Active Hyperspectral Sensor Based on MEMS Fabry-Pérot Interferometer

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

Research output: Contribution to journalArticleScientificpeer-review

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

Fingerprint

Micro-Electrical-Mechanical Systems
Interferometers
microelectromechanical systems
MEMS
interferometers
Light
sensors
Sensors
Railroad cars
broadband
Power spectral density
spectral sensitivity
Target tracking
roads
Light sources
discrimination
radiant flux density
safety
light sources
prototypes

Keywords

  • hyperspectral
  • lidar
  • remote sensing
  • supercontinuum
  • FPI

Cite this

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title = "Active Hyperspectral Sensor Based on MEMS Fabry-P{\'e}rot Interferometer",
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-P{\'e}rot 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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Active Hyperspectral Sensor Based on MEMS Fabry-Pérot Interferometer. / Kääriäinen, Teemu; Jaanson, Priit; Vaigu, Aigar; Mannila, Rami; Manninen, Albert (Corresponding Author).

In: Sensors, Vol. 19, No. 9, 2192, 2019.

Research output: Contribution to journalArticleScientificpeer-review

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AU - Kääriäinen, Teemu

AU - Jaanson, Priit

AU - Vaigu, Aigar

AU - Mannila, Rami

AU - Manninen, Albert

N1 - Project 121775

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