JP2001141432A5 - - Google Patents

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Publication number
JP2001141432A5
JP2001141432A5 JP1999320309A JP32030999A JP2001141432A5 JP 2001141432 A5 JP2001141432 A5 JP 2001141432A5 JP 1999320309 A JP1999320309 A JP 1999320309A JP 32030999 A JP32030999 A JP 32030999A JP 2001141432 A5 JP2001141432 A5 JP 2001141432A5
Authority
JP
Japan
Prior art keywords
rotation position
position information
rotating object
detection device
frequency signal
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
JP1999320309A
Other languages
English (en)
Japanese (ja)
Other versions
JP2001141432A (ja
JP4298093B2 (ja
Filing date
Publication date
Application filed filed Critical
Priority to JP32030999A priority Critical patent/JP4298093B2/ja
Priority claimed from JP32030999A external-priority patent/JP4298093B2/ja
Priority to US09/704,704 priority patent/US6829118B1/en
Publication of JP2001141432A publication Critical patent/JP2001141432A/ja
Priority to US10/915,347 priority patent/US7202979B2/en
Publication of JP2001141432A5 publication Critical patent/JP2001141432A5/ja
Application granted granted Critical
Publication of JP4298093B2 publication Critical patent/JP4298093B2/ja
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

JP32030999A 1999-11-10 1999-11-10 光学式回転位置情報検出装置 Expired - Fee Related JP4298093B2 (ja)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP32030999A JP4298093B2 (ja) 1999-11-10 1999-11-10 光学式回転位置情報検出装置
US09/704,704 US6829118B1 (en) 1999-11-10 2000-11-03 Optical rotational position information detecting apparatus
US10/915,347 US7202979B2 (en) 1999-11-10 2004-08-11 Optical rotational position information detecting apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP32030999A JP4298093B2 (ja) 1999-11-10 1999-11-10 光学式回転位置情報検出装置

Publications (3)

Publication Number Publication Date
JP2001141432A JP2001141432A (ja) 2001-05-25
JP2001141432A5 true JP2001141432A5 (enExample) 2007-01-11
JP4298093B2 JP4298093B2 (ja) 2009-07-15

Family

ID=18120063

Family Applications (1)

Application Number Title Priority Date Filing Date
JP32030999A Expired - Fee Related JP4298093B2 (ja) 1999-11-10 1999-11-10 光学式回転位置情報検出装置

Country Status (2)

Country Link
US (2) US6829118B1 (enExample)
JP (1) JP4298093B2 (enExample)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20060014155A (ko) * 2004-08-10 2006-02-15 삼성전자주식회사 디스크 기록 장치
JP2006351109A (ja) * 2005-06-16 2006-12-28 Matsushita Electric Ind Co Ltd 光ディスク信号処理装置及び光ディスク再生装置
US7495857B1 (en) 2005-12-30 2009-02-24 Western Digital Technologies, Inc. Servo writing a disk drive by writing spiral tracks using a mechanical position sensor
US7619844B1 (en) * 2005-12-30 2009-11-17 Western Digital Technologies, Inc. Disk drive comprising a mechanical position sensor to prevent a runaway condition
US7480116B1 (en) 2006-01-20 2009-01-20 Western Digital Technologies, Inc. Disk drive employing coarse position feedback from mechanical position sensor to improve format efficiency
US7924519B2 (en) * 2008-09-29 2011-04-12 Wd Media, Inc. Eccentricity determination for a disk
JP2010175493A (ja) * 2009-02-02 2010-08-12 Canon Inc レーザードップラー速度計
US8792193B2 (en) * 2009-03-27 2014-07-29 Agency For Science, Technology And Research Magnetic media tester and a method of magnetic media testing
EP2691328B1 (en) 2011-03-31 2017-05-03 Otis Elevator Company Optics based sensor device
CN109917148A (zh) * 2019-04-08 2019-06-21 中国人民解放军战略支援部队航天工程大学 基于叠加态涡旋光的物体转动方向探测装置
JP2021047944A (ja) 2019-09-18 2021-03-25 株式会社東芝 磁気ディスク装置

Family Cites Families (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2899165B2 (ja) 1992-05-15 1999-06-02 キヤノン株式会社 ドップラー速度計及び変位情報検出装置
JPH06197015A (ja) * 1992-12-24 1994-07-15 Canon Inc 周波数発振装置、周期エラー検出装置、フィルター装置、信号判定装置、及びそれを用いたドップラー速度計
US5502466A (en) 1993-06-29 1996-03-26 Canon Kabushiki Kaisha Doppler velocimeter and position information detection apparatus for use with objects having variations in surface depth
JPH0729229A (ja) 1993-07-13 1995-01-31 Pioneer Electron Corp 光磁気ディスク、光磁気ディスク記録装置及び光磁気ディスク再生装置
US6057976A (en) * 1994-04-28 2000-05-02 Canon Kabushiki Kaisha Apparatus for detecting rotational displacement information of a rotating object
JP3491969B2 (ja) 1994-06-27 2004-02-03 キヤノン株式会社 変位情報測定装置
JP3513247B2 (ja) 1994-07-11 2004-03-31 キヤノン株式会社 周波数シフター及びそれを用いた光学式変位計測装置
JP3450446B2 (ja) 1994-08-03 2003-09-22 キヤノン株式会社 光学式変位検出装置
US5815267A (en) 1994-09-09 1998-09-29 Canon Kabushiki Kaisha Displacement information measuring apparatus in which a light-receiving condition on a photodetector is adjustable
US5796470A (en) 1995-02-28 1998-08-18 Canon Kabushiki Kaisha Frequency shifter and optical displacement measuring apparatus using the frequency shifter
JP3492012B2 (ja) 1995-03-09 2004-02-03 キヤノン株式会社 変位情報検出装置
JPH08304430A (ja) 1995-05-12 1996-11-22 Canon Inc 周波数シフタ及びそれを用いた光学式変位計測装置
US5796089A (en) * 1995-09-21 1998-08-18 Symbol Technologies, Inc. Bar code scanner with simplified auto-focus capability
JPH09113523A (ja) 1995-10-23 1997-05-02 Canon Inc ドップラー速度計及び駆動システム
JP3647135B2 (ja) 1996-04-15 2005-05-11 キヤノン株式会社 光学式変位情報測定装置
US6151185A (en) 1996-09-05 2000-11-21 Canon Kabushiki Kaisha Position detecting apparatus, positioning apparatus, and information recording apparatus using the same
JPH10227858A (ja) 1997-02-13 1998-08-25 Canon Inc 変位情報測定装置
US6631047B2 (en) 1997-09-22 2003-10-07 Canon Kabushiki Kaisha Interference device, position detecting device, positioning device and information recording apparatus using the same
JP2000321021A (ja) * 1999-05-10 2000-11-24 Canon Inc 干渉装置、変位測定装置、及びそれを用いた情報記録又は／及び再生装置
JP4080281B2 (ja) * 2002-09-10 2008-04-23 Ｙｋｋ株式会社 ボタン取付機械におけるボタン位置出し装置

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