Linear stokes imaging spectropolarimeter based on the static polarization interference imaging spectrometer

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• 作者：Naicheng Quan ; Chunmin Zhang ; ^{zcm@mail.xjtu.edu.cn} ; Tingyu Yan ; Qiwei Li ; Ruiru Gao ; Tingkui Mu
• 关键词：Interference imaging spectropolarimeter ; Fourier-transform spectrometer ; Savart polariscope
• 刊名：Optics Communications
• 出版年：2017
• 出版时间：15 May 2017
• 年：2017
• 卷：391
• 期：Complete
• 页码：30-36
• 全文大小：894 K
• 卷排序：391

文摘

Imaging spectropolarimeter (ISP) is a novel instrument that integrates the functions of camera, spectrometer and polarimeter. It can acquire the image, spectrum and polarization data of a target simultaneously ISP provides richer information for target detection and identification. Stokes imaging spectropolarimetry is usually employed for ground, airborne and spaceborne remote sensing. ISPs based on Fourier-transform spectrometer have been a hot research topic for several years The Fourier-transform spectrometer has several advantages for spectral detection, such as high optical throughput and high spatial resolution. Several productive Fourier-transform spectropolarimeters have been reported One uses the channeled spectropolarimetric technique. Such sensor can determine four Stokes parameters from a single interferogram. Since the recorded interferogram contains more than three channels, the spectral resolution of each spectral Stokes parameters is lower than that of the spectrometer Another attractive method uses achromatic wave-plates as the polarization modulator by combination with time-division or aperture division technique. These sensors can overcome the drawbacks of the channeled spectropolarimetric technique However, the high-precision polarization modulator in such instrument still causes high cost and the limitation of spectral coverage. Recent progress in the Fourier transform imaging spectrometers based on birefringent interferometers has remarkably enhanced the performance of the ISPs, such as static polarization interference imaging spectrometer (SPIIS) based on Savart polariscope. It has the advantages of ultra-compact size with common-path configuration and high optical throughput However, such instrument can only acquire the linearly polarized component of S1 or S2. Since very little circular polarization can be expected in most passive imaging scenarios, obtaining spectral dependence of linear Stokes parameters would satisfy a number of applications In this work, we present a linearly Stokes imaging spectropolarimeter based on the static polarization interference imaging spectrometer (SPIIS). By incorporating a rotating Glan-Taylor prism in front of the SPIIS, the spectral linear Stokes parameters can be detected As far as we know, this is the first report of linearly Stokes imaging spectropolarimeter based on the SPIIS. The principle of the instrument is demonstrated by numerical simulation. The orientation of the rotatable Glan-Taylor prism is set to(0°, 45°, 90°) to minimize the condition number of the system matrix. The experimental results are shown to yield an accuracy better than 3.6% over most the broadband of 480~960nm Compare with the previous ISPs, the polarized spectra are separated by time-division technique without spatial aliasing, both broad-band and narrow-band spectrum can be detected. Besides, it can be used in ultra-broad spectral coverage with the advantages of low cost, ultra-compact size with simpler common-path configuration