JPH0467695B2 - - Google Patents
Info
- Publication number
- JPH0467695B2 JPH0467695B2 JP7405385A JP7405385A JPH0467695B2 JP H0467695 B2 JPH0467695 B2 JP H0467695B2 JP 7405385 A JP7405385 A JP 7405385A JP 7405385 A JP7405385 A JP 7405385A JP H0467695 B2 JPH0467695 B2 JP H0467695B2
- Authority
- JP
- Japan
- Prior art keywords
- light beam
- optical disk
- photodetector
- light
- cylindrical lens
- 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 89
- 238000001514 detection method Methods 0.000 description 19
- 238000010586 diagram Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000000470 constituent Substances 0.000 description 2
- 238000003384 imaging method Methods 0.000 description 2
- 201000009310 astigmatism Diseases 0.000 description 1
- 238000002050 diffraction method Methods 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 JPS61233434A (ja) | 1986-10-17 |
| JPH0467695B2 true JPH0467695B2 (fr) | 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 (fr) |
-
1985
- 1985-04-08 JP JP7405385A patent/JPS61233434A/ja active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61233434A (ja) | 1986-10-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR880000362B1 (ko) | 광학식 정보 재생 장치에 있어서 신호 검출 방식 | |
| JP2725632B2 (ja) | 光ヘッド装置 | |
| KR100691661B1 (ko) | 광 헤드, 수발광 소자 및 광 기록 매체 기록 재생 장치 | |
| JPS59231736A (ja) | フォーカスおよびトラッキング誤差検出装置 | |
| JP2672618B2 (ja) | 光情報記録再生装置 | |
| JPH0467695B2 (fr) | ||
| JP3044667B2 (ja) | 光学式読取り装置 | |
| JPH1040559A (ja) | コンパチブル記録又は再生装置 | |
| JPS62298029A (ja) | スポツト位置エラ−検出系 | |
| JPS6265242A (ja) | 光ヘツド | |
| JP2768985B2 (ja) | 光学式情報記録再生装置 | |
| JPS63266637A (ja) | 光ヘツド | |
| JPS6093647A (ja) | 光学式デイスクプレ−ヤの再生用光学系制御機構 | |
| JP2825552B2 (ja) | 光学式情報記録再生装置 | |
| JPH02187929A (ja) | 光学ヘッド | |
| JP2795233B2 (ja) | 光ヘッド装置 | |
| JP2946998B2 (ja) | 光ヘッド装置 | |
| JPS637949Y2 (fr) | ||
| JP2737194B2 (ja) | 光記録媒体の信号検出方法 | |
| JPH0227736B2 (fr) | ||
| JPH0778877B2 (ja) | 光ディスク装置 | |
| JPH04324130A (ja) | 光ディスク装置 | |
| JPS61113139A (ja) | 光学情報記録再生装置 | |
| JPS6066336A (ja) | 光情報検出装置 | |
| JPS6223373B2 (fr) |