Patent ID: 7633633

Claim:
A method for determining the position of an object, comprising: providing at least two electromagnetic (EM) beams, said at least two EM beams being provided from two different EM sources; dispersing said at least two EM beams, respectively, into a scanning space by frequency; retro-reflecting at least a portion of said respective dispersed beams off an object positioned within said scanning space; determining, in response to frequencies associated with said retro-reflected beams, respective angular positions of said object; and triangulating coordinates of said object using two or more of said respective angular positions; wherein said at least two EM beams are elliptical shaped EM beams so as to improve tracking range of said retro-reflective object along a direction orthogonal to said scanning space, wherein the elliptical shaped EM beams are EM beams that have an elliptical shaped beam spot.