Optical throughput of the tempo-spatially modulated polarization interference imaging spectrometer

Ai, Jingjing; Zhang, Chunmin; Jia, Chenling; Gao, Peng

doi:10.1016/j.ijleo.2013.04.015

Optik

2013

DOI: 10.1016/j.ijleo.2013.04.015

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Optical throughput of the tempo-spatially modulated polarization interference imaging spectrometer

Jingjing Ai

Chunmin Zhang

Chenling Jia

et al.

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Cited by 4 publications

(1 citation statement)

References 15 publications

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“…In recent years, with the development of some novel dispersion elements and polarizers, there have been lots of imaging spectropolarimeters coming to the fore, and they are mainly based on the acousto-optic tunable filter (AOTF) [3], liquid-crystal tunable filter (LCTF) [4] and polarized grating [5]. In order to obtain the polarization information of the object, a polarizer is added into the optical path of a dispersive imaging spectrometer [6], computed tomography imaging spectrometer [7] and the spatially modulated interference imaging spectrometer (SMIIS) [8], respectively. This imaging polarimetry combining spectrometry can measure spectra with polarization information and thus enhance detectability of very (a) E-mail: jjaiqust@163.com (b) E-mail: phwangxia@163.com low contrast objects.…”

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confidence: 99%

Modified Sagnac imaging spectropolarimeter for full linear Stokes parameters

Gao

Guo

et al. 2019

EPL

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A modified Sagnac imaging spectropolarimeter is conceptually described. It consists of a spectral-polarimetric modulator, a modified Sagnac interferometer with large optical path difference, and a CCD camera. This design modulates the Stokes components of the input light into different wave numbers and obtains the modulated interferogram in snapshot mode, and the spectra of the Stokes components can be separated and demodulated from the interferogram. The performance of the system is demonstrated through a numerical simulation, and a novel method is proposed to detect the polarization parameters including the degree of polarization and polarization direction for eliminating the aliasing effects between linear Stokes parameters. Compared with the existing imaging spectrometers, the modified Sagnac imaging spectropolarimeter can acquire one-dimensional spatial information and its full linear spectropolarimetric information in one exposure, and some other spatial information can be obtained by push-broom mode.

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mentioning

confidence: 99%

Modified Sagnac imaging spectropolarimeter for full linear Stokes parameters

Gao

Guo

et al. 2019

EPL

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Novel “quasi-Bayer” micro-polarizer patterns for the division-of-focal-plane polarimeters

Deng

Jin

Zhao

et al. 2017

Optik

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Analysis of the clear aperture of Savart plates in polarization interference imaging spectrometer

Li¹,

Zhang²,

Wei³

et al. 2015

Acta Phys. Sin.

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The principle of beam splitting of interference imaging spectrometer based on Savart plates is presented. The propagation track of light wave in crystal and the exit aperture is analysed by combining wave normal-tracing method with ray-tracing method at random incidence angle and azimuth angle. The relationship among exit aperture, incident angle, incident position and azimuth angle is deduced in detail. The requirements that the propagation track of light remains in Savart plates and would not exit from the top surface, bottom surface and side are discussed in detail. The area and the position of exit aperture are simulated by computer, which proves the correctness of the deduction for normal incidence of light. It is shown that the lateral shear of single Savart plate restricts the boundary of clear aperture, and the area of the clear aperture is only 85.73% against the total incident surface. The parameter of experimental prototype is introduced and the clear aperture is in detail analysed and discussed by the method mentioned above. The results show that the accurate and the approximate values of exit aperture area of experimental prototype are greatly different, and the position of exit aperture are shifted into the lower right, which may reduce the image quality and even cannot generate the double-beam interference fringes in some specific areas. The effective clear aperture as a function of azimuth angle is also presented. It shows that the used clear aperture area is between 0.8005 and 0.8547 while changes from 0 to 2, in order to match the conditions that the value of area availability decreases to 0.6976 when the light always propagates inside the Savart plates. The article shows that the change of clear aperture caused by crystal birefringence phenomenon cannot be ignored when selecting the instrument aperture stop and parameter of interference imaging spectrometer. The clear aperture of the two beams, o-light and e-light, which propagate in Savart plates should be calculated respectively and then they are used to determine the last clear apertures of plates. This study provides a theoretical and practical guidance for study, design, modulation, experiment and engineering of interference imaging spectrometers.

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Optical throughput of the tempo-spatially modulated polarization interference imaging spectrometer

Cited by 4 publications

References 15 publications

Modified Sagnac imaging spectropolarimeter for full linear Stokes parameters

Modified Sagnac imaging spectropolarimeter for full linear Stokes parameters

Novel “quasi-Bayer” micro-polarizer patterns for the division-of-focal-plane polarimeters

Analysis of the clear aperture of Savart plates in polarization interference imaging spectrometer

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