A multiple working range scanner includes a collection mirror which is
segmented, with each segment having differing optical properties, such as
focal length, optical axis, and so on. Differing segments or combinations
of segments deal with reflected light received at differing working
ranges, and direct it to a photodetector. In another embodiment, beam
shaping may be applied to an astigmatic laser beam, for example by means
of a part-concave mirror, to create an x waist in the beam which is
further from the scanner than the y waist. This provides enhanced
performance when the scanner is used on a bar code symbol which is not
accurately aligned. In order to provide improved optical alignment within
a bar code scanner, the collection mirror may be adjustable both in the x
direction and in the y direction.
