Chromatic dispersion shear image surface interference hyper spectrum imaging device and method
An imaging device and hyperspectral technology, which is applied in the field of optical target detection, can solve the problems of not being able to select materials, affecting the imaging quality of the instrument, etc., and achieve the effects of simple and practical method, high target resolution, and improved spectral resolution.
Active Publication Date: 2013-04-24
NANJING UNIV OF SCI & TECH
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The invention provides a chromatic dispersion shear image surface interference hyper spectrum imaging device and a method. The chromatic dispersion shear image surface interference hyper spectrum imaging device comprises a front-placed optical system, an Sagnac chromatic dispersion shear beam splitting system, an imaging system and a signal processing system, wherein the front-placed optical system, the Sagnac chromatic dispersion shear beam splitting system, the imaging system and the signal processing system are placed in sequence along a light path direction. Incident light from each target point enters the front-placed optical system, a target view field is confirmed, stray light is eliminated, and collimated light beams are formed. The collimated light beams enter the Sagnac chromatic dispersion shear beam splitting system, are sheared into two transversely and form two beams of light with the shearing distance changing with the wave number. The two beams of light enter the imaging system, and a target image carrying with interference information is obtained on a detector target surface at an imaging objective lens back focal plane position. A detection target is pushed and swept so as to obtain the interference information of each target point under different optical path differences. The signal processing system conducts fourier transformation to the interference information so as to obtain spectral information of each target point and two-dimensional image information of each spectrum segment. The chromatic dispersion shear image surface interference hyper spectrum imaging method has the advantages of a hyper-spectrum spectral resolution ratio, a high light quantity, a high target resolution ratio and the like.
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