光谱学与光谱分析 |
|
|
|
|
|
Analysis of Influence of Pushroom Erros on The Data Reconstruction of Computational Imaging Spectrometer |
WANG Jian-wei, PEI Lin-lin, LIU Yang-yang, Lü Qun-bo |
Academy of Opto-electronis, Chinese Academy of Sciences, Beijing 100094, China |
|
|
Abstract The technology of computational spectral imaging changes the traditional imaging modalities by introducing a coded aperture in the optical path to achieve transformation of the targets spectral imformation, then we can get the spectral data cube by reverse transform. This paper introduces the principle of a push-broom imaging coded aperture computational spectral imager. In practical applications, the matching error between the push speed and the frame rate can affect the accuracy of the spectral data reconstruction. The error terms are deduced based on the model of pushroom, the influences of matching errors to the spectral data reconstruction are anlyzed. And the second spectra derivative and strehl ratio are introduced as the evaluation parameters to, respectively, evaluate the reconstructed spectral and spatial image in the data simulation analysis. It showed that, when the accumulated error of a complete set of data is more than one pixel, the shading dramaticly area’s reconstructed results are relatively poor, but the relatively homogeneous regions are affected small; when cumulative error does not exceed half pixel, strehlretio of each channel were above 0.9, and the lower of the spectral energy, the channels strehl ratio smaller, so the more the ranks of the coding template, the higher the platform’s stability required.
|
Received: 2014-08-12
Accepted: 2014-12-08
|
|
Corresponding Authors:
WANG Jian-wei
E-mail: wjw@aoe.ac.cn
|
|
[1] Wolfe W L. Introduction to Imaging Spectrometers. SPIE Optical Engineering Press, 1997. 1. [2] Gehm M E, John R, Brady D J, et al. Optics Express, 2007, 15: 14014. [3] Feller S D, GehmM E, Brady D J. Optics Express, 2007, 15: 5625. [4] Portnoy Andrew D,Gehm Michael E,Brady David J. Frontiers in Optics, OSA Technical Digest (CD) (Optical Society of America), 2006, FMB2. [5] SHAO Xiu-juan, HU Bing-liang, YAN Peng(邵秀娟,胡炳樑,闫 鹏). Infrared and Laser Engineering(红外与激光工程), 2010, 39: 963. [6] Treado P J, Morris M D. Appl. Spectrosc., 1990, 44: 1. [7] Gehm M E, McCain S T, Pitsianis N P, et al. Appl. Opt., 2006, 45: 2965. [8] Brady D J, Gehm M E. Proc. SPIE, 2006, 6246: 62460A-1. [9] Henry Arguello. Gonzalo Arce 18th Europen Signal Processing Conference Aalborg, August 23-27, 2010, 1434. [10] David Kittle, Kerkil Choi, Ashwin Wagadarikar, et al. Applied Optics, 2010, 49: 6824. |
[1] |
KONG De-ming1, 3, LI Yu-meng1, CUI Yao-yao2*, ZHANG Chun-xiang1, WANG Shu-tao1. Correction Methods of Rayleigh Scattering of Three-Dimensional Fluorescence Spectra of Spilled Oil on Sea[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2020, 40(09): 2791-2797. |
[2] |
WANG Jian-wei1, 2, ZHAO Yan1, LI Wei-yan2, PEI Lin-lin2, SUN Jian-ying2, SUN Cheng-ming2, LÜ Qun-bo2, LIU Yang-yang2. Spectrum Acquisition of Dynamic Small Objects in Uniform Background[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2019, 39(07): 2013-2017. |
[3] |
MA Yuan1,2, Lü Qun-bo1*, LIU Yang-yang1, QIAN Lu-lu1, PEI Lin-lin1 . Effect Evaluation of Optical Magnification Errors for Coded Aperture Spectrometer [J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2014, 34(11): 3157-3161. |
[4] |
LI Yun1, 2, HU Bing-liang1, WANG Shuang1, LI Ran1, SHI Da-lian1,2 . Coded Aperture Spectral Data Restoration Based on Two-Step Iterative Shrinkage/Threshold [J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2014, 34(03): 847-850. |
|
|
|
|