A Novel Multi-band Plenoptic Pyrometer used for Temperature Measurements of Strand Burner Plumes

Kelly, Dustin; Phillips, Matthew; Thurow, Brian S.; Scarborough, David

doi:10.2514/6.2020-1515

Cited by 3 publications

(2 citation statements)

References 9 publications

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“…Key works in this area include [90][91][92], which separately used discrete and continuous color filters to gain spectral information of a scene. In both cases, the spectral information is further mapped against a blackbody distribution to gain insights into a scene's temperature, in a manner more precise than single-wavelength infrared thermometry.…”

Section: Application To Spectroscopic Imagingmentioning

confidence: 99%

Perspective on the development and application of light-field cameras in flow diagnostics

Tan

Thurow

2021

Meas. Sci. Technol.

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Multi-camera flow diagnostics have made large gains in recent years in the field of three-dimensional and multi-physics measurements. However, cost, complexity and optical access pose challenges that place multi-camera techniques out of reach for many labs. In that context, light-field (LF) imaging represents an alternative approach that can potentially alleviate some of these challenges. LF flow diagnostics is a branch of measurement techniques introduced within the last decade that are based on a plenoptic camera's unique ability to capture three-dimensional and multi-spectral data via a single objective lens and image sensor-albeit at reduced lateral resolutions and depth-to-lateral uncertainty ratios of 3-10 due to limited parallax angle. Thus far, LF flow diagnostics have successfully achieved significant camera-reduction alongside other performance improvements in 3D flow velocimetry, 3D particle tracking, 3D scalar-field tomography, micro-fluidic velocimetry and multi-spectral imaging, as well as early demonstrations of single-camera multi-physics measurements for applications such as 3D fluid-structure interactions. Here, we discuss the state of development in LF flow diagnostics, highlight on-going challenges, and project potential advancements in the near future.

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Section: Application To Spectroscopic Imagingmentioning

confidence: 99%

Perspective on the development and application of light-field cameras in flow diagnostics

Tan

Thurow

2021

Meas. Sci. Technol.

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“…The unique construction of a plenoptic camera reduces optical access requirements, since the angular multiplexing occurs behind the primary objective lens. This also provides multispectral [26][27][28] and hyperspectral [29][30][31] capabilities when spectral filters are placed at the aperture plane. Previous multi and hyperspectral plenoptic work effectively traded angular information for spectral information, thereby prohibiting volumetric reconstruction.…”

Section: Introductionmentioning

confidence: 99%

On the Impact of Subaperture Sampling for Multispectral Scalar Field Measurements

Clifford¹,

Thurow²

2020

Optics

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The novel 3D imaging and reconstruction capabilities of plenoptic cameras are extended for use with continuous scalar fields relevant to reacting flows. This work leverages the abundance of perspective views in a plenoptic camera with the insertion of multiple filters at the aperture plane. The aperture is divided into seven regions using off-the-shelf components, enabling the simultaneous capture of up to seven different user-selected spectra with minimal detriment to reconstruction quality. Since the accuracy of reconstructed features is known to scale with the available angular information, several filter configurations are proposed to maintain the maximum parallax. Three phantoms inspired by jet plumes are simulated onto an array of plenoptic cameras and reconstructed using ASART+TV with a variety of filter configurations. Some systematic challenges related to the non-uniform distribution of views are observed and discussed. Increasing the number of simultaneously acquired spectra is shown to incur a small detriment to the accuracy of reconstruction, but the overall loss in quality is significantly less than the gain in spectral information.

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Review of multispectral radiation thermometry data processing algorithms

Huang

Zhang

Niu

et al. 2023

Infrared Physics & Technology

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A Novel Multi-band Plenoptic Pyrometer used for Temperature Measurements of Strand Burner Plumes

Cited by 3 publications

References 9 publications

Perspective on the development and application of light-field cameras in flow diagnostics

Perspective on the development and application of light-field cameras in flow diagnostics

On the Impact of Subaperture Sampling for Multispectral Scalar Field Measurements

Review of multispectral radiation thermometry data processing algorithms

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