JPS63157819U - - Google Patents

Info

Publication number
JPS63157819U
JPS63157819U JP4961687U JP4961687U JPS63157819U JP S63157819 U JPS63157819 U JP S63157819U JP 4961687 U JP4961687 U JP 4961687U JP 4961687 U JP4961687 U JP 4961687U JP S63157819 U JPS63157819 U JP S63157819U
Authority
JP
Japan
Prior art keywords
photodetectors
output
pair
focus error
magneto
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.)
Pending
Application number
JP4961687U
Other languages
English (en)
Japanese (ja)
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 filed Critical
Priority to JP4961687U priority Critical patent/JPS63157819U/ja
Publication of JPS63157819U publication Critical patent/JPS63157819U/ja
Pending legal-status Critical Current

Links

Landscapes

  • Optical Recording Or Reproduction (AREA)
JP4961687U 1987-03-31 1987-03-31 Pending JPS63157819U (US20020128544A1-20020912-P00008.png)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4961687U JPS63157819U (US20020128544A1-20020912-P00008.png) 1987-03-31 1987-03-31

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4961687U JPS63157819U (US20020128544A1-20020912-P00008.png) 1987-03-31 1987-03-31

Publications (1)

Publication Number Publication Date
JPS63157819U true JPS63157819U (US20020128544A1-20020912-P00008.png) 1988-10-17

Family

ID=30872233

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4961687U Pending JPS63157819U (US20020128544A1-20020912-P00008.png) 1987-03-31 1987-03-31

Country Status (1)

Country Link
JP (1) JPS63157819U (US20020128544A1-20020912-P00008.png)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60212835A (ja) * 1984-04-09 1985-10-25 Mitsubishi Electric Corp 光学式情報記録再生装置
JPS61175939A (ja) * 1985-01-29 1986-08-07 Matsushita Electric Ind Co Ltd 焦点検出装置
JPS61206944A (ja) * 1985-03-11 1986-09-13 Hitachi Ltd 光磁気ディスク用の信号検出装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60212835A (ja) * 1984-04-09 1985-10-25 Mitsubishi Electric Corp 光学式情報記録再生装置
JPS61175939A (ja) * 1985-01-29 1986-08-07 Matsushita Electric Ind Co Ltd 焦点検出装置
JPS61206944A (ja) * 1985-03-11 1986-09-13 Hitachi Ltd 光磁気ディスク用の信号検出装置

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