Active Hyperspectral Sensor Based on MEMS Fabry-Pérot Interferometer

Teemu Kääriäinen, Priit Jaanson, Aigar Vaigu, Rami Mannila, Albert Manninen (Corresponding Author)

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    Abstract

    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.
    Original languageEnglish
    Article number2192
    JournalSensors
    Volume19
    Issue number9
    DOIs
    Publication statusPublished - 2019
    MoE publication typeA1 Journal article-refereed

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    Keywords

    • hyperspectral
    • lidar
    • remote sensing
    • supercontinuum
    • FPI

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