Dr. Luke Dosiek Profile

Dr. Luke Dosiek

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Proceedings Article | 28 May 2013 Paper

Passive radiation detection using optically active CMOS sensors

Luke Dosiek, Patrick Schalk

Proceedings Volume 8755, 875513 (2013) https://doi.org/10.1117/12.2015543

KEYWORDS: CMOS sensors, Video, Sensors, Cameras, Visible radiation, Active optics, Image sensors, Binary data, Signal processing, Image processing

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Recently, there have been a number of small-scale and hobbyist successes in employing commodity CMOS-based camera sensors for radiation detection. For example, several smartphone applications initially developed for use in areas near the Fukushima nuclear disaster are capable of detecting radiation using a cell phone camera, provided opaque tape is placed over the lens. In all current useful implementations, it is required that the sensor not be exposed to visible light. We seek to build a system that does not have this restriction. While building such a system would require sophisticated signal processing, it would nevertheless provide great benefits. In addition to fulfilling their primary function of image capture, cameras would also be able to detect unknown radiation sources even when the danger is considered to be low or non-existent. By experimentally profiling the image artifacts generated by gamma ray and β particle impacts, algorithms are developed to identify the unique features of radiation exposure, while discarding optical interaction and thermal noise effects. Preliminary results focus on achieving this goal in a laboratory setting, without regard to integration time or computational complexity. However, future work will seek to address these additional issues.

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