Serial time-encoded amplified imaging for real-time observation of fast dynamic phenomena

K. Goda (), K. K. Tsia and B. Jalali
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K. Goda: University of California, Los Angeles, California 90095, USA
K. K. Tsia: University of California, Los Angeles, California 90095, USA
B. Jalali: University of California, Los Angeles, California 90095, USA

Nature, 2009, vol. 458, issue 7242, 1145-1149

Abstract: An ultrarapid camera Ultrafast real-time optical imaging is used in many areas of science, from biological imaging to the study of shockwaves. But in systems that undergo changes on very fast timescales, conventional technologies such as CCD (charge-coupled-device) cameras are compromised. Either imaging speed or sensitivity has to be sacrificed unless special cooling or extra-bright light is used. This is because it takes time to read out the data from sensor arrays, and at high frame rates only a few photons are collected. Now a UCLA team has developed an imaging method that overcomes these limitations and offers frame rates at least a thousand times faster than those of conventional CCDs, making this perhaps the world's fastest continuously running camera, with a shutter speed of 440 picoseconds. The technology — serial time-encoded amplified microscopy or STEAM — maps a two-dimensional image into a serial time-domain data stream and simultaneously amplifies the image in the optical domain. A single-pixel photodetector then captures the entire image.

Date: 2009
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DOI: 10.1038/nature07980

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