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.
© 2008 Optical Society of America
Original Manuscript: June 6, 2008
Revised Manuscript: July 22, 2008
Manuscript Accepted: July 24, 2008
Published: August 20, 2008
Sheng Lih Yeh, Shyh Tsong Lin, and Ya Chun Tu, "Diffractive barcode using grating-dot lines," Opt. Lett. 33, 1942-1944 (2008)