1. Coded aperture snapshot linear-Stokes imaging spectropolarimeter.
- Author
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Chen, Zeyu, Zhang, Chunmin, Mu, Tingkui, Yan, Tingyu, Bao, Donghao, Chen, Zhengyi, and He, Yifan
- Subjects
- *
PHOTOGRAPHS , *OPTICAL apertures , *SPECTRAL imaging , *MICROMIRROR devices , *MULTISPECTRAL imaging , *CAMERAS - Abstract
In this paper, we present a coded aperture snapshot linear-Stokes imaging spectropolarimeter (CASSIS) based on a combination of coded aperture spectral imager and a division-of-focal-plane polarization camera. The CASSIS achieves aperture coding with a digital micromirror device (DMD) first, and then encodes polarization state using the polarization camera. Finally, the camera gets the coded polarization spatio-spectral image at a single snapshot. Linear-Stokes spectral images are estimated with sparsity-constrained optimization from the acquired image. The principle and feasibility are validated with simulations. It is noted that a modest peak-signal-to-noise ratio (PSNR) is recovered with a single snapshot, and higher PSNR is obtained with multiple snapshots. [ABSTRACT FROM AUTHOR]
- Published
- 2019
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