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.
Metrology Research Institute
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.
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.
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.
Flat-field calibration method for hyperspectral frame cameras
Validation of the fisheye camera method for spatial non-uniformity corrections in luminous flux measurements with integrating spheres
Optical Characterization of III-V Multijunction Solar Cells for Temperature-Independent Band Gap Features
Transconductance amplifier for optical metrology applications of light-emitting diodes
Spatial and Spectral Corrections for Integrating Sphere Photometry and Radiometry
Accelerated ageing of organic LED panels using ultraviolet exposure
Development of white LED illuminants for colorimetry and recommendation of white LED reference spectrum for photometry
Uncertainty analysis of total ozone derived from direct solar irradiance spectra in the presence of unknown spectral deviations
Relationships between junction temperature, electroluminescence spectrum and ageing of light-emitting diodes
LED based reference for wavelength and relative intensity
More information about us
The Metrology Research Institute is the Finnish National Standards Laboratory for optical quantities. We offer various radiometric, photometric and spectrophotometric calibrations.
MRI Doctors' club gathers together doctors, who have graduated from the laboratory during its existence.