Bar code reading apparatus

Details Bar code reading apparatus Bar code reading apparatus

1997-03-03

1999-06-29

Minh, Le Thien

Registers

Coded record sensors

Particular sensor structure

2354622, G06K 710

Patent

active

059171715

ABSTRACT:
The present invention relates to a bar code reading apparatus that is useful for recognizing by human eyes whether a light beam is being projected onto a bar code symbol. The bar code reading apparatus contains a first and second light source to radiate a first ray and a second visible ray, respectively. The second visible ray has higher visibility than first light beam for human eyes. As a result, an operator can easily recognize whether the light beams are projected onto a bar code symbol. Another bar code reading apparatus contains first and second photo detectors for receiving a first and a second reflected beam, respectively. With this arrangement two different bar code symbols can be simultaneously read by the bar code reading apparatus.

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patent: 5640001 (1997-06-01), Danielson et al.
patent: 5698835 (1997-12-01), Dvorkis et al.

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