Patent ID: 8451452
Filing Date: 2013-05-28
Classification: A61B,G01B

Abstract:
1. A method for depth resolved wavefront sensing of an optical beam reflected or transmitted by an object, the method comprising: using a first splitter to produce an incident optical object beam and a reference beam from an optical source, wherein the incident object beam is reflected or transmitted by the object to produce an emergent optical beam, producing multiple object beams by traversing a multiple beam device by exactly one of the emergent object beam, and the incident object beam, to produce multiple object beams from the emergent object beam, and sending the multiple object beams via a two-output second splitter, to a reading block, wherein the reference beam is routed via the second splitter towards the reading block, and where the reading block has several pixels in transversal section; and processing the interference on the pixels of the reading block between the multiple object beams and the reference beam to locate the lateral position of centroids of maxima of interference signal on the reading block for each beam in the set of multiple object beams versus the optical path difference measured as a difference of length between object path measured from the first splitter to the object and back to the second splitter, and reference path length, measured from the first splitter up to the second splitter.