A barcode reader is a specialized optical scanner that can read printed barcodes, decode the information contained in the barcode, send the data to a personal computer, and store the data. Like other flatbed scanners, it consists of an optic source, a lens to focus on the barcode, an eyepiece, and a laser sensor converting the optic impulses to electrical signals. In some cases, there is only one laser source for all barcode panels. Other times, the laser may be used separately or combined with another source like a barcode reader machine.
Components
The barcode reader machine has several key components. First is the optical scanning engine, which takes an image as captured from the input device, compresses the image into a series of binary codes. Next is the demodulation circuitry that decodes the images into the specific barcode that is being read. The final component is the identification circuitry that stores the binary coded data and retrieves the same for use.
Types of Barcode Scanners
Many barcode scanners are available in the market today. They differ in memory, storage capacity, speed, types of display, and other various features. Barcode scanners come in different sizes and price ranges, depending on the extent of their features.
Working
Most barcode reader/dispensers are built around an integrated circuit. This means that they use microprocessors to process and read the information. Some of the more sophisticated barcode printers come with their own integrated circuits as well. This further reduces the size of the integrated circuit, thereby improving its speed and operational efficiency. However, most of the time, the costlier barcode scanners and readers have their own built-in microprocessor.
Barcode scanners usually come with their own barcode reader and a barcode scanner pen. The barcode reader pen is used to feed the information onto the screen. The scanner itself either operates the barcode reader or commands it. There is a specific mechanism between the pen and the barcode reader. When the movement of the barcode reader against the stationary parts of the scanner creates friction, the scanner reads the information and displays it on the screen.
Barcode readers can also be connected to the computer via a USB cable to provide users with even more functions. For example, some scanners allow users to scan multiple pages at the same time without pausing. This feature speeds up your scanning tasks and saves on paper. However, you must keep in mind that if you want to scan a lot of pages, then it would be practical for you to buy your own barcode reader rather than using USB readers.