JPH01154513U - - Google Patents

Info

Publication number
JPH01154513U
JPH01154513U JP4918988U JP4918988U JPH01154513U JP H01154513 U JPH01154513 U JP H01154513U JP 4918988 U JP4918988 U JP 4918988U JP 4918988 U JP4918988 U JP 4918988U JP H01154513 U JPH01154513 U JP H01154513U
Authority
JP
Japan
Prior art keywords
wavelength
pregroove
optical disk
pits
optical
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
JP4918988U
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 JP4918988U priority Critical patent/JPH01154513U/ja
Publication of JPH01154513U publication Critical patent/JPH01154513U/ja
Pending legal-status Critical Current

Links

Landscapes

  • Optical Recording Or Reproduction (AREA)
  • Optical Head (AREA)
  • Optical Record Carriers And Manufacture Thereof (AREA)
JP4918988U 1988-04-12 1988-04-12 Pending JPH01154513U (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4918988U JPH01154513U (fr) 1988-04-12 1988-04-12

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4918988U JPH01154513U (fr) 1988-04-12 1988-04-12

Publications (1)

Publication Number Publication Date
JPH01154513U true JPH01154513U (fr) 1989-10-24

Family

ID=31275305

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4918988U Pending JPH01154513U (fr) 1988-04-12 1988-04-12

Country Status (1)

Country Link
JP (1) JPH01154513U (fr)

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