Barcode Readers | Cognex (2024)

FAQs

What is the difference between barcode scanner and barcode reader? ›

A barcode reader works by directing a beam of light across the barcode and measuring the amount and pattern of the light that is reflected. The scanner converts the light energy into electrical energy, which is then converted into data by the decoder and forwarded to a computer.

There are five main types of barcode readers. These are pen wands, slot scanners, Charge-Couple Device (CCD) scanners, image scanners, and laser scanners. Each of these is detailed below.

The Disadvantages of Barcode Scanning and the Human Factor

Finally, barcode scanning is limited by its reliance on physical data tags or labels; if these become damaged or removed from an item, it may be difficult to scan the product accurately. Another disadvantage of barcode scanning is the potential for human error.

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2D codes, such as QR codes and Data Matrix, use squares, hexagons, and other shapes to store data. Not all barcode scanners can read all barcodes. Laser barcode scanners and linear imagers read only 1D barcode scanners. Imager (camera-based) 2D barcode scanners read all common 1D and 2D barcodes.

Each barcode type has its data capacity threshold, so it's essential to take this into account when selecting a barcode type. In general, 1D barcodes have a lower data capacity when compared to 2D barcodes. This is because 1D barcodes store data horizontally, whereas 2D barcodes store data horizontally and vertically.

The latest trend in barcoding, QR Codes are gaining popularity as marketing tools to link to web based information. Not as compact as Data Matrix, you will find them often used on advertising materials and storefronts, linking to special promotions or details about a certain product.

RFID avoids the limitations of barcode scanning, which requires line-of-sight access to each barcode and can only be used to scan one item at a time. Instead, RFID tags do not require line-of-site, and multiple RFID tags can be detected and read remotely and simultaneously.

Are barcodes obsolete? ›

The design has such an advantage that, by the end of 2027, GS1 aims to allow companies to entirely replace the old zebra-striped barcode with a QR code on products. The barcode won't formally be phased out, but it seems destined to disappear from price tags and packages as QR codes take over.

RFID systems are much more efficient for scanning a large number of items but can be more expensive and require more setup than barcodes. On the other hand, barcode systems can sometimes be more accurate but are less durable and secure than RFID.

A clear image should work. The QR code is a 2-dimensional barcode consisting of tall black and white stripes that are read by an imaging device such as a camera or scanner. Any standard camera will be able to make room for this. Unless the QR code is too blurry to read, a screenshot will work.

Use Online Barcode Decoding Tools

Numerous online tools can help decode barcodes using the numbers beneath the bars. Websites like Barcode Lookup or Online Barcode Reader allow you to enter the numbers manually and get instant results about the product associated with the barcode.

Print your barcode and take it to a retail store. Ask if you can scan your barcode at the register. (Bribe the cashier with snacks.) The scanner should pick up your barcode and beep, confirming that the barcode is readable.

A code reader is a simplified version of a scan tool, but it's only capable of performing basic scans of trouble codes. A scan tool can read and clear trouble codes, and it may also provide advanced data reading and playback features, knowledge bases, diagnostic procedures, and built-in testing equipment.

Numerous online tools can help decode barcodes using the numbers beneath the bars. Websites like Barcode Lookup or Online Barcode Reader allow you to enter the numbers manually and get instant results about the product associated with the barcode.

A quick scan of the barcode attached to any important item, from laptops, to products, to folders with sensitive files, to safety equipment, scanners can quickly tell you everything you need to know about the item you are seeking and can update your system with the most timely information possible.

A barcode reader or barcode scanner is an optical scanner that can read printed barcodes and send the data they contain to computer. Like a flatbed scanner, it consists of a light source, a lens, and a light sensor for translating optical impulses into electrical signals.