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Open AccessArticle

Active Hyperspectral Sensor Based on MEMS Fabry-Pérot Interferometer

VTT Technical Research Centre of Finland Ltd, Vuorimiehentie 3, 02150 Espoo, Finland
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Sensors 2019, 19(9), 2192; https://doi.org/10.3390/s19092192
Received: 31 March 2019 / Revised: 4 May 2019 / Accepted: 5 May 2019 / Published: 12 May 2019
(This article belongs to the Special Issue Sensors In Target Detection)
An active hyperspectral sensor (AHS) was developed for target detection and classification applications. AHS measures light scattered from a target, illuminated by a broadband near-infrared supercontinuum (SC) light source. Spectral discrimination is based on a voltage-tunable MEMS Fabry-Pérot Interferometer (FPI). The broadband light is filtered by the FPI prior to transmitting, allowing for a high spectral-power density within the eye-safety limits. The approach also allows for a cost-efficient correction of the SC instability, employing a non-dispersive reference detector. A precision of 0.1% and long-term stability better than 0.5% were demonstrated in laboratory tests. The prototype was mounted on a car for field measurements. Several road types and objects were distinguished based on the spectral response of the sensor targeted in front of the car. View Full-Text
Keywords: hyperspectral; lidar; remote sensing; supercontinuum; FPI hyperspectral; lidar; remote sensing; supercontinuum; FPI
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Kääriäinen, T.; Jaanson, P.; Vaigu, A.; Mannila, R.; Manninen, A. Active Hyperspectral Sensor Based on MEMS Fabry-Pérot Interferometer. Sensors 2019, 19, 2192.

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