JPS6459477A - Bar code reader of laser beam scanning system - Google Patents

Bar code reader of laser beam scanning system

Info

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
Application number
JP62216003A
Other languages
Japanese (ja)
Inventor
Atsushi Nakazawa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sumitomo Electric Industries Ltd
Original Assignee
Sumitomo Electric Industries Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Sumitomo Electric Industries Ltd filed Critical Sumitomo Electric Industries Ltd
Priority to JP62216003A priority Critical patent/JPS6459477A/en
Publication of JPS6459477A publication Critical patent/JPS6459477A/en
Pending legal-status Critical Current

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.
JP62216003A 1987-08-29 1987-08-29 Bar code reader of laser beam scanning system Pending JPS6459477A (en)

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)

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