Fieldable Mueller matrix imaging spectropolarimeter using a hybrid spatial and temporal modulation scheme

Kudenov, Michael W.; Krafft, Danny; Scarboro, Clifton G.; Doherty, Colleen J.; Balint‐Kurti, Peter

doi:10.1117/12.2593970

Cited by 2 publications

(1 citation statement)

References 21 publications

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“…[8][9][10][11][12] The second obstacle has been mitigated using multi-domain modulation strategies that allow the separation of the channels to increase the bandwidth and reduce cross-talk. [13][14][15][16][17][18] We recently presented a channeled, imaging Mueller matrix polarimeter that combines a dynamic, spatially modulated polarization state generator (PSG) with a micro-polarizer array (MPA) as polarization state analyzer (PSA). 19 In our system, a phase-only spatial light modulator (SLM) in the PSG allows the dynamic control of the polarization state distribution of the illumination, which can be adjusted according to the spatial frequency properties of the scene to improve the polarimetric image quality.…”

Section: Introductionmentioning

confidence: 99%

Feasibility analysis and Mueller matrix retrieval strategy for a scene-adaptive modulated imaging polarimeter

Rodríguez-Herrera,

Tyo,

Wang

et al. 2023

Polarization Science and Remote Sensing XI

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Multi-domain modulated polarimeters offer benefits such as an increased channel separation in the frequency domain, allowing a reduction in cross-talk and improving their performance in the retrieval of the polarization information. Although the experimental implementation of this kind of system cannot be realized with perfect, periodic modulation due to practical limitations, machine learning methods have been used to obtain the correct calibration parameters and reduce errors during the data reduction stage. The aforementioned strategies have improved the performance of modulated polarimeters. However, in the modulated polarimetric systems reported in the literature, the modulation parameters are set during the design stage and remain unchanged during operation. In this work, we present a dynamic, spatially channeled, imaging Mueller matrix polarimeter in which the modulation parameters of the polarization state generator (PSG) can be adjusted during operation to achieve better performance depending on the spatial frequency properties of the scene under analysis. We present experimental evidence of the feasibility of the method, discuss its capabilities and current limitations, and describe a strategy to retrieve the Mueller matrix of a scene.

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Section: Introductionmentioning

confidence: 99%

Feasibility analysis and Mueller matrix retrieval strategy for a scene-adaptive modulated imaging polarimeter

Rodríguez-Herrera,

Tyo,

Wang

et al. 2023

Polarization Science and Remote Sensing XI

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Hybrid spatial–temporal Mueller matrix imaging spectropolarimeter for high throughput plant phenotyping

et al. 2023

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Many correlations exist between spectral reflectance or transmission with various phenotypic responses from plants. Of interest to us are metabolic characteristics, namely, how the various polarimetric components of plants may correlate to underlying environmental, metabolic, and genotypic differences among different varieties within a given species, as conducted during large field experimental trials. In this paper, we overview a portable Mueller matrix imaging spectropolarimeter, optimized for field use, by combining a temporal and spatial modulation scheme. Key aspects of the design include minimizing the measurement time while maximizing the signal-to-noise ratio by mitigating systematic error. This was achieved while maintaining an imaging capability across multiple measurement wavelengths, spanning the blue to near-infrared spectral region (405–730 nm). To this end, we present our optimization procedure, simulations, and calibration methods. Validation results, which were taken in redundant and non-redundant measurement configurations, indicated that the polarimeter provides average absolute errors of (5.3±2.2)×10−3 and (7.1±3.1)×10−3, respectively. Finally, we provide preliminary field data (depolarization, retardance, and diattenuation) to establish baselines of barren and non-barren Zea maize hybrids (G90 variety), as captured from various leaf and canopy positions during our summer 2022 field experiments. Results indicate that subtle variations in retardance and diattenuation versus leaf canopy position may be present before they are clearly visible in the spectral transmission.

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Fieldable Mueller matrix imaging spectropolarimeter using a hybrid spatial and temporal modulation scheme

Cited by 2 publications

References 21 publications

Feasibility analysis and Mueller matrix retrieval strategy for a scene-adaptive modulated imaging polarimeter

Feasibility analysis and Mueller matrix retrieval strategy for a scene-adaptive modulated imaging polarimeter

Hybrid spatial–temporal Mueller matrix imaging spectropolarimeter for high throughput plant phenotyping

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