JPS61233434A - 光ヘッド - Google Patents
光ヘッドInfo
- Publication number
- JPS61233434A JPS61233434A JP7405385A JP7405385A JPS61233434A JP S61233434 A JPS61233434 A JP S61233434A JP 7405385 A JP7405385 A JP 7405385A JP 7405385 A JP7405385 A JP 7405385A JP S61233434 A JPS61233434 A JP S61233434A
- Authority
- JP
- Japan
- Prior art keywords
- light beam
- photodetector
- optical disk
- cylindrical lens
- optical
- 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.)
- Granted
Links
- 230000003287 optical effect Effects 0.000 title claims abstract description 94
- 238000001514 detection method Methods 0.000 abstract description 14
- 239000003518 caustics Substances 0.000 abstract 2
- 238000010586 diagram Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 201000009310 astigmatism Diseases 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000002050 diffraction method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 210000000936 intestine Anatomy 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Landscapes
- Automatic Focus Adjustment (AREA)
- Optical Recording Or Reproduction (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7405385A JPS61233434A (ja) | 1985-04-08 | 1985-04-08 | 光ヘッド |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7405385A JPS61233434A (ja) | 1985-04-08 | 1985-04-08 | 光ヘッド |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61233434A true JPS61233434A (ja) | 1986-10-17 |
| JPH0467695B2 JPH0467695B2 (de) | 1992-10-29 |
Family
ID=13536059
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7405385A Granted JPS61233434A (ja) | 1985-04-08 | 1985-04-08 | 光ヘッド |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61233434A (de) |
-
1985
- 1985-04-08 JP JP7405385A patent/JPS61233434A/ja active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0467695B2 (de) | 1992-10-29 |
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