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LASER - Light
Amplification by
Stimulated
Emission of
Radiation
Laser Diode
LED Indicator
MIL
Misread
(Misdecode)
MSI Plessey
Nominal
Nominal Size
NOTIS Editing
Parameter
Percent Decode
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.
A gallium-arsenide semiconductor type of laser connected to a power
source to generate a laser beam. This laser type is a compact source of
coherent light.
A semiconductor diode (LED - Light Emitting Diode) used as an indicator,
often in digital displays. The semiconductor uses applied voltage to
produce light of a certain frequency determined by the semiconductor's
particular chemical composition.
1 mil = 1 thousandth of an inch.
A condition which occurs when the data output of a reader or interface
controller does not agree with the data encoded within a bar code symbol.
A numeric-only bar code type. MSI Plessey consists of four bars and four
adjacent spaces. Each bar\space pair consists of one information bit. A
zero bit consists of a narrow bar followed by a wide space, while one bit
consist of a wide bar followed by a narrow bar. The zero bit is one unit bar
followed by a two-unit space and the one bit is a two-unit bar followed by
a one unit space. The primary application for the MSI Plessey code is
marking of retail shelves and subsequent scanning
with portable devices for inventory purposes.
The exact (or ideal) intended value for a specified parameter. Tolerances
are specified as positive and negative deviations from this value.
Standard size for a bar code symbol. Most UPC/EAN codes can be used
over a range of magnifications (e.g., from 0.80 to 2.00 of nominal).
An option that strips the start and stop characters from a decoded Codabar
symbol.
A variable that can have different values assigned to it.
The average probability that a single scan of a bar code would result in a
successful decode. In a well-designed bar code scanning system, that
probability should approach near 100%.
Glossary
Glossary-5
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