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:
Jul. 10, 2012
Filed:
Dec. 24, 2008
Robert J. Lang, Alamo, CA (US);
Jahja I. Trisnadi, Cupertino, CA (US);
Steven Sanders, Los Altos, CA (US);
Ke-cai Zeng, Fremont, CA (US);
Robert J. Lang, Alamo, CA (US);
Jahja I. Trisnadi, Cupertino, CA (US);
Steven Sanders, Los Altos, CA (US);
Ke-Cai Zeng, Fremont, CA (US);
Cypress Semiconductor Corporation, San Jose, CA (US);
Abstract
An optical navigation sensor (ONS) is provided having a spatial frequency filter to transmit radiation at selected spatial frequencies while attenuating other, undesired frequencies and harmonics. The ONS includes a radiation source to transmit radiation toward a portion of a surface that diffusely reflects radiation incident thereon. The spatial frequency filter is disposed to receive radiation scattered from the surface, and, in one embodiment, includes a number of non-circular openings to pass radiation of at least one pre-selected frequency while attenuating other frequencies and harmonics of the pre-selected frequency.