Method for laser writing multiple updatable miniature 2-D barcode data bases for electronic commerce

摘要: A method and system for recording storing digital data on optical memory cards labels in the form of miniature bar codes using laser storage media to create multiple updatable, 2-D codes, about 15 more than 500 times as much widely-adopted PDF-417, code. The is DRAW (direct-read-after-write) type which requires no post processing. pre-formatted with tracks precisely locate recorded microscopic spots. Groups these spots bars turn pixels whose dimensions are at least four greater linearly 16 area can be read photodetector arrays such CCD arrays.