PHOTOMETRIC MEASUREMENTS
Photometric measurements fall within the field of radiometry, which deals with the determination of the energy and power of radiation properties. Measurement of radiation in visible spectrum, taking into account the influence of the spectral sensitivity of the human eye is called photometry; measured quantities are called photometric and are relative. Radiometry deals with radiation as a form of energy and uses objective quantities. Radiometric quantities characterize the amount of energy transmitted by radiation.
BASIC TYPES OF TESTS:
Measurement of luminous flux
is performed in an integrating sphere. Photometric quantities are obtained with either very precise photometer or with spectroradiometer.
Measurement of luminous intensity distribution of luminaires and lamps
is performed on goniophotometer. Measured data areprovided in formats used in lighting calculation programs databases.
Measurement of photobiological hazard
The purpose of photobiological hazard of lamps and lamp systems is evaluation of the potential hazard of the effects of non-laser optical radiation on human. Measurements are performed using Spectroradiometer with double monochromator which provides the desired selectivity and measuring range in a wide wavelength band.
Measuring of spectral characteristics of light sources
is performed by a spectroradiometer, which allows to determine parameters, such as luminous flux, radiant flux, colour temperature, colour rendering index CRI, dominant wavelength length, spectral purity, etc.