Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989spie.1130..214a&link_type=abstract
IN: New technologies for astronomy; Proceedings of the Meeting, Paris, France, Apr. 25, 26, 1989 (A90-37976 16-89). Bellingham,
Astronomy and Astrophysics
Astronomy
Cameras, Image Processing, Infrared Space Observatory (Iso), Lens Design, Satellite-Borne Instruments, Aberration, Image Resolution, Optimization, Point Spread Functions, Systems Engineering
Scientific paper
The IR Space Observatory camera, 'ISOCAM', will operate at 4 K and cover the 2.5-17 micron range with two different channels. The prospective geometrical aberrations and diffraction of ISOCAM were studied on the basis of a complete ray-tracing of the system, including the f/15 Ritchey-Chretien telescope. Chromatic aberrations have been reduced through the use of Ge for the 5-17 micron range and Si for the 2.5-5 micron range. Attention is given to the possible appearance of such effects as deformation and systen ghost images. A cryocooled camera simulator was developed to test the 4 K optics by means of point-spread function measurements.
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