JPS59231736A - フォーカスおよびトラッキング誤差検出装置 - Google Patents

フォーカスおよびトラッキング誤差検出装置

Info

Publication number
JPS59231736A
JPS59231736A JP10411983A JP10411983A JPS59231736A JP S59231736 A JPS59231736 A JP S59231736A JP 10411983 A JP10411983 A JP 10411983A JP 10411983 A JP10411983 A JP 10411983A JP S59231736 A JPS59231736 A JP S59231736A
Authority
JP
Japan
Prior art keywords
diffraction grating
light
focus
tracking error
diffracted
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
JP10411983A
Other languages
English (en)
Japanese (ja)
Other versions
JPH0370859B2 (en]
Inventor
Yoshihiro Katase
片瀬　順弘
Toshihiko Goto
敏彦 後藤
Masayuki Inoue
雅之 井上
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 JP10411983A priority Critical patent/JPS59231736A/ja
Publication of JPS59231736A publication Critical patent/JPS59231736A/ja
Publication of JPH0370859B2 publication Critical patent/JPH0370859B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Automatic Focus Adjustment (AREA)
  • Optical Recording Or Reproduction (AREA)
JP10411983A 1983-06-13 1983-06-13 フォーカスおよびトラッキング誤差検出装置 Granted JPS59231736A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10411983A JPS59231736A (ja) 1983-06-13 1983-06-13 フォーカスおよびトラッキング誤差検出装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10411983A JPS59231736A (ja) 1983-06-13 1983-06-13 フォーカスおよびトラッキング誤差検出装置

Publications (2)

Publication Number Publication Date
JPS59231736A true JPS59231736A (ja) 1984-12-26
JPH0370859B2 JPH0370859B2 (en]) 1991-11-11

Family

ID=14372234

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10411983A Granted JPS59231736A (ja) 1983-06-13 1983-06-13 フォーカスおよびトラッキング誤差検出装置

Country Status (1)

Country Link
JP (1) JPS59231736A (en])

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61233441A (ja) * 1985-04-09 1986-10-17 Canon Inc 光ヘツド装置
JPS62141651A (ja) * 1985-12-16 1987-06-25 Canon Inc 光ヘツド装置
JPS62172538A (ja) * 1986-01-24 1987-07-29 Nec Corp 光ヘツド装置
JPS62277640A (ja) * 1986-05-26 1987-12-02 Nec Corp 光ヘツド装置
JPH0714194A (ja) * 1992-08-24 1995-01-17 Mitsubishi Electric Corp 光ディスク装置
US5408450A (en) * 1988-06-23 1995-04-18 Sharp Kabushiki Kaisha Optical pickup apparatus
US5745265A (en) * 1995-02-07 1998-04-28 Fujitsu Limited Optical element utilized for optical storage unit and optical device including the optical element

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61233441A (ja) * 1985-04-09 1986-10-17 Canon Inc 光ヘツド装置
JPS62141651A (ja) * 1985-12-16 1987-06-25 Canon Inc 光ヘツド装置
JPS62172538A (ja) * 1986-01-24 1987-07-29 Nec Corp 光ヘツド装置
JPS62277640A (ja) * 1986-05-26 1987-12-02 Nec Corp 光ヘツド装置
US5408450A (en) * 1988-06-23 1995-04-18 Sharp Kabushiki Kaisha Optical pickup apparatus
JPH0714194A (ja) * 1992-08-24 1995-01-17 Mitsubishi Electric Corp 光ディスク装置
US5745265A (en) * 1995-02-07 1998-04-28 Fujitsu Limited Optical element utilized for optical storage unit and optical device including the optical element

Also Published As

Publication number Publication date
JPH0370859B2 (en]) 1991-11-11

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