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We demonstrate a spectrometer based on multiple interference and scattering in an ordinary frosted glass featuring random structures. The probe signal disperses through the frosted glass generating wavelength-dependent speckle patterns, which are detected by a charge coupled device chip and used to reconstruct the input spectrum after calibration. We consider an underdetermined system of linear equations...
A free space miniature optical spectrometer is demonstrated by utilizing a hole array as the dispersive component. Tikhonov regularization method is used to make the reconstructed spectrum similar to the original one.
We present a novel chip-level optical spectrometer in which the transmission characteristics of a 2-dimensional variable size hole array may be used for analyzing the spectral contents of an incident beam.
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