Department of Electrical Engineering and Automation

Metrology Research Institute

Metrology Research Institute focuses on optical radiation measurements and related activities.
Metrology research group, Xenon lamp. Photo by the research group

Light is everywhere around us in the form of sunlight, artificial lighting and signaling. Most electrical equipment use either visible or infrared radiation for signaling, displays, sensing, data read-out, or digital communication. Colour is one of the most significant properties in consumer products.

Metrology research of optical radiation measurements is divided into three branches:

  • Radiometry deals with characteristics of light sources and detectors
  • Photometry studies light as humans see it, and
  • Spectrophotometry investigates optical components as well as the optical properties of materials.

Some of the facilities, developed in the laboratory, are at world-leading level, when comparing accuracy, compactness, and operating costs. The group's research concentrates on electronics, modern optics and optical radiation measurements.

Metrology Research Institute is a joint laboratory between Aalto University and MIKES. It is involved in many national and international projects. Most of the research in the laboratory is currently carried out within the frameworks of EURAMET (European Association for Metrology) EPM (European Partnership for Metrology, 2021-2027), EMPIR (European Metrology Programme for Innovation and Research, 2014-2020), and EMRP (European Metrology Research Programme 2009-2013).

The Institute is the national standards laboratory for optical quantities in Finland, maintaining national standards of optical quantities and carrying out calibrations at the highest level. It has self-declared ISO 17025 compliance, participating in intercomparisons of CCPR (Consultative Commitee for Photometry and Radiometry) of BIPM (Bureau International de Poids et Mesures).

The research group is led by Professor Erkki Ikonen. See our detailed project descriptions for information about specific contact persons for each activity.

Research areas

Find out more about the key research areas of the Metrology Research Institute. The pages contain information about our latest projects. For information about our older projects see our Annual Reports Database.

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Photometry is the measurement of visible light as perceived by humans. Our current focus is on increasing the accuracy of the energy efficiency measurements of novel light sources, such as LEDs and OLEDs.

Department of Electrical Engineering and Automation
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Radiometry deals with techniques for measuring electromagnetic radiation, in the form of ultraviolet radiation, visible light, and infrared radiation.

Department of Electrical Engineering and Automation
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Spectrophotometry focuses on measuring the amount of light that a sample or an object absorbs or reflects as a function of wavelength using an instrument known as a spectrophotometer.

Department of Electrical Engineering and Automation
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Electrical instrumentation

Off-the-shelf measurement equipment are not always available, and dedicated measurement devices are often built at Metrology Research Institute.

Department of Electrical Engineering and Automation

Latest publications

Differential Spectral Responsivity of Solar Cells Measured with an LED Based Experimental Setup

Afsaneh Eghbali Yeldagermani, Erkki Ikonen, Petri Karha 2024 2023 Middle East and North Africa Solar Conference, MENA-SC 2023 - Proceedings

Survey of bidirectional transmittance distribution function measurement facilities by multilateral scale comparisons

Jinglin Fu, Alejandro Ferrero, Tatjana Quast, Michael Esslinger, Pablo Santafé-Gabarda, Néstor Tejedor, Joaquín Campos, Lou Gevaux, Gaël Obein, Robin Aschan, Farshid Manoocheri, Erkki Ikonen, Geiland Porrovecchio, Marek Šmíd, Ellie Molloy, Annette Koo, Søren A. Jensen, Rafael Oser, Jan Audenaert, Youri Meuret, Stefan Källberg, Iryna Gozhyk, Tobias Kraus, Alfred Schirmacher 2024 Metrologia

Recent advances and perspectives in photometry in the era of LED lighting

Erkki Ikonen 2024 Measurement Science and Technology

Spectral analysis of deviations from key comparison reference values

Kinza Maham, Vili Kosonen, Juha Peltoniemi, Petri Kärhä, Erkki Ikonen 2024 Metrologia

Characterization of PillarHall test chip structures using a reflectometry technique

Aleksandr Danilenko, Masoud Rastgou, Farshid Manoocheri, Jussi Kinnunen, Virpi Korpelainen, Antti Lassila, Erkki Ikonen 2023 Measurement Science and Technology

Sensitive Detection of Metal Concentrations in Aqueous Solution Using Real-Time Micro-Plasma Emission Spectroscopy

Sudatta Das, Kalle Blomberg von der Geest, Ari Mäkinen, Aappo Roos, Erkki Ikonen, Toni Laurila 2023 Analytical Letters

Development of primary reference facilities and measurement comparison of standard artifacts for the bidirectional transmittance distribution function

J. Fu, T. Quast, E. Velke, M. Esslinger, M. Pastuschek, A. Schirmacher, R. Aschan, F. Manoocheri, E. Ikonen 2023 Review of Scientific Instruments

Cantilever-based photoacoustic sensor for terahertz range

Erkki Ikonen, Sucheta Sharma, Mohsen Ahmadi, Jussi Rossi, Markku Vainio, Zhipei Sun, Andreas Steiger 2023 Proceedings of SPIE - The International Society for Optical Engineering
More information on our research in the Aalto research portal.
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