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:
Mar. 16, 2010
Filed:
Apr. 05, 2006
Lieven Lambert Amir Vosteen, Den Haag, NL;
Hendrik Bokhove, Gouda, NL;
Lieven Lambert Amir Vosteen, Den Haag, NL;
Hendrik Bokhove, Gouda, NL;
Abstract
At least three incoming light beams (-) are combined partly combined into a null beam and partly into fringe tracking beams. The relative phase difference between the incoming beams (-) is controlled so that a phase relationship between in the null beam corresponds to destructive interference of the main beam components in the null beam. In the fringe tracker beams this leads at least partly to constructive interference between the main beam components, with an intensity that depends on the phase differences. Measurements of the intensities of the fringe tracker beams are used to control the relative phase differences of the incoming beams (-) to realize destructive interference of the main components in the null beam. To form the null beam successively more of the light beams are combined into the null beam in a series of beam combiners (). Part of the light is split from the incoming light beams into the fringe tracking beams, said splitting occurring at least partly between a start and end of said series () or at said start.