Effects of Finite Surface on Polarization State of Thermal Emission

Liu, Fei; Shao, Xiaopeng; Xiangli, Bin; Gao, Ying; Han, Peng; Wang, Lin

doi:10.1088/0256-307x/32/11/114203

Cited by 4 publications

(1 citation statement)

References 14 publications

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“…[18] Many computational and experimental efforts are going on in parallel for achieving reliable opacities data. [1,7,[19][20][21][22][23][24][25][26][27][28][29][30][31][32] It includes a large list, but here we are giving a short introduction to some of the sources, which we have used for comparison of our results. The opacity project (OP) [33] and opacity project at Livermore (OPAL) [34] have been the early sources of opacity data for astrophysicists since the nineties, and are still used extensively for modeling various problems in stellar physics.…”

Section: Introductionmentioning

confidence: 99%

Radiative properties of matter based on quantum statistical method

et al. 2017

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We present the preliminary results of our code OPAQS (opacity calculation using quantum statistical model) that is based on the self consistent Hartree-Fock-Slater model for the average atom. The code is capable of performing robust calculations of average charge state, frequency-dependent and mean opacities. The accuracy of the atomic model is verified by comparing the calculations of average charge state with various published results. The monochromatic opacities for iron computed at different sets of temperatures and densities are compared with LEDCOP. The Rosseland and Planck opacities for iron and aluminum are validated with some state-of-the-art codes. The results are in good agreement with the published data.

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Section: Introductionmentioning

confidence: 99%

Radiative properties of matter based on quantum statistical method

et al. 2017

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Simulation on polarization states of finite surface for infrared scenes

Gao

Wang

Shao

et al. 2015

Satellite Data Compression, Communications, and Processing XI

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A design of real-time unipath polarization imaging system based on Wollaston prism

Xu¹,

Fei²,

Liu³

et al. 2016

Acta Phys. Sin.

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A real-time polarization imaging system employing the Wollaston prism and a single charge-coupled device(CCD) chip covering a wavelength range of 400 nm-650 nm is proposed to avoid the false polarization information from dynamic scenes in non-real-time polarization detection imaging method. An architecture consisting of telescope lens, collimation lens, Wollaston prism, the imaging lens and a single CCD chip is employed in the system. The telescope lens is used to focus the incoming light on an intermediate image. And after collimation, the beam is angularly separated by the Wollaston prism. Two beams corresponding to ordinary light and extraordinary light are subsequently focused on the CCD plane via the imaging lens. The telescope lens is designed to have a telecentric structure in the imaging space, and the invert of which is used as the collimation lens, the completely symmetrical structure design is used to reduce the influence of aberrations. More abundant details from this system can be obtained by using matched image post-processing strategy, which is beneficial to high-quality target detection with enhanced working distance and improved environment adaptability. After joint-designing and optimization, the system modulation transfer function (MTF) value at cut-off frequency is higher than 0.55, and the root-mean-square (RMS) radius of the system is less than 5.3 m, which is smaller than the pixel size of the CCD detector. Additionally, the lateral chromatic aberration of the system is much smaller than the diameter of airy disk, and the absolute values of all kinds of aberrations are kept smaller than 0.02 at the same time. The calculation results show that all the aberrations are mostly corrected. The system imaging is numerically modeled and analyzed, and it is demonstrated that two intensity images with perpendicular polarization states appear adjacently on the CCD plane simultaneously in the imaging simulation. One image is formed with the fraction of the backscattered light polarized parallelly to the incident light, and the other with light polarized orthogonally to the incidence, indicating that the expected design is accomplished. Compared with the traditional amplitude-split polarization imaging system, the proposed real-time polarization imaging system shows that the improved performance for real-time detection with promoted power efficiency, spatial resolution, and the light crosstalk in focal plane is well handled. Moreover, the joint design of the whole system can compensate for the distortion aberration in the vertical direction of the CCD detector, which means that a further improvement of image quality can be expected. The proposed system has a promising perspective in the fields of underwater imaging detection, astronomical observation, remote sensing, biological tissues inspection, and environmental monitoring.

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Effects of Finite Surface on Polarization State of Thermal Emission

Cited by 4 publications

References 14 publications

Radiative properties of matter based on quantum statistical method

Radiative properties of matter based on quantum statistical method

Simulation on polarization states of finite surface for infrared scenes

A design of real-time unipath polarization imaging system based on Wollaston prism

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