Registers – Coded record sensors – Particular sensor structure
Patent
1990-05-11
1991-06-04
Pitts, Harold
Registers
Coded record sensors
Particular sensor structure
235455, 235462, G06K 710
Patent
active
050216422
ABSTRACT:
In an exemplary embodiment, a hand-held bar code reader has an elongated hand grip portion and a reader head portion which may be substantially spaced from a bar code data carrier during a reading operation. Light energy is directed outwardly through a window so as to illuminate a bar code sensing region in front of the window having a depth dimension of at least about ten millimeters. An optical system may focus bar code patterns in the sensing region onto an image photodetector in the reader unit with a resolution so as to read e.g. a bar code format with minimum bar or space width of about 0.0075 inch, or even less. Preferably the lens system provides a depth of focus for such bar code patterns of at least ten millimeters, so that a bar code pattern of marked curvature can be read in its entirety by means of an instant reading operation. Preferably the light source is of an electronically triggered essentially instant response type. A total bar code reader system including an operatively associated data terminal component may be conveniently carried by the user during bar code reading operations.
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Chadima, Jr. George E.
Laser Vadim
Norand Corporation
Pitts Harold
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