Laser bar code reader is a device designed to read barcodes printed on retailers’ products to control inventory and get up-to-date prices. Also known as barcode readers, they are electronic devices with light sources and light sensors that are used to convert optical images of printed barcodes into electrical images. Electrical information can be linked to an electronic cash register or some form of the computerized system designed to read the information.
Handheld barcode scanners are probably the most popular due to their flexibility and portability. Operators can use barcode scanners to locate barcodes and operate barcode scanners.
Desktop barcode scanners are very popular and can be found in many retail stores such as department stores and supermarkets. An item containing a barcode is placed over the scanner to obtain an image. It can be placed in the same location as the barcode. This allows the operators to find barcodes placed in embarrassing locations on products.
Different Techniques Used To Obtain Barcode Images
One simple technique that pen scanners use is to move the scanner in a steady motion over the barcode. And measure the distance between the dark and light bars with a photodiode to create an image. A laser scanner works similarly, except that it uses a laser as a light source. Some scanners use a camera to take a 2D image of the code and process that image to create a barcode.
Occasionally, a problem with Laser bar code reader is that they cannot read barcodes that are not perfectly placed on a flat surface. Or they cannot move the item holding the barcode into position. Some readers, such as those used in supermarkets, use laser technology. The Laser sends a series of light beams in different directions and in a predetermined pattern. The device may not be able to detect this pattern. It allows the detecting of even bad things images. on a flat surface.
Barcode readers have multiple interfaces that allow connection to a computer or storage device. Perhaps the most common interface is the USB interface that is available on most computers and peripherals today. The bar code reader can also receive power from the terminator, so no external power or battery is required. Early barcode readers could use the standard PC keyboard port, and barcode scanners could emulate the keyboard to display and store characters on the PC. This was often called a “keyboard wedge”.
Example Of Uses Of Barcode Scanners
Almost at every retail store, we can now see laser bar code reader is used at checkout counters. These readers or scanners are categorized into different types depending on the technology used and the methods used by the general public. Looking at the latter, they are classified as portable, portable, or installed. You may have seen it in many supermarkets while browsing the merchandise. Also most billing counters in retail stores are equipped with fixed code readers. An item scanner places the item on the scanner. Reads the item’s code, and determines the item’s price and any applicable discounts. Likewise, there are portable or handheld scanners for scanning items that are too heavy to fit on a stationary scanner.
Technology-based reading devices are categorized into pen type, laser, mobile phone camera reader, and CCD type. Pen and laser scanners use a similar technology. The source scans the code and photodiodes measure the intensity of light, producing waveforms to measure the width and spacing of the bars in the barcode. For pen-type readers, the light source is natural light, while for laser-type readers, it is a laser beam. A CCD reader uses an array of hundreds of tiny optical sensors arranged in a line and exploits the same phenomenon described above.