JPH0568774B2 - - Google Patents
Info
- Publication number
- JPH0568774B2 JPH0568774B2 JP61178513A JP17851386A JPH0568774B2 JP H0568774 B2 JPH0568774 B2 JP H0568774B2 JP 61178513 A JP61178513 A JP 61178513A JP 17851386 A JP17851386 A JP 17851386A JP H0568774 B2 JPH0568774 B2 JP H0568774B2
- Authority
- JP
- Japan
- Prior art keywords
- objective lens
- photodetector
- optical information
- light
- detection device
- 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 - Lifetime
Links
- 238000001514 detection method Methods 0.000 claims description 24
- 230000003287 optical effect Effects 0.000 claims description 23
- 230000004075 alteration Effects 0.000 claims description 14
- 230000000694 effects Effects 0.000 claims description 2
- 230000002411 adverse Effects 0.000 claims 1
- 230000004907 flux Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 8
- 239000000758 substrate Substances 0.000 description 7
- 239000004065 semiconductor Substances 0.000 description 3
- 229910000808 amorphous metal alloy Inorganic materials 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910052761 rare earth metal Inorganic materials 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000004544 sputter deposition Methods 0.000 description 2
- 239000010409 thin film Substances 0.000 description 2
- 229910052723 transition metal Inorganic materials 0.000 description 2
- 150000003624 transition metals Chemical class 0.000 description 2
- 238000007740 vapor deposition Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 201000009310 astigmatism Diseases 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 229910052706 scandium Inorganic materials 0.000 description 1
Landscapes
- Automatic Focus Adjustment (AREA)
- Optical Recording Or Reproduction (AREA)
- Optical Head (AREA)
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61178513A JPS6334745A (ja) | 1986-07-28 | 1986-07-28 | 光情報検出装置 |
| CA000542944A CA1319194C (en) | 1986-07-28 | 1987-07-24 | Focusing error detector and optical data detecting device incorporating the focusing error detector |
| EP87306575A EP0255305B1 (en) | 1986-07-28 | 1987-07-24 | Focusing error detecting device and method of manufacturing the same |
| US07/078,773 US4812638A (en) | 1986-07-28 | 1987-07-28 | Focusing error detector and optical data detecting device incorporating the focusing error detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61178513A JPS6334745A (ja) | 1986-07-28 | 1986-07-28 | 光情報検出装置 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6334745A JPS6334745A (ja) | 1988-02-15 |
| JPH0568774B2 true JPH0568774B2 (zh) | 1993-09-29 |
Family
ID=16049786
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61178513A Granted JPS6334745A (ja) | 1986-07-28 | 1986-07-28 | 光情報検出装置 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6334745A (zh) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0645903B2 (ja) * | 1989-12-06 | 1994-06-15 | 新日本製鐵株式会社 | プリント基板用の鋼板 |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60167131A (ja) * | 1984-02-09 | 1985-08-30 | Mitsubishi Electric Corp | 光学式情報記録再生装置の光学機構 |
-
1986
- 1986-07-28 JP JP61178513A patent/JPS6334745A/ja active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60167131A (ja) * | 1984-02-09 | 1985-08-30 | Mitsubishi Electric Corp | 光学式情報記録再生装置の光学機構 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6334745A (ja) | 1988-02-15 |
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