MEMS FPI-based smartphone hyperspectral imager

Anna Rissanen; Heikki Saari; Kari Rainio; Ingmar Stuns; Kai Viherkanto; Christer Holmlund; Ismo Näkki; Harri Ojanen

doi:10.1117/12.2229575

MEMS FPI-based smartphone hyperspectral imager

Anna Rissanen, Heikki Saari, Kari Rainio, Ingmar Stuns, Kai Viherkanto, Christer Holmlund, Ismo Näkki, Harri Ojanen

Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-review

16 Citations (Scopus)

Abstract

This paper demonstrates a mobile phone-compatible hyperspectral imager based on a tunable MEMS Fabry-Perot interferometer. The realized iPhone 5s hyperspectral imager (HSI) demonstrator utilizes MEMS FPI tunable filter for visible-range, which consist of atomic layer deposited (ALD) Al₂O₃/TiO₂-thin film Bragg reflectors. Characterization results for the mobile phone hyperspectral imager utilizing MEMS FPI chip optimized for 500 nm is presented; the operation range is λ = 450-550 nm with FWHM between 8-15 nm. Also a configuration of two cascaded FPIs (λ = 500 nm and λ = 650 nm) combined with an RGB colour camera is presented. With this tandem configuration, the overall wavelength tuning range of MEMS hyperspectral imagers can be extended to cover a larger range than with a single FPI chip. The potential applications of mobile hyperspectral imagers in the vis-NIR range include authentication, counterfeit detection and potential health/wellness and food sensing applications.

Original language	English
Title of host publication	Next-Generation Spectroscopic Technologies IX
Publisher	International Society for Optics and Photonics SPIE
Volume	9855
ISBN (Electronic)	9781510600966
DOIs	https://doi.org/10.1117/12.2229575
Publication status	Published - 1 Jan 2016
MoE publication type	A4 Article in a conference publication
Event	Next-Generation Spectroscopic Technologies IX - Baltimore, United States Duration: 18 Apr 2016 → 19 Apr 2016

Conference

Conference	Next-Generation Spectroscopic Technologies IX
Country	United States
City	Baltimore
Period	18/04/16 → 19/04/16

Keywords

ALD
MEMS Fabry-Perot interferometer
microspectrometers
Mobile hyperspectral imaging
MOEMS
Smartphone spectroscopy

Access to Document

10.1117/12.2229575

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Rissanen, A., Saari, H., Rainio, K., Stuns, I., Viherkanto, K., Holmlund, C., Näkki, I., & Ojanen, H. (2016). MEMS FPI-based smartphone hyperspectral imager. In Next-Generation Spectroscopic Technologies IX (Vol. 9855). [985507] International Society for Optics and Photonics SPIE. https://doi.org/10.1117/12.2229575

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title = "MEMS FPI-based smartphone hyperspectral imager",

abstract = "This paper demonstrates a mobile phone-compatible hyperspectral imager based on a tunable MEMS Fabry-Perot interferometer. The realized iPhone 5s hyperspectral imager (HSI) demonstrator utilizes MEMS FPI tunable filter for visible-range, which consist of atomic layer deposited (ALD) Al2O3/TiO2-thin film Bragg reflectors. Characterization results for the mobile phone hyperspectral imager utilizing MEMS FPI chip optimized for 500 nm is presented; the operation range is λ = 450-550 nm with FWHM between 8-15 nm. Also a configuration of two cascaded FPIs (λ = 500 nm and λ = 650 nm) combined with an RGB colour camera is presented. With this tandem configuration, the overall wavelength tuning range of MEMS hyperspectral imagers can be extended to cover a larger range than with a single FPI chip. The potential applications of mobile hyperspectral imagers in the vis-NIR range include authentication, counterfeit detection and potential health/wellness and food sensing applications.",

keywords = "ALD, MEMS Fabry-Perot interferometer, microspectrometers, Mobile hyperspectral imaging, MOEMS, Smartphone spectroscopy",

author = "Anna Rissanen and Heikki Saari and Kari Rainio and Ingmar Stuns and Kai Viherkanto and Christer Holmlund and Ismo N{\"a}kki and Harri Ojanen",

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Rissanen, A, Saari, H , Rainio, K , Stuns, I , Viherkanto, K , Holmlund, C, Näkki, I & Ojanen, H 2016, MEMS FPI-based smartphone hyperspectral imager. in Next-Generation Spectroscopic Technologies IX. vol. 9855, 985507, International Society for Optics and Photonics SPIE, Next-Generation Spectroscopic Technologies IX, Baltimore, United States, 18/04/16. https://doi.org/10.1117/12.2229575

MEMS FPI-based smartphone hyperspectral imager. / Rissanen, Anna; Saari, Heikki ; Rainio, Kari ; Stuns, Ingmar ; Viherkanto, Kai ; Holmlund, Christer; Näkki, Ismo; Ojanen, Harri.

Next-Generation Spectroscopic Technologies IX. Vol. 9855 International Society for Optics and Photonics SPIE, 2016. 985507.

Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-review

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AU - Näkki, Ismo

AU - Ojanen, Harri

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AB - This paper demonstrates a mobile phone-compatible hyperspectral imager based on a tunable MEMS Fabry-Perot interferometer. The realized iPhone 5s hyperspectral imager (HSI) demonstrator utilizes MEMS FPI tunable filter for visible-range, which consist of atomic layer deposited (ALD) Al2O3/TiO2-thin film Bragg reflectors. Characterization results for the mobile phone hyperspectral imager utilizing MEMS FPI chip optimized for 500 nm is presented; the operation range is λ = 450-550 nm with FWHM between 8-15 nm. Also a configuration of two cascaded FPIs (λ = 500 nm and λ = 650 nm) combined with an RGB colour camera is presented. With this tandem configuration, the overall wavelength tuning range of MEMS hyperspectral imagers can be extended to cover a larger range than with a single FPI chip. The potential applications of mobile hyperspectral imagers in the vis-NIR range include authentication, counterfeit detection and potential health/wellness and food sensing applications.

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