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Several on-going and future experiments use a Stokes polarimeter (i.e. a rotating wave plate followed by a steady polarizer and by an unpolarized detector) to measure the small polarized component of the Cosmic Microwave Background. The…

天体物理仪器与方法 · 物理学 2010-06-17 Maria Salatino , Paolo de Bernardis

Polarimetric observations are affected by leakage of unpolarized light into the polarization channels, in a way that varies with the angular position of the source relative to the optical axis. The off-axis part of the leakage is often…

天体物理学 · 物理学 2015-05-13 R. I. Reid , A. D. Gray , T. L. Landecker , A. G. Willis

Accurate measurement of polarization in spectral lines is important for the reliable inference of magnetic fields on the Sun. For ground based observations, polarimetric precision is severely limited by the presence of Earth's atmosphere.…

仪器与探测器 · 物理学 2012-11-05 K. Nagaraju , Alex Feller

A coherent optical spectrum analyzer is integrated with a rotating quarter wave plate polarimeter. The combined polarimeter optical spectrum analyzer (POSA) allows the extraction of the state of polarization with high spectral resolution.…

光学 · 物理学 2024-05-14 Eyal Buks

The spectral, imaging, and polarimetric behavior of Fabry-P\'erot etalons have an influence on imaging vector magnetograph instruments based on these devices. The impact depends, among others, on the optical configuration (collimated or…

天体物理仪器与方法 · 物理学 2020-02-04 F. J. Bailén , D. Orozco Suárez , J. C. del Toro Iniesta

This paper considers the problem of accurate measurement of circular polarization in imaging spectral-line VLBI observations in the lambda=7 mm and lambda=3 mm wavelength bands. This capability is especially valuable for the full…

天体物理仪器与方法 · 物理学 2015-05-28 A. J. Kemball , L. Richter

The angle of rotation of any target about the radar line of sight (LOS) is known as the polarization orientation angle. The orientation angle is found to be non-zero for undulating terrains and man-made targets oriented away from the radar…

经典物理 · 物理学 2017-04-26 Avik Bhattacharya

We develop a polarization characterization platform for optical devices in free-space quantum communications. We demonstrate an imaging polarimeter, which analyzes both incident polarization states and the angle of incidence, attached to a…

Since specular reflection often exists in the real captured images and causes deviation between the recorded color and intrinsic color, specular reflection separation can bring advantages to multiple applications that require consistent…

计算机视觉与模式识别 · 计算机科学 2022-01-26 Sijia Wen , Yingqiang Zheng , Feng Lu

The value of accurately knowing the absolute calibration of the polarizing elements in the Near Infrared Camera and Multi-Object Spectrometer (NICMOS) becomes especially important when conducting studies which require measuring degrees of…

天体物理学 · 物理学 2009-11-11 D. Batcheldor , A. Robinson , D. Axon , D. C. Hines , W. Sparks , C. Tadhunter

Electron polarimeters based on Mott scattering are extensively used in different fields in physics such as atomic, nuclear or particle physics. This is because spin-dependent measurements gives additional information on the physical…

原子物理 · 物理学 2018-02-06 X. Roca-Maza

In a companion paper we have reported a $>5\sigma$ detection of degree scale $B $-mode polarization at 150 GHz by the BICEP2 experiment. Here we provide a detailed study of potential instrumental systematic contamination to that…

We have upgraded IRCAL, the near-infrared science camera of the Lick Observatory adaptive optics system, to add a dual-channel imaging polarimetry mode. This mode uses an optically contacted YLF (LiYF_4) Wollaston prism to provide…

天体物理学 · 物理学 2009-11-13 Marshall D. Perrin , James R. Graham , James P. Lloyd

Detection thresholds in polarized intensity and polarization bias correction are investigated for surveys where the polarization information is obtained from RM synthesis. Considering unresolved sources with a single rotation measure, a…

天体物理仪器与方法 · 物理学 2015-05-28 Samuel J. George , Jeroen M. Stil , Ben W. Keller

In this work we present an algorithm of building an adequate model of polarizing quantum state measurement. This model takes into account chromatic aberration of the basis change transformation caused by the parasitic dispersion of the wave…

量子物理 · 物理学 2020-02-06 B. I. Bantysh , Yu. I. Bogdanov , N. A. Bogdanova , Yu. A. Kuznetsov

Electrode polarization error is the biggest problem when measuring the low frequency dielectric properties of electrolytes or suspensions of particles, including cells, in electrolytes. We present a simple and robust method to remove the…

软凝聚态物质 · 物理学 2008-05-13 Camelia Prodan , Corina Bot

Classical polarimetry is a well-established discipline with diverse applications across different branches of science. The burgeoning interest in leveraging quantum resources to achieve highly sensitive measurements has spurred researchers…

We consider a method for obtaining information on polarization of astronomical objects radiation at diffraction limited resolution - differential speckle polarimetry. As an observable we propose to use averaged cross spectrum of two…

天体物理仪器与方法 · 物理学 2015-06-12 Boris Safonov

The detection of the primordial B-mode polarization signal of the cosmic microwave background (CMB) would provide evidence for inflation. Yet as has become increasingly clear, the detection of a such a faint signal requires an instrument…

天体物理仪器与方法 · 物理学 2015-11-24 Peter C. Nagler , Dale J. Fixsen , Alan Kogut , Gregory S. Tucker

Images obtained from coherent illumination processes are contaminated with speckle. A prominent example of such imagery systems is the polarimetric synthetic aperture radar (PolSAR). For such remote sensing tool the speckle interference…

信息论 · 计算机科学 2018-09-18 Abraão D. C. Nascimento , Alejandro C. Frery , Renato J. Cintra