Single-shot omnidirectional Stokes polarimetry

Eshaghi, Mahdi; Dogariu, Aristide

doi:10.1364/ol.396528

Cited by 8 publications

(4 citation statements)

References 24 publications

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“…Polarization measurement is important in many applications, such as in sky polarized light navigation [1], remote sensing [2][3][4], the food industry [5][6][7][8] and ellipsometry [9][10][11]. Generally, four methods, including interferometric polarimeter [12,13], temporally modulated polarimeter [14,15], division-of-amplitude polarimeter [16,17] and spatially modulated polarimeter [18][19][20][21], are well accepted to solve this problem. In a interferometric polarimeter, the coherent optical paths are constructed, and the polarization information can be calculated from the interference pattern.…”

Section: Introductionmentioning

confidence: 99%

An Improved CNN for Polarization Direction Measurement

Han,

Liu,

Wang

et al. 2023

Electronics

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Spatially polarization modulation has been proven to be an efficient and simple method for polarization measurement. Since the polarization information is encoded in the intensity distribution of the modulated light, the task of polarization measurement can be treated as the image processing problem, while the pattern of the light is captured by a camera. However, classical image processing methods could not meet the increasing demand of practical applications due to their poor computational efficiency. To address this issue, in this paper, an improved Convolutional Neural Network is proposed to extract the Stokes parameters of the light from the irradiance image. In our algorithm, residual blocks are adopted and different layers are connected to ensure that the underlying features include more details of the image. Furthermore, refined residual block and Global Average Pooling are introduced to avoid overfitting issues and gradient vanishing problems. Finally, our algorithm is tested on massive synthetic and real data, while the mean square error (MSE) between the extracted values and the true values of the normalized Stokes parameters is counted. Compared to VGG and FAM, the experimental results demonstrate that our algorithm has outstanding performance.

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Section: Introductionmentioning

confidence: 99%

An Improved CNN for Polarization Direction Measurement

Han,

Liu,

Wang

et al. 2023

Electronics

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“…Modern interferometry techniques gained significant interest in the last two decades with the advancements in highresolution image sensors and state-of-the-art computational techniques with applications ranging from astronomy to medicine, from industrial manufacturing to quantitative microscopy, from metrology to polarimetry, etc [1][2][3][4][5][6][7][8] . Interferometry techniques have been witnessed enormous technological progress for many years with the utilization of various interferometer configurations including Michelson interferometer [9][10][11] , Fizeau interferometer 12,13 , Mach-Zehnder interferometer 14,15 , shearing interferometer 16,17 , Twyman-Green interferometer 18 , multiple wavelength interferometer 19,20 , white light interferometer 21 , are few among others.…”

Section: Introductionmentioning

confidence: 99%

Snapshot on-axis Fizeau polarization phase-shifting interferometer

Liu

Du²,

Chen³

et al. 2022

Holography, Diffractive Optics, and Applications XII

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We propose and experimentally demonstrate a highly stable on-axis near common-path snapshot Fizeau-polarization phase-shifting interferometer by combining the polarization phase-shifting scheme with Fizeau on-axis interferometry. The compact on-axis design of the Fizeau interferometry is achieved by utilizing the characteristic feature of a wire grid polarizer, which generates the orthogonal polarization components required for the proposed polarization phase-shifting scheme. The quantitative phase measurement capability is experimentally validated by estimating the phase profile of various phase-sensitive standard and unknown phase samples.

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“…

Polarization is an essential property of the light. It is important to measure the polarization state in many applications, such as remote sensing [1-3], biomedicine [4,5], sky polarized light navigation [6], fluorescence polarization immunoassay [7], ellipsometry [8-10], seismic acquisition [11] and so on.The state-of-the-art methods for polarization measurement can be summarized as four typical classes, interferometric polarimeter [12,13], temporally modulated polarimeter [14,15], division-of-amplitude polarimeter [16,17] and spatially modulated polarimeter [6,10,[18][19][20][21][22][23]. The first three families of methods need to carry out a serial of measurements with different orthogonal states of polarization.

…”

mentioning

confidence: 99%

“…The state-of-the-art methods for polarization measurement can be summarized as four typical classes, interferometric polarimeter [12,13], temporally modulated polarimeter [14,15], division-of-amplitude polarimeter [16,17] and spatially modulated polarimeter [6,10,[18][19][20][21][22][23]. The first three families of methods need to carry out a serial of measurements with different orthogonal states of polarization.…”

mentioning

confidence: 99%

A new polarization direction measurement via local Radon transform and error correction

Wang

Gao

Yan

et al. 2022

EURASIP J. Adv. Signal Process.

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Vectorial optical field-based spatially polarization modulation has been widely studied for polarization measurement due to its simple system structure. In this system, the polarization information is encoded in the irradiance image, and polarization measurement can be realized by image processing. The classical image processing methods could not meet the increasing demand of practical applications due to their poor computational efficiency. To address this issue, a new image processing method, combining the rapidity of local radon transform (LRT) and the precision of error correction (EC), was proposed in this paper. Firstly, the polarization direction of the light was coarsely estimated from pixels on several circles. Then, the LRT of the input image was completed while the coarsely estimated direction was the center angle for LRT. Finally, the EC was conducted to get the accurate direction depending on the quantitative link between the error of the coarse estimation and the correlation between the LRTs. Experiments on synthetic and real data demonstrate that, compared to the other state-of-the-art methods, our proposed algorithm is more robust and less time-consuming.

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Single-shot omnidirectional Stokes polarimetry

Cited by 8 publications

References 24 publications

An Improved CNN for Polarization Direction Measurement

An Improved CNN for Polarization Direction Measurement

Snapshot on-axis Fizeau polarization phase-shifting interferometer

A new polarization direction measurement via local Radon transform and error correction

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