JPH03128803U - - Google Patents
Info
- Publication number
- JPH03128803U JPH03128803U JP3808690U JP3808690U JPH03128803U JP H03128803 U JPH03128803 U JP H03128803U JP 3808690 U JP3808690 U JP 3808690U JP 3808690 U JP3808690 U JP 3808690U JP H03128803 U JPH03128803 U JP H03128803U
- Authority
- JP
- Japan
- Prior art keywords
- optical disk
- scale
- measuring device
- diffracted light
- guide groove
- 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 claims description 11
- 238000003384 imaging method Methods 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 1
Landscapes
- Length Measuring Devices By Optical Means (AREA)
- Manufacturing Optical Record Carriers (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3808690U JPH03128803U (th) | 1990-04-11 | 1990-04-11 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3808690U JPH03128803U (th) | 1990-04-11 | 1990-04-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03128803U true JPH03128803U (th) | 1991-12-25 |
Family
ID=31545779
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3808690U Pending JPH03128803U (th) | 1990-04-11 | 1990-04-11 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03128803U (th) |
-
1990
- 1990-04-11 JP JP3808690U patent/JPH03128803U/ja active Pending
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