Research Output

2020

Calibration of Near-Infrared Detectors Using a Wavelength Tunable Light Source

Maham, K., Vaskuri, A., Manoocheri, F. & Ikonen, E., 2020, In : OPTICAL REVIEW.

Research output: Contribution to journalConference articleScientificpeer-review

Open Access
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19 Downloads (Pure)

Cryostat setup for measuring spectral and electrical properties of light-emitting diodes at junction temperatures from 81 K to 297 K

Martikainen, E., Vaskuri, A., Dönsberg, T. & Ikonen, E., 1 Jan 2020, In : Review of Scientific Instruments. 91, 1, 015106.

Research output: Contribution to journalArticleScientificpeer-review

Open Access
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29 Downloads (Pure)

Determining the shape of reflectance reference samples for curved surface reflectors

Lanevski, D., Manoocheri, F., Vaskuri, A., Hameury, J., Kersting, R., Monte, C., Adibekyan, A., Kononogova, E. & Ikonen, E., 1 Jan 2020, In : Measurement Science and Technology. 31, 5, 054010.

Research output: Contribution to journalArticleScientificpeer-review

Open Access
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5 Downloads (Pure)

Evaluating the performance of a double integrating sphere in measurement of reflectance, transmittance, and albedo of coniferous needles

Hovi, A., Mõttus, M., Juola, J., Manoocheri, F., Ikonen, E. & Rautiainen, M., 1 Jan 2020, In : Silva Fennica. 54, 2, 10270.

Research output: Contribution to journalArticleScientificpeer-review

Open Access
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22 Downloads (Pure)

Measurement setup for differential spectral responsivity of solar cells

Kärhä, P., Baumgartner, H., Askola, J., Kylmänen, K., Oksanen, B., Maham, K., Huynh, V. & Ikonen, E., 1 Jan 2020, In : OPTICAL REVIEW.

Research output: Contribution to journalConference articleScientificpeer-review

Open Access
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32 Downloads (Pure)

Predictable quantum efficient detector for low optical flux measurements

Porrasmaa, S., Dönsberg, T., Manoocheri, F. & Ikonen, E., 1 Feb 2020, In : OPTICAL REVIEW. 5 p.

Research output: Contribution to journalConference articleScientificpeer-review

Open Access
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20 Downloads (Pure)
2019

Accelerated ageing of organic LED panels using ultraviolet exposure

Askola, J., Çalkin, Y., Vaskuri, A., Poikonen, T. & Ikonen, E., Dec 2019, In : Lighting Research and Technology. 51, p. 1263-1274

Research output: Contribution to journalArticleScientificpeer-review

Broadband electromagnetic radiation detector based on photoacoustic effect

Rossi, J., Uotila, J., Laurila, T., Ikonen, E. & Vainio, M., 2019, p. 89-90.

Research output: Contribution to conferenceAbstractScientific

Comparison of the fisheye camera method with goniophotometers for measuring relative angular intensity distributions of light sources

Kokka, A., Pulli, T., Ferrero, A., Dekker, P., Kliment, P., Klej, A., Gerloff, T., Ludwig, K., Poikonen, T. & Ikonen, E., 2019, p. 117-118.

Research output: Contribution to conferenceAbstractScientific

Constant-voltage driven temperature stabilized luminous flux LED standard lamp with E27 base

Dönsberg, T., Pulli, T., Klej, A. & Ikonen, E., 2019, p. 46-47.

Research output: Contribution to conferenceAbstractScientific

Flat-field calibration method for hyperspectral frame cameras

Kokka, A., Pulli, T., Honkavaara, E., Markelin, L., Kärhä, P. & Ikonen, E., 6 Aug 2019, In : Metrologia. 8 p., 055001.

Research output: Contribution to journalArticleScientificpeer-review

Open Access
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91 Downloads (Pure)

General tool for estimating effects of unknown correlations on spectral integrals

Pulli, T., Vaskuri, A., Kärhä, P., Mäntynen, H. & Ikonen, E., 2019, p. 186-187.

Research output: Contribution to conferenceAbstractScientific

Influence of smart lighting control on the lifetime of high power LED luminaires

Askola, J., Baumgartner, H., Pulli, T., Kärhä, P. & Ikonen, E., 1 Jan 2019, In : IOP Conference Series: Earth and Environmental Science. 352, 1, 012043.

Research output: Contribution to journalConference articleScientificpeer-review

Open Access
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29 Downloads (Pure)

Luminous intensity comparison based on new standard lamps with LED reference spectrum

Gerloff, T., Kallenbach, L., Ledig, J., Schrader, C., Sperling, A., Pulli, T., Askola, J., Smid, M., Kliment, P., Pons, A., Ferrero, A., Gal, P., Brida, G., Blattner, P., Stuker, F., Schneider, M., Dönsberg, T. & Poikonen, T., 2019, Proceedings of the 29th CIE Session. CIE, p. 77-84

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientific

Open Access
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26 Downloads (Pure)

Natural and accelerated ageing of organic LED panels using spectrally dispersed ultraviolet exposure

Askola, J., Vaskuri, A., Poikonen, T. & Ikonen, E., 2019, p. 240-241.

Research output: Contribution to conferenceAbstractScientific

Optical Characterization of III-V Multijunction Solar Cells for Temperature-Independent Band Gap Features

Baumgartner, H., Oksanen, B., Kärhä, P. & Ikonen, E., Nov 2019, In : IEEE Journal of Photovoltaics. 9, 6, p. 1631-1636 6 p.

Research output: Contribution to journalArticleScientificpeer-review

Open Access
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19 Downloads (Pure)

Predictable Quantum Efficient Detector (PQED) based on n-type silicon induced junction photodiodes

Dönsberg, T., Porrasmaa, S., Manoocheri, F. & Ikonen, E., 2019, p. 95-96.

Research output: Contribution to conferenceAbstractScientific

Proceedings of OIE 2019: The 13th Japan-Finland Joint Symposium on Optics in Engineering26-30 August 2019, in Espoo and Tallinn

Kärhä, P. (ed.), Ikonen, E. (ed.), Peiponen, K-E. (ed.) & Hayasaki, Y. (ed.), 2019, Espoo, Finland: Aalto University. 117 p.

Research output: Book/ReportAnthologyScientific

Open Access

Reduced lifetime of LED street luminaires due to adaptive control

Askola, J., Baumgartner, H., Pulli, T., Kärhä, P. & Ikonen, E., 2019, p. 214-215.

Research output: Contribution to conferenceAbstractScientific

Setup for characterising the spectral responsivity of Fabry-Perot-interferometer-based hyperspectral cameras

Pekkala, O., Pulli, T., Kokka, A. & Ikonen, E., Dec 2019, In : Metrologia. 56, 6, 6 p., 065005.

Research output: Contribution to journalArticleScientificpeer-review

Open Access
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28 Downloads (Pure)

Setup for characterising the spectral responsivity of Fabry-Perot-interferometer-based hyperspectral cameras

Pekkala, O., Pulli, T., Kokka, A. & Ikonen, E., 2019, p. 39-40.

Research output: Contribution to conferenceAbstractScientific

Setup for characterizing the spectral responsivity of Fabry-Perot-interferometer-based hyperspectral cameras

Pekkala, O., Pulli, T., Kokka, A. & Ikonen, E., 2019, p. 206-207.

Research output: Contribution to conferenceAbstractScientific

Spatial and Spectral Corrections for Integrating Sphere Photometry and Radiometry

Kokka, A., 2019, Aalto University. 103 p.

Research output: ThesisDoctoral ThesisCollection of Articles

Transconductance amplifier for optical metrology applications of light-emitting diodes

Dönsberg, T., Poikonen, T. & Ikonen, E., 2019, In : IEEE Transactions on Instrumentation and Measurement.

Research output: Contribution to journalArticleScientificpeer-review

Open Access

Validation of the fisheye camera method for spatial non-uniformity corrections in luminous flux measurements with integrating spheres

Kokka, A., Pulli, T., Ferrero, A., Dekker, P., Thorseth, A., Kliment, P., Klej, A., Gerloff, T., Ludwig, K., Poikonen, T. & Ikonen, E., 18 Jun 2019, In : Metrologia. 56, 4, p. 045002 9 p.

Research output: Contribution to journalArticleScientificpeer-review

Open Access
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83 Downloads (Pure)
2018

Development of white LED illuminants for colorimetry and recommendation of white LED reference spectrum for photometry

Kokka, A., Poikonen, T., Blattner, P., Jost, S., Ferrero, A., Pulli, T., Ngo, M., Thorseth, A., Gerloff, T., Dekker, P., Stuker, F., Klej, A., Ludwig, K., Schneider, M., Reiners, T. & Ikonen, E., Aug 2018, In : Metrologia. 55, 4, p. 526-534 9 p.

Research output: Contribution to journalArticleScientificpeer-review

Open Access
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2 Citations (Scopus)
122 Downloads (Pure)

Key comparison CCPR-K1.a as an interlaboratory comparison of correlated color temperature

Karha, P., Vaskuri, A., Pulli, T. & Ikonen, E., 2 Mar 2018, In : Journal of Physics: Conference Series. 972, 1, 4 p., 012012.

Research output: Contribution to journalConference articleScientificpeer-review

Open Access
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1 Citation (Scopus)
81 Downloads (Pure)

LED based reference for wavelength and relative intensity

Baumgartner, H., Kylmanen, K., Kantamaa, O., Karha, P. & Ikonen, E., 2 Mar 2018, In : Journal of Physics: Conference Series. 972, 1, 5 p., 012010.

Research output: Contribution to journalConference articleScientificpeer-review

Open Access
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1 Citation (Scopus)
89 Downloads (Pure)

Liquid nitrogen cryostat for predictable quantum efficient detectors

Manoocheri, F., Dönsberg, T., Sildoja, M., Smid, M., Porrovecchio, G. & Ikonen, E., 2 Mar 2018, In : Journal of Physics: Conference Series. 972, 1, 3 p., 012021.

Research output: Contribution to journalConference articleScientificpeer-review

Open Access
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1 Citation (Scopus)
90 Downloads (Pure)

Out-of-Range Stray Light Characterization of Single-Monochromator Brewer Spectrophotometers

Pulli, T., Karppinen, T., Nevas, S., Kärhä, P., Lakkala, K., Karhu, J., Sildoja, M-M., Vaskuri, A., Shpak, M., Manoocheri, F., Doppler, L., Gross, S., Mes, J. & Ikonen, E., 2018, In : ATMOSPHERE: OCEAN. 56, 1, p. 1-11 11 p.

Research output: Contribution to journalArticleScientificpeer-review

Open Access
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109 Downloads (Pure)

Relationships between junction temperature, electroluminescence spectrum and ageing of light-emitting diodes

Vaskuri, A., Kärhä, P., Baumgartner, H., Kantamaa, O., Pulli, T., Poikonen, T. & Ikonen, E., 15 Mar 2018, In : Metrologia. 55, 2, p. S86-S95

Research output: Contribution to journalArticleScientificpeer-review

Open Access
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17 Citations (Scopus)
147 Downloads (Pure)

Toward SI Traceability of a Monte Carlo Radiative Transfer Model in the Visible Range

Jaanson, P., Bialek, A., Greenwell, C., Mantynen, H., Widlowski, J. L., Manoocheri, F., Lassila, A., Fox, N. & Ikonen, E., Mar 2018, In : IEEE Transactions on Geoscience and Remote Sensing. 56, 3, p. 1360 - 1373

Research output: Contribution to journalArticleScientificpeer-review

Uncertainty analysis of total ozone derived from direct solar irradiance spectra in the presence of unknown spectral deviations

Vaskuri, A., Kärhä, P., Egli, L., Gröbner, J. & Ikonen, E., 20 Jun 2018, In : Atmospheric Measurement Techniques. 11, 6, p. 3595-3610 16 p.

Research output: Contribution to journalArticleScientificpeer-review

Open Access
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1 Citation (Scopus)
102 Downloads (Pure)
2017

Characterizing an integrating sphere photometer for measurements of solid-state lighting panels

Askola, J., Poikonen, T., Pulli, T. & Ikonen, E., 2017, Proceedings of the Conference on "Smarter Lighting for Better Life" at the CIE Midterm Meeting 2017. CIE, p. 538-543

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientific

Experimental demonstration of a predictable single photon source with variable photon flux

Vaigu, A., Porrovecchio, G., Chu, X. L., Lindner, S., Smid, M., Manninen, A., Becher, C., Sandoghdar, V., Götzinger, S. & Ikonen, E., 21 Mar 2017, In : Metrologia. 54, 2, p. 218-223 6 p.

Research output: Contribution to journalArticleScientificpeer-review

6 Citations (Scopus)

Facility for Determining Action Spectra of UV Photodegradation

Vaskuri, A., Kärhä, P., Anu, H. & Ikonen, E., 2017, Radiation Processes in the Atmosphere and Ocean (IRS2016): Proceedings of the International Radiation Symposium (IRC/IAMAS). Davies, R., Egli, L. & Schmutz, W. (eds.). p. 1-4 4 p. 110011. (AIP Conference Proceedings; vol. 1810).

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

1 Citation (Scopus)

Fisheye camera method for spatial non-uniformity corrections in luminous flux measurements with integrating spheres

Kokka, A., Pulli, T., Poikonen, T., Askola, J. & Ikonen, E., 24 Jul 2017, In : Metrologia. 54, 4, p. 577-583 7 p.

Research output: Contribution to journalArticleScientificpeer-review

Open Access
File
2 Citations (Scopus)
157 Downloads (Pure)

Fisheye camera system for determining spatial non-uniformity corrections in luminous efficacy measurements with integrating spheres

Kokka, A., Pulli, T., Poikonen, T., Askola, J. & Ikonen, E., 2017, Proceedings of the Conference on "Smarter Lighting for Better Life" at the CIE Midterm Meeting 2017. CIE, p. 203-207

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientific

Method for estimating effects of unknown correlations in spectral irradiance data on uncertainties of spectrally integrated colorimetric quantities

Karha, P., Vaskuri, A., Mäntynen, H., Mikkonen, N. & Ikonen, E., 18 Jul 2017, In : Metrologia. 54, 4, p. 524-534 11 p.

Research output: Contribution to journalArticleScientificpeer-review

4 Citations (Scopus)

Monte Carlo analysis of uncertainty of total atmospheric ozone derived from measured spectra

Kärhä, P., Vaskuri, A., Gröbner, J., Egli, L. & Ikonen, E., 2017, RADIATION PROCESSES IN THE ATMOSPHERE AND OCEAN: International Radiation Symposium (IRC/IAMAS) - Radiation Processes in the Atmosphere and Ocean. American Institute of Physics, 4 p. 110005. (AIP Conference Proceedings; vol. 1810).

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

2 Citations (Scopus)

Nonlinearity characterization of array spectroradiometers for the solar UV measurements

Pulli, T., Nevas, S., Gawhary, O. E., Van Den Berg, S., Askola, J., Kärhä, P., Manoocheri, F. & Ikonen, E., 10 Apr 2017, In : Applied Optics. 56, 11, p. 3077-3086 10 p.

Research output: Contribution to journalArticleScientificpeer-review

7 Citations (Scopus)

Predictable quantum efficient detector based on n-type silicon photodiodes

Dönsberg, T., Manoocheri, F., Sildoja, M., Juntunen, M., Savin, H., Tuovinen, E., Ronkainen, H., Prunnila, M., Merimaa, M., Tang, C. K., Gran, J., Mueller, I., Werner, L., Rougie, B., Pons, A., Smid, M., Gal, P., Lolli, L., Brida, G., Rastello, M. L. & 1 others, Ikonen, E., Dec 2017, In : Metrologia. 54, 6, p. 821-836 16 p.

Research output: Contribution to journalArticleScientificpeer-review

Open Access
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5 Citations (Scopus)
349 Downloads (Pure)

Tutorial: Road Lighting for Efficient and Safe Traffic Environments

Tetri, E., Bozorg Chenani, S., Räsänen, R-S., Baumgartner, H., Vaaja, M., Sierla, S., Tähkämö, L., Virtanen, J-P., Kurkela, M., Ikonen, E., Halonen, L., Hyyppä, H. & Kosonen, I., 19 Feb 2017, In : LEUKOS. 13, 4, p. 223-241 19 p.

Research output: Contribution to journalArticleScientificpeer-review

9 Citations (Scopus)
2016

A reference material with close to Lambertian reflectance and fluorescence emission profiles

Jaanson, P., Pulli, T., Manoocheri, F. & Ikonen, E., 6 Sep 2016. 1 p.

Research output: Contribution to conferencePaperScientific

A reference material with close to Lambertian reflectance and fluorescence emission profiles

Jaanson, P., Pulli, T., Manoocheri, F. & Ikonen, E., 4 Nov 2016, In : Metrologia. 53, 6, p. 1330-1338 9 p.

Research output: Contribution to journalArticleScientificpeer-review

1 Citation (Scopus)

Goniometrical measurements of fluorescence quantum efficiency

Jaanson, P., Manoocheri, F. & Ikonen, E., 6 Jan 2016, In : Measurement Science and Technology. 27, 2, 025204.

Research output: Contribution to journalArticleScientificpeer-review

3 Citations (Scopus)

Model for simulating uncertainties of TOC from multispectral measurements

Kärhä, P., Vaskuri, A., Nikke, M., Gröbner, J., Egli, L. & Ikonen, E., 20 May 2016.

Research output: Contribution to conferencePaperScientific

Natural and accelerated ageing of LED lamps

Baumgartner, H., Renoux, D., Kärhä, P., Poikonen, T., Pulli, T. & Ikonen, E., 1 Dec 2016, In : Lighting Research and Technology. 48, 8, p. 930-942 13 p.

Research output: Contribution to journalArticleScientificpeer-review

7 Citations (Scopus)

Optical aperture area determination for accurate illuminance and luminous efficacy measurements of LED lamps

Dönsberg, T., Mäntynen, H. & Ikonen, E., Jun 2016, In : OPTICAL REVIEW. 23, 3, p. 510–521 12 p.

Research output: Contribution to journalArticleScientificpeer-review

2 Citations (Scopus)

Review of challenges and disadvantages of possible LED-based photometric standards

Poikonen, T., Pulli, T., Dönsberg, T., Baumgartner, H., Kärhä, P. & Ikonen, E., 2016, Proceedings of CIE 2016 Lighting Quality and Energy Efficiency, Melbourne, Australia. CIE

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