Radiant energy – Photocells; circuits and apparatus – Photocell controlled circuit
Reexamination Certificate
2007-07-03
2009-12-22
Le, Que T (Department: 2878)
Radiant energy
Photocells; circuits and apparatus
Photocell controlled circuit
C250S216000
Reexamination Certificate
active
07635834
ABSTRACT:
Systems and method for optically imaging objects and in particular optical patterns or codes onto a detection device by a pinhole aperture are described. According to an embodiment of the invention these systems have optical attenuation elements between the illumination devices and the object which substantially compensate the system-inherent imaging detects caused by the pinhole aperture and in particular the system-inherent peripheral decrease in brightness of an image of the object formed by a pinhole aperture on the detection device. According to an embodiment of the invention, the optical attenuation elements change the illumination intensity of the object in such a manner that the central areas of the object are illuminated at a lower light intensity than its peripheral areas. As a result of the subsequent imaging of the object by a pinhole aperture, the central areas of the object are imaged onto the detection device at a higher light intensity than the peripheral areas of the object. The superimposition of the two effects enables the imaging system according to the invention to achieve a substantially uniform system-inherent brightness distribution on the detection device.
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Product information for Microscan Quadrus EZ Technology for Data Tracking, http://www.quadrus-ez.com/products/quadrusez.htm.
Product information for Microscan QuadrusEZ: Vollintegrierter 2D-Code-Leser.
Augstein Manfred
Dreibholz Joerg
Falk Dieter
Kass Uwe
Macho Heinz
Le Que T
Roche Diagnostics Operations Inc.
Roche Diagnostics Operations Inc.
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