DE69220015D1 - Optische Platten Lesegerät - Google Patents
Optische Platten LesegerätInfo
- Publication number
- DE69220015D1 DE69220015D1 DE69220015T DE69220015T DE69220015D1 DE 69220015 D1 DE69220015 D1 DE 69220015D1 DE 69220015 T DE69220015 T DE 69220015T DE 69220015 T DE69220015 T DE 69220015T DE 69220015 D1 DE69220015 D1 DE 69220015D1
- Authority
- DE
- Germany
- Prior art keywords
- optical disk
- disk reader
- reader
- optical
- disk
- 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.)
- Expired - Fee Related
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
- G11B7/1381—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
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
- G11B20/10009—Improvement or modification of read or write signals
-
- 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
- G11B7/12—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
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Optical Recording Or Reproduction (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3346029A JP2806113B2 (ja) | 1991-12-27 | 1991-12-27 | 光ディスク装置 |
JP13469992A JPH05325194A (ja) | 1992-05-27 | 1992-05-27 | 光ディスク装置 |
Publications (2)
Publication Number | Publication Date |
---|---|
DE69220015D1 true DE69220015D1 (de) | 1997-07-03 |
DE69220015T2 DE69220015T2 (de) | 1997-09-25 |
Family
ID=26468731
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE69220015T Expired - Fee Related DE69220015T2 (de) | 1991-12-27 | 1992-12-23 | Optische Platten Lesegerät |
Country Status (3)
Country | Link |
---|---|
US (1) | US5313450A (de) |
EP (1) | EP0548937B1 (de) |
DE (1) | DE69220015T2 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103134444A (zh) * | 2013-02-01 | 2013-06-05 | 同济大学 | 双视场可变焦三维测量系统 |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2638520B2 (ja) * | 1994-11-22 | 1997-08-06 | 日本電気株式会社 | 光情報記録媒体再生装置 |
Family Cites Families (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2831676A1 (de) * | 1978-07-19 | 1980-02-07 | Basf Ag | Neue bis-epoxy-dialkoxy-alkane, deren herstellung und verwendung |
JPS5864650A (ja) * | 1981-10-14 | 1983-04-18 | Mansei Kogyo Kk | 光学的情報再生装置 |
DE3201318A1 (de) * | 1982-01-18 | 1983-07-28 | Tandberg Data A/S, Oslo | Verfahren und schaltungsanordnung zum bewerten von lesesignalen eines magnetschichtspeichers |
JPS5984319A (ja) * | 1982-11-04 | 1984-05-16 | Sony Corp | デイジタル信号復元方式 |
JPS60107736A (ja) * | 1983-11-16 | 1985-06-13 | Ricoh Co Ltd | 光ディスクメモリにおける信号読出方法 |
JPS61120380A (ja) * | 1984-11-16 | 1986-06-07 | Sony Corp | デジタル信号処理回路 |
CA1275730C (en) * | 1985-03-05 | 1990-10-30 | Nec Corporation | Reading circuit in an optical disk apparatus |
JP2641421B2 (ja) * | 1985-03-22 | 1997-08-13 | 株式会社日立製作所 | 光学的検出方法、光学的情報再生装置、及び信号検出回路 |
JPS61284876A (ja) * | 1985-06-11 | 1986-12-15 | Nec Corp | 光デイスク装置 |
JPH0731877B2 (ja) * | 1985-07-03 | 1995-04-10 | 株式会社日立製作所 | 情報記録再生方法及び装置 |
JP2810035B2 (ja) * | 1986-08-22 | 1998-10-15 | 株式会社日立製作所 | 光学的記録再生方法 |
US4866757A (en) * | 1986-10-22 | 1989-09-12 | Nilssen Ole K | Combined telephone and power distribution system |
CA1322594C (en) * | 1987-09-21 | 1993-09-28 | Hiroshi Fuji | Digital signal reproduction apparatus |
US4839876A (en) * | 1987-11-23 | 1989-06-13 | International Business Machines Corporation | Track seeking using a track following loop |
JPS63247920A (ja) * | 1988-01-14 | 1988-10-14 | Olympus Optical Co Ltd | 光学的情報読取り装置 |
JP2845915B2 (ja) * | 1989-01-06 | 1999-01-13 | 株式会社日立製作所 | 情報再生方法および情報再生装置 |
JP2825876B2 (ja) * | 1989-10-11 | 1998-11-18 | 日立マクセル株式会社 | 光記録媒体の情報記録再生装置 |
-
1992
- 1992-12-23 DE DE69220015T patent/DE69220015T2/de not_active Expired - Fee Related
- 1992-12-23 EP EP92121866A patent/EP0548937B1/de not_active Expired - Lifetime
- 1992-12-28 US US07/997,569 patent/US5313450A/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103134444A (zh) * | 2013-02-01 | 2013-06-05 | 同济大学 | 双视场可变焦三维测量系统 |
Also Published As
Publication number | Publication date |
---|---|
EP0548937A1 (de) | 1993-06-30 |
EP0548937B1 (de) | 1997-05-28 |
DE69220015T2 (de) | 1997-09-25 |
US5313450A (en) | 1994-05-17 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8364 | No opposition during term of opposition | ||
8339 | Ceased/non-payment of the annual fee |