JPS5619176A - Optical information reader - Google Patents
Optical information readerInfo
- Publication number
- JPS5619176A JPS5619176A JP9627379A JP9627379A JPS5619176A JP S5619176 A JPS5619176 A JP S5619176A JP 9627379 A JP9627379 A JP 9627379A JP 9627379 A JP9627379 A JP 9627379A JP S5619176 A JPS5619176 A JP S5619176A
- Authority
- JP
- Japan
- Prior art keywords
- polarization
- read
- reflected
- polarized
- splitter
- 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
Abstract
PURPOSE: To enable the read-in of high sensitivity with low output laser, by enabling the read-in of stright line polarization and realizing the input and refrected light separation, in the optical information reader using semiconductor laser.
CONSTITUTION: The output beam from the semiconductor laser 1 is made parallel at the lens 3 and it is fed to the Farady element 10 through the polarization splitter 8. Further, the beam polarized by 45° at the element 10 is fed to the information recording carrier 15 and further reflected with fine rotation toward polarization corresponding to the recorded information. This reflected light is again subject to the 45° polarized rotation at the element 10, and is advances toward the polarization orthogonal to the polarization of laser radiated light and fully reflected at the splitter 8. After the polarization characteristics of the reflected beam is differentially detected at the polarized beam splitter 11, it is differentially amplified 14 via the photo detectors 12, 13. Thus, the change in fine rotation toward polarization of readout beam is read in as the information of the carrier 15 and the incoming and reflection split is realized, allowing to perform the read-in of high sensitivity with low output laser.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9627379A JPS5619176A (en) | 1979-07-25 | 1979-07-25 | Optical information reader |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9627379A JPS5619176A (en) | 1979-07-25 | 1979-07-25 | Optical information reader |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5619176A true JPS5619176A (en) | 1981-02-23 |
JPS6215936B2 JPS6215936B2 (en) | 1987-04-09 |
Family
ID=14160528
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP9627379A Granted JPS5619176A (en) | 1979-07-25 | 1979-07-25 | Optical information reader |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5619176A (en) |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5755547A (en) * | 1980-09-22 | 1982-04-02 | Olympus Optical Co Ltd | Information reader of photomagnetic recording medium |
JPS57133537A (en) * | 1981-02-06 | 1982-08-18 | Sharp Corp | Magnetic and optical recording and reproducing head |
JPS57169947A (en) * | 1981-04-14 | 1982-10-19 | Sharp Corp | Magnetic optical head |
JPS59119730U (en) * | 1983-01-29 | 1984-08-13 | 三菱重工業株式会社 | Intermediate joint for oil-immersed wiring |
JPS59168951A (en) * | 1983-03-16 | 1984-09-22 | Sanyo Electric Co Ltd | Optical magnetic disc device |
JPS6064424U (en) * | 1983-10-05 | 1985-05-07 | 三洋電機株式会社 | magneto-optical disk device |
JPS6122449A (en) * | 1984-07-10 | 1986-01-31 | Matsushita Electric Ind Co Ltd | Optical pickup |
US4964110A (en) * | 1987-05-28 | 1990-10-16 | Sony Corporation | Apparatus for reproducing a magneto-optical disk using a shot noise reduction circuit |
JPH0316500A (en) * | 1989-06-14 | 1991-01-24 | Hitachi Ltd | Voice output volume interlocking with headphone output |
JPH08212615A (en) * | 1995-12-13 | 1996-08-20 | Sharp Corp | Optical device of magneto-optical storage device |
US6049518A (en) * | 1995-08-31 | 2000-04-11 | Sanyo Electric Co., Ltd. | Optical disc recording/reproducing apparatus recording/reproducing information to/from optical discs according to different standards |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0642151U (en) * | 1992-11-26 | 1994-06-03 | 株式会社タナカヤ | Partially stuck cardboard sheet |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3625617A (en) * | 1970-07-15 | 1971-12-07 | Honeywell Inc | Kerr effect read-out system for an optical memory |
US4101947A (en) * | 1976-10-04 | 1978-07-18 | Eastman Kodak Company | Narrow track magnetic-head recorder |
JPS53112039A (en) * | 1977-03-09 | 1978-09-30 | Philips Nv | Optical memory for mechanically addressing |
-
1979
- 1979-07-25 JP JP9627379A patent/JPS5619176A/en active Granted
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3625617A (en) * | 1970-07-15 | 1971-12-07 | Honeywell Inc | Kerr effect read-out system for an optical memory |
US4101947A (en) * | 1976-10-04 | 1978-07-18 | Eastman Kodak Company | Narrow track magnetic-head recorder |
JPS53112039A (en) * | 1977-03-09 | 1978-09-30 | Philips Nv | Optical memory for mechanically addressing |
Cited By (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0115932B2 (en) * | 1980-09-22 | 1989-03-22 | Olympus Optical Co | |
JPS5755547A (en) * | 1980-09-22 | 1982-04-02 | Olympus Optical Co Ltd | Information reader of photomagnetic recording medium |
JPS57133537A (en) * | 1981-02-06 | 1982-08-18 | Sharp Corp | Magnetic and optical recording and reproducing head |
JPH034976B2 (en) * | 1981-04-14 | 1991-01-24 | Sharp Kk | |
JPS57169947A (en) * | 1981-04-14 | 1982-10-19 | Sharp Corp | Magnetic optical head |
JPS59119730U (en) * | 1983-01-29 | 1984-08-13 | 三菱重工業株式会社 | Intermediate joint for oil-immersed wiring |
JPS59168951A (en) * | 1983-03-16 | 1984-09-22 | Sanyo Electric Co Ltd | Optical magnetic disc device |
JPS6064424U (en) * | 1983-10-05 | 1985-05-07 | 三洋電機株式会社 | magneto-optical disk device |
JPS6122449A (en) * | 1984-07-10 | 1986-01-31 | Matsushita Electric Ind Co Ltd | Optical pickup |
US4964110A (en) * | 1987-05-28 | 1990-10-16 | Sony Corporation | Apparatus for reproducing a magneto-optical disk using a shot noise reduction circuit |
JPH0316500A (en) * | 1989-06-14 | 1991-01-24 | Hitachi Ltd | Voice output volume interlocking with headphone output |
US6049518A (en) * | 1995-08-31 | 2000-04-11 | Sanyo Electric Co., Ltd. | Optical disc recording/reproducing apparatus recording/reproducing information to/from optical discs according to different standards |
US6122242A (en) * | 1995-08-31 | 2000-09-19 | Sanyo Electric Co., Ltd. | Optical disc recording/reproducing apparatus recording/reproducing information to/from optical discs according to different standards |
US6137764A (en) * | 1995-08-31 | 2000-10-24 | Sanyo Electric Co., Ltd. | Optical disc recording/reproducing apparatus recording/reproducing information to/from optical discs according to different standards |
US6167019A (en) * | 1995-08-31 | 2000-12-26 | Sanyo Electric Co., Ltd. | Optical Disc cd recording/reproducing apparatus recording/reproducing information to/from optical discs according to different standards |
JPH08212615A (en) * | 1995-12-13 | 1996-08-20 | Sharp Corp | Optical device of magneto-optical storage device |
Also Published As
Publication number | Publication date |
---|---|
JPS6215936B2 (en) | 1987-04-09 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPS5263614A (en) | Information detector | |
JPS5619176A (en) | Optical information reader | |
JPS57147148A (en) | Information reproducer with magnetooptic system | |
JPS5753832A (en) | Method and device for recording of optical information | |
JPS5558832A (en) | Signal recording and reproducing unit of optical type | |
JPS5494007A (en) | Pickup for disc recorder recorded optically with information | |
JPS5788540A (en) | Method and apparatus for information read-in of optical magnetic recording medium | |
JPS52109954A (en) | Optical signal reader | |
JPS57169947A (en) | Magnetic optical head | |
JP3162842B2 (en) | Optical information reproducing device | |
JPS57200953A (en) | Optical record carrier reader | |
JPS5558834A (en) | Optical readout method | |
JPS5661046A (en) | Optical disc device | |
JPS5574403A (en) | Light position detector | |
JPS5555445A (en) | Optical recording information reproducing device | |
JPS53107865A (en) | Detector of minute undulations | |
JPS57200961A (en) | Reader in optical magnetic disk recording and reproducing system | |
JPS55140968A (en) | Optical information reader | |
JPS5788535A (en) | Pickup device | |
WO1998037604A3 (en) | Optoelectronic device with a semiconductor diode laser amplifier | |
JPS57169935A (en) | Photodetector using semiconductor laser | |
JPS5637839A (en) | Magnetooptical reproducing device | |
YUJI | Optical recording and reproducing device | |
JPS6095737A (en) | Noise eliminating method | |
JPS54104302A (en) | Focus position detecting system |