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Proceedings Paper

Spectral features due to on-board diffusers
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Paper Abstract

The presence of structures, as observed in real spectral data from earth observing satellites, that are due to the on-board diffusers are discussed. The structures are shown to be caused by the speckles in the entrance slit of the spectrometer, created by the diffusers. A dedicated setup for the study of these spectral features will be presented together with results on different types of diffusers, i.e. surface diffusers and volume diffusers. Finally, methods to reduce the amplitude of the spectral features will be presented. It will be shown that QVD (quasi volume diffuser) and Spectralon (a volume diffuser) are far better in reducing the unwanted spectral features than an aluminum surface diffuser. Overall it can be stated that QVD is the "best" diffuser where the validity of this statement depends on the type of its use.

Paper Details

Date Published: 22 August 2005
PDF: 12 pages
Proc. SPIE 5882, Earth Observing Systems X, 588202 (22 August 2005); doi: 10.1117/12.616324
Show Author Affiliations
Hedser van Brug, TNO Science and Industry (Netherlands)
Gregory Bazalgette Courreges-Lacoste, TNO Science and Industry (Netherlands)
Jos Groote Schaarsberg, TNO Science and Industry (Netherlands)
Gerard Otter, TNO Science and Industry (Netherlands)
Umberto Del Bello, ESA ESTEC (Netherlands)
Bart Snijders, TNO Science and Industry (Netherlands)

Published in SPIE Proceedings Vol. 5882:
Earth Observing Systems X
James J. Butler, Editor(s)

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