Technique for narrow-band imaging in the far ultraviolet based on aberration-corrected holographic gratings

We have developed a new family of imaging spectrometer designs that combine the imaging power of two-element telescopes with the aberration control of first-generation holographic gratings. The resulting optical designs provi de high spatial resolution over modest fields of view at selectable wavelen gths. These all-reflective designs are particularly suited for narrow-band imaging below 1050 Angstrom the wavelength below which there are no transmi tting materials in the W. We have developed designs to efficiently map the spatial distribution of W-emitting material. This mapping capability is abs ent in current and future astronomical instruments but is crucial to the un derstanding of the nature of a variety of astrophysical phenomena. Although our examples focus on W wavelengths, the design concept is (C) 2001 Optica l Society of America.