Abstract

A Fourier transform spectrometer, using two common-path interferometers^1,2 and a two-dimensional CCD array detector, is used to obtain medium resolution spectra. A channelled, FourierFraunhofer hologram is produced from the sheared images of the source. The aliasing associated with high resolution, broadband spectra has been unravelled without the use of narrow-band filters. The second orthogonally oriented ring interferometer sorts the normally overlapping orders formed when the interference pattern is undersampled. Optical spectra taken by using this device will be shown.

© 1992 Optical Society of America