CH627016A5 - Apparatus for reading out a radiation-reflecting recording carrier - Google Patents
Apparatus for reading out a radiation-reflecting recording carrier Download PDFInfo
- Publication number
- CH627016A5 CH627016A5 CH302678A CH302678A CH627016A5 CH 627016 A5 CH627016 A5 CH 627016A5 CH 302678 A CH302678 A CH 302678A CH 302678 A CH302678 A CH 302678A CH 627016 A5 CH627016 A5 CH 627016A5
- Authority
- CH
- Switzerland
- Prior art keywords
- radiation
- track
- focus
- astigmatic
- lens system
- Prior art date
Links
- 230000005855 radiation Effects 0.000 description 26
- 238000001514 detection method Methods 0.000 description 6
- 239000002131 composite material Substances 0.000 description 4
- 230000001419 dependent effect Effects 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000005693 optoelectronics Effects 0.000 description 2
- 238000011896 sensitive detection Methods 0.000 description 2
- 201000009310 astigmatism Diseases 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 210000001747 pupil Anatomy 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
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
- G11B7/09—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
- Optical Recording Or Reproduction (AREA)
- Optical Head (AREA)
- Automatic Focus Adjustment (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL7703076A NL7703076A (nl) | 1977-03-22 | 1977-03-22 | Inrichting voor het uitlezen van een stralings- reflekterende registratiedrager. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CH627016A5 true CH627016A5 (en) | 1981-12-15 |
Family
ID=19828205
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CH302678A CH627016A5 (en) | 1977-03-22 | 1978-03-20 | Apparatus for reading out a radiation-reflecting recording carrier |
Country Status (20)
| Country | Link |
|---|---|
| JP (1) | JPS53117403A (es) |
| AR (1) | AR214353A1 (es) |
| AT (1) | AT369580B (es) |
| AU (1) | AU510218B2 (es) |
| BE (1) | BE865083A (es) |
| BR (1) | BR7801690A (es) |
| CA (1) | CA1109560A (es) |
| CH (1) | CH627016A5 (es) |
| DE (1) | DE2810616A1 (es) |
| DK (1) | DK145868C (es) |
| ES (1) | ES468055A1 (es) |
| FR (1) | FR2385171A1 (es) |
| IT (1) | IT1093316B (es) |
| MX (1) | MX143603A (es) |
| NL (1) | NL7703076A (es) |
| NZ (1) | NZ186732A (es) |
| PL (1) | PL113996B1 (es) |
| SE (1) | SE424676B (es) |
| YU (1) | YU39193B (es) |
| ZA (1) | ZA78216B (es) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4290132A (en) * | 1977-05-11 | 1981-09-15 | Pioneer Electronic Corporation | Focus servo device for use in an optical information read-out device |
| FR2460022B1 (fr) * | 1979-06-25 | 1987-09-11 | Hitachi Ltd | Systeme optique de reproduction d'informations |
| NL7907216A (nl) * | 1979-09-28 | 1981-03-31 | Philips Nv | Optisch fokusfout-detektiestelsel. |
| JPS59125727U (ja) * | 1983-02-15 | 1984-08-24 | パイオニア株式会社 | 光学式情報ピツクアツプ装置 |
| NL8400674A (nl) * | 1984-03-02 | 1985-10-01 | Philips Nv | Inrichting voor het inschrijven en/of uitlezen van informatie in een spoor van een reflekterende registratiedrager, met een fokusregeling met verminderde spot offsetgevoeligheid. |
| JPS6139942A (ja) * | 1984-08-01 | 1986-02-26 | Matsushita Electric Ind Co Ltd | 光ピツクアツプ |
| US4609813A (en) * | 1985-03-18 | 1986-09-02 | International Business Machines Corporation | Optical systems employing ovate light beams |
| JPS6310326A (ja) * | 1986-07-01 | 1988-01-16 | Sanyo Electric Co Ltd | 光ピツクアツプ装置 |
| DE3828146A1 (de) * | 1988-08-19 | 1990-02-22 | Philips Patentverwaltung | Elektrodynamischer aktuator fuer eine optische einschreib- und ausleseeinheit |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2271590B1 (es) * | 1974-01-15 | 1978-12-01 | Thomson Brandt | |
| NL182990C (nl) * | 1975-07-07 | 1988-06-16 | Philips Nv | Inrichting voor het uitlezen van een stralingsreflekterende registratiedrager. |
| FR2325987A1 (fr) * | 1975-09-29 | 1977-04-22 | Thomson Brandt | Dispositif de lecture optique d'un enregistrement |
| GB1532345A (en) * | 1976-06-25 | 1978-11-15 | Hitachi Ltd | Information play-back apparatus |
| JPS5337722A (en) * | 1976-09-20 | 1978-04-07 | Ebata Shiyouji Kk | Method of producing concrete piles |
| NL7703077A (nl) * | 1977-03-22 | 1978-09-26 | Philips Nv | Inrichting voor het uitlezen van een stralings- reflekterende registratiedrager. |
-
1977
- 1977-03-22 NL NL7703076A patent/NL7703076A/xx not_active Application Discontinuation
-
1978
- 1978-01-12 ZA ZA00780216A patent/ZA78216B/xx unknown
- 1978-02-06 AR AR270983A patent/AR214353A1/es active
- 1978-03-11 DE DE19782810616 patent/DE2810616A1/de active Pending
- 1978-03-15 CA CA298,999A patent/CA1109560A/en not_active Expired
- 1978-03-17 DK DK120578A patent/DK145868C/da not_active IP Right Cessation
- 1978-03-17 MX MX172816A patent/MX143603A/es unknown
- 1978-03-17 IT IT21340/78A patent/IT1093316B/it active
- 1978-03-20 SE SE7803138A patent/SE424676B/sv not_active IP Right Cessation
- 1978-03-20 BR BR7801690A patent/BR7801690A/pt unknown
- 1978-03-20 AT AT0196578A patent/AT369580B/de not_active IP Right Cessation
- 1978-03-20 ES ES468055A patent/ES468055A1/es not_active Expired
- 1978-03-20 PL PL1978205453A patent/PL113996B1/pl unknown
- 1978-03-20 AU AU34294/78A patent/AU510218B2/en not_active Expired
- 1978-03-20 CH CH302678A patent/CH627016A5/de not_active IP Right Cessation
- 1978-03-20 NZ NZ186732A patent/NZ186732A/xx unknown
- 1978-03-20 BE BE186087A patent/BE865083A/xx not_active IP Right Cessation
- 1978-03-21 YU YU00673/78A patent/YU39193B/xx unknown
- 1978-03-22 JP JP3182778A patent/JPS53117403A/ja active Pending
- 1978-03-22 FR FR7808294A patent/FR2385171A1/fr active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| SE424676B (sv) | 1982-08-02 |
| AU510218B2 (en) | 1980-06-12 |
| AR214353A1 (es) | 1979-05-31 |
| CA1109560A (en) | 1981-09-22 |
| DK145868B (da) | 1983-03-21 |
| BE865083A (fr) | 1978-09-20 |
| AT369580B (de) | 1983-01-10 |
| YU39193B (en) | 1984-08-31 |
| ES468055A1 (es) | 1978-11-16 |
| ATA196578A (de) | 1982-05-15 |
| PL113996B1 (en) | 1981-01-31 |
| ZA78216B (en) | 1979-08-29 |
| YU67378A (en) | 1982-06-30 |
| FR2385171A1 (fr) | 1978-10-20 |
| DE2810616A1 (de) | 1978-09-28 |
| MX143603A (es) | 1981-06-05 |
| AU3429478A (en) | 1979-09-27 |
| DK145868C (da) | 1983-09-12 |
| NL7703076A (nl) | 1978-09-26 |
| IT1093316B (it) | 1985-07-19 |
| PL205453A1 (pl) | 1978-12-18 |
| NZ186732A (en) | 1981-02-11 |
| BR7801690A (pt) | 1979-01-02 |
| DK120578A (da) | 1978-09-23 |
| IT7821340A0 (it) | 1978-03-17 |
| JPS53117403A (en) | 1978-10-13 |
| SE7803138L (sv) | 1978-09-23 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PFA | Name/firm changed |
Owner name: PHILIPS ELECTRONICS N.V. |
|
| PL | Patent ceased |