Datalogic Joya Touch 22 User Manual page 112

GLOSSARY
Laser
Light Amplification by Stimulated Emission of Radiation.The laser is an intense light
source. Light from a laser is all the same frequency, unlike the output of an incandescent
bulb. Laser light is typically coherent and has a high energy density.
Light Emitting Diode (LED)
A low power electronic light source commonly used as an indicator light. It uses less
power than an incandescent light bulb but more than a Liquid Crystal Display (LCD).
Liquid Crystal Display (LCD)
A display that uses liquid crystal sealed between two glass plates. The crystals are
excited by precise electrical charges, causing them to reflect light outside according to
their bias. They use little electricity and react relatively quickly. They require external
light to reflect their information to the user.
MIL
1 mil = 1 thousandth of an inch.
Near-Field Communication (NFC)
A form of contactless communication two electronic devices over a distance of 4 cm
(1 1⁄2 in) or less. Contactless communication allows a user to wave a device over a NFC
compatible device to send information without needing to touch the devices together
or go through multiple steps setting up a connection.
Pairing
A Bluetooth@ pairing occurs when two Bluetooth@ devices agree to communicate with
each other and establish a connection.
Parameter
A variable that can have different values assigned to it.
RAM
Random Access memory. Data in RAM can be accessed in random order, and quickly
written and read.
Resolution
The narrowest element dimension which is distinguished by a particular reading device
or printed with a particular device or method.
RF
Radio Frequency.
Scanner
An electronic device used to scan bar code symbols and produce a digitized pattern that
corresponds to the bars and spaces of the symbol. Its three main components are:
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SDK
Software Development Kit.
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JOYA™ TOUCH 22
Light source (laser or photoelectric cell) - illuminates a bar code.
Photodetector - registers the difference in reflected light (more light reflected
from spaces).
Signal conditioning circuit - transforms optical detector output into a digitized bar
pattern.