JPS641904A - Apparatus for measuring shape distortion - Google Patents

Apparatus for measuring shape distortion

Info

Publication number
JPS641904A
JPS641904A JP15704487A JP15704487A JPS641904A JP S641904 A JPS641904 A JP S641904A JP 15704487 A JP15704487 A JP 15704487A JP 15704487 A JP15704487 A JP 15704487A JP S641904 A JPS641904 A JP S641904A
Authority
JP
Japan
Prior art keywords
detectors
error
drive units
error outputs
rotary angle
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
JP15704487A
Other languages
English (en)
Other versions
JPH011904A (ja
Inventor
Yutaka Uemura
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Columbia Co Ltd
Original Assignee
Nippon Columbia Co Ltd
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 Nippon Columbia Co Ltd filed Critical Nippon Columbia Co Ltd
Priority to JP15704487A priority Critical patent/JPS641904A/ja
Publication of JPH011904A publication Critical patent/JPH011904A/ja
Publication of JPS641904A publication Critical patent/JPS641904A/ja
Pending legal-status Critical Current

Links

Landscapes

  • Length Measuring Devices By Optical Means (AREA)
  • Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
  • Manufacturing Optical Record Carriers (AREA)
JP15704487A 1987-06-24 1987-06-24 Apparatus for measuring shape distortion Pending JPS641904A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15704487A JPS641904A (en) 1987-06-24 1987-06-24 Apparatus for measuring shape distortion

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15704487A JPS641904A (en) 1987-06-24 1987-06-24 Apparatus for measuring shape distortion

Publications (2)

Publication Number Publication Date
JPH011904A JPH011904A (ja) 1989-01-06
JPS641904A true JPS641904A (en) 1989-01-06

Family

ID=15640967

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15704487A Pending JPS641904A (en) 1987-06-24 1987-06-24 Apparatus for measuring shape distortion

Country Status (1)

Country Link
JP (1) JPS641904A (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005022526A1 (ja) * 2003-08-27 2005-03-10 Tdk Corporation 光記録媒体の反り角測定装置及び反り角測定方法

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005022526A1 (ja) * 2003-08-27 2005-03-10 Tdk Corporation 光記録媒体の反り角測定装置及び反り角測定方法
US7668056B2 (en) 2003-08-27 2010-02-23 Tdk Corporation Warpage angle measurement apparatus and warpage angle measurement method for optical recording medium

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