@inproceedings{99d38e74e3f94c2cabe82d0dc4190db1,
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",
year = "2016",
month = jan,
day = "1",
doi = "10.1117/12.2229575",
language = "English",
isbn = "978-1-5106-0096-6",
series = "Proceedings of SPIE",
publisher = "International Society for Optics and Photonics SPIE",
editor = "Druy, {Mark A.} and Crocombe, {Richard A.}",
booktitle = "Next-Generation Spectroscopic Technologies IX",
address = "United States",
note = "Next-Generation Spectroscopic Technologies IX ; Conference date: 18-04-2016 Through 19-04-2016",
}