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Title:
FOCUSSING METHOD FOR BARCODE READING DEVICE
Document Type and Number:
WIPO Patent Application WO/2008/040160
Kind Code:
A1
Abstract:
A focussing method for barcode reading device is disclosed. Inside an imaging system assembly of the barcode reading device, a focussing structure is configured to enable an angle of a field of view of optical signal generated by the focussing structure match with an for code reading. Adjust distance or relative position between the barcode reading and a barcode read, and the distance for code reading is optimum distance while edge position of the barcode is just covered by edge of the optical signal generated by the focussing structure. According to the invention, because the angle of the field of view of the optical signal generated by the focussing structure matches with the angle of the field of view of the optical lens for code reading, operator can determine the optimum distance for barcode reading accurately based on comparing focussing optical signal emitted on the barcode from the barcode reading device with size scope of the barcode during reading the barcode.

More Like This:
JP3798629IMAGE READER
Inventors:
SUN YALI (CN)
LIU RONGSHENG (CN)
XU MENGHONG (CN)
CHEN WENCHUAN (CN)
Application Number:
PCT/CN2007/002719
Publication Date:
April 10, 2008
Filing Date:
September 14, 2007
Export Citation:
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Assignee:
FUJIAN NEWLAND AUTO ID TECH CO (CN)
SUN YALI (CN)
LIU RONGSHENG (CN)
XU MENGHONG (CN)
CHEN WENCHUAN (CN)
International Classes:
G06K7/10
Foreign References:
CN2630943Y2004-08-04
US20020148900A12002-10-17
US5710418A1998-01-20
Attorney, Agent or Firm:
BEIJING SUNLIGHT LAW FIRM (Kun Tai Building10 Chao Wai St, Chao Yang, Beijing 0, CN)
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