The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 22, 2009
Filed:
Jul. 03, 2007
Manfred Augstein, Mannhein, DE;
Joerg Dreibholz, Altrip, DE;
Dieter Falk, Radoltzell/Guettingen, DE;
Uwe Kass, Wattenheim, DE;
Heinz Macho, Fuerth, DE;
Manfred Augstein, Mannhein, DE;
Joerg Dreibholz, Altrip, DE;
Dieter Falk, Radoltzell/Guettingen, DE;
Uwe Kass, Wattenheim, DE;
Heinz Macho, Fuerth, DE;
Roche Diagnostics Operations, Inc., Indianapolis, IN (US);
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.