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Diffractive barcode using grating-dot lines
Sheng Lih Yeh1, Shyh Tsong Lin, Ya Chun Tu
1Department of Mechanical Engineering, Lunghwa University of Science and Technology, Kueishan Taoyuan County, Taiwan. slyeh@mail.lhu.edu.tw
Abstract:
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.
