Altti Akujärvi

20122018
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Research Output 2012 2018

2018
5 Citations (Scopus)

Hand-held MEMS hyperspectral imager for VNIR mobile applications

Näsilä, A., Trops, R., Stuns, I., Havia, T., Saari, H., Guo, B., Ojanen, H. J., Akujärvi, A. & Rissanen, A., 1 Jan 2018, MOEMS and Miniaturized Systems XVII. International Society for Optics and Photonics SPIE, 105450R. (Proceedings of SPIE, Vol. 10545).

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

Mobile Applications
Imager
Micro-electro-mechanical Systems
Image sensors
microelectromechanical systems
2017
3 Citations (Scopus)

Visible, very near IR and short wave IR hyperspectral drone imaging system for agriculture and natural water applicationS

Saari, H., Akujärvi, A., Holmlund, C., Ojanen, H., Kaivosoja, J., Nissinen, A. & Niemeläinen, O., 19 Oct 2017, Frontiers in Spectral imaging and 3D Technologies for Geospatial Solutions. Honkavaara, E., Hu, B., Karantzalos, K., Liang, X., Müller, R., Nocerino, E., Pölönen, I. & Rönnholm, P. (eds.). International Society for Photogrammetry and Remote Sensing ISPRS, p. 165-170 (International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Vol. XLII-3W3).

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

Open Access
Imaging systems
Agriculture
agriculture
grass
Infrared radiation
5 Citations (Scopus)

VTT's Fabry-Perot interferometer technologies for hyperspectral imaging and mobile sensing applications

Rissanen, A., Guo, B., Saari, H., Näsilä, A., Mannila, R., Akujärvi, A. & Ojanen, H., 1 Jan 2017, MOEMS and Miniaturized Systems XVI. Piyawattanametha, W. & Park, Y-H. (eds.). International Society for Optics and Photonics SPIE, Vol. 10116. 101160I. (Proceedings of SPIE, Vol. 10116).

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

Fabry-Perot Interferometer
Fabry-Perot interferometers
Hyperspectral Imaging
Sensing
Sensor
2016
5 Citations (Scopus)

MOEMS FPI sensors for NIR-MIR microspectrometer applications

Akujärvi, A., Guo, B., Mannila, R. & Rissanen, A., 1 Jan 2016, MOEMS and Miniaturized Systems XV. International Society for Optics and Photonics SPIE, Vol. 9760. 97600M

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

MOEMS
Fabry-Perot Interferometer
microoptoelectromechanical systems
Fabry-Perot interferometers
Micro-electro-mechanical Systems
2 Citations (Scopus)

Picasso VISION instrument design, engineering model test results, and flight model development status

Näsilä, A., Holmlund, C., Mannila, R., Näkki, I., Ojanen, H. J., Akujärvi, A., Saari, H., Fussen, D., Pieroux, D. & Demoulin, P., 2016, Proceedings of Remote Sensing of Clouds and the Atmosphere XXI. International Society for Optics and Photonics SPIE, (Proceedings of SPIE, Vol. 10001).

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

model test
flight
engineering
development model
test
2014

Aalto-1 spectral imager status update: Towards flight model

Näsilä, A., Akujärvi, A., Holmlund, C., Kantojärvi, U., Mannila, R., Mäkynen, J., Näkki, I., Antila, T., Saari, H., Toivanen, H. & Viherkanto, K., 2014.

Research output: Contribution to conferenceConference articleScientific

1 Citation (Scopus)

MEMS Fabry-Perot interferometer with Si-air mirrors for mid-and thermal infrared

Tuohiniemi, M., Näsilä, A. & Akujärvi, A., 2014, Proceedings of SPIE: Volume 8977, MOEMS and Miniaturized Systems XIII, 2014. International Society for Optics and Photonics SPIE, 10 p. 89770G. (Proceedings of SPIE, Vol. 8977).

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

Fabry-Perot interferometers
microelectromechanical systems
mirrors
air
infrared interferometers
2013
23 Citations (Scopus)

Miniaturized hyperspectral imager calibration and UAV flight campaigns

Saari, H., Pölönen, I., Salo, H., Honkavaara, E., Hakala, T., Holmlund, C., Mäkynen, J., Mannila, R., Antila, T. & Akujärvi, A., 2013, Sensors, Systems, and Next-Generation Satellites XVII. International Society for Optics and Photonics SPIE, 88891O. (Proceedings of SPIE, Vol. 8889).

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

flight
calibration
wavelength
interferometer
summer
2012

Gap quality measurements of flat-mirror Fabry-Pérot interferometers

Akujärvi, A., Antila, J. & Saari, H., 2012.

Research output: Contribution to conferenceConference articleScientific

MOEMS miniature spectrometers using tuneable Fabry-Perot interferometers

Rissanen, A., Akujärvi, A., Antila, J., Blomberg, M. & Saari, H., 2012, In : Journal of Micro/ Nanolithography, MEMS, and MOEMS. 11, 2, 6 p., 023003.

Research output: Contribution to journalArticleScientificpeer-review

MOEMS
microoptoelectromechanical systems
Fabry-Perot interferometers
Spectrometers
spectrometers
21 Citations (Scopus)

Optical transmission performance of a surface-micromachined Fabry-Pérot interferometer for thermal infrared

Tuohiniemi, M., Blomberg, M., Akujärvi, A., Antila, J. & Saari, H., 2012, In : Journal of Micromechanics and Microengineering. 22, 11, 115004.

Research output: Contribution to journalArticleScientificpeer-review

Light transmission
Interferometers
Infrared radiation
Wavelength
Bandwidth

The Aalto-1 Spectral Imager (AaSI) mission

Näsilä, A., Antila, J., Akujärvi, A., Holmlund, C., Kantojärvi, U., Mannila, R., Mäkynen, J., Näkki, I., Rissanen, A., Saari, H., Toivanen, H. & Viherkanto, K., 2012.

Research output: Contribution to conferenceOther conference contributionScientific

UASI potato monitoring flight campaign preliminary results

Kaivosoja, J., Pesonen, L., Saari, H., Mäkynen, J., Akujärvi, A., Tuomisto, J., Knaapi, J. & Raski, P., 2012, Finnish Remote Sensing Days 2012: Book of abstracts. University of Helsinki, p. 18 1 p.

Research output: Chapter in Book/Report/Conference proceedingConference abstract in proceedingsScientific

Open Access