Light collection systems in electro-optical readers

Details Light collection systems in electro-optical readers Light collection systems in electro-optical readers

1999-03-16

2000-11-14

Le, Thien M.

Registers

Coded record sensors

Particular sensor structure

235454, G06K 710

Patent

active

061457434

ABSTRACT:
An optical scanner for reading indicia of variable light reflectivity, such as bar code symbols, having a light source for producing a light beam for scanning a target; a sensor for collecting the reflected light from the target; and various light collection systems, including a louver formed from an array of thin slats positioned adjacent to the sensor so that light directed along substantially only one angle reaches the sensor, as well as imaging/diffusing optical systems.

REFERENCES:
patent: 3887263 (1975-06-01), Thompson, III
patent: 4795253 (1989-01-01), Sandridge et al.
patent: 5202784 (1993-04-01), Reddersen

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