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. 16, 2014
Filed:
Nov. 23, 2009
Susan Hunter, Fort Collins, CO (US);
Charles D. Hoke, Menlo Park, CA (US);
Ramakrishna Kakarala, Santa Clara, CA (US);
John S. Wenstrand, Menlo Park, CA (US);
Susan Hunter, Fort Collins, CO (US);
Charles D. Hoke, Menlo Park, CA (US);
Ramakrishna Kakarala, Santa Clara, CA (US);
John S. Wenstrand, Menlo Park, CA (US);
Avago Technologies General IP (Singapore) Pte. Ltd., Singapore, SG;
Abstract
Two or more spatial filters are used in determining velocity based on speckle translation. A light source may be turned on, turned off, or both for a variable amount of time during operation. The velocity may then be determined with trend identification, correlation, recursive frequency estimation, or measurement bandwidth variation. A confidence level may also be calculated for the measured velocity, and the measured velocity reported or used only when the calculated confidence level meets or exceeds a given value.