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Data Matrix Code
The Data Matrix code
The Data Matrix code is two-dimensional containing much more information for a given size than comparable codes like bar code or stacked codes. Several thousand characters can be stored in a code. Further advantages are the high reading speed and excellent data protection. The Data Matrix code can be structured differently and is variable in shape and size. The size can cover 1 x 1 mm to 100 x 100 mm, the shape can be square, rectangular or designed as a multi-segment code.
The structure of a Data Matrix code
Characteristic features are a continuous rectangular "finderbar" for the orientation of the code as well as the "alternating grid" for structuring. The data zone is within these "help elements". Around the code a "quiet zone" (free space) is necessary where no interfering structures are allowed and which must at least cover one module width (one square is called a "module").
High reading security
An important feature of the Data Matrix code is the high reading security even if the code is soiled or damaged. The reason for this is multiple presence of one and the same information at different positions in the data zone. If the code is damaged, the intelligent system can completely recompose the information from the different segments again. For the efector dualis the Reed Solomon principle is applied which can decode the code even if 28% of the information is destroyed.