Opticon LH2 - Manual (Page 25)

Chapter 3
24
Chapter 3
25
Definitions
Symbol Density: The amount of information versus the total area occupied by the symbol.
In order to achieve high density, the individual elements of a symbol must shrink. The highest
density symbols can only be resolved in the LH2 near-field image, where the resolution of the
imager is 1024 x 640 DPI. Symbol density is usually expressed in “Mils” - ie, thousandths of
inches. This size refers to the smallest width of a linear barcode or the “cell size” (individual
square) in a matrix barcode.
Working Range: The range from nearest to farthest that the object (the target symbol)
can be resolved and decoded. Parameters that effect working range are SYMBOL DENSITY
and the OVERALL SIZE of the symbol, the SYMBOLOGY used, the reflectivity of the surface,
the contrast of the symbol in relation to its background, the amount and type of illumination
available, and other environmental factors.
Resolution: Resolution is expressed in the table is the pixel array available for decoding a
SXGA Mode
Near Field Decoding: On
Far Field Decoding: On
NF Resolution: 1024 x 640
FF Resolution: 1024 x 640
Decode Try Time: Long SXGA Mode
Near Field Decoding: On
Far Field Decoding: On
NF Resolution: 1024 x 640
FF Resolution: 1024 x 640
Decode Try Time: Normal SXGA Mode
Near Field Decoding: On
Far Field Decoding: Off
NF Resolution: 1024 x 640
FF Resolution: NA
Decode Try Time: Normal SXGA Mode
Near Field Decoding: Off
Far Field Decoding: On
NF Resolution: NA
FF Resolution: 1024 x 640
Decode Try Time: Normal
SXGA Mode
Near Field Decoding: Off
Far Field Decoding: On
NF Resolution: NA
FF Resolution: 832 x 512
Decode Try Time: Normal
SXGA Mode
Near Field Decoding: On
Far Field Decoding: On
NF Resolution: 480 x 480
FF Resolution: 640 x 480
Decode Try Time: Short VGA Mode
Near Field Decoding: On
Far Field Decoding: On
NF Resolution: 480 x 320
FF Resolution: 480 x 320
Decode Try Time: Short VGA Mode
Near Field Decoding: On
Far Field Decoding: Off
NF Resolution: 480 x 320
FF Resolution: NA
Decode Try Time: Short VGA Mode
Near Field Decoding: Off
Far Field Decoding: On
NF Resolution: NA
FF Resolution: 480 x 320
Decode Try Time: Short
SXGA Mode
Near Field Decoding: On
Far Field Decoding: Off
NF Resolution: 640 x 640
FF Resolution: NA
Decode Try Time: Normal SXGA Mode
Near Field Decoding: On
Far Field Decoding: On
NF Resolution: 640x 512
FF Resolution: 832 x 640
Decode Try Time: Short SXGA Mode
Near Field Decoding: On
Far Field Decoding: On
NF Resolution: 832 x 640
FF Resolution: 1024 x 640
Decode Try Time: Normal
Small
A1 B1 C1 D1
A2 B2 C2 D2
A3 B3 C3 D3
A B C D
1
2
3
High
Low
Large
Symbol Density
Working Range
* Factory Default Setting
When choosing the correct setting for your environment (i.e. printed labels, direct marks...)
we recommend trying several settings. For a large majority of users, the B1 or B3 settings are
satisfactory. If you would like to greatly improve the reader’s performance on medium to large
1-D codes, try the D1 or D3 setting, The chart and definitions below will help you understand
the readers configuration for each setting.
* All triggers programmed to this setting at shipment
Small to Large Symbols
Near and Far Range
Small to Medium Symbols
(Close Range Only)
Medium to Large Symbols
(Far Range Only)