WO1996018166A2 - Optical unit for optically scanning an information surface, and optical scanning arrangement including the optical unit - Google Patents

Optical unit for optically scanning an information surface, and optical scanning arrangement including the optical unit Download PDF

Info

Publication number
WO1996018166A2
WO1996018166A2 PCT/IB1995/000969 IB9500969W WO9618166A2 WO 1996018166 A2 WO1996018166 A2 WO 1996018166A2 IB 9500969 W IB9500969 W IB 9500969W WO 9618166 A2 WO9618166 A2 WO 9618166A2
Authority
WO
WIPO (PCT)
Prior art keywords
optical
unit
objective system
entrance pupil
scanning
Prior art date
Application number
PCT/IB1995/000969
Other languages
English (en)
French (fr)
Other versions
WO1996018166A3 (en
Inventor
Gerard Eduard Van Rosmalen
Original Assignee
Philips Electronics N.V.
Philips Norden Ab
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 Electronics N.V., Philips Norden Ab filed Critical Philips Electronics N.V.
Priority to DE69517797T priority Critical patent/DE69517797T2/de
Priority to JP8517453A priority patent/JPH09509277A/ja
Priority to HK98114111.8A priority patent/HK1012747B/en
Priority to EP95934791A priority patent/EP0742924B1/en
Publication of WO1996018166A2 publication Critical patent/WO1996018166A2/en
Publication of WO1996018166A3 publication Critical patent/WO1996018166A3/en

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
    • G06K7/10544—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation by scanning of the records by radiation in the optical part of the electromagnetic spectrum
    • G06K7/10792—Special measures in relation to the object to be scanned
    • G06K7/10801—Multidistance reading
    • G06K7/10811—Focalisation
    • 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
    • G11B7/002—Recording, reproducing or erasing systems characterised by the shape or form of the carrier
    • G11B7/003—Recording, reproducing or erasing systems characterised by the shape or form of the carrier with webs, filaments or wires, e.g. belts, spooled tapes or films of quasi-infinite extent
    • 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
    • G11B7/085—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam into, or out of, its operative position or across tracks, otherwise than during the transducing operation, e.g. for adjustment or preliminary positioning or track change or selection
    • G11B7/08547—Arrangements for positioning the light beam only without moving the head, e.g. using static electro-optical elements
    • 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
    • G11B7/0932—Details of sprung supports
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
    • G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
    • G11B11/105—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
    • G11B11/1055—Disposition or mounting of transducers relative to record carriers
    • G11B11/10556—Disposition or mounting of transducers relative to record carriers with provision for moving or switching or masking the transducers in or out of their operative position
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
    • G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
    • G11B11/105—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
    • G11B11/1055—Disposition or mounting of transducers relative to record carriers
    • G11B11/10576—Disposition or mounting of transducers relative to record carriers with provision for moving the transducers for maintaining alignment or spacing relative to the carrier
    • 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
    • G11B7/0933—Details of stationary parts
    • 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
    • G11B7/0935—Details of the moving parts

Definitions

  • the optical unit 1 comprises a detection system for detecting the position and/or orientation of the polygon mirror 17.
  • This detection system which is not shown in the Figure, is preferably the optical detection system disclosed in EP 0,459,586 (PHN 13.344, herewith incorporated by reference).
  • the detection system comprises radiation-sensitive detection elements, which converts radiation spots into electric signals which provide information about the position and tilt of the polygon mirror.
  • a processing unit analyses this information, after which correcting output signals are applied to the electromagnetic suspension for the polygon mirror 17.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Electromagnetism (AREA)
  • Artificial Intelligence (AREA)
  • Toxicology (AREA)
  • General Health & Medical Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Optical Recording Or Reproduction (AREA)
  • Mechanical Optical Scanning Systems (AREA)
  • Optical Head (AREA)
  • Facsimile Scanning Arrangements (AREA)
PCT/IB1995/000969 1994-12-05 1995-11-06 Optical unit for optically scanning an information surface, and optical scanning arrangement including the optical unit WO1996018166A2 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DE69517797T DE69517797T2 (de) 1994-12-05 1995-11-06 Optische einheit zur optischen abtastung einer informationsoberfläche und optische abtastordnung einschliesslich dieser einheit
JP8517453A JPH09509277A (ja) 1994-12-05 1995-11-06 情報表面を光学的に走査する光学ユニット及び該光学ユニットを含む光学的走査装置
HK98114111.8A HK1012747B (en) 1994-12-05 1995-11-06 Optical unit for optically scanning an information surface, and optical scanning arrangement including the optical unit
EP95934791A EP0742924B1 (en) 1994-12-05 1995-11-06 Optical unit for optically scanning an information surface, and optical scanning arrangement including the optical unit

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP94203535 1994-12-05
EP94203535.3 1994-12-05

Publications (2)

Publication Number Publication Date
WO1996018166A2 true WO1996018166A2 (en) 1996-06-13
WO1996018166A3 WO1996018166A3 (en) 1996-08-29

Family

ID=8217429

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB1995/000969 WO1996018166A2 (en) 1994-12-05 1995-11-06 Optical unit for optically scanning an information surface, and optical scanning arrangement including the optical unit

Country Status (9)

Country Link
US (1) US5661704A (en, 2012)
EP (1) EP0742924B1 (en, 2012)
JP (1) JPH09509277A (en, 2012)
KR (1) KR100403493B1 (en, 2012)
CN (1) CN1067792C (en, 2012)
DE (1) DE69517797T2 (en, 2012)
MY (1) MY112194A (en, 2012)
TW (1) TW281758B (en, 2012)
WO (1) WO1996018166A2 (en, 2012)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998001851A1 (en) * 1996-07-04 1998-01-15 Philips Electronics N.V. Optical apparatus for scanning a tape-shaped record carrier
WO1998001720A3 (en) * 1996-07-03 1998-03-19 Philips Electronics Nv Position detection system for an object with at least five degrees of freedom

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5995269A (en) * 1996-10-09 1999-11-30 U.S. Philips Corporation Optical unit for optically scanning an information surface, and optical scanning arrangement including the optical unit
US7277424B1 (en) * 1998-07-21 2007-10-02 Dowling Eric M Method and apparatus for co-socket telephony
FR2797514B3 (fr) * 1999-08-10 2001-10-12 Thomson Csf Dispositif de lecture magneto-optique pour bandes magnetiques multipistes
US8514675B2 (en) * 2011-05-11 2013-08-20 Oracle International Corporation Suspension system for an optical pickup assembly
US9009745B2 (en) * 2012-11-15 2015-04-14 Oracle International Corporation Thin web optical media guiding method

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8105072A (nl) * 1981-11-10 1983-06-01 Philips Nv Electro-optische inrichting.
JPS62162261A (ja) * 1986-01-10 1987-07-18 Hitachi Ltd 光磁気記録再生装置
NL9001260A (nl) * 1990-06-01 1992-01-02 Philips Nv Aftastinrichting met een roteerbare spiegel, alsmede aandrijfeenheid ten gebruike in de aftastinrichting, en rotorlichaam ten gebruike in de aandrijfeenheid.
NL9001253A (nl) * 1990-06-01 1992-01-02 Philips Nv Inrichting voor het optisch bepalen van de positie en stand van een voorwerp en optisch inschrijf- en/of weergaveapparaat voorzien van een dergelijke inrichting.
KR940006129B1 (ko) * 1991-12-24 1994-07-06 삼성전자 주식회사 양면디스크 재생장치
US5321684A (en) * 1992-09-15 1994-06-14 Sri International Bidirectional sinusoidal scanning system
EP0695455A1 (en) * 1993-12-15 1996-02-07 Koninklijke Philips Electronics N.V. Optical scanning means

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998001720A3 (en) * 1996-07-03 1998-03-19 Philips Electronics Nv Position detection system for an object with at least five degrees of freedom
WO1998001851A1 (en) * 1996-07-04 1998-01-15 Philips Electronics N.V. Optical apparatus for scanning a tape-shaped record carrier

Also Published As

Publication number Publication date
EP0742924B1 (en) 2000-07-05
KR970700883A (ko) 1997-02-12
TW281758B (en, 2012) 1996-07-21
DE69517797D1 (de) 2000-08-10
US5661704A (en) 1997-08-26
EP0742924A1 (en) 1996-11-20
WO1996018166A3 (en) 1996-08-29
MY112194A (en) 2001-04-30
JPH09509277A (ja) 1997-09-16
HK1012747A1 (en) 1999-08-06
KR100403493B1 (ko) 2004-03-24
CN1144002A (zh) 1997-02-26
CN1067792C (zh) 2001-06-27
DE69517797T2 (de) 2001-02-22

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