JPH0512770B2 - - Google Patents
Info
- Publication number
- JPH0512770B2 JPH0512770B2 JP16307186A JP16307186A JPH0512770B2 JP H0512770 B2 JPH0512770 B2 JP H0512770B2 JP 16307186 A JP16307186 A JP 16307186A JP 16307186 A JP16307186 A JP 16307186A JP H0512770 B2 JPH0512770 B2 JP H0512770B2
- Authority
- JP
- Japan
- Prior art keywords
- light
- light beam
- head device
- diffraction grating
- diffraction
- 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
- 230000003287 optical effect Effects 0.000 claims description 53
- 238000000926 separation method Methods 0.000 claims description 10
- 238000001514 detection method Methods 0.000 description 16
- 238000010586 diagram Methods 0.000 description 7
- 230000004075 alteration Effects 0.000 description 6
- 201000009310 astigmatism Diseases 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 230000004907 flux Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 2
- 206010010071 Coma Diseases 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
Landscapes
- Optical Recording Or Reproduction (AREA)
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP61163071A JPS6320727A (ja) | 1986-07-11 | 1986-07-11 | 光学式ヘツド装置 |
KR1019870006080A KR900008380B1 (ko) | 1986-07-01 | 1987-06-16 | 광학식 헤드장치 |
US07/066,009 US4817072A (en) | 1986-07-01 | 1987-06-24 | Optical head utilizing diffraction grating |
FR878709137A FR2601174B1 (fr) | 1986-07-01 | 1987-06-29 | Dispositif formant tete de type optique, notamment pour l'enregistrement et la lecture de donnees. |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP61163071A JPS6320727A (ja) | 1986-07-11 | 1986-07-11 | 光学式ヘツド装置 |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6320727A JPS6320727A (ja) | 1988-01-28 |
JPH0512770B2 true JPH0512770B2 (de) | 1993-02-18 |
Family
ID=15766627
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP61163071A Granted JPS6320727A (ja) | 1986-07-01 | 1986-07-11 | 光学式ヘツド装置 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6320727A (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5233444A (en) * | 1989-07-25 | 1993-08-03 | Olympus Optical Co., Ltd. | Focus error detecting apparatus |
JP4683704B2 (ja) | 2000-10-23 | 2011-05-18 | 東芝エレベータ株式会社 | 乗客コンベア装置 |
-
1986
- 1986-07-11 JP JP61163071A patent/JPS6320727A/ja active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS6320727A (ja) | 1988-01-28 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
EXPY | Cancellation because of completion of term |