Bar-code reader

Registers – Coded record sensors – Particular sensor structure

Patent

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Details

235422, 340629, G06K 710

Patent

active

058804501

ABSTRACT:
A bar code reader includes a laser source for emitting a laser beam, and a scan device for scanning a bar code with the laser beam according to a predetermined scanning pattern. A window passes the laser beam from the scanning device toward the bar code which is in the vicinity of the window. A condenser condenses reflected light return from the bar code through the window and scanning device along the route traced by the laser beam. A photosensor detects the condense light and provides an electric signal which is proportional to the intensity of the detected light. A main body accommodates the laser source, the scanning device, the window, the condenser, and the photosensor. A cover is attached to the main body, and has an opening corresponding to the window. A buzzer is provided, to create a buzzing sound which resonates in a space formed between the main body and the cover.

REFERENCES:
patent: 4074341 (1978-02-01), Niederost et al.
patent: 4623878 (1986-11-01), Schoenwetter
patent: 5128520 (1992-07-01), Rando et al.

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