Optical design of Lyman/FUSEThe optical system for the proposed Lyman/Far UV Spectroscopic Explorer (FUSE) orbiting observatory is described and illustrated with drawings and graphs of predicted performance. The system comprises (1) an FUV channel based on a 1.84-m-diameter Rowland circle spectrograph with five high-density modified ellipsiodal near-normal-incidence gratings and an array of four MAMA detectors; (2) an EUV channel with ellipsoidal mirror, planar varied-line-space grating, microchannel-plate array, and wedge-and-strip anode detector; (3) a 70-cm Wolter II glancing-incidence telescope; and (4) a CCD-detector fine-error sensor to provide accurate pointing (within 200 marcsec rms). The resolving powers of the spectrographs are 30,000 in the FUV and 300-600 (wavelength-dependent) in the EUV.
Document ID
19910045065
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Content, D. A. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Davila, P. M. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Osantowski, J. F. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Saha, T. T. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Wilson, M. E. (NASA Goddard Space Flight Center Greenbelt, MD, United States)