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It 'scans' the barcode with a laser beam. The beam is reflected back to the reader, and hardware calculates the time taken. The wider the bar, the longer it takes for the beam to be reflected back. The time intervals are interpreted by the computer, and compared to a stock list.
What else can I help you with?
What bar code uses laser beams to read bar codes?
barcode
How are bar codes read?
Bar codes are read by a bar code reader. A low-powered laser in a bar code scanner emits a beam that crosses the bar code, generating a series of light and dark reflected flashes. These are read by the sensitive laser detector in the scanner and decoded to produce the numerical values shown on the label. These are compared to the codes in the store's computer to identify the item, look up the price, and add it to the register bill. Modern self-service check-outs have lasers that scan in two perpendicular directions, to read barcodes in any position relative to the scanner.
What is a bar code reader and is it buyable?
Bar codes no longer need specialized equipment to read them. Your smartphone has many apps that can read bar codes. There are apps where you can learn about the many types of bar codes and even generate and print bar codes of your own.
Why do all items have bar codes?
Bar codes identify the item and the price. They are used by a computer to provide the price and for inventory purposes.
What do bar codes represent?
bar codes are different for every item, they represent what the person is buying so the computer and understand what is being checked out
What is a bar code reader used for?
The bar code reader is used to read printed bar codes. It allows an attached computer to identify a product or item on which a bar code it printed and, most importantly, price that item to automate and speed checkout in a store or market.
Are lasers used to read bar codes on packages?
often times yes
Is an optical reader that uses laser beams to read bar codes?
Yes, an optical reader that uses laser beams to read bar codes is commonly known as a laser barcode scanner. These devices emit laser light to scan and capture the information encoded in bar codes, which is then processed and converted into readable data. Laser scanners are widely used in retail, logistics, and inventory management due to their speed and accuracy. They can read bar codes from a distance and are often preferred for their efficiency in high-volume scanning environments.
Is an ATM a bar code reader?
Nope - an ATM reads the magnetic strip on your cash-card. It doesn't read bar-codes.
Do bar codes show where product is made?
Yes it does say but you need a magnifiying glass to read it.
What types of bar codes can be read by the DBIDS pistol scanner?
Barcode 39 and PDF 417
How are bar codes used in the supermarket?
A laser scanner will read each representation of the barcode it can see
