JPS6462838A - Optical pick-up - Google Patents
Optical pick-upInfo
- Publication number
- JPS6462838A JPS6462838A JP62219712A JP21971287A JPS6462838A JP S6462838 A JPS6462838 A JP S6462838A JP 62219712 A JP62219712 A JP 62219712A JP 21971287 A JP21971287 A JP 21971287A JP S6462838 A JPS6462838 A JP S6462838A
- Authority
- JP
- Japan
- Prior art keywords
- converging means
- relative position
- converging
- hologram element
- dislocation
- 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)
Abstract
PURPOSE:To prevent the generation of the dislocation of tracking by providing a converging means and a hologram element while a constant relative position is held. CONSTITUTION:A converging means 13 and a hologram element 12 are provided while a constant relative position is held. At the time of a tracking action, the converging means 13 and the hologram element 12 are simultaneously moved to this. Consequently, the relative misregistration of the reflecting light beam made incident on through the converging means hardly occurs. Thus, a satisfactory servo signal recording information signal can be obtained. For example, even when the converging means is moved so as to follow a converging spot, the dislocation of the relative position of the converging means and the hologram does not occur.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62219712A JP2675555B2 (en) | 1987-09-02 | 1987-09-02 | Optical pickup |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62219712A JP2675555B2 (en) | 1987-09-02 | 1987-09-02 | Optical pickup |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6462838A true JPS6462838A (en) | 1989-03-09 |
JP2675555B2 JP2675555B2 (en) | 1997-11-12 |
Family
ID=16739785
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62219712A Expired - Lifetime JP2675555B2 (en) | 1987-09-02 | 1987-09-02 | Optical pickup |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2675555B2 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0346121A2 (en) * | 1988-06-09 | 1989-12-13 | Matsushita Electric Industrial Co., Ltd. | Optical pickup head having a hologram-associated objective lens and optical information processing apparatus using the same |
JPH07169069A (en) * | 1994-08-05 | 1995-07-04 | Matsushita Electric Ind Co Ltd | Optical head device and optical information apparatus |
US5648951A (en) * | 1990-04-12 | 1997-07-15 | Matsushita Electic Industrial Co. Ltd. | Movable optical head integrally incorporated with objective lens and hologram element |
US7742384B2 (en) | 2006-10-25 | 2010-06-22 | Panasonic Corporation | Optical head and optical disc device |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61195534U (en) * | 1985-05-29 | 1986-12-05 | ||
JPS62103857A (en) * | 1985-10-31 | 1987-05-14 | Mitsubishi Electric Corp | Optical pickup device |
-
1987
- 1987-09-02 JP JP62219712A patent/JP2675555B2/en not_active Expired - Lifetime
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61195534U (en) * | 1985-05-29 | 1986-12-05 | ||
JPS62103857A (en) * | 1985-10-31 | 1987-05-14 | Mitsubishi Electric Corp | Optical pickup device |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0346121A2 (en) * | 1988-06-09 | 1989-12-13 | Matsushita Electric Industrial Co., Ltd. | Optical pickup head having a hologram-associated objective lens and optical information processing apparatus using the same |
EP0346121A3 (en) * | 1988-06-09 | 1991-05-08 | Matsushita Electric Industrial Co., Ltd. | Optical pickup head having a hologram-associated objective lens and optical information processing apparatus using the same |
US5111448A (en) * | 1988-06-09 | 1992-05-05 | Matsushita Electric Industrial Co., Ltd. | Optical pickup head having a hologram-associated objective lens and optical information processing apparatus using the same |
US5648951A (en) * | 1990-04-12 | 1997-07-15 | Matsushita Electic Industrial Co. Ltd. | Movable optical head integrally incorporated with objective lens and hologram element |
JPH07169069A (en) * | 1994-08-05 | 1995-07-04 | Matsushita Electric Ind Co Ltd | Optical head device and optical information apparatus |
US7742384B2 (en) | 2006-10-25 | 2010-06-22 | Panasonic Corporation | Optical head and optical disc device |
Also Published As
Publication number | Publication date |
---|---|
JP2675555B2 (en) | 1997-11-12 |
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Legal Events
Date | Code | Title | Description |
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FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20070718 Year of fee payment: 10 |
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FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080718 Year of fee payment: 11 |
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EXPY | Cancellation because of completion of term | ||
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080718 Year of fee payment: 11 |