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Optical design verification in the EBV LightLab


EBV LightLab was created to offer our customers a wide range of measurements on a lighting products portfolio offering the entire range of highly professional devices
The list of the measuring devices includes two integrating spheres for 2π and 4π measurements, a spectroradiometer for reference measurements, a goniophotometer, a light density measuring device and a luxmeter. This product range is complemented by special measurement/evaluation and control software, source meters and multimeters, a thermal camera and supplementary tools.
 

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  • Measuring on Level 1 (LED packages), Level 2 (LED modules) and Level 3 (luminaires)

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  •  Radiometric and photometric quantities


           radiant power [W], radiant intensity [W/sr], irradiance [W/m²], radiance [W/m² sr]
           luminous flux [lm], luminous intensity [cd], luminance [lx], luminance [cd/m²]
           EBV helps with measurement and verification of customer‘s luminaire quality parameters, LED data sheet and bin verifications and EULUM.DAT file creation for simulations. Furthermore, EBV is able to compare performance parameters of different manufacturers and has built up a data base

  • Spectral parameters


           dominant wavelength, spectral width
           The dominant wavelength and purity determine the LED‘s colour, so an analysis of influences modifying them is key. EBV helps with verification of driver/driver signal that might cause shifts, ageing phenomenon.

  • Colorimetric parameters Image of Colometric parameters
           chromaticity coordinates, CRI (Color Rendering Index), Correlated Colour Temperature (CCT) and also GAI (Gamut Area Index), CQS (Color Quality Scale) for chroma/saturation, tint and lightness analysis
           EBV can provide the industry standard GAI value if the LED manufacturer isn‘t stating these in data sheets. 


Thermal analysis Image of Thermal analysis

  • Thermal imaging camera analysis
  • CFD analysis
     

When developing a new luminaire system, the basic product concept must be validated, reconciling mechanical and aesthetic ideas with the realities of thermal behaviour.

The key to successful LED system design is to transfer the heat that is being generated in the LED‘s junction to the ambient. The path involves both the printed circuit board that mounts the LED and the enclosure.

Rather than developing several prototypes it is more effective and less costly to simulate the new luminaire virtually. A Computational Fluid Dynamics (CFD) analysis is suitable to test the heat dispersion properties of an emerging luminaire design. It uses numerical analysis and algorithms to solve and analyze such problems.


Electronics design capabilities

Example: 120W dual-channel STLUX based digital LED driver

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Further examples: 120W dual-channel STLUX based digital LED driver – contact us for more information and the schematics excerpt/MCU or schematics excerpt/output stage.

 

 

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EBV LightLab

From using spectroradiometers and goniophotometers to thermal imagers, the complete spectrum of products from individual LEDs right up to the complete luminaires are covered in the EBVLightLab.

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