WO2003088225A1 - Information recording medium, information reproducing device, information recorder, and information recording/reproducing device - Google Patents
Information recording medium, information reproducing device, information recorder, and information recording/reproducing device Download PDFInfo
- Publication number
- WO2003088225A1 WO2003088225A1 PCT/JP2003/004785 JP0304785W WO03088225A1 WO 2003088225 A1 WO2003088225 A1 WO 2003088225A1 JP 0304785 W JP0304785 W JP 0304785W WO 03088225 A1 WO03088225 A1 WO 03088225A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- information
- recording
- signal
- pit
- depth
- 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
- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
- G11B7/2407—Tracks or pits; Shape, structure or physical properties thereof
- G11B7/24085—Pits
-
- 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
- G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
- G11B7/005—Reproducing
-
- 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
- G11B7/007—Arrangement of the information on the record carrier, e.g. form of tracks, actual track shape, e.g. wobbled, or cross-section, e.g. v-shaped; Sequential information structures, e.g. sectoring or header formats within a track
-
- 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
Definitions
- the factors that determine the recording density or recording capacity of these optical disks are the light used for recording and reproduction, for example, the wavelength of a semiconductor laser, and the NA (Numerical) of an optical system that can be actually used for this wavelength. Aperture), concave or convex portions corresponding to the recorded information, that is, the pit shape and its depth, and the quality of the error signal obtained from the pit to control the device, etc. ing.
- the present invention provides a high recording density and a large recording capacity that enable generation of a sufficiently large RF signal and a push-pull signal by an optical disc apparatus using an optical system having an NA of 0.75 or more.
- an information reproducing apparatus for reproducing information recorded thereon an information recording apparatus for recording information thereon, and an information recording / reproducing apparatus for performing both such recording and reproduction.
- the information recording medium of the first aspect of the present invention reproduces information by irradiating a light beam through an optical system having a numerical aperture NA of 0.75 or more.
- the depth d of the pit is such that the average width of the pit is W [nm], the taper angle of the pit is 0 [deg], and the actual pit is Is D [nm], Is the apparent depth defined by ,
- an information recording apparatus is an information recording apparatus for recording information on the information recording medium (including various aspects thereof) according to the first aspect of the present invention.
- a recording optical unit for irradiating the recording unit with a recording light beam via an optical system having a numerical aperture NA of 0.75 or more, and a signal for converting an information signal indicating information to be recorded into a recording signal.
- a recording control unit for inputting the recording signal converted by the signal modulation unit to the recording optical unit and controlling a recording operation.
- the signal modulating means indicates information to be recorded.
- FIG. 4 is a graph for explaining the upper limit of the pit depth of the information recording medium of the present invention.
- FIG. 4 is a characteristic diagram showing experimental data on a Shoupuru modulation degree and a pit depth.
- FIG. 5 is a characteristic diagram showing experimental data on pre-avi margin and pit depth for studying the upper limit of the pit depth of the information recording medium of the present invention.
- Fig. 6 is a table summarizing the experimental results of pit depth, push-pull modulation degree, and pre-avi margin. ' ⁇
- FIG. 7 is a characteristic diagram showing experimental data on bottom jitter and defocus margin for examining the lower limit of the pit depth of the information recording medium of the present invention.
- FIG. 9 is a characteristic diagram showing experimental data on bottom jitter and pit depth for studying the lower limit of the depth.
- the depth d of the pit of the information recording medium according to the present invention is set to LZ 8 ⁇ ⁇ ⁇ ⁇ ⁇ / 4. 5 ⁇ , preferably ⁇ / 8 n ⁇ d ⁇ ⁇ / 4.7, or else; I ⁇ 5.5 ⁇ ⁇ d ⁇ ⁇ / 4.5 ⁇ , and more preferably 5.5 ⁇ ⁇ ⁇ ⁇ ⁇ / 4.7.
- the spindle motor 21 mounts the optical disk 10 and rotates at a predetermined rotation speed, that is, a predetermined rotation speed or a predetermined linear speed.
- a rotation error is detected from the reproduced signal by the error signal detection unit 26 based on various synchronization signals, and a control signal is generated by the spindle servo unit 30 based on the error.
- the rotation is controlled by input.
- an error signal detection unit 26 detects a focus and tracking error from a signal reproduced by the optical pickup 22, and based on the error, the focus servo unit 28 and the tracking servo unit 27 respectively perform the control.
- a control signal is generated and input to the optical pickup 22 for control.
- the RF signal processing unit 24 shapes the RF signal reproduced by the optical pickup 22 into a signal suitable for signal processing in a subsequent stage.
- the pit depth of 10 satisfies the above condition; Z 8 n ⁇ d ⁇ 4.5 n, so that a sufficiently large RF signal is generated, which ultimately results in a high SZN ratio (Signal to Noise Ratio) can be reproduced.
- the demodulation unit 25 is for restoring the signal from the signal pre-processed by the RF signal processing unit 24, and restores the original information based on the modulated format.
- an error correction function is also provided, and the restored signal is a speaker if the information is related to sound via the output unit 31; a monitor if the information is related to video; Output to a personal computer.
Landscapes
- Optical Recording Or Reproduction (AREA)
- Optical Record Carriers And Manufacture Thereof (AREA)
- Optical Head (AREA)
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020047016555A KR100682564B1 (ko) | 2002-04-17 | 2003-04-15 | 정보 기록 매체, 정보 재생 장치, 정보 기록 장치 및정보기록/재생 장치 |
AU2003235165A AU2003235165A1 (en) | 2002-04-17 | 2003-04-15 | Information recording medium, information reproducing device, information recorder, and information recording/reproducing device |
EP03723118A EP1496502A4 (en) | 2002-04-17 | 2003-04-15 | INFORMATION RECORDING MEDIUM, INFORMATION REPRODUCER, INFORMATION RECORDER AND INFORMATION RECORDER / REPRODUCER |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2002115329 | 2002-04-17 | ||
JP2002-115329 | 2002-04-17 | ||
JP2002-163416 | 2002-06-04 | ||
JP2002163416A JP2004005864A (ja) | 2002-04-17 | 2002-06-04 | 情報記録媒体、情報再生装置、情報記録装置及び情報記録再生装置 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2003088225A1 true WO2003088225A1 (en) | 2003-10-23 |
Family
ID=29217977
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2003/004785 WO2003088225A1 (en) | 2002-04-17 | 2003-04-15 | Information recording medium, information reproducing device, information recorder, and information recording/reproducing device |
Country Status (7)
Country | Link |
---|---|
US (1) | US7307942B2 (ja) |
EP (1) | EP1496502A4 (ja) |
JP (1) | JP2004005864A (ja) |
KR (1) | KR100682564B1 (ja) |
CN (1) | CN1290095C (ja) |
AU (1) | AU2003235165A1 (ja) |
WO (1) | WO2003088225A1 (ja) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2005310329A (ja) | 2004-04-26 | 2005-11-04 | Sony Corp | 光記録媒体、再生装置、トラッキングサーボ方法 |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH10283683A (ja) * | 1997-02-05 | 1998-10-23 | Sony Corp | 光記録媒体及びその製造方法 |
JPH11250506A (ja) * | 1998-03-03 | 1999-09-17 | Yamaha Corp | 光ディスクおよび光ディスク原盤の露光方法 |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0628952B1 (en) * | 1993-06-08 | 2002-02-20 | Matsushita Electric Industrial Co., Ltd. | Optical disk, and information recording/reproduction apparatus |
US6054199A (en) * | 1996-04-10 | 2000-04-25 | Hitachi Maxell, Ltd. | Optical recording medium |
JP3932578B2 (ja) * | 1996-10-24 | 2007-06-20 | ソニー株式会社 | 対物レンズ及び光学ピックアップ装置 |
JP3104222B2 (ja) * | 1997-05-19 | 2000-10-30 | ソニー株式会社 | 光ディスク装置 |
JPH11213555A (ja) | 1998-01-21 | 1999-08-06 | Pioneer Electron Corp | 情報記録再生装置 |
US6175548B1 (en) * | 1998-06-29 | 2001-01-16 | Sony Corporation | Optical recording medium and optical recording and reproducing apparatus |
CN1287169C (zh) * | 1998-11-09 | 2006-11-29 | 松下电器产业株式会社 | 光信息处理装置和光学元件 |
JP2000242976A (ja) * | 1999-02-19 | 2000-09-08 | Taiyo Yuden Co Ltd | 光情報媒体 |
JP2001291244A (ja) * | 2000-04-04 | 2001-10-19 | Sharp Corp | 光記録媒体、光記録情報の再生方法並びに再生装置 |
KR100694036B1 (ko) * | 2000-06-01 | 2007-03-12 | 삼성전자주식회사 | 그루브와 피트의 깊이가 다른 디스크 및 그 제조방법 |
JP2002008269A (ja) | 2000-06-22 | 2002-01-11 | Sony Corp | 光学記録媒体およびその製造方法 |
JP2002056539A (ja) * | 2000-08-11 | 2002-02-22 | Pioneer Electronic Corp | 光ディスク及びその情報再生装置 |
KR100765736B1 (ko) * | 2000-09-21 | 2007-10-15 | 삼성전자주식회사 | 색수차 보정렌즈를 구비한 광픽업장치 |
US7233554B2 (en) * | 2001-04-17 | 2007-06-19 | Ricoh Company, Ltd. | Disk drive system employing effective disk surface stabilization mechanism |
-
2002
- 2002-06-04 JP JP2002163416A patent/JP2004005864A/ja active Pending
-
2003
- 2003-04-15 KR KR1020047016555A patent/KR100682564B1/ko not_active IP Right Cessation
- 2003-04-15 AU AU2003235165A patent/AU2003235165A1/en not_active Abandoned
- 2003-04-15 EP EP03723118A patent/EP1496502A4/en not_active Withdrawn
- 2003-04-15 WO PCT/JP2003/004785 patent/WO2003088225A1/ja active Application Filing
- 2003-04-15 CN CNB03808225XA patent/CN1290095C/zh not_active Expired - Fee Related
- 2003-04-16 US US10/413,999 patent/US7307942B2/en not_active Expired - Fee Related
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH10283683A (ja) * | 1997-02-05 | 1998-10-23 | Sony Corp | 光記録媒体及びその製造方法 |
JPH11250506A (ja) * | 1998-03-03 | 1999-09-17 | Yamaha Corp | 光ディスクおよび光ディスク原盤の露光方法 |
Non-Patent Citations (1)
Title |
---|
See also references of EP1496502A4 * |
Also Published As
Publication number | Publication date |
---|---|
EP1496502A4 (en) | 2009-03-25 |
US20030198172A1 (en) | 2003-10-23 |
CN1647166A (zh) | 2005-07-27 |
AU2003235165A1 (en) | 2003-10-27 |
EP1496502A1 (en) | 2005-01-12 |
CN1290095C (zh) | 2006-12-13 |
US7307942B2 (en) | 2007-12-11 |
KR100682564B1 (ko) | 2007-02-15 |
JP2004005864A (ja) | 2004-01-08 |
KR20040103955A (ko) | 2004-12-09 |
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