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22 August 2005 Spectral features due to on-board diffusers
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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.
© (2005) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Hedser van Brug, Gregory Bazalgette Courreges-Lacoste, Jos Groote Schaarsberg, Gerard Otter, Umberto Del Bello, and Bart Snijders "Spectral features due to on-board diffusers", Proc. SPIE 5882, Earth Observing Systems X, 588202 (22 August 2005);


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