title: Diffractive barcode using grating-dot lines.
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.
authors.affiliation: Department of Mechanical Engineering, Lunghwa University of Science and Technology, Kueishan Taoyuan County, Taiwan. slyeh@mail.lhu.edu.tw
authors.forename: Sheng Lih
authors.initials: SL
authors.lastname: Yeh
authors.forename: Shyh Tsong
authors.initials: ST
authors.lastname: Lin
authors.forename: Ya Chun
authors.initials: YC
authors.lastname: Tu