Registers – Coded record sensors – Particular sensor structure
Patent
1985-09-17
1987-03-24
Pitts, Harold I.
Registers
Coded record sensors
Particular sensor structure
235383, 235467, 235470, G06K 710
Patent
active
046527320
ABSTRACT:
An apparatus for scanning a bar code affixed to an object and providing an electrical signal indicative of the scanned bar code. The apparatus includes a housing having a base portion and a window portion with the window portion being mounted above a rear section of the base portion. A forward section of the base portion has a flat top surface while the window portion has an optically transmissive window mounted in a side facing the top surface. The region above the top surface and adjacent the window defines a scanning region. Means are mounted within the housing for generating first, second and third scan patterns each comprised of a plurality of substantially parallel spaced apart light scan lines. The first scan pattern scan lines each enter the scanning region through the window at planes each at a predetermined angle from planes parallel to the top surface. The third scan pattern scan lines each enter the scanning region through the window at planes each at a second predetermined angle from planes parallel to the top surface. The second scan pattern scan lines each enter the scanning region through the window at planes each substantially perpendicular to the plane of the top surface. The second scan pattern scan lines are oriented along the window for entering the scanning region between the first and second scan pattern scan lines. Means are including for detecting light reflected from the bar code affixed to an object being scanned within the scanning region back through the window. The means for detecting light detects the reflected light having at least a predetermined intensity and provides an electrical signal in response thereto. Means are included for directing the reflective light from a bar code affixed to an object within the scanning region to the means for detecting light.
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National Semiconductor Corporation
Pitts Harold I.
Woodward Gail W.
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