MAGAZINE: LED system design improves with optical and thermal performance verification
The ability to quickly and easily produce accurate optical and thermal measurements for LED devices has a major positive impact on the system design process, says James Petroski.
Traditional approaches for measuring LED performance, such as measuring optical performance with an integrating optical sphere, take considerable amounts of time and require interpretation of results that can lead to inaccuracies. A new generation of integrating test systems can reduce the time required to measure LED optical and thermal performance. This approach combines traditional thermal testing with photo detectors to automatically provide a complete optical and thermal characterization of power LEDs. Thermal metrics, as well as optical parameters such as luminous flux and efficancy, can all be measured as a function of temperature and operating current.
This article was published in the May/June 2009 issue of LEDs Magazine.
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