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. 01, 2009
Filed:
Mar. 22, 2007
Bryan L. Olmstead, Eugene, OR (US);
Alan Shearin, Eugene, OR (US);
Bryan L. Olmstead, Eugene, OR (US);
Alan Shearin, Eugene, OR (US);
Datalogic Scanning, Inc., Eugene, OR (US);
Abstract
An imaging system (FIG.) is disclosed that has a wavelength dependent focal shift caused by longitudinal chromatic aberration in a lens assembly () that provides extended depth of field imaging due to focal shift () and increased resolution due to reduced lens system magnification. In use, multiple wavelengths of quasi-monochromatic illumination, from different wavelength LEDs () or the like, illuminate the target, either sequentially, or in parallel in conjunction with an imager () with wavelength selective (colored) filters. Images are captured with different wavelengths of illumination that have different focus positions (), either sequentially or by processing the color planes of a color imager separately. Extended depth of field, plus high resolution are achieved. Additionally, information about the range to the target can be determined by analyzing the degree of focus of the various colored images.