Photometry and Radiometry

The Photometry and Radiometry Group provides internationally recognized primary standards for optical radiation measurements. These standards support the metrological needs of Canadian industry and help reduce technical barriers to world trade. The Group maintains and improves standards for the measurement of light, ultraviolet and infrared radiation in the wavelength range 200 nm to 50,000 nm, and carries out targeted research and development in areas of current and anticipated technological growth in Canada. Photometric and radiometric standards are disseminated through a comprehensive calibration service and by timely response to technical inquiries and requests for services and collaborative R&D arrangements.

The research program of the Group includes the photometric and radiometric standards of luminous intensity (the candela), luminous flux, spectral irradiance, spectral radiance, spectral responsivity, spectral transmittance and reflectance (regular and diffuse), specular gloss, and industrial colorimetry.

Cooperative research with colleagues and clients, participation in international standards organizations, and comparisons of national standards with the National Metrology Institutes (NMIs) of other countries insures international recognition.