Presentation on theme: "LINEAR AND BIDIMENSIONAL"— Presentation transcript:
1 LINEAR AND BIDIMENSIONAL BAR CODE BASICSINTRODUCTION TOLINEAR AND BIDIMENSIONALSYMBOLOGIES
2 BAR CODE BASICS Optical Symbologies 1 D - Codes 2 D - Codes STACKED CODESBAR CODESMATRIX CODES
3 BAR CODE BASICS What is a ONE-D code? It is a sequence of dark and light elements. The code can be considered like an alphabet where each character is composed by a specific sequence of “BARS” and “SPACES”.
4 BAR CODE BASICS What is a Stacked code? The terms stacked symbology or multi-row code are applied to those codes composed by stacked rows of one dimensional bar codes. Each row is independently decoded, but the complete information is obtained appending the single content of all individual rows.
5 BAR CODE BASICS What is a matrix Code? The term matrix code applies to 2D symbologies composed by black elements positioned in specific locations of a matrix. Each element has the same dimension, and the relative position of all elements in the matrix determines the information content of the code.
6 BAR CODE BASICS What is a Composite code? It is the combination of a linear and a stacked code. Typically, the linear code identify the item, and the stacked code contains additional relevant information (i.e. production date, expiration date, batch number, etc.).
11 STACKED SYMBOLOGY: PDF417 PDF: Portable Data Filemulti-row type: developed in 1992number of row: 3-90number of columns: 1-30row width: start/stop pattern, 3-32 symbol characters, quite zonerow height: 3X (cross row scanning: greater tilt angle), no row separatormax. data per symbol:numeric: 2710 digitalphanumeric: 1850 charactersit introduced the concept of error detection; and more: user selectable error correction levelsapplications:Government/Postal: identification card, official documentHealthcare: specimen tracking, claims processing, reagent calibrationLogistic: package tracking, shipping listManufacturing: process control, quality control, component control
12 MATRIX SYMBOLOGY: DATA MATRIX ECC200 matrix code type, International Data Matrix 1990:L-shaped dark finder patterninfinitely scalableAppend structure up to 16 symbolsReed-Solomon error correctionpack lot information into very small place: up to 3116 numeric or 2335 alphanumeric charactersmost popular application:marking of small itemsDirect Part Marking (DPM)small component marking (selected by EIA)silicon wafer marking (selected by SEMI)pharmaceutical unit dose and product marking
13 2D BENEFITS VS. 1DInformation just where you need it: on the spot and on the flyRobustness of the printed 2D symbolsMore information in a reduced areaPrinting cost reduction (direct marking / printing)