Hand-held terminal with reciprocally oscillating laser
First Claim
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1. A hand-held terminal for processing data relating to bar code symbols having parts of different light reflectivity, comprising:
- a) a housing having a window mounted thereon;
b) a semiconductor laser mounted for reciprocating movement within the housing for generating a laser beam;
c) an optical component within the housing for optically modifying and directing the laser beam along a transmission path through the window;
d) an electromagnetic drive for reciprocally oscillating the laser to sweep the modified laser beam across a symbol located externally of the window of the housing, said drive including a permanent magnet having a permanent magnetic field, and an electromagnetic coil having a magnetic field that interacts with said permanent magnetic field;
e) a photodetector mounted within the housing for sensing light reflected from the symbol along a return path, and for generating an electrical signal indicative of the detected light intensity;
f) a keyboard on the housing within access of an operator for manually entering data relating to the symbol; and
g) a display on the housing within view of the operator for visually displaying data relating to the symbol.
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Abstract
In bar code symbol scanning systems employing laser, optical and sensor components, a mirrorless scanner arrangement mounts one or more of these components on a drive for repetitive reciprocating laser movement either about an axis or in a plane to effect scanning.
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Citations
7 Claims
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1. A hand-held terminal for processing data relating to bar code symbols having parts of different light reflectivity, comprising:
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a) a housing having a window mounted thereon; b) a semiconductor laser mounted for reciprocating movement within the housing for generating a laser beam; c) an optical component within the housing for optically modifying and directing the laser beam along a transmission path through the window; d) an electromagnetic drive for reciprocally oscillating the laser to sweep the modified laser beam across a symbol located externally of the window of the housing, said drive including a permanent magnet having a permanent magnetic field, and an electromagnetic coil having a magnetic field that interacts with said permanent magnetic field; e) a photodetector mounted within the housing for sensing light reflected from the symbol along a return path, and for generating an electrical signal indicative of the detected light intensity; f) a keyboard on the housing within access of an operator for manually entering data relating to the symbol; and g) a display on the housing within view of the operator for visually displaying data relating to the symbol. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification