JPH0621108Y2 - 光ディスクおよび読取装置 - Google Patents

光ディスクおよび読取装置

Info

Publication number
JPH0621108Y2
JPH0621108Y2 JP1990029219U JP2921990U JPH0621108Y2 JP H0621108 Y2 JPH0621108 Y2 JP H0621108Y2 JP 1990029219 U JP1990029219 U JP 1990029219U JP 2921990 U JP2921990 U JP 2921990U JP H0621108 Y2 JPH0621108 Y2 JP H0621108Y2
Authority
JP
Japan
Prior art keywords
disc
signal
diffraction grating
optical disk
pattern
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.)
Expired - Fee Related
Application number
JP1990029219U
Other languages
English (en)
Japanese (ja)
Other versions
JPH0416684U (en]
Inventor
武雄 市川
Original Assignee
日本コロムビア株式会社
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 日本コロムビア株式会社 filed Critical 日本コロムビア株式会社
Priority to JP1990029219U priority Critical patent/JPH0621108Y2/ja
Publication of JPH0416684U publication Critical patent/JPH0416684U/ja
Application granted granted Critical
Publication of JPH0621108Y2 publication Critical patent/JPH0621108Y2/ja
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Landscapes

  • Optical Record Carriers And Manufacture Thereof (AREA)
  • Optical Recording Or Reproduction (AREA)
JP1990029219U 1990-03-22 1990-03-22 光ディスクおよび読取装置 Expired - Fee Related JPH0621108Y2 (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1990029219U JPH0621108Y2 (ja) 1990-03-22 1990-03-22 光ディスクおよび読取装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1990029219U JPH0621108Y2 (ja) 1990-03-22 1990-03-22 光ディスクおよび読取装置

Publications (2)

Publication Number Publication Date
JPH0416684U JPH0416684U (en]) 1992-02-12
JPH0621108Y2 true JPH0621108Y2 (ja) 1994-06-01

Family

ID=31531991

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1990029219U Expired - Fee Related JPH0621108Y2 (ja) 1990-03-22 1990-03-22 光ディスクおよび読取装置

Country Status (1)

Country Link
JP (1) JPH0621108Y2 (en])

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3175326B2 (ja) * 1992-08-28 2001-06-11 凸版印刷株式会社 光情報記録媒体およびその情報読取り方法

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4292511A (en) * 1980-04-21 1981-09-29 Rca Corporation Apparatus and method for reading an identifying label on an information record
JPS57103109A (en) * 1980-12-19 1982-06-26 Pioneer Video Corp Centering device for recording track of recording disk
JPS63161427U (en]) * 1987-04-10 1988-10-21

Also Published As

Publication number Publication date
JPH0416684U (en]) 1992-02-12

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