Symbol MiniScan MS-804FZY, Руководство по интеграции

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2-10
MS-804FZY and MS-904HS Integration Guide
Calculating The Usable Scan Length Method
Calculate usable scan length as follows (see Figure 2-8 on page 2-11 ):
L = 2 x (D+d+B) x Tan (A/2)
where:
D = Distance (in inches) from the front edge of the host housing to the bar
code.
d = The host housing’s internal optical path from the edge of the housing to the
front of the MiniScan scanner.
B = Internal optical path from the scan mirror to the front edge of the MiniScan
scanner.
A = Scan angle in degrees.
Note: Usable scan length determined by this formula, or 90% of scan line
at any working distance. This formula is based on good quality
symbols in the center of the working range and length of bar code.
Table 2-1. Calculation Constants
Constants B A
MS-804FZY 0.89 46.5°
MS-804FZY (Narrow) 0.89 35°
MS-904HS 0.77 37°