JPH0543370Y2 - - Google Patents
Info
- Publication number
- JPH0543370Y2 JPH0543370Y2 JP4506787U JP4506787U JPH0543370Y2 JP H0543370 Y2 JPH0543370 Y2 JP H0543370Y2 JP 4506787 U JP4506787 U JP 4506787U JP 4506787 U JP4506787 U JP 4506787U JP H0543370 Y2 JPH0543370 Y2 JP H0543370Y2
- Authority
- JP
- Japan
- Prior art keywords
- optical disk
- circuit
- error signal
- focus error
- sample
- 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 - Lifetime
Links
- 230000003287 optical effect Effects 0.000 claims description 66
- 238000007689 inspection Methods 0.000 claims description 20
- 238000006073 displacement reaction Methods 0.000 claims description 11
- 230000001133 acceleration Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 238000005259 measurement Methods 0.000 description 3
- 230000002411 adverse Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
Landscapes
- Length Measuring Devices By Optical Means (AREA)
- Testing Of Optical Devices Or Fibers (AREA)
- Manufacturing Optical Record Carriers (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4506787U JPH0543370Y2 (en]) | 1987-03-27 | 1987-03-27 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4506787U JPH0543370Y2 (en]) | 1987-03-27 | 1987-03-27 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63153111U JPS63153111U (en]) | 1988-10-07 |
| JPH0543370Y2 true JPH0543370Y2 (en]) | 1993-11-01 |
Family
ID=30863469
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4506787U Expired - Lifetime JPH0543370Y2 (en]) | 1987-03-27 | 1987-03-27 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0543370Y2 (en]) |
-
1987
- 1987-03-27 JP JP4506787U patent/JPH0543370Y2/ja not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63153111U (en]) | 1988-10-07 |
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