FR2460022B1 - Systeme optique de reproduction d'informations - Google Patents
Systeme optique de reproduction d'informationsInfo
- Publication number
- FR2460022B1 FR2460022B1 FR8013058A FR8013058A FR2460022B1 FR 2460022 B1 FR2460022 B1 FR 2460022B1 FR 8013058 A FR8013058 A FR 8013058A FR 8013058 A FR8013058 A FR 8013058A FR 2460022 B1 FR2460022 B1 FR 2460022B1
- Authority
- FR
- France
- Prior art keywords
- optical information
- information reproducing
- reproducing system
- optical
- reproducing
- 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
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
- G11B7/1356—Double or multiple prisms, i.e. having two or more prisms in cooperation
-
- 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
- G11B7/1378—Separate aberration correction lenses; Cylindrical lenses to generate astigmatism; Beam expanders
-
- 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
- G11B2007/13727—Compound lenses, i.e. two or more lenses co-operating to perform a function, e.g. compound objective lens including a solid immersion lens, positive and negative lenses either bonded together or with adjustable spacing
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Head (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1979085976U JPS566038U (fr) | 1979-06-25 | 1979-06-25 | |
| JP4559280A JPS56142507A (en) | 1980-04-09 | 1980-04-09 | Optical system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2460022A1 FR2460022A1 (fr) | 1981-01-16 |
| FR2460022B1 true FR2460022B1 (fr) | 1987-09-11 |
Family
ID=26385603
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR8013058A Expired FR2460022B1 (fr) | 1979-06-25 | 1980-06-12 | Systeme optique de reproduction d'informations |
Country Status (5)
| Country | Link |
|---|---|
| CA (1) | CA1135851A (fr) |
| DE (1) | DE3023617A1 (fr) |
| FR (1) | FR2460022B1 (fr) |
| GB (1) | GB2052132B (fr) |
| NL (1) | NL8003540A (fr) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4406520A (en) * | 1980-08-14 | 1983-09-27 | Universal Pioneer Corporation | Beam splitter optical system of signal pickup device |
| JPS5958637A (ja) * | 1982-09-28 | 1984-04-04 | Sony Corp | 光学式再生装置 |
| JP2633535B2 (ja) * | 1986-09-18 | 1997-07-23 | ソニー株式会社 | 光学ピツクアツプ装置 |
| US4890901A (en) * | 1987-12-22 | 1990-01-02 | Hughes Aircraft Company | Color corrector for embedded prisms |
| KR100200873B1 (ko) * | 1996-01-11 | 1999-06-15 | 윤종용 | 광 픽업 장치 |
| DE19816040A1 (de) * | 1998-04-09 | 1999-10-14 | Heidelberger Druckmasch Ag | Verlaufsblende für Belichtungsgeräte |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2178245A (en) * | 1936-06-24 | 1939-10-31 | Klangfilm Gmbh | Sound recording apparatus |
| DE2638276C3 (de) * | 1976-08-25 | 1981-03-12 | Remy, Ernst, Dipl.-Phys. Dr., 8000 München | Optische Lochblende für lasertechnische Anwendungen |
| NL7703076A (nl) * | 1977-03-22 | 1978-09-26 | Philips Nv | Inrichting voor het uitlezen van een stralings- reflekterende registratiedrager. |
-
1980
- 1980-06-12 FR FR8013058A patent/FR2460022B1/fr not_active Expired
- 1980-06-18 NL NL8003540A patent/NL8003540A/nl not_active Application Discontinuation
- 1980-06-19 CA CA000354379A patent/CA1135851A/fr not_active Expired
- 1980-06-20 GB GB8020215A patent/GB2052132B/en not_active Expired
- 1980-06-24 DE DE19803023617 patent/DE3023617A1/de not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| NL8003540A (nl) | 1980-12-30 |
| CA1135851A (fr) | 1982-11-16 |
| DE3023617A1 (de) | 1981-01-08 |
| GB2052132B (en) | 1983-07-06 |
| FR2460022A1 (fr) | 1981-01-16 |
| GB2052132A (en) | 1981-01-21 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| ST | Notification of lapse |