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Futa MOCHIZUKI (Shizuoka University)

“The world-fastest silicon multi-framing at 200 Mfps” A breakthrough by opto-electro-computational architecture

Title: Single-shot/repetitive 200 Mfps compressive CMOS image sensor
Author: Futa Mochizuki1, Keiichiro Kagawa1, Shin-ichiro Okihara2, Min-Woong Seo1, Bo Zhang1, Taishi Takasawa1, Keita Yasutomi1, and Shoji Kawahito1
Affiliation: 1 Shizuoka University, Hamamatsu, Shizuoka, Japan
2 The Graduate School for the Creation of New Photonics Industries, Hamamatsu, Shizuoka, Japan
 
Futa Mochizuki

Keiichiro Kagawa

Shin-ichiro Okihara

Min-Woong Seo
 
Bo Zhang

Taishi Takasawa

Keita Yasutomi

Shoji Kawahito
Email: fmochi[at]idl.rie.shizuoka.ac.jp
Email: http://www.idl.rie.shizuoka.ac.jp/index-e.html
Abstract:
Ultra-high-speed (UHS) silicon-based cameras are a powerful tool for biology as well as physics and mechanics to analyze the process of UHS phenomena. The frame rate of the state-of-the-art commercial burst-readout UHS silicon image sensors has reached approximately 20Mfps. To observe faster phenomena, much faster cameras are desired. To enhance the frame rate further, an architectural revolution on the silicon image sensor is required. We have proposed a UHS compressive CMOS image sensor based on multi-aperture optics, which has the potential to open the door to the 10Gfps regime. Every aperture captures a temporally compressed image by applying a random coded shutter, where the ultrafast charge modulator called LEFM (lateral electric field charge modulator) is used in a pixel. The temporally resolved images are reconstructed from the captured compressed images and the applied shutter patterns by solving the inverse problem after image readout. Experiments with a prototype sensor demonstrated that 32 temporally resolved images at 200Mfps were reconstructed from the 15 compressed images.
Biographical Sketch: Futa Mochizuki received his M.E. degree from Shizuoka University, Shizuoka, Japan in 2013. He is currently pursuing the Ph. D. in Shizuoka University, Shizuoka, Japan. He is a student member of the ITE and IEEE. His current interest is in CMOS image sensors.

Keiichiro Kagawa received the Ph.D. degree in engineering from Osaka University, Osaka, Japan, in 2001. In 2001, he joined Graduate School of Materials Science, Nara Institute of Science and Technology as an Assistant Professor. In 2007, he joined Graduate School of Information Science, Osaka University as an Associate Professor. Since 2011, he has been an Associate Professor with Shizuoka University, Hamamatsu, Japan. His research interests cover high-performance CMOS image sensors, imaging systems, and biomedical applications.

Shin-ichiro Okihara received his Ph.D in Engineering from Osaka University (2003). He is currently an Associate Professor at the Graduate School for the Creation of New Photonics Industries. His research interests include laser materials processing, intense lasers, laser-plasma, and high-speed imaging.

Min-Woong Seo received the Ph.D. degree from Shizuoka University, Hamamatsu, Japan, in 2012 for his thesis on low noise, high dynamic range CMOS image sensor using high performance ADCs. From 2012 to 2014, he was a JSPS Postdoctoral Research Fellow at the same research group. Since 2014, he has been a Specially Appointed Assistant Professor with the Research Institute of Electronics, Shizuoka University. His research interests are in CMOS imaging devices, bioimaging, and mixed analog/digital circuit designs.

Bo Zhang received the B.E. degrees from Xi'an Polytechnic University, Xi'an, China, in 2008, and the M.E. degrees from Shizuoka University in 2013. He is currently a Ph. D student at Shizuoka University. His research interest is low-noise high-sensitivity multi-aperture imaging system.

Taishi Takasawa received the B.S. degree from Tokai University, Kanagawa, Japan, in 2003. In 2009, he joined Shizuoka University, Hamamatsu, Japan, where he is engaged in the design of the digital circuit and the verilog language.

Keita Yasutomi received the Ph.D. degree from Shizuoka University, Hamamatsu, Japan, in 2011. He is currently an Assistant Professor with the Research Institute of Electronics, Shizuoka University. He is a member of the ITE, IEICE, and IEEE. His research interests include time-resolved CMOS image sensors and low-noise imagers.

Shoji Kawahito received the Ph.D. degree from Tohoku University, Sendai, Japan, in 1988. He is presently a Professor with the Research Institute of Electronics, Shizuoka University and the CTO of Brookman Technology Inc. He is a Fellow of the IEEE and ITE. His research interests are in analog circuits and pixel architecture designs for CMOS imagers.

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