JPH11506252A - 記録担体用光学走査装置 - Google Patents
記録担体用光学走査装置Info
- Publication number
- JPH11506252A JPH11506252A JP9531606A JP53160697A JPH11506252A JP H11506252 A JPH11506252 A JP H11506252A JP 9531606 A JP9531606 A JP 9531606A JP 53160697 A JP53160697 A JP 53160697A JP H11506252 A JPH11506252 A JP H11506252A
- Authority
- JP
- Japan
- Prior art keywords
- record carrier
- radiation beam
- radiation
- scanning
- layer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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
- G11B7/1392—Means for controlling the beam wavefront, e.g. for correction of aberration
-
- 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
- G11B7/0908—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 for focusing only
- G11B7/0909—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 for focusing only by astigmatic methods
-
- 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
- G11B7/1374—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
- G11B7/12—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
- G11B7/1376—Collimator 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
- G11B7/12—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
- G11B7/1381—Non-lens elements for altering the properties of the beam, e.g. knife edges, slits, filters or stops
-
- 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
- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
- G11B7/24018—Laminated discs
- G11B7/24027—Layers; Shape, structure or physical properties thereof
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B2007/0003—Recording, reproducing or erasing systems characterised by the structure or type of the carrier
- G11B2007/0006—Recording, reproducing or erasing systems characterised by the structure or type of the carrier adapted for scanning different types of carrier, e.g. CD & DVD
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B2007/0003—Recording, reproducing or erasing systems characterised by the structure or type of the carrier
- G11B2007/0009—Recording, reproducing or erasing systems characterised by the structure or type of the carrier for carriers having data stored in three dimensions, e.g. volume storage
- G11B2007/0013—Recording, reproducing or erasing systems characterised by the structure or type of the carrier for carriers having data stored in three dimensions, e.g. volume storage for carriers having multiple discrete layers
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Head (AREA)
- Optical Recording Or Reproduction (AREA)
- Facsimile Scanning Arrangements (AREA)
- Vehicle Body Suspensions (AREA)
- Facsimile Heads (AREA)
Abstract
Description
Claims (1)
- 【特許請求の範囲】 1.第1の情報層及び第1の厚さの第1の透明層を有する第1のタイプの記録担 体と、第2の情報層及び第1の厚さと異なる第2の厚さの第2の透明層を有する 第2の記録担体の2つのタイプの記録担体を走査する光学走査装置において、当 該装置は放射ビームを発生する放射源と、放射ビームを第1の透明層を経て第1 の情報層上で焦点に収束させるように設計されたレンズ系と、記録担体から反射 された放射ビーム内に配置された検出システムと、放射源と検出システムとの間 の光路内に配置された不透明リングと、放射ビームの最良焦点を第1の情報層上 にほぼ位置させるとともに前記放射ビームの近軸焦点を第2の情報層上にほぼ位 置させる位置調整手段とを具えることを特徴とする光学走査装置。 2.前記リングの内側円の半径は0.75r1〜1.25r1の範囲内にあり、こ こでr1は、 で与えられ、λは放射ビームの波長、nは第2透明層の屈折率、Δdは第1の厚 さと第2の厚さとの差、r0はリングの位置における放射ビームの半径、及びN A0はレンズ系により収束される放射ビームの開口数であることを特徴とする請 求項1記載の光学走査装置。 3.前記リングは放射源から記録担体への放射ビーム内及び記録担体からの放射 ビーム内に配置され、該リングは0.05r0〜0.25r0の範囲内の幅を有す ることを特徴とする請求項2記載の光学走査装置。 4.前記リングは記録担体からの放射ビーム内にのみ配置され、該リングは0. 15r0〜0.25r0の範囲内の幅を有することを特徴とする請求項2記載の光 学走査装置。 5.第1の情報層及び第1の厚さの第1の透明層を有する第1のタイプの記録担 体と、第2の情報層及び第1の厚さと異なる第2の厚さの第2の透明層を有す る第2の記録担体の2つのタイプの記録担体を光学的に走査する方法において、 第1のタイプの記録担体を走査するとき、放射ビームをレンズ系により第1の透 明層を経てほぼ第1の情報層上で最良焦点に収束させるステップと、第2のタイ プの記録担体を走査するとき、放射ビームを前記レンズ系により第2の透明層を 経てほぼ第2の情報層上で近軸焦点に収束させるステップと、記録担体から反射 された放射を検出システムに収束させるステップと、放射源と検出システムとの 間の光路内に配置された不透明リングにより反射ビームの一部分が検出システム に到達するのを阻止するステップとを具えることを特徴とする走査方法。 6.第1のタイプの記録担体の走査時に記録担体から反射された放射ビームの断 面の少なくとも外側環状部分内の放射から最良焦点誤差信号を形成するステップ と、第2のタイプの記録担体の走査時に主として外側環状部分内の中心部分内の 放射から近軸焦点誤差を形成するステップと、レンズ系の位置を第1のタイプの 記録担体の走査時には最良焦点誤差信号に応答して、第2のタイプの記録担体の 走査時には近軸焦点誤差信号に応答して制御するステップとを具えることを特徴 とする請求項5記載の方法。 7.第1のタイプの記録担体の走査時に記録担体から反射された放射ビームのほ ぼ全断面内の放射から情報信号を発生させるステップと、第2のタイプの記録担 体の走査時に前記断面の中心部分内の放射から情報信号を発生させるステップと を具えることを特徴とする請求項5記載の方法。
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/IB1996/000182 WO1996028816A2 (en) | 1995-03-15 | 1996-03-08 | Device for optically scanning a recording medium |
NL96201832.1 | 1996-07-05 | ||
NL96/00182 | 1996-07-05 | ||
EP96201832 | 1996-07-05 | ||
PCT/IB1997/000175 WO1997033278A1 (en) | 1996-03-08 | 1997-02-25 | Device for optically scanning a record carrier |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH11506252A true JPH11506252A (ja) | 1999-06-02 |
JP3804984B2 JP3804984B2 (ja) | 2006-08-02 |
Family
ID=8224134
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP53160697A Expired - Fee Related JP3804984B2 (ja) | 1996-03-08 | 1997-02-25 | 記録担体用光学走査装置 |
Country Status (10)
Country | Link |
---|---|
EP (1) | EP0824754B1 (ja) |
JP (1) | JP3804984B2 (ja) |
KR (1) | KR100536102B1 (ja) |
CN (1) | CN1111852C (ja) |
AT (1) | ATE283533T1 (ja) |
BR (1) | BR9702117A (ja) |
DE (1) | DE69731693T2 (ja) |
ES (1) | ES2231855T3 (ja) |
TW (1) | TW323360B (ja) |
WO (1) | WO1997033278A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2019518236A (ja) * | 2016-05-12 | 2019-06-27 | インソライト ソシエテ アノニム | 少なくとも1つの収集素子に対して一様でない入射方向を有する入射光を捕捉及び伝送するための光学機械システム並びに対応する方法 |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6088322A (en) * | 1998-05-07 | 2000-07-11 | Broome; Barry G. | Single objective lens for use with CD or DVD optical disks |
CN110426124A (zh) * | 2019-08-12 | 2019-11-08 | 长春理工大学 | 用于芯片式光谱仪能够实现信号光耦合与对准监测的装置 |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3794414A (en) * | 1972-05-12 | 1974-02-26 | Jessen Inc Wesley | Multiple focal contact lens |
JPS6273429A (ja) * | 1985-09-26 | 1987-04-04 | Toshiba Corp | 光学式ピツクアツプの位置検出装置 |
JP2532818B2 (ja) * | 1993-02-01 | 1996-09-11 | 松下電器産業株式会社 | 対物レンズおよび光ヘッド装置 |
KR100392857B1 (ko) * | 1995-03-15 | 2003-12-31 | 코닌클리케 필립스 일렉트로닉스 엔.브이. | 기록 매체를 광학적으로 주사하기 위한 장치 |
HU224675B1 (hu) * | 1995-08-30 | 2005-12-28 | Samsung Electronics Co. Ltd. | Memória diszk letapogató optikai eszköz |
KR100292478B1 (ko) * | 1995-11-15 | 2001-06-01 | 구자홍 | 대물렌즈 |
-
1997
- 1997-02-25 AT AT97904531T patent/ATE283533T1/de not_active IP Right Cessation
- 1997-02-25 DE DE69731693T patent/DE69731693T2/de not_active Expired - Fee Related
- 1997-02-25 JP JP53160697A patent/JP3804984B2/ja not_active Expired - Fee Related
- 1997-02-25 CN CN97190168A patent/CN1111852C/zh not_active Expired - Fee Related
- 1997-02-25 EP EP97904531A patent/EP0824754B1/en not_active Expired - Lifetime
- 1997-02-25 WO PCT/IB1997/000175 patent/WO1997033278A1/en active IP Right Grant
- 1997-02-25 ES ES97904531T patent/ES2231855T3/es not_active Expired - Lifetime
- 1997-02-25 KR KR1019970707904A patent/KR100536102B1/ko not_active IP Right Cessation
- 1997-02-25 BR BR9702117A patent/BR9702117A/pt not_active IP Right Cessation
- 1997-03-28 TW TW086103984A patent/TW323360B/zh active
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2019518236A (ja) * | 2016-05-12 | 2019-06-27 | インソライト ソシエテ アノニム | 少なくとも1つの収集素子に対して一様でない入射方向を有する入射光を捕捉及び伝送するための光学機械システム並びに対応する方法 |
Also Published As
Publication number | Publication date |
---|---|
BR9702117A (pt) | 1999-01-26 |
KR100536102B1 (ko) | 2006-03-20 |
EP0824754A1 (en) | 1998-02-25 |
WO1997033278A1 (en) | 1997-09-12 |
ES2231855T3 (es) | 2005-05-16 |
EP0824754B1 (en) | 2004-11-24 |
TW323360B (ja) | 1997-12-21 |
DE69731693T2 (de) | 2005-11-10 |
KR19990008377A (ko) | 1999-01-25 |
CN1181834A (zh) | 1998-05-13 |
DE69731693D1 (de) | 2004-12-30 |
ATE283533T1 (de) | 2004-12-15 |
JP3804984B2 (ja) | 2006-08-02 |
CN1111852C (zh) | 2003-06-18 |
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