Operating Instructions
Chapter
10
CLV 490 Bar Code Scanner
8 008 796/0000/25-06-2002
©
SICK AG · Division Auto Ident · Germany · All rights reserved
10-77
Appendix
10.16 Glossary
For further terms, please refer to the
"CLV-Setup Help".
Adjusting mode
Special operating mode that enables the center of the scan line to be positioned exactly on
the object containing the bar code.
Aperture angle
α
Angle within whose limits the laser beam is deflected by the polygon mirror wheel. A
V-shaped range perpendicular to the scan direction, which must contain the bar code, is for-
med in front of the reading window. If only part of this aperture angle is used (part of the
scan line symmetric around the center point), the depth of field for the focus position and
resolution is greater.
Aspect ratio
Ratio code height (bar length) to code length (numer of characters) Using the SMART Deco-
der even bar codes with very small code height can be read.
Autofocus function
Ability of the CLV to detect the distance of the objects during the reading operation without
external sensors in order to adapt the focus position to the reading plane of the bar codes.
Auxiliary input
Special function on
Ö
the terminal interface. Used to enter bar code data subsequently in
order to complete reading results sent to the host.
Capture range
Zone around a moving bar code created by the CLV using the increment management and
code position comparison functions. Enables bar codes with identical contents and code
type to be separated.
Christmas tree effect
Effect caused by limiting the active scan line range (CP values) and oscillating amplitude
(CW values) on the
Ö
line scanner with oscillating mirror. In this way, a uniform sharply
defined window can be created in the reading field for each distance configuration,
independent of the reading distance.
CLV-Setup
PC program that runs on Windows 95
TM
/98
TM
and Windows NT
TM
and is used to para-
meterize the CLV offline (adjust the device to the local conditions) and operate it online. The
parameter set is exchanged with the CLV by
Ö
uploading and
Ö
downloading it.
CLV-Setup Help
Online help function that provides support for using the "CLV-Setup" program. The help
function explains the CLV parameters and their permissible values and can be launched
directly from CLV-Setup in an HTML browser, such as Netscape Navigator
TM
, or I-ViewPro
TM
supplied with the program.