Browsing by Author "Barakhshan, Peyman"
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Item End to end testing and non-uniformity detection and correction of superlattice light emitting diodes infrared scene projectors(University of Delaware, 2020) Barakhshan, PeymanInfrared (IR) detectors are widely used in different industries, such as autonomous cars and the military. IR scene generators have been on demand for testing the guidance systems built with IR detectors. In 2014, the CVORG team at the University of Delaware built the world’s first IR LED (light-emitting diode) scene projector. This system is known as the SLEDS (super-lattice light-emitting diode systems) and has been thoroughly tested and evaluated at numerous user facilities. ☐ New and upgraded versions of the SLEDS projector have been developed, and the need for Testing and characterization of these systems has become more critical than ever. The goal of this research is to test all components in the system and characterize and fix the non-uniformity of the LEDs using the software. The most important part about the non-uniformity correction is to have a stable system, and therefore, understanding how each component works and behaves is crucial in achieving the goal of this paper. ☐ The following is the list of five original contributions to knowledge related to the SLEDS project: • 1. Control interface to monitor and test IR scene projectors. (Chapter 2) • 2. Study and automation of Non-uniformity detection of IR LED arrays. (Chapter 3) • 3. Study and automation of Non-uniformity correction of IR LED arrays. (Chapter 5) • 4. Rise time calculation of IR LED scene projectors. (Chapter 3) • 5. Study and testing the behavior of IR LED arrays. (Chapters 3–5)Item Thermal performance characterization of a 512x512 mid-wave infrared super lattice light emitting diode projector(University of Delaware, 2016) Barakhshan, PeymanIn 2014, our team built the world’s first infrared LED scene projector. This system is called the SLEDS projector. It displays 512x512 MWIR images from a DVI computer interface at 100HZ. The projector has been successfully evaluated at multiple user facilities and has logged several hundred hours of operation. Thermal modelling was done to simulate the dissipation of heat in the infrared scene projector (IRSP). Current work is being done at the University of Delaware’s Scene Projection Evaluation and Research (SPEAR) laboratory to evaluate and update the thermal models. ☐ Due to the importance of the infrared detectors in today’s world, it is necessary to accurately test and characterize these detectors with a frame of reference related to the application. IR projection systems are a great way to characterize the detectors because they can be used as a high accuracy reference. ☐ Described in this work, is a 512x512 super-latticed light emitting diode system (SLEDS) operating at a frame rate of 100Hz. This system has been fully developed, tested, and corrected for non-uniformity (NUC). Stress testing and heat response characteristics are the main goals of this paper.