RJS Inspector D4000 Auto Optic (FIRMWARE version A.06 and Later) - Manual (Page 68)

Appendix K Operator
’s Guide
RJS, Minneapolis, MN 002-5564
Appendix K (Bar code definitions)
Achieved Width
The calculated element width based on measure-
ments.
Alphanumeric
A character set that contains letters, digits, and other
characters such as punctuation marks. Also, a char-
acter that is either numeric or alpha. (In programming
an alphanumeric cannot be used to do arithmetic)
ANSI
American National Standards Institute, Inc. 25 West
43rd Street, 4th floor New York, NY 10036
Aperture
The effective opening in an optical system that estab-
lished the field of view.
Application Specification
A set of rules for using bar code symbols.
Aspect Ratio
The ratio of height to width of a bar code symbol.
Bar
An element of a bar code symbol whose reflectance
is less than the global threshold. A Bar is the dark
(reflective) element of a bar-code. (As opposed to a
space which is the light reflective element)