Diffractive barcode using grating-dot lines.
Bar arrangements used by conventional diffractive barcodes are usually similar to those used by diffusive barcodes. We, however, propose a modified diffractive barcode with bar arrangements different from those used by diffusive barcodes. A modified diffractive barcode pattern is composed of many parallel grating-dot lines. When the grating-dot lines are scanned by a laser beam in sequence, different bright bar arrangements corresponding to different codes appear in sequence.
Yeh
Sheng Lih
SL
Department of Mechanical Engineering, Lunghwa University of Science and Technology, Kueishan Taoyuan County, Taiwan. slyeh@mail.lhu.edu.tw
Lin
Shyh Tsong
ST
Tu
Ya Chun
YC