RJS Inspector D4000 Auto Optic (FIRMWARE version A.06 and Later) User Manual
Page 71
Operator
’s Guide
Appendix K
002-5564
RJS, Minneapolis, MN
63
Decode
Determining the information which has been encoded
in a bar code symbol.
Decoder
The portion of a bar code reading system that per-
forms the decode function.
Defects
This parameter grade can be
“A,” “B,” “C,” “D” or “F.”
Defects are of two types, voids and spots. Voids are
light areas in bars, and spots are dark areas in spac-
es.
The defect grade is determined by a relationship be-
tween the largest defect in the symbol and symbol
contrast. The smaller the defect, the better the
grade. Aperture size can affect grade; for example,
using a small aperture to analyze a very wide ele-
ment will permit detection of the largest defects.
Defects are usually voids, and these defects can be
reduced by increasing the amount of ink (or equiva-
lent).
Diffuse Reflection
Reflected light which emanates uniformly in all direc-
tions from the reflecting surface.
Dimensional Deviation (DD)
The measured deviation of bars and/or spaces of a
scanned symbol from the specification.
Discrete Code
A bar code or symbol wherein the spaces between
the characters are not part of the data.