Patent ID: 7430044
Filing Date: 2008-09-30
Classification: G01J,G01N

Abstract:
1. An encoder spectrograph for detecting one or more spectral components from a source, the spectrograph comprising: first optics adapted to collect and focus radiation from a source to form a dispersed image along an encoding axis, the dispersed image characteristic of the spectral components of the source, wherein the first optics comprise a diffraction grating that disperses the radiation into at least two spectral components each having an annular-shaped intercept with a respective radiation filter on a modulator; a spatial radiation modulator having at least two radiation filters located at different positions along the encoding axis, the radiation filters configured to modulate the spectral components with different modulation functions to provide an encoded beam comprising at least two encoded spectral components; a detector; second optics adapted to collect and direct the encoded beam onto the detector, causing the detector to provide an output corresponding to the encoded beam; and a processor for analyzing the output from the detector to determine the spectral components modulated in the encoded beam.