Short-Pulse Testing Eliminates Self-Heating Errors to Produce True L-I Graphs
Since the rise of LEDs as the preferred light source, accurate determination of their parameters has become crucial. One of…
Jeff Hulett
Jeff Hulett is the Founder and CTO of Vektrex Electronic Systems, Inc. Because of his vision and leadership, the company grew from a start-up to the market leader. Currently, Hulett is the Chief Architect for Vektrex products placing the highest emphasis on technology and quality. Hulett holds a BSEE from the Illinois Institute of Electronics, and has been awarded four U.S.patents. He is a member of the Illumination Engineering Society of North America (IESNA), and chairs the IESNA LM-80 working group that is focused on LED flux maintenance testing. He has been active in the LED testing and reliability field since 2004.
Amber LED Light Research
Vektrex amber LED light research project identified and confirmed a light measurement anomaly. Vektrex actively participates in research focused on…
I-V Curve Tracing for Transistors
I-V curve tracing for transistors is easily accomplished with the SpikeSafe SMU. The SpikeSafe’s short pulsing capability allows the true…
Use Fast Precise Pulsed SMU to Improve High-Power IV Characterization
Devices such as lasers and LEDs are characterized by plotting the forward current vs voltage for the device’s typical operating…
Application Note: Laser Diode Power Supply Transient Response Under Typical Laser Diode Fault Conditions
When a laser fails, it can suffer catastrophic damage if the power supply does not have a failsafe. This application note documents tests conducted with three different types of power supplies to determine how they respond to a typical failure scenario.
The Industry Needs Better LED Measurements
Hulett presents the old-world problem that plagues today's LED measurements. Learn what it is, why it matters, and what you can do about it.
Is Your Light Measurement Method Undervaluing Your LEDs?
The LED industry is facing a roadblock that threatens its continued rapid evolution. Learn how to dodge it by reading this technical article.
Video: Three Steps to Improved LED Light Measurements: Repeatability
In this webinar, Jeff Hulett discusses factors that must be controlled for optimal repeatability and provides examples of what to look for and what to avoid in your measurement system.
Video: Three Steps to Improved LED Light Measurements: Accuracy
In this webinar, Jeff Hulett discusses the three LM-85 measurement methods and hones in on the method that provides the most accurate measurements: Continuous Pulse.