NL8601974A - Inrichting voor het met optische straling aftasten van een stralingsreflekterend informatievlak. - Google Patents

Inrichting voor het met optische straling aftasten van een stralingsreflekterend informatievlak. Download PDF

Info

Publication number
NL8601974A
NL8601974A NL8601974A NL8601974A NL8601974A NL 8601974 A NL8601974 A NL 8601974A NL 8601974 A NL8601974 A NL 8601974A NL 8601974 A NL8601974 A NL 8601974A NL 8601974 A NL8601974 A NL 8601974A
Authority
NL
Netherlands
Prior art keywords
radiation
grating
reflected
information plane
detection system
Prior art date
Application number
NL8601974A
Other languages
English (en)
Dutch (nl)
Original Assignee
Philips Nv
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 Philips Nv filed Critical Philips Nv
Priority to NL8601974A priority Critical patent/NL8601974A/nl
Priority to US06/939,192 priority patent/US4771411A/en
Priority to EP87201391A priority patent/EP0255173A1/en
Priority to JP62187859A priority patent/JPS6352334A/ja
Priority to AU76352/87A priority patent/AU586607B2/en
Publication of NL8601974A publication Critical patent/NL8601974A/nl

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
    • G11B7/1353—Diffractive elements, e.g. holograms or gratings
    • 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
NL8601974A 1986-08-01 1986-08-01 Inrichting voor het met optische straling aftasten van een stralingsreflekterend informatievlak. NL8601974A (nl)

Priority Applications (5)

Application Number Priority Date Filing Date Title
NL8601974A NL8601974A (nl) 1986-08-01 1986-08-01 Inrichting voor het met optische straling aftasten van een stralingsreflekterend informatievlak.
US06/939,192 US4771411A (en) 1986-08-01 1986-12-08 Device for scanning a radiation-reflecting information surface with optical radiation
EP87201391A EP0255173A1 (en) 1986-08-01 1987-07-21 Device for scanning a radiation-reflecting information surface with optical radiation
JP62187859A JPS6352334A (ja) 1986-08-01 1987-07-29 光学式走査装置
AU76352/87A AU586607B2 (en) 1986-08-01 1987-07-31 Device for scanning a radiation-reflecting information surface with optical radiation

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL8601974 1986-08-01
NL8601974A NL8601974A (nl) 1986-08-01 1986-08-01 Inrichting voor het met optische straling aftasten van een stralingsreflekterend informatievlak.

Publications (1)

Publication Number Publication Date
NL8601974A true NL8601974A (nl) 1988-03-01

Family

ID=19848364

Family Applications (1)

Application Number Title Priority Date Filing Date
NL8601974A NL8601974A (nl) 1986-08-01 1986-08-01 Inrichting voor het met optische straling aftasten van een stralingsreflekterend informatievlak.

Country Status (5)

Country Link
US (1) US4771411A (ja)
EP (1) EP0255173A1 (ja)
JP (1) JPS6352334A (ja)
AU (1) AU586607B2 (ja)
NL (1) NL8601974A (ja)

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2597249B1 (fr) * 1986-04-11 1988-06-17 Thomson Csf Dispositif de lecture optique de support d'enregistrement optique
EP0253403B1 (en) * 1986-07-18 1993-07-14 Nec Corporation Diffraction grating using birefringence and optical head in which a linearly polarized beam is directed to a diffraction grating
EP0258890B1 (en) * 1986-09-02 1993-03-31 Fuji Photo Film Co., Ltd. Optical pickup apparatus
US4918675A (en) * 1986-12-04 1990-04-17 Pencom International Corporation Magneto-optical head with separate optical paths for error and data detection
US4905216A (en) * 1986-12-04 1990-02-27 Pencom International Corporation Method for constructing an optical head by varying a hologram pattern
US5270996A (en) * 1986-12-25 1993-12-14 Nec Corporation Optical head with diffraction grating producing five diffracted detection light beams
NL8702245A (nl) * 1987-09-21 1989-04-17 Philips Nv Inrichting voor het met optische straling aftasten van een stralingsreflekterend informatievlak.
US4929823A (en) * 1987-10-05 1990-05-29 Matsushita Electric Industrial Co., Ltd. Optical pickup head with holographic servo signal detection using a spot size detection system
US4850673A (en) * 1987-11-23 1989-07-25 U. S. Philips Corporation Optical scanning apparatus which detects scanning spot focus error
JPH0770065B2 (ja) * 1988-04-20 1995-07-31 シャープ株式会社 光ピックアップ装置
DE68909663T2 (de) * 1988-04-26 1994-04-07 Philips Nv Anordnung zum optischen Abtasten eines magneto-optischen Aufzeichnungsträgers.
EP0348221B1 (en) * 1988-06-23 1994-12-14 Sharp Kabushiki Kaisha An optical pickup apparatus
FR2646245B1 (fr) * 1989-04-25 1991-06-14 Thomson Csf Dispositif de lecture optique pour support d'enregistrement optique
JPH035935A (ja) * 1989-06-02 1991-01-11 Hitachi Cable Ltd 光ヘッドの焦点ずれ検出方式
NL8903013A (nl) * 1989-11-02 1991-06-03 Philips Nv Rasterobjektief en raster-bundelomvormer alsmede optische aftastinrichting voorzien van minstens een van deze elementen.
NL9002007A (nl) * 1990-09-12 1992-04-01 Philips Nv Inrichting voor het met optische straling aftasten van een informatievlak.
US5200946A (en) * 1991-10-02 1993-04-06 Honeywell Inc. Simple magneto-optic rewritable head for roughedized environments
JPH0845107A (ja) * 1994-08-01 1996-02-16 Oki Electric Ind Co Ltd 光記録・再生装置および情報記録用の媒体
JP2942718B2 (ja) * 1994-10-05 1999-08-30 富士通株式会社 光学的情報記録再生装置

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4289371A (en) * 1979-05-31 1981-09-15 Xerox Corporation Optical scanner using plane linear diffraction gratings on a rotating spinner
NL7907216A (nl) * 1979-09-28 1981-03-31 Philips Nv Optisch fokusfout-detektiestelsel.
JPS573235A (en) * 1980-06-07 1982-01-08 Ricoh Co Ltd Focus controlling method
NL8502835A (nl) * 1985-10-17 1987-05-18 Philips Nv Inrichting voor het met optische straling aftasten van een informatievlak.

Also Published As

Publication number Publication date
AU7635287A (en) 1988-02-04
US4771411A (en) 1988-09-13
EP0255173A1 (en) 1988-02-03
JPS6352334A (ja) 1988-03-05
AU586607B2 (en) 1989-07-13

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BV The patent application has lapsed