JPS6410433A - Optical information reader - Google Patents
Optical information readerInfo
- Publication number
- JPS6410433A JPS6410433A JP62164094A JP16409487A JPS6410433A JP S6410433 A JPS6410433 A JP S6410433A JP 62164094 A JP62164094 A JP 62164094A JP 16409487 A JP16409487 A JP 16409487A JP S6410433 A JPS6410433 A JP S6410433A
- Authority
- JP
- Japan
- Prior art keywords
- lens
- astigmatism
- hologram
- light
- information
- 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
Landscapes
- Holo Graphy (AREA)
- Optical Head (AREA)
Abstract
PURPOSE:To accurately read the information with simple and inexpensive constitution by providing two hologram lenses on a transparent base, radiating the light via one lens and receiving a reflected light through the other lens. CONSTITUTION:The divergent beam from a semiconductor laser 12 passes through a transparent base 13 and is led to the hologram 16, where the astigmatism is corrected and the result is radiated onto a recording medium 18. Then the reflected light radiated onto the medium 18 is made incident on the hologram lens 17 and the astigmatism or coma aberration is corrected by the lens 17 and converged and the light transmitted through the base 13 and the translucent mirror 15 is received by a photodetector 20 and the information signal is detected from the output of the detector 20. Thus, the information is always read accurately without causing the astigmatism or coma aberration due to oblique incidence of the read light to the recording medium with simple and inexpensive constitution.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62164094A JP2567859B2 (en) | 1987-07-02 | 1987-07-02 | Optical information reader |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62164094A JP2567859B2 (en) | 1987-07-02 | 1987-07-02 | Optical information reader |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6410433A true JPS6410433A (en) | 1989-01-13 |
JP2567859B2 JP2567859B2 (en) | 1996-12-25 |
Family
ID=15786654
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62164094A Expired - Lifetime JP2567859B2 (en) | 1987-07-02 | 1987-07-02 | Optical information reader |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2567859B2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5317551A (en) * | 1990-07-16 | 1994-05-31 | Matsushita Electric Industrial Co., Ltd. | Optical disk head including a light path having a thickness and width greater than the light beam wavelength by a predetermined amount |
US6624540B2 (en) * | 1998-11-20 | 2003-09-23 | Matsushita Electric Industrial Co., Ltd. | Packaging for automated supply of a brushless motor |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5348703A (en) * | 1976-10-15 | 1978-05-02 | Sony Corp | Optical signal regenerator |
JPS62173646A (en) * | 1986-01-28 | 1987-07-30 | Omron Tateisi Electronics Co | Pickup head in optical information processor |
-
1987
- 1987-07-02 JP JP62164094A patent/JP2567859B2/en not_active Expired - Lifetime
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5348703A (en) * | 1976-10-15 | 1978-05-02 | Sony Corp | Optical signal regenerator |
JPS62173646A (en) * | 1986-01-28 | 1987-07-30 | Omron Tateisi Electronics Co | Pickup head in optical information processor |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5317551A (en) * | 1990-07-16 | 1994-05-31 | Matsushita Electric Industrial Co., Ltd. | Optical disk head including a light path having a thickness and width greater than the light beam wavelength by a predetermined amount |
US6624540B2 (en) * | 1998-11-20 | 2003-09-23 | Matsushita Electric Industrial Co., Ltd. | Packaging for automated supply of a brushless motor |
Also Published As
Publication number | Publication date |
---|---|
JP2567859B2 (en) | 1996-12-25 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
EXPY | Cancellation because of completion of term | ||
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20071003 Year of fee payment: 11 |