DE3913229A1 - Wiedergabegeraet fuer optische informationen - Google Patents

Wiedergabegeraet fuer optische informationen

Info

Publication number
DE3913229A1
DE3913229A1 DE3913229A DE3913229A DE3913229A1 DE 3913229 A1 DE3913229 A1 DE 3913229A1 DE 3913229 A DE3913229 A DE 3913229A DE 3913229 A DE3913229 A DE 3913229A DE 3913229 A1 DE3913229 A1 DE 3913229A1
Authority
DE
Germany
Prior art keywords
light
optical
optical unit
photodetector
recording medium
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.)
Granted
Application number
DE3913229A
Other languages
German (de)
English (en)
Other versions
DE3913229C2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html
Inventor
Kiyofumi Chikuma
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Pioneer Corp
Original Assignee
Pioneer Electronic Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Pioneer Electronic Corp filed Critical Pioneer Electronic Corp
Publication of DE3913229A1 publication Critical patent/DE3913229A1/de
Application granted granted Critical
Publication of DE3913229C2 publication Critical patent/DE3913229C2/de
Granted legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B82—NANOTECHNOLOGY
    • B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
    • B82Y10/00—Nanotechnology for information processing, storage or transmission, e.g. quantum computing or single electron logic
    • 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
    • G11B7/125—Optical beam sources therefor, e.g. laser control circuitry specially adapted for optical storage devices; Modulators, e.g. means for controlling the size or intensity of optical spots or optical traces
    • 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
    • G11B7/13—Optical detectors therefor
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Nanotechnology (AREA)
  • Mathematical Physics (AREA)
  • Theoretical Computer Science (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Optical Head (AREA)
  • Optical Recording Or Reproduction (AREA)
DE3913229A 1988-09-19 1989-04-21 Wiedergabegeraet fuer optische informationen Granted DE3913229A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP23403288 1988-09-19

Publications (2)

Publication Number Publication Date
DE3913229A1 true DE3913229A1 (de) 1990-03-22
DE3913229C2 DE3913229C2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1993-08-19

Family

ID=16964493

Family Applications (1)

Application Number Title Priority Date Filing Date
DE3913229A Granted DE3913229A1 (de) 1988-09-19 1989-04-21 Wiedergabegeraet fuer optische informationen

Country Status (3)

Country Link
JP (1) JP2933321B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
DE (1) DE3913229A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
NL (1) NL8901061A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0658884A1 (en) * 1993-12-09 1995-06-21 Canon Kabushiki Kaisha Optical recording/reproduction apparatus
EP0713212A3 (en) * 1994-11-17 1997-03-05 Canon Kk Optical information recording and reproducing apparatus
EP0790607A1 (en) * 1996-02-15 1997-08-20 Nec Corporation Photodetector used for optical head

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH497019A (de) * 1967-10-11 1970-09-30 Rca Corp Vorrichtung zum Transformieren eines Lichtstrahls
DE2431265A1 (de) * 1973-06-28 1975-01-23 Canon Kk Optische einrichtung zum erzeugen eines sehr kleinen lichtbuendels
DE2453364B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * 1973-11-09 1978-06-22 Hitachi, Ltd., Tokio
DE3137099A1 (de) * 1980-09-17 1982-05-06 Olympus Optical Co., Ltd., Tokyo Vorrichtung zur erfassung der position eines optischen strahles
EP0130831A2 (en) * 1983-06-30 1985-01-09 Kabushiki Kaisha Toshiba Apparatus for detecting a focusing state of an optical system
EP0346884A2 (en) * 1988-06-16 1989-12-20 Yakult Honsha Co., Ltd. Production process of kefir-like fermented milk

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56116004A (en) * 1980-02-20 1981-09-11 Olympus Optical Co Ltd Lens for video disk
JPS5713953A (en) * 1980-06-25 1982-01-25 Hitachi Ltd Three-phase ac generator for bicycle
JPS61220147A (ja) * 1985-03-27 1986-09-30 Toshiba Corp 光学ヘツド
JPS6366543A (ja) * 1986-09-09 1988-03-25 Ricoh Co Ltd 光記録方法

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH497019A (de) * 1967-10-11 1970-09-30 Rca Corp Vorrichtung zum Transformieren eines Lichtstrahls
DE2431265A1 (de) * 1973-06-28 1975-01-23 Canon Kk Optische einrichtung zum erzeugen eines sehr kleinen lichtbuendels
DE2453364B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * 1973-11-09 1978-06-22 Hitachi, Ltd., Tokio
DE3137099A1 (de) * 1980-09-17 1982-05-06 Olympus Optical Co., Ltd., Tokyo Vorrichtung zur erfassung der position eines optischen strahles
EP0130831A2 (en) * 1983-06-30 1985-01-09 Kabushiki Kaisha Toshiba Apparatus for detecting a focusing state of an optical system
EP0346884A2 (en) * 1988-06-16 1989-12-20 Yakult Honsha Co., Ltd. Production process of kefir-like fermented milk

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0658884A1 (en) * 1993-12-09 1995-06-21 Canon Kabushiki Kaisha Optical recording/reproduction apparatus
US6141302A (en) * 1993-12-09 2000-10-31 Canon Kabushiki Kaisha Optical recording/reproducing apparatus including a mask device for masking marginal rays, in a direction perpendicular to a recording medium track, of a light beam returned from the recording medium
US6282165B1 (en) 1993-12-09 2001-08-28 Canon Kabushiki Kaisha Optical recording/reproducing apparatus including a mask device for masking marginal rays, in a direction perpendicular to a recording medium track, of a light beam returned from the recording medium
EP1174867A1 (en) * 1993-12-09 2002-01-23 Canon Kabushiki Kaisha Optical recording/reproduction apparatus
US6418109B2 (en) 1993-12-09 2002-07-09 Canon Kabushiki Kaisha Optical recording/reproducing apparatus including a mask device for masking marginal rays, in a direction perpendicular to a recording medium track, of a light beam returned from the recording medium
EP0713212A3 (en) * 1994-11-17 1997-03-05 Canon Kk Optical information recording and reproducing apparatus
US5657305A (en) * 1994-11-17 1997-08-12 Canon Kabushiki Kaisha Optical information recording and reproducing apparatus including a total reflection surface or a light shield plate disposed between a polarized light separating surface and a detection device for light beam compensation
EP0790607A1 (en) * 1996-02-15 1997-08-20 Nec Corporation Photodetector used for optical head
US5872759A (en) * 1996-02-15 1999-02-16 Nec Corporation Photodetector with regions to detect reflected light pass through central portion and non-central portion of an objective lens

Also Published As

Publication number Publication date
JPH02168439A (ja) 1990-06-28
JP2933321B2 (ja) 1999-08-09
DE3913229C2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1993-08-19
NL8901061A (nl) 1990-04-17

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Legal Events

Date Code Title Description
OM8 Search report available as to paragraph 43 lit. 1 sentence 1 patent law
OP8 Request for examination as to paragraph 44 patent law
8120 Willingness to grant licences paragraph 23
D2 Grant after examination
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee