JPS637950Y2 - - Google Patents
Info
- Publication number
- JPS637950Y2 JPS637950Y2 JP3440782U JP3440782U JPS637950Y2 JP S637950 Y2 JPS637950 Y2 JP S637950Y2 JP 3440782 U JP3440782 U JP 3440782U JP 3440782 U JP3440782 U JP 3440782U JP S637950 Y2 JPS637950 Y2 JP S637950Y2
- Authority
- JP
- Japan
- Prior art keywords
- light
- reflected light
- defocus
- irradiated object
- lens system
- 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
- 238000001514 detection method Methods 0.000 claims description 14
- 230000003287 optical effect Effects 0.000 claims description 14
- 238000000034 method Methods 0.000 description 11
- 239000004065 semiconductor Substances 0.000 description 5
- 238000005253 cladding Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000035945 sensitivity Effects 0.000 description 4
- 239000013307 optical fiber Substances 0.000 description 3
- 201000009310 astigmatism Diseases 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000010287 polarization Effects 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 230000015654 memory Effects 0.000 description 1
- 230000002250 progressing effect Effects 0.000 description 1
Landscapes
- Optical Recording Or Reproduction (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3440782U JPS58140522U (ja) | 1982-03-11 | 1982-03-11 | 焦点ずれ検出装置 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3440782U JPS58140522U (ja) | 1982-03-11 | 1982-03-11 | 焦点ずれ検出装置 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58140522U JPS58140522U (ja) | 1983-09-21 |
| JPS637950Y2 true JPS637950Y2 (US07179912-20070220-C00144.png) | 1988-03-09 |
Family
ID=30045890
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3440782U Granted JPS58140522U (ja) | 1982-03-11 | 1982-03-11 | 焦点ずれ検出装置 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58140522U (US07179912-20070220-C00144.png) |
-
1982
- 1982-03-11 JP JP3440782U patent/JPS58140522U/ja active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58140522U (ja) | 1983-09-21 |
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