JPS641904A - Apparatus for measuring shape distortion - Google Patents
Apparatus for measuring shape distortionInfo
- 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
Links
- 230000003287 optical effect Effects 0.000 abstract 1
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)
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)
| 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 |
-
1987
- 1987-06-24 JP JP15704487A patent/JPS641904A/ja active Pending
Cited By (2)
| 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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