Measuring LED Junction Temperature (Tj)
Jeff Hulett teaches how to measure junction temperature (Tj) with this in-depth guide and step by step sample experiment.
Applications
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Vektrex’s Performance Current Source Series—an Innovative Tool for Improving LED Light Measurements
By using the SpikeSafe Performance Current Source Series and testing methods such as the IESNA LM-85 High Power LED test methods that reduce junction heating, the industry can close the measurement gap and continue its relentless drive to higher LED power density.
Video: Three Steps to Improved LED Light Measurements: Power
In this webinar, Jeff Hulett teaches what equipment, measurement methods, and pulse widths will provide the best LED light measurements.
LEDs Get A Life Sentence
NIST welcomed delivery of the Vektrex-developed automated burn-in/light measurement system. White light LEDS from four different manufacturers have been sealed…
LM-80 Solution Delivers Accurate Pulse Width Modulation
Vektrex offers the only LM-80 test solution on the market combining the ability to test in both LM-80-15 accepted modes—constant…
Video: Overview of LM-80 Standards Update
On August 20, 2015, Jeff Hulett, CTO of Vektrex and Jianzhong Jiao of Osram Opto Semiconductors, provided an overview of…
Improved Photometric Testing for High-Power LEDs
Photometric testing standards first appeared in the late 1800’s; they were needed by the emerging gas lighting industry. Later standards…
LM-85 Light Measurements for High Power LEDs
LM-85 is an Illuminating Engineering Society (IES) approved method for the Electrical and Photometric Measurements of High Power LEDs. The…
How to power LEDs during optical measurements per LM-85
How to power LEDs during optical measurements per LM-85. See Jeff Hulett / Vektrex presentation at CIE / CORM /…