JPS5724033A - Pickup device - Google Patents
Pickup deviceInfo
- Publication number
- JPS5724033A JPS5724033A JP9945780A JP9945780A JPS5724033A JP S5724033 A JPS5724033 A JP S5724033A JP 9945780 A JP9945780 A JP 9945780A JP 9945780 A JP9945780 A JP 9945780A JP S5724033 A JPS5724033 A JP S5724033A
- Authority
- JP
- Japan
- Prior art keywords
- lens
- prism
- turned
- pickup
- pickup 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.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
- G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Head (AREA)
Abstract
PURPOSE:To improve the symmetrical performance as well as the S/N with a light weight for a pickup, by using wollastone prism to an optical pickup device. CONSTITUTION:The light of a laser diode 8 is turned into parallel beams through a lens 7 and then condensed onto a recording carrier 2 by a lens 3 and through a wollastone prism 11 and a 1/4 wavelength plate 4. The reflected light goes back and turned in the prism 11 to be condensed to a photodetector 9 provided at a different place from the diode 8 via the lens 7. In such way, the symmetrical performance of a pickup can be enhanced with a reduced weight and an improved S/N.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9945780A JPS5724033A (en) | 1980-07-18 | 1980-07-18 | Pickup device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9945780A JPS5724033A (en) | 1980-07-18 | 1980-07-18 | Pickup device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5724033A true JPS5724033A (en) | 1982-02-08 |
Family
ID=14247841
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP9945780A Pending JPS5724033A (en) | 1980-07-18 | 1980-07-18 | Pickup device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5724033A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59104334U (en) * | 1982-12-28 | 1984-07-13 | パイオニア株式会社 | pick up device |
JPS6413236A (en) * | 1988-05-18 | 1989-01-18 | Sanyo Electric Co | Optical pickup |
US5172368A (en) * | 1989-04-25 | 1992-12-15 | Thomson-Csf | Reader for optical recording medium |
JPH06349104A (en) * | 1993-04-30 | 1994-12-22 | Samsung Electron Co Ltd | Optical pickup |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5476177A (en) * | 1977-11-30 | 1979-06-18 | Citizen Watch Co Ltd | Optical reader |
JPS5570944A (en) * | 1974-02-15 | 1980-05-28 | Philips Nv | Recorded carrier reading device |
-
1980
- 1980-07-18 JP JP9945780A patent/JPS5724033A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5570944A (en) * | 1974-02-15 | 1980-05-28 | Philips Nv | Recorded carrier reading device |
JPS5476177A (en) * | 1977-11-30 | 1979-06-18 | Citizen Watch Co Ltd | Optical reader |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59104334U (en) * | 1982-12-28 | 1984-07-13 | パイオニア株式会社 | pick up device |
JPS6341618Y2 (en) * | 1982-12-28 | 1988-11-01 | ||
JPS6413236A (en) * | 1988-05-18 | 1989-01-18 | Sanyo Electric Co | Optical pickup |
US5172368A (en) * | 1989-04-25 | 1992-12-15 | Thomson-Csf | Reader for optical recording medium |
JPH06349104A (en) * | 1993-04-30 | 1994-12-22 | Samsung Electron Co Ltd | Optical pickup |
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