Instant portable bar code reader

Details Instant portable bar code reader Instant portable bar code reader

1989-10-20

1992-03-10

Pitts, Harold

Registers

Coded record sensors

Particular sensor structure

235455, 235462, 250566, G06K 910

Patent

active

050951971

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 triggerred 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, and the light source may be triggered non-manually upon detecting object proximity.

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