JPS5470003A - Optical information reader - Google Patents
Optical information readerInfo
- Publication number
- JPS5470003A JPS5470003A JP13697377A JP13697377A JPS5470003A JP S5470003 A JPS5470003 A JP S5470003A JP 13697377 A JP13697377 A JP 13697377A JP 13697377 A JP13697377 A JP 13697377A JP S5470003 A JPS5470003 A JP S5470003A
- Authority
- JP
- Japan
- Prior art keywords
- disc
- optical fibers
- optical
- focusing
- disposed
- 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 achieve the miniaturization of pickup head part and simplification of focusing means by using optical fibers for transmission and reception of signal light and integrally providing focusing optical fibers.
CONSTITUTION: A read light source, a beam splitter and photo detector are disposed in the position away from a disc 1. A signal light transmitting-receiving optical fiber 61 as a pickup head part is disposed between these and the disc 1. In adjacent to this, forcusing optical fibers 64, 65 whose end parts are so tilted as to view the focusing point of the read light beam are disposed. The disc 1 side thereof is held by holders 101, 102 to be made elevatable. This causes the reflected light beam having been modulated with the read light beam and disc 1 to be transmitted through the optical fibre 61. In addition, the output light detected in the optical 61 and the output light detected in the optical fiber 61 and the output light detected in the optical fibers 64, 65 are compared and the holders 101, 102 are so vertically moved as to balance both, whereby focusing controlling is accomplished.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13697377A JPS5470003A (en) | 1977-11-15 | 1977-11-15 | Optical information reader |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13697377A JPS5470003A (en) | 1977-11-15 | 1977-11-15 | Optical information reader |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5470003A true JPS5470003A (en) | 1979-06-05 |
Family
ID=15187790
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13697377A Pending JPS5470003A (en) | 1977-11-15 | 1977-11-15 | Optical information reader |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5470003A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0039836A2 (en) * | 1980-05-12 | 1981-11-18 | Northern Telecom Limited | A scanning head for an optical disc system |
JPH07302449A (en) * | 1988-04-06 | 1995-11-14 | Mitsubishi Electric Corp | Optical disk recording and reproducing device |
-
1977
- 1977-11-15 JP JP13697377A patent/JPS5470003A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0039836A2 (en) * | 1980-05-12 | 1981-11-18 | Northern Telecom Limited | A scanning head for an optical disc system |
EP0039836A3 (en) * | 1980-05-12 | 1982-05-19 | Northern Telecom Limited | A scanning head for an optical disc system |
JPH07302449A (en) * | 1988-04-06 | 1995-11-14 | Mitsubishi Electric Corp | Optical disk recording and reproducing device |
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