JPH048327Y2 - - Google Patents
Info
- Publication number
- JPH048327Y2 JPH048327Y2 JP4671785U JP4671785U JPH048327Y2 JP H048327 Y2 JPH048327 Y2 JP H048327Y2 JP 4671785 U JP4671785 U JP 4671785U JP 4671785 U JP4671785 U JP 4671785U JP H048327 Y2 JPH048327 Y2 JP H048327Y2
- Authority
- JP
- Japan
- Prior art keywords
- disk
- amount
- automatic control
- runout
- optical head
- 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
Links
- 230000003287 optical effect Effects 0.000 claims description 32
- 238000006073 displacement reaction Methods 0.000 claims description 23
- 238000012544 monitoring process Methods 0.000 claims description 3
- 230000001678 irradiating effect Effects 0.000 claims 1
- 238000005259 measurement Methods 0.000 description 10
- 238000001514 detection method Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 8
- 230000007423 decrease Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 201000009310 astigmatism Diseases 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000011410 subtraction method Methods 0.000 description 1
Landscapes
- Length Measuring Devices By Optical Means (AREA)
- Optical Recording Or Reproduction (AREA)
- Manufacturing Optical Record Carriers (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4671785U JPH048327Y2 (en]) | 1985-03-29 | 1985-03-29 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4671785U JPH048327Y2 (en]) | 1985-03-29 | 1985-03-29 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61161703U JPS61161703U (en]) | 1986-10-07 |
| JPH048327Y2 true JPH048327Y2 (en]) | 1992-03-03 |
Family
ID=30561379
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4671785U Expired JPH048327Y2 (en]) | 1985-03-29 | 1985-03-29 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH048327Y2 (en]) |
-
1985
- 1985-03-29 JP JP4671785U patent/JPH048327Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61161703U (en]) | 1986-10-07 |
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