18 November 2014 Multiscale snapshot imaging spectrometer with large FOV and fast speed
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A novel snapshot imaging spectrometer with large field-of-view (FOV) up to 100° is achieved by taking the advantages of a multiscale fore-optics and a compact Offner imaging spectrograph. Based on the diffraction imaging theory, the multiscale fore-optics composed of a monocentric spherical lens and multi-channel microlens array is designed, over which panchromatic images with small FOV are of uniform image quality. And identical imaging spectrographs with a dimension less than 30 cubic millimeters and with a high spectral resolution of about 2nm are designed correspondingly. The presented imaging spectrometer works at the visible wavelength range which is from 400nm to 780nm. It is of a fast speed about F/2.4 and a compact configuration of only 200mm×300mm×300mm in dimension. But the smile and keystone distortions are negligible.
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Yiqun Ji, Yiqun Ji, Jose Sasian, Jose Sasian, Yuheng Chen, Yuheng Chen, Jiankang Zhou, Jiankang Zhou, "Multiscale snapshot imaging spectrometer with large FOV and fast speed ", Proc. SPIE 9299, International Symposium on Optoelectronic Technology and Application 2014: Optical Remote Sensing Technology and Applications, 92990G (18 November 2014); doi: 10.1117/12.2070927; https://doi.org/10.1117/12.2070927

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