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:
Apr. 24, 2018
Filed:
Feb. 14, 2014
Palo Alto Research Center Incorporated, Palo Alto, CA (US);
Joerg Martini, San Francisco, CA (US);
Marshall W. Bern, San Carlos, CA (US);
Noble M. Johnson, Menlo Park, CA (US);
Peter Kiesel, Palo Alto, CA (US);
Doron Kletter, San Mateo, CA (US);
Bowen Cheng, Atherton, CA (US);
Michael I. Recht, Mountain View, CA (US);
Palo Alto Research Center Incorporated, Palo Alto, CA (US);
Abstract
Spatially modulated light emanating from an object moving along a flow path is used to determine various object characteristics including object length along the flow direction. Light emanating from at least one object moving along in a flow path along a flow direction of a spatial filter is sensed. The intensity of the sensed light is time modulated according to features of the spatial filter. A time varying electrical signal is generated which includes a plurality of pulses in response to the sensed light. Pulse widths of at least some of the pulses are measured at a fraction of a local extremum of the pulses. The length of the object along the flow direction is determined based on the measured pulse widths.