Infrared devices and techniques

Rogalski, Antoni; Chrzanowski, Krzysztof

doi:10.1201/9781315157009-18

Cited by 41 publications

(23 citation statements)

References 1 publication

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“…1, pp. [20][21][22][23][24] This is an open access article published by the IET under the Creative Commons Attribution-NonCommercial-NoDerivs License (http://creativecommons.org/licenses/by-nc-nd/3.0/) eliminate any shading or subtractive blocking effects for their output or generation. Spatial location of a thermocouple is paramount for measurement accuracy, and as described by Fourier's law of conduction a δT will be exhibited with non-zero distances.…”

Section: Closed-loop Integrated Cooler (Clic) Device Overview and Expmentioning

confidence: 99%

“…Measurements are assumed to be taken with the sample perpendicular to the IR sensor, something infeasible whilst avoiding cell/device shading. FLiR cameras are excellent at recording thermal distribution information but the thermal emissivity selected, defined in the measurement procedure, is critical to measurement accuracy [21]. Furthermore, similar to IR thermometers, use of the device at nonperpendicular angles can also exhibit spectral diffusion and reflection effects in the received reading and hence give spurious/ inaccurate output data.…”

Section: Closed-loop Integrated Cooler (Clic) Device Overview and Expmentioning

confidence: 99%

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Photovoltaic–thermoelectric temperature control using a closed‐loop integrated cooler

Rolley

Sweet

Min

2018

IET Optoelectronics

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The Closed-Loop Integrated Cooler (CLIC) is a novel technique deployed on experimental apparatus to accurately measure, monitor and control the temperature of optoelectronic devices. Demonstrated here within a Concentrator Photovoltaic-Thermoelectric (CPV-TE) hybrid device, the thermoelectric module was used as a solid state sensor and heat pump in order to control the operational temperature for a triple-junction solar cell. The technique was used to achieve stable, reproducible and repeatable Standard Test Conditions (STC) of 25 o C cell temperature, with 1000W/m 2 irradiance and AM1.5G spectrum. During testing with Secondary Optical Element (SOE) optics in a solar simulator, the CLIC enabled accurate temperature control of the CPV cell. This would otherwise be unfeasible due to the spectral, reflective and diffusive effects of the SOE optics. The CLIC was used to obtain temporal and spatial constant temperature of the CPV-TE hybrid receiver during Current-Voltage measurement. This method highlights the future potential of the CLIC for accurate temperature control of optoelectronic devices both during testing and in future semiconductor device applications where temperature control is essential to performance or lifetime.

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Section: Closed-loop Integrated Cooler (Clic) Device Overview and Expmentioning

confidence: 99%

Section: Closed-loop Integrated Cooler (Clic) Device Overview and Expmentioning

confidence: 99%

Photovoltaic–thermoelectric temperature control using a closed‐loop integrated cooler

Rolley

Sweet

Min

2018

IET Optoelectronics

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“…With an additional advantage of on-chip integration with Si electronic circuits, Si-based integrated spectroscopic sensing could provide substantial benefits in terms of low cost, small footprint, low power, limited space employment, access to advanced noise reduction, and Si-CMOS high-volume manufacturing [ 8 , 9 , 10 , 11 , 12 ]. Several environmentally-important gas molecules have characteristic absorption lines within the short-wave infrared (~1.4–3 μm), mid-wave infrared (~3–8 μm), or long-wave infrared (~8–14 μm) [ 13 , 14 ]. On the one hand, a number of waveguide platforms have been experimentally or theoretically proposed, such as pedestal Si [ 15 ], chalcogenide-based waveguides [ 16 , 17 ], Si-on-sapphire [ 18 ], Ge-rich SiGe [ 19 , 20 , 21 ], and Si-on-Si 3 N 4 waveguides [ 22 ], in order to take advantage of fingerprint absorption in the mid- and long-wave infrared regions.…”

Section: Introductionmentioning

confidence: 99%

Design and Simulation Investigation of Si3N4 Photonics Circuits for Wideband On-Chip Optical Gas Sensing around 2 µm Optical Wavelength

Koompai

Chaisakul

Limsuwan

et al. 2021

Sensors

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We theoretically explore the potential of Si3N4 on SiO2 waveguide platform toward a wideband spectroscopic detection around the optical wavelength of 2 μm. The design of Si3N4 on SiO2 waveguide architectures consisting of a Si3N4 slot waveguide for a wideband on-chip spectroscopic sensing around 2 μm, and a Si3N4 multi-mode interferometer (MMI)-based coupler for light coupling from classical strip waveguide into the identified Si3N4 slot waveguides over a wide spectral range are investigated. We found that a Si3N4 on SiO2 slot waveguide structure can be designed for using as optical interaction part over a spectral range of interest, and the MMI structure can be used to enable broadband optical coupling from a strip to the slot waveguide for wideband multi-gas on-chip spectroscopic sensing. Reasons for the operating spectral range of the system are discussed.

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“…Mutlak sıfır noktası (-273,15 °C, 0 °K) üzerinde tüm nesneler, sıcaklıklarına ve spektral emisivitelerine bağlı olarak kızılötesi radyasyon yayma yeteneğine sahiptir [1]. Vücudun yaydığı radyasyon miktarı elektromanyetik spektrumun kızılötesi alanı içindedir ve dalga boyu 0,75-1000 mikrometre aralığındadır [2].…”

Section: Introductionunclassified

“…Kara cisim, Planck Yasası'na göre gelen tüm enerjiyi emen ve sürekli enerji yayan bir nesne olarak kabul edilir [5]. Bir kara cisim tarafından yayılan enerji, belirli bir sıcaklık için maksimum değerdedir [1]. Bu nedenle insan derisinin yayma gücü bir kara cismin yayma gücüne yakın olduğundan deriden yayılan kızılötesi radyasyon, termal görüntüleme kullanılarak doğrudan sıcaklık değerlerine dönüştürülebilir.…”

Section: Introductionunclassified

Kızılötesi Termal Görüntülemenin Yapay Zeka Tabanlı Biyomedikal Uygulamaları

Ervural

Ceylan

2021

jai

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Kızılötesi termal görüntüleme, vücut sıcaklığı dağılımının ve değişiminin izlenmesine izin veren invazif olmayan, zararlı radyasyon içermeyen, temassız bir modalitedir. Periferik kan akışı, otonom sinir sistemi, vazokonstrüksiyon / vazodilatasyon, iltihaplanma, terleme veya diğer süreçler hakkında fizyolojik bilgiler sağlaması medikal alanda kullanımını yaygınlaştırmıştır. Yapay zekâ alanında yaşanan gelişmeler medikal uygulamalarda da karşılık bulmuş ve makine öğrenimi metotları; karar verme, hastalık takibi, cerrahi planlama gibi birçok görev için kullanılır hâle gelmiştir. Termal verilerin yorumlanması için yapay zekâ yöntemlerinin kullanılması, bir tanı, tedavi planlama veya cerrahi değerlendirme senaryosunda doktorlara ikinci bir görüş sağlamak için etkin bir çözüm olabilir. Bu araştırmanın amacı: Literatür kaynaklarının incelenerek termal görüntülemenin medikal uygulamalardaki sınıflandırma, karar verme gibi süreçlerde yapay zekâ yöntemlerinin işleyişlerini değerlendirmek ve literatür hakkında bilgi sunmaktır.Infrared thermal imaging is a non-invasive, harmless radiation-free non-contact modality that allows monitoring of body temperature distribution and change. Providing physiological information about peripheral blood flow, autonomic nervous system, vasoconstriction / vasodilation, inflammation, sweating or other processes has expanded its use in the medical field. Developments in the field of artificial intelligence have also found response in medical applications, and machine learning methods have become used for many tasks such as decision making, disease monitoring, and surgical planning. Using artificial intelligence methods to interpret thermal data can be an effective solution to provide doctors with a second opinion in a diagnosis, treatment planning or surgical evaluation scenario. The purpose of this research; To evaluate the functioning of artificial intelligence methods in medical applications such as classification and decision making of thermal imaging by examining the literature sources and to provide information about the literature.

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Infrared devices and techniques

Cited by 41 publications

References 1 publication

Photovoltaic–thermoelectric temperature control using a closed‐loop integrated cooler

Photovoltaic–thermoelectric temperature control using a closed‐loop integrated cooler

Design and Simulation Investigation of Si3N4 Photonics Circuits for Wideband On-Chip Optical Gas Sensing around 2 µm Optical Wavelength

Kızılötesi Termal Görüntülemenin Yapay Zeka Tabanlı Biyomedikal Uygulamaları

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