M. Lacolle, H. Sagberg, D. Lee, O. Solgaard, I. Johansen, O. Løvhaugen, A. Sudbø
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A micro-mechanical fresnel lens for spectral filtering
In this paper, there has been a recent interest for MEMS-based adjustable or re-configurable diffraction filters. Reconfigurable diffraction filters are well adapted to NIR spectroscopy, with applications such as identification of polymers and detection of carbon monoxide in air. A cost-effective implementation of a NIR spectrometer was proposed by Lovhaugen. The system uses a focusing static Diffractive Optical Element (DOE). The set-up minimizes the number of elements in the system, as no lens is needed
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