Patent ID: 7781736
Filing Date: 2010-08-24
Classification: G01J,G01N

Abstract:
1. An apparatus for analyzing, identifying, or imaging a target, said apparatus comprising: first and second lasers having tunable frequencies, said first laser to produce a first output beam and said second laser to produce a second output beam, said first output beam and said second output beam having different frequencies, wherein a first portion of said first output beam and a first portion of said second output beam are to produce a first composite output beam; a source of CW signals in the range of frequencies from 100 GHz to over 2 THz including a first photoconductive switch activated by said first composite output beam; a radiative element for causing said CW signals to be substantially simultaneously focused on or through said target; a first phase shifting element positioned to receive a second portion of said first output beam to controllably adjust the phase of said second portion of said first output beam with respect to a second portion of said second output beam; an optical element to produce a second composite output beam from said second portion of said first output beam and said second portion of said second output beam, wherein said second composite output beam has an adjustable phase difference with respect to said first composite output beam; and a detector for,