We propose a new class of aperture-coded spectrometer that is optimized for the spectral characterization of diffuse sources. The instrument achieves high throughput and high spectral resolution by replacing the slit of conventional dispersive spectrometers with a more complicated spatial filter. We develop a general mathematical framework for deriving the required aperture codes and discuss several appealing code families. Experimental results validate the performance of the instrument.
Image Enhancement/instrumentation , Image Interpretation, Computer-Assisted/methods , Refractometry/instrumentation , Spectrum Analysis/instrumentation , Computer-Aided Design , Equipment Design , Equipment Failure Analysis , Image Enhancement/methods , Information Storage and Retrieval/methods , Refractometry/methods , Reproducibility of Results , Sensitivity and Specificity , Spectrum Analysis/methods
We describe a reference structure based sensor system for tracking the motion of an object. The reference structure is designed to implement a Hadamard transformation over a range of angular perspectives. We implemented a reference structure with an angular resolution of 5(o) and a field of view of 40(o).
We describe a sensor system based on 3D 'reference structures' which implements a mapping from a 3D source volume on to a 2D sensor plane. The reference structure used here is a random three dimensional distribution of polystyrene beads. We show how this bead structure spatially segments the source volume and present some simple experimental results of 2D and 3D imaging.
