Abstract: Monochromatic imaging instrumentation has beendeveloped that uses narrow-band (12 angstrom FWHP)interference filters or plane reflection gratings for2-D imaging and imaging spectrograph applications. Bychanging the optics in front of the filter or grating,the field of view of the instruments can be varied from180$DGR (all-sky) to 6$DGR (narrow-field). In the caseof the 2-D monochromatic imager, the 12 mm diameterfiltered image is formed at approximately f/1 on theinput photocathode of an intensified CCD camera (380$MUL 488 pixels). Regardless of the field of view ofthe instrument, none of the rays passing through thefilter exceeds 4.5$DGR to the filter normal. In thespectrograph mode, a slit is placed on the field lens,at the focus of the objective lens, and the 4'interference filter is replaced with a reflectiongrating. The spectrum is imaged at f/1 onto the samedetector as described above with the spatial dimension380 pixels and the wavelength dimension 488 pixels. Thesensitivities of the systems are approximately 50 - 100R s (S/N approximately 2). Examples of data taken withboth of these instruments include detection and mappingof Jupiter's sodium magneto-nebula and stable auroralred (SAR) arcs in the terrestrial ionosphere. !2
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