APPLICATIONS OF HOLOGRAPHIC GRATINGS TO 2-DIMENSIONAL SPECTROSCOPY

Calculations are presented for a set of aberration-corrected holograph ic concave gratings for possible use in space mission instruments. It is concluded that, for the visible range 0.26-1.02 mu m when detectors with a 15-mu m pixel size are used, a total field of view of similar to 1 degrees is possible at an aperture of f/7.0. For the infrared reg ions 0.9-2.5 mu m and 2.4-4.2 mu m, in which detector arrays have larg er pixel sizes of 30-40 mu m, a spatial field of view of similar to 2 degrees at f/7.0 and similar to 1.0 degrees at f/3.5 can be achieved. An exploration of spectrum lengths showed that performance starts to f all off sharply for lengths over 15 mm at a focal length of 150 mm (i. e., a spectral angular extent of similar to 6 degrees). (C) 1996 Optic al Society of America