DE3683833D1 - Optischer kopf. - Google Patents
Optischer kopf.Info
- Publication number
- DE3683833D1 DE3683833D1 DE8686116357T DE3683833T DE3683833D1 DE 3683833 D1 DE3683833 D1 DE 3683833D1 DE 8686116357 T DE8686116357 T DE 8686116357T DE 3683833 T DE3683833 T DE 3683833T DE 3683833 D1 DE3683833 D1 DE 3683833D1
- Authority
- DE
- Germany
- Prior art keywords
- optical head
- optical
- head
- 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 - Lifetime
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
- G11B7/1395—Beam splitters or combiners
-
- 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
- G11B7/08—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
-
- 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
- G11B7/0916—Foucault or knife-edge methods
-
- 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
- G11B7/1372—Lenses
- G11B7/1378—Separate aberration correction lenses; Cylindrical lenses to generate astigmatism; Beam expanders
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Head (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP60269649A JPS62129944A (ja) | 1985-11-30 | 1985-11-30 | 光学ヘツド |
JP61006911A JPS62165744A (ja) | 1986-01-16 | 1986-01-16 | 光学ヘツド |
Publications (1)
Publication Number | Publication Date |
---|---|
DE3683833D1 true DE3683833D1 (de) | 1992-03-19 |
Family
ID=26341134
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE8686116357T Expired - Lifetime DE3683833D1 (de) | 1985-11-30 | 1986-11-25 | Optischer kopf. |
Country Status (4)
Country | Link |
---|---|
US (1) | US4783589A (de) |
EP (1) | EP0224853B1 (de) |
KR (1) | KR900003687B1 (de) |
DE (1) | DE3683833D1 (de) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5270996A (en) * | 1986-12-25 | 1993-12-14 | Nec Corporation | Optical head with diffraction grating producing five diffracted detection light beams |
US4933924A (en) * | 1987-07-03 | 1990-06-12 | Seiko Epson Corporation | Optical head and magneto-optical read/write device |
US5070493A (en) * | 1989-05-22 | 1991-12-03 | Hewlett-Packard Company | Wedge prism assembly for optical information storage |
JP2781625B2 (ja) * | 1989-12-13 | 1998-07-30 | 株式会社日立製作所 | 情報処理装置 |
JP2617237B2 (ja) * | 1990-08-28 | 1997-06-04 | シャープ株式会社 | 光スポット位置検出装置 |
JP3736812B2 (ja) * | 1994-06-13 | 2006-01-18 | パイオニア株式会社 | 光学式ピックアップ装置 |
US5991102A (en) * | 1994-11-25 | 1999-11-23 | Asahi Kogaku Kogyo Kabushiki Kaisha | Beam protecting device |
JP2001034999A (ja) * | 1999-05-14 | 2001-02-09 | Fujitsu Ltd | 光情報記憶装置および光学素子 |
KR20010007585A (ko) * | 1999-06-30 | 2001-01-26 | 마찌다 가쯔히꼬 | 상이한 깊이로 피트들이 형성되어 있는 광 디스크, 이 광디스크를 재생하기 위한 광 디스크 디바이스, 및 재생 방법 |
KR100813943B1 (ko) * | 2001-04-30 | 2008-03-14 | 삼성전자주식회사 | 복합 반사프리즘 및 이를 채용한 광픽업장치 |
TWI406025B (zh) | 2010-11-25 | 2013-08-21 | Ind Tech Res Inst | 自動聚焦裝置及方法 |
Family Cites Families (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2325953A1 (fr) * | 1975-09-29 | 1977-04-22 | Thomson Brandt | Senseur optique de focalisation et dispositif de focalisation comportant un tel senseur |
JPS5746334A (en) * | 1980-09-01 | 1982-03-16 | Matsushita Electric Ind Co Ltd | Optical information reproducer |
JPS5812146A (ja) * | 1981-07-14 | 1983-01-24 | Matsushita Electric Ind Co Ltd | 光学的情報再生ヘツド |
JPS5870434A (ja) * | 1981-10-22 | 1983-04-26 | Toshiba Corp | 光学ヘツド |
DE3382020D1 (de) * | 1982-07-15 | 1991-01-10 | Matsushita Electric Ind Co Ltd | Kopf zum optischen aufzeichnen und wiedergeben. |
JPS59147306A (ja) * | 1983-02-10 | 1984-08-23 | Sony Corp | フオ−カス誤差検出装置 |
JPS6038742A (ja) * | 1983-08-12 | 1985-02-28 | Hitachi Ltd | 光学ヘッド |
JPS6057548A (ja) * | 1983-09-07 | 1985-04-03 | Hitachi Ltd | 光学ヘッド |
JPS6076041A (ja) * | 1983-09-30 | 1985-04-30 | Toshiba Corp | 光学ヘツド |
US4687917A (en) * | 1983-10-19 | 1987-08-18 | Nippon Kogaku K. K. | Focus detecting device for removing vignetting effects |
JPS60115032A (ja) * | 1983-11-25 | 1985-06-21 | Toshiba Corp | 光学ヘッド |
JPS60131648A (ja) * | 1983-12-19 | 1985-07-13 | Toshiba Corp | 光学ヘツド |
JPS60246025A (ja) * | 1984-05-21 | 1985-12-05 | Victor Co Of Japan Ltd | 光学的情報信号再生装置におけるピツクアツプ装置 |
JPS60246024A (ja) * | 1984-05-22 | 1985-12-05 | Canon Inc | 光学式情報処理装置 |
JPH069090B2 (ja) * | 1984-06-12 | 1994-02-02 | 株式会社東芝 | 光学ヘツド |
US4797868A (en) * | 1985-05-15 | 1989-01-10 | Kabushiki Kaisha Toshiba | Optical system employing a laser beam for focusing, tracking and transferring information signals with respect to a magneto-optical memory |
-
1986
- 1986-11-25 DE DE8686116357T patent/DE3683833D1/de not_active Expired - Lifetime
- 1986-11-25 EP EP86116357A patent/EP0224853B1/de not_active Expired - Lifetime
- 1986-11-26 US US06/935,348 patent/US4783589A/en not_active Expired - Lifetime
- 1986-11-29 KR KR1019860010186A patent/KR900003687B1/ko not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
US4783589A (en) | 1988-11-08 |
KR900003687B1 (ko) | 1990-05-30 |
EP0224853A3 (en) | 1988-07-13 |
EP0224853A2 (de) | 1987-06-10 |
KR870005356A (ko) | 1987-06-08 |
EP0224853B1 (de) | 1992-02-05 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE244827T1 (de) | Optischer kopf. | |
DE3687392D1 (de) | Optischer kopf. | |
DE68921065D1 (de) | Optischer kopf. | |
DE3673951D1 (de) | Stirnfraeser. | |
DE69023585T2 (de) | Optischer Kopf. | |
DE3280232D1 (de) | Optischer kopf. | |
DE3887762T2 (de) | Optischer Kopf. | |
DE3776945D1 (de) | Optischer kopf. | |
DE3280201D1 (de) | Optischer kopf. | |
DE3680865D1 (de) | Optischer kopf. | |
DE3852307D1 (de) | Optischer kopf. | |
DE3672530D1 (de) | Verbindungskopf. | |
DE69020417D1 (de) | Optischer Kopf. | |
DE3482146D1 (de) | Optischer kopf. | |
DE3784859T2 (de) | Optischer Kopf. | |
DE3778670D1 (de) | Optischer kopf. | |
DE69022447D1 (de) | Optischer Kopf. | |
DE69022318D1 (de) | Fliegender optischer Kopf. | |
DE3486047T2 (de) | Optischer kopf. | |
DE3683833D1 (de) | Optischer kopf. | |
DE3886930D1 (de) | Optischer kopf. | |
DE69018503T2 (de) | Optischer Kopf. | |
DE3751396D1 (de) | Thermischer Kopf. | |
DE3484678D1 (de) | Optischer kopf. | |
DE3683634D1 (de) | Anordnung mit optischem kopf. |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
8364 | No opposition during term of opposition | ||
8339 | Ceased/non-payment of the annual fee |