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:
Jan. 17, 2012
Filed:
Mar. 06, 2007
Gary E. Determan, Maple Grove, MN (US);
David J. Wunderlin, New Hope, MN (US);
Gary E. Determan, Maple Grove, MN (US);
David J. Wunderlin, New Hope, MN (US);
Honeywell International Inc., Morristown, NJ (US);
Abstract
A device for detecting the presence of human skin including an illuminator source for providing an IR band at a predetermined frequency known as a blue LED. The IR band frequency ranges from about 400 nanometers (nm) to about 500 nm, and preferably from about 450 nm to about 485 nm. Most preferred is a blue LED with a frequency of about 468 nm. The band is reflected off a target and received by a sensor such as a photo detector. The value for human skin is compared to the signal detected. Other materials that have been used to spoof detectors have different values and thus are distinguished from human skin.