Working principle of optical tags

Optical tags are a technology that utilizes optical principles for identification and information transmission, commonly used in logistics, warehousing, and item tracking. Their working principle can be divided into the following key steps:

Tag Manufacturing: Optical tags are typically made of a special material capable of reflecting, absorbing, or altering the wavelength of light. These tags can be QR codes, barcodes, or other optically readable information carriers.

Information Encoding: The labeled information is embedded in the tag using specific optical encoding methods. For example, in a barcode, black and white stripes with different widths can represent different information. QR codes encode more data through more complex patterns.

Reading Device: Reading optical tags requires specialized optical reading equipment, such as laser scanners or image sensors. The device emits light onto the tag and receives the light reflected or scattered back from the tag.

Optical Signal Processing: The light signal received by the reading device is converted into an electrical signal, and after processing, the optical pattern is converted into digital information. For barcodes, the scanner identifies the width and arrangement of the stripes, while for QR codes, it deciphers more complex patterns.

Data Decoding: The processed signal is decoded into actual information, such as product number, price, and production date. This information can be transmitted to a computer system or database.

Application and Feedback: After decoding, the system can perform related operations, such as inventory management and logistics tracking. Furthermore, optical tags can be combined with technologies like RFID to further enhance functionality, such as enabling contactless reading.

Optical tag technology is widely used in many industries, including retail, healthcare, manufacturing, and transportation, due to its low cost, ease of operation, and high readability.