Optical, electrical, and thermal properties measurements for light sources and devices

Optical, electrical, and thermal properties measurements for light sources and devices

Sukurta: 26 November 2018
Unit: Faculty of Physics
Keywords: Light sources, devices, optical properties, electrical properties, thermal per operties, characterisation, semiconductors, LED, optical flow, performance, luminance, colour, current, power, reactive power factor, harmonic distortion

We are capable to carry out a full characterization of light sources.

This service is primarily focused on the semiconductor light sources (LEDs) and other LED devices, but also can be used for common light sources (incandescent lamps and discharge lamps).
In addition to photometric studies serious attention is paid to investigation of the heat properties. This is of crucial importance for LED lighting. During the research the temperature of LED pad can be set from -20 to 80°C, and temperature dependence tests can be performed. The cooling system can be tested with high resolution thermovisor.

Application. The possibility to measure light sources optical flux and performance (0,2 – 11000 lm).
The possibility to measure light sources optical flow spatial distribution and create digital IES file for further modeling. Angular resolution > 0,5°, the overall confidence interval +/- 5%.
The possibility to measure the luminance (0,0001 - 200000 cd/m²) and colour of light sources (such as scoreboards, displays, signs) and illuminated surfaces (eg, streets). The confidence interval is +/- 4%, colour coordinate accuracy is +/- 0,005 Duv.
The possibility to measure thermal characteristics of devices and equipment with high resolution thermal imager with close-up lenses if needed. (resoliution <1mm, temperature range -20—120°C).
The possibility to examine electrical parameters of light sources (forward current, power, reactive power factor, high frequency harmonic distortion performance) for both AC and DC modes (0,01-20 A, 0-500 V, 15Hz-10kHz).

Contacts: Dr. Pranciškus Vitta, tel. +37060034126,