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LT 1804 Product Reference Guide: Glossary
Interleaved Bar Code A bar code in which characters are paired together, using bars to
Interleaved 2 of 5
LASER - Light
Amplification by
Stimulated Emission
of Radiation
Laser Diode
LED Indicator
MIL
Misread
(Misdecode)
Nominal
Nominal Size
Parameter
Percent Decode
represent the first character and the intervening spaces to represent
the second.
A binary bar code symbology representing character pairs in groups
of five bars and five interleaved spaces. Interleaving provides for
greater information density. The location of wide elements (bar/
spaces) within each group determines which characters are encoded.
This continuous code type uses no intercharacter spaces. Only
numeric (0 to 9) and START/STOP characters may be encoded.
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.
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).
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 -4
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