Scanning arrangement and method in which the focus is varied in

Details Scanning arrangement and method in which the focus is varied in Scanning arrangement and method in which the focus is varied in

1991-12-23

1995-01-31

Hajec, Donald

Registers

Coded record sensors

Particular sensor structure

235462, 235467, 359824, G06K 710

Patent

active

053861078

ABSTRACT:
A device for reading indicia on a target in which the indicia has regions of differing light reflectivity. The device directs a light beam toward the indicia, and collects reflected light from the indicia. The focus of the light beam is varied to enable the device to read indicia at different working distances, and the maximum scanning angle of the light beam is varied in operative correlation with the focus.

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