Microscan HE45T Uživatelský manuál stáhnout pdf (Strana 47)

Imager Field of View and Resolution

Getting Started

Rev 2.0.0, Jan 2009 HawkEye™ 45T User Manual 1-37

Imager Field of View and Resolution

The HE45T’s megapixel imager, with a dual field optical system, can provide

you the best image for 1-D and 2-D applications.

The 1.3 Million Pixel imager is divided into near field and far field decode zones.

In each zone, the resolution is 1024 x 640 pixels (see Figure 1.25). In this mode

of operation the reader utilizes the highest resolution creating the widest working

range on bar code and 2-dimensional symbols of all densities. The trade-off is the

amount of time the reader spends processing the image. This time can be reduced

by optimization functions:

• If only the near field is used (small, high density symbols), the far field

image can be ignored.

• If only the far field is used (large, lower density symbols), the near field can

be ignored.

Further optimization may be obtained by “windowing” the field to a smaller area.

FIGURE 1–39. SXGA Imaging Area

1024

640

Far

Near

1 2 ... 42 43 44 45 46 47 48 49 50 51 52 ... 101 102

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Microscan HE45T Uživatelský manuál Strana 47