Omnidirectional bar code label scanner

Details Omnidirectional bar code label scanner Omnidirectional bar code label scanner

1993-06-29

1995-11-07

Hajec, Donald

Registers

Coded record sensors

Particular sensor structure

235472, G06K 710

Patent

active

054649722

ABSTRACT:
An omnidirectional bar code label scanner includes a conventional deviator comprising a mirror rotating about a main axis at the center of a ring of reflective facets. A thin beam directed along the axis is deviated by 90.degree. to scan the successive facets and form a star pattern with 13 segments in a scanning plane. A light collector aimed at the scanning plane passes light reflected from a bar code label centered at a scanning center to a photosensor. To reduce the accuracy with which the label needs to be centered, a laser beam emitter directs a beam onto a rotating mirror a normal to which is at a small angle of inclination to the rotation axis. The reflected beam traces out a narrow aperture cone and is reflected 90.degree. by the fixed mirror towards the rotating mirror. As a result, the center of the star pattern traces out an ellipse around the scanning center.

REFERENCES:
patent: 2929061 (1960-03-01), Dauguet
patent: 3643068 (1972-02-01), Mohan et al.
patent: 4699447 (1987-10-01), Howard
patent: 4871904 (1989-10-01), Methtsky
patent: 4939356 (1990-07-01), Rando
patent: 4962311 (1990-10-01), Poisel et al.
patent: 5256865 (1993-10-01), Wike

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