Miniaturized spectral imager for Aalto-1 nanosatellite

Rami Mannila, Antti Näsilä, Jaan Praks, Heikki Saari, Jarkko Antila

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

6 Citations (Scopus)

Abstract

The Aalto-1 is a 3U-cubesat project coordinated by Aalto University. The satellite, Aalto-1, will be mainly built by students as project assignments and thesis works. VTT Technical Research Centre of Finland will develop the main Earth observation payload, a miniaturized spectral imager, for the satellite. It is a novel highly miniaturized tunable filter type spectral imager. Mass of the spectral imager will be less than 400 grams, and dimensions will be approximately 80 mm x 80 mm x 45 mm. The spectral imager is based on a tunable Fabry-Pérot interferometer (FPI) accompanied by an RGB CMOS image sensor. The FPI consists of two highly reflective surfaces separated by a tunable air gap and it is based either on a microelectromechanical (MEMS) or piezo-actuated structure. The MEMS FPI is a monolithic device, i.e. it is made entirely on one substrate in a batch process, without assembling separate pieces together. The gap is adjusted by moving the upper mirror with electrostatic force. Benefits of the MEMS FPI are low mass and small size. However, large aperture (2-10 mm) MEMS FPIs are currently under development, thus it is not yet known if their performance is adequate. The piezo-actuated FPI uses three piezo-actuators and is controlled in a closed capacitive feedback loop. The drawback of the piezo-actuated FPI is its higher mass. However, it has a large aperture which enables a shorter exposure times. Selection of the FPI type will be done after thorough evaluation. Depending on the selected FPI type, the spectral resolution of the imager will be 5 - 10 nm at full width at half maximum and it will operate in the visible and/or near infrared range
Original languageEnglish
Title of host publicationSensors, Systems, and Next-Generation Satellites XV
EditorsMeynart Roland
PublisherInternational Society for Optics and Photonics SPIE
Number of pages8
ISBN (Print)978-0-8194-8803-9
DOIs
Publication statusPublished - 2011
MoE publication typeA4 Article in a conference publication
EventSensors, Systems, and Next-Generation Satellites XV. SPIE Remote Sensing - Prague, Czech Republic
Duration: 19 Sep 201122 Sep 2011

Publication series

NameProceedings of SPIE
PublisherSPIE
Volume8176
ISSN (Print)0277-786X

Conference

ConferenceSensors, Systems, and Next-Generation Satellites XV. SPIE Remote Sensing
CountryCzech Republic
CityPrague
Period19/09/1122/09/11

Fingerprint

nanosatellites
interferometers
microelectromechanical systems
apertures
Finland
tunable filters
theses
assembling
payloads
spectral resolution
students
CMOS
actuators
electrostatics
mirrors
evaluation

Keywords

  • Nanosatellite
  • spectral imager
  • Fabry-Pérot Interferometer
  • piezo actuator

Cite this

Mannila, R., Näsilä, A., Praks, J., Saari, H., & Antila, J. (2011). Miniaturized spectral imager for Aalto-1 nanosatellite. In M. Roland (Ed.), Sensors, Systems, and Next-Generation Satellites XV [817628] International Society for Optics and Photonics SPIE. Proceedings of SPIE, Vol.. 8176 https://doi.org/10.1117/12.897999
Mannila, Rami ; Näsilä, Antti ; Praks, Jaan ; Saari, Heikki ; Antila, Jarkko. / Miniaturized spectral imager for Aalto-1 nanosatellite. Sensors, Systems, and Next-Generation Satellites XV. editor / Meynart Roland. International Society for Optics and Photonics SPIE, 2011. (Proceedings of SPIE, Vol. 8176).
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Mannila, R, Näsilä, A, Praks, J, Saari, H & Antila, J 2011, Miniaturized spectral imager for Aalto-1 nanosatellite. in M Roland (ed.), Sensors, Systems, and Next-Generation Satellites XV., 817628, International Society for Optics and Photonics SPIE, Proceedings of SPIE, vol. 8176, Sensors, Systems, and Next-Generation Satellites XV. SPIE Remote Sensing , Prague, Czech Republic, 19/09/11. https://doi.org/10.1117/12.897999

Miniaturized spectral imager for Aalto-1 nanosatellite. / Mannila, Rami; Näsilä, Antti; Praks, Jaan; Saari, Heikki; Antila, Jarkko.

Sensors, Systems, and Next-Generation Satellites XV. ed. / Meynart Roland. International Society for Optics and Photonics SPIE, 2011. 817628 (Proceedings of SPIE, Vol. 8176).

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

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N2 - The Aalto-1 is a 3U-cubesat project coordinated by Aalto University. The satellite, Aalto-1, will be mainly built by students as project assignments and thesis works. VTT Technical Research Centre of Finland will develop the main Earth observation payload, a miniaturized spectral imager, for the satellite. It is a novel highly miniaturized tunable filter type spectral imager. Mass of the spectral imager will be less than 400 grams, and dimensions will be approximately 80 mm x 80 mm x 45 mm. The spectral imager is based on a tunable Fabry-Pérot interferometer (FPI) accompanied by an RGB CMOS image sensor. The FPI consists of two highly reflective surfaces separated by a tunable air gap and it is based either on a microelectromechanical (MEMS) or piezo-actuated structure. The MEMS FPI is a monolithic device, i.e. it is made entirely on one substrate in a batch process, without assembling separate pieces together. The gap is adjusted by moving the upper mirror with electrostatic force. Benefits of the MEMS FPI are low mass and small size. However, large aperture (2-10 mm) MEMS FPIs are currently under development, thus it is not yet known if their performance is adequate. The piezo-actuated FPI uses three piezo-actuators and is controlled in a closed capacitive feedback loop. The drawback of the piezo-actuated FPI is its higher mass. However, it has a large aperture which enables a shorter exposure times. Selection of the FPI type will be done after thorough evaluation. Depending on the selected FPI type, the spectral resolution of the imager will be 5 - 10 nm at full width at half maximum and it will operate in the visible and/or near infrared range

AB - The Aalto-1 is a 3U-cubesat project coordinated by Aalto University. The satellite, Aalto-1, will be mainly built by students as project assignments and thesis works. VTT Technical Research Centre of Finland will develop the main Earth observation payload, a miniaturized spectral imager, for the satellite. It is a novel highly miniaturized tunable filter type spectral imager. Mass of the spectral imager will be less than 400 grams, and dimensions will be approximately 80 mm x 80 mm x 45 mm. The spectral imager is based on a tunable Fabry-Pérot interferometer (FPI) accompanied by an RGB CMOS image sensor. The FPI consists of two highly reflective surfaces separated by a tunable air gap and it is based either on a microelectromechanical (MEMS) or piezo-actuated structure. The MEMS FPI is a monolithic device, i.e. it is made entirely on one substrate in a batch process, without assembling separate pieces together. The gap is adjusted by moving the upper mirror with electrostatic force. Benefits of the MEMS FPI are low mass and small size. However, large aperture (2-10 mm) MEMS FPIs are currently under development, thus it is not yet known if their performance is adequate. The piezo-actuated FPI uses three piezo-actuators and is controlled in a closed capacitive feedback loop. The drawback of the piezo-actuated FPI is its higher mass. However, it has a large aperture which enables a shorter exposure times. Selection of the FPI type will be done after thorough evaluation. Depending on the selected FPI type, the spectral resolution of the imager will be 5 - 10 nm at full width at half maximum and it will operate in the visible and/or near infrared range

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KW - spectral imager

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KW - piezo actuator

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Mannila R, Näsilä A, Praks J, Saari H, Antila J. Miniaturized spectral imager for Aalto-1 nanosatellite. In Roland M, editor, Sensors, Systems, and Next-Generation Satellites XV. International Society for Optics and Photonics SPIE. 2011. 817628. (Proceedings of SPIE, Vol. 8176). https://doi.org/10.1117/12.897999