Computer Science – Performance
Scientific paper
Jan 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002spie.4483..279l&link_type=abstract
Proc. SPIE Vol. 4483, p. 279-286, Earth Observing Systems VI, William L. Barnes; Ed.
Computer Science
Performance
Scientific paper
The development in the past few years of all-mirror telescopes has opened a wide new range of possibilities to instrument designers, with features like high compactness and outstanding optical quality over wide fields of view. However, this design imposes specific constraints on the focal plane: it can no longer accommodate glass beamsplitters and its size increases with the field of view. New CCD detectors with multiple long lines are well-suited to this application, but require a new filters strategy. This paper will detail what ours was in the particular case of a 78-mm long, 4-channel CCD. The choice of the stripe- filters concept was made on the basis of a performance versus cost analysis. Two kinds of assemblies were retained at this stage. The components manufactured by SAGEM-REOSC PRODUCTS in an initial development phase showed good spectral performance with high rejection over a very wide range of wavelengths. Some topics like local defects and straylight needed specific work. The paper focuses on the impact of the defects on the performances and the way they have been dealt with, and on the straylight design strategy with the results obtained in the different cases. In particular, it shows how the detector's design can be partially driven by the straylight requirements.
Gimenez Thierry
Laubier David
Mercier-Ythier Renaud
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