A Hyperspectral Imaging Instrumentation Architecture Based on Accessible Optical Disc Technology and Frequency-Domain Analyses

Brodie, C. Harrison; Devasagayam, Jasen; Collier, Christopher M.

doi:10.1109/tim.2018.2866277

Cited by 7 publications

(3 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Conversely, when the distance between the diffraction grating and the spectral LC pixels is small (for a compact HSI system), the spectral resolution is low and the spectral measurement window is large. These tradeoffs are further discussed in the literature [18].…”

Section: Comparison To Literature: Advantages and Disadvantagesmentioning

confidence: 99%

“…To address this fundamental challenge, researchers have begun to investigate snapshot HSI architectures [15], some of which encode and superimpose the third image dimension onto a dimension of the image sensor that is already in use [16], [17]. For example, our previous work presented an HSI architecture with the potential for a hypercube that mapped Ximage, Yimage, and λ to Xsensor, Ysensor, and F, where F is a modulation frequency [18].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Single-Point Detection Architecture via Liquid Crystal Modulation for Hyperspectral Imaging Systems

Brodie

Collier

2020

IEEE Access

Self Cite

View full text Add to dashboard Cite

Hyperspectral imaging (HSI) architectures can acquire one-dimension of spatial information and one-dimension of spectral information on a two-dimensional image sensor for an image, such as in the traditional line-scan HSI architecture. However, development of HSI architectures for multiple spatial dimensions is challenging as there is not a third dimension on a two-dimensional image sensor on which to store spectral information. The presented work introduces a snapshot HSI architecture to alleviate this issue. The snapshot HSI architecture incorporates single-point detection via liquid crystal modulation and a single photodiode. Mixing of hyperspectral data is expressed as intermodulation frequency products within the Fourier-domain. Spatial information can be recorded through spatial frequencies and spectral information can be recorded through spectral frequencies. Such modulation is achieved through liquid crystal spatial and spectral arrays of an image beam. The spatial and spectral modulation frequencies form intermodulation frequency products that are recorded on the single photodiode and can be uncovered through Fourier-domain filtering. INDEX TERMS Frequency-domain analysis, multispectral imaging, optical diffraction, photodiode This article has been accepted for publication in a future issue of this journal, but has not been fully edited. Content may change prior to final publication.

show abstract

Section: Comparison To Literature: Advantages and Disadvantagesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Single-Point Detection Architecture via Liquid Crystal Modulation for Hyperspectral Imaging Systems

Brodie

Collier

2020

IEEE Access

Self Cite

View full text Add to dashboard Cite

show abstract

“…In the field of instrumentation and measurement (IAM), a number of studies have focused on either hyperspectral technology [ 30 , 31 ], HSI for atmospheric and oceanic measurements [ 32 ], or chemical detection [ 33 , 34 ]. However, to the authors’ knowledge, no studies within IAM have focused exclusively on HSI and polymer aging.…”

Section: Introductionmentioning

confidence: 99%

Visualizing Polymer Damage Using Hyperspectral Imaging

Bleszynski

Mann²,

Kumosa

2020

Polymers

View full text Add to dashboard Cite

Silicone rubbers (SIRs) are common industrial materials which are often used for electrical insulation including weather sheds on non-ceramic insulators (NCIs). While SIRs are typically resilient to outside environments, aging can damage SIRs’ favorable properties such as hydrophobicity and electrical resistance. Detecting SIR aging and damage, however, can be difficult, especially in service. In this study we used hyperspectral imaging (HSI) and previously investigated aging methods as a proof of concept to show how HSI may be used to detect various types of aging damage in different SIR materials. The spectral signature changes in four different SIRs subjected to four different in-service aging environments all occurred between 400––650 nm. Therefore, remote sensing of NCIs using HSI could concentrate on bands below 700 nm to successfully detect in service SIR damage.

show abstract