You must have seen the barcode across every product and the barcode reader in every store. How is it that a simple barcode can hold so much information which is easily decoded by a barcode reader in the blink of an eye?
How do barcode readers work? What are the various types of barcode readers? Read on to explore these questions on barcode readers.
What Is a Barcode Reader? How Does It Work?
A barcode reader, otherwise referred to as a barcode scanner, is a sophisticated device utilized for the purpose of capturing and deciphering encoded data concealed within barcode symbols. Barcodes serve as visual depictions of information, comprising a sequence of parallel lines and spaces with diverse widths. These barcode representations can encompass a wealth of data, including product codes, pricing details, inventory numbers, and other pertinent information.
The working of a barcode reader revolves around the employment of optical technology to scan the visual depiction of the barcode. This, subsequently, transforms it into a digital format that can be comprehended and processed by computers and other compatible devices. This process entails the projection of a luminous beam across the barcode, with the reflected light being meticulously measured.
Through the conversion of light energy into electrical energy, the scanner effectively translates this into data through a decoding mechanism, ultimately transmitting it to a computer. Establishing a connection between barcode scanners and computers can be achieved using various means. This includes serial ports, keyboard ports, or an interface device commonly known as a wedge.
Barcode readers play a fundamental role in capturing and interpreting the wealth of information embedded within barcodes. Widely employed within retail establishments and warehousing facilities, they prove invaluable for the purpose of inventory tracking and sales monitoring. Barcode scanners can be either portable and handheld or stationary in nature, possessing the capability to decode barcodes across an extensive range of formats.
Types of Barcode Readers
Based on their features, barcode readers can be categorized into different types. Let’s explore the various types of barcode readers according to their characteristics and features.
Based on the Type of Scanning Engine
The scanning engine is the component responsible for capturing and interpreting barcode information. Based on the types of scanning engines they use, barcode readers are categorized into the following types:
- Laser Barcode Readers: As the name suggests, these readers use laser beams for scanning barcodes. Mostly used in retail sales, the reader emits a laser light that reflects off the barcode, and a sensor detects the reflected light, which is then converted into a digital signal. The best part is they can scan barcodes from a moderate distance.
- Pen-type Barcode Readers: Also known as wand-type barcode readers, it’s the simplest and least expensive type of barcode reader. These handheld scanners use a light source and a photodiode to read the barcode by detecting changes in light intensity. They have limited capabilities as they must remain in direct contact with the barcode. However, it has no moving parts and hence, is durable.
- Linear Image Barcode Readers: These readers use camera sensors to capture the barcode image and then analyze it from the variations in reflected light. They can read and process both 1D and 2D barcodes. The best part is they are more affordable and can even read damaged and unclear barcodes.
- Charge-Coupled Device (CCD) Barcode Readers: These readers capture barcode images using an array of hundreds of tiny light sensors which convert the light into electrical signals and then process it.
- 2D Area Imagers: These barcode readers are much similar to image scanners and use camera and image processing techniques to read barcodes. Mostly used in logistics and warehousing, these readers can read any type of barcode.
Based on the Shape of the Reader
Barcode readers can be categorized based on the shape and form factor of the reader itself. Here are some common types of barcode readers based on their shape:
- Manual Barcode Readers: Also known as handheld barcode readers, it’s the most common type. You can easily grip it single-handedly and point the scanner at the barcode to read it.
- Presentation Barcode Readers: Mostly used in-store checkouts, these bulky readers need to be placed on a fixed surface, thus promoting hands-free scanning. This reader is capable of scanning many items quickly and easily.
- PDA/Smartphone Barcode Reader: With the advancement of mobile technology, smartphones and personal digital assistants (PDAs) can now be used as barcode readers. Specialized apps can turn the built-in cameras of these devices into barcode scanners, allowing users to scan barcodes using their mobile devices.
Based on the Connection to the Host
Based on their connection to the host, barcode readers are of the following types:
- Wired Barcode Readers: These readers must be connected to the host device using a physical cable. They are cheaper and easier to set up in comparison to wireless readers.
- Wireless Barcode Readers: Such readers are connected to their host device using wireless technology such as Bluetooth or WiFi. Based on the choice of technology, they are further categorized as follows:
- Bluetooth Barcode Readers: These readers use Bluetooth technology for connection and have a range varying between 10-40 meters.
- WiFi Barcode Readers: These readers use WiFi technology for connection and have a greater range of up to 100 meters. It’s mostly used in logistics centers.
- USB Barcode Readers: readers connect directly to the host device via a USB interface. They are plug-and-play devices and do not require additional power sources or drivers. USB barcode readers are widely used and are compatible with most computers and POS systems.
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FAQ: How Does a Barcode Reader Work?
1. What is a barcode reader?
A barcode reader, otherwise referred to as a barcode scanner, is a sophisticated device utilized for the purpose of capturing and deciphering encoded data concealed within barcode symbols.
2. How does a barcode reader work?
A barcode reader uses optical technology to scan the barcode image, converting it into a digital format that can be interpreted by a computer or other devices.
3. What are the types of barcode readers based on the type of scanning engine?
The five types of barcode readers based on the type of scanning engine are laser readers, linear image readers, 2D area imagers, pen-type readers, and charge-coupled readers.
4. What are the types of barcode readers based on the shape of the reader?
The three types of barcode readers based on the shape of the reader are manual, presentation, and PDA/ smartphone barcode readers.
5. What are the types of barcode readers based on the connection to the host?
The three types of barcode readers based on the connection to the host are wired, wireless, and USB barcode readers.
Wrapping Up
Barcode readers are used in perhaps every business. From retail giants to small businesses, barcode readers have become indispensable tools, streamlining operations, minimizing errors, and enhancing efficiency. Embrace the power of barcode readers and unlock the endless possibilities they offer in the world of data management.
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