A novel type of DMD-based Hadamard transform spectral imager is introduced. Taking the 7-order S-matrix as an example for discussion, the present paper develops an improved design of Hadamard encoding mask, which makes the dispersed spectrum of all pixels to be encoded by seven elements strictly. A correcting method for the recovered spectral images is proposed, and eventually 6 high-quality spectral images are obtained when Hadamard transform spectral imager operates based on 7-order S-matrix. Similarly, if the spectral imager operates based on n-order S-matrix, n-1 spectral images can be obtained. The experimental results show that the improved design and the correction method are feasible and effective.
1.East China Jiaotong Univ, Sch Informat Engn, Nanchang 330013, Peoples R China 2.East China Jiaotong Univ, Sch Software, Nanchang 330013, Peoples R China 3.Chinese Acad Sci, Xian Inst Opt & Precis Mech, Key Lab Spectral Imaging Tech, Xian 710119, Peoples R China 4.Chinese Acad Sci, Inst Opt & Elect, Key Lab Beam Control, Chengdu 610209, Peoples R China
Xu Jun,Xie Cheng-wang,Liu Hai-wen,et al. The Improved Design of Encoding Mask and the Correcting Method for Recovered Spectral Images in Hadamard Transform Spectral Imager Based on DMD[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS,2013,33(5):1419-1423.