KR880002635B1 - Optical head apparatus - Google Patents
Optical head apparatusInfo
- Publication number
- KR880002635B1 KR880002635B1 KR8204975A KR820004975A KR880002635B1 KR 880002635 B1 KR880002635 B1 KR 880002635B1 KR 8204975 A KR8204975 A KR 8204975A KR 820004975 A KR820004975 A KR 820004975A KR 880002635 B1 KR880002635 B1 KR 880002635B1
- Authority
- KR
- South Korea
- Prior art keywords
- disc
- optical head
- optical
- hologram
- head apparatus
- Prior art date
Links
- 230000003287 optical effect Effects 0.000 title abstract 4
- 239000004065 semiconductor Substances 0.000 abstract 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
- G11B7/12—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
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/10—Beam splitting or combining systems
- G02B27/16—Beam splitting or combining systems used as aids for focusing
-
- 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
-
- 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
- G11B7/0925—Electromechanical actuators for lens positioning
- G11B7/093—Electromechanical actuators for lens positioning for focusing and tracking
-
- 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
- G11B7/0925—Electromechanical actuators for lens positioning
- G11B7/0937—Piezoelectric actuators
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- General Physics & Mathematics (AREA)
- Optical Head (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56176749A JPS5880139A (ja) | 1981-11-04 | 1981-11-04 | 光学ヘツド |
| JP176749 | 1981-11-04 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR840002561A KR840002561A (ko) | 1984-07-02 |
| KR880002635B1 true KR880002635B1 (en) | 1988-12-07 |
Family
ID=16019131
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR8204975A KR880002635B1 (en) | 1981-11-04 | 1982-11-04 | Optical head apparatus |
Country Status (9)
| Country | Link |
|---|---|
| JP (1) | JPS5880139A (ko) |
| KR (1) | KR880002635B1 (ko) |
| AT (1) | AT376510B (ko) |
| AU (1) | AU556305B2 (ko) |
| CA (1) | CA1177165A (ko) |
| DE (1) | DE3240734C2 (ko) |
| FR (1) | FR2519458B1 (ko) |
| GB (1) | GB2109583B (ko) |
| NL (1) | NL8204248A (ko) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL8304212A (nl) * | 1983-12-07 | 1984-10-01 | Philips Nv | Enkelvoudige collimatorlens met een asferisch oppervlak. |
| CA1258906A (en) * | 1985-04-22 | 1989-08-29 | Hiroshi Oinoue | Semiconductor laser apparatus for optical head |
| JPS61269235A (ja) * | 1985-05-24 | 1986-11-28 | Omron Tateisi Electronics Co | 光情報処理装置 |
| JPS61269233A (ja) * | 1985-05-24 | 1986-11-28 | Omron Tateisi Electronics Co | 光情報処理装置 |
| JPH0687099B2 (ja) * | 1986-10-08 | 1994-11-02 | 富士通株式会社 | レ−ザ光走査装置 |
| CA2079620A1 (en) * | 1991-10-25 | 1993-04-26 | Roeland M. T. Hekker | Holographic elements for an optical recording system |
| US5272690A (en) * | 1992-03-05 | 1993-12-21 | International Business Machines Corporation | Hologram element system |
| KR970703580A (ko) * | 1995-03-29 | 1997-07-03 | 제이.지.에이. 롤페스 | 방사원, 검출기 및 그레이팅을 포함하는 광학유닛과, 광학유닛을 포함하는 스캐닝 장치(Optical unit comprising a radiation source, a detector and a grating, and scanning device including the optical unit) |
| GB0408383D0 (en) | 2004-04-15 | 2004-05-19 | Koninkl Philips Electronics Nv | A radio network and a method of operating a radio network |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4003059A (en) * | 1974-02-07 | 1977-01-11 | Canon Kabushiki Kaisha | Optical recorder having focus controlling means |
| NL176315C (nl) * | 1976-05-12 | 1985-03-18 | Philips Nv | Optische aftastinrichting. |
| NL7608561A (nl) * | 1976-08-02 | 1978-02-06 | Philips Nv | Optische uitleeseenheid voor het aftasten van een registratiedrager voorzien van een stra- lingsreflekterende informatiestruktuur. |
| CA1091966A (en) * | 1976-10-15 | 1980-12-23 | Chiaki Kojima | Apparatus for reading signals recorded on a record carrier |
| US4245882A (en) * | 1977-11-04 | 1981-01-20 | Environmental Research Institute Of Michigan | Doubly modulated on-axis thick hologram optical element |
| NL7713711A (nl) * | 1977-12-12 | 1979-06-14 | Philips Nv | Optisch uitleeseenheid voor het uitlezen van een bewegende informatiedrager, in het bijzonder voor het uitlezen van een videoplaat. |
| JPS54109801A (en) * | 1978-02-17 | 1979-08-28 | Toshiba Corp | Optical reader |
| JPS5573934A (en) * | 1978-11-20 | 1980-06-04 | Mansei Kogyo Kk | Reader for optical information |
| JPS55163566A (en) * | 1979-06-05 | 1980-12-19 | Sony Corp | Hologram lens and its production and optical system signal using this hologram lens |
| JPS5647933A (en) * | 1979-09-25 | 1981-04-30 | Sony Corp | Optical signal head |
| JPS5680836A (en) * | 1979-12-07 | 1981-07-02 | Seiko Instr & Electronics Ltd | Optical information reader |
-
1981
- 1981-11-04 JP JP56176749A patent/JPS5880139A/ja active Pending
-
1982
- 1982-11-01 AU AU90071/82A patent/AU556305B2/en not_active Expired
- 1982-11-02 NL NL8204248A patent/NL8204248A/nl active Search and Examination
- 1982-11-02 CA CA000414665A patent/CA1177165A/en not_active Expired
- 1982-11-03 GB GB08231383A patent/GB2109583B/en not_active Expired
- 1982-11-04 DE DE3240734A patent/DE3240734C2/de not_active Expired - Lifetime
- 1982-11-04 KR KR8204975A patent/KR880002635B1/ko active
- 1982-11-04 FR FR828218524A patent/FR2519458B1/fr not_active Expired - Lifetime
- 1982-11-04 AT AT0403082A patent/AT376510B/de not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| GB2109583A (en) | 1983-06-02 |
| DE3240734C2 (de) | 1995-11-30 |
| AT376510B (de) | 1984-11-26 |
| JPS5880139A (ja) | 1983-05-14 |
| GB2109583B (en) | 1985-07-17 |
| FR2519458A1 (fr) | 1983-07-08 |
| AU556305B2 (en) | 1986-10-30 |
| ATA403082A (de) | 1984-04-15 |
| CA1177165A (en) | 1984-10-30 |
| FR2519458B1 (fr) | 1991-07-19 |
| AU9007182A (en) | 1983-05-12 |
| KR840002561A (ko) | 1984-07-02 |
| DE3240734A1 (de) | 1983-05-19 |
| NL8204248A (nl) | 1983-06-01 |
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