DX bar code reader

Year	Description
1992	Invention patented by James R. Milch on April 29th, 1992. Abstract: The invention provides an inexpensive and compact bar code reader that is capable of reading separate clock and data tracks of a DX bar code without the use of custom optical devices or optical projection. The bar code reader includes first and second light sources, a photodetector device that generates an output signal proportional to the amount of light directed to the photodetector device from the first and second light sources, an analog-to-digital converter that samples the output signal of the photodetector device to generate digital data signals, and a control processor that controls the operation of the first and second light sources.
Source: selected by the editor from original sources.

Invention: DX bar code reader