NL1007179A1 - Optisch opneemstelsel met compacte afmetingen. - Google Patents
Optisch opneemstelsel met compacte afmetingen.Info
- Publication number
- NL1007179A1 NL1007179A1 NL1007179A NL1007179A NL1007179A1 NL 1007179 A1 NL1007179 A1 NL 1007179A1 NL 1007179 A NL1007179 A NL 1007179A NL 1007179 A NL1007179 A NL 1007179A NL 1007179 A1 NL1007179 A1 NL 1007179A1
- Authority
- NL
- Netherlands
- Prior art keywords
- optical recording
- recording system
- compact dimensions
- compact
- dimensions
- 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
- G11B7/12—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
- G11B7/1359—Single prisms
-
- 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
- G11B7/1365—Separate or integrated refractive elements, e.g. wave plates
-
- 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)
Applications Claiming Priority (8)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR19960043087 | 1996-09-30 | ||
| KR19960043094 | 1996-09-30 | ||
| KR1019960043093A KR19980023595A (ko) | 1996-09-30 | 1996-09-30 | 광 픽업 장치 |
| KR1019960043094A KR19980023596A (ko) | 1996-09-30 | 1996-09-30 | 광 픽업 장치 |
| KR19960043086 | 1996-09-30 | ||
| KR19960043093 | 1996-09-30 | ||
| KR1019960043086A KR19980023588A (ko) | 1996-09-30 | 1996-09-30 | 광 픽-업장치 |
| KR1019960043087A KR19980023589A (ko) | 1996-09-30 | 1996-09-30 | 광 픽-업장치 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| NL1007179A1 true NL1007179A1 (nl) | 1998-03-31 |
| NL1007179C2 NL1007179C2 (nl) | 1998-07-08 |
Family
ID=27483159
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL1007179A NL1007179C2 (nl) | 1996-09-30 | 1997-09-30 | Optisch opneemstelsel. |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US5905254A (nl) |
| JP (1) | JPH10112054A (nl) |
| CN (1) | CN1181537A (nl) |
| FR (1) | FR2754096B1 (nl) |
| NL (1) | NL1007179C2 (nl) |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL7907216A (nl) * | 1979-09-28 | 1981-03-31 | Philips Nv | Optisch fokusfout-detektiestelsel. |
| EP0225564A3 (en) * | 1985-11-30 | 1988-07-06 | Kabushiki Kaisha Toshiba | Optical head |
| KR900008380B1 (ko) * | 1986-07-01 | 1990-11-17 | 미쓰비시덴기 가부시기 가이샤 | 광학식 헤드장치 |
| JPH0664750B2 (ja) * | 1987-04-27 | 1994-08-22 | パイオニア株式会社 | 光学ヘツド |
| JPH04318333A (ja) * | 1991-04-17 | 1992-11-09 | Matsushita Electric Ind Co Ltd | 光ヘッド装置 |
| US5568315A (en) * | 1991-05-28 | 1996-10-22 | Discovision Associates | Optical beamsplitter |
| US5331622A (en) * | 1991-05-28 | 1994-07-19 | Applied Magnetics Corporation | Compact optical head |
| GB2256725B (en) * | 1991-06-10 | 1995-01-18 | Alps Electric Co Ltd | Polarising light separation element and light receiving optical device using same |
| KR950015241A (ko) * | 1993-11-16 | 1995-06-16 | 배순훈 | 광픽업의 포커스에러 검출방법 및 그 장치 |
| EP0749119A3 (en) * | 1995-05-31 | 1997-08-20 | Daewoo Electronics Co Ltd | Optical reading device |
-
1997
- 1997-09-30 FR FR9712152A patent/FR2754096B1/fr not_active Expired - Fee Related
- 1997-09-30 NL NL1007179A patent/NL1007179C2/nl not_active IP Right Cessation
- 1997-09-30 CN CN97122590A patent/CN1181537A/zh active Pending
- 1997-09-30 JP JP9265663A patent/JPH10112054A/ja active Pending
- 1997-09-30 US US08/940,890 patent/US5905254A/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| FR2754096B1 (fr) | 1999-12-10 |
| US5905254A (en) | 1999-05-18 |
| JPH10112054A (ja) | 1998-04-28 |
| NL1007179C2 (nl) | 1998-07-08 |
| CN1181537A (zh) | 1998-05-13 |
| FR2754096A1 (fr) | 1998-04-03 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| AD1B | A search report has been drawn up | ||
| PD2B | A search report has been drawn up | ||
| VD1 | Lapsed due to non-payment of the annual fee |
Effective date: 20040401 |