JPS6218831U - - Google Patents

Info

Publication number
JPS6218831U
JPS6218831U JP11001985U JP11001985U JPS6218831U JP S6218831 U JPS6218831 U JP S6218831U JP 11001985 U JP11001985 U JP 11001985U JP 11001985 U JP11001985 U JP 11001985U JP S6218831 U JPS6218831 U JP S6218831U
Authority
JP
Japan
Prior art keywords
optical disk
groove
light source
pitch
measuring device
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
JP11001985U
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 JP11001985U priority Critical patent/JPS6218831U/ja
Publication of JPS6218831U publication Critical patent/JPS6218831U/ja
Pending legal-status Critical Current

Links

Landscapes

  • Optical Recording Or Reproduction (AREA)
  • Moving Of The Head For Recording And Reproducing By Optical Means (AREA)
  • Manufacturing Optical Record Carriers (AREA)
JP11001985U 1985-07-18 1985-07-18 Pending JPS6218831U (US07943777-20110517-C00090.png)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11001985U JPS6218831U (US07943777-20110517-C00090.png) 1985-07-18 1985-07-18

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11001985U JPS6218831U (US07943777-20110517-C00090.png) 1985-07-18 1985-07-18

Publications (1)

Publication Number Publication Date
JPS6218831U true JPS6218831U (US07943777-20110517-C00090.png) 1987-02-04

Family

ID=30988650

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11001985U Pending JPS6218831U (US07943777-20110517-C00090.png) 1985-07-18 1985-07-18

Country Status (1)

Country Link
JP (1) JPS6218831U (US07943777-20110517-C00090.png)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02247840A (ja) * 1989-03-20 1990-10-03 Nec Corp 光ディスク基板
JPH03198225A (ja) * 1989-12-26 1991-08-29 Sanyo Electric Co Ltd 光学式再生装置

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02247840A (ja) * 1989-03-20 1990-10-03 Nec Corp 光ディスク基板
JPH03198225A (ja) * 1989-12-26 1991-08-29 Sanyo Electric Co Ltd 光学式再生装置

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