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Customer
Design
/ Packaging
/ LED
selection (binning) / Photometric
and radiometric measurements |
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PLS has its own photometric and radiometric laboratory equipped with NIST-calibrated optical instruments. The electrooptic parameters of single LEDs or LED modules can be measured
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Measurements
are necessary to accurately determine such optical characteristics of LEDs
like radiation pattern (viewing angle), luminous intensity, luminous flux,
peak wavelength, dominant wavelength and color coordinates (in accordance
to CIE standards) in visible spectral region and radiant intensity and
radiant flux (radiant power) in ultraviolet and infrared. We perform both
R&D and production testing using special test fixtures for various LED
packages. The Ocean Optics HR4000CG-UV-NIR High-Resolution CCD Array
Spectrometer is used for spectral measurements of ultraviolet, visible and
infrared LEDs. International Light Integrating Sphere INS-250 together
with Research Radiometer IL-1700 is used for luminous and radiant flux
measurements. Degradation measurements and burn-in (in accordance to MIL
standards) are performed with special test benches at different forward
currents. We can select LEDs using various electric, radiometric,
photometric and colorimetric criteria