Patent ID: 7551295
Filing Date: 2009-06-23
Classification: G01B,G01D,G01H,G01L,H04R

Abstract:
1. An apparatus comprising: a beamsplitter having a cavity, wherein said beamsplitter receives optical energy and distributes it into a first beam and a second beam, and wherein said second beam transits said beamsplitter on a first path that has a first intra-cavity path length; a director, wherein said director receives one of said first beam and said second beam and provides a third beam, wherein said third beam comprises at least a portion of the optical energy of the received one of said first beam and second beam, and wherein at least a portion of said third beam transits said cavity on a second path having a second intra-cavity path length, and further wherein the first path and the second path are different paths; a first detector, wherein said first detector generates an electrical signal based on the other one of said first beam and said second beam; and a second detector, wherein said second detector generates an electrical signal based on said third beam; wherein said beamsplitter is physically adapted to modulate a signal onto said third beam, and wherein said signal is based on an environmental stimulus.