Physics – Optics
Scientific paper
Oct 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005apopt..44.5947l&link_type=abstract
Applied Optics IP, vol. 44, Issue 28, pp.5947-5955
Physics
Optics
Fourier Optics, Physical Optics, Far-Infrared, Infrared, Far
Scientific paper
Placement of a scatter cone at the center of the secondary of a Cassegrain telescope greatly reduces Narcissus reflection. To calculate the remaining Narcissus reflection, a time-consuming physical optics code such as GRASP8 is often used to model the effects of reflection and diffraction. Fortunately, the Cassegrain geometry is sufficiently simple that a combination of theoretical analysis and Fourier propagation can yield rapid, accurate results at submillimeter wavelengths. We compare these results with those from GRASP8 for the heterodyne instrument for the far-infrared on the Herschel Space Observatory and confirm the effectiveness of the chosen scatter cone design.
Beintema Douwe A.
Fischer Jacqueline
Lucke Robert L.
Polegre Arturo M.
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