Large Displacement Micro-Lamellar Grating Interferometer

摘要

A micro-lamellar grating interferometer for deriving the spectrum of an incident beam from a scene of interest from a generated interferogram is disclosed with a method for using the same. The interferometer comprises a lamellar grating defined by two interleaved reflective mirror set; a first stationary set of electromagnetically reflective elements and a second moveable set of electromagnetically reflective elements. The first and second set of electromagnetically reflective elements are referred to as mirror elements herein. The second mirror element set is disposed on a moveable platform supported by flexures that are driven with a high stiffness magnetic, thermal or piezoelectric actuator designed have a predetermined vertical displacement that is perpendicular to the first mirror set.