JP2641421B2 - 光学的検出方法、光学的情報再生装置、及び信号検出回路 - Google Patents

光学的検出方法、光学的情報再生装置、及び信号検出回路

Info

Publication number
JP2641421B2
JP2641421B2 JP60055834A JP5583485A JP2641421B2 JP 2641421 B2 JP2641421 B2 JP 2641421B2 JP 60055834 A JP60055834 A JP 60055834A JP 5583485 A JP5583485 A JP 5583485A JP 2641421 B2 JP2641421 B2 JP 2641421B2
Authority
JP
Japan
Prior art keywords
signal
mark
differential signal
output
light
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
Application number
JP60055834A
Other languages
English (en)
Japanese (ja)
Other versions
JPS61216127A (ja
Inventor
武志 前田
滋 中村
久貴 杉山
和男 重松
温 斉藤
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.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP60055834A priority Critical patent/JP2641421B2/ja
Priority to US06/828,719 priority patent/US4743774A/en
Priority to NL8600378A priority patent/NL194521C/nl
Priority to DE19863604723 priority patent/DE3604723A1/de
Publication of JPS61216127A publication Critical patent/JPS61216127A/ja
Application granted granted Critical
Publication of JP2641421B2 publication Critical patent/JP2641421B2/ja
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
    • G11B7/005—Reproducing
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/10009—Improvement or modification of read or write signals

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Optical Recording Or Reproduction (AREA)
JP60055834A 1985-03-22 1985-03-22 光学的検出方法、光学的情報再生装置、及び信号検出回路 Expired - Lifetime JP2641421B2 (ja)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP60055834A JP2641421B2 (ja) 1985-03-22 1985-03-22 光学的検出方法、光学的情報再生装置、及び信号検出回路
US06/828,719 US4743774A (en) 1985-03-22 1986-02-12 Method and apparatus for optical detection of information
NL8600378A NL194521C (nl) 1985-03-22 1986-02-14 Inrichting voor het optisch detecteren van informatie.
DE19863604723 DE3604723A1 (de) 1985-03-22 1986-02-14 Verfahren und vorrichtung zur optischen erfassung von informationen

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP60055834A JP2641421B2 (ja) 1985-03-22 1985-03-22 光学的検出方法、光学的情報再生装置、及び信号検出回路

Publications (2)

Publication Number Publication Date
JPS61216127A JPS61216127A (ja) 1986-09-25
JP2641421B2 true JP2641421B2 (ja) 1997-08-13

Family

ID=13010007

Family Applications (1)

Application Number Title Priority Date Filing Date
JP60055834A Expired - Lifetime JP2641421B2 (ja) 1985-03-22 1985-03-22 光学的検出方法、光学的情報再生装置、及び信号検出回路

Country Status (4)

Country Link
US (1) US4743774A (OSRAM)
JP (1) JP2641421B2 (OSRAM)
DE (1) DE3604723A1 (OSRAM)
NL (1) NL194521C (OSRAM)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0775047B2 (ja) * 1987-02-25 1995-08-09 株式会社東芝 信号処理回路
JPH0731820B2 (ja) * 1987-08-31 1995-04-10 三菱電機株式会社 光デイスク駆動装置
US4954903A (en) * 1987-09-21 1990-09-04 Sharp Kabushiki Kaisha Digital signal reproduction apparatus for reading magneto-optical disks
US5151580A (en) * 1990-08-03 1992-09-29 Symbol Technologies, Inc. Light emitting diode scanner
JPH07101429B2 (ja) * 1989-05-30 1995-11-01 富士通株式会社 バーコードリーダーのアナログ信号処理方式
US5140146A (en) * 1989-11-20 1992-08-18 Symbol Technologies, Inc. Bar code symbol reader with modulation enhancement
JPH04209323A (ja) * 1990-12-07 1992-07-30 Olympus Optical Co Ltd 光学的情報記録／再生装置の読取り信号処理回路
EP0548937B1 (en) * 1991-12-27 1997-05-28 Matsushita Electric Industrial Co., Ltd. Optical disk reading apparatus
JP3134508B2 (ja) * 1992-06-23 2001-02-13 ソニー株式会社 光記録媒体の信号検出方法
DE4226777A1 (de) * 1992-08-13 1994-02-17 Thomson Brandt Gmbh Rauschanteilverringerung im Datensignal und optische Abtastvorrichtung
US5461223A (en) * 1992-10-09 1995-10-24 Eastman Kodak Company Bar code detecting circuitry
BE1007852A3 (nl) * 1993-12-03 1995-11-07 Philips Electronics Nv Compatibele optische uitleesinrichting.
JP2699914B2 (ja) * 1995-03-09 1998-01-19 日本電気株式会社 記録再生方法および装置
JP3042458B2 (ja) * 1997-08-25 2000-05-15 日本電気株式会社 情報記録再生装置及び情報記録再生方法
US10742183B2 (en) * 2018-12-21 2020-08-11 Industrial Technology Research Institute Processing device for position sensing comprising a transforming differential current signal to a voltage signal performance

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3252099A (en) * 1963-05-27 1966-05-17 Ibm Waveform shaping system for slimming filter control and symmetrizing
NL7402012A (nl) * 1974-02-14 1975-08-18 Philips Nv Registratiedrager waarop informatie is aange- bracht in een optisch uitleesbare struktuur.
JPS6040093B2 (ja) * 1978-09-09 1985-09-09 パイオニアビデオ株式会社 トラッキングサ−ボ引込装置
JPS57198546A (en) * 1981-05-29 1982-12-06 Fuji Xerox Co Ltd Optical information recording and reproducing method
JPS5873021A (ja) * 1981-10-26 1983-05-02 Hitachi Ltd 光デイスク装置
US4475183A (en) * 1981-10-26 1984-10-02 Eastman Kodak Company Optical disk retrieval methods, media and systems employing digital data of high fractional bandwidth
JPS58143412A (ja) * 1982-02-18 1983-08-26 Mitsubishi Electric Corp 磁気記録装置の読取方式
JPS58171727A (ja) * 1982-03-31 1983-10-08 Fujitsu Ltd 光デイスク・デ−タ処理方式
JPS5979409A (ja) * 1982-10-29 1984-05-08 Sony Corp デイジタル信号復元方式

Also Published As

Publication number Publication date
DE3604723C2 (OSRAM) 1989-03-23
DE3604723A1 (de) 1986-10-02
NL194521B (nl) 2002-02-01
NL8600378A (nl) 1986-10-16
US4743774A (en) 1988-05-10
JPS61216127A (ja) 1986-09-25
NL194521C (nl) 2002-06-04

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