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A visible LED lab makes evaluating LED assemblies easy

By Kathleen Zipp | June 27, 2007

Converting an existing halogen lamp into an LED assembly is not simple. However, for Richard Saffa, vice president of Optek Technology’s Visible LED Business Unit, it is. His in-house visible LED laboratory has a variety of equipment to assess products from single LEDs to complex power LED assemblies.

Thus, when a customer came with these requirements, his team went to work. “With the equipment in our lab, we matched the spot size, luminous flux, and uniformity of the halogen lamp to the assembly, as well as increased the optical efficiency, and recommended a custom designed LED solution that fit exactly what the customer needed,” said Saffa. What’s more, the customer can watch the testing first-hand and has access to full comparison data. The lab has the equipment to assess variations over time and junction temperature in most common optical parameters, including dominant wavelength, color temperature, and color rendering index.

The equipment includes a large one-meter integrating sphere to determine color temperature (CCT) and brightness (TLF) ; a thermal imaging camera for optimizing thermal management designs that enhance the lifespan and light output of power LED assemblies, and a scanning electron microscope with a Princeton Gamma Tech X-ray analyzer for failure analysis. The lab also houses a luminous flux and wavelength tester to verify color and hue; and a spectroradiometer system accommodating wavelengths from 200 nm to 780 nm, measuring the radiometric and photometric characteristics of LED assemblies of all shapes. The spectroradiometer system includes a goniometer, CIE 127 Publication Condition A&B tube, and a 6 in. integrating sphere.

DFM.OPTEK.VisibleLAB.05-2007.jpg

TT electronics plc, Optek Technologies
www.optekinc.com

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