RJS Inspector D4000 Auto Optic (FIRMWARE version A.05 and Earlier) - Manual (Page 66)

Operator
’
s Guide Appendix K
002-5564 RJS, Minneapolis, MN 59
Appendix K
Bar-code Definitions
Achieved Width
The calculated element width based on measurements.
Alphanumeric
A character set that contains letters, digits, and other characters such as punctuation
marks. Also, a character that is either numeric or alpha.(In programming an alphanumeric
cannot be used to do arithmetic.)
ANSI
American National Standards Institute, Inc. 1430 Broadway, New York, New York
10018
Aperture
The effective opening in an optical system that established 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.)