Patent ID: 7204424

Claim:
A portable electro-optical scanner for reading a target bar code having a plurality of bar code elements, the portable scanner comprising: a housing supporting a scanning module and an exit window; the scanning module for scanning the target bar code with a scanning beam and collecting reflected light returning from the bar code, the scanning beam and the reflected light passing through the exit window, the scanning module including: a beam source emitting a scanning beam; beam directing apparatus causing the scanning beam to be repetitively scanned along a scanning direction across the target bar code; photodetector circuitry; and a light collection mirror having a field of view that follows the scanning beam as the scanning beam moves along the scanning direction, the light collection mirror receiving reflected light from the target bar code and directing the reflected light toward the photodetector circuitry and wherein at least a portion of the exit window comprises a lens having a positive optical power with respect to the scanning direction.