Zobrazeno 1 - 10
of 27
pro vyhledávání: '"Timo Dönsberg"'
Autor:
Abba Saleh, Mikhail Mekhrengin, Timo Dönsberg, Teemu Kääriäinen, Guillaume Genoud, Juha Toivonen
Publikováno v:
Scientific Reports, Vol 12, Iss 1, Pp 1-6 (2022)
Abstract We report a novel hyperspectral sensor employing a Fabry-Pérot interferometer based on micro-electro-mechnical system and a custom mid-infrared supercontinuum laser. The Fabry-Pérot interferometer allows on-axis filtering, of spectral comp
Externí odkaz:
https://doaj.org/article/240ccb90fe4946648580ccc3c6480311
Publikováno v:
Tran, T, Porrovecchio, G, Smid, M, Ikonen, E, Dönsberg, T & Gran, J 2022, ' Determination of the responsivity of a predictable quantum efficient detector over a wide spectral range based on a 3D model of charge carrier recombination losses ', Metrologia, vol. 59, no. 4, 045012 . https://doi.org/10.1088/1681-7575/ac604b
Funding Information: This project (18SIB10 chipS.CALe) has received funding from the EMPIR programme co-financed by the Participating States and from the European Union’s Horizon 2020 research and innovation programme. Authors of Aalto University a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a8741789497e84a7ec6b9130504282ed
https://aaltodoc.aalto.fi/handle/123456789/116537
https://aaltodoc.aalto.fi/handle/123456789/116537
Autor:
Abba Saleh, Mikhail Mekhrengin, Timo Dönsberg, Teemu Kaariainen, Guillaume Genoud, Juha Toivonen
Publikováno v:
Saleh, A, Mekhrengin, M, Dönsberg, T, Kaariainen, T, Genoud, G & Toivonen, J 2022, Supercontinuum-based Hyperspectral Sensor for Stand-off Identification of Black Plastics . in Optics and Photonics for Sensing the Environment, ES 2022 : Proceedings ., ETu3H.2, Optical Society of America OSA, Optics and Photonics for Sensing the Environment, ES 2022, Vancouver, Canada, 11/07/22 . https://doi.org/10.1364/ES.2022.ETu3H.2
We report hyperspectral identification of black plastics using a novel sensor employing a MEMS-based Fabry-Pérot interferometer and a custom supercontinuum laser covering a part of the so called molecular fingerprint region at 3 – 3.5 µm.
Publikováno v:
Kääriäinen, T, Mekhrengin, M & Dönsberg, T 2022, Detection and recognition of persons in snowy foliage using active hyperspectral sensing for border control . in B F Andresen, G F Fulop & L Zheng (eds), Infrared Technology and Applications XLVIII ., 1210724, International Society for Optics and Photonics SPIE, Proceedings of SPIE-The International Society for Optical Engineering, vol. 12107, Infrared Technology and Applications XLVIII 2022, Virtual, Online, 6/06/22 . https://doi.org/10.1117/12.2632352
Infrared Technology and Applications XLVIII
Infrared Technology and Applications XLVIII
We demonstrate the use of an active hyperspectral sensor for detection and recognition of persons in snowy foliage. The sensor employs a tunable broadband supercontinuum light source for remote spectrum measurement. An algorithm based on support vect
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::da044fd5529b73d22318f5e046846419
https://cris.vtt.fi/en/publications/f68686c8-8df2-489f-b06f-96524e892f19
https://cris.vtt.fi/en/publications/f68686c8-8df2-489f-b06f-96524e892f19
Publikováno v:
Porrasmaa, S, Dönsberg, T, Manoocheri, F & Ikonen, E 2020, ' Predictable quantum efficient detector for low optical flux measurements ', Optical Review, vol. 27, no. 2, pp. 190-194 . https://doi.org/10.1007/s10043-020-00580-1
The predictable quantum efficient detector (PQED) is a primary standard of optical power, which utilizes two custom-made induced-junction photodiodes that are mounted in a wedged trap configuration for the reduction of reflectance losses. PQED photod
Publikováno v:
Tanabe, M, Shitomi, H, Dönsberg, T & Ikonen, E 2021, ' Characterization of predictable quantum efficient detector in terms of optical non-linearity in the visible to near-infrared range ', Metrologia, vol. 58, no. 5, 055012 . https://doi.org/10.1088/1681-7575/ac1e35
Publisher Copyright: © 2021 BIPM & IOP Publishing Ltd. The characteristics of a predictable quantum efficient detector (PQED) in terms of optical non-linearity in the visible to near-infrared range were investigated under zero-bias and reverse-bias
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::58282a5e75a660ef4681ccdca885b84a
https://cris.vtt.fi/en/publications/2d56a409-7f24-4337-bb68-2d2df1cd93b5
https://cris.vtt.fi/en/publications/2d56a409-7f24-4337-bb68-2d2df1cd93b5
Publikováno v:
Kääriäinen, T, Mekhrengin, M & Dönsberg, T 2021, Active hyperspectral sensing for border control . in D L Hickman, H Bursing, G W Kamerman & O Steinvall (eds), Electro-Optical and Infrared Systems : Technology and Applications XVIII and Electro-Optical Remote Sensing XV ., 118660Y, International Society for Optics and Photonics SPIE, Proceedings of SPIE-The International Society for Optical Engineering, no. 11866, Electro-Optical and Infrared Systems: Technology and Applications XVIII and Electro-Optical Remote Sensing XV 2021, Virtual, Online, Spain, 13/09/21 . https://doi.org/10.1117/12.2598911
Electro-Optical and Infrared Systems: Technology and Applications XVIII and Electro-Optical Remote Sensing XV
Electro-Optical and Infrared Systems: Technology and Applications XVIII and Electro-Optical Remote Sensing XV
There is a need for sensor technologies capable of identifying illegal border crossings through foliage. In this work, we study the use of a novel active hyperspectral sensor for remote identification of persons and vehicles through foliage. The AHS
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::599698624ea858a86adc421d511b2504
https://doi.org/10.1117/12.2598911
https://doi.org/10.1117/12.2598911
Publikováno v:
Optics Letters
Publikováno v:
The Review of scientific instruments. 91(1)
We introduce a cryostat setup for measuring fundamental optical and electrical properties of light-emitting diodes (LEDs). With the setup, the cryostat pressure and the LED properties of the forward voltage, junction temperature, and electroluminesce
Publikováno v:
Metrologia. 55:654-661
This paper presents the experimental characterization of predictable quantum efficient detectors, which have been designed for use at room temperature. The aim of the characterization was to validate modelled properties experimentally and, thus, the