A temperature-controlled mid-wave infrared polarization radiation source with adjustable degree of linear polarization

Sun, Zunyi; Jin, Weiqi; Kang, Guoguo; Li, Li; Yang, Jianguo

doi:10.1016/j.measurement.2022.111210

Cited by 4 publications

(3 citation statements)

References 11 publications

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“…Reflection and spontaneous radiation also exist in the micro-polarizer array and objective lens of the DoFP polarization imaging system [12][13] , which affect the detection accuracy of the DoFP infrared polarization thermal imaging camera, and this paper proposes a correction model of the DoFP polarization imaging system, as shown in Fig. 3.…”

Section: Mathematical Modeling Of Dofp Polarization Imaging Systemmentioning

confidence: 99%

Research on a radiative correction method for the division of focal plane polarization in mid-infrared imaging system

Sun,

Long,

Zhang

et al. 2024

Sixth Conference on Frontiers in Optical Imaging and Technology: Novel Detector Technologies

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In recent years, infrared thermal polarization imaging technology has emerged as a new method of infrared detection. Its main objective is to detect, identify, and track the differences in infrared polarization characteristics between targets and scenes. Compared to ordinary infrared imaging systems, this technology offers significant advantages for detecting and identifying man-made targets in complex natural backgrounds. Specifically, the division of focal plane (DoFP) polarimeter is currently being extensively researched due to its compact structure, small volume, and real-time imaging capabilities. However, the focal plane array (FPA) of the DoFP polarimeter exhibits varying response gains and bias parameters, while the micro-polarizer array on its surface suffers manufacturing defects, resulting in significant nonuniformity errors that adversely affect resolution accuracy. This paper analyzes the mechanism behind the generation of non-uniformity in the DoFP polarization imaging system and establishes a relationship between the output grayscale of the system and incident irradiance. Additionally, through the use of a mid-infrared polarization radiation source, the proposed method conducts irradiation calibration and polarization parameter calibration to rectify the non-uniformity of the detection image of the system. Based on experimental results, the calibration model significantly enhances the accuracy of polarization detection information for scene targets.

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Section: Mathematical Modeling Of Dofp Polarization Imaging Systemmentioning

confidence: 99%

Research on a radiative correction method for the division of focal plane polarization in mid-infrared imaging system

Sun,

Long,

Zhang

et al. 2024

Sixth Conference on Frontiers in Optical Imaging and Technology: Novel Detector Technologies

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show abstract

“…2 This necessitates a robust source that can maintain its polarization characteristics despite fluctuations in ambient temperatures and thermal radiation from surrounding objects. 1,2,[12][13][14][15]…”

Section: Polarimetric Calibration Requirementsmentioning

confidence: 99%

“…24,25 Research has demonstrated polarized emissions from thin films and wires across visible to mid-wave IR bands. 12,[24][25][26][27][28] The AoLP and DoLP from thin wires correlate with wire diameter; emissions from wires significantly smaller than the wavelength typically exhibit high DoLP with AoLP aligned with the wire's orientation. 29,30 Conversely, for diameters comparable to or larger than the wavelength, DoLP decreases and AoLP becomes orthogonal to the wire.…”

Section: Generating a Polarized Signalmentioning

confidence: 99%

Developing a robust thermal polarized calibration source

Parkinson,

Kupinski

2024

Polarization: Measurement, Analysis, and Remote Sensing XVI

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Performance fluctuations of LWIR radiometers necessitate frequent calibration which is further complicated for LWIR polarimeters. Existing compact LWIR polarization calibration methods have inherent limitations; notably, combining an unpolarized source with a wire-grid polarizer can lead to polarized reflections which depend upon the thermal environment. Furthermore, microbolometers, which have risen in popularity due to their low size, weight, and power (SWaP) and cost, have intrinsic diattenuation. This research reviews several approaches to generating a linearly polarized signal in the thermal IR waveband for use as a polarimetric calibration target. The impact of environmental reflections from wire-grid polarizers and the intrinsic polarimetric response of a low-cost uncooled microbolometer is first demonstrated. A wire-grid polarizer is place in direct contact with a heating element to analyze the emission behavior of the wire-grid polarizer. Thin wires are also known to exhibit polarized thermal emission. This phenomena is observed through application of an electrical current through nanoscale wires of a wire-grid polarizer as well as through 20[µm] diameter tungsten wires suspended in free-space. The goal of these investigations is a low SWaP polarimetric calibration source for thermal LWIR polarimeters that is robust to the environmental fluctuations.

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Theoretical design and experimental validation of rupture discs for water heat pipe blackbody source

Yuan,

Li,

et al. 2025

Measurement

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A temperature-controlled mid-wave infrared polarization radiation source with adjustable degree of linear polarization

Cited by 4 publications

References 11 publications

Research on a radiative correction method for the division of focal plane polarization in mid-infrared imaging system

Research on a radiative correction method for the division of focal plane polarization in mid-infrared imaging system

Developing a robust thermal polarized calibration source

Theoretical design and experimental validation of rupture discs for water heat pipe blackbody source

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