The optical design of two Cassegrain-type telescopes of 1200- and 2500-mm primary mirrors has been studied by wobbling subreflectors to obtain differential measurements in wavelengths ranging from 300 microns to 2 mm of the spectrum. Wide chopping angles in the sky have been reached in spite of the large apertures and high secondary magnifications. Diffraction-limited performances are maintained by tilting the secondary mirror around the primary focus.
New far infrared and millimetric telescopes for differential measurements with a large chopping angle in the sky / DE PETRIS, Marco; Massimo, Gervasi; Fabrizio, Liberati. - In: APPLIED OPTICS. - ISSN 0003-6935. - STAMPA. - 28:(1989), p. 1785. [10.1364/AO.28.001785]
New far infrared and millimetric telescopes for differential measurements with a large chopping angle in the sky
DE PETRIS, Marco;
1989
Abstract
The optical design of two Cassegrain-type telescopes of 1200- and 2500-mm primary mirrors has been studied by wobbling subreflectors to obtain differential measurements in wavelengths ranging from 300 microns to 2 mm of the spectrum. Wide chopping angles in the sky have been reached in spite of the large apertures and high secondary magnifications. Diffraction-limited performances are maintained by tilting the secondary mirror around the primary focus.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
