JPS6484447A - Optical head device - Google Patents
Optical head deviceInfo
- Publication number
- JPS6484447A JPS6484447A JP62239040A JP23904087A JPS6484447A JP S6484447 A JPS6484447 A JP S6484447A JP 62239040 A JP62239040 A JP 62239040A JP 23904087 A JP23904087 A JP 23904087A JP S6484447 A JPS6484447 A JP S6484447A
- Authority
- JP
- Japan
- Prior art keywords
- light
- photoelectric converting
- spots
- light quantity
- irradiation
- 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
Landscapes
- Optical Head (AREA)
- Optical Recording Or Reproduction (AREA)
Abstract
PURPOSE:To constitute a transversal filter, and to perform the correction of a reproduced signal by providing a means to adjust the respective irradiation light quantity of plural light fluxes or the means to adjust the output of respective photoelectric converting means. CONSTITUTION:Emitted light from light sources 1,2,3 forms three irradiation spots 14,15,16 on a track 12 on a recording medium 11 by an optical system 8, and its reflected light is changed again in its direction by a beam splitter 7, and reforms an image on a photoelectric converting element 9, and the light of signal spots 17,18,19 is photoelectric-converted in a lump. Through this consti tution, one record pit comes to be read three times successively as being delayed by the irradiation spots 14,15,16 and the photoelectric converting element 9, and if the light quantity is made variable respectively and independently by light quantity setting circuits 4,5,6, output level is made variable, and the trans versal filter can be constituted.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62239040A JPH0778902B2 (en) | 1987-09-25 | 1987-09-25 | Optical head device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62239040A JPH0778902B2 (en) | 1987-09-25 | 1987-09-25 | Optical head device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6484447A true JPS6484447A (en) | 1989-03-29 |
JPH0778902B2 JPH0778902B2 (en) | 1995-08-23 |
Family
ID=17038984
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62239040A Expired - Fee Related JPH0778902B2 (en) | 1987-09-25 | 1987-09-25 | Optical head device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0778902B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0536083A (en) * | 1991-08-01 | 1993-02-12 | Sharp Corp | Optical recording and reproducing device |
-
1987
- 1987-09-25 JP JP62239040A patent/JPH0778902B2/en not_active Expired - Fee Related
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0536083A (en) * | 1991-08-01 | 1993-02-12 | Sharp Corp | Optical recording and reproducing device |
Also Published As
Publication number | Publication date |
---|---|
JPH0778902B2 (en) | 1995-08-23 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
LAPS | Cancellation because of no payment of annual fees |