It’s time for a little data capture 101. Today we’re going to take a closer look at bar code imagers and tomorrow we’ll provide more information about laser bar code scanners and make some comparisons.
Unlike a typical laser scanner, linear imagers use CCD (Charged Coupled Device) technology to capture the bars and spaces in a bar code and convert them into a video signal. Rather than using oscillating mirrors to capture the data of a bar code, linear imagers utilize LEDs (Light Emitting Diodes) and a lens to focus the image of the bar code onto the CCD component. This solid state design with no moving parts is the main reason that linear imagers are considered more reliable than standard laser scanners.
The lack of moving parts also provides a fast scan rate of 200-500 scans per second. Linear imagers can read 1D and 2D codes and are also capable of reading a thicker portion of a bar code, so they provide better reads of damaged or poorly printed codes. But even with all of these benefits, linear imagers are best suited for specific types of applications. The major drawback to linear imagers is their inability to scan at long ranges. Because of this, linear imagers are best suited for applications such as:
If your application doesn’t require a long scan range than you may want to take advantage of the numerous benefits offered by linear imagers. Check back tomorrow to learn more about laser bar code scanners and their capabilities.