Microscan MS-Q Imager Manuel d'utilisateur Page 110

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Vue de la page 109
Calculate FOV from Tables
9-4 COPYRIGHT © 2005 MICROSCAN SYSTEMS
High Resolution
For example, you have a Standard Resolution MS-Q that is reading a 0.45” symbol
width in the near field at 4”. You look across the 4” row to find a FOV width that’s
approximately twice your symbol size, 0.91. Your pixel width for this size is 512. Read
the Medium 2-dimensional symbol in
“Select Region of Interest”
on page 9-2 to
narrow your FOV accordingly.
Near Field
Focal Distance = 2.75” (70 mm) (Horizontal Angle = 21 degrees, Vertical Angle = 13 degrees)
Distance from
Tar g e t
FOV 1024 x 640
320 x
320
480 x
480
512 x
512
640 x
640
1024 640
in. mm
in. mm in. mm in. in. in. in.
0.5 13
0.19 5 0.11 30.060.09 0.09 0.11
125
0.37 9 0.23 60.110.17 0.18 0.23
1.5 38
0.56 14 0.34 90.170.26 0.27 0.34
251
0.74 19 0.46 12 0.23 0.34 0.36 0.46
2.5 64
0.93 24 0.57 14 0.28 0.43 0.46 0.57
2.75 70
1.02 26 0.63 16 0.31 0.47 0.50 0.63
376
1.11 28 0.68 17 0.34 0.51 0.55 0.68
3.5 89
1.30 33 0.80 20 0.40 0.60 0.64 0.80
4102
1.48 38 0.91 23 0.46 0.68 0.73 0.91
Far Field
Focal Distance = 4.5” (11 mm) (Horizontal Angle = 21 degrees, Vertical Angle = 13 degrees)
251
0.74 19 0.46 12 0.23 0.34 0.36 0.46
2.5 64
0.93 24 0.57 14 0.28 0.43 0.46 0.57
376
1.11 28 0.68 17 0.34 0.51 0.55 0.68
3.5 89
1.30 33 0.80 20 0.40 0.60 0.64 0.80
4102
1.48 38 0.91 23 0.46 0.68 0.73 0.91
4.5 114
1.67 42 1.03 26 0.51 0.77 0.82 1.03
5127
1.85 47 1.14 29 0.57 0.85 0.91 1.14
5.5 140
2.04 52 1.25 32 0.63 0.94 1.00 1.25
6152
2.22 56 1.37 35 0.68 1.03 1.09 1.37
6.5 165
2.41 61 1.48 38 0.74 1.11 1.18 1.48
7179
2.59 66 1.60 41 0.80 1.20 1.28 1.60
7.5 191
2.78 71 1.71 43 0.85 1.28 1.37 1.71
8203
2.97 75 1.82 46 0.91 1.37 1.46 1.82
8.5 216
3.15 80 1.94 49 0.97 1.45 1.55 1.94
9229
3.34 85 2.05 52 1.03 1.54 1.64 2.05
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