Optical signal processor for barcode reader

Details Optical signal processor for barcode reader Optical signal processor for barcode reader

1991-05-20

1993-08-24

Shepperd, John

Registers

Coded record sensors

Particular sensor structure

250216, G06K 710

Patent

active

052391698

ABSTRACT:
A bar code reader having a scanned light and a stationary photodetector is disclosed. The photo detector uses a lens having a pyramidal frusta-like body to concentrate light. The input side has a pair of oppositely angles side planes facing opposite extremities of a scanned label. The faces can be used to mount filters to reject ambient light, and a polarizer can be used to reject specular reflection from the scanning laser.

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patent: 4820911 (1989-04-01), Arackellian et al.
patent: 4962311 (1990-10-01), Poisel et al.
patent: 5017765 (1991-05-01), Shepard et al.

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