JPH02109240U - - Google Patents

Info

Publication number
JPH02109240U
JPH02109240U JP1817189U JP1817189U JPH02109240U JP H02109240 U JPH02109240 U JP H02109240U JP 1817189 U JP1817189 U JP 1817189U JP 1817189 U JP1817189 U JP 1817189U JP H02109240 U JPH02109240 U JP H02109240U
Authority
JP
Japan
Prior art keywords
disk
focus
back surface
light beam
determining means
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.)
Granted
Application number
JP1817189U
Other languages
English (en)
Japanese (ja)
Other versions
JPH0725682Y2 (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 JP1817189U priority Critical patent/JPH0725682Y2/ja
Publication of JPH02109240U publication Critical patent/JPH02109240U/ja
Application granted granted Critical
Publication of JPH0725682Y2 publication Critical patent/JPH0725682Y2/ja
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Manufacturing Optical Record Carriers (AREA)
  • Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
  • Optical Recording Or Reproduction (AREA)
JP1817189U 1989-02-18 1989-02-18 ディスク検査装置 Expired - Lifetime JPH0725682Y2 (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1817189U JPH0725682Y2 (ja) 1989-02-18 1989-02-18 ディスク検査装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1817189U JPH0725682Y2 (ja) 1989-02-18 1989-02-18 ディスク検査装置

Publications (2)

Publication Number Publication Date
JPH02109240U true JPH02109240U (cs) 1990-08-31
JPH0725682Y2 JPH0725682Y2 (ja) 1995-06-07

Family

ID=31232576

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1817189U Expired - Lifetime JPH0725682Y2 (ja) 1989-02-18 1989-02-18 ディスク検査装置

Country Status (1)

Country Link
JP (1) JPH0725682Y2 (cs)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009063604A1 (ja) * 2007-11-12 2009-05-22 Panasonic Corporation 光ディスク装置
JP2014126436A (ja) * 2012-12-26 2014-07-07 Toray Eng Co Ltd 積層構造を有するワークの内部検査装置

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009063604A1 (ja) * 2007-11-12 2009-05-22 Panasonic Corporation 光ディスク装置
US8174943B2 (en) 2007-11-12 2012-05-08 Panasonic Corporation Optical disk device
JP5406033B2 (ja) * 2007-11-12 2014-02-05 パナソニック株式会社 光ディスク装置
JP2014126436A (ja) * 2012-12-26 2014-07-07 Toray Eng Co Ltd 積層構造を有するワークの内部検査装置

Also Published As

Publication number Publication date
JPH0725682Y2 (ja) 1995-06-07

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