Small-size hand-supported bar code reader

Details Small-size hand-supported bar code reader Small-size hand-supported bar code reader

1992-07-24

1994-06-07

Pitts, Harold

Registers

Coded record sensors

Particular sensor structure

235455, 235475, G06K 710

Patent

active

053191854

ABSTRACT:
A bar code reader has a sensor unit to be mounted on an operator's finger and a decoder unit to be mounted on an operator's wrist, the sensor and decoder units being electrically connected by a cable. The sensor unit has a light-emitting device for emitting light toward a bar code to be read, a graded-index rod lens array for focusing an entire linear optical image of the bar code at one time in substantially the same size as the bar code, and a line image sensor such as a CCD for photoelectrically converting the entire linear optical image focused by the optical means into an electric signal. The decoder unit decodes the electric signal from the line image sensor. The light-emitting device, the rod lens array, and the line image sensor are housed in a hollow casing. A movable tubular member is movably disposed in the hollow casing and has an end wall for abutment against the bar code. A switch for energizing the light-emitting device and the decoder unit is fixedly mounted in the hollow casing and triggerable by the movable tubular member when the movable tubular member is moved by abutment of the end wall thereof against the bar code.

REFERENCES:
patent: 3978318 (1976-08-01), Romeo et al.
patent: 4766299 (1988-08-01), Tierney et al.
patent: 5136145 (1992-08-01), Karney
"Principle of SLA", Selfoc Lens Array, pp. 13-20 (w/partial English translation).

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