JPS6459477A - Bar code reader of laser beam scanning system - Google Patents
Bar code reader of laser beam scanning systemInfo
- Publication number
- JPS6459477A JPS6459477A JP62216003A JP21600387A JPS6459477A JP S6459477 A JPS6459477 A JP S6459477A JP 62216003 A JP62216003 A JP 62216003A JP 21600387 A JP21600387 A JP 21600387A JP S6459477 A JPS6459477 A JP S6459477A
- Authority
- JP
- Japan
- Prior art keywords
- output signal
- sampling
- circuit
- holding circuit
- signal
- 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
Abstract
PURPOSE:To miniaturize a device and to improve the performance by obtaining an envelope signal of a pulse modulated wave simultaneously with removal of a diffused external light component to facilitate binarization thereafter. CONSTITUTION:A first sampling and holding circuit 8 samples an output signal 7 in its peak part as shown by a timing signal 12, and a second sampling and holding circuit 9 samples it in the adjacent bottom part (phase shifted by 180 deg.). An output signal 13 of the first sampling and holding circuit 8 has the same waveform as an envelope of maximum values of an output signal 7 of a detecting circuit 6. An output signal 14 of the second sampling and holding circuit 9 has the same waveform as an envelope of minimum values. An output signal 16 is inputted to a succeeding binarizing circuit 17, and the binarized signal is inputted to a recognizing circuit 18 to recognize a bar code. Thus, the device is miniaturized and the performance is improved.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62216003A JPS6459477A (en) | 1987-08-29 | 1987-08-29 | Bar code reader of laser beam scanning system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62216003A JPS6459477A (en) | 1987-08-29 | 1987-08-29 | Bar code reader of laser beam scanning system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6459477A true JPS6459477A (en) | 1989-03-07 |
Family
ID=16681783
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62216003A Pending JPS6459477A (en) | 1987-08-29 | 1987-08-29 | Bar code reader of laser beam scanning system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6459477A (en) |
-
1987
- 1987-08-29 JP JP62216003A patent/JPS6459477A/en active Pending
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