2014
DOI: 10.1007/s12650-014-0220-7
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Performance evaluation of an overdriven LED for high-speed schlieren imaging

Abstract: A quantitative comparison of an over driven light emitting diode (LED) and a high intensity discharge lamp (HID) as illumination sources for high-speed schlieren imaging is presented. A custom pulser circuit utilizing a new and improved driver circuit was developed to overdrive the LED by a factor of ten while simultaneously reducing pulse widths to sub-microsecond durations. The LED system has been developed as a simple and inexpensive alternative light source to discharge lamps and pulsed laser systems, whic… Show more

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Cited by 29 publications
(9 citation statements)
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“…Driving LEDs in this regime is not challenging. A comparison of Xenon flash lamps vs. pulse-driven LED illuminators is provided by Wilson et al (2015).…”
Section: Optical Pulse Energy and Peak Powermentioning
confidence: 99%
“…Driving LEDs in this regime is not challenging. A comparison of Xenon flash lamps vs. pulse-driven LED illuminators is provided by Wilson et al (2015).…”
Section: Optical Pulse Energy and Peak Powermentioning
confidence: 99%
“…Time resolution was deemed necessary to analyze the relatively short timescale and high frequency phenomena that occur in the near field, as well as perform high quality cross correlations within the flow-field. To achieve reasonable time resolution, a Photron FASTCAM SA-Z was used in conjunction with a 2100 lumen overdriven Luminus CBT-120 green LED [8], [9] and two high quality sister parabolic mirrors. With our chosen setup, we are able to achieve frame-rates from 50,000 to 400,000 frames per second, with window sizes up to 12.5 inches in diameter (please see [10] for full experimental detail, including facility description and schematics).…”
Section: Instrumentationmentioning
confidence: 99%
“…A pulsed, overdriven current LED system based upon the work in [33][34][35][36][37][38] was developed for use in this study. The system consisted of a high power, green Phatlight CBT-40 LED [39] which is rated to operate with a current of 5.9 A continuous or 9.8 A pulsed (50% duty cycle).…”
Section: Led Illumination Systemmentioning
confidence: 99%