Circular Wedge Large Aperture Field Widened Interferometer
Original Publication Date: 1980-Nov-01
Included in the Prior Art Database: 2005-Feb-14
In the classical Michelson interferometer, the optical path length is varied by movement of one mirror' In a field widened interferometer, the path difference is held constant and the apparent mirror position is changed by inserting more or less optical material into one of the beam paths of the interferometer. One known way to do this is to use a linear optical wedge mounted for movement such that the data is collected during a forward scan. After such scan, the wedge is returned to its original position for another scan, and during the retrace, no data is collected.