Optical scanners having dual surface optical elements for...

Details Optical scanners having dual surface optical elements for... Optical scanners having dual surface optical elements for...

G - Physics

06

K

G06K 9/20 (2006.01) G02B 26/10 (2006.01) G06K 7/10 (2006.01)

Patent

CA 2580492

The invention relates to optical scanners. The invention comprises a multi-range scanner assembly for electro-optically reading indicia having parts of differing light reflectivity on a target located at a variable distance from the assembly, comprising: (a) a first light source for producing a first beam for short range scanning operations; (b) a second light source for producing a second beam for long range scanning operations; (c) a scanning element including a scanning mirror for causing the first and second beams to be alternately scanned over a field of view; (d) a collection optical system for collecting light reflected from the field of view; and (e) an optical detector for detecting light directed thereto by the collection optical system and for generating electrical signals corresponding to the reflected light.

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