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

    SeriesProceedings of SPIE
    Volume8176
    ISSN0277-786X

    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).
    @inproceedings{b446df0dd0e64c7588b62a9b6cc62b76,
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    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-P{\'e}rot 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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    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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    AU - Saari, Heikki

    AU - Antila, Jarkko

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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

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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