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Active Hyperspectral Sensor Based on MEMS Fabry-Pérot Interferometer



Active Hyperspectral Sensor Based on MEMS Fabry-Pérot Interferometer



Sensors 19(9):



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.

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Accession: 066779338

Download citation: RISBibTeXText

PMID: 31083615

DOI: 10.3390/s19092192


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