Patent ID: 7773229
Filing Date: 2010-08-10
Classification: G01J,G01P,G01S

Abstract:
1. A Doppler Asymmetric Spatial Heterodyne (DASH) spectrometer, comprising: an input aperture (A) for receiving an input light; a collimating lens for collimating the input light into a collimated light; a beamsplitter for splitting the collimated light into a first optical path and into a second optical path, wherein the first optical path comprises a first grating positioned to reflect the first collimated light portion back to the beamsplitter as a first optical path light wavefront, and the second optical path comprises a second grating positioned to reflect the second collimated light portion back to the beamsplitter as a second optical path light wavefront, and wherein the second grating is positioned at a greater distance than the first grating with respect to the beamsplitter to produce an offset in a light wavefront path distance between the first and second optical path wavefronts; an output optics section comprising a detector; and whereby the beamsplitter recombines the first and second optical path light wavefronts having the path distance offset into an interference wavefront in the output optics section to form an interference image that includes a plurality of phase points of a heterodyned interferogram measured simultaneously over the path distance offset, and the detector receives the interference image and outputs an interference image pattern.