Tuomas Poikonen

20122019
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Research Output 2012 2019

  • 11 Article
  • 2 Conference article in proceedings
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Article
2019

Accelerated ageing of organic LED panels using ultraviolet exposure

Askola, J., Calkin, Y., Vaskuri, A., Poikonen, T. & Ikonen, E., 1 Dec 2019, In : Lighting Research and Technology. 51, 8, p. 1263-1274 12 p.

Research output: Contribution to journalArticleScientificpeer-review

Light emitting diodes
Aging of materials
Ultraviolet radiation
Wavelength
Networks (circuits)

Transconductance amplifier for optical metrology applications of light-emitting diodes

Dönsberg, T., Poikonen, T. & Ikonen, E., 16 Aug 2019, In : IEEE Transactions on Instrumentation and Measurement. 7 p.

Research output: Contribution to journalArticleScientificpeer-review

Open Access
Transconductance
transconductance
metrology
Light emitting diodes
light emitting diodes

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, 045002.

Research output: Contribution to journalArticleScientificpeer-review

Open Access
Cameras
Fluxes
Electric lamps
Light emitting diodes
2018
1 Citation (Scopus)

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., 28 Jun 2018, In : Metrologia. 55, 4, p. 526-534 9 p.

Research output: Contribution to journalArticleScientificpeer-review

Open Access
Colorimetry
Photometry
Light emitting diodes
Photometers
Calibration

Multiple transfer standard for calibration and characterization of test setups for LED lamps and luminaires in industry

Sperling, A., Meyer, M., Pendsa, S., Jordan, W., Poikonen, T., Renoux, D. & Blattner, P., 2 Feb 2018, In : Metrologia. 55, 2, p. S37-S42

Research output: Contribution to journalArticleScientificpeer-review

Lighting fixtures
Electric lamps
Light emitting diodes
Calibration
Industry
13 Citations (Scopus)

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
Electroluminescence
Light emitting diodes
Aging of materials
Temperature
Electric lamps
2017
2 Citations (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
Electric lamps
Cameras
Fluxes
Light emitting diodes
Angular distribution
2016
7 Citations (Scopus)

Natural and accelerated ageing of LED lamps

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

Research output: Contribution to journalArticleScientificpeer-review

Electric lamps
Light emitting diodes
Aging of materials
Heating
Temperature
2013
8 Citations (Scopus)

Spectrally adjustable quasi-monochromatic radiance source based on LEDs and its application for measuring spectral responsivity of a luminance meter

Hirvonen, J-M., Poikonen, T., Vaskuri, A., Kärhä, P. & Ikonen, E., 2013, In : Measurement Science and Technology. 24, 11, 8 p., 115201.

Research output: Contribution to journalArticleScientificpeer-review

Responsivity
Luminance
Radiance
luminance
radiance
2012
10 Citations (Scopus)

Luminous efficacy measurement of solid-state lamps

Poikonen, T., Pulli, T., Vaskuri, A., Baumgartner, H., Kärhä, P. & Ikonen, E., 2012, In : Metrologia. 49, 2, p. 135-140 5 p.

Research output: Contribution to journalArticleScientificpeer-review

Electric lamps
Fluxes
Electronic equipment
Harmonic distortion
4 Citations (Scopus)

Uncertainty analysis of photometer directional response index f2 using Monte Carlo simulation

Poikonen, T., Blattner, P., Kärhä, P. & Ikonen, E., 2012, In : Metrologia. 49, 6, p. 727-736 9 p.

Research output: Contribution to journalArticleScientificpeer-review

Photometers
Uncertainty analysis
Distance measurement
Monte Carlo simulation
Light sources