Physics – Optics
Scientific paper
Dec 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981ssrv...29..455w&link_type=abstract
(Schweizerische Naturforschende Gesellschaft and Eidgenoesische Technische Hochschule Zuerich, Conference on Solar Physics from
Physics
Optics
3
Geometrical Optics, Grazing Incidence, Grist (Telescope), Solar Instruments, Ultraviolet Spectrometers, X Ray Spectroscopy, Focal Plane Devices, Solar Spectra, Spectral Resolution, Structural Design
Scientific paper
A spectrometer design is presented, with which it is possible to cover the entire wavelength range of GRIST by one focal plane instrument. The design is based on an off-plane grating mounting, whose object and spectral images are located out of the plane perpendicular to the grooves in the mounting. The absolute diffraction-efficiency of a grating in an off-plane mounting may exceed that in a classical in-plane mounting by a factor of more than ten. By combining this plane grating with other optical elements results in an arrangement with satisfactory instrumental transmission and the possibility for correcting optical aberrations. The spectral image can be made stigmatic over the entire wavelength range in a field of view with sufficiently large dimensions. Optically, it is possible to observe in the order of 100,000 image elements simultaneously for wavelengths below 30 nm.
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