Chapter 3 Imaging; Overview; Aiming System; Aiming Error - Motorola Symbol MS4404 Integration Manual

Chapter 3 Imaging

Overview

This chapter provides information on aiming, illumination, focus control, data capture, beeper and decode LED
signals, supported symbologies, and operating modes.

Aiming System

A 650 nm laser and a DOE generate a laser-aiming pattern which represents the imager's field of view throughout
its entire depth of field. The aiming subsystem uses a visible laser diode, a lens, and a diffractive optical element to
generate the aiming pattern. The pattern's center cross hairs indicate the center of the field of view.
Figure 1-2. Aiming Pattern
Figure 3-1

Aiming Error

The aiming pattern is designed to eliminate divergence (parallax) between the aiming axis and the imaging axis.
This method provides an aiming axis parallel to the imaging axis, while minimizing the offset between the two. See
Table 4-3 on page 4-6

Aiming Control

The aiming subsystem is under dynamic software control and is independent of the illumination subsystem.The
Symbol MS440X can capture images with both the aiming subsystem turned on (the image of the aiming pattern is
captured in the digital image) and the aiming subsystem turned off.
and Table 4-4 on page 4-8 for aiming element specifications.