RJS Inspector D4000 Auto Optic (FIRMWARE version A.05 and Earlier) - Manual (Page 78)

Operator
’
s Guide Appendix K
002-5564 RJS, Minneapolis, MN 71
Scanner
An electronic device that converts printed information into electrical signals.
Scan Reflectance Profile
A record (usually graphically represented) of the reflectance measured using the
reference reflectivity method as a function of distance across the entire bar-code symbol.
Segment
Refers to the left and right grouping of modules or elements into segments to designate
parity for checking validity of a scan.
Self-checking
A bar-code or symbol that uses a checking algorithm, that can be applied to each
character, to guard against undetected errors. (Non-self-checked codes may use a check
digit or other redundancy in addition to the data message.)
Show-through
The generally undesirable property of a substrate that allows underlying markings of
materials to affect reflectance.
Space
The element of a bar-code symbol whose reflectance is greater than the global threshold.
A Space is the light reflective element. (As opposed to a bar which is the dark reflective
element.)
Space Reflectance (Rs)
The largest reflectance value in a space or quiet zone.
Specular Reflection
Reflection of light from a surface at an angle equal and opposite to the angle of
incidence.