A non-continuous wavelength scanning strategy for electrically tunable liquid-crystal hyperspectral imaging array

Traditional mechanically tunable imaging spectrometry, including those based on MEMS technology, can only obtain continuous spectral image data in a fixed spectral order, which was restricted by the moving mechanism of the mechanical device. But spectrum absorption peakof materials is not continuous, especially in hyperspectral scale. To overcome such shortages, a smart spectral imaging detection method based on the integration of electrically tunable liquid-crystal (LC) Fabry-Perot (FP) microstructure array and a non-continuous wavelength choosing strategy to operation the device are proposed. With a tunable LC-FP array composed by many working units arranging in two dimensions, the device can image in hundreds of spectral bands simultaneity within milliseconds in a calibrated system, and making correct detection for certain objects in one shot.

[1]  H. Macleod,et al.  Thin-Film Optical Filters , 1969 .

[2]  K. B. Hansen,et al.  Electro-optical multichannel spectrometer for transient resonance Raman and absorption spectroscopy. , 1979, The Review of scientific instruments.

[3]  W. Flygare,et al.  Fabry–Perot cavity pulsed Fourier transform microwave spectrometer with a pulsed nozzle particle source , 1981 .

[4]  David M. Coleman,et al.  Determination of Species Sampled by an Analytical Spark Discharge Using Time- and Spatially Resolved (Anomalous Dispersion) “Hook” Spectroscopy , 1987 .

[5]  Takashi Kurokawa,et al.  Liquid crystal devices for optical communication and information processing systems , 1993 .

[6]  Takashi Kurokawa,et al.  Tunable liquid-crystal Fabry-Perot interferometer filter for wavelength-division multiplexing communication systems , 1993 .

[7]  J. R. Pedrazzani,et al.  Fiber grating optical spectrum analyzer tap , 1997 .

[8]  S. J. Sutley,et al.  USGS Digital Spectral Library splib05a , 2003 .

[9]  P Tournois,et al.  Time-domain interferometry for direct electric-field reconstruction by use of an acousto-optic programmable filter and a two-photon detector. , 2003, Optics letters.

[10]  Alan Scott,et al.  Tunable etalons and other applications of multi-application low-voltage piezoelectric instrument control electronics (MALICE) , 2004, SPIE Astronomical Telescopes + Instrumentation.

[11]  P. Oswald,et al.  Nematic and Cholesteric Liquid Crystals: Concepts and Physical Properties Illustrated by Experiments , 2005 .

[12]  L. Faraone,et al.  A monolithically integrated HgCdTe short-wavelength infrared photodetector and micro-electro-mechanical systems-based optical filter , 2005 .

[13]  Tianxu Zhang,et al.  Smart hyperspectral imaging detection based on electrically tunable liquid-crystal Fabry-Perot microstructure array , 2009, Optical Engineering + Applications.