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:
May. 29, 2007
Filed:
Mar. 06, 2006
Igor Vinogradov, Bay Shore, NY (US);
Vladimir Gurevich, Stony Brook, NY (US);
David Tsi Shi, Stony Brook, NY (US);
Dariusz J. Madej, Shoreham, NY (US);
Mehul M. Patel, Fort Salonga, NY (US);
Edward Barkan, Miller Place, NY (US);
Heng (Jade) Zhang, Holbrook, NY (US);
Igor Vinogradov, Bay Shore, NY (US);
Vladimir Gurevich, Stony Brook, NY (US);
David Tsi Shi, Stony Brook, NY (US);
Dariusz J. Madej, Shoreham, NY (US);
Mehul M. Patel, Fort Salonga, NY (US);
Edward Barkan, Miller Place, NY (US);
Heng (Jade) Zhang, Holbrook, NY (US);
Symbol Technologies, Inc., Holtsville, NY (US);
Abstract
The combination of a rooftop optical element and a soft edge aperture stop, as well as the introduction of a negative spherical aberration in a positive focusing lens, improve working distance and depth of focus in both moving beam and imaging readers for electro-optically reading indicia such as bar code symbols, especially for close-in symbols, and moreover tend to reduce undesirable light intensity modulation in the beam profile thereby improving reader performance.