Arrangement for and method of uniformly illuminating direct...

Details Arrangement for and method of uniformly illuminating direct... Arrangement for and method of uniformly illuminating direct...

2007-09-28

2011-10-04

Lee, Seung (Department: 2887)

Registers

Coded record sensors

Particular sensor structure

Reexamination Certificate

active

08028913

ABSTRACT:
Performance of an imaging reader for electro-optically reading direct part markings on workpieces is enhanced by uniformly illuminating the markings. An illuminator is operative for emitting illumination light of greater and lesser intensity toward the indicia. A diffuser is operative for diffusing the illumination light en route to the indicia. The diffuser includes a plurality of diffusing elements adjacent the illuminator for diffusing the illumination light of greater intensity more than the illumination light of lesser intensity.

REFERENCES:
patent: 6341878 (2002-01-01), Chiang
patent: 7083097 (2006-08-01), Toyama et al.
patent: 7201321 (2007-04-01), He et al.
patent: 2005/0011956 (2005-01-01), Carlson
patent: 2005/0194447 (2005-09-01), He et al.
patent: 2006/0175409 (2006-08-01), Reichenbach et al.
patent: 2008/0142604 (2008-06-01), Nunnink
patent: 2005/025311 (2005-01-01), None
International Search Report and the Written Opinion of the International Searching Authority for International Application No. PCT/US2008/077829, mailed Jan. 30, 2009.

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