GB9620677D0 - Optical pickup device - Google Patents
Optical pickup deviceInfo
- Publication number
- GB9620677D0 GB9620677D0 GBGB9620677.6A GB9620677A GB9620677D0 GB 9620677 D0 GB9620677 D0 GB 9620677D0 GB 9620677 A GB9620677 A GB 9620677A GB 9620677 D0 GB9620677 D0 GB 9620677D0
- Authority
- GB
- United Kingdom
- Prior art keywords
- pickup device
- optical pickup
- optical
- pickup
- 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
- G11B7/1381—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
- G11B7/28—Re-recording, i.e. transcribing information from one optical record carrier on to one or more similar or dissimilar record carriers
-
- 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
- G11B7/002—Recording, reproducing or erasing systems characterised by the shape or form of the carrier
- G11B7/0037—Recording, reproducing or erasing systems characterised by the shape or form of the carrier with discs
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Head (AREA)
- Optical Recording Or Reproduction (AREA)
- Glass Compositions (AREA)
- Holo Graphy (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019950033913A KR100200858B1 (en) | 1995-10-04 | 1995-10-04 | Optical pickup device |
Publications (3)
Publication Number | Publication Date |
---|---|
GB9620677D0 true GB9620677D0 (en) | 1996-11-20 |
GB2306045A GB2306045A (en) | 1997-04-23 |
GB2306045B GB2306045B (en) | 1999-08-04 |
Family
ID=19429197
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB9620677A Expired - Lifetime GB2306045B (en) | 1995-10-04 | 1996-10-04 | Optical pickup device |
Country Status (7)
Country | Link |
---|---|
JP (1) | JP3872145B2 (en) |
KR (1) | KR100200858B1 (en) |
DE (1) | DE19640837B4 (en) |
FR (1) | FR2739717B1 (en) |
GB (1) | GB2306045B (en) |
IT (1) | IT1285223B1 (en) |
NL (1) | NL1004079C2 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH09219036A (en) * | 1996-02-15 | 1997-08-19 | Nec Corp | Optical head device |
WO2000039791A1 (en) * | 1998-12-29 | 2000-07-06 | Koninklijke Philips Electronics N.V. | Optical scanning device for two types of record carriers |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60185230A (en) * | 1984-03-02 | 1985-09-20 | Pioneer Electronic Corp | Focal error detector |
US5281797A (en) * | 1991-12-26 | 1994-01-25 | Hitachi, Ltd. | Short wavelength optical disk head having a changeable aperture |
US5349592A (en) * | 1992-02-27 | 1994-09-20 | Kabushiki Kaisha Toshiba | Super-resolution optical element for use in image forming apparatus |
JP2532818B2 (en) * | 1993-02-01 | 1996-09-11 | 松下電器産業株式会社 | Objective lens and optical head device |
JPH06295467A (en) * | 1993-04-01 | 1994-10-21 | Nippon Columbia Co Ltd | Optical pickup device |
JP3548259B2 (en) * | 1994-04-07 | 2004-07-28 | ペンタックス株式会社 | Magneto-optical head device |
KR100392857B1 (en) * | 1995-03-15 | 2003-12-31 | 코닌클리케 필립스 일렉트로닉스 엔.브이. | Apparatus for Optically Scanning Recording Media |
HU224675B1 (en) * | 1995-08-30 | 2005-12-28 | Samsung Electronics Co. Ltd. | Optical device for scanning memory disk |
-
1995
- 1995-10-04 KR KR1019950033913A patent/KR100200858B1/en not_active IP Right Cessation
-
1996
- 1996-09-20 NL NL1004079A patent/NL1004079C2/en not_active IP Right Cessation
- 1996-09-27 IT IT96MI001992A patent/IT1285223B1/en active IP Right Grant
- 1996-10-02 FR FR9611994A patent/FR2739717B1/en not_active Expired - Lifetime
- 1996-10-02 DE DE19640837A patent/DE19640837B4/en not_active Expired - Lifetime
- 1996-10-04 JP JP26433996A patent/JP3872145B2/en not_active Expired - Lifetime
- 1996-10-04 GB GB9620677A patent/GB2306045B/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
KR100200858B1 (en) | 1999-06-15 |
DE19640837A1 (en) | 1997-04-10 |
JP3872145B2 (en) | 2007-01-24 |
DE19640837B4 (en) | 2011-01-27 |
JPH09120572A (en) | 1997-05-06 |
ITMI961992A1 (en) | 1998-03-27 |
GB2306045A (en) | 1997-04-23 |
NL1004079C2 (en) | 1998-01-07 |
NL1004079A1 (en) | 1997-04-08 |
FR2739717B1 (en) | 1999-01-08 |
FR2739717A1 (en) | 1997-04-11 |
KR970023055A (en) | 1997-05-30 |
GB2306045B (en) | 1999-08-04 |
IT1285223B1 (en) | 1998-06-03 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PE20 | Patent expired after termination of 20 years |
Expiry date: 20161003 |