barcode scanner

(redirected from Bar code reader)
Also found in: Acronyms.

barcode scanner

A device specialized for reading barcodes and converting them into digital data. Pen scanners, also known as wand scanners, were the first type of scanner developed in the 1970s. The tip of the pen must physically touch the barcode. Later, laser scanners allowed the code to be read at a distance from the head of the device, enabling supermarkets to read round cans and flexible packages more easily. The most common type today is the visible laser diode (VLD) scanner, which emits as many as 50 laser beams simultaneously to capture the image at any angle. See barcode, mobile tagging and point of sale.

Laser Diode Mechanism
A laser diode (1) emits a beam (red) onto a combination of rotating (2) and fixed mirrors (3) that shine multiple beams onto the barcode (4). Although as many as 50 beams may hit the package at different angles, only one is shown in this illustration. The reflected light (yellow) is captured by the collector (5) and aimed at a sensor (6).

The Reflection
The black bars absorb light, while the white bars reflect it. Photo diodes turn the reflected light into an electrical signal, which is converted into digital pulses.

Scanning a Package in Staples
Modern omnidirectional scanners make it easy to capture the code at all angles with less precision required on the part of the human operator.

The CueCat - A Most Unusual Barcode Scanner
As the Web was exploding at the turn of the century, this scanner was created to give businesses a Web presence. Connected to the PC, users could scan a printed Cat code and quickly get a Web page. Another part of the system was software for the PC that had to be connected to the audio output of a TV. It would listen for special Cue signals and deliver the Web page. With four million CueCats given away and $185 million invested, the Dallas, Texas-based firm fizzled to nothing in a short time.
Copyright © 1981-2019 by The Computer Language Company Inc. All Rights reserved. THIS DEFINITION IS FOR PERSONAL USE ONLY. All other reproduction is strictly prohibited without permission from the publisher.
References in periodicals archive ?
For example, if a bar code reader needs to read both a 10 mil and a denser 6 mil bar code at the same distance, the selected reader will need to have a scan envelope that accommodates the read range specifications for the 6 mil bar code traveling at the highest speed.
--Exabyte's Magnum 1x7 LTO Autoloader (one drive, 7 slots) with 2.8 TB capacity (compressed), 2u form factor, bar code reader, direct-attach SCSI, Ethernet port for remote management, and the benefits of LTO (Ultrium) technology.
Unique features of the STERRAD 200 System include an easy-to-read touch screen interface and an optional bar code reader to track instruments.
Any removal of this fixture is monitored and requires rescanning by a bar code reader before the cell continues operation.
A graduate student at the Massachusetts Institute of Technology has invented a hand-held electronic device that can instantaneously tell a consumer whether the manufacturer of a product is a "good corporate citizen." Encased within what The New York Times refers to as a "Cold-War-Era Geiger Counter," this somewhat bulky object contains a bar code reader equipped with a database listing pollution complaints and ethics violations allegedly committed by the company.
The Gryphon D200 ESD bar code reader was developed for electrostatic discharge (ESD) control and is composed of a slightly conductive plastic to prevent the accumulation of tri-boelectric charges.
The auto stop is capable of storing up to 400 programs and can be equipped with a bar code reader. For more information, call Frameware at 800-582-5680.
BioEngine fingerprint technology from Identix Incorporated will be used in a portable two-dimensional bar code reader and verification device from Datastrip, Inc.
According to Overland the LoaderXpess is the industry's first autoloader to incorporate a bar code reader, a true mail slot, a removable magazine for bulk loading/unloading of cartridges and a large four-line interactive display with 20 characters per line.
The system's reader, washer, incubators, bar code reader, ambient drawer, and electronics service pod are easily installed and removed for simple upgrade and repair.
Orders are placed online and the store employs a picker who canvasses the aisles with a laptop connected to a bar code reader. Since Birmingham, Mich.-based is connected to the store's central computer system, products are added and deleted automatically.