.
- the tilt of the recording medium can be divided into a tilt component in the radial direction and a tilt component in the tangential direction. Therefore, it is necessary to adjust the tilt of the components in each direction.
- the tilt in the radial direction is adjusted (S70).
- the change width of the gap error signal is measured while the recording medium is rotated, the recording medium is inclined with respect to the SIL at a predetermined angular interval.
- the tilting stops when the change width of the initial gap error signal decreases or when the change width of the gap error signal decreases to the minimum by adjusting in the opposite direction.
- the tilt in the tangential direction is adjusted (S80).
- the method for compensating the tilt in the radial direction may be applied in the same manner. That is, the recording medium is tilted with respect to the SIL at predetermined angular intervals. At this time, it is determined whether the change width of the gap error signal is decreased, and if the change width of the gap error signal is increased, it is inclined at a predetermined angular interval in the opposite manner. In this manner, the tilting stops when the change width of the gap error signal becomes minimum.
- the tilt compensation in the radial direction is performed first and the tangential tilt in the following is described as compensation.
- the order may be changed, and the tilt compensation in both directions may be performed simultaneously.
- the tilt in the radial direction can be compensated by adjusting the angle with respect to the recording medium of the pickup device 20, and the tangential tilt can be compensated by adjusting the angle of the disc drive unit in the recording / playback apparatus. .
- the reverse may be performed.
- the tilt is finely adjusted using an actuator to perform recording or reproduction.
- the tilt of the large component that is difficult to compensate with the actuator is compensated for to smoothly reproduce the recording.
- the tilt control apparatus includes a pickup device 20, a first tilt driver 30, a second tilt driver 40, a gap error signal detector 80, and a tilt. And a control unit 90.
- the pickup device 20 irradiates light to the recording medium 100 to record data on the recording medium 100 or to reproduce data recorded on the recording medium 100.
- the pick-up device 20 includes a SIL for making use of a near field.
- the first tilt driver 30 adjusts the tilt by adjusting the angle of the recording medium 100 under the control of the tilt controller 90.
- the first tilt driver 30 may adjust the tilt of the recording medium 100.
- the second tilt driver 40 adjusts the tilt by adjusting the angle of the pickup device 20 under the control of the tilt controller 90.
- the second tilt driver 40 may adjust the tilt of the recording medium 100.
- the gap error signal detector 80 detects a gap error signal based on the optical signal input from the pickup device 20, and transmits the detected gap error signal to the tilt controller 90 to perform tilt adjustment.
- the tilt controller 90 determines whether the tilt is in accordance with the gap error signal input from the gap error signal detector 80, and controls the first tilt driver 30 and the second tilt driver 40 to compensate for the tilt. To control.
- the gap error signal detected by the gap error signal detector 80 is converted into a gap error signal level expressed by a specific voltage value by the tilt controller 90.
- the measured gap error signal level is transmitted to the first and second tilt drivers 30 and 40 and used to compensate for the tilt.
- the tilt controller 90 determines whether the gap error signal level or the variation range of the gap error signal increases or decreases, and if the value decreases, the tilt control unit 90 determines whether the value is minimum, and thus the first tilt driver 30 and the second tilt control unit 90. It is provided to the tilt drive part 40.
- the first tilt driver 30 and the second tilt driver 40 receiving the control signal from the tilt controller 90 compensate the tilt in the tangential direction and the radial direction of the recording medium 100, respectively.
- the tilt control unit 90 may be composed of software or hardware, or may be configured in a manner in which software and hardware interoperate with each other, or may be formed of one component or a plurality of components.
- the first tilt driver 30 and the second tilt driver 40 tilt the pickup device 20 or the recording medium 100 to adjust the tilt.
- Each component of the tilt adjustment apparatus described above may be implemented as software or hardware to perform each of the above functions, or may be implemented by interworking with the software and hardware.
- the recording / playback apparatus includes a pickup device 20, a first tilt driver 30, a second tilt driver 40, a disk drive 50, and first and second pivot support assemblies 60. As shown in FIG. , 70).
- the pickup device 20 includes a pickup drive unit 26, a pickup unit 22 conveyed by the pickup drive unit 26, a guide rail 24 for guiding the transfer of the pickup unit 22, and mounting thereof.
- Pick-up device base 28 for guiding the transfer of the pickup unit 22, and mounting thereof.
- the first tilt driver 30 compensates the tilt of the recording medium by adjusting the angle of the disk driver 50.
- the second tilt driver 40 compensates the tilt of the recording medium by adjusting the angle of the pickup device 20. This will be described later.
- the disk drive unit 50 includes a drive motor 54 and a drive unit base 52 on which the drive motor 54 is mounted.
- the first pivot support assembly 60 and the second pivot support assembly 70 are connected to the second tilt driver 40 and the first tilt driver 30, respectively.
- the first pivotal support assembly 60 and the second pivotal support assembly 70 each include elastic support units 62 and 72, hinge supports 64 and 74 and hinges 66 and 76, respectively.
- the elastic support units 62 and 72 include fixed shafts 62a and 72a and elastic members 62b and 72b, respectively.
- the first tilt driver 30 is mounted to be capable of tilting the drive unit base 52 on which the drive motor 54 is mounted.
- the dome-shaped hinge 76 and the hinge support part 74 are mounted below the drive unit base 52.
- the drive unit base 52 can be tilted in a direction corresponding to with the recording medium.
- 72 is mounted to the drive unit base 52.
- the elastic support unit 72 includes a fixed shaft 72a and an elastic member 72b.
- the fixed shaft 72a constituting the elastic support unit 72 as described above may be mounted in a state of penetrating the driving unit base 52, or may be mounted in a state adjacent to the driving unit base 52.
- the elastic member 72b is disposed between the fixed shaft 72a and the drive unit base 52 to apply an elastic force to the drive unit base 52. That is, the drive unit base 52 may be configured to be pressed downward.
- the elastic support unit 72 may be configured in such a way that the driving unit base 52 may have a potential rotational force applied in one direction about the hinge 76 and the hinge support 74. At this time, the direction of the potential rotational force applied to the drive unit base 52 by the elastic support unit 72 is applied in the direction in which the first tilt drive unit 30 described below is located. This is the rotational force in the direction opposite to the direction of the rotational force applied by the elastic support unit 72 around the hinge 76 and the hinge support portion 74 by the drive unit base 52 by the first tilt drive unit 30 Because it must be configured to be applied.
- the first tilt driver 30 and the second tilt driver 40 may be configured in a kind of cam structure such that the driving unit base 52 and the pickup device 20 can be tilted, respectively.
- the first tilt driver 30 and the second tilt driver 40 may include a driving motor configured to rotate a configuration having a cam structure and a configuration having a cam structure. An embodiment thereof will be described in more detail as follows. Hereinafter, the first tilt driver 30 will be described as an example, and a description of the second tilt driver 40 having a similar configuration will be omitted.
- the first tilt drive unit 30 is a driving device 310 for generating a rotational force and the tilting drive unit base 320 and the tilting drive unit base 320 to receive the rotational force from the drive unit 310 It is coupled to the cam unit 330 is disposed in contact with the drive unit base (52).
- the first tilt driver 30 disposed adjacent to the drive unit base 52 will be described in more detail.
- the gear unit 324 is disposed on the side of the tilt drive unit base 320 constituting the first tilt driver 30. ) Is formed, the lower portion is equipped with a rotating shaft 322, the upper portion is configured to be mounted to the cam portion 330.
- the tilting drive unit base 320 in which the gear part 324 is formed on the side is disposed at one side of the drive unit base 52 by the rotation shaft 322 mounted at the bottom thereof.
- the cam part 330 coupled to the upper part of the tilting drive unit base 320 is in contact with one end of the drive unit base 52 so that the drive unit base 52 is elastic with the hinge 76 and the hinge support part 74 as the center. It is configured to apply the rotational force in a direction opposite to the direction of the rotational force applied by the support unit 72.
- the driving device 310 includes a driving motor 312 for generating a rotational force and a gear unit 314 for transmitting the rotational force generated from the driving motor 312 to the tilting drive unit base 320.
- the gear unit 314 is configured to engage with the gear unit 324 formed on the side of the tilting drive unit base 320 to apply a rotational force
- the gear unit 314 may be composed of a plurality of gear assemblies, the drive It may also consist of a pinion gear that is generally coupled to the motor 312.
- the rotational force generated by the drive motor 312 is transmitted to the cam unit 330 through the gear unit 314 and the tilting drive unit base 320.
- the cam portion 330 is rotated while its upper surface is in contact with the end of the driving unit base 52.
- the drive unit base 52 When the top dead center, the bottom dead center or the middle point of the cam unit 330 is located at the end of the drive unit base 52 by such rotation, the drive unit base 52 is in a clockwise, counterclockwise or equilibrium state. The rotational state around the hinge 76 and the hinge support 74 is determined.
- the recording and reproducing apparatus detects the light irradiated from the pickup 1100 and reflected on the recording medium 1200, and controls the tilting or the tracking of the track according to the detected light so that the light is irradiated at the correct position.
- the optical system included in the pickup 1100 will be described in detail.
- the pickup 1100 includes a light source 110, and the light source 110 may be a laser having good directivity, such as a laser diode. Light irradiated onto the recording medium from the light source 110 may be parallel light. Therefore, the recording and reproducing apparatus according to the embodiment of the present invention includes a collimate lens 120 for paralleling the path of the light emitted from the light source 110.
- the separation synthesis units 130 and 140 separate paths of light incident in the same direction or synthesize paths of light incident in different directions.
- the data recording and storage device includes a first separating and combining unit 130 and a second separating and combining unit 140.
- the first separation synthesis unit 130 passes a portion of the incident light and reflects the portion.
- the first separation synthesis unit 130 may be a non-polarized beam splitter (NBS).
- the second separation synthesis unit 140 may be a polarized beam splitter (PBS) that passes only polarization in a specific direction according to the polarization direction.
- PBS polarized beam splitter
- the second separation synthesis unit 140 may be configured to pass only the polarization component in the vertical direction and reflect the polarization component in the horizontal direction. In contrast, only the polarization component in the horizontal direction passes and the polarization in the vertical direction.
- the component may be configured to reflect.
- the lens unit 150 is positioned close to the recording medium 1200 to irradiate light to a predetermined area of the recording medium 1200.
- An optical conversion surface 160 and an expander 190 are provided between the lens unit 150 and the second optical separation unit 140.
- the light conversion surface 160 converts the polarization directions of the light incident on the recording medium 1200 and the reflected light.
- the light conversion surface 160 is a quarter wave plate
- the light conversion surface 160 polarizes the light incident on the recording medium 1200 to the left and polarizes the light reflected from the recording medium 1200. Polarize right.
- the reflected light passing through the light conversion surface 160 is converted in the polarization direction in a direction different from the incident light, and has a phase difference of 90 degrees with each other.
- the reflected light whose polarization direction is converted as described above does not pass through the second light separation unit 140 through which incident light passes and is reflected and incident to the first detection unit 70.
- a part of the reflected light is distorted in polarized light and passes through the second optical splitter 140, and is reflected by the first optical splitter 130 to be incident to the second detector 180.
- This is a phenomenon in which part of the reflected light is distorted due to polarization because the numerical aperture NA of the lens unit 150 is greater than one.
- the first detector 170 and the second detector 180 receive the reflected light to generate an electrical signal corresponding thereto.
- the first detector 170 and the second detector 180 generate a slope error signal and a gap error signal, respectively.
- the expander 190 adjusts the size of the cross section of the incident light.
- the expander 190 increases the cross-sectional area of the light incident on the lens unit 150 so as to more efficiently perform the tilt adjustment.
- FIG. 15 is a flowchart illustrating a tilt adjustment method of a recording medium according to a second embodiment of the present invention.
- contact conditions are set for the portion where the light is actually located in the SIL portion. Therefore, the larger the size of the incident or emitted light cross-sectional area of the bottom surface of the SIL, the more advantageous for signal acquisition for tilt adjustment. Therefore, in the present exemplary embodiment, the cross-sectional area of light incident on the lens unit is maximized using the expander 190 (S100). In this case, the cross-sectional area of the light may be increased by adjusting the relative position of the expander 190.
- the gap error signal is measured (S120) and the tilt is adjusted in the radial direction and the tangential direction (S130) while the recording medium is stopped by the method described in the first embodiment of the present invention.
- the light cross-sectional area is adjusted again using the expander 190 (S150).
- the present embodiment it is possible to set the contact and tilt conditions for the wider area of the SIL bottom surface. Therefore, the stability of the gap servo can be substantially increased.
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Abstract
Description
Claims (18)
- 기록재생장치에 기록매체를 장착하는 단계;상기 기록매체가 정지된 상태에서 제1 틸트 보상을 수행하는 단계; 및상기 제1 틸트 보상이 수행된 상기 기록매체를 회전시킨 상태에서 제2 틸트 보상을 수행하는 단계를 포함하는 기록매체의 틸트 조정방법.
- 제1 항에 있어서,상기 제1 틸트 보상을 수행하는 단계는,상기 기록매체에서 갭 에러 신호를 검출하는 단계; 및상기 검출된 갭 에러 신호에 근거하여 상기 기록매체의 각도를 조절하는 단계를 포함하는 기록매체의 틸트 조정방법.
- 제2 항에 있어서,상기 기록매체의 각도를 조절하는 단계는,상기 기록매체의 반경(radial) 방향으로 틸트된 각도를 조절하는 단계; 및상기 기록매체의 접선(tangential) 방향으로 틸트된 각도를 조절하는 단계를 포함하는 기록매체의 틸트 조정방법.
- 제2 항에 있어서,상기 갭 에러 신호의 값이 최소가 되도록 상기 기록매체의 각도를 조절하는 기록매체의 틸트 조정방법.
- 제2 항에 있어서,상기 갭 에러 신호를 검출하는 단계는,상기 갭 에러 신호 검출을 위한 광 단면적의 크기를 확대하는 단계; 및상기 확대된 광으로부터 갭 에러 신호를 검출하는 단계를 포함하는 기록매체의 틸트 조정방법.
- 제5 항에 있어서,상기 광 단면적의 크기를 확대하는 단계는,상기 광이 입사되는 렌즈의 크기에 대응하여 상기 광 단면적을 최대화하는 단계를 더 포함하는 기록매체의 틸트 조정방법.
- 제1 항에 있어서,상기 제2 틸트보상을 수행하는 단계는,상기 기록매체가 회전하는 상태에서 갭 에러 신호를 검출하는 단계;상기 갭 에러 신호에 근거하여 상기 기록매체의 각도를 조절하는 단계를 포함하는 기록매체의 틸트 조정방법.
- 제7 항에 있어서,상기 기록매체의 각도를 조절하는 단계는,상기 기록매체의 반경(radial)방향으로 틸트된 각도를 조절하는 단계; 및상기 기록매체의 접선(tangential)방향으로 틸트된 각도를 조절하는 단계를 포함하는 기록매체의 틸트 조정방법.
- 제7 항에 있어서,상기 갭 에러 신호의 크기 변화가 최소가 되도록 상기 기록매체의 각도를 조절하는 기록매체의 틸트 조정방법.
- 제1 항에 있어서,상기 기록매체는 근접장 광 기록매체이고, 상기 기록재생장치는 근접장 광 기록재생장치인 기록매체의 틸트 조정방법.
- 기록매체의 틸트된 각도를 조절하는 틸트 구동부; 및상기 기록매체가 정지된 상태 및 상기 기록매체가 회전하는 상태에서 각각 틸트 조정을 수행하도록 상기 틸트 구동부를 제어하는 틸트 제어부를 포함하는 기록매체의 틸트 조정장치.
- 제11 항에 있어서,상기 틸트 구동부는,상기 기록매체의 접선(tangential) 방향으로 틸트된 각도를 조절하는 제1 틸트 구동부; 및상기 기록매체의 반경(radial) 방향으로 틸트된 각도를 조절하는 제2 틸트 구동부를 포함하는 기록매체의 틸트 조정장치.
- 제11 항에 있어서,상기 기록매체에서 갭 에러 신호를 검출하는 갭 에러 신호검출부를 더 포함하고,상기 틸트 제어부는 상기 갭 에러 신호검출부에서 입력되는 상기 갭 에러 신호에 근거하여 상기 틸트 구동부를 제어하는 기록매체의 틸트 조정장치.
- 제13 항에 있어서,상기 틸트 제어부는 상기 기록매체가 정지한 상태에서 상기 갭 에러 신호의 값이 최소가 되도록 상기 틸트 구동부를 제어하는 기록매체의 틸트 조정장치.
- 제13 항에 있어서,상기 갭 에러 신호 검출을 위한 광 단면적의 크기를 확대하는 익스팬더(expander)를 더 포함하는 기록매체의 틸트 조정장치.
- 제15 항에 있어서,상기 익스팬더는 상기 광이 입사되는 렌즈의 크기에 대응하여 상기 광 단면적을 최대화하는 기록매체의 틸트 조정장치.
- 제13 항에 있어서,상기 틸트 제어부는 상기 갭 에러 신호의 크기 변화가 최소가 되도록 상기 틸트 구동부를 제어하는 기록매체의 틸트 조정장치.
- 제11 항에 있어서,상기 기록매체는 근접장을 이용한 광 기록매체인 기록매체의 틸트 조정장치.
Priority Applications (2)
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US12/991,157 US20110058459A1 (en) | 2008-05-07 | 2009-04-16 | Method and device for adjusting tilt of recording medium |
CN2009801165136A CN102016991A (zh) | 2008-05-07 | 2009-04-16 | 用于调整记录介质的倾斜的方法和设备 |
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KR10-2008-0042463 | 2008-05-07 | ||
KR20080042463 | 2008-05-07 |
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WO2009136697A2 true WO2009136697A2 (ko) | 2009-11-12 |
WO2009136697A3 WO2009136697A3 (ko) | 2010-01-14 |
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PCT/KR2009/001962 WO2009136697A2 (ko) | 2008-05-07 | 2009-04-16 | 기록매체의 틸트 조정방법 및 조정장치 |
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US (1) | US20110058459A1 (ko) |
CN (1) | CN102016991A (ko) |
WO (1) | WO2009136697A2 (ko) |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001357605A (ja) * | 2000-06-14 | 2001-12-26 | Fujitsu Ten Ltd | ディスク装置のスキュー調整方法 |
KR20040028729A (ko) * | 2001-09-11 | 2004-04-03 | 마쯔시다덴기산교 가부시키가이샤 | 광디스크 장치 |
KR20040074488A (ko) * | 2003-02-19 | 2004-08-25 | 삼성전자주식회사 | 광 재생 및 기록 장치의 틸트각 측정 및 보상 방법 |
US20050180283A1 (en) * | 2004-02-12 | 2005-08-18 | Sony Corporation | Tilt control method and optical disc apparatus |
KR20070044271A (ko) * | 2005-10-24 | 2007-04-27 | 엘지전자 주식회사 | 근접장 광 저장장치 및 광 픽업 콘트롤 방법 |
US7315499B2 (en) * | 2002-05-28 | 2008-01-01 | Ricoh Company, Ltd. | Optical disk apparatus, tilt compensation method, program, and information recording medium |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3114661B2 (ja) * | 1997-07-15 | 2000-12-04 | ヤマハ株式会社 | 光ディスク装置のチルト制御装置 |
JP4196675B2 (ja) * | 2001-02-13 | 2008-12-17 | 株式会社ニコン | 保持装置、保持方法、露光装置、およびデバイス製造方法 |
KR100941532B1 (ko) * | 2002-03-26 | 2010-02-10 | 파나소닉 주식회사 | 대물 렌즈 구동 장치, 광헤드 및 광디스크 장치 |
EP1941506A4 (en) * | 2005-10-24 | 2008-12-17 | Lg Electronics Inc | DEVICE AND METHOD FOR RECORDING / READING DATA ON / FROM A RECORDING MEDIUM |
RU2008146412A (ru) * | 2006-04-25 | 2010-05-27 | Конинклейке Филипс Электроникс Н.В. (Nl) | Устройство оптической записи в ближнем поле и способ управления устройством оптической записи в ближнем поле |
-
2009
- 2009-04-16 US US12/991,157 patent/US20110058459A1/en not_active Abandoned
- 2009-04-16 WO PCT/KR2009/001962 patent/WO2009136697A2/ko active Application Filing
- 2009-04-16 CN CN2009801165136A patent/CN102016991A/zh active Pending
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001357605A (ja) * | 2000-06-14 | 2001-12-26 | Fujitsu Ten Ltd | ディスク装置のスキュー調整方法 |
KR20040028729A (ko) * | 2001-09-11 | 2004-04-03 | 마쯔시다덴기산교 가부시키가이샤 | 광디스크 장치 |
US7315499B2 (en) * | 2002-05-28 | 2008-01-01 | Ricoh Company, Ltd. | Optical disk apparatus, tilt compensation method, program, and information recording medium |
KR20040074488A (ko) * | 2003-02-19 | 2004-08-25 | 삼성전자주식회사 | 광 재생 및 기록 장치의 틸트각 측정 및 보상 방법 |
US20050180283A1 (en) * | 2004-02-12 | 2005-08-18 | Sony Corporation | Tilt control method and optical disc apparatus |
KR20070044271A (ko) * | 2005-10-24 | 2007-04-27 | 엘지전자 주식회사 | 근접장 광 저장장치 및 광 픽업 콘트롤 방법 |
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US20110058459A1 (en) | 2011-03-10 |
CN102016991A (zh) | 2011-04-13 |
WO2009136697A3 (ko) | 2010-01-14 |
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