Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1994-03-21
1997-01-28
Epps, Georgia Y.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
250568, 235462, 235463, 235472, G06K 710
Patent
active
055980074
ABSTRACT:
A symbology reader having a pair of optical sources for producing cursor beams. The cursor beams are emitted from two spaced apart locations on the reader and angled with respect to an image direction of a detector assembly within the reader. The cursor beams intersect at a desired object distance to form a composite image indicating that the reader is positioned an appropriate distance from a target object. In one embodiment, multiple composite images are formed. The composite images are spaced apart to delineate the extent of an object field of the detector assembly. In one embodiment, the optical sources are LEDs concealed beneath a mounting platform and emitting light transversely to the image direction. In this embodiment, turning mirrors redirect the light forward of the reader to form the cursor beams.
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Aragon Joel T.
Bunce Steven M.
Epps Georgia Y.
Intermec Corporation
Mack Ricky
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