AN IMAGING SPECTROMETER FOR ASTRONOMY

We present a spectrometer with cross dispersion, which can cover the spectral range of grating with the high Fabry-Perot resolution simultaneously for different points of a two-dimensional source. It is in "integral field" (according to Courtes 1987) device with a multi-lens array, which can isolate contiguous points of the image. It is multichannel and integral spectral (according to Chabbal 1958), as it obtains all the spectral elements during a scan, step by step, of only one interference order of the Fabry-Perot. For 40-channel scanning, we obtain simultaneously 400 spectra with spectral resolution R approximately 30,000 and a 200 nm range in the visible for a 2,000 x 2,000 pixel receptor.