Miniature near-infrared (NIR) spectrometer engine for handheld applications

O’Brien, Nada A.; Hulse, Charles A.; Friedrich, Donald M.; Milligen, Fred J. van; Gunten, Marc K. von; Pfeifer, Frank; Siesler, Heinz W.

doi:10.1117/12.917983

Cited by 60 publications

(41 citation statements)

References 7 publications

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“…6d), based on an LVF and 128-pixel InGaAs array, covering 950-1650 nm (10 526-6060 cm -1 ), with a spectral bandwidth (resolution) of <1.25% of center wavelength yielding a resolution of <12.5 nm at 1000 nm). [247][248][249][250] The handheld instruments are powered via their USB interface; typical measurement times are < 1 s. Siesler has compared a laboratory FT-IR and the Viavi MicroNIR 1700 instruments 251 and found that calibrations for both quantitative predictions and qualitative classifications can be transferred successfully from the laboratory instrument to the portable analyzer. He has also compared the performance of several miniature NIR spectrometers for polymer identification (recycling).…”

Section: Linear Variable Filtersmentioning

confidence: 99%

Portable Spectroscopy

Crocombe¹

2018

Appl Spectrosc

377

233

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Until very recently, handheld spectrometers were the domain of major analytical and security instrument companies, with turnkey analyzers using spectroscopic techniques from X-ray fluorescence (XRF) for elemental analysis (metals), to Raman, mid-infrared, and near-infrared (NIR) for molecular analysis (mostly organics). However, the past few years have seen rapid changes in this landscape with the introduction of handheld laser-induced breakdown spectroscopy (LIBS), smartphone spectroscopy focusing on medical diagnostics for low-resource areas, commercial engines that a variety of companies can build up into products, hyphenated or dual technology instruments, low-cost visible-shortwave NIR instruments selling directly to the public, and, most recently, portable hyperspectral imaging instruments. Successful handheld instruments are designed to give answers to non-scientist operators; therefore, their developers have put extensive resources into reliable identification algorithms, spectroscopic libraries or databases, and qualitative and quantitative calibrations. As spectroscopic instruments become smaller and lower cost, ''engines'' have emerged, leading to the possibility of being incorporated in consumer devices and smart appliances, part of the Internet of Things (IOT). This review outlines the technologies used in portable spectroscopy, discusses their applications, both qualitative and quantitative, and how instrument developers and vendors have approached giving actionable answers to non-scientists. It outlines concerns on crowdsourced data, especially for heterogeneous samples, and finally looks towards the future in areas like IOT, emerging technologies for instruments, and portable hyphenated and hyperspectral instruments.

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Section: Linear Variable Filtersmentioning

confidence: 99%

Portable Spectroscopy

Crocombe¹

2018

Appl Spectrosc

377

233

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“…These new developments were partly driven by the potential advantages of micro-electro-mechanical systems (MEMS) production; following this technology advance, there has been an extensive review of handheld spectrometers and their performance tests for multi-component analysis of solid and liquid samples. 32 JDS Uniphase (JDSU) has developed and introduced two new miniaturized spectrometer systems called the JDSU MicroNIR spectrometers (MicroNIR) (Figure 2), one with a standard spectral range of 950-1650 nm (MicroNIR 1700) and another with an extended spectral range of 1150-2150 nm (MicroNIR 2200). The spectrometers use the LVF technology as the dispersing element.…”

Section: An Overview Of Cotton Fiber Micronaire Measurements By Near-mentioning

confidence: 99%

Cotton Micronaire Measurements Using Small Portable Near-Infrared (NIR) Analyzers

Zumba

Rodgers

2016

Appl Spectrosc

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A key quality and processing parameter for cotton fiber is micronaire, which is a function of the fiber's maturity and fineness. Near-infrared (NIR) spectroscopy has previously shown the ability to measure micronaire, primarily in the laboratory and using large, research-grade laboratory NIR instrumentation. International interest has been expressed by the industry in the measurement of fiber micronaire using small, portable NIR spectroscopy instruments for both laboratory and outside the laboratory (e.g., field or greenhouse) locations. New, very small NIR micro-spectrometers have been commercialized that offer the potential advantages of smaller size and lower weight, lower cost, and increased portability over current portable units. A program was implemented to determine the feasibility of a small NIR microspectrometer to measure fiber micronaire both in the laboratory and outside the laboratory, with initial emphasis on laboratory measurements prior to moving to field evaluations. In the laboratory, distinct spectral differences with increasing micronaire were observed. Optimal sampling and instrumental procedures and protocols for two units (different spectral wavelength capabilities) were established. Comparative evaluations established very good method micronaire agreement between the micro-spectrometer and a standard portable spectrometer, with high Regression (R) value, low residuals, and few outliers (less than 20%). The NIR micro-spectrometer measurements were fast (<1 min per sample), required no sample preparation, and were easy to perform. All end-state criteria were exceeded. The rapid and accurate laboratory measurement of fiber micronaire with a NIR micro-spectrometer was demonstrated.

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“…Cette miniaturisation accompagne le souhait des utilisateurs de développer des applications de terrain passant d'une utilisation plutôt en recherche ou analyse de routine à une utilisation directe au champ (figure 3). Cependant, le passage d'une approche où l'on amène l'échantillon au spectromètre dans le laboratoire à une approche où l'on amène le spectromètre à l'échantillon n'est intéressante que si la réduction de la taille de l'appareil ne compromet pas la performance du spectromètre (O'Brien et al, 2012).…”

Section: Mise En Oeuvre Sur Le Terrainunclassified

La spectrométrie dans le proche infrarouge pour la caractérisation des ressources alimentaires

et al. 2019

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Le pilotage des systèmes d’élevage en vue d’une optimisation technique, économique et environnementale passe par une formulation des rations de plus en plus précise et nécessite donc une connaissance fine des aliments consommés par les animaux. La spectrométrie dans le proche infrarouge (SPIR), utilisée de façon croissante depuis les années 60, est une technique analytique permettant de caractériser rapidement des échantillons d’aliments ou de fourrages. Les premières applications concernaient la composition chimique des fourrages, mais il est également possible de développer des étalonnages pour une estimation de la valeur nutritive et de l’ingestion. Au-delà de ces mesures directes sur l’aliment, la SPIR peut être appliquée sur les fèces afin de caractériser l’alimentation d’animaux sur parcours. Le traitement conjoint des spectres des aliments et des fèces peut donner une vision de l’utilisation réellement faite des aliments par les animaux. D’autres utilisations possibles de la SPIR comme la traçabilité ou la classification des aliments ainsi que la reconnaissance botanique des végétaux dans les prairies sont aussi décrites. Les développements techniques actuels, et notamment la miniaturisation des spectromètres, permettent d’amener les instruments sur le terrain pour produire l’information au plus près de son utilisation. D’autres techniques spectroscopiques alternatives ou complémentaires à la SPIR comme la spectroscopie dans le moyen infrarouge, la spectroscopie Raman ou l’imagerie hyperspectrale permettront d’autres conditions de mesures et d’autres applications.

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Miniature near-infrared (NIR) spectrometer engine for handheld applications

Cited by 60 publications

References 7 publications

Portable Spectroscopy

Portable Spectroscopy

Cotton Micronaire Measurements Using Small Portable Near-Infrared (NIR) Analyzers

La spectrométrie dans le proche infrarouge pour la caractérisation des ressources alimentaires

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