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:
Oct. 09, 2007
Filed:
Feb. 28, 2003
Richard Earl Haven, Sunnyvale, CA (US);
David James Anvar, Sunnyvale, CA (US);
Julie Elizabeth Fouquet, Portola Valley, CA (US);
John Stewart Wenstrand, Menlo Park, CA (US);
Richard Earl Haven, Sunnyvale, CA (US);
David James Anvar, Sunnyvale, CA (US);
Julie Elizabeth Fouquet, Portola Valley, CA (US);
John Stewart Wenstrand, Menlo Park, CA (US);
Avago Technologies General IP Pte Ltd, Singapore, SG;
Abstract
Methods and apparatus for pupil detection are described. First light is emitted from a first light source at a first illumination angle relative to the axis of a detector. Second light is emitted from a second light source at a second illumination angle relative to the axis. The first light and the second light can have substantially equal intensities. The second illumination angle is greater than the first illumination angle. Reflected first light and reflected second light are received at the detector. The difference between the reflected first light and the reflected second light can be determined. The difference can be used to detect the pupils of a subject's eyes.