Patent ID: 6519040
Filing Date: 2003-02-11
Classification: G01J

Abstract:
An imaging system for Fourier transform spectroscopy comprising:an image generating apparatus generating object light along a first optical light path; a plurality of polarizing devices placed in the first optical light path; at least one birefringent device placed in the first optical light path between the plurality of polarizing devices; means for causing change in the optical path difference suffered by light of the first optical light path incident upon the at least one birefringent device; an image recording apparatus in the first optical light path receptive of the object light; wherein the image generating apparatus generates a real image of a field in the same plane or planes as fringes generated by the at least one birefringent device; and a second optical light path perpendicular to the first optical light path wherein the first and second optical light paths have a common image generating apparatus and the image recording apparatus records complementary images.