JPS627619U - - Google Patents

Info

Publication number
JPS627619U
JPS627619U JP9697885U JP9697885U JPS627619U JP S627619 U JPS627619 U JP S627619U JP 9697885 U JP9697885 U JP 9697885U JP 9697885 U JP9697885 U JP 9697885U JP S627619 U JPS627619 U JP S627619U
Authority
JP
Japan
Prior art keywords
focus error
error detection
light receiving
detection circuit
difference
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
JP9697885U
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 JP9697885U priority Critical patent/JPS627619U/ja
Publication of JPS627619U publication Critical patent/JPS627619U/ja
Pending legal-status Critical Current

Links

Landscapes

  • Optical Recording Or Reproduction (AREA)
JP9697885U 1985-06-26 1985-06-26 Pending JPS627619U (enrdf_load_stackoverflow)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9697885U JPS627619U (enrdf_load_stackoverflow) 1985-06-26 1985-06-26

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9697885U JPS627619U (enrdf_load_stackoverflow) 1985-06-26 1985-06-26

Publications (1)

Publication Number Publication Date
JPS627619U true JPS627619U (enrdf_load_stackoverflow) 1987-01-17

Family

ID=30963394

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9697885U Pending JPS627619U (enrdf_load_stackoverflow) 1985-06-26 1985-06-26

Country Status (1)

Country Link
JP (1) JPS627619U (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63261540A (ja) * 1987-04-17 1988-10-28 Brother Ind Ltd トラツキングエラ−信号検出装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63261540A (ja) * 1987-04-17 1988-10-28 Brother Ind Ltd トラツキングエラ−信号検出装置

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