Apparatus and method for reading indicia using charge coupled device and scanning laser beam technology
AssigneeSymbol Technologies, Inc.
InventorMark Krichever
Life of this patent
Estimating the term…
Abstract
A scanning device for reading indicia of differing light reflectivity, including bar code symbols, has two parallel arrays of light emitters, such as lasers or light emitting diodes, for generating a scanning light beam to visually illuminate sequential portions of the indicia. Two parallel arrays of sensors, such as charge coupled or other solid state imaging devices, detect light reflected from portions of the indicia and generate an electrical signal representative of the spatial intensity variations of portions of the indicia. Each array is arranged transversely of the direction along which the symbol is scanned.
Claims17
A device for electro-optically reading a bar code symbol having bars and spaces of different light reflectivity arranged sequentially and spaced apart along a scan direction, each bar extending vertically along a transverse direction that extends generally perpendicular to the scan direction, the device comprising:
- a) a light source for generating a light beam;
- b) an optical element for directing the light beam toward the symbol for reflection therefrom;
- c) a scanner for scanning the light beam along the scan direction;
- and
- d) a linear array of solid state detector elements arranged along the transverse direction, for detecting return light reflected from the symbol over a field of view, and for generating an electrical signal representing the symbol.
A device for electro-optically reading a bar code symbol having bars and spaces of different light reflectivity arranged sequentially and spaced apart along a scan direction, each bar extending vertically along a transverse direction that extends generally perpendicular to the scan direction, the device comprising:
- a) a linear array of light emitting elements arranged along the transverse direction, for generating a light beam;
- b) an optical element for directing the light beam toward the symbol for reflection therefrom;
- c) a scanner for scanning the light beam along the scan direction;
- and
- d) a detector for detecting return light reflected from the symbol over a field of view, and for generating an electrical signal representing the symbol.
A bar code reader, comprising:
- a pair of linear arrays of solid state detector elements arranged adjacent and parallel to each other, each of the arrays being operative for detecting return light reflected from a bar code symbol over a field of view, and for generating an electrical signal representing the symbol.
Dependencies are inferred from the claim text.