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, 2001
Filed:
Aug. 16, 1999
Applicant:
Inventors:
Ansgar Brock, San Diego, CA (US);
Nestor Rodriguez, Berkeley, CA (US);
Richard N. Zare, Stanford, CA (US);
Assignee:
Board of Trustees of the Leland Stanford Junior University, Stanford, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01J 4/940 ;
U.S. Cl.
CPC ...
H01J 4/940 ;
Abstract
An ion beam supplied from a source is modulated so that ions at a constant flux is passed during on periods or portions thereof and are deflected or stopped during off periods according to a binary sequence in order to encode the ion beam with phase information of the sequence. The binary sequence is such that ions released during two consecutive on periods overlap before reaching a detector, thereby increasing the duty-cycle. The detector output signal is demodulated using the phase information of the binary sequence to recover an ion mass spectrum.