RU2005101636A - Устройство регулирования фокуса - Google Patents
Устройство регулирования фокуса Download PDFInfo
- Publication number
- RU2005101636A RU2005101636A RU2005101636/28A RU2005101636A RU2005101636A RU 2005101636 A RU2005101636 A RU 2005101636A RU 2005101636/28 A RU2005101636/28 A RU 2005101636/28A RU 2005101636 A RU2005101636 A RU 2005101636A RU 2005101636 A RU2005101636 A RU 2005101636A
- Authority
- RU
- Russia
- Prior art keywords
- control device
- focus control
- length
- average
- pulse train
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
- G11B7/085—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
- G11B7/08511—Methods for track change, selection or preliminary positioning by moving the head with focus 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
- G11B7/08—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
-
- 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
Landscapes
- Optical Recording Or Reproduction (AREA)
- Moving Of The Head For Recording And Reproducing By Optical Means (AREA)
- Optical Head (AREA)
- Optical Record Carriers And Manufacture Thereof (AREA)
Claims (5)
1. Устройство регулирования фокуса для фокусирования света, испускаемого источником света на записывающий слой носителя записи посредством объектива, в котором полоса захвата для достижения фокусировки определяется из следующего: нижний предел определяется на основании средней длины последовательности импульсов; и верхний предел определяется на основе шага дорожки.
2. Устройство регулирования фокуса по п.1, в котором задается, что длина волны света равна λ, числовая апертура объектива равна NA, средняя длина последовательности импульсов среды для записи, нормированная на λ/NA, равна RL, шаг дорожки, нормированный на λ/NA, равен ТР, и полоса захвата указанного устройства регулирования фокуса равна CR [мкм], применяется следующее уравнение:
0,114/(RL-0,72)+0,84≤CR≤18000(TP-0,69)5+3,13.
3. Устройство регулирования фокуса по п.2, в котором применяется следующее уравнение для средней длины последовательности импульсов RL:
RL=2 х {целая часть от [(средняя длина инверсии данных/длина двоичного разряда канала)+0,5]} x длина двоичного разряда канала x NA/λ.
4. Устройство регулирования фокуса по п.3, в котором длина волны λ света имеет значение в пределах диапазона 0,395 мкм до 0,415 мкм, и числовая апертура NA объектива имеет значение в диапазоне от 0,80 до 0,90.
5. Устройство регулирования фокуса по п.4, в котором, при условии, что нормированный шаг дорожки ТР равен 0,6 или более, и средняя длина последовательности импульсов RL равна 0,86 или более, применяется следующее уравнение:
1,65[мкм]≤CR[мкм]≤3,02[мкм].
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002185251A JP2004030776A (ja) | 2002-06-25 | 2002-06-25 | フォーカスサーボ装置 |
| JP2002-185251 | 2002-06-25 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| RU2005101636A true RU2005101636A (ru) | 2005-06-10 |
| RU2321081C2 RU2321081C2 (ru) | 2008-03-27 |
Family
ID=29996729
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| RU2005101636/28A RU2321081C2 (ru) | 2002-06-25 | 2003-06-23 | Устройство регулирования фокуса |
Country Status (11)
| Country | Link |
|---|---|
| US (1) | US7190642B2 (ru) |
| EP (1) | EP1533798A4 (ru) |
| JP (1) | JP2004030776A (ru) |
| KR (1) | KR100953406B1 (ru) |
| CN (1) | CN1282952C (ru) |
| AU (1) | AU2003243952A1 (ru) |
| BR (1) | BR0312051A (ru) |
| MX (1) | MXPA05000025A (ru) |
| RU (1) | RU2321081C2 (ru) |
| TW (1) | TWI245567B (ru) |
| WO (1) | WO2004001729A1 (ru) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101354893B (zh) * | 2007-07-24 | 2010-07-07 | 建兴电子科技股份有限公司 | 光驱的最佳球面像差补偿位准的校准方法 |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2552660B2 (ja) * | 1986-11-21 | 1996-11-13 | 三菱電機株式会社 | フオ−カス誤差検出装置 |
| JPH05120698A (ja) | 1991-10-25 | 1993-05-18 | Matsushita Electric Ind Co Ltd | フオーカスサーボ引き込み装置 |
| JP3558306B2 (ja) * | 1994-07-26 | 2004-08-25 | パイオニア株式会社 | 多層記録ディスク及びこれを用いた記録／再生システム |
| JPH08147715A (ja) * | 1994-11-22 | 1996-06-07 | Sony Corp | ディスク記録又は再生装置及びフォーカスサーボ回路 |
| JPH08315370A (ja) | 1995-05-16 | 1996-11-29 | Ricoh Co Ltd | 情報記録再生装置及び記録媒体 |
| JP3476112B2 (ja) * | 1995-10-18 | 2003-12-10 | ソニー株式会社 | フォーカスサーボ装置 |
| US6567353B1 (en) * | 1999-01-21 | 2003-05-20 | Pentax Corporation | Optical head with light receiving element surfaces divided into at least three light receiving areas |
| JP3635524B2 (ja) * | 1999-02-12 | 2005-04-06 | パイオニア株式会社 | 光導波路素子及び光ピックアップ |
| US7016269B2 (en) * | 2000-12-21 | 2006-03-21 | Pioneer Corporation | Optical pickup apparatus and focusing control method |
| JP2002230801A (ja) * | 2001-02-02 | 2002-08-16 | Pioneer Electronic Corp | 光ピックアップ装置 |
-
2002
- 2002-06-25 JP JP2002185251A patent/JP2004030776A/ja active Pending
-
2003
- 2003-06-23 RU RU2005101636/28A patent/RU2321081C2/ru not_active IP Right Cessation
- 2003-06-23 AU AU2003243952A patent/AU2003243952A1/en not_active Abandoned
- 2003-06-23 BR BR0312051-1A patent/BR0312051A/pt not_active IP Right Cessation
- 2003-06-23 WO PCT/JP2003/007937 patent/WO2004001729A1/ja active Application Filing
- 2003-06-23 EP EP03733551A patent/EP1533798A4/en not_active Withdrawn
- 2003-06-23 CN CNB038149885A patent/CN1282952C/zh not_active Expired - Fee Related
- 2003-06-23 KR KR1020047021169A patent/KR100953406B1/ko not_active IP Right Cessation
- 2003-06-24 US US11/145,754 patent/US7190642B2/en not_active Expired - Fee Related
- 2003-06-25 TW TW092117241A patent/TWI245567B/zh not_active IP Right Cessation
-
2004
- 2004-12-17 MX MXPA05000025A patent/MXPA05000025A/es unknown
Also Published As
| Publication number | Publication date |
|---|---|
| EP1533798A4 (en) | 2008-05-21 |
| TW200406121A (en) | 2004-04-16 |
| KR100953406B1 (ko) | 2010-04-19 |
| JP2004030776A (ja) | 2004-01-29 |
| EP1533798A1 (en) | 2005-05-25 |
| WO2004001729A1 (ja) | 2003-12-31 |
| CN1282952C (zh) | 2006-11-01 |
| TWI245567B (en) | 2005-12-11 |
| US20050276175A1 (en) | 2005-12-15 |
| US7190642B2 (en) | 2007-03-13 |
| MXPA05000025A (es) | 2005-08-26 |
| BR0312051A (pt) | 2005-03-29 |
| AU2003243952A1 (en) | 2004-01-06 |
| KR20050022020A (ko) | 2005-03-07 |
| CN1662970A (zh) | 2005-08-31 |
| RU2321081C2 (ru) | 2008-03-27 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MM4A | The patent is invalid due to non-payment of fees |
Effective date: 20100624 |