Department of Signal Processing and Acoustics

Metrology Research Institute

Metrology Research Institute focuses on optical radiation measurements and related activities. We do not forecast the weather!
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 EMRP and EMPIR.

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.

The research group is led by Professor Erkki Ikonen. For other staff members, see Aalto People - Signal Processing and Acoustics (note that not all profiles are public). 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

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 Signal Processing and Acoustics
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Radiometry

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

Department of Signal Processing and Acoustics
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Spectrophotometry

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 Signal Processing and Acoustics
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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 Signal Processing and Acoustics

Latest publications

LED-Based Photoacoustic NO2Sensor with a Sub-ppb Detection Limit

Juho Karhu, Tuomas Hieta, Farshid Manoocheri, Markku Vainio, Erkki Ikonen 2021 ACS Sensors

Simple method for mid-infrared optical frequency comb generation with dynamic offset frequency tuning

Mikhail Roiz, Krishna Kumar, Juho Karhu, Markku Vainio 2021 APL Photonics

Photoacoustic characteristics of carbon-based infrared absorbers

Jussi Rossi, Juho Uotila, Sucheta Sharma, Toni Laurila, Roland Teissier, Alexei Baranov, Erkki Ikonen, Markku Vainio 2021 Photoacoustics

Effect of adaptive control on the LED street luminaire lifetime and on the lifecycle costs of a lighting installation

J. Askola, P. Kärhä, H. Baumgartner, S. Porrasmaa, E. Ikonen 2021 Lighting Research and Technology

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

Elvira Martikainen, Anna Vaskuri, Timo Dönsberg, Erkki Ikonen 2020 Review of Scientific Instruments

Interlaboratory Comparison of the PV Module Energy Rating Standard IEC 61853-3

M.R Vogt, S. Riechelmann, A.M. Gracia-Amillo, Anton Driesse, Alexander Kokka, Kinza Maham, Petri Kärhä, R. Kenny, C. Schinke, K. Bothe, J.C. Blakesley, E. Music, F. Plag, G. Friesen, G. Corbellini, N. Riedel-Lyngskær, R. Valckenborg, M. Schweiger, W. Herrmann 2020 Proceedings of the European Photovoltaic Solar Energy Conference and Exhibition
More information on our research in the Research database.
Research database

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