Information reader for optically reading code on object

Details Information reader for optically reading code on object Information reader for optically reading code on object

2011-01-18

2011-01-18

Le, Thien M (Department: 2887)

Registers

Coded record sensors

Particular sensor structure

C235S462240

Reexamination Certificate

active

07871003

ABSTRACT:
An information reader has blocks of bright field illuminating units illuminating an information code directly marked on an object with first lights to regularly reflect the lights on the code, blocks of dark field illuminating units illuminating the code with second lights to irregularly reflect the lights on the code, an optical system, and a control section lighting the blocks of bright and dark field illuminating units by turns or simultaneously. The optical system forms an image of the code from each of the first and second lights or a combination of the first and second lights reflected on the code and reads the code from the images. The first lights are transmitted along an optical axis of the optical system. The second lights are transmitted toward the optical axis while slightly shifted toward the code.

REFERENCES:
patent: 5923020 (1999-07-01), Kurokawa et al.
patent: 6661521 (2003-12-01), Stern
patent: 2006/0131419 (2006-06-01), Nunnink
patent: 697 25 021 (2004-04-01), None
patent: 601 30 546 (2008-08-01), None
patent: A-2000-099625 (2000-04-01), None
patent: A-2005-018391 (2005-01-01), None
Office Action issued from the German Patent Office on Apr. 2, 2009 in the corresponding German patent application No. 10 2007 032 589.6-53 (and English translation).

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