| Bar Code Scanner | | | | precise angle. A pen-wand scanner is moved |
| | | | over the bar to read it. General purpose |
| Barcode scanners are light emitting hand held | | | | scanners are generally used at checkout |
| devices use to read barcodes. The device is | | | | counters and hospitals and are also used to |
| attached to computer or laptop which stores | | | | process identification documents. Certain |
| coded message by the length and width of the | | | | other kinds of scanners, like rugged |
| bars and spaces that are printed in pattern. | | | | scanners, are generally used in harsh or |
| It has a code reader and decoder. The barcode | | | | extreme conditions. |
| scanners are on everything right from the | | | | |
| groceries to auto parts. It is the biggest | | | | The image scanner and laser scanner of the |
| asset to run a business. | | | | barcode scanner are the one with |
| | | | distinguishing features. The image scanner |
| We have been using barcode scanners for many | | | | has a camera in it that captures the barcode |
| years and more advanced technology is being | | | | images. These bar code images are then |
| introduced to us every year. They are | | | | processed by sophisticated image techniques |
| available in different varieties like the | | | | to decode the barcode. Generally most of the |
| hands free, hand held, rugged, wearable, scan | | | | image scanners scan barcode data from a |
| engines, laser or digital. The simplest | | | | distance of five to ten inches away. In laser |
| device is the Pen-wand scanners which have to | | | | scanner lenses are used to read the bar |
| be kept in direct contact with the barcode | | | | codes. The application of the laser scanner |
| and to be held at précis angle. To read | | | | helps in reading the barcode placed at any |
| the bars you need to move the pen-wand | | | | angle. The more advanced technology of laser |
| scanner over it. The general purpose scanner | | | | scanner reads the barcode from the distance |
| as the name indicates is used for general | | | | of 24 inches. Modern laser scanners have |
| purposes, to process identification documents | | | | outwit the capacity of laser scanner by |
| and checkout counters and hospitals. Other | | | | reading the data from the distance of 30 |
| kinds of scanners are used in harsh | | | | feet. |
| conditions like rugged scanners. | | | | |
| | | | Both the scanners are efficient in their own |
| Barcode scanners are available in many | | | | way but still have pros and cons in their |
| different varieties. They can be hand held | | | | use. The laser scanner being more advanced is |
| and hands free, wearable, and rugged, scan | | | | more expensive but the lenses of such |
| engines, laser or digital. Pen-wand scanners | | | | scanners are more prone to wear and tear. |
| are perhaps the simplest types of such | | | | Whereas the image based scanner is less |
| devices. They have to be kept in direct | | | | expensive but lacks internal movable parts |
| contact with the barcode and held at a | | | | making it less resistant to drops or knocks. |