JPS61236037A - 光ヘッドの焦点誤差検出装置 - Google Patents
光ヘッドの焦点誤差検出装置Info
- Publication number
- JPS61236037A JPS61236037A JP60075877A JP7587785A JPS61236037A JP S61236037 A JPS61236037 A JP S61236037A JP 60075877 A JP60075877 A JP 60075877A JP 7587785 A JP7587785 A JP 7587785A JP S61236037 A JPS61236037 A JP S61236037A
- Authority
- JP
- Japan
- Prior art keywords
- light
- thin film
- focus error
- optical waveguide
- diffraction grating
- 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 85
- 239000010409 thin film Substances 0.000 claims abstract description 54
- 238000001514 detection method Methods 0.000 claims abstract description 24
- 238000006243 chemical reaction Methods 0.000 claims abstract description 21
- 239000000758 substrate Substances 0.000 claims description 13
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 10
- 230000004907 flux Effects 0.000 description 8
- 239000004065 semiconductor Substances 0.000 description 6
- 201000009310 astigmatism Diseases 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910001218 Gallium arsenide Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000000609 electron-beam lithography Methods 0.000 description 1
- 230000001902 propagating effect Effects 0.000 description 1
Landscapes
- Automatic Focus Adjustment (AREA)
- Optical Recording Or Reproduction (AREA)
- Optical Head (AREA)
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60075877A JPS61236037A (ja) | 1985-04-10 | 1985-04-10 | 光ヘッドの焦点誤差検出装置 |
| DE19853536497 DE3536497A1 (de) | 1984-10-16 | 1985-10-12 | Vorrichtung zur erfassung von fokussierungsfehlern in einer kopfanordnung fuer optische scheiben |
| US06/787,782 US4672187A (en) | 1984-10-16 | 1985-10-15 | Focusing error detecting device in head assembly for optical disc |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60075877A JPS61236037A (ja) | 1985-04-10 | 1985-04-10 | 光ヘッドの焦点誤差検出装置 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61236037A true JPS61236037A (ja) | 1986-10-21 |
| JPH0453007B2 JPH0453007B2 (enrdf_load_stackoverflow) | 1992-08-25 |
Family
ID=13588945
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60075877A Granted JPS61236037A (ja) | 1984-10-16 | 1985-04-10 | 光ヘッドの焦点誤差検出装置 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61236037A (enrdf_load_stackoverflow) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02193334A (ja) * | 1989-01-20 | 1990-07-31 | Sanyo Electric Co Ltd | 光導波路装置 |
| US5159586A (en) * | 1985-05-24 | 1992-10-27 | Omron Tateisi Electronics Co. | Device for processing optical data |
| US5218584A (en) * | 1990-10-30 | 1993-06-08 | International Business Machines Corporation | Integrated optical head structure |
| KR20170034214A (ko) * | 2015-09-18 | 2017-03-28 | 삼성전자주식회사 | 광학 장치 |
| JP2021089307A (ja) * | 2019-12-02 | 2021-06-10 | 株式会社豊田中央研究所 | 投受光光学系、および光学装置 |
-
1985
- 1985-04-10 JP JP60075877A patent/JPS61236037A/ja active Granted
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5159586A (en) * | 1985-05-24 | 1992-10-27 | Omron Tateisi Electronics Co. | Device for processing optical data |
| JPH02193334A (ja) * | 1989-01-20 | 1990-07-31 | Sanyo Electric Co Ltd | 光導波路装置 |
| US5218584A (en) * | 1990-10-30 | 1993-06-08 | International Business Machines Corporation | Integrated optical head structure |
| KR20170034214A (ko) * | 2015-09-18 | 2017-03-28 | 삼성전자주식회사 | 광학 장치 |
| JP2021089307A (ja) * | 2019-12-02 | 2021-06-10 | 株式会社豊田中央研究所 | 投受光光学系、および光学装置 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0453007B2 (enrdf_load_stackoverflow) | 1992-08-25 |
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