JPS54102106A - Record reproducer - Google Patents
Record reproducerInfo
- Publication number
- JPS54102106A JPS54102106A JP873478A JP873478A JPS54102106A JP S54102106 A JPS54102106 A JP S54102106A JP 873478 A JP873478 A JP 873478A JP 873478 A JP873478 A JP 873478A JP S54102106 A JPS54102106 A JP S54102106A
- Authority
- JP
- Japan
- Prior art keywords
- light
- interference fringes
- displacement quantity
- record
- reproduction
- 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
Landscapes
- Optical Recording Or Reproduction (AREA)
Abstract
PURPOSE: To make possible reproduction of high fidelity which has no relation to the intensities of reflected light by detecting the displacement quantity of the interference fringes obtained as the reflected light from the modulated groove walls of record and part of laser light interfere thereby obtaining reproduction signal.
CONSTITUTION: Laser light 3 is divided to reference light and radiation light 5. The radiation light 5 is radiated to the wall surface 1a on one side of the modulated grooves 1 of a record and the reflected light thereof is entered to a CCD image sensor 13 being a photoelectric transducer. The reference light 4 is also entered to another image sensor 14 and both are superposed to form interference fringes. Next, the functions (n), (h) which represent the displacement quantity of said interference fringes are detected from the sensors 13, 14 respectively and are added via counters 15, 16 to constitute the reproducer so that the electric signal proportional to the displacement quantity of the wall surface 1a of the modulated grooves 1 is thereby obtained. This enables the noise occuring in the intensity change and reflectance change of the light source to be eliminated and the reproduction of high fidelity to be obtained.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP873478A JPS54102106A (en) | 1978-01-27 | 1978-01-27 | Record reproducer |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP873478A JPS54102106A (en) | 1978-01-27 | 1978-01-27 | Record reproducer |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS54102106A true JPS54102106A (en) | 1979-08-11 |
Family
ID=11701173
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP873478A Pending JPS54102106A (en) | 1978-01-27 | 1978-01-27 | Record reproducer |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54102106A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6139946A (en) * | 1984-07-31 | 1986-02-26 | Oki Electric Ind Co Ltd | Method and apparatus for reproducing optical memory |
US4870631A (en) * | 1986-05-30 | 1989-09-26 | Finial Technology, Inc. | Optical turntable system with reflected spot position detection |
US4972344A (en) * | 1986-05-30 | 1990-11-20 | Finial Technology, Inc. | Dual beam optical turntable |
-
1978
- 1978-01-27 JP JP873478A patent/JPS54102106A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6139946A (en) * | 1984-07-31 | 1986-02-26 | Oki Electric Ind Co Ltd | Method and apparatus for reproducing optical memory |
US4870631A (en) * | 1986-05-30 | 1989-09-26 | Finial Technology, Inc. | Optical turntable system with reflected spot position detection |
US4972344A (en) * | 1986-05-30 | 1990-11-20 | Finial Technology, Inc. | Dual beam optical turntable |
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