JPS647334A - Focus controller - Google Patents
Focus controllerInfo
- Publication number
- JPS647334A JPS647334A JP16289687A JP16289687A JPS647334A JP S647334 A JPS647334 A JP S647334A JP 16289687 A JP16289687 A JP 16289687A JP 16289687 A JP16289687 A JP 16289687A JP S647334 A JPS647334 A JP S647334A
- Authority
- JP
- Japan
- Prior art keywords
- focus
- lens
- lenses
- optical axis
- reflected
- 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 abstract 4
- 201000009310 astigmatism Diseases 0.000 abstract 2
- 238000001514 detection method Methods 0.000 abstract 2
- 230000004907 flux Effects 0.000 abstract 1
Landscapes
- Automatic Focus Adjustment (AREA)
- Optical Recording Or Reproduction (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16289687A JPS647334A (en) | 1987-06-30 | 1987-06-30 | Focus controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16289687A JPS647334A (en) | 1987-06-30 | 1987-06-30 | Focus controller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS647334A true JPS647334A (en) | 1989-01-11 |
Family
ID=15763298
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16289687A Pending JPS647334A (en) | 1987-06-30 | 1987-06-30 | Focus controller |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS647334A (ja) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5153864A (en) * | 1989-03-31 | 1992-10-06 | Kabushiki Kaisha Toshiba | Focusing detection optical path for an optical information processing system |
-
1987
- 1987-06-30 JP JP16289687A patent/JPS647334A/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5153864A (en) * | 1989-03-31 | 1992-10-06 | Kabushiki Kaisha Toshiba | Focusing detection optical path for an optical information processing system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS5753832A (en) | Method and device for recording of optical information | |
| HK101196A (en) | Focus sensing apparatus and method | |
| JPS5752005A (en) | Focus detecting method | |
| JPS57179954A (en) | Optical type disc player | |
| JPS6455746A (en) | Optical pickup device | |
| JPS647334A (en) | Focus controller | |
| EP0390116A3 (en) | Optical information processing system | |
| JPS55125417A (en) | Photodetector | |
| JPS6486337A (en) | Hologram | |
| JPH0478029A (ja) | 光学的情報記録再生装置 | |
| JPS5746334A (en) | Optical information reproducer | |
| JPS57200912A (en) | Information recording system | |
| JPS647331A (en) | Focus controller | |
| JPS647333A (en) | Focus controller | |
| JPS647330A (en) | Focus controller | |
| JPS647337A (en) | Focus controller | |
| JPS647335A (en) | Focus controller | |
| JPS647332A (en) | Focus controller | |
| JPS647338A (en) | Focus controller | |
| JPS6488931A (en) | Servo optical pick-up device | |
| JPS647336A (en) | Focus controller | |
| JPH0219537B2 (ja) | ||
| JPS6413246A (en) | Optical head for magneto-optical storage | |
| JPS6489043A (en) | Focus controller | |
| JPS6489041A (en) | Focus controller |