Self-focusing bar code reader and optical receiving system

Details Self-focusing bar code reader and optical receiving system Self-focusing bar code reader and optical receiving system

1998-03-13

2000-02-08

Le, Thien M.

Registers

Coded record sensors

Particular sensor structure

250568, 2502012, 250252, 23546235, 23546223, 235460, G06K 710

Patent

active

060219467

ABSTRACT:
The invention relates to an optoelectronic sensor, in particular a bar code reader, with an optical receiving system positioned in front of a light receiver for the deflection of a light beam reflected from an object, in particular a bar code, onto the light receiver. Through the provision of aperture diaphragms, or a plurality of light receivers, or regions with different image forming characteristics in the optical receiving system, a situation is achieved in which the receiving characteristics of the overall system, which result by reason of the shape of the sensing laser beam, as a result of the characteristics of the electronic evaluation system and as a result of different light intensities of the light returned, for example from a bar code, are optimized for different sensing distances.

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patent: 4877949 (1989-10-01), Danielson et al.
patent: 5386105 (1995-01-01), Quinn et al.
patent: 5438187 (1995-08-01), Reddersen et al.
patent: 5473149 (1995-12-01), Miwa et al.
patent: 5550367 (1996-08-01), Plesko
patent: 5565668 (1996-10-01), Reddersen et al.
patent: 5641958 (1997-06-01), Rudeen

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