JPS57210458A - Optical reader - Google Patents
Optical readerInfo
- Publication number
- JPS57210458A JPS57210458A JP56096130A JP9613081A JPS57210458A JP S57210458 A JPS57210458 A JP S57210458A JP 56096130 A JP56096130 A JP 56096130A JP 9613081 A JP9613081 A JP 9613081A JP S57210458 A JPS57210458 A JP S57210458A
- Authority
- JP
- Japan
- Prior art keywords
- recording medium
- optical reader
- light beam
- read
- parallel beam
- 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
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Head (AREA)
Abstract
PURPOSE:To eliminate the influence of the upward and downward movement of a recording medium, by collimating a read light beam with which the recording medium is irradiated. CONSTITUTION:A light beam emitted 2 from a semiconductor laser 1 is passed through the 1st and 2nd convergent lenses 10 and 11 to obtain a parallel beam, which is reflected by a recording medium to illuminate a detector 9. The parallel beam has a 0.6mum diameter. Consequently, even when a recording medium moves up and down, recorded information is read.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56096130A JPS57210458A (en) | 1981-06-22 | 1981-06-22 | Optical reader |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56096130A JPS57210458A (en) | 1981-06-22 | 1981-06-22 | Optical reader |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS57210458A true JPS57210458A (en) | 1982-12-24 |
Family
ID=14156799
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP56096130A Pending JPS57210458A (en) | 1981-06-22 | 1981-06-22 | Optical reader |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57210458A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60181879A (en) * | 1984-02-29 | 1985-09-17 | Toshiba Corp | Photoelectric converting device |
JPS61155967U (en) * | 1985-03-20 | 1986-09-27 | ||
JPS6284440A (en) * | 1985-10-09 | 1987-04-17 | Mitsubishi Electric Corp | Information reader on surface of flat recording medium |
JPS6372655U (en) * | 1986-10-25 | 1988-05-16 |
-
1981
- 1981-06-22 JP JP56096130A patent/JPS57210458A/en active Pending
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60181879A (en) * | 1984-02-29 | 1985-09-17 | Toshiba Corp | Photoelectric converting device |
JPH057750B2 (en) * | 1984-02-29 | 1993-01-29 | Tokyo Shibaura Electric Co | |
JPS61155967U (en) * | 1985-03-20 | 1986-09-27 | ||
JPS6284440A (en) * | 1985-10-09 | 1987-04-17 | Mitsubishi Electric Corp | Information reader on surface of flat recording medium |
JPS6372655U (en) * | 1986-10-25 | 1988-05-16 |
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